drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.19"
  25 #define TPACPI_SYSFS_VERSION 0x020200
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <linux/leds.h>
  71 #include <asm/uaccess.h>
  72
  73 #include <linux/dmi.h>
  74 #include <linux/jiffies.h>
  75 #include <linux/workqueue.h>
  76
  77 #include <acpi/acpi_drivers.h>
  78 #include <acpi/acnamesp.h>
  79
  80 #include <linux/pci_ids.h>
  81
  82
  83 /* ThinkPad CMOS commands */
  84 #define TP_CMOS_VOLUME_DOWN     0
  85 #define TP_CMOS_VOLUME_UP       1
  86 #define TP_CMOS_VOLUME_MUTE     2
  87 #define TP_CMOS_BRIGHTNESS_UP   4
  88 #define TP_CMOS_BRIGHTNESS_DOWN 5
  89 #define TP_CMOS_THINKLIGHT_ON   12
  90 #define TP_CMOS_THINKLIGHT_OFF  13
  91
  92 /* NVRAM Addresses */
  93 enum tp_nvram_addr {
  94         TP_NVRAM_ADDR_HK2               = 0x57,
  95         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  96         TP_NVRAM_ADDR_VIDEO             = 0x59,
  97         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  98         TP_NVRAM_ADDR_MIXER             = 0x60,
  99 };
 100
 101 /* NVRAM bit masks */
 102 enum {
 103         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 104         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 105         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 106         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 107         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 108         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 109         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 110         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 111         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 112         TP_NVRAM_MASK_MUTE              = 0x40,
 113         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 114         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 115         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 116 };
 117
 118 /* ACPI HIDs */
 119 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 120
 121 /* Input IDs */
 122 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 123 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 124
 125
 126 /****************************************************************************
 127  * Main driver
 128  */
 129
 130 #define TPACPI_NAME "thinkpad"
 131 #define TPACPI_DESC "ThinkPad ACPI Extras"
 132 #define TPACPI_FILE TPACPI_NAME "_acpi"
 133 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 134 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 135
 136 #define TPACPI_PROC_DIR "ibm"
 137 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 138 #define TPACPI_DRVR_NAME TPACPI_FILE
 139 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 140 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 141
 142 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 143
 144 #define TPACPI_MAX_ACPI_ARGS 3
 145
 146 /* Debugging */
 147 #define TPACPI_LOG TPACPI_FILE ": "
 148 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 149 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 150 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 151 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 152
 153 #define TPACPI_DBG_ALL          0xffff
 154 #define TPACPI_DBG_ALL          0xffff
 155 #define TPACPI_DBG_INIT         0x0001
 156 #define TPACPI_DBG_EXIT         0x0002
 157 #define dbg_printk(a_dbg_level, format, arg...) \
 158         do { if (dbg_level & a_dbg_level) \
 159                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 160         } while (0)
 161 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 162 #define vdbg_printk(a_dbg_level, format, arg...) \
 163         dbg_printk(a_dbg_level, format, ## arg)
 164 static const char *str_supported(int is_supported);
 165 #else
 166 #define vdbg_printk(a_dbg_level, format, arg...)
 167 #endif
 168
 169 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 170 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 171 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 172
 173
 174 /****************************************************************************
 175  * Driver-wide structs and misc. variables
 176  */
 177
 178 struct ibm_struct;
 179
 180 struct tp_acpi_drv_struct {
 181         const struct acpi_device_id *hid;
 182         struct acpi_driver *driver;
 183
 184         void (*notify) (struct ibm_struct *, u32);
 185         acpi_handle *handle;
 186         u32 type;
 187         struct acpi_device *device;
 188 };
 189
 190 struct ibm_struct {
 191         char *name;
 192
 193         int (*read) (char *);
 194         int (*write) (char *);
 195         void (*exit) (void);
 196         void (*resume) (void);
 197         void (*suspend) (pm_message_t state);
 198
 199         struct list_head all_drivers;
 200
 201         struct tp_acpi_drv_struct *acpi;
 202
 203         struct {
 204                 u8 acpi_driver_registered:1;
 205                 u8 acpi_notify_installed:1;
 206                 u8 proc_created:1;
 207                 u8 init_called:1;
 208                 u8 experimental:1;
 209         } flags;
 210 };
 211
 212 struct ibm_init_struct {
 213         char param[32];
 214
 215         int (*init) (struct ibm_init_struct *);
 216         struct ibm_struct *data;
 217 };
 218
 219 static struct {
 220 #ifdef CONFIG_THINKPAD_ACPI_BAY
 221         u32 bay_status:1;
 222         u32 bay_eject:1;
 223         u32 bay_status2:1;
 224         u32 bay_eject2:1;
 225 #endif
 226         u32 bluetooth:1;
 227         u32 hotkey:1;
 228         u32 hotkey_mask:1;
 229         u32 hotkey_wlsw:1;
 230         u32 hotkey_tablet:1;
 231         u32 light:1;
 232         u32 light_status:1;
 233         u32 bright_16levels:1;
 234         u32 bright_acpimode:1;
 235         u32 wan:1;
 236         u32 fan_ctrl_status_undef:1;
 237         u32 input_device_registered:1;
 238         u32 platform_drv_registered:1;
 239         u32 platform_drv_attrs_registered:1;
 240         u32 sensors_pdrv_registered:1;
 241         u32 sensors_pdrv_attrs_registered:1;
 242         u32 sensors_pdev_attrs_registered:1;
 243         u32 hotkey_poll_active:1;
 244 } tp_features;
 245
 246 static struct {
 247         u16 hotkey_mask_ff:1;
 248         u16 bright_cmos_ec_unsync:1;
 249 } tp_warned;
 250
 251 struct thinkpad_id_data {
 252         unsigned int vendor;    /* ThinkPad vendor:
 253                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 254
 255         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 256         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 257
 258         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 259         u16 ec_model;
 260
 261         char *model_str;        /* ThinkPad T43 */
 262         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 263 };
 264 static struct thinkpad_id_data thinkpad_id;
 265
 266 static enum {
 267         TPACPI_LIFE_INIT = 0,
 268         TPACPI_LIFE_RUNNING,
 269         TPACPI_LIFE_EXITING,
 270 } tpacpi_lifecycle;
 271
 272 static int experimental;
 273 static u32 dbg_level;
 274
 275 /* Special LED class that can defer work */
 276 struct tpacpi_led_classdev {
 277         struct led_classdev led_classdev;
 278         struct work_struct work;
 279         enum led_brightness new_brightness;
 280 };
 281
 282 /****************************************************************************
 283  ****************************************************************************
 284  *
 285  * ACPI Helpers and device model
 286  *
 287  ****************************************************************************
 288  ****************************************************************************/
 289
 290 /*************************************************************************
 291  * ACPI basic handles
 292  */
 293
 294 static acpi_handle root_handle;
 295
 296 #define TPACPI_HANDLE(object, parent, paths...)                 \
 297         static acpi_handle  object##_handle;                    \
 298         static acpi_handle *object##_parent = &parent##_handle; \
 299         static char        *object##_path;                      \
 300         static char        *object##_paths[] = { paths }
 301
 302 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 303            "\\_SB.PCI.ISA.EC",  /* 570 */
 304            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 305            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 306            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 307            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 308            "\\_SB.PCI0.LPC.EC", /* all others */
 309            );
 310
 311 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 312 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 313
 314 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 315                                         /* T4x, X31, X40 */
 316            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 317            "\\CMS",             /* R40, R40e */
 318            );                   /* all others */
 319
 320 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 321            "^HKEY",             /* R30, R31 */
 322            "HKEY",              /* all others */
 323            );                   /* 570 */
 324
 325 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 326            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 327            "\\_SB.PCI0.VID0",   /* 770e */
 328            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 329            "\\_SB.PCI0.AGP.VID",        /* all others */
 330            );                           /* R30, R31 */
 331
 332
 333 /*************************************************************************
 334  * ACPI helpers
 335  */
 336
 337 static int acpi_evalf(acpi_handle handle,
 338                       void *res, char *method, char *fmt, ...)
 339 {
 340         char *fmt0 = fmt;
 341         struct acpi_object_list params;
 342         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 343         struct acpi_buffer result, *resultp;
 344         union acpi_object out_obj;
 345         acpi_status status;
 346         va_list ap;
 347         char res_type;
 348         int success;
 349         int quiet;
 350
 351         if (!*fmt) {
 352                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 353                 return 0;
 354         }
 355
 356         if (*fmt == 'q') {
 357                 quiet = 1;
 358                 fmt++;
 359         } else
 360                 quiet = 0;
 361
 362         res_type = *(fmt++);
 363
 364         params.count = 0;
 365         params.pointer = &in_objs[0];
 366
 367         va_start(ap, fmt);
 368         while (*fmt) {
 369                 char c = *(fmt++);
 370                 switch (c) {
 371                 case 'd':       /* int */
 372                         in_objs[params.count].integer.value = va_arg(ap, int);
 373                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 374                         break;
 375                         /* add more types as needed */
 376                 default:
 377                         printk(TPACPI_ERR "acpi_evalf() called "
 378                                "with invalid format character '%c'\n", c);
 379                         return 0;
 380                 }
 381         }
 382         va_end(ap);
 383
 384         if (res_type != 'v') {
 385                 result.length = sizeof(out_obj);
 386                 result.pointer = &out_obj;
 387                 resultp = &result;
 388         } else
 389                 resultp = NULL;
 390
 391         status = acpi_evaluate_object(handle, method, &params, resultp);
 392
 393         switch (res_type) {
 394         case 'd':               /* int */
 395                 if (res)
 396                         *(int *)res = out_obj.integer.value;
 397                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 398                 break;
 399         case 'v':               /* void */
 400                 success = status == AE_OK;
 401                 break;
 402                 /* add more types as needed */
 403         default:
 404                 printk(TPACPI_ERR "acpi_evalf() called "
 405                        "with invalid format character '%c'\n", res_type);
 406                 return 0;
 407         }
 408
 409         if (!success && !quiet)
 410                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 411                        method, fmt0, status);
 412
 413         return success;
 414 }
 415
 416 static int acpi_ec_read(int i, u8 *p)
 417 {
 418         int v;
 419
 420         if (ecrd_handle) {
 421                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 422                         return 0;
 423                 *p = v;
 424         } else {
 425                 if (ec_read(i, p) < 0)
 426                         return 0;
 427         }
 428
 429         return 1;
 430 }
 431
 432 static int acpi_ec_write(int i, u8 v)
 433 {
 434         if (ecwr_handle) {
 435                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 436                         return 0;
 437         } else {
 438                 if (ec_write(i, v) < 0)
 439                         return 0;
 440         }
 441
 442         return 1;
 443 }
 444
 445 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 446 static int _sta(acpi_handle handle)
 447 {
 448         int status;
 449
 450         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 451                 status = 0;
 452
 453         return status;
 454 }
 455 #endif
 456
 457 static int issue_thinkpad_cmos_command(int cmos_cmd)
 458 {
 459         if (!cmos_handle)
 460                 return -ENXIO;
 461
 462         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 463                 return -EIO;
 464
 465         return 0;
 466 }
 467
 468 /*************************************************************************
 469  * ACPI device model
 470  */
 471
 472 #define TPACPI_ACPIHANDLE_INIT(object) \
 473         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 474                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 475
 476 static void drv_acpi_handle_init(char *name,
 477                            acpi_handle *handle, acpi_handle parent,
 478                            char **paths, int num_paths, char **path)
 479 {
 480         int i;
 481         acpi_status status;
 482
 483         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 484                 name);
 485
 486         for (i = 0; i < num_paths; i++) {
 487                 status = acpi_get_handle(parent, paths[i], handle);
 488                 if (ACPI_SUCCESS(status)) {
 489                         *path = paths[i];
 490                         dbg_printk(TPACPI_DBG_INIT,
 491                                    "Found ACPI handle %s for %s\n",
 492                                    *path, name);
 493                         return;
 494                 }
 495         }
 496
 497         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 498                     name);
 499         *handle = NULL;
 500 }
 501
 502 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 503 {
 504         struct ibm_struct *ibm = data;
 505
 506         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 507                 return;
 508
 509         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 510                 return;
 511
 512         ibm->acpi->notify(ibm, event);
 513 }
 514
 515 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 516 {
 517         acpi_status status;
 518         int rc;
 519
 520         BUG_ON(!ibm->acpi);
 521
 522         if (!*ibm->acpi->handle)
 523                 return 0;
 524
 525         vdbg_printk(TPACPI_DBG_INIT,
 526                 "setting up ACPI notify for %s\n", ibm->name);
 527
 528         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 529         if (rc < 0) {
 530                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 531                         ibm->name, rc);
 532                 return -ENODEV;
 533         }
 534
 535         acpi_driver_data(ibm->acpi->device) = ibm;
 536         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 537                 TPACPI_ACPI_EVENT_PREFIX,
 538                 ibm->name);
 539
 540         status = acpi_install_notify_handler(*ibm->acpi->handle,
 541                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 542         if (ACPI_FAILURE(status)) {
 543                 if (status == AE_ALREADY_EXISTS) {
 544                         printk(TPACPI_NOTICE
 545                                "another device driver is already "
 546                                "handling %s events\n", ibm->name);
 547                 } else {
 548                         printk(TPACPI_ERR
 549                                "acpi_install_notify_handler(%s) failed: %d\n",
 550                                ibm->name, status);
 551                 }
 552                 return -ENODEV;
 553         }
 554         ibm->flags.acpi_notify_installed = 1;
 555         return 0;
 556 }
 557
 558 static int __init tpacpi_device_add(struct acpi_device *device)
 559 {
 560         return 0;
 561 }
 562
 563 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 564 {
 565         int rc;
 566
 567         dbg_printk(TPACPI_DBG_INIT,
 568                 "registering %s as an ACPI driver\n", ibm->name);
 569
 570         BUG_ON(!ibm->acpi);
 571
 572         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 573         if (!ibm->acpi->driver) {
 574                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 575                 return -ENOMEM;
 576         }
 577
 578         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 579         ibm->acpi->driver->ids = ibm->acpi->hid;
 580
 581         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 582
 583         rc = acpi_bus_register_driver(ibm->acpi->driver);
 584         if (rc < 0) {
 585                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 586                        ibm->name, rc);
 587                 kfree(ibm->acpi->driver);
 588                 ibm->acpi->driver = NULL;
 589         } else if (!rc)
 590                 ibm->flags.acpi_driver_registered = 1;
 591
 592         return rc;
 593 }
 594
 595
 596 /****************************************************************************
 597  ****************************************************************************
 598  *
 599  * Procfs Helpers
 600  *
 601  ****************************************************************************
 602  ****************************************************************************/
 603
 604 static int dispatch_procfs_read(char *page, char **start, off_t off,
 605                         int count, int *eof, void *data)
 606 {
 607         struct ibm_struct *ibm = data;
 608         int len;
 609
 610         if (!ibm || !ibm->read)
 611                 return -EINVAL;
 612
 613         len = ibm->read(page);
 614         if (len < 0)
 615                 return len;
 616
 617         if (len <= off + count)
 618                 *eof = 1;
 619         *start = page + off;
 620         len -= off;
 621         if (len > count)
 622                 len = count;
 623         if (len < 0)
 624                 len = 0;
 625
 626         return len;
 627 }
 628
 629 static int dispatch_procfs_write(struct file *file,
 630                         const char __user *userbuf,
 631                         unsigned long count, void *data)
 632 {
 633         struct ibm_struct *ibm = data;
 634         char *kernbuf;
 635         int ret;
 636
 637         if (!ibm || !ibm->write)
 638                 return -EINVAL;
 639
 640         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 641         if (!kernbuf)
 642                 return -ENOMEM;
 643
 644         if (copy_from_user(kernbuf, userbuf, count)) {
 645                 kfree(kernbuf);
 646                 return -EFAULT;
 647         }
 648
 649         kernbuf[count] = 0;
 650         strcat(kernbuf, ",");
 651         ret = ibm->write(kernbuf);
 652         if (ret == 0)
 653                 ret = count;
 654
 655         kfree(kernbuf);
 656
 657         return ret;
 658 }
 659
 660 static char *next_cmd(char **cmds)
 661 {
 662         char *start = *cmds;
 663         char *end;
 664
 665         while ((end = strchr(start, ',')) && end == start)
 666                 start = end + 1;
 667
 668         if (!end)
 669                 return NULL;
 670
 671         *end = 0;
 672         *cmds = end + 1;
 673         return start;
 674 }
 675
 676
 677 /****************************************************************************
 678  ****************************************************************************
 679  *
 680  * Device model: input, hwmon and platform
 681  *
 682  ****************************************************************************
 683  ****************************************************************************/
 684
 685 static struct platform_device *tpacpi_pdev;
 686 static struct platform_device *tpacpi_sensors_pdev;
 687 static struct device *tpacpi_hwmon;
 688 static struct input_dev *tpacpi_inputdev;
 689 static struct mutex tpacpi_inputdev_send_mutex;
 690 static LIST_HEAD(tpacpi_all_drivers);
 691
 692 static int tpacpi_suspend_handler(struct platform_device *pdev,
 693                                   pm_message_t state)
 694 {
 695         struct ibm_struct *ibm, *itmp;
 696
 697         list_for_each_entry_safe(ibm, itmp,
 698                                  &tpacpi_all_drivers,
 699                                  all_drivers) {
 700                 if (ibm->suspend)
 701                         (ibm->suspend)(state);
 702         }
 703
 704         return 0;
 705 }
 706
 707 static int tpacpi_resume_handler(struct platform_device *pdev)
 708 {
 709         struct ibm_struct *ibm, *itmp;
 710
 711         list_for_each_entry_safe(ibm, itmp,
 712                                  &tpacpi_all_drivers,
 713                                  all_drivers) {
 714                 if (ibm->resume)
 715                         (ibm->resume)();
 716         }
 717
 718         return 0;
 719 }
 720
 721 static struct platform_driver tpacpi_pdriver = {
 722         .driver = {
 723                 .name = TPACPI_DRVR_NAME,
 724                 .owner = THIS_MODULE,
 725         },
 726         .suspend = tpacpi_suspend_handler,
 727         .resume = tpacpi_resume_handler,
 728 };
 729
 730 static struct platform_driver tpacpi_hwmon_pdriver = {
 731         .driver = {
 732                 .name = TPACPI_HWMON_DRVR_NAME,
 733                 .owner = THIS_MODULE,
 734         },
 735 };
 736
 737 /*************************************************************************
 738  * sysfs support helpers
 739  */
 740
 741 struct attribute_set {
 742         unsigned int members, max_members;
 743         struct attribute_group group;
 744 };
 745
 746 struct attribute_set_obj {
 747         struct attribute_set s;
 748         struct attribute *a;
 749 } __attribute__((packed));
 750
 751 static struct attribute_set *create_attr_set(unsigned int max_members,
 752                                                 const char *name)
 753 {
 754         struct attribute_set_obj *sobj;
 755
 756         if (max_members == 0)
 757                 return NULL;
 758
 759         /* Allocates space for implicit NULL at the end too */
 760         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 761                     max_members * sizeof(struct attribute *),
 762                     GFP_KERNEL);
 763         if (!sobj)
 764                 return NULL;
 765         sobj->s.max_members = max_members;
 766         sobj->s.group.attrs = &sobj->a;
 767         sobj->s.group.name = name;
 768
 769         return &sobj->s;
 770 }
 771
 772 #define destroy_attr_set(_set) \
 773         kfree(_set);
 774
 775 /* not multi-threaded safe, use it in a single thread per set */
 776 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 777 {
 778         if (!s || !attr)
 779                 return -EINVAL;
 780
 781         if (s->members >= s->max_members)
 782                 return -ENOMEM;
 783
 784         s->group.attrs[s->members] = attr;
 785         s->members++;
 786
 787         return 0;
 788 }
 789
 790 static int add_many_to_attr_set(struct attribute_set *s,
 791                         struct attribute **attr,
 792                         unsigned int count)
 793 {
 794         int i, res;
 795
 796         for (i = 0; i < count; i++) {
 797                 res = add_to_attr_set(s, attr[i]);
 798                 if (res)
 799                         return res;
 800         }
 801
 802         return 0;
 803 }
 804
 805 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 806 {
 807         sysfs_remove_group(kobj, &s->group);
 808         destroy_attr_set(s);
 809 }
 810
 811 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 812         sysfs_create_group(_kobj, &_attr_set->group)
 813
 814 static int parse_strtoul(const char *buf,
 815                 unsigned long max, unsigned long *value)
 816 {
 817         char *endp;
 818
 819         while (*buf && isspace(*buf))
 820                 buf++;
 821         *value = simple_strtoul(buf, &endp, 0);
 822         while (*endp && isspace(*endp))
 823                 endp++;
 824         if (*endp || *value > max)
 825                 return -EINVAL;
 826
 827         return 0;
 828 }
 829
 830 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 831 {
 832         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 833         union acpi_object *obj;
 834         int rc;
 835
 836         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 837                 obj = (union acpi_object *)buffer.pointer;
 838                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 839                         printk(TPACPI_ERR "Unknown _BCL data, "
 840                                "please report this to %s\n", TPACPI_MAIL);
 841                         rc = 0;
 842                 } else {
 843                         rc = obj->package.count;
 844                 }
 845         } else {
 846                 return 0;
 847         }
 848
 849         kfree(buffer.pointer);
 850         return rc;
 851 }
 852
 853 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 854                                         u32 lvl, void *context, void **rv)
 855 {
 856         char name[ACPI_PATH_SEGMENT_LENGTH];
 857         struct acpi_buffer buffer = { sizeof(name), &name };
 858
 859         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 860             !strncmp("_BCL", name, sizeof(name) - 1)) {
 861                 BUG_ON(!rv || !*rv);
 862                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 863                 return AE_CTRL_TERMINATE;
 864         } else {
 865                 return AE_OK;
 866         }
 867 }
 868
 869 /*
 870  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 871  */
 872 static int __init tpacpi_check_std_acpi_brightness_support(void)
 873 {
 874         int status;
 875         int bcl_levels = 0;
 876         void *bcl_ptr = &bcl_levels;
 877
 878         if (!vid_handle) {
 879                 TPACPI_ACPIHANDLE_INIT(vid);
 880         }
 881         if (!vid_handle)
 882                 return 0;
 883
 884         /*
 885          * Search for a _BCL method, and execute it.  This is safe on all
 886          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 887          * BIOS in ACPI backlight control mode.  We do NOT have to care
 888          * about calling the _BCL method in an enabled video device, any
 889          * will do for our purposes.
 890          */
 891
 892         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 893                                      tpacpi_acpi_walk_find_bcl, NULL,
 894                                      &bcl_ptr);
 895
 896         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 897                 tp_features.bright_acpimode = 1;
 898                 return (bcl_levels - 2);
 899         }
 900
 901         return 0;
 902 }
 903
 904 /*************************************************************************
 905  * thinkpad-acpi driver attributes
 906  */
 907
 908 /* interface_version --------------------------------------------------- */
 909 static ssize_t tpacpi_driver_interface_version_show(
 910                                 struct device_driver *drv,
 911                                 char *buf)
 912 {
 913         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 914 }
 915
 916 static DRIVER_ATTR(interface_version, S_IRUGO,
 917                 tpacpi_driver_interface_version_show, NULL);
 918
 919 /* debug_level --------------------------------------------------------- */
 920 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 921                                                 char *buf)
 922 {
 923         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 924 }
 925
 926 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 927                                                 const char *buf, size_t count)
 928 {
 929         unsigned long t;
 930
 931         if (parse_strtoul(buf, 0xffff, &t))
 932                 return -EINVAL;
 933
 934         dbg_level = t;
 935
 936         return count;
 937 }
 938
 939 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 940                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 941
 942 /* version ------------------------------------------------------------- */
 943 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 944                                                 char *buf)
 945 {
 946         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 947                         TPACPI_DESC, TPACPI_VERSION);
 948 }
 949
 950 static DRIVER_ATTR(version, S_IRUGO,
 951                 tpacpi_driver_version_show, NULL);
 952
 953 /* --------------------------------------------------------------------- */
 954
 955 static struct driver_attribute *tpacpi_driver_attributes[] = {
 956         &driver_attr_debug_level, &driver_attr_version,
 957         &driver_attr_interface_version,
 958 };
 959
 960 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 961 {
 962         int i, res;
 963
 964         i = 0;
 965         res = 0;
 966         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 967                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 968                 i++;
 969         }
 970
 971         return res;
 972 }
 973
 974 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 975 {
 976         int i;
 977
 978         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 979                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 980 }
 981
 982 /****************************************************************************
 983  ****************************************************************************
 984  *
 985  * Subdrivers
 986  *
 987  ****************************************************************************
 988  ****************************************************************************/
 989
 990 /*************************************************************************
 991  * thinkpad-acpi init subdriver
 992  */
 993
 994 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 995 {
 996         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
 997         printk(TPACPI_INFO "%s\n", TPACPI_URL);
 998
 999         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1000                 (thinkpad_id.bios_version_str) ?
1001                         thinkpad_id.bios_version_str : "unknown",
1002                 (thinkpad_id.ec_version_str) ?
1003                         thinkpad_id.ec_version_str : "unknown");
1004
1005         if (thinkpad_id.vendor && thinkpad_id.model_str)
1006                 printk(TPACPI_INFO "%s %s, model %s\n",
1007                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1008                                 "IBM" : ((thinkpad_id.vendor ==
1009                                                 PCI_VENDOR_ID_LENOVO) ?
1010                                         "Lenovo" : "Unknown vendor"),
1011                         thinkpad_id.model_str,
1012                         (thinkpad_id.nummodel_str) ?
1013                                 thinkpad_id.nummodel_str : "unknown");
1014
1015         return 0;
1016 }
1017
1018 static int thinkpad_acpi_driver_read(char *p)
1019 {
1020         int len = 0;
1021
1022         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1023         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1024
1025         return len;
1026 }
1027
1028 static struct ibm_struct thinkpad_acpi_driver_data = {
1029         .name = "driver",
1030         .read = thinkpad_acpi_driver_read,
1031 };
1032
1033 /*************************************************************************
1034  * Hotkey subdriver
1035  */
1036
1037 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1038         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1039         TP_ACPI_HOTKEYSCAN_FNF2,
1040         TP_ACPI_HOTKEYSCAN_FNF3,
1041         TP_ACPI_HOTKEYSCAN_FNF4,
1042         TP_ACPI_HOTKEYSCAN_FNF5,
1043         TP_ACPI_HOTKEYSCAN_FNF6,
1044         TP_ACPI_HOTKEYSCAN_FNF7,
1045         TP_ACPI_HOTKEYSCAN_FNF8,
1046         TP_ACPI_HOTKEYSCAN_FNF9,
1047         TP_ACPI_HOTKEYSCAN_FNF10,
1048         TP_ACPI_HOTKEYSCAN_FNF11,
1049         TP_ACPI_HOTKEYSCAN_FNF12,
1050         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1051         TP_ACPI_HOTKEYSCAN_FNINSERT,
1052         TP_ACPI_HOTKEYSCAN_FNDELETE,
1053         TP_ACPI_HOTKEYSCAN_FNHOME,
1054         TP_ACPI_HOTKEYSCAN_FNEND,
1055         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1056         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1057         TP_ACPI_HOTKEYSCAN_FNSPACE,
1058         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1059         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1060         TP_ACPI_HOTKEYSCAN_MUTE,
1061         TP_ACPI_HOTKEYSCAN_THINKPAD,
1062 };
1063
1064 enum {  /* Keys available through NVRAM polling */
1065         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1066         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1067 };
1068
1069 enum {  /* Positions of some of the keys in hotkey masks */
1070         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1071         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1072         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1073         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1074         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1075         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1076         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1077         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1078         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1079         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1080         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1081 };
1082
1083 enum {  /* NVRAM to ACPI HKEY group map */
1084         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1085                                           TP_ACPI_HKEY_ZOOM_MASK |
1086                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1087                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1088         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1089                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1090         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1091                                           TP_ACPI_HKEY_VOLDWN_MASK |
1092                                           TP_ACPI_HKEY_MUTE_MASK,
1093 };
1094
1095 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1096 struct tp_nvram_state {
1097        u16 thinkpad_toggle:1;
1098        u16 zoom_toggle:1;
1099        u16 display_toggle:1;
1100        u16 thinklight_toggle:1;
1101        u16 hibernate_toggle:1;
1102        u16 displayexp_toggle:1;
1103        u16 display_state:1;
1104        u16 brightness_toggle:1;
1105        u16 volume_toggle:1;
1106        u16 mute:1;
1107
1108        u8 brightness_level;
1109        u8 volume_level;
1110 };
1111
1112 static struct task_struct *tpacpi_hotkey_task;
1113 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1114 static int hotkey_poll_freq = 10;       /* Hz */
1115 static struct mutex hotkey_thread_mutex;
1116 static struct mutex hotkey_thread_data_mutex;
1117 static unsigned int hotkey_config_change;
1118
1119 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1120
1121 #define hotkey_source_mask 0U
1122
1123 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1124
1125 static struct mutex hotkey_mutex;
1126
1127 static enum {   /* Reasons for waking up */
1128         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1129         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1130         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1131 } hotkey_wakeup_reason;
1132
1133 static int hotkey_autosleep_ack;
1134
1135 static int hotkey_orig_status;
1136 static u32 hotkey_orig_mask;
1137 static u32 hotkey_all_mask;
1138 static u32 hotkey_reserved_mask;
1139 static u32 hotkey_mask;
1140
1141 static unsigned int hotkey_report_mode;
1142
1143 static u16 *hotkey_keycode_map;
1144
1145 static struct attribute_set *hotkey_dev_attributes;
1146
1147 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1148 #define HOTKEY_CONFIG_CRITICAL_START \
1149         do { \
1150                 mutex_lock(&hotkey_thread_data_mutex); \
1151                 hotkey_config_change++; \
1152         } while (0);
1153 #define HOTKEY_CONFIG_CRITICAL_END \
1154         mutex_unlock(&hotkey_thread_data_mutex);
1155 #else
1156 #define HOTKEY_CONFIG_CRITICAL_START
1157 #define HOTKEY_CONFIG_CRITICAL_END
1158 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1159
1160 /* HKEY.MHKG() return bits */
1161 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1162
1163 static int hotkey_get_wlsw(int *status)
1164 {
1165         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1166                 return -EIO;
1167         return 0;
1168 }
1169
1170 static int hotkey_get_tablet_mode(int *status)
1171 {
1172         int s;
1173
1174         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1175                 return -EIO;
1176
1177         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1178         return 0;
1179 }
1180
1181 /*
1182  * Call with hotkey_mutex held
1183  */
1184 static int hotkey_mask_get(void)
1185 {
1186         u32 m = 0;
1187
1188         if (tp_features.hotkey_mask) {
1189                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1190                         return -EIO;
1191         }
1192         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1193
1194         return 0;
1195 }
1196
1197 /*
1198  * Call with hotkey_mutex held
1199  */
1200 static int hotkey_mask_set(u32 mask)
1201 {
1202         int i;
1203         int rc = 0;
1204
1205         if (tp_features.hotkey_mask) {
1206                 if (!tp_warned.hotkey_mask_ff &&
1207                     (mask == 0xffff || mask == 0xffffff ||
1208                      mask == 0xffffffff)) {
1209                         tp_warned.hotkey_mask_ff = 1;
1210                         printk(TPACPI_NOTICE
1211                                "setting the hotkey mask to 0x%08x is likely "
1212                                "not the best way to go about it\n", mask);
1213                         printk(TPACPI_NOTICE
1214                                "please consider using the driver defaults, "
1215                                "and refer to up-to-date thinkpad-acpi "
1216                                "documentation\n");
1217                 }
1218
1219                 HOTKEY_CONFIG_CRITICAL_START
1220                 for (i = 0; i < 32; i++) {
1221                         u32 m = 1 << i;
1222                         /* enable in firmware mask only keys not in NVRAM
1223                          * mode, but enable the key in the cached hotkey_mask
1224                          * regardless of mode, or the key will end up
1225                          * disabled by hotkey_mask_get() */
1226                         if (!acpi_evalf(hkey_handle,
1227                                         NULL, "MHKM", "vdd", i + 1,
1228                                         !!((mask & ~hotkey_source_mask) & m))) {
1229                                 rc = -EIO;
1230                                 break;
1231                         } else {
1232                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1233                         }
1234                 }
1235                 HOTKEY_CONFIG_CRITICAL_END
1236
1237                 /* hotkey_mask_get must be called unconditionally below */
1238                 if (!hotkey_mask_get() && !rc &&
1239                     (hotkey_mask & ~hotkey_source_mask) !=
1240                      (mask & ~hotkey_source_mask)) {
1241                         printk(TPACPI_NOTICE
1242                                "requested hot key mask 0x%08x, but "
1243                                "firmware forced it to 0x%08x\n",
1244                                mask, hotkey_mask);
1245                 }
1246         } else {
1247 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1248                 HOTKEY_CONFIG_CRITICAL_START
1249                 hotkey_mask = mask & hotkey_source_mask;
1250                 HOTKEY_CONFIG_CRITICAL_END
1251                 hotkey_mask_get();
1252                 if (hotkey_mask != mask) {
1253                         printk(TPACPI_NOTICE
1254                                "requested hot key mask 0x%08x, "
1255                                "forced to 0x%08x (NVRAM poll mask is "
1256                                "0x%08x): no firmware mask support\n",
1257                                mask, hotkey_mask, hotkey_source_mask);
1258                 }
1259 #else
1260                 hotkey_mask_get();
1261                 rc = -ENXIO;
1262 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1263         }
1264
1265         return rc;
1266 }
1267
1268 static int hotkey_status_get(int *status)
1269 {
1270         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1271                 return -EIO;
1272
1273         return 0;
1274 }
1275
1276 static int hotkey_status_set(int status)
1277 {
1278         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1279                 return -EIO;
1280
1281         return 0;
1282 }
1283
1284 static void tpacpi_input_send_radiosw(void)
1285 {
1286         int wlsw;
1287
1288         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1289                 mutex_lock(&tpacpi_inputdev_send_mutex);
1290
1291                 input_report_switch(tpacpi_inputdev,
1292                                     SW_RADIO, !!wlsw);
1293                 input_sync(tpacpi_inputdev);
1294
1295                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1296         }
1297 }
1298
1299 static void tpacpi_input_send_tabletsw(void)
1300 {
1301         int state;
1302
1303         if (tp_features.hotkey_tablet &&
1304             !hotkey_get_tablet_mode(&state)) {
1305                 mutex_lock(&tpacpi_inputdev_send_mutex);
1306
1307                 input_report_switch(tpacpi_inputdev,
1308                                     SW_TABLET_MODE, !!state);
1309                 input_sync(tpacpi_inputdev);
1310
1311                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1312         }
1313 }
1314
1315 static void tpacpi_input_send_key(unsigned int scancode)
1316 {
1317         unsigned int keycode;
1318
1319         keycode = hotkey_keycode_map[scancode];
1320
1321         if (keycode != KEY_RESERVED) {
1322                 mutex_lock(&tpacpi_inputdev_send_mutex);
1323
1324                 input_report_key(tpacpi_inputdev, keycode, 1);
1325                 if (keycode == KEY_UNKNOWN)
1326                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1327                                     scancode);
1328                 input_sync(tpacpi_inputdev);
1329
1330                 input_report_key(tpacpi_inputdev, keycode, 0);
1331                 if (keycode == KEY_UNKNOWN)
1332                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1333                                     scancode);
1334                 input_sync(tpacpi_inputdev);
1335
1336                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1337         }
1338 }
1339
1340 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1341 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1342
1343 static void tpacpi_hotkey_send_key(unsigned int scancode)
1344 {
1345         tpacpi_input_send_key(scancode);
1346         if (hotkey_report_mode < 2) {
1347                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1348                                                 0x80, 0x1001 + scancode);
1349         }
1350 }
1351
1352 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1353 {
1354         u8 d;
1355
1356         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1357                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1358                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1359                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1360                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1361                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1362         }
1363         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1364                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1365                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1366         }
1367         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1368                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1369                 n->displayexp_toggle =
1370                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1371         }
1372         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1373                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1374                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1375                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1376                 n->brightness_toggle =
1377                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1378         }
1379         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1380                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1381                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1382                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1383                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1384                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1385         }
1386 }
1387
1388 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1389         do { \
1390                 if ((mask & (1 << __scancode)) && \
1391                     oldn->__member != newn->__member) \
1392                 tpacpi_hotkey_send_key(__scancode); \
1393         } while (0)
1394
1395 #define TPACPI_MAY_SEND_KEY(__scancode) \
1396         do { if (mask & (1 << __scancode)) \
1397                 tpacpi_hotkey_send_key(__scancode); } while (0)
1398
1399 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1400                                            struct tp_nvram_state *newn,
1401                                            u32 mask)
1402 {
1403         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1404         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1405         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1406         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1407
1408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1409
1410         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1411
1412         /* handle volume */
1413         if (oldn->volume_toggle != newn->volume_toggle) {
1414                 if (oldn->mute != newn->mute) {
1415                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1416                 }
1417                 if (oldn->volume_level > newn->volume_level) {
1418                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1419                 } else if (oldn->volume_level < newn->volume_level) {
1420                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1421                 } else if (oldn->mute == newn->mute) {
1422                         /* repeated key presses that didn't change state */
1423                         if (newn->mute) {
1424                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1425                         } else if (newn->volume_level != 0) {
1426                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1427                         } else {
1428                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1429                         }
1430                 }
1431         }
1432
1433         /* handle brightness */
1434         if (oldn->brightness_toggle != newn->brightness_toggle) {
1435                 if (oldn->brightness_level < newn->brightness_level) {
1436                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1437                 } else if (oldn->brightness_level > newn->brightness_level) {
1438                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1439                 } else {
1440                         /* repeated key presses that didn't change state */
1441                         if (newn->brightness_level != 0) {
1442                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1443                         } else {
1444                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1445                         }
1446                 }
1447         }
1448 }
1449
1450 #undef TPACPI_COMPARE_KEY
1451 #undef TPACPI_MAY_SEND_KEY
1452
1453 static int hotkey_kthread(void *data)
1454 {
1455         struct tp_nvram_state s[2];
1456         u32 mask;
1457         unsigned int si, so;
1458         unsigned long t;
1459         unsigned int change_detector, must_reset;
1460
1461         mutex_lock(&hotkey_thread_mutex);
1462
1463         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1464                 goto exit;
1465
1466         set_freezable();
1467
1468         so = 0;
1469         si = 1;
1470         t = 0;
1471
1472         /* Initial state for compares */
1473         mutex_lock(&hotkey_thread_data_mutex);
1474         change_detector = hotkey_config_change;
1475         mask = hotkey_source_mask & hotkey_mask;
1476         mutex_unlock(&hotkey_thread_data_mutex);
1477         hotkey_read_nvram(&s[so], mask);
1478
1479         while (!kthread_should_stop() && hotkey_poll_freq) {
1480                 if (t == 0)
1481                         t = 1000/hotkey_poll_freq;
1482                 t = msleep_interruptible(t);
1483                 if (unlikely(kthread_should_stop()))
1484                         break;
1485                 must_reset = try_to_freeze();
1486                 if (t > 0 && !must_reset)
1487                         continue;
1488
1489                 mutex_lock(&hotkey_thread_data_mutex);
1490                 if (must_reset || hotkey_config_change != change_detector) {
1491                         /* forget old state on thaw or config change */
1492                         si = so;
1493                         t = 0;
1494                         change_detector = hotkey_config_change;
1495                 }
1496                 mask = hotkey_source_mask & hotkey_mask;
1497                 mutex_unlock(&hotkey_thread_data_mutex);
1498
1499                 if (likely(mask)) {
1500                         hotkey_read_nvram(&s[si], mask);
1501                         if (likely(si != so)) {
1502                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1503                                                                 mask);
1504                         }
1505                 }
1506
1507                 so = si;
1508                 si ^= 1;
1509         }
1510
1511 exit:
1512         mutex_unlock(&hotkey_thread_mutex);
1513         return 0;
1514 }
1515
1516 static void hotkey_poll_stop_sync(void)
1517 {
1518         if (tpacpi_hotkey_task) {
1519                 if (frozen(tpacpi_hotkey_task) ||
1520                     freezing(tpacpi_hotkey_task))
1521                         thaw_process(tpacpi_hotkey_task);
1522
1523                 kthread_stop(tpacpi_hotkey_task);
1524                 tpacpi_hotkey_task = NULL;
1525                 mutex_lock(&hotkey_thread_mutex);
1526                 /* at this point, the thread did exit */
1527                 mutex_unlock(&hotkey_thread_mutex);
1528         }
1529 }
1530
1531 /* call with hotkey_mutex held */
1532 static void hotkey_poll_setup(int may_warn)
1533 {
1534         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1535             hotkey_poll_freq > 0 &&
1536             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1537                 if (!tpacpi_hotkey_task) {
1538                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1539                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1540                         if (IS_ERR(tpacpi_hotkey_task)) {
1541                                 tpacpi_hotkey_task = NULL;
1542                                 printk(TPACPI_ERR
1543                                        "could not create kernel thread "
1544                                        "for hotkey polling\n");
1545                         }
1546                 }
1547         } else {
1548                 hotkey_poll_stop_sync();
1549                 if (may_warn &&
1550                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1551                         printk(TPACPI_NOTICE
1552                                 "hot keys 0x%08x require polling, "
1553                                 "which is currently disabled\n",
1554                                 hotkey_source_mask);
1555                 }
1556         }
1557 }
1558
1559 static void hotkey_poll_setup_safe(int may_warn)
1560 {
1561         mutex_lock(&hotkey_mutex);
1562         hotkey_poll_setup(may_warn);
1563         mutex_unlock(&hotkey_mutex);
1564 }
1565
1566 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1567
1568 static void hotkey_poll_setup_safe(int __unused)
1569 {
1570 }
1571
1572 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1573
1574 static int hotkey_inputdev_open(struct input_dev *dev)
1575 {
1576         switch (tpacpi_lifecycle) {
1577         case TPACPI_LIFE_INIT:
1578                 /*
1579                  * hotkey_init will call hotkey_poll_setup_safe
1580                  * at the appropriate moment
1581                  */
1582                 return 0;
1583         case TPACPI_LIFE_EXITING:
1584                 return -EBUSY;
1585         case TPACPI_LIFE_RUNNING:
1586                 hotkey_poll_setup_safe(0);
1587                 return 0;
1588         }
1589
1590         /* Should only happen if tpacpi_lifecycle is corrupt */
1591         BUG();
1592         return -EBUSY;
1593 }
1594
1595 static void hotkey_inputdev_close(struct input_dev *dev)
1596 {
1597         /* disable hotkey polling when possible */
1598         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1599                 hotkey_poll_setup_safe(0);
1600 }
1601
1602 /* sysfs hotkey enable ------------------------------------------------- */
1603 static ssize_t hotkey_enable_show(struct device *dev,
1604                            struct device_attribute *attr,
1605                            char *buf)
1606 {
1607         int res, status;
1608
1609         res = hotkey_status_get(&status);
1610         if (res)
1611                 return res;
1612
1613         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1614 }
1615
1616 static ssize_t hotkey_enable_store(struct device *dev,
1617                             struct device_attribute *attr,
1618                             const char *buf, size_t count)
1619 {
1620         unsigned long t;
1621         int res;
1622
1623         if (parse_strtoul(buf, 1, &t))
1624                 return -EINVAL;
1625
1626         res = hotkey_status_set(t);
1627
1628         return (res) ? res : count;
1629 }
1630
1631 static struct device_attribute dev_attr_hotkey_enable =
1632         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1633                 hotkey_enable_show, hotkey_enable_store);
1634
1635 /* sysfs hotkey mask --------------------------------------------------- */
1636 static ssize_t hotkey_mask_show(struct device *dev,
1637                            struct device_attribute *attr,
1638                            char *buf)
1639 {
1640         int res;
1641
1642         if (mutex_lock_interruptible(&hotkey_mutex))
1643                 return -ERESTARTSYS;
1644         res = hotkey_mask_get();
1645         mutex_unlock(&hotkey_mutex);
1646
1647         return (res)?
1648                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1649 }
1650
1651 static ssize_t hotkey_mask_store(struct device *dev,
1652                             struct device_attribute *attr,
1653                             const char *buf, size_t count)
1654 {
1655         unsigned long t;
1656         int res;
1657
1658         if (parse_strtoul(buf, 0xffffffffUL, &t))
1659                 return -EINVAL;
1660
1661         if (mutex_lock_interruptible(&hotkey_mutex))
1662                 return -ERESTARTSYS;
1663
1664         res = hotkey_mask_set(t);
1665
1666 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1667         hotkey_poll_setup(1);
1668 #endif
1669
1670         mutex_unlock(&hotkey_mutex);
1671
1672         return (res) ? res : count;
1673 }
1674
1675 static struct device_attribute dev_attr_hotkey_mask =
1676         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1677                 hotkey_mask_show, hotkey_mask_store);
1678
1679 /* sysfs hotkey bios_enabled ------------------------------------------- */
1680 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1681                            struct device_attribute *attr,
1682                            char *buf)
1683 {
1684         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1685 }
1686
1687 static struct device_attribute dev_attr_hotkey_bios_enabled =
1688         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1689
1690 /* sysfs hotkey bios_mask ---------------------------------------------- */
1691 static ssize_t hotkey_bios_mask_show(struct device *dev,
1692                            struct device_attribute *attr,
1693                            char *buf)
1694 {
1695         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1696 }
1697
1698 static struct device_attribute dev_attr_hotkey_bios_mask =
1699         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1700
1701 /* sysfs hotkey all_mask ----------------------------------------------- */
1702 static ssize_t hotkey_all_mask_show(struct device *dev,
1703                            struct device_attribute *attr,
1704                            char *buf)
1705 {
1706         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1707                                 hotkey_all_mask | hotkey_source_mask);
1708 }
1709
1710 static struct device_attribute dev_attr_hotkey_all_mask =
1711         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1712
1713 /* sysfs hotkey recommended_mask --------------------------------------- */
1714 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1715                                             struct device_attribute *attr,
1716                                             char *buf)
1717 {
1718         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1719                         (hotkey_all_mask | hotkey_source_mask)
1720                         & ~hotkey_reserved_mask);
1721 }
1722
1723 static struct device_attribute dev_attr_hotkey_recommended_mask =
1724         __ATTR(hotkey_recommended_mask, S_IRUGO,
1725                 hotkey_recommended_mask_show, NULL);
1726
1727 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1728
1729 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1730 static ssize_t hotkey_source_mask_show(struct device *dev,
1731                            struct device_attribute *attr,
1732                            char *buf)
1733 {
1734         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1735 }
1736
1737 static ssize_t hotkey_source_mask_store(struct device *dev,
1738                             struct device_attribute *attr,
1739                             const char *buf, size_t count)
1740 {
1741         unsigned long t;
1742
1743         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1744                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1745                 return -EINVAL;
1746
1747         if (mutex_lock_interruptible(&hotkey_mutex))
1748                 return -ERESTARTSYS;
1749
1750         HOTKEY_CONFIG_CRITICAL_START
1751         hotkey_source_mask = t;
1752         HOTKEY_CONFIG_CRITICAL_END
1753
1754         hotkey_poll_setup(1);
1755
1756         mutex_unlock(&hotkey_mutex);
1757
1758         return count;
1759 }
1760
1761 static struct device_attribute dev_attr_hotkey_source_mask =
1762         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1763                 hotkey_source_mask_show, hotkey_source_mask_store);
1764
1765 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1766 static ssize_t hotkey_poll_freq_show(struct device *dev,
1767                            struct device_attribute *attr,
1768                            char *buf)
1769 {
1770         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1771 }
1772
1773 static ssize_t hotkey_poll_freq_store(struct device *dev,
1774                             struct device_attribute *attr,
1775                             const char *buf, size_t count)
1776 {
1777         unsigned long t;
1778
1779         if (parse_strtoul(buf, 25, &t))
1780                 return -EINVAL;
1781
1782         if (mutex_lock_interruptible(&hotkey_mutex))
1783                 return -ERESTARTSYS;
1784
1785         hotkey_poll_freq = t;
1786
1787         hotkey_poll_setup(1);
1788         mutex_unlock(&hotkey_mutex);
1789
1790         return count;
1791 }
1792
1793 static struct device_attribute dev_attr_hotkey_poll_freq =
1794         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1795                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1796
1797 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1798
1799 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1800 static ssize_t hotkey_radio_sw_show(struct device *dev,
1801                            struct device_attribute *attr,
1802                            char *buf)
1803 {
1804         int res, s;
1805         res = hotkey_get_wlsw(&s);
1806         if (res < 0)
1807                 return res;
1808
1809         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1810 }
1811
1812 static struct device_attribute dev_attr_hotkey_radio_sw =
1813         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1814
1815 static void hotkey_radio_sw_notify_change(void)
1816 {
1817         if (tp_features.hotkey_wlsw)
1818                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1819                              "hotkey_radio_sw");
1820 }
1821
1822 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1823 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1824                            struct device_attribute *attr,
1825                            char *buf)
1826 {
1827         int res, s;
1828         res = hotkey_get_tablet_mode(&s);
1829         if (res < 0)
1830                 return res;
1831
1832         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1833 }
1834
1835 static struct device_attribute dev_attr_hotkey_tablet_mode =
1836         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1837
1838 static void hotkey_tablet_mode_notify_change(void)
1839 {
1840         if (tp_features.hotkey_tablet)
1841                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1842                              "hotkey_tablet_mode");
1843 }
1844
1845 /* sysfs hotkey report_mode -------------------------------------------- */
1846 static ssize_t hotkey_report_mode_show(struct device *dev,
1847                            struct device_attribute *attr,
1848                            char *buf)
1849 {
1850         return snprintf(buf, PAGE_SIZE, "%d\n",
1851                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1852 }
1853
1854 static struct device_attribute dev_attr_hotkey_report_mode =
1855         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1856
1857 /* sysfs wakeup reason (pollable) -------------------------------------- */
1858 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1859                            struct device_attribute *attr,
1860                            char *buf)
1861 {
1862         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1863 }
1864
1865 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1866         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1867
1868 static void hotkey_wakeup_reason_notify_change(void)
1869 {
1870         if (tp_features.hotkey_mask)
1871                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1872                              "wakeup_reason");
1873 }
1874
1875 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1876 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1877                            struct device_attribute *attr,
1878                            char *buf)
1879 {
1880         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1881 }
1882
1883 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1884         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1885                hotkey_wakeup_hotunplug_complete_show, NULL);
1886
1887 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1888 {
1889         if (tp_features.hotkey_mask)
1890                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1891                              "wakeup_hotunplug_complete");
1892 }
1893
1894 /* --------------------------------------------------------------------- */
1895
1896 static struct attribute *hotkey_attributes[] __initdata = {
1897         &dev_attr_hotkey_enable.attr,
1898         &dev_attr_hotkey_bios_enabled.attr,
1899         &dev_attr_hotkey_report_mode.attr,
1900 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1901         &dev_attr_hotkey_mask.attr,
1902         &dev_attr_hotkey_all_mask.attr,
1903         &dev_attr_hotkey_recommended_mask.attr,
1904         &dev_attr_hotkey_source_mask.attr,
1905         &dev_attr_hotkey_poll_freq.attr,
1906 #endif
1907 };
1908
1909 static struct attribute *hotkey_mask_attributes[] __initdata = {
1910         &dev_attr_hotkey_bios_mask.attr,
1911 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1912         &dev_attr_hotkey_mask.attr,
1913         &dev_attr_hotkey_all_mask.attr,
1914         &dev_attr_hotkey_recommended_mask.attr,
1915 #endif
1916         &dev_attr_hotkey_wakeup_reason.attr,
1917         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1918 };
1919
1920 static int __init hotkey_init(struct ibm_init_struct *iibm)
1921 {
1922         /* Requirements for changing the default keymaps:
1923          *
1924          * 1. Many of the keys are mapped to KEY_RESERVED for very
1925          *    good reasons.  Do not change them unless you have deep
1926          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1927          *    the various ThinkPad models.  The driver behaves
1928          *    differently for KEY_RESERVED: such keys have their
1929          *    hot key mask *unset* in mask_recommended, and also
1930          *    in the initial hot key mask programmed into the
1931          *    firmware at driver load time, which means the firm-
1932          *    ware may react very differently if you change them to
1933          *    something else;
1934          *
1935          * 2. You must be subscribed to the linux-thinkpad and
1936          *    ibm-acpi-devel mailing lists, and you should read the
1937          *    list archives since 2007 if you want to change the
1938          *    keymaps.  This requirement exists so that you will
1939          *    know the past history of problems with the thinkpad-
1940          *    acpi driver keymaps, and also that you will be
1941          *    listening to any bug reports;
1942          *
1943          * 3. Do not send thinkpad-acpi specific patches directly to
1944          *    for merging, *ever*.  Send them to the linux-acpi
1945          *    mailinglist for comments.  Merging is to be done only
1946          *    through acpi-test and the ACPI maintainer.
1947          *
1948          * If the above is too much to ask, don't change the keymap.
1949          * Ask the thinkpad-acpi maintainer to do it, instead.
1950          */
1951         static u16 ibm_keycode_map[] __initdata = {
1952                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1953                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1954                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1955                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1956
1957                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1958                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1959                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1960                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1961
1962                 /* brightness: firmware always reacts to them, unless
1963                  * X.org did some tricks in the radeon BIOS scratch
1964                  * registers of *some* models */
1965                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1966                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1967
1968                 /* Thinklight: firmware always react to it */
1969                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1970
1971                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1972                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1973
1974                 /* Volume: firmware always react to it and reprograms
1975                  * the built-in *extra* mixer.  Never map it to control
1976                  * another mixer by default. */
1977                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1978                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1979                 KEY_RESERVED,   /* 0x16: MUTE */
1980
1981                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1982
1983                 /* (assignments unknown, please report if found) */
1984                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1985                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1986         };
1987         static u16 lenovo_keycode_map[] __initdata = {
1988                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1989                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1990                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1991                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1992
1993                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1994                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1995                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1996                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1997
1998                 /* These either have to go through ACPI video, or
1999                  * act like in the IBM ThinkPads, so don't ever
2000                  * enable them by default */
2001                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2002                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2003
2004                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2005
2006                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2007                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2008
2009                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2010                  * react to it and reprograms the built-in *extra* mixer.
2011                  * Never map it to control another mixer by default.
2012                  *
2013                  * T60?, T61, R60?, R61: firmware and EC tries to send
2014                  * these over the regular keyboard, so these are no-ops,
2015                  * but there are still weird bugs re. MUTE, so do not
2016                  * change unless you get test reports from all Lenovo
2017                  * models.  May cause the BIOS to interfere with the
2018                  * HDA mixer.
2019                  */
2020                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2021                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2022                 KEY_RESERVED,   /* 0x16: MUTE */
2023
2024                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2025
2026                 /* (assignments unknown, please report if found) */
2027                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2028                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2029         };
2030
2031 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2032 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2033 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2034
2035         int res, i;
2036         int status;
2037         int hkeyv;
2038
2039         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2040
2041         BUG_ON(!tpacpi_inputdev);
2042         BUG_ON(tpacpi_inputdev->open != NULL ||
2043                tpacpi_inputdev->close != NULL);
2044
2045         TPACPI_ACPIHANDLE_INIT(hkey);
2046         mutex_init(&hotkey_mutex);
2047
2048 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2049         mutex_init(&hotkey_thread_mutex);
2050         mutex_init(&hotkey_thread_data_mutex);
2051 #endif
2052
2053         /* hotkey not supported on 570 */
2054         tp_features.hotkey = hkey_handle != NULL;
2055
2056         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2057                 str_supported(tp_features.hotkey));
2058
2059         if (tp_features.hotkey) {
2060                 hotkey_dev_attributes = create_attr_set(13, NULL);
2061                 if (!hotkey_dev_attributes)
2062                         return -ENOMEM;
2063                 res = add_many_to_attr_set(hotkey_dev_attributes,
2064                                 hotkey_attributes,
2065                                 ARRAY_SIZE(hotkey_attributes));
2066                 if (res)
2067                         return res;
2068
2069                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2070                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2071                    for HKEY interface version 0x100 */
2072                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2073                         if ((hkeyv >> 8) != 1) {
2074                                 printk(TPACPI_ERR "unknown version of the "
2075                                        "HKEY interface: 0x%x\n", hkeyv);
2076                                 printk(TPACPI_ERR "please report this to %s\n",
2077                                        TPACPI_MAIL);
2078                         } else {
2079                                 /*
2080                                  * MHKV 0x100 in A31, R40, R40e,
2081                                  * T4x, X31, and later
2082                                  */
2083                                 tp_features.hotkey_mask = 1;
2084                         }
2085                 }
2086
2087                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2088                         str_supported(tp_features.hotkey_mask));
2089
2090                 if (tp_features.hotkey_mask) {
2091                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2092                                         "MHKA", "qd")) {
2093                                 printk(TPACPI_ERR
2094                                        "missing MHKA handler, "
2095                                        "please report this to %s\n",
2096                                        TPACPI_MAIL);
2097                                 /* FN+F12, FN+F4, FN+F3 */
2098                                 hotkey_all_mask = 0x080cU;
2099                         }
2100                 }
2101
2102                 /* hotkey_source_mask *must* be zero for
2103                  * the first hotkey_mask_get */
2104                 res = hotkey_status_get(&hotkey_orig_status);
2105                 if (!res && tp_features.hotkey_mask) {
2106                         res = hotkey_mask_get();
2107                         hotkey_orig_mask = hotkey_mask;
2108                         if (!res) {
2109                                 res = add_many_to_attr_set(
2110                                         hotkey_dev_attributes,
2111                                         hotkey_mask_attributes,
2112                                         ARRAY_SIZE(hotkey_mask_attributes));
2113                         }
2114                 }
2115
2116 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2117                 if (tp_features.hotkey_mask) {
2118                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2119                                                 & ~hotkey_all_mask;
2120                 } else {
2121                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2122                 }
2123
2124                 vdbg_printk(TPACPI_DBG_INIT,
2125                             "hotkey source mask 0x%08x, polling freq %d\n",
2126                             hotkey_source_mask, hotkey_poll_freq);
2127 #endif
2128
2129                 /* Not all thinkpads have a hardware radio switch */
2130                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2131                         tp_features.hotkey_wlsw = 1;
2132                         printk(TPACPI_INFO
2133                                 "radio switch found; radios are %s\n",
2134                                 enabled(status, 0));
2135                         res = add_to_attr_set(hotkey_dev_attributes,
2136                                         &dev_attr_hotkey_radio_sw.attr);
2137                 }
2138
2139                 /* For X41t, X60t, X61t Tablets... */
2140                 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2141                         tp_features.hotkey_tablet = 1;
2142                         printk(TPACPI_INFO
2143                                 "possible tablet mode switch found; "
2144                                 "ThinkPad in %s mode\n",
2145                                 (status & TP_HOTKEY_TABLET_MASK)?
2146                                         "tablet" : "laptop");
2147                         res = add_to_attr_set(hotkey_dev_attributes,
2148                                         &dev_attr_hotkey_tablet_mode.attr);
2149                 }
2150
2151                 if (!res)
2152                         res = register_attr_set_with_sysfs(
2153                                         hotkey_dev_attributes,
2154                                         &tpacpi_pdev->dev.kobj);
2155                 if (res)
2156                         return res;
2157
2158                 /* Set up key map */
2159
2160                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2161                                                 GFP_KERNEL);
2162                 if (!hotkey_keycode_map) {
2163                         printk(TPACPI_ERR
2164                                 "failed to allocate memory for key map\n");
2165                         return -ENOMEM;
2166                 }
2167
2168                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2169                         dbg_printk(TPACPI_DBG_INIT,
2170                                    "using Lenovo default hot key map\n");
2171                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2172                                 TPACPI_HOTKEY_MAP_SIZE);
2173                 } else {
2174                         dbg_printk(TPACPI_DBG_INIT,
2175                                    "using IBM default hot key map\n");
2176                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
2177                                 TPACPI_HOTKEY_MAP_SIZE);
2178                 }
2179
2180                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2181                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2182                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2183                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2184                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2185                 tpacpi_inputdev->keycode = hotkey_keycode_map;
2186                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2187                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
2188                                 set_bit(hotkey_keycode_map[i],
2189                                         tpacpi_inputdev->keybit);
2190                         } else {
2191                                 if (i < sizeof(hotkey_reserved_mask)*8)
2192                                         hotkey_reserved_mask |= 1 << i;
2193                         }
2194                 }
2195
2196                 if (tp_features.hotkey_wlsw) {
2197                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2198                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2199                 }
2200                 if (tp_features.hotkey_tablet) {
2201                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2202                         set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2203                 }
2204
2205                 /* Do not issue duplicate brightness change events to
2206                  * userspace */
2207                 if (!tp_features.bright_acpimode)
2208                         /* update bright_acpimode... */
2209                         tpacpi_check_std_acpi_brightness_support();
2210
2211                 if (tp_features.bright_acpimode) {
2212                         printk(TPACPI_INFO
2213                                "This ThinkPad has standard ACPI backlight "
2214                                "brightness control, supported by the ACPI "
2215                                "video driver\n");
2216                         printk(TPACPI_NOTICE
2217                                "Disabling thinkpad-acpi brightness events "
2218                                "by default...\n");
2219
2220                         /* The hotkey_reserved_mask change below is not
2221                          * necessary while the keys are at KEY_RESERVED in the
2222                          * default map, but better safe than sorry, leave it
2223                          * here as a marker of what we have to do, especially
2224                          * when we finally become able to set this at runtime
2225                          * on response to X.org requests */
2226                         hotkey_reserved_mask |=
2227                                 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2228                                 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2229                 }
2230
2231                 dbg_printk(TPACPI_DBG_INIT,
2232                                 "enabling hot key handling\n");
2233                 res = hotkey_status_set(1);
2234                 if (res)
2235                         return res;
2236                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2237                                         & ~hotkey_reserved_mask)
2238                                         | hotkey_orig_mask);
2239                 if (res < 0 && res != -ENXIO)
2240                         return res;
2241
2242                 dbg_printk(TPACPI_DBG_INIT,
2243                                 "legacy hot key reporting over procfs %s\n",
2244                                 (hotkey_report_mode < 2) ?
2245                                         "enabled" : "disabled");
2246
2247                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2248                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2249
2250                 hotkey_poll_setup_safe(1);
2251                 tpacpi_input_send_radiosw();
2252                 tpacpi_input_send_tabletsw();
2253         }
2254
2255         return (tp_features.hotkey)? 0 : 1;
2256 }
2257
2258 static void hotkey_exit(void)
2259 {
2260 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2261         hotkey_poll_stop_sync();
2262 #endif
2263
2264         if (tp_features.hotkey) {
2265                 dbg_printk(TPACPI_DBG_EXIT,
2266                            "restoring original hot key mask\n");
2267                 /* no short-circuit boolean operator below! */
2268                 if ((hotkey_mask_set(hotkey_orig_mask) |
2269                      hotkey_status_set(hotkey_orig_status)) != 0)
2270                         printk(TPACPI_ERR
2271                                "failed to restore hot key mask "
2272                                "to BIOS defaults\n");
2273         }
2274
2275         if (hotkey_dev_attributes) {
2276                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2277                 hotkey_dev_attributes = NULL;
2278         }
2279 }
2280
2281 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2282 {
2283         u32 hkey;
2284         unsigned int scancode;
2285         int send_acpi_ev;
2286         int ignore_acpi_ev;
2287         int unk_ev;
2288
2289         if (event != 0x80) {
2290                 printk(TPACPI_ERR
2291                        "unknown HKEY notification event %d\n", event);
2292                 /* forward it to userspace, maybe it knows how to handle it */
2293                 acpi_bus_generate_netlink_event(
2294                                         ibm->acpi->device->pnp.device_class,
2295                                         ibm->acpi->device->dev.bus_id,
2296                                         event, 0);
2297                 return;
2298         }
2299
2300         while (1) {
2301                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2302                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2303                         return;
2304                 }
2305
2306                 if (hkey == 0) {
2307                         /* queue empty */
2308                         return;
2309                 }
2310
2311                 send_acpi_ev = 1;
2312                 ignore_acpi_ev = 0;
2313                 unk_ev = 0;
2314
2315                 switch (hkey >> 12) {
2316                 case 1:
2317                         /* 0x1000-0x1FFF: key presses */
2318                         scancode = hkey & 0xfff;
2319                         if (scancode > 0 && scancode < 0x21) {
2320                                 scancode--;
2321                                 if (!(hotkey_source_mask & (1 << scancode))) {
2322                                         tpacpi_input_send_key(scancode);
2323                                         send_acpi_ev = 0;
2324                                 } else {
2325                                         ignore_acpi_ev = 1;
2326                                 }
2327                         } else {
2328                                 unk_ev = 1;
2329                         }
2330                         break;
2331                 case 2:
2332                         /* Wakeup reason */
2333                         switch (hkey) {
2334                         case 0x2304: /* suspend, undock */
2335                         case 0x2404: /* hibernation, undock */
2336                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2337                                 ignore_acpi_ev = 1;
2338                                 break;
2339                         case 0x2305: /* suspend, bay eject */
2340                         case 0x2405: /* hibernation, bay eject */
2341                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2342                                 ignore_acpi_ev = 1;
2343                                 break;
2344                         default:
2345                                 unk_ev = 1;
2346                         }
2347                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2348                                 printk(TPACPI_INFO
2349                                        "woke up due to a hot-unplug "
2350                                        "request...\n");
2351                                 hotkey_wakeup_reason_notify_change();
2352                         }
2353                         break;
2354                 case 3:
2355                         /* bay-related wakeups */
2356                         if (hkey == 0x3003) {
2357                                 hotkey_autosleep_ack = 1;
2358                                 printk(TPACPI_INFO
2359                                        "bay ejected\n");
2360                                 hotkey_wakeup_hotunplug_complete_notify_change();
2361                         } else {
2362                                 unk_ev = 1;
2363                         }
2364                         break;
2365                 case 4:
2366                         /* dock-related wakeups */
2367                         if (hkey == 0x4003) {
2368                                 hotkey_autosleep_ack = 1;
2369                                 printk(TPACPI_INFO
2370                                        "undocked\n");
2371                                 hotkey_wakeup_hotunplug_complete_notify_change();
2372                         } else {
2373                                 unk_ev = 1;
2374                         }
2375                         break;
2376                 case 5:
2377                         /* 0x5000-0x5FFF: human interface helpers */
2378                         switch (hkey) {
2379                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2380                         case 0x500b: /* X61t: tablet pen inserted into bay */
2381                         case 0x500c: /* X61t: tablet pen removed from bay */
2382                                 break;
2383                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2384                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2385                                 tpacpi_input_send_tabletsw();
2386                                 hotkey_tablet_mode_notify_change();
2387                                 send_acpi_ev = 0;
2388                                 break;
2389                         case 0x5001:
2390                         case 0x5002:
2391                                 /* LID switch events.  Do not propagate */
2392                                 ignore_acpi_ev = 1;
2393                                 break;
2394                         default:
2395                                 unk_ev = 1;
2396                         }
2397                         break;
2398                 case 7:
2399                         /* 0x7000-0x7FFF: misc */
2400                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2401                                 tpacpi_input_send_radiosw();
2402                                 hotkey_radio_sw_notify_change();
2403                                 send_acpi_ev = 0;
2404                                 break;
2405                         }
2406                         /* fallthrough to default */
2407                 default:
2408                         unk_ev = 1;
2409                 }
2410                 if (unk_ev) {
2411                         printk(TPACPI_NOTICE
2412                                "unhandled HKEY event 0x%04x\n", hkey);
2413                 }
2414
2415                 /* Legacy events */
2416                 if (!ignore_acpi_ev &&
2417                     (send_acpi_ev || hotkey_report_mode < 2)) {
2418                         acpi_bus_generate_proc_event(ibm->acpi->device,
2419                                                      event, hkey);
2420                 }
2421
2422                 /* netlink events */
2423                 if (!ignore_acpi_ev && send_acpi_ev) {
2424                         acpi_bus_generate_netlink_event(
2425                                         ibm->acpi->device->pnp.device_class,
2426                                         ibm->acpi->device->dev.bus_id,
2427                                         event, hkey);
2428                 }
2429         }
2430 }
2431
2432 static void hotkey_suspend(pm_message_t state)
2433 {
2434         /* Do these on suspend, we get the events on early resume! */
2435         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2436         hotkey_autosleep_ack = 0;
2437 }
2438
2439 static void hotkey_resume(void)
2440 {
2441         if (hotkey_mask_get())
2442                 printk(TPACPI_ERR
2443                        "error while trying to read hot key mask "
2444                        "from firmware\n");
2445         tpacpi_input_send_radiosw();
2446         hotkey_radio_sw_notify_change();
2447         hotkey_tablet_mode_notify_change();
2448         hotkey_wakeup_reason_notify_change();
2449         hotkey_wakeup_hotunplug_complete_notify_change();
2450         hotkey_poll_setup_safe(0);
2451 }
2452
2453 /* procfs -------------------------------------------------------------- */
2454 static int hotkey_read(char *p)
2455 {
2456         int res, status;
2457         int len = 0;
2458
2459         if (!tp_features.hotkey) {
2460                 len += sprintf(p + len, "status:\t\tnot supported\n");
2461                 return len;
2462         }
2463
2464         if (mutex_lock_interruptible(&hotkey_mutex))
2465                 return -ERESTARTSYS;
2466         res = hotkey_status_get(&status);
2467         if (!res)
2468                 res = hotkey_mask_get();
2469         mutex_unlock(&hotkey_mutex);
2470         if (res)
2471                 return res;
2472
2473         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2474         if (tp_features.hotkey_mask) {
2475                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2476                 len += sprintf(p + len,
2477                                "commands:\tenable, disable, reset, <mask>\n");
2478         } else {
2479                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2480                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2481         }
2482
2483         return len;
2484 }
2485
2486 static int hotkey_write(char *buf)
2487 {
2488         int res, status;
2489         u32 mask;
2490         char *cmd;
2491
2492         if (!tp_features.hotkey)
2493                 return -ENODEV;
2494
2495         if (mutex_lock_interruptible(&hotkey_mutex))
2496                 return -ERESTARTSYS;
2497
2498         status = -1;
2499         mask = hotkey_mask;
2500
2501         res = 0;
2502         while ((cmd = next_cmd(&buf))) {
2503                 if (strlencmp(cmd, "enable") == 0) {
2504                         status = 1;
2505                 } else if (strlencmp(cmd, "disable") == 0) {
2506                         status = 0;
2507                 } else if (strlencmp(cmd, "reset") == 0) {
2508                         status = hotkey_orig_status;
2509                         mask = hotkey_orig_mask;
2510                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2511                         /* mask set */
2512                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2513                         /* mask set */
2514                 } else {
2515                         res = -EINVAL;
2516                         goto errexit;
2517                 }
2518         }
2519         if (status != -1)
2520                 res = hotkey_status_set(status);
2521
2522         if (!res && mask != hotkey_mask)
2523                 res = hotkey_mask_set(mask);
2524
2525 errexit:
2526         mutex_unlock(&hotkey_mutex);
2527         return res;
2528 }
2529
2530 static const struct acpi_device_id ibm_htk_device_ids[] = {
2531         {TPACPI_ACPI_HKEY_HID, 0},
2532         {"", 0},
2533 };
2534
2535 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2536         .hid = ibm_htk_device_ids,
2537         .notify = hotkey_notify,
2538         .handle = &hkey_handle,
2539         .type = ACPI_DEVICE_NOTIFY,
2540 };
2541
2542 static struct ibm_struct hotkey_driver_data = {
2543         .name = "hotkey",
2544         .read = hotkey_read,
2545         .write = hotkey_write,
2546         .exit = hotkey_exit,
2547         .resume = hotkey_resume,
2548         .suspend = hotkey_suspend,
2549         .acpi = &ibm_hotkey_acpidriver,
2550 };
2551
2552 /*************************************************************************
2553  * Bluetooth subdriver
2554  */
2555
2556 enum {
2557         /* ACPI GBDC/SBDC bits */
2558         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2559         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2560         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2561 };
2562
2563 static int bluetooth_get_radiosw(void);
2564 static int bluetooth_set_radiosw(int radio_on);
2565
2566 /* sysfs bluetooth enable ---------------------------------------------- */
2567 static ssize_t bluetooth_enable_show(struct device *dev,
2568                            struct device_attribute *attr,
2569                            char *buf)
2570 {
2571         int status;
2572
2573         status = bluetooth_get_radiosw();
2574         if (status < 0)
2575                 return status;
2576
2577         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2578 }
2579
2580 static ssize_t bluetooth_enable_store(struct device *dev,
2581                             struct device_attribute *attr,
2582                             const char *buf, size_t count)
2583 {
2584         unsigned long t;
2585         int res;
2586
2587         if (parse_strtoul(buf, 1, &t))
2588                 return -EINVAL;
2589
2590         res = bluetooth_set_radiosw(t);
2591
2592         return (res) ? res : count;
2593 }
2594
2595 static struct device_attribute dev_attr_bluetooth_enable =
2596         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2597                 bluetooth_enable_show, bluetooth_enable_store);
2598
2599 /* --------------------------------------------------------------------- */
2600
2601 static struct attribute *bluetooth_attributes[] = {
2602         &dev_attr_bluetooth_enable.attr,
2603         NULL
2604 };
2605
2606 static const struct attribute_group bluetooth_attr_group = {
2607         .attrs = bluetooth_attributes,
2608 };
2609
2610 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2611 {
2612         int res;
2613         int status = 0;
2614
2615         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2616
2617         TPACPI_ACPIHANDLE_INIT(hkey);
2618
2619         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2620            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2621         tp_features.bluetooth = hkey_handle &&
2622             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2623
2624         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2625                 str_supported(tp_features.bluetooth),
2626                 status);
2627
2628         if (tp_features.bluetooth) {
2629                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2630                         /* no bluetooth hardware present in system */
2631                         tp_features.bluetooth = 0;
2632                         dbg_printk(TPACPI_DBG_INIT,
2633                                    "bluetooth hardware not installed\n");
2634                 } else {
2635                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2636                                         &bluetooth_attr_group);
2637                         if (res)
2638                                 return res;
2639                 }
2640         }
2641
2642         return (tp_features.bluetooth)? 0 : 1;
2643 }
2644
2645 static void bluetooth_exit(void)
2646 {
2647         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2648                         &bluetooth_attr_group);
2649 }
2650
2651 static int bluetooth_get_radiosw(void)
2652 {
2653         int status;
2654
2655         if (!tp_features.bluetooth)
2656                 return -ENODEV;
2657
2658         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2659                 return -EIO;
2660
2661         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2662 }
2663
2664 static int bluetooth_set_radiosw(int radio_on)
2665 {
2666         int status;
2667
2668         if (!tp_features.bluetooth)
2669                 return -ENODEV;
2670
2671         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2672                 return -EIO;
2673         if (radio_on)
2674                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2675         else
2676                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2677         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2678                 return -EIO;
2679
2680         return 0;
2681 }
2682
2683 /* procfs -------------------------------------------------------------- */
2684 static int bluetooth_read(char *p)
2685 {
2686         int len = 0;
2687         int status = bluetooth_get_radiosw();
2688
2689         if (!tp_features.bluetooth)
2690                 len += sprintf(p + len, "status:\t\tnot supported\n");
2691         else {
2692                 len += sprintf(p + len, "status:\t\t%s\n",
2693                                 (status)? "enabled" : "disabled");
2694                 len += sprintf(p + len, "commands:\tenable, disable\n");
2695         }
2696
2697         return len;
2698 }
2699
2700 static int bluetooth_write(char *buf)
2701 {
2702         char *cmd;
2703
2704         if (!tp_features.bluetooth)
2705                 return -ENODEV;
2706
2707         while ((cmd = next_cmd(&buf))) {
2708                 if (strlencmp(cmd, "enable") == 0) {
2709                         bluetooth_set_radiosw(1);
2710                 } else if (strlencmp(cmd, "disable") == 0) {
2711                         bluetooth_set_radiosw(0);
2712                 } else
2713                         return -EINVAL;
2714         }
2715
2716         return 0;
2717 }
2718
2719 static struct ibm_struct bluetooth_driver_data = {
2720         .name = "bluetooth",
2721         .read = bluetooth_read,
2722         .write = bluetooth_write,
2723         .exit = bluetooth_exit,
2724 };
2725
2726 /*************************************************************************
2727  * Wan subdriver
2728  */
2729
2730 enum {
2731         /* ACPI GWAN/SWAN bits */
2732         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2733         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2734         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2735 };
2736
2737 static int wan_get_radiosw(void);
2738 static int wan_set_radiosw(int radio_on);
2739
2740 /* sysfs wan enable ---------------------------------------------------- */
2741 static ssize_t wan_enable_show(struct device *dev,
2742                            struct device_attribute *attr,
2743                            char *buf)
2744 {
2745         int status;
2746
2747         status = wan_get_radiosw();
2748         if (status < 0)
2749                 return status;
2750
2751         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2752 }
2753
2754 static ssize_t wan_enable_store(struct device *dev,
2755                             struct device_attribute *attr,
2756                             const char *buf, size_t count)
2757 {
2758         unsigned long t;
2759         int res;
2760
2761         if (parse_strtoul(buf, 1, &t))
2762                 return -EINVAL;
2763
2764         res = wan_set_radiosw(t);
2765
2766         return (res) ? res : count;
2767 }
2768
2769 static struct device_attribute dev_attr_wan_enable =
2770         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2771                 wan_enable_show, wan_enable_store);
2772
2773 /* --------------------------------------------------------------------- */
2774
2775 static struct attribute *wan_attributes[] = {
2776         &dev_attr_wan_enable.attr,
2777         NULL
2778 };
2779
2780 static const struct attribute_group wan_attr_group = {
2781         .attrs = wan_attributes,
2782 };
2783
2784 static int __init wan_init(struct ibm_init_struct *iibm)
2785 {
2786         int res;
2787         int status = 0;
2788
2789         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2790
2791         TPACPI_ACPIHANDLE_INIT(hkey);
2792
2793         tp_features.wan = hkey_handle &&
2794             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2795
2796         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2797                 str_supported(tp_features.wan),
2798                 status);
2799
2800         if (tp_features.wan) {
2801                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2802                         /* no wan hardware present in system */
2803                         tp_features.wan = 0;
2804                         dbg_printk(TPACPI_DBG_INIT,
2805                                    "wan hardware not installed\n");
2806                 } else {
2807                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2808                                         &wan_attr_group);
2809                         if (res)
2810                                 return res;
2811                 }
2812         }
2813
2814         return (tp_features.wan)? 0 : 1;
2815 }
2816
2817 static void wan_exit(void)
2818 {
2819         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2820                 &wan_attr_group);
2821 }
2822
2823 static int wan_get_radiosw(void)
2824 {
2825         int status;
2826
2827         if (!tp_features.wan)
2828                 return -ENODEV;
2829
2830         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2831                 return -EIO;
2832
2833         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2834 }
2835
2836 static int wan_set_radiosw(int radio_on)
2837 {
2838         int status;
2839
2840         if (!tp_features.wan)
2841                 return -ENODEV;
2842
2843         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2844                 return -EIO;
2845         if (radio_on)
2846                 status |= TP_ACPI_WANCARD_RADIOSSW;
2847         else
2848                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2849         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2850                 return -EIO;
2851
2852         return 0;
2853 }
2854
2855 /* procfs -------------------------------------------------------------- */
2856 static int wan_read(char *p)
2857 {
2858         int len = 0;
2859         int status = wan_get_radiosw();
2860
2861         if (!tp_features.wan)
2862                 len += sprintf(p + len, "status:\t\tnot supported\n");
2863         else {
2864                 len += sprintf(p + len, "status:\t\t%s\n",
2865                                 (status)? "enabled" : "disabled");
2866                 len += sprintf(p + len, "commands:\tenable, disable\n");
2867         }
2868
2869         return len;
2870 }
2871
2872 static int wan_write(char *buf)
2873 {
2874         char *cmd;
2875
2876         if (!tp_features.wan)
2877                 return -ENODEV;
2878
2879         while ((cmd = next_cmd(&buf))) {
2880                 if (strlencmp(cmd, "enable") == 0) {
2881                         wan_set_radiosw(1);
2882                 } else if (strlencmp(cmd, "disable") == 0) {
2883                         wan_set_radiosw(0);
2884                 } else
2885                         return -EINVAL;
2886         }
2887
2888         return 0;
2889 }
2890
2891 static struct ibm_struct wan_driver_data = {
2892         .name = "wan",
2893         .read = wan_read,
2894         .write = wan_write,
2895         .exit = wan_exit,
2896         .flags.experimental = 1,
2897 };
2898
2899 /*************************************************************************
2900  * Video subdriver
2901  */
2902
2903 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2904
2905 enum video_access_mode {
2906         TPACPI_VIDEO_NONE = 0,
2907         TPACPI_VIDEO_570,       /* 570 */
2908         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2909         TPACPI_VIDEO_NEW,       /* all others */
2910 };
2911
2912 enum {  /* video status flags, based on VIDEO_570 */
2913         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2914         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2915         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2916 };
2917
2918 enum {  /* TPACPI_VIDEO_570 constants */
2919         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2920         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2921                                                  * video_status_flags */
2922         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2923         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2924 };
2925
2926 static enum video_access_mode video_supported;
2927 static int video_orig_autosw;
2928
2929 static int video_autosw_get(void);
2930 static int video_autosw_set(int enable);
2931
2932 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2933
2934 static int __init video_init(struct ibm_init_struct *iibm)
2935 {
2936         int ivga;
2937
2938         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2939
2940         TPACPI_ACPIHANDLE_INIT(vid);
2941         TPACPI_ACPIHANDLE_INIT(vid2);
2942
2943         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2944                 /* G41, assume IVGA doesn't change */
2945                 vid_handle = vid2_handle;
2946
2947         if (!vid_handle)
2948                 /* video switching not supported on R30, R31 */
2949                 video_supported = TPACPI_VIDEO_NONE;
2950         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2951                 /* 570 */
2952                 video_supported = TPACPI_VIDEO_570;
2953         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2954                 /* 600e/x, 770e, 770x */
2955                 video_supported = TPACPI_VIDEO_770;
2956         else
2957                 /* all others */
2958                 video_supported = TPACPI_VIDEO_NEW;
2959
2960         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2961                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2962                 video_supported);
2963
2964         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2965 }
2966
2967 static void video_exit(void)
2968 {
2969         dbg_printk(TPACPI_DBG_EXIT,
2970                    "restoring original video autoswitch mode\n");
2971         if (video_autosw_set(video_orig_autosw))
2972                 printk(TPACPI_ERR "error while trying to restore original "
2973                         "video autoswitch mode\n");
2974 }
2975
2976 static int video_outputsw_get(void)
2977 {
2978         int status = 0;
2979         int i;
2980
2981         switch (video_supported) {
2982         case TPACPI_VIDEO_570:
2983                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2984                                  TP_ACPI_VIDEO_570_PHSCMD))
2985                         return -EIO;
2986                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2987                 break;
2988         case TPACPI_VIDEO_770:
2989                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2990                         return -EIO;
2991                 if (i)
2992                         status |= TP_ACPI_VIDEO_S_LCD;
2993                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2994                         return -EIO;
2995                 if (i)
2996                         status |= TP_ACPI_VIDEO_S_CRT;
2997                 break;
2998         case TPACPI_VIDEO_NEW:
2999                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3000                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3001                         return -EIO;
3002                 if (i)
3003                         status |= TP_ACPI_VIDEO_S_CRT;
3004
3005                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3006                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3007                         return -EIO;
3008                 if (i)
3009                         status |= TP_ACPI_VIDEO_S_LCD;
3010                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3011                         return -EIO;
3012                 if (i)
3013                         status |= TP_ACPI_VIDEO_S_DVI;
3014                 break;
3015         default:
3016                 return -ENOSYS;
3017         }
3018
3019         return status;
3020 }
3021
3022 static int video_outputsw_set(int status)
3023 {
3024         int autosw;
3025         int res = 0;
3026
3027         switch (video_supported) {
3028         case TPACPI_VIDEO_570:
3029                 res = acpi_evalf(NULL, NULL,
3030                                  "\\_SB.PHS2", "vdd",
3031                                  TP_ACPI_VIDEO_570_PHS2CMD,
3032                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3033                 break;
3034         case TPACPI_VIDEO_770:
3035                 autosw = video_autosw_get();
3036                 if (autosw < 0)
3037                         return autosw;
3038
3039                 res = video_autosw_set(1);
3040                 if (res)
3041                         return res;
3042                 res = acpi_evalf(vid_handle, NULL,
3043                                  "ASWT", "vdd", status * 0x100, 0);
3044                 if (!autosw && video_autosw_set(autosw)) {
3045                         printk(TPACPI_ERR
3046                                "video auto-switch left enabled due to error\n");
3047                         return -EIO;
3048                 }
3049                 break;
3050         case TPACPI_VIDEO_NEW:
3051                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3052                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3053                 break;
3054         default:
3055                 return -ENOSYS;
3056         }
3057
3058         return (res)? 0 : -EIO;
3059 }
3060
3061 static int video_autosw_get(void)
3062 {
3063         int autosw = 0;
3064
3065         switch (video_supported) {
3066         case TPACPI_VIDEO_570:
3067                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3068                         return -EIO;
3069                 break;
3070         case TPACPI_VIDEO_770:
3071         case TPACPI_VIDEO_NEW:
3072                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3073                         return -EIO;
3074                 break;
3075         default:
3076                 return -ENOSYS;
3077         }
3078
3079         return autosw & 1;
3080 }
3081
3082 static int video_autosw_set(int enable)
3083 {
3084         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3085                 return -EIO;
3086         return 0;
3087 }
3088
3089 static int video_outputsw_cycle(void)
3090 {
3091         int autosw = video_autosw_get();
3092         int res;
3093
3094         if (autosw < 0)
3095                 return autosw;
3096
3097         switch (video_supported) {
3098         case TPACPI_VIDEO_570:
3099                 res = video_autosw_set(1);
3100                 if (res)
3101                         return res;
3102                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3103                 break;
3104         case TPACPI_VIDEO_770:
3105         case TPACPI_VIDEO_NEW:
3106                 res = video_autosw_set(1);
3107                 if (res)
3108                         return res;
3109                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3110                 break;
3111         default:
3112                 return -ENOSYS;
3113         }
3114         if (!autosw && video_autosw_set(autosw)) {
3115                 printk(TPACPI_ERR
3116                        "video auto-switch left enabled due to error\n");
3117                 return -EIO;
3118         }
3119
3120         return (res)? 0 : -EIO;
3121 }
3122
3123 static int video_expand_toggle(void)
3124 {
3125         switch (video_supported) {
3126         case TPACPI_VIDEO_570:
3127                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3128                         0 : -EIO;
3129         case TPACPI_VIDEO_770:
3130                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3131                         0 : -EIO;
3132         case TPACPI_VIDEO_NEW:
3133                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3134                         0 : -EIO;
3135         default:
3136                 return -ENOSYS;
3137         }
3138         /* not reached */
3139 }
3140
3141 static int video_read(char *p)
3142 {
3143         int status, autosw;
3144         int len = 0;
3145
3146         if (video_supported == TPACPI_VIDEO_NONE) {
3147                 len += sprintf(p + len, "status:\t\tnot supported\n");
3148                 return len;
3149         }
3150
3151         status = video_outputsw_get();
3152         if (status < 0)
3153                 return status;
3154
3155         autosw = video_autosw_get();
3156         if (autosw < 0)
3157                 return autosw;
3158
3159         len += sprintf(p + len, "status:\t\tsupported\n");
3160         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3161         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3162         if (video_supported == TPACPI_VIDEO_NEW)
3163                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3164         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3165         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3166         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3167         if (video_supported == TPACPI_VIDEO_NEW)
3168                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3169         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3170         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3171
3172         return len;
3173 }
3174
3175 static int video_write(char *buf)
3176 {
3177         char *cmd;
3178         int enable, disable, status;
3179         int res;
3180
3181         if (video_supported == TPACPI_VIDEO_NONE)
3182                 return -ENODEV;
3183
3184         enable = 0;
3185         disable = 0;
3186
3187         while ((cmd = next_cmd(&buf))) {
3188                 if (strlencmp(cmd, "lcd_enable") == 0) {
3189                         enable |= TP_ACPI_VIDEO_S_LCD;
3190                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3191                         disable |= TP_ACPI_VIDEO_S_LCD;
3192                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3193                         enable |= TP_ACPI_VIDEO_S_CRT;
3194                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3195                         disable |= TP_ACPI_VIDEO_S_CRT;
3196                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3197                            strlencmp(cmd, "dvi_enable") == 0) {
3198                         enable |= TP_ACPI_VIDEO_S_DVI;
3199                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3200                            strlencmp(cmd, "dvi_disable") == 0) {
3201                         disable |= TP_ACPI_VIDEO_S_DVI;
3202                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3203                         res = video_autosw_set(1);
3204                         if (res)
3205                                 return res;
3206                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3207                         res = video_autosw_set(0);
3208                         if (res)
3209                                 return res;
3210                 } else if (strlencmp(cmd, "video_switch") == 0) {
3211                         res = video_outputsw_cycle();
3212                         if (res)
3213                                 return res;
3214                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3215                         res = video_expand_toggle();
3216                         if (res)
3217                                 return res;
3218                 } else
3219                         return -EINVAL;
3220         }
3221
3222         if (enable || disable) {
3223                 status = video_outputsw_get();
3224                 if (status < 0)
3225                         return status;
3226                 res = video_outputsw_set((status & ~disable) | enable);
3227                 if (res)
3228                         return res;
3229         }
3230
3231         return 0;
3232 }
3233
3234 static struct ibm_struct video_driver_data = {
3235         .name = "video",
3236         .read = video_read,
3237         .write = video_write,
3238         .exit = video_exit,
3239 };
3240
3241 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3242
3243 /*************************************************************************
3244  * Light (thinklight) subdriver
3245  */
3246
3247 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3248 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3249
3250 static int light_get_status(void)
3251 {
3252         int status = 0;
3253
3254         if (tp_features.light_status) {
3255                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3256                         return -EIO;
3257                 return (!!status);
3258         }
3259
3260         return -ENXIO;
3261 }
3262
3263 static int light_set_status(int status)
3264 {
3265         int rc;
3266
3267         if (tp_features.light) {
3268                 if (cmos_handle) {
3269                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3270                                         (status)?
3271                                                 TP_CMOS_THINKLIGHT_ON :
3272                                                 TP_CMOS_THINKLIGHT_OFF);
3273                 } else {
3274                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3275                                         (status)? 1 : 0);
3276                 }
3277                 return (rc)? 0 : -EIO;
3278         }
3279
3280         return -ENXIO;
3281 }
3282
3283 static int __init light_init(struct ibm_init_struct *iibm)
3284 {
3285         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3286
3287         TPACPI_ACPIHANDLE_INIT(ledb);
3288         TPACPI_ACPIHANDLE_INIT(lght);
3289         TPACPI_ACPIHANDLE_INIT(cmos);
3290
3291         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3292         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3293
3294         if (tp_features.light)
3295                 /* light status not supported on
3296                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3297                 tp_features.light_status =
3298                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3299
3300         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3301                 str_supported(tp_features.light));
3302
3303         return (tp_features.light)? 0 : 1;
3304 }
3305
3306 static int light_read(char *p)
3307 {
3308         int len = 0;
3309         int status;
3310
3311         if (!tp_features.light) {
3312                 len += sprintf(p + len, "status:\t\tnot supported\n");
3313         } else if (!tp_features.light_status) {
3314                 len += sprintf(p + len, "status:\t\tunknown\n");
3315                 len += sprintf(p + len, "commands:\ton, off\n");
3316         } else {
3317                 status = light_get_status();
3318                 if (status < 0)
3319                         return status;
3320                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3321                 len += sprintf(p + len, "commands:\ton, off\n");
3322         }
3323
3324         return len;
3325 }
3326
3327 static int light_write(char *buf)
3328 {
3329         char *cmd;
3330         int newstatus = 0;
3331
3332         if (!tp_features.light)
3333                 return -ENODEV;
3334
3335         while ((cmd = next_cmd(&buf))) {
3336                 if (strlencmp(cmd, "on") == 0) {
3337                         newstatus = 1;
3338                 } else if (strlencmp(cmd, "off") == 0) {
3339                         newstatus = 0;
3340                 } else
3341                         return -EINVAL;
3342         }
3343
3344         return light_set_status(newstatus);
3345 }
3346
3347 static struct ibm_struct light_driver_data = {
3348         .name = "light",
3349         .read = light_read,
3350         .write = light_write,
3351 };
3352
3353 /*************************************************************************
3354  * Dock subdriver
3355  */
3356
3357 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3358
3359 static void dock_notify(struct ibm_struct *ibm, u32 event);
3360 static int dock_read(char *p);
3361 static int dock_write(char *buf);
3362
3363 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3364            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3365            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3366            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3367     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3368
3369 /* don't list other alternatives as we install a notify handler on the 570 */
3370 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3371
3372 static const struct acpi_device_id ibm_pci_device_ids[] = {
3373         {PCI_ROOT_HID_STRING, 0},
3374         {"", 0},
3375 };
3376
3377 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3378         {
3379          .notify = dock_notify,
3380          .handle = &dock_handle,
3381          .type = ACPI_SYSTEM_NOTIFY,
3382         },
3383         {
3384         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3385          * We just use it to get notifications of dock hotplug
3386          * in very old thinkpads */
3387          .hid = ibm_pci_device_ids,
3388          .notify = dock_notify,
3389          .handle = &pci_handle,
3390          .type = ACPI_SYSTEM_NOTIFY,
3391         },
3392 };
3393
3394 static struct ibm_struct dock_driver_data[2] = {
3395         {
3396          .name = "dock",
3397          .read = dock_read,
3398          .write = dock_write,
3399          .acpi = &ibm_dock_acpidriver[0],
3400         },
3401         {
3402          .name = "dock",
3403          .acpi = &ibm_dock_acpidriver[1],
3404         },
3405 };
3406
3407 #define dock_docked() (_sta(dock_handle) & 1)
3408
3409 static int __init dock_init(struct ibm_init_struct *iibm)
3410 {
3411         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3412
3413         TPACPI_ACPIHANDLE_INIT(dock);
3414
3415         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3416                 str_supported(dock_handle != NULL));
3417
3418         return (dock_handle)? 0 : 1;
3419 }
3420
3421 static int __init dock_init2(struct ibm_init_struct *iibm)
3422 {
3423         int dock2_needed;
3424
3425         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3426
3427         if (dock_driver_data[0].flags.acpi_driver_registered &&
3428             dock_driver_data[0].flags.acpi_notify_installed) {
3429                 TPACPI_ACPIHANDLE_INIT(pci);
3430                 dock2_needed = (pci_handle != NULL);
3431                 vdbg_printk(TPACPI_DBG_INIT,
3432                             "dock PCI handler for the TP 570 is %s\n",
3433                             str_supported(dock2_needed));
3434         } else {
3435                 vdbg_printk(TPACPI_DBG_INIT,
3436                 "dock subdriver part 2 not required\n");
3437                 dock2_needed = 0;
3438         }
3439
3440         return (dock2_needed)? 0 : 1;
3441 }
3442
3443 static void dock_notify(struct ibm_struct *ibm, u32 event)
3444 {
3445         int docked = dock_docked();
3446         int pci = ibm->acpi->hid && ibm->acpi->device &&
3447                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3448         int data;
3449
3450         if (event == 1 && !pci) /* 570 */
3451                 data = 1;       /* button */
3452         else if (event == 1 && pci)     /* 570 */
3453                 data = 3;       /* dock */
3454         else if (event == 3 && docked)
3455                 data = 1;       /* button */
3456         else if (event == 3 && !docked)
3457                 data = 2;       /* undock */
3458         else if (event == 0 && docked)
3459                 data = 3;       /* dock */
3460         else {
3461                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3462                        event, _sta(dock_handle));
3463                 data = 0;       /* unknown */
3464         }
3465         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3466         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3467                                           ibm->acpi->device->dev.bus_id,
3468                                           event, data);
3469 }
3470
3471 static int dock_read(char *p)
3472 {
3473         int len = 0;
3474         int docked = dock_docked();
3475
3476         if (!dock_handle)
3477                 len += sprintf(p + len, "status:\t\tnot supported\n");
3478         else if (!docked)
3479                 len += sprintf(p + len, "status:\t\tundocked\n");
3480         else {
3481                 len += sprintf(p + len, "status:\t\tdocked\n");
3482                 len += sprintf(p + len, "commands:\tdock, undock\n");
3483         }
3484
3485         return len;
3486 }
3487
3488 static int dock_write(char *buf)
3489 {
3490         char *cmd;
3491
3492         if (!dock_docked())
3493                 return -ENODEV;
3494
3495         while ((cmd = next_cmd(&buf))) {
3496                 if (strlencmp(cmd, "undock") == 0) {
3497                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3498                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3499                                 return -EIO;
3500                 } else if (strlencmp(cmd, "dock") == 0) {
3501                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3502                                 return -EIO;
3503                 } else
3504                         return -EINVAL;
3505         }
3506
3507         return 0;
3508 }
3509
3510 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3511
3512 /*************************************************************************
3513  * Bay subdriver
3514  */
3515
3516 #ifdef CONFIG_THINKPAD_ACPI_BAY
3517
3518 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3519            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3520            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3521            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3522            );                           /* A21e, R30, R31 */
3523 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3524            "_EJ0",              /* all others */
3525            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3526 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3527            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3528            );                           /* all others */
3529 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3530            "_EJ0",                      /* 770x */
3531            );                           /* all others */
3532
3533 static int __init bay_init(struct ibm_init_struct *iibm)
3534 {
3535         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3536
3537         TPACPI_ACPIHANDLE_INIT(bay);
3538         if (bay_handle)
3539                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3540         TPACPI_ACPIHANDLE_INIT(bay2);
3541         if (bay2_handle)
3542                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3543
3544         tp_features.bay_status = bay_handle &&
3545                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3546         tp_features.bay_status2 = bay2_handle &&
3547                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3548
3549         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3550                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3551         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3552                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3553
3554         vdbg_printk(TPACPI_DBG_INIT,
3555                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3556                 str_supported(tp_features.bay_status),
3557                 str_supported(tp_features.bay_eject),
3558                 str_supported(tp_features.bay_status2),
3559                 str_supported(tp_features.bay_eject2));
3560
3561         return (tp_features.bay_status || tp_features.bay_eject ||
3562                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3563 }
3564
3565 static void bay_notify(struct ibm_struct *ibm, u32 event)
3566 {
3567         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3568         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3569                                           ibm->acpi->device->dev.bus_id,
3570                                           event, 0);
3571 }
3572
3573 #define bay_occupied(b) (_sta(b##_handle) & 1)
3574
3575 static int bay_read(char *p)
3576 {
3577         int len = 0;
3578         int occupied = bay_occupied(bay);
3579         int occupied2 = bay_occupied(bay2);
3580         int eject, eject2;
3581
3582         len += sprintf(p + len, "status:\t\t%s\n",
3583                 tp_features.bay_status ?
3584                         (occupied ? "occupied" : "unoccupied") :
3585                                 "not supported");
3586         if (tp_features.bay_status2)
3587                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3588                                "occupied" : "unoccupied");
3589
3590         eject = tp_features.bay_eject && occupied;
3591         eject2 = tp_features.bay_eject2 && occupied2;
3592
3593         if (eject && eject2)
3594                 len += sprintf(p + len, "commands:\teject, eject2\n");
3595         else if (eject)
3596                 len += sprintf(p + len, "commands:\teject\n");
3597         else if (eject2)
3598                 len += sprintf(p + len, "commands:\teject2\n");
3599
3600         return len;
3601 }
3602
3603 static int bay_write(char *buf)
3604 {
3605         char *cmd;
3606
3607         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3608                 return -ENODEV;
3609
3610         while ((cmd = next_cmd(&buf))) {
3611                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3612                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3613                                 return -EIO;
3614                 } else if (tp_features.bay_eject2 &&
3615                            strlencmp(cmd, "eject2") == 0) {
3616                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3617                                 return -EIO;
3618                 } else
3619                         return -EINVAL;
3620         }
3621
3622         return 0;
3623 }
3624
3625 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3626         .notify = bay_notify,
3627         .handle = &bay_handle,
3628         .type = ACPI_SYSTEM_NOTIFY,
3629 };
3630
3631 static struct ibm_struct bay_driver_data = {
3632         .name = "bay",
3633         .read = bay_read,
3634         .write = bay_write,
3635         .acpi = &ibm_bay_acpidriver,
3636 };
3637
3638 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3639
3640 /*************************************************************************
3641  * CMOS subdriver
3642  */
3643
3644 /* sysfs cmos_command -------------------------------------------------- */
3645 static ssize_t cmos_command_store(struct device *dev,
3646                             struct device_attribute *attr,
3647                             const char *buf, size_t count)
3648 {
3649         unsigned long cmos_cmd;
3650         int res;
3651
3652         if (parse_strtoul(buf, 21, &cmos_cmd))
3653                 return -EINVAL;
3654
3655         res = issue_thinkpad_cmos_command(cmos_cmd);
3656         return (res)? res : count;
3657 }
3658
3659 static struct device_attribute dev_attr_cmos_command =
3660         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3661
3662 /* --------------------------------------------------------------------- */
3663
3664 static int __init cmos_init(struct ibm_init_struct *iibm)
3665 {
3666         int res;
3667
3668         vdbg_printk(TPACPI_DBG_INIT,
3669                 "initializing cmos commands subdriver\n");
3670
3671         TPACPI_ACPIHANDLE_INIT(cmos);
3672
3673         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3674                 str_supported(cmos_handle != NULL));
3675
3676         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3677         if (res)
3678                 return res;
3679
3680         return (cmos_handle)? 0 : 1;
3681 }
3682
3683 static void cmos_exit(void)
3684 {
3685         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3686 }
3687
3688 static int cmos_read(char *p)
3689 {
3690         int len = 0;
3691
3692         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3693            R30, R31, T20-22, X20-21 */
3694         if (!cmos_handle)
3695                 len += sprintf(p + len, "status:\t\tnot supported\n");
3696         else {
3697                 len += sprintf(p + len, "status:\t\tsupported\n");
3698                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3699         }
3700
3701         return len;
3702 }
3703
3704 static int cmos_write(char *buf)
3705 {
3706         char *cmd;
3707         int cmos_cmd, res;
3708
3709         while ((cmd = next_cmd(&buf))) {
3710                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3711                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3712                         /* cmos_cmd set */
3713                 } else
3714                         return -EINVAL;
3715
3716                 res = issue_thinkpad_cmos_command(cmos_cmd);
3717                 if (res)
3718                         return res;
3719         }
3720
3721         return 0;
3722 }
3723
3724 static struct ibm_struct cmos_driver_data = {
3725         .name = "cmos",
3726         .read = cmos_read,
3727         .write = cmos_write,
3728         .exit = cmos_exit,
3729 };
3730
3731 /*************************************************************************
3732  * LED subdriver
3733  */
3734
3735 enum led_access_mode {
3736         TPACPI_LED_NONE = 0,
3737         TPACPI_LED_570, /* 570 */
3738         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3739         TPACPI_LED_NEW, /* all others */
3740 };
3741
3742 enum {  /* For TPACPI_LED_OLD */
3743         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3744         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3745         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3746 };
3747
3748 enum led_status_t {
3749         TPACPI_LED_OFF = 0,
3750         TPACPI_LED_ON,
3751         TPACPI_LED_BLINK,
3752 };
3753
3754 static enum led_access_mode led_supported;
3755
3756 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3757            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3758                                 /* T20-22, X20-21 */
3759            "LED",               /* all others */
3760            );                   /* R30, R31 */
3761
3762 static int led_get_status(unsigned int led)
3763 {
3764         int status;
3765
3766         switch (led_supported) {
3767         case TPACPI_LED_570:
3768                 if (!acpi_evalf(ec_handle,
3769                                 &status, "GLED", "dd", 1 << led))
3770                         return -EIO;
3771                 return (status == 0)?
3772                                 TPACPI_LED_OFF :
3773                                 ((status == 1)?
3774                                         TPACPI_LED_ON :
3775                                         TPACPI_LED_BLINK);
3776         default:
3777                 return -ENXIO;
3778         }
3779
3780         /* not reached */
3781 }
3782
3783 static int led_set_status(unsigned int led, enum led_status_t ledstatus)
3784 {
3785         /* off, on, blink. Index is led_status_t */
3786         static const int const led_sled_arg1[] = { 0, 1, 3 };
3787         static const int const led_exp_hlbl[] = { 0, 0, 1 };    /* led# * */
3788         static const int const led_exp_hlcl[] = { 0, 1, 1 };    /* led# * */
3789         static const int const led_led_arg1[] = { 0, 0x80, 0xc0 };
3790
3791         int rc = 0;
3792
3793         switch (led_supported) {
3794         case TPACPI_LED_570:
3795                         /* 570 */
3796                         led = 1 << led;
3797                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3798                                         led, led_sled_arg1[ledstatus]))
3799                                 rc = -EIO;
3800                         break;
3801         case TPACPI_LED_OLD:
3802                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3803                         led = 1 << led;
3804                         rc = ec_write(TPACPI_LED_EC_HLMS, led);
3805                         if (rc >= 0)
3806                                 rc = ec_write(TPACPI_LED_EC_HLBL,
3807                                               led * led_exp_hlbl[ledstatus]);
3808                         if (rc >= 0)
3809                                 rc = ec_write(TPACPI_LED_EC_HLCL,
3810                                                led * led_exp_hlcl[ledstatus]);
3811                         break;
3812         case TPACPI_LED_NEW:
3813                         /* all others */
3814                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3815                                         led, led_led_arg1[ledstatus]))
3816                                 rc = -EIO;
3817                         break;
3818         default:
3819                 rc = -ENXIO;
3820         }
3821
3822         return rc;
3823 }
3824
3825 static int __init led_init(struct ibm_init_struct *iibm)
3826 {
3827         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3828
3829         TPACPI_ACPIHANDLE_INIT(led);
3830
3831         if (!led_handle)
3832                 /* led not supported on R30, R31 */
3833                 led_supported = TPACPI_LED_NONE;
3834         else if (strlencmp(led_path, "SLED") == 0)
3835                 /* 570 */
3836                 led_supported = TPACPI_LED_570;
3837         else if (strlencmp(led_path, "SYSL") == 0)
3838                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3839                 led_supported = TPACPI_LED_OLD;
3840         else
3841                 /* all others */
3842                 led_supported = TPACPI_LED_NEW;
3843
3844         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3845                 str_supported(led_supported), led_supported);
3846
3847         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3848 }
3849
3850 #define str_led_status(s) \
3851         ((s) == TPACPI_LED_OFF ? "off" : \
3852                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
3853
3854 static int led_read(char *p)
3855 {
3856         int len = 0;
3857
3858         if (!led_supported) {
3859                 len += sprintf(p + len, "status:\t\tnot supported\n");
3860                 return len;
3861         }
3862         len += sprintf(p + len, "status:\t\tsupported\n");
3863
3864         if (led_supported == TPACPI_LED_570) {
3865                 /* 570 */
3866                 int i, status;
3867                 for (i = 0; i < 8; i++) {
3868                         status = led_get_status(i);
3869                         if (status < 0)
3870                                 return -EIO;
3871                         len += sprintf(p + len, "%d:\t\t%s\n",
3872                                        i, str_led_status(status));
3873                 }
3874         }
3875
3876         len += sprintf(p + len, "commands:\t"
3877                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3878
3879         return len;
3880 }
3881
3882 static int led_write(char *buf)
3883 {
3884         char *cmd;
3885         int led, rc;
3886         enum led_status_t s;
3887
3888         if (!led_supported)
3889                 return -ENODEV;
3890
3891         while ((cmd = next_cmd(&buf))) {
3892                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3893                         return -EINVAL;
3894
3895                 if (strstr(cmd, "off")) {
3896                         s = TPACPI_LED_OFF;
3897                 } else if (strstr(cmd, "on")) {
3898                         s = TPACPI_LED_ON;
3899                 } else if (strstr(cmd, "blink")) {
3900                         s = TPACPI_LED_BLINK;
3901                 } else {
3902                         return -EINVAL;
3903                 }
3904
3905                 rc = led_set_status(led, s);
3906                 if (rc < 0)
3907                         return rc;
3908         }
3909
3910         return 0;
3911 }
3912
3913 static struct ibm_struct led_driver_data = {
3914         .name = "led",
3915         .read = led_read,
3916         .write = led_write,
3917 };
3918
3919 /*************************************************************************
3920  * Beep subdriver
3921  */
3922
3923 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
3924
3925 static int __init beep_init(struct ibm_init_struct *iibm)
3926 {
3927         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3928
3929         TPACPI_ACPIHANDLE_INIT(beep);
3930
3931         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3932                 str_supported(beep_handle != NULL));
3933
3934         return (beep_handle)? 0 : 1;
3935 }
3936
3937 static int beep_read(char *p)
3938 {
3939         int len = 0;
3940
3941         if (!beep_handle)
3942                 len += sprintf(p + len, "status:\t\tnot supported\n");
3943         else {
3944                 len += sprintf(p + len, "status:\t\tsupported\n");
3945                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3946         }
3947
3948         return len;
3949 }
3950
3951 static int beep_write(char *buf)
3952 {
3953         char *cmd;
3954         int beep_cmd;
3955
3956         if (!beep_handle)
3957                 return -ENODEV;
3958
3959         while ((cmd = next_cmd(&buf))) {
3960                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3961                     beep_cmd >= 0 && beep_cmd <= 17) {
3962                         /* beep_cmd set */
3963                 } else
3964                         return -EINVAL;
3965                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3966                         return -EIO;
3967         }
3968
3969         return 0;
3970 }
3971
3972 static struct ibm_struct beep_driver_data = {
3973         .name = "beep",
3974         .read = beep_read,
3975         .write = beep_write,
3976 };
3977
3978 /*************************************************************************
3979  * Thermal subdriver
3980  */
3981
3982 enum thermal_access_mode {
3983         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
3984         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
3985         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
3986         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
3987         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
3988 };
3989
3990 enum { /* TPACPI_THERMAL_TPEC_* */
3991         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
3992         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
3993         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
3994 };
3995
3996 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
3997 struct ibm_thermal_sensors_struct {
3998         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3999 };
4000
4001 static enum thermal_access_mode thermal_read_mode;
4002
4003 /* idx is zero-based */
4004 static int thermal_get_sensor(int idx, s32 *value)
4005 {
4006         int t;
4007         s8 tmp;
4008         char tmpi[5];
4009
4010         t = TP_EC_THERMAL_TMP0;
4011
4012         switch (thermal_read_mode) {
4013 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4014         case TPACPI_THERMAL_TPEC_16:
4015                 if (idx >= 8 && idx <= 15) {
4016                         t = TP_EC_THERMAL_TMP8;
4017                         idx -= 8;
4018                 }
4019                 /* fallthrough */
4020 #endif
4021         case TPACPI_THERMAL_TPEC_8:
4022                 if (idx <= 7) {
4023                         if (!acpi_ec_read(t + idx, &tmp))
4024                                 return -EIO;
4025                         *value = tmp * 1000;
4026                         return 0;
4027                 }
4028                 break;
4029
4030         case TPACPI_THERMAL_ACPI_UPDT:
4031                 if (idx <= 7) {
4032                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4033                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4034                                 return -EIO;
4035                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4036                                 return -EIO;
4037                         *value = (t - 2732) * 100;
4038                         return 0;
4039                 }
4040                 break;
4041
4042         case TPACPI_THERMAL_ACPI_TMP07:
4043                 if (idx <= 7) {
4044                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4045                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4046                                 return -EIO;
4047                         if (t > 127 || t < -127)
4048                                 t = TP_EC_THERMAL_TMP_NA;
4049                         *value = t * 1000;
4050                         return 0;
4051                 }
4052                 break;
4053
4054         case TPACPI_THERMAL_NONE:
4055         default:
4056                 return -ENOSYS;
4057         }
4058
4059         return -EINVAL;
4060 }
4061
4062 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4063 {
4064         int res, i;
4065         int n;
4066
4067         n = 8;
4068         i = 0;
4069
4070         if (!s)
4071                 return -EINVAL;
4072
4073         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4074                 n = 16;
4075
4076         for (i = 0 ; i < n; i++) {
4077                 res = thermal_get_sensor(i, &s->temp[i]);
4078                 if (res)
4079                         return res;
4080         }
4081
4082         return n;
4083 }
4084
4085 /* sysfs temp##_input -------------------------------------------------- */
4086
4087 static ssize_t thermal_temp_input_show(struct device *dev,
4088                            struct device_attribute *attr,
4089                            char *buf)
4090 {
4091         struct sensor_device_attribute *sensor_attr =
4092                                         to_sensor_dev_attr(attr);
4093         int idx = sensor_attr->index;
4094         s32 value;
4095         int res;
4096
4097         res = thermal_get_sensor(idx, &value);
4098         if (res)
4099                 return res;
4100         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4101                 return -ENXIO;
4102
4103         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4104 }
4105
4106 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4107          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4108                      thermal_temp_input_show, NULL, _idxB)
4109
4110 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4111         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4112         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4113         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4114         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4115         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4116         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4117         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4118         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4119         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4120         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4121         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4122         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4123         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4124         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4125         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4126         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4127 };
4128
4129 #define THERMAL_ATTRS(X) \
4130         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4131
4132 static struct attribute *thermal_temp_input_attr[] = {
4133         THERMAL_ATTRS(8),
4134         THERMAL_ATTRS(9),
4135         THERMAL_ATTRS(10),
4136         THERMAL_ATTRS(11),
4137         THERMAL_ATTRS(12),
4138         THERMAL_ATTRS(13),
4139         THERMAL_ATTRS(14),
4140         THERMAL_ATTRS(15),
4141         THERMAL_ATTRS(0),
4142         THERMAL_ATTRS(1),
4143         THERMAL_ATTRS(2),
4144         THERMAL_ATTRS(3),
4145         THERMAL_ATTRS(4),
4146         THERMAL_ATTRS(5),
4147         THERMAL_ATTRS(6),
4148         THERMAL_ATTRS(7),
4149         NULL
4150 };
4151
4152 static const struct attribute_group thermal_temp_input16_group = {
4153         .attrs = thermal_temp_input_attr
4154 };
4155
4156 static const struct attribute_group thermal_temp_input8_group = {
4157         .attrs = &thermal_temp_input_attr[8]
4158 };
4159
4160 #undef THERMAL_SENSOR_ATTR_TEMP
4161 #undef THERMAL_ATTRS
4162
4163 /* --------------------------------------------------------------------- */
4164
4165 static int __init thermal_init(struct ibm_init_struct *iibm)
4166 {
4167         u8 t, ta1, ta2;
4168         int i;
4169         int acpi_tmp7;
4170         int res;
4171
4172         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4173
4174         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4175
4176         if (thinkpad_id.ec_model) {
4177                 /*
4178                  * Direct EC access mode: sensors at registers
4179                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4180                  * non-implemented, thermal sensors return 0x80 when
4181                  * not available
4182                  */
4183
4184                 ta1 = ta2 = 0;
4185                 for (i = 0; i < 8; i++) {
4186                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4187                                 ta1 |= t;
4188                         } else {
4189                                 ta1 = 0;
4190                                 break;
4191                         }
4192                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4193                                 ta2 |= t;
4194                         } else {
4195                                 ta1 = 0;
4196                                 break;
4197                         }
4198                 }
4199                 if (ta1 == 0) {
4200                         /* This is sheer paranoia, but we handle it anyway */
4201                         if (acpi_tmp7) {
4202                                 printk(TPACPI_ERR
4203                                        "ThinkPad ACPI EC access misbehaving, "
4204                                        "falling back to ACPI TMPx access "
4205                                        "mode\n");
4206                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4207                         } else {
4208                                 printk(TPACPI_ERR
4209                                        "ThinkPad ACPI EC access misbehaving, "
4210                                        "disabling thermal sensors access\n");
4211                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4212                         }
4213                 } else {
4214                         thermal_read_mode =
4215                             (ta2 != 0) ?
4216                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4217                 }
4218         } else if (acpi_tmp7) {
4219                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4220                         /* 600e/x, 770e, 770x */
4221                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4222                 } else {
4223                         /* Standard ACPI TMPx access, max 8 sensors */
4224                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4225                 }
4226         } else {
4227                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4228                 thermal_read_mode = TPACPI_THERMAL_NONE;
4229         }
4230
4231         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4232                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4233                 thermal_read_mode);
4234
4235         switch (thermal_read_mode) {
4236         case TPACPI_THERMAL_TPEC_16:
4237                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4238                                 &thermal_temp_input16_group);
4239                 if (res)
4240                         return res;
4241                 break;
4242         case TPACPI_THERMAL_TPEC_8:
4243         case TPACPI_THERMAL_ACPI_TMP07:
4244         case TPACPI_THERMAL_ACPI_UPDT:
4245                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4246                                 &thermal_temp_input8_group);
4247                 if (res)
4248                         return res;
4249                 break;
4250         case TPACPI_THERMAL_NONE:
4251         default:
4252                 return 1;
4253         }
4254
4255         return 0;
4256 }
4257
4258 static void thermal_exit(void)
4259 {
4260         switch (thermal_read_mode) {
4261         case TPACPI_THERMAL_TPEC_16:
4262                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4263                                    &thermal_temp_input16_group);
4264                 break;
4265         case TPACPI_THERMAL_TPEC_8:
4266         case TPACPI_THERMAL_ACPI_TMP07:
4267         case TPACPI_THERMAL_ACPI_UPDT:
4268                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4269                                    &thermal_temp_input16_group);
4270                 break;
4271         case TPACPI_THERMAL_NONE:
4272         default:
4273                 break;
4274         }
4275 }
4276
4277 static int thermal_read(char *p)
4278 {
4279         int len = 0;
4280         int n, i;
4281         struct ibm_thermal_sensors_struct t;
4282
4283         n = thermal_get_sensors(&t);
4284         if (unlikely(n < 0))
4285                 return n;
4286
4287         len += sprintf(p + len, "temperatures:\t");
4288
4289         if (n > 0) {
4290                 for (i = 0; i < (n - 1); i++)
4291                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4292                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4293         } else
4294                 len += sprintf(p + len, "not supported\n");
4295
4296         return len;
4297 }
4298
4299 static struct ibm_struct thermal_driver_data = {
4300         .name = "thermal",
4301         .read = thermal_read,
4302         .exit = thermal_exit,
4303 };
4304
4305 /*************************************************************************
4306  * EC Dump subdriver
4307  */
4308
4309 static u8 ecdump_regs[256];
4310
4311 static int ecdump_read(char *p)
4312 {
4313         int len = 0;
4314         int i, j;
4315         u8 v;
4316
4317         len += sprintf(p + len, "EC      "
4318                        " +00 +01 +02 +03 +04 +05 +06 +07"
4319                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4320         for (i = 0; i < 256; i += 16) {
4321                 len += sprintf(p + len, "EC 0x%02x:", i);
4322                 for (j = 0; j < 16; j++) {
4323                         if (!acpi_ec_read(i + j, &v))
4324                                 break;
4325                         if (v != ecdump_regs[i + j])
4326                                 len += sprintf(p + len, " *%02x", v);
4327                         else
4328                                 len += sprintf(p + len, "  %02x", v);
4329                         ecdump_regs[i + j] = v;
4330                 }
4331                 len += sprintf(p + len, "\n");
4332                 if (j != 16)
4333                         break;
4334         }
4335
4336         /* These are way too dangerous to advertise openly... */
4337 #if 0
4338         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4339                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4340         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4341                        " (<offset> is 00-ff, <value> is 0-255)\n");
4342 #endif
4343         return len;
4344 }
4345
4346 static int ecdump_write(char *buf)
4347 {
4348         char *cmd;
4349         int i, v;
4350
4351         while ((cmd = next_cmd(&buf))) {
4352                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4353                         /* i and v set */
4354                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4355                         /* i and v set */
4356                 } else
4357                         return -EINVAL;
4358                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4359                         if (!acpi_ec_write(i, v))
4360                                 return -EIO;
4361                 } else
4362                         return -EINVAL;
4363         }
4364
4365         return 0;
4366 }
4367
4368 static struct ibm_struct ecdump_driver_data = {
4369         .name = "ecdump",
4370         .read = ecdump_read,
4371         .write = ecdump_write,
4372         .flags.experimental = 1,
4373 };
4374
4375 /*************************************************************************
4376  * Backlight/brightness subdriver
4377  */
4378
4379 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4380
4381 enum {
4382         TP_EC_BACKLIGHT = 0x31,
4383
4384         /* TP_EC_BACKLIGHT bitmasks */
4385         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4386         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4387         TP_EC_BACKLIGHT_MAPSW = 0x20,
4388 };
4389
4390 static struct backlight_device *ibm_backlight_device;
4391 static int brightness_mode;
4392 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4393
4394 static struct mutex brightness_mutex;
4395
4396 /*
4397  * ThinkPads can read brightness from two places: EC 0x31, or
4398  * CMOS NVRAM byte 0x5E, bits 0-3.
4399  *
4400  * EC 0x31 has the following layout
4401  *   Bit 7: unknown function
4402  *   Bit 6: unknown function
4403  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4404  *   Bit 4: must be set to zero to avoid problems
4405  *   Bit 3-0: backlight brightness level
4406  *
4407  * brightness_get_raw returns status data in the EC 0x31 layout
4408  */
4409 static int brightness_get_raw(int *status)
4410 {
4411         u8 lec = 0, lcmos = 0, level = 0;
4412
4413         if (brightness_mode & 1) {
4414                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4415                         return -EIO;
4416                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4417         };
4418         if (brightness_mode & 2) {
4419                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4420                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4421                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4422                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4423                 level = lcmos;
4424         }
4425
4426         if (brightness_mode == 3) {
4427                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4428                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4429                 if (lec == lcmos)
4430                         tp_warned.bright_cmos_ec_unsync = 0;
4431                 else {
4432                         if (!tp_warned.bright_cmos_ec_unsync) {
4433                                 printk(TPACPI_ERR
4434                                         "CMOS NVRAM (%u) and EC (%u) do not "
4435                                         "agree on display brightness level\n",
4436                                         (unsigned int) lcmos,
4437                                         (unsigned int) lec);
4438                                 tp_warned.bright_cmos_ec_unsync = 1;
4439                         }
4440                         return -EIO;
4441                 }
4442         } else {
4443                 *status = level;
4444         }
4445
4446         return 0;
4447 }
4448
4449 /* May return EINTR which can always be mapped to ERESTARTSYS */
4450 static int brightness_set(int value)
4451 {
4452         int cmos_cmd, inc, i, res;
4453         int current_value;
4454         int command_bits;
4455
4456         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4457             value < 0)
4458                 return -EINVAL;
4459
4460         res = mutex_lock_interruptible(&brightness_mutex);
4461         if (res < 0)
4462                 return res;
4463
4464         res = brightness_get_raw(&current_value);
4465         if (res < 0)
4466                 goto errout;
4467
4468         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4469         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4470
4471         cmos_cmd = value > current_value ?
4472                         TP_CMOS_BRIGHTNESS_UP :
4473                         TP_CMOS_BRIGHTNESS_DOWN;
4474         inc = (value > current_value)? 1 : -1;
4475
4476         res = 0;
4477         for (i = current_value; i != value; i += inc) {
4478                 if ((brightness_mode & 2) &&
4479                     issue_thinkpad_cmos_command(cmos_cmd)) {
4480                         res = -EIO;
4481                         goto errout;
4482                 }
4483                 if ((brightness_mode & 1) &&
4484                     !acpi_ec_write(TP_EC_BACKLIGHT,
4485                                    (i + inc) | command_bits)) {
4486                         res = -EIO;
4487                         goto errout;;
4488                 }
4489         }
4490
4491 errout:
4492         mutex_unlock(&brightness_mutex);
4493         return res;
4494 }
4495
4496 /* sysfs backlight class ----------------------------------------------- */
4497
4498 static int brightness_update_status(struct backlight_device *bd)
4499 {
4500         /* it is the backlight class's job (caller) to handle
4501          * EINTR and other errors properly */
4502         return brightness_set(
4503                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4504                  bd->props.power == FB_BLANK_UNBLANK) ?
4505                                 bd->props.brightness : 0);
4506 }
4507
4508 static int brightness_get(struct backlight_device *bd)
4509 {
4510         int status, res;
4511
4512         res = brightness_get_raw(&status);
4513         if (res < 0)
4514                 return 0; /* FIXME: teach backlight about error handling */
4515
4516         return status & TP_EC_BACKLIGHT_LVLMSK;
4517 }
4518
4519 static struct backlight_ops ibm_backlight_data = {
4520         .get_brightness = brightness_get,
4521         .update_status  = brightness_update_status,
4522 };
4523
4524 /* --------------------------------------------------------------------- */
4525
4526 static int __init brightness_init(struct ibm_init_struct *iibm)
4527 {
4528         int b;
4529
4530         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4531
4532         mutex_init(&brightness_mutex);
4533
4534         /*
4535          * We always attempt to detect acpi support, so as to switch
4536          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4537          * going to publish a backlight interface
4538          */
4539         b = tpacpi_check_std_acpi_brightness_support();
4540         if (b > 0) {
4541                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4542                         printk(TPACPI_NOTICE
4543                                "Lenovo BIOS switched to ACPI backlight "
4544                                "control mode\n");
4545                 }
4546                 if (brightness_enable > 1) {
4547                         printk(TPACPI_NOTICE
4548                                "standard ACPI backlight interface "
4549                                "available, not loading native one...\n");
4550                         return 1;
4551                 }
4552         }
4553
4554         if (!brightness_enable) {
4555                 dbg_printk(TPACPI_DBG_INIT,
4556                            "brightness support disabled by "
4557                            "module parameter\n");
4558                 return 1;
4559         }
4560
4561         if (b > 16) {
4562                 printk(TPACPI_ERR
4563                        "Unsupported brightness interface, "
4564                        "please contact %s\n", TPACPI_MAIL);
4565                 return 1;
4566         }
4567         if (b == 16)
4568                 tp_features.bright_16levels = 1;
4569
4570         if (!brightness_mode) {
4571                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4572                         brightness_mode = 2;
4573                 else
4574                         brightness_mode = 3;
4575
4576                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4577                         brightness_mode);
4578         }
4579
4580         if (brightness_mode > 3)
4581                 return -EINVAL;
4582
4583         if (brightness_get_raw(&b) < 0)
4584                 return 1;
4585
4586         if (tp_features.bright_16levels)
4587                 printk(TPACPI_INFO
4588                        "detected a 16-level brightness capable ThinkPad\n");
4589
4590         ibm_backlight_device = backlight_device_register(
4591                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4592                                         &ibm_backlight_data);
4593         if (IS_ERR(ibm_backlight_device)) {
4594                 printk(TPACPI_ERR "Could not register backlight device\n");
4595                 return PTR_ERR(ibm_backlight_device);
4596         }
4597         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4598
4599         ibm_backlight_device->props.max_brightness =
4600                                 (tp_features.bright_16levels)? 15 : 7;
4601         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4602         backlight_update_status(ibm_backlight_device);
4603
4604         return 0;
4605 }
4606
4607 static void brightness_exit(void)
4608 {
4609         if (ibm_backlight_device) {
4610                 vdbg_printk(TPACPI_DBG_EXIT,
4611                             "calling backlight_device_unregister()\n");
4612                 backlight_device_unregister(ibm_backlight_device);
4613                 ibm_backlight_device = NULL;
4614         }
4615 }
4616
4617 static int brightness_read(char *p)
4618 {
4619         int len = 0;
4620         int level;
4621
4622         level = brightness_get(NULL);
4623         if (level < 0) {
4624                 len += sprintf(p + len, "level:\t\tunreadable\n");
4625         } else {
4626                 len += sprintf(p + len, "level:\t\t%d\n", level);
4627                 len += sprintf(p + len, "commands:\tup, down\n");
4628                 len += sprintf(p + len, "commands:\tlevel <level>"
4629                                " (<level> is 0-%d)\n",
4630                                (tp_features.bright_16levels) ? 15 : 7);
4631         }
4632
4633         return len;
4634 }
4635
4636 static int brightness_write(char *buf)
4637 {
4638         int level;
4639         int rc;
4640         char *cmd;
4641         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4642
4643         level = brightness_get(NULL);
4644         if (level < 0)
4645                 return level;
4646
4647         while ((cmd = next_cmd(&buf))) {
4648                 if (strlencmp(cmd, "up") == 0) {
4649                         if (level < max_level)
4650                                 level++;
4651                 } else if (strlencmp(cmd, "down") == 0) {
4652                         if (level > 0)
4653                                 level--;
4654                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4655                            level >= 0 && level <= max_level) {
4656                         /* new level set */
4657                 } else
4658                         return -EINVAL;
4659         }
4660
4661         /*
4662          * Now we know what the final level should be, so we try to set it.
4663          * Doing it this way makes the syscall restartable in case of EINTR
4664          */
4665         rc = brightness_set(level);
4666         return (rc == -EINTR)? ERESTARTSYS : rc;
4667 }
4668
4669 static struct ibm_struct brightness_driver_data = {
4670         .name = "brightness",
4671         .read = brightness_read,
4672         .write = brightness_write,
4673         .exit = brightness_exit,
4674 };
4675
4676 /*************************************************************************
4677  * Volume subdriver
4678  */
4679
4680 static int volume_offset = 0x30;
4681
4682 static int volume_read(char *p)
4683 {
4684         int len = 0;
4685         u8 level;
4686
4687         if (!acpi_ec_read(volume_offset, &level)) {
4688                 len += sprintf(p + len, "level:\t\tunreadable\n");
4689         } else {
4690                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4691                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4692                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4693                 len += sprintf(p + len, "commands:\tlevel <level>"
4694                                " (<level> is 0-15)\n");
4695         }
4696
4697         return len;
4698 }
4699
4700 static int volume_write(char *buf)
4701 {
4702         int cmos_cmd, inc, i;
4703         u8 level, mute;
4704         int new_level, new_mute;
4705         char *cmd;
4706
4707         while ((cmd = next_cmd(&buf))) {
4708                 if (!acpi_ec_read(volume_offset, &level))
4709                         return -EIO;
4710                 new_mute = mute = level & 0x40;
4711                 new_level = level = level & 0xf;
4712
4713                 if (strlencmp(cmd, "up") == 0) {
4714                         if (mute)
4715                                 new_mute = 0;
4716                         else
4717                                 new_level = level == 15 ? 15 : level + 1;
4718                 } else if (strlencmp(cmd, "down") == 0) {
4719                         if (mute)
4720                                 new_mute = 0;
4721                         else
4722                                 new_level = level == 0 ? 0 : level - 1;
4723                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4724                            new_level >= 0 && new_level <= 15) {
4725                         /* new_level set */
4726                 } else if (strlencmp(cmd, "mute") == 0) {
4727                         new_mute = 0x40;
4728                 } else
4729                         return -EINVAL;
4730
4731                 if (new_level != level) {
4732                         /* mute doesn't change */
4733
4734                         cmos_cmd = (new_level > level) ?
4735                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4736                         inc = new_level > level ? 1 : -1;
4737
4738                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4739                                      !acpi_ec_write(volume_offset, level)))
4740                                 return -EIO;
4741
4742                         for (i = level; i != new_level; i += inc)
4743                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4744                                     !acpi_ec_write(volume_offset, i + inc))
4745                                         return -EIO;
4746
4747                         if (mute &&
4748                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4749                              !acpi_ec_write(volume_offset, new_level + mute))) {
4750                                 return -EIO;
4751                         }
4752                 }
4753
4754                 if (new_mute != mute) {
4755                         /* level doesn't change */
4756
4757                         cmos_cmd = (new_mute) ?
4758                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4759
4760                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4761                             !acpi_ec_write(volume_offset, level + new_mute))
4762                                 return -EIO;
4763                 }
4764         }
4765
4766         return 0;
4767 }
4768
4769 static struct ibm_struct volume_driver_data = {
4770         .name = "volume",
4771         .read = volume_read,
4772         .write = volume_write,
4773 };
4774
4775 /*************************************************************************
4776  * Fan subdriver
4777  */
4778
4779 /*
4780  * FAN ACCESS MODES
4781  *
4782  * TPACPI_FAN_RD_ACPI_GFAN:
4783  *      ACPI GFAN method: returns fan level
4784  *
4785  *      see TPACPI_FAN_WR_ACPI_SFAN
4786  *      EC 0x2f (HFSP) not available if GFAN exists
4787  *
4788  * TPACPI_FAN_WR_ACPI_SFAN:
4789  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4790  *
4791  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4792  *      it for writing.
4793  *
4794  * TPACPI_FAN_WR_TPEC:
4795  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4796  *      Supported on almost all ThinkPads
4797  *
4798  *      Fan speed changes of any sort (including those caused by the
4799  *      disengaged mode) are usually done slowly by the firmware as the
4800  *      maximum ammount of fan duty cycle change per second seems to be
4801  *      limited.
4802  *
4803  *      Reading is not available if GFAN exists.
4804  *      Writing is not available if SFAN exists.
4805  *
4806  *      Bits
4807  *       7      automatic mode engaged;
4808  *              (default operation mode of the ThinkPad)
4809  *              fan level is ignored in this mode.
4810  *       6      full speed mode (takes precedence over bit 7);
4811  *              not available on all thinkpads.  May disable
4812  *              the tachometer while the fan controller ramps up
4813  *              the speed (which can take up to a few *minutes*).
4814  *              Speeds up fan to 100% duty-cycle, which is far above
4815  *              the standard RPM levels.  It is not impossible that
4816  *              it could cause hardware damage.
4817  *      5-3     unused in some models.  Extra bits for fan level
4818  *              in others, but still useless as all values above
4819  *              7 map to the same speed as level 7 in these models.
4820  *      2-0     fan level (0..7 usually)
4821  *                      0x00 = stop
4822  *                      0x07 = max (set when temperatures critical)
4823  *              Some ThinkPads may have other levels, see
4824  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4825  *
4826  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4827  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4828  *      does so, its initial value is meaningless (0x07).
4829  *
4830  *      For firmware bugs, refer to:
4831  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4832  *
4833  *      ----
4834  *
4835  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4836  *      Main fan tachometer reading (in RPM)
4837  *
4838  *      This register is present on all ThinkPads with a new-style EC, and
4839  *      it is known not to be present on the A21m/e, and T22, as there is
4840  *      something else in offset 0x84 according to the ACPI DSDT.  Other
4841  *      ThinkPads from this same time period (and earlier) probably lack the
4842  *      tachometer as well.
4843  *
4844  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4845  *      was never fixed by IBM to report the EC firmware version string
4846  *      probably support the tachometer (like the early X models), so
4847  *      detecting it is quite hard.  We need more data to know for sure.
4848  *
4849  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4850  *      might result.
4851  *
4852  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
4853  *      mode.
4854  *
4855  *      For firmware bugs, refer to:
4856  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4857  *
4858  * TPACPI_FAN_WR_ACPI_FANS:
4859  *      ThinkPad X31, X40, X41.  Not available in the X60.
4860  *
4861  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
4862  *      high speed.  ACPI DSDT seems to map these three speeds to levels
4863  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4864  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4865  *
4866  *      The speeds are stored on handles
4867  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4868  *
4869  *      There are three default speed sets, acessible as handles:
4870  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4871  *
4872  *      ACPI DSDT switches which set is in use depending on various
4873  *      factors.
4874  *
4875  *      TPACPI_FAN_WR_TPEC is also available and should be used to
4876  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
4877  *      but the ACPI tables just mention level 7.
4878  */
4879
4880 enum {                                  /* Fan control constants */
4881         fan_status_offset = 0x2f,       /* EC register 0x2f */
4882         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
4883                                          * 0x84 must be read before 0x85 */
4884
4885         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
4886         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
4887
4888         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
4889 };
4890
4891 enum fan_status_access_mode {
4892         TPACPI_FAN_NONE = 0,            /* No fan status or control */
4893         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
4894         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4895 };
4896
4897 enum fan_control_access_mode {
4898         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
4899         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
4900         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
4901         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
4902 };
4903
4904 enum fan_control_commands {
4905         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
4906         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
4907         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
4908                                                  * and also watchdog cmd */
4909 };
4910
4911 static int fan_control_allowed;
4912
4913 static enum fan_status_access_mode fan_status_access_mode;
4914 static enum fan_control_access_mode fan_control_access_mode;
4915 static enum fan_control_commands fan_control_commands;
4916
4917 static u8 fan_control_initial_status;
4918 static u8 fan_control_desired_level;
4919 static int fan_watchdog_maxinterval;
4920
4921 static struct mutex fan_mutex;
4922
4923 static void fan_watchdog_fire(struct work_struct *ignored);
4924 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4925
4926 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
4927 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4928            "\\FSPD",            /* 600e/x, 770e, 770x */
4929            );                   /* all others */
4930 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4931            "JFNS",              /* 770x-JL */
4932            );                   /* all others */
4933
4934 /*
4935  * Call with fan_mutex held
4936  */
4937 static void fan_update_desired_level(u8 status)
4938 {
4939         if ((status &
4940              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4941                 if (status > 7)
4942                         fan_control_desired_level = 7;
4943                 else
4944                         fan_control_desired_level = status;
4945         }
4946 }
4947
4948 static int fan_get_status(u8 *status)
4949 {
4950         u8 s;
4951
4952         /* TODO:
4953          * Add TPACPI_FAN_RD_ACPI_FANS ? */
4954
4955         switch (fan_status_access_mode) {
4956         case TPACPI_FAN_RD_ACPI_GFAN:
4957                 /* 570, 600e/x, 770e, 770x */
4958
4959                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4960                         return -EIO;
4961
4962                 if (likely(status))
4963                         *status = s & 0x07;
4964
4965                 break;
4966
4967         case TPACPI_FAN_RD_TPEC:
4968                 /* all except 570, 600e/x, 770e, 770x */
4969                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4970                         return -EIO;
4971
4972                 if (likely(status))
4973                         *status = s;
4974
4975                 break;
4976
4977         default:
4978                 return -ENXIO;
4979         }
4980
4981         return 0;
4982 }
4983
4984 static int fan_get_status_safe(u8 *status)
4985 {
4986         int rc;
4987         u8 s;
4988
4989         if (mutex_lock_interruptible(&fan_mutex))
4990                 return -ERESTARTSYS;
4991         rc = fan_get_status(&s);
4992         if (!rc)
4993                 fan_update_desired_level(s);
4994         mutex_unlock(&fan_mutex);
4995
4996         if (status)
4997                 *status = s;
4998
4999         return rc;
5000 }
5001
5002 static int fan_get_speed(unsigned int *speed)
5003 {
5004         u8 hi, lo;
5005
5006         switch (fan_status_access_mode) {
5007         case TPACPI_FAN_RD_TPEC:
5008                 /* all except 570, 600e/x, 770e, 770x */
5009                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5010                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5011                         return -EIO;
5012
5013                 if (likely(speed))
5014                         *speed = (hi << 8) | lo;
5015
5016                 break;
5017
5018         default:
5019                 return -ENXIO;
5020         }
5021
5022         return 0;
5023 }
5024
5025 static int fan_set_level(int level)
5026 {
5027         if (!fan_control_allowed)
5028                 return -EPERM;
5029
5030         switch (fan_control_access_mode) {
5031         case TPACPI_FAN_WR_ACPI_SFAN:
5032                 if (level >= 0 && level <= 7) {
5033                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5034                                 return -EIO;
5035                 } else
5036                         return -EINVAL;
5037                 break;
5038
5039         case TPACPI_FAN_WR_ACPI_FANS:
5040         case TPACPI_FAN_WR_TPEC:
5041                 if ((level != TP_EC_FAN_AUTO) &&
5042                     (level != TP_EC_FAN_FULLSPEED) &&
5043                     ((level < 0) || (level > 7)))
5044                         return -EINVAL;
5045
5046                 /* safety net should the EC not support AUTO
5047                  * or FULLSPEED mode bits and just ignore them */
5048                 if (level & TP_EC_FAN_FULLSPEED)
5049                         level |= 7;     /* safety min speed 7 */
5050                 else if (level & TP_EC_FAN_AUTO)
5051                         level |= 4;     /* safety min speed 4 */
5052
5053                 if (!acpi_ec_write(fan_status_offset, level))
5054                         return -EIO;
5055                 else
5056                         tp_features.fan_ctrl_status_undef = 0;
5057                 break;
5058
5059         default:
5060                 return -ENXIO;
5061         }
5062         return 0;
5063 }
5064
5065 static int fan_set_level_safe(int level)
5066 {
5067         int rc;
5068
5069         if (!fan_control_allowed)
5070                 return -EPERM;
5071
5072         if (mutex_lock_interruptible(&fan_mutex))
5073                 return -ERESTARTSYS;
5074
5075         if (level == TPACPI_FAN_LAST_LEVEL)
5076                 level = fan_control_desired_level;
5077
5078         rc = fan_set_level(level);
5079         if (!rc)
5080                 fan_update_desired_level(level);
5081
5082         mutex_unlock(&fan_mutex);
5083         return rc;
5084 }
5085
5086 static int fan_set_enable(void)
5087 {
5088         u8 s;
5089         int rc;
5090
5091         if (!fan_control_allowed)
5092                 return -EPERM;
5093
5094         if (mutex_lock_interruptible(&fan_mutex))
5095                 return -ERESTARTSYS;
5096
5097         switch (fan_control_access_mode) {
5098         case TPACPI_FAN_WR_ACPI_FANS:
5099         case TPACPI_FAN_WR_TPEC:
5100                 rc = fan_get_status(&s);
5101                 if (rc < 0)
5102                         break;
5103
5104                 /* Don't go out of emergency fan mode */
5105                 if (s != 7) {
5106                         s &= 0x07;
5107                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5108                 }
5109
5110                 if (!acpi_ec_write(fan_status_offset, s))
5111                         rc = -EIO;
5112                 else {
5113                         tp_features.fan_ctrl_status_undef = 0;
5114                         rc = 0;
5115                 }
5116                 break;
5117
5118         case TPACPI_FAN_WR_ACPI_SFAN:
5119                 rc = fan_get_status(&s);
5120                 if (rc < 0)
5121                         break;
5122
5123                 s &= 0x07;
5124
5125                 /* Set fan to at least level 4 */
5126                 s |= 4;
5127
5128                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5129                         rc = -EIO;
5130                 else
5131                         rc = 0;
5132                 break;
5133
5134         default:
5135                 rc = -ENXIO;
5136         }
5137
5138         mutex_unlock(&fan_mutex);
5139         return rc;
5140 }
5141
5142 static int fan_set_disable(void)
5143 {
5144         int rc;
5145
5146         if (!fan_control_allowed)
5147                 return -EPERM;
5148
5149         if (mutex_lock_interruptible(&fan_mutex))
5150                 return -ERESTARTSYS;
5151
5152         rc = 0;
5153         switch (fan_control_access_mode) {
5154         case TPACPI_FAN_WR_ACPI_FANS:
5155         case TPACPI_FAN_WR_TPEC:
5156                 if (!acpi_ec_write(fan_status_offset, 0x00))
5157                         rc = -EIO;
5158                 else {
5159                         fan_control_desired_level = 0;
5160                         tp_features.fan_ctrl_status_undef = 0;
5161                 }
5162                 break;
5163
5164         case TPACPI_FAN_WR_ACPI_SFAN:
5165                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5166                         rc = -EIO;
5167                 else
5168                         fan_control_desired_level = 0;
5169                 break;
5170
5171         default:
5172                 rc = -ENXIO;
5173         }
5174
5175
5176         mutex_unlock(&fan_mutex);
5177         return rc;
5178 }
5179
5180 static int fan_set_speed(int speed)
5181 {
5182         int rc;
5183
5184         if (!fan_control_allowed)
5185                 return -EPERM;
5186
5187         if (mutex_lock_interruptible(&fan_mutex))
5188                 return -ERESTARTSYS;
5189
5190         rc = 0;
5191         switch (fan_control_access_mode) {
5192         case TPACPI_FAN_WR_ACPI_FANS:
5193                 if (speed >= 0 && speed <= 65535) {
5194                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5195                                         speed, speed, speed))
5196                                 rc = -EIO;
5197                 } else
5198                         rc = -EINVAL;
5199                 break;
5200
5201         default:
5202                 rc = -ENXIO;
5203         }
5204
5205         mutex_unlock(&fan_mutex);
5206         return rc;
5207 }
5208
5209 static void fan_watchdog_reset(void)
5210 {
5211         static int fan_watchdog_active;
5212
5213         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5214                 return;
5215
5216         if (fan_watchdog_active)
5217                 cancel_delayed_work(&fan_watchdog_task);
5218
5219         if (fan_watchdog_maxinterval > 0 &&
5220             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5221                 fan_watchdog_active = 1;
5222                 if (!schedule_delayed_work(&fan_watchdog_task,
5223                                 msecs_to_jiffies(fan_watchdog_maxinterval
5224                                                  * 1000))) {
5225                         printk(TPACPI_ERR
5226                                "failed to schedule the fan watchdog, "
5227                                "watchdog will not trigger\n");
5228                 }
5229         } else
5230                 fan_watchdog_active = 0;
5231 }
5232
5233 static void fan_watchdog_fire(struct work_struct *ignored)
5234 {
5235         int rc;
5236
5237         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5238                 return;
5239
5240         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5241         rc = fan_set_enable();
5242         if (rc < 0) {
5243                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5244                         "will try again later...\n", -rc);
5245                 /* reschedule for later */
5246                 fan_watchdog_reset();
5247         }
5248 }
5249
5250 /*
5251  * SYSFS fan layout: hwmon compatible (device)
5252  *
5253  * pwm*_enable:
5254  *      0: "disengaged" mode
5255  *      1: manual mode
5256  *      2: native EC "auto" mode (recommended, hardware default)
5257  *
5258  * pwm*: set speed in manual mode, ignored otherwise.
5259  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5260  *      interpolation.
5261  *
5262  * fan*_input: tachometer reading, RPM
5263  *
5264  *
5265  * SYSFS fan layout: extensions
5266  *
5267  * fan_watchdog (driver):
5268  *      fan watchdog interval in seconds, 0 disables (default), max 120
5269  */
5270
5271 /* sysfs fan pwm1_enable ----------------------------------------------- */
5272 static ssize_t fan_pwm1_enable_show(struct device *dev,
5273                                     struct device_attribute *attr,
5274                                     char *buf)
5275 {
5276         int res, mode;
5277         u8 status;
5278
5279         res = fan_get_status_safe(&status);
5280         if (res)
5281                 return res;
5282
5283         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5284                 if (status != fan_control_initial_status) {
5285                         tp_features.fan_ctrl_status_undef = 0;
5286                 } else {
5287                         /* Return most likely status. In fact, it
5288                          * might be the only possible status */
5289                         status = TP_EC_FAN_AUTO;
5290                 }
5291         }
5292
5293         if (status & TP_EC_FAN_FULLSPEED) {
5294                 mode = 0;
5295         } else if (status & TP_EC_FAN_AUTO) {
5296                 mode = 2;
5297         } else
5298                 mode = 1;
5299
5300         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5301 }
5302
5303 static ssize_t fan_pwm1_enable_store(struct device *dev,
5304                                      struct device_attribute *attr,
5305                                      const char *buf, size_t count)
5306 {
5307         unsigned long t;
5308         int res, level;
5309
5310         if (parse_strtoul(buf, 2, &t))
5311                 return -EINVAL;
5312
5313         switch (t) {
5314         case 0:
5315                 level = TP_EC_FAN_FULLSPEED;
5316                 break;
5317         case 1:
5318                 level = TPACPI_FAN_LAST_LEVEL;
5319                 break;
5320         case 2:
5321                 level = TP_EC_FAN_AUTO;
5322                 break;
5323         case 3:
5324                 /* reserved for software-controlled auto mode */
5325                 return -ENOSYS;
5326         default:
5327                 return -EINVAL;
5328         }
5329
5330         res = fan_set_level_safe(level);
5331         if (res == -ENXIO)
5332                 return -EINVAL;
5333         else if (res < 0)
5334                 return res;
5335
5336         fan_watchdog_reset();
5337
5338         return count;
5339 }
5340
5341 static struct device_attribute dev_attr_fan_pwm1_enable =
5342         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5343                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5344
5345 /* sysfs fan pwm1 ------------------------------------------------------ */
5346 static ssize_t fan_pwm1_show(struct device *dev,
5347                              struct device_attribute *attr,
5348                              char *buf)
5349 {
5350         int res;
5351         u8 status;
5352
5353         res = fan_get_status_safe(&status);
5354         if (res)
5355                 return res;
5356
5357         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5358                 if (status != fan_control_initial_status) {
5359                         tp_features.fan_ctrl_status_undef = 0;
5360                 } else {
5361                         status = TP_EC_FAN_AUTO;
5362                 }
5363         }
5364
5365         if ((status &
5366              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5367                 status = fan_control_desired_level;
5368
5369         if (status > 7)
5370                 status = 7;
5371
5372         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5373 }
5374
5375 static ssize_t fan_pwm1_store(struct device *dev,
5376                               struct device_attribute *attr,
5377                               const char *buf, size_t count)
5378 {
5379         unsigned long s;
5380         int rc;
5381         u8 status, newlevel;
5382
5383         if (parse_strtoul(buf, 255, &s))
5384                 return -EINVAL;
5385
5386         /* scale down from 0-255 to 0-7 */
5387         newlevel = (s >> 5) & 0x07;
5388
5389         if (mutex_lock_interruptible(&fan_mutex))
5390                 return -ERESTARTSYS;
5391
5392         rc = fan_get_status(&status);
5393         if (!rc && (status &
5394                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5395                 rc = fan_set_level(newlevel);
5396                 if (rc == -ENXIO)
5397                         rc = -EINVAL;
5398                 else if (!rc) {
5399                         fan_update_desired_level(newlevel);
5400                         fan_watchdog_reset();
5401                 }
5402         }
5403
5404         mutex_unlock(&fan_mutex);
5405         return (rc)? rc : count;
5406 }
5407
5408 static struct device_attribute dev_attr_fan_pwm1 =
5409         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5410                 fan_pwm1_show, fan_pwm1_store);
5411
5412 /* sysfs fan fan1_input ------------------------------------------------ */
5413 static ssize_t fan_fan1_input_show(struct device *dev,
5414                            struct device_attribute *attr,
5415                            char *buf)
5416 {
5417         int res;
5418         unsigned int speed;
5419
5420         res = fan_get_speed(&speed);
5421         if (res < 0)
5422                 return res;
5423
5424         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5425 }
5426
5427 static struct device_attribute dev_attr_fan_fan1_input =
5428         __ATTR(fan1_input, S_IRUGO,
5429                 fan_fan1_input_show, NULL);
5430
5431 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5432 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5433                                      char *buf)
5434 {
5435         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5436 }
5437
5438 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5439                                       const char *buf, size_t count)
5440 {
5441         unsigned long t;
5442
5443         if (parse_strtoul(buf, 120, &t))
5444                 return -EINVAL;
5445
5446         if (!fan_control_allowed)
5447                 return -EPERM;
5448
5449         fan_watchdog_maxinterval = t;
5450         fan_watchdog_reset();
5451
5452         return count;
5453 }
5454
5455 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5456                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5457
5458 /* --------------------------------------------------------------------- */
5459 static struct attribute *fan_attributes[] = {
5460         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5461         &dev_attr_fan_fan1_input.attr,
5462         NULL
5463 };
5464
5465 static const struct attribute_group fan_attr_group = {
5466         .attrs = fan_attributes,
5467 };
5468
5469 static int __init fan_init(struct ibm_init_struct *iibm)
5470 {
5471         int rc;
5472
5473         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5474
5475         mutex_init(&fan_mutex);
5476         fan_status_access_mode = TPACPI_FAN_NONE;
5477         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5478         fan_control_commands = 0;
5479         fan_watchdog_maxinterval = 0;
5480         tp_features.fan_ctrl_status_undef = 0;
5481         fan_control_desired_level = 7;
5482
5483         TPACPI_ACPIHANDLE_INIT(fans);
5484         TPACPI_ACPIHANDLE_INIT(gfan);
5485         TPACPI_ACPIHANDLE_INIT(sfan);
5486
5487         if (gfan_handle) {
5488                 /* 570, 600e/x, 770e, 770x */
5489                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5490         } else {
5491                 /* all other ThinkPads: note that even old-style
5492                  * ThinkPad ECs supports the fan control register */
5493                 if (likely(acpi_ec_read(fan_status_offset,
5494                                         &fan_control_initial_status))) {
5495                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5496
5497                         /* In some ThinkPads, neither the EC nor the ACPI
5498                          * DSDT initialize the fan status, and it ends up
5499                          * being set to 0x07 when it *could* be either
5500                          * 0x07 or 0x80.
5501                          *
5502                          * Enable for TP-1Y (T43), TP-78 (R51e),
5503                          * TP-76 (R52), TP-70 (T43, R52), which are known
5504                          * to be buggy. */
5505                         if (fan_control_initial_status == 0x07) {
5506                                 switch (thinkpad_id.ec_model) {
5507                                 case 0x5931: /* TP-1Y */
5508                                 case 0x3837: /* TP-78 */
5509                                 case 0x3637: /* TP-76 */
5510                                 case 0x3037: /* TP-70 */
5511                                         printk(TPACPI_NOTICE
5512                                                "fan_init: initial fan status "
5513                                                "is unknown, assuming it is "
5514                                                "in auto mode\n");
5515                                         tp_features.fan_ctrl_status_undef = 1;
5516                                         ;;
5517                                 }
5518                         }
5519                 } else {
5520                         printk(TPACPI_ERR
5521                                "ThinkPad ACPI EC access misbehaving, "
5522                                "fan status and control unavailable\n");
5523                         return 1;
5524                 }
5525         }
5526
5527         if (sfan_handle) {
5528                 /* 570, 770x-JL */
5529                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5530                 fan_control_commands |=
5531                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5532         } else {
5533                 if (!gfan_handle) {
5534                         /* gfan without sfan means no fan control */
5535                         /* all other models implement TP EC 0x2f control */
5536
5537                         if (fans_handle) {
5538                                 /* X31, X40, X41 */
5539                                 fan_control_access_mode =
5540                                     TPACPI_FAN_WR_ACPI_FANS;
5541                                 fan_control_commands |=
5542                                     TPACPI_FAN_CMD_SPEED |
5543                                     TPACPI_FAN_CMD_LEVEL |
5544                                     TPACPI_FAN_CMD_ENABLE;
5545                         } else {
5546                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5547                                 fan_control_commands |=
5548                                     TPACPI_FAN_CMD_LEVEL |
5549                                     TPACPI_FAN_CMD_ENABLE;
5550                         }
5551                 }
5552         }
5553
5554         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5555                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5556                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5557                 fan_status_access_mode, fan_control_access_mode);
5558
5559         /* fan control master switch */
5560         if (!fan_control_allowed) {
5561                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5562                 fan_control_commands = 0;
5563                 dbg_printk(TPACPI_DBG_INIT,
5564                            "fan control features disabled by parameter\n");
5565         }
5566
5567         /* update fan_control_desired_level */
5568         if (fan_status_access_mode != TPACPI_FAN_NONE)
5569                 fan_get_status_safe(NULL);
5570
5571         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5572             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5573                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5574                                          &fan_attr_group);
5575                 if (!(rc < 0))
5576                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5577                                         &driver_attr_fan_watchdog);
5578                 if (rc < 0)
5579                         return rc;
5580                 return 0;
5581         } else
5582                 return 1;
5583 }
5584
5585 static void fan_exit(void)
5586 {
5587         vdbg_printk(TPACPI_DBG_EXIT,
5588                     "cancelling any pending fan watchdog tasks\n");
5589
5590         /* FIXME: can we really do this unconditionally? */
5591         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5592         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5593                            &driver_attr_fan_watchdog);
5594
5595         cancel_delayed_work(&fan_watchdog_task);
5596         flush_scheduled_work();
5597 }
5598
5599 static int fan_read(char *p)
5600 {
5601         int len = 0;
5602         int rc;
5603         u8 status;
5604         unsigned int speed = 0;
5605
5606         switch (fan_status_access_mode) {
5607         case TPACPI_FAN_RD_ACPI_GFAN:
5608                 /* 570, 600e/x, 770e, 770x */
5609                 rc = fan_get_status_safe(&status);
5610                 if (rc < 0)
5611                         return rc;
5612
5613                 len += sprintf(p + len, "status:\t\t%s\n"
5614                                "level:\t\t%d\n",
5615                                (status != 0) ? "enabled" : "disabled", status);
5616                 break;
5617
5618         case TPACPI_FAN_RD_TPEC:
5619                 /* all except 570, 600e/x, 770e, 770x */
5620                 rc = fan_get_status_safe(&status);
5621                 if (rc < 0)
5622                         return rc;
5623
5624                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5625                         if (status != fan_control_initial_status)
5626                                 tp_features.fan_ctrl_status_undef = 0;
5627                         else
5628                                 /* Return most likely status. In fact, it
5629                                  * might be the only possible status */
5630                                 status = TP_EC_FAN_AUTO;
5631                 }
5632
5633                 len += sprintf(p + len, "status:\t\t%s\n",
5634                                (status != 0) ? "enabled" : "disabled");
5635
5636                 rc = fan_get_speed(&speed);
5637                 if (rc < 0)
5638                         return rc;
5639
5640                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5641
5642                 if (status & TP_EC_FAN_FULLSPEED)
5643                         /* Disengaged mode takes precedence */
5644                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5645                 else if (status & TP_EC_FAN_AUTO)
5646                         len += sprintf(p + len, "level:\t\tauto\n");
5647                 else
5648                         len += sprintf(p + len, "level:\t\t%d\n", status);
5649                 break;
5650
5651         case TPACPI_FAN_NONE:
5652         default:
5653                 len += sprintf(p + len, "status:\t\tnot supported\n");
5654         }
5655
5656         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5657                 len += sprintf(p + len, "commands:\tlevel <level>");
5658
5659                 switch (fan_control_access_mode) {
5660                 case TPACPI_FAN_WR_ACPI_SFAN:
5661                         len += sprintf(p + len, " (<level> is 0-7)\n");
5662                         break;
5663
5664                 default:
5665                         len += sprintf(p + len, " (<level> is 0-7, "
5666                                        "auto, disengaged, full-speed)\n");
5667                         break;
5668                 }
5669         }
5670
5671         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5672                 len += sprintf(p + len, "commands:\tenable, disable\n"
5673                                "commands:\twatchdog <timeout> (<timeout> "
5674                                "is 0 (off), 1-120 (seconds))\n");
5675
5676         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5677                 len += sprintf(p + len, "commands:\tspeed <speed>"
5678                                " (<speed> is 0-65535)\n");
5679
5680         return len;
5681 }
5682
5683 static int fan_write_cmd_level(const char *cmd, int *rc)
5684 {
5685         int level;
5686
5687         if (strlencmp(cmd, "level auto") == 0)
5688                 level = TP_EC_FAN_AUTO;
5689         else if ((strlencmp(cmd, "level disengaged") == 0) |
5690                         (strlencmp(cmd, "level full-speed") == 0))
5691                 level = TP_EC_FAN_FULLSPEED;
5692         else if (sscanf(cmd, "level %d", &level) != 1)
5693                 return 0;
5694
5695         *rc = fan_set_level_safe(level);
5696         if (*rc == -ENXIO)
5697                 printk(TPACPI_ERR "level command accepted for unsupported "
5698                        "access mode %d", fan_control_access_mode);
5699
5700         return 1;
5701 }
5702
5703 static int fan_write_cmd_enable(const char *cmd, int *rc)
5704 {
5705         if (strlencmp(cmd, "enable") != 0)
5706                 return 0;
5707
5708         *rc = fan_set_enable();
5709         if (*rc == -ENXIO)
5710                 printk(TPACPI_ERR "enable command accepted for unsupported "
5711                        "access mode %d", fan_control_access_mode);
5712
5713         return 1;
5714 }
5715
5716 static int fan_write_cmd_disable(const char *cmd, int *rc)
5717 {
5718         if (strlencmp(cmd, "disable") != 0)
5719                 return 0;
5720
5721         *rc = fan_set_disable();
5722         if (*rc == -ENXIO)
5723                 printk(TPACPI_ERR "disable command accepted for unsupported "
5724                        "access mode %d", fan_control_access_mode);
5725
5726         return 1;
5727 }
5728
5729 static int fan_write_cmd_speed(const char *cmd, int *rc)
5730 {
5731         int speed;
5732
5733         /* TODO:
5734          * Support speed <low> <medium> <high> ? */
5735
5736         if (sscanf(cmd, "speed %d", &speed) != 1)
5737                 return 0;
5738
5739         *rc = fan_set_speed(speed);
5740         if (*rc == -ENXIO)
5741                 printk(TPACPI_ERR "speed command accepted for unsupported "
5742                        "access mode %d", fan_control_access_mode);
5743
5744         return 1;
5745 }
5746
5747 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5748 {
5749         int interval;
5750
5751         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5752                 return 0;
5753
5754         if (interval < 0 || interval > 120)
5755                 *rc = -EINVAL;
5756         else
5757                 fan_watchdog_maxinterval = interval;
5758
5759         return 1;
5760 }
5761
5762 static int fan_write(char *buf)
5763 {
5764         char *cmd;
5765         int rc = 0;
5766
5767         while (!rc && (cmd = next_cmd(&buf))) {
5768                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5769                       fan_write_cmd_level(cmd, &rc)) &&
5770                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5771                       (fan_write_cmd_enable(cmd, &rc) ||
5772                        fan_write_cmd_disable(cmd, &rc) ||
5773                        fan_write_cmd_watchdog(cmd, &rc))) &&
5774                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5775                       fan_write_cmd_speed(cmd, &rc))
5776                     )
5777                         rc = -EINVAL;
5778                 else if (!rc)
5779                         fan_watchdog_reset();
5780         }
5781
5782         return rc;
5783 }
5784
5785 static struct ibm_struct fan_driver_data = {
5786         .name = "fan",
5787         .read = fan_read,
5788         .write = fan_write,
5789         .exit = fan_exit,
5790 };
5791
5792 /****************************************************************************
5793  ****************************************************************************
5794  *
5795  * Infrastructure
5796  *
5797  ****************************************************************************
5798  ****************************************************************************/
5799
5800 /* sysfs name ---------------------------------------------------------- */
5801 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5802                            struct device_attribute *attr,
5803                            char *buf)
5804 {
5805         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5806 }
5807
5808 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5809         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5810
5811 /* --------------------------------------------------------------------- */
5812
5813 /* /proc support */
5814 static struct proc_dir_entry *proc_dir;
5815
5816 /*
5817  * Module and infrastructure proble, init and exit handling
5818  */
5819
5820 static int force_load;
5821
5822 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5823 static const char * __init str_supported(int is_supported)
5824 {
5825         static char text_unsupported[] __initdata = "not supported";
5826
5827         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5828 }
5829 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5830
5831 static void ibm_exit(struct ibm_struct *ibm)
5832 {
5833         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5834
5835         list_del_init(&ibm->all_drivers);
5836
5837         if (ibm->flags.acpi_notify_installed) {
5838                 dbg_printk(TPACPI_DBG_EXIT,
5839                         "%s: acpi_remove_notify_handler\n", ibm->name);
5840                 BUG_ON(!ibm->acpi);
5841                 acpi_remove_notify_handler(*ibm->acpi->handle,
5842                                            ibm->acpi->type,
5843                                            dispatch_acpi_notify);
5844                 ibm->flags.acpi_notify_installed = 0;
5845                 ibm->flags.acpi_notify_installed = 0;
5846         }
5847
5848         if (ibm->flags.proc_created) {
5849                 dbg_printk(TPACPI_DBG_EXIT,
5850                         "%s: remove_proc_entry\n", ibm->name);
5851                 remove_proc_entry(ibm->name, proc_dir);
5852                 ibm->flags.proc_created = 0;
5853         }
5854
5855         if (ibm->flags.acpi_driver_registered) {
5856                 dbg_printk(TPACPI_DBG_EXIT,
5857                         "%s: acpi_bus_unregister_driver\n", ibm->name);
5858                 BUG_ON(!ibm->acpi);
5859                 acpi_bus_unregister_driver(ibm->acpi->driver);
5860                 kfree(ibm->acpi->driver);
5861                 ibm->acpi->driver = NULL;
5862                 ibm->flags.acpi_driver_registered = 0;
5863         }
5864
5865         if (ibm->flags.init_called && ibm->exit) {
5866                 ibm->exit();
5867                 ibm->flags.init_called = 0;
5868         }
5869
5870         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5871 }
5872
5873 static int __init ibm_init(struct ibm_init_struct *iibm)
5874 {
5875         int ret;
5876         struct ibm_struct *ibm = iibm->data;
5877         struct proc_dir_entry *entry;
5878
5879         BUG_ON(ibm == NULL);
5880
5881         INIT_LIST_HEAD(&ibm->all_drivers);
5882
5883         if (ibm->flags.experimental && !experimental)
5884                 return 0;
5885
5886         dbg_printk(TPACPI_DBG_INIT,
5887                 "probing for %s\n", ibm->name);
5888
5889         if (iibm->init) {
5890                 ret = iibm->init(iibm);
5891                 if (ret > 0)
5892                         return 0;       /* probe failed */
5893                 if (ret)
5894                         return ret;
5895
5896                 ibm->flags.init_called = 1;
5897         }
5898
5899         if (ibm->acpi) {
5900                 if (ibm->acpi->hid) {
5901                         ret = register_tpacpi_subdriver(ibm);
5902                         if (ret)
5903                                 goto err_out;
5904                 }
5905
5906                 if (ibm->acpi->notify) {
5907                         ret = setup_acpi_notify(ibm);
5908                         if (ret == -ENODEV) {
5909                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5910                                         ibm->name);
5911                                 ret = 0;
5912                                 goto err_out;
5913                         }
5914                         if (ret < 0)
5915                                 goto err_out;
5916                 }
5917         }
5918
5919         dbg_printk(TPACPI_DBG_INIT,
5920                 "%s installed\n", ibm->name);
5921
5922         if (ibm->read) {
5923                 entry = create_proc_entry(ibm->name,
5924                                           S_IFREG | S_IRUGO | S_IWUSR,
5925                                           proc_dir);
5926                 if (!entry) {
5927                         printk(TPACPI_ERR "unable to create proc entry %s\n",
5928                                ibm->name);
5929                         ret = -ENODEV;
5930                         goto err_out;
5931                 }
5932                 entry->owner = THIS_MODULE;
5933                 entry->data = ibm;
5934                 entry->read_proc = &dispatch_procfs_read;
5935                 if (ibm->write)
5936                         entry->write_proc = &dispatch_procfs_write;
5937                 ibm->flags.proc_created = 1;
5938         }
5939
5940         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5941
5942         return 0;
5943
5944 err_out:
5945         dbg_printk(TPACPI_DBG_INIT,
5946                 "%s: at error exit path with result %d\n",
5947                 ibm->name, ret);
5948
5949         ibm_exit(ibm);
5950         return (ret < 0)? ret : 0;
5951 }
5952
5953 /* Probing */
5954
5955 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5956 {
5957         const struct dmi_device *dev = NULL;
5958         char ec_fw_string[18];
5959
5960         if (!tp)
5961                 return;
5962
5963         memset(tp, 0, sizeof(*tp));
5964
5965         if (dmi_name_in_vendors("IBM"))
5966                 tp->vendor = PCI_VENDOR_ID_IBM;
5967         else if (dmi_name_in_vendors("LENOVO"))
5968                 tp->vendor = PCI_VENDOR_ID_LENOVO;
5969         else
5970                 return;
5971
5972         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5973                                         GFP_KERNEL);
5974         if (!tp->bios_version_str)
5975                 return;
5976         tp->bios_model = tp->bios_version_str[0]
5977                          | (tp->bios_version_str[1] << 8);
5978
5979         /*
5980          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5981          * X32 or newer, all Z series;  Some models must have an
5982          * up-to-date BIOS or they will not be detected.
5983          *
5984          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5985          */
5986         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5987                 if (sscanf(dev->name,
5988                            "IBM ThinkPad Embedded Controller -[%17c",
5989                            ec_fw_string) == 1) {
5990                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5991                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5992
5993                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5994                         tp->ec_model = ec_fw_string[0]
5995                                         | (ec_fw_string[1] << 8);
5996                         break;
5997                 }
5998         }
5999
6000         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
6001                                         GFP_KERNEL);
6002         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
6003                 kfree(tp->model_str);
6004                 tp->model_str = NULL;
6005         }
6006
6007         tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
6008                                         GFP_KERNEL);
6009 }
6010
6011 static int __init probe_for_thinkpad(void)
6012 {
6013         int is_thinkpad;
6014
6015         if (acpi_disabled)
6016                 return -ENODEV;
6017
6018         /*
6019          * Non-ancient models have better DMI tagging, but very old models
6020          * don't.
6021          */
6022         is_thinkpad = (thinkpad_id.model_str != NULL);
6023
6024         /* ec is required because many other handles are relative to it */
6025         TPACPI_ACPIHANDLE_INIT(ec);
6026         if (!ec_handle) {
6027                 if (is_thinkpad)
6028                         printk(TPACPI_ERR
6029                                 "Not yet supported ThinkPad detected!\n");
6030                 return -ENODEV;
6031         }
6032
6033         /*
6034          * Risks a regression on very old machines, but reduces potential
6035          * false positives a damn great deal
6036          */
6037         if (!is_thinkpad)
6038                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6039
6040         if (!is_thinkpad && !force_load)
6041                 return -ENODEV;
6042
6043         return 0;
6044 }
6045
6046
6047 /* Module init, exit, parameters */
6048
6049 static struct ibm_init_struct ibms_init[] __initdata = {
6050         {
6051                 .init = thinkpad_acpi_driver_init,
6052                 .data = &thinkpad_acpi_driver_data,
6053         },
6054         {
6055                 .init = hotkey_init,
6056                 .data = &hotkey_driver_data,
6057         },
6058         {
6059                 .init = bluetooth_init,
6060                 .data = &bluetooth_driver_data,
6061         },
6062         {
6063                 .init = wan_init,
6064                 .data = &wan_driver_data,
6065         },
6066 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6067         {
6068                 .init = video_init,
6069                 .data = &video_driver_data,
6070         },
6071 #endif
6072         {
6073                 .init = light_init,
6074                 .data = &light_driver_data,
6075         },
6076 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6077         {
6078                 .init = dock_init,
6079                 .data = &dock_driver_data[0],
6080         },
6081         {
6082                 .init = dock_init2,
6083                 .data = &dock_driver_data[1],
6084         },
6085 #endif
6086 #ifdef CONFIG_THINKPAD_ACPI_BAY
6087         {
6088                 .init = bay_init,
6089                 .data = &bay_driver_data,
6090         },
6091 #endif
6092         {
6093                 .init = cmos_init,
6094                 .data = &cmos_driver_data,
6095         },
6096         {
6097                 .init = led_init,
6098                 .data = &led_driver_data,
6099         },
6100         {
6101                 .init = beep_init,
6102                 .data = &beep_driver_data,
6103         },
6104         {
6105                 .init = thermal_init,
6106                 .data = &thermal_driver_data,
6107         },
6108         {
6109                 .data = &ecdump_driver_data,
6110         },
6111         {
6112                 .init = brightness_init,
6113                 .data = &brightness_driver_data,
6114         },
6115         {
6116                 .data = &volume_driver_data,
6117         },
6118         {
6119                 .init = fan_init,
6120                 .data = &fan_driver_data,
6121         },
6122 };
6123
6124 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6125 {
6126         unsigned int i;
6127         struct ibm_struct *ibm;
6128
6129         if (!kp || !kp->name || !val)
6130                 return -EINVAL;
6131
6132         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6133                 ibm = ibms_init[i].data;
6134                 WARN_ON(ibm == NULL);
6135
6136                 if (!ibm || !ibm->name)
6137                         continue;
6138
6139                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6140                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6141                                 return -ENOSPC;
6142                         strcpy(ibms_init[i].param, val);
6143                         strcat(ibms_init[i].param, ",");
6144                         return 0;
6145                 }
6146         }
6147
6148         return -EINVAL;
6149 }
6150
6151 module_param(experimental, int, 0);
6152 MODULE_PARM_DESC(experimental,
6153                  "Enables experimental features when non-zero");
6154
6155 module_param_named(debug, dbg_level, uint, 0);
6156 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6157
6158 module_param(force_load, bool, 0);
6159 MODULE_PARM_DESC(force_load,
6160                  "Attempts to load the driver even on a "
6161                  "mis-identified ThinkPad when true");
6162
6163 module_param_named(fan_control, fan_control_allowed, bool, 0);
6164 MODULE_PARM_DESC(fan_control,
6165                  "Enables setting fan parameters features when true");
6166
6167 module_param_named(brightness_mode, brightness_mode, int, 0);
6168 MODULE_PARM_DESC(brightness_mode,
6169                  "Selects brightness control strategy: "
6170                  "0=auto, 1=EC, 2=CMOS, 3=both");
6171
6172 module_param(brightness_enable, uint, 0);
6173 MODULE_PARM_DESC(brightness_enable,
6174                  "Enables backlight control when 1, disables when 0");
6175
6176 module_param(hotkey_report_mode, uint, 0);
6177 MODULE_PARM_DESC(hotkey_report_mode,
6178                  "used for backwards compatibility with userspace, "
6179                  "see documentation");
6180
6181 #define TPACPI_PARAM(feature) \
6182         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6183         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6184                          "at module load, see documentation")
6185
6186 TPACPI_PARAM(hotkey);
6187 TPACPI_PARAM(bluetooth);
6188 TPACPI_PARAM(video);
6189 TPACPI_PARAM(light);
6190 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6191 TPACPI_PARAM(dock);
6192 #endif
6193 #ifdef CONFIG_THINKPAD_ACPI_BAY
6194 TPACPI_PARAM(bay);
6195 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6196 TPACPI_PARAM(cmos);
6197 TPACPI_PARAM(led);
6198 TPACPI_PARAM(beep);
6199 TPACPI_PARAM(ecdump);
6200 TPACPI_PARAM(brightness);
6201 TPACPI_PARAM(volume);
6202 TPACPI_PARAM(fan);
6203
6204 static void thinkpad_acpi_module_exit(void)
6205 {
6206         struct ibm_struct *ibm, *itmp;
6207
6208         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6209
6210         list_for_each_entry_safe_reverse(ibm, itmp,
6211                                          &tpacpi_all_drivers,
6212                                          all_drivers) {
6213                 ibm_exit(ibm);
6214         }
6215
6216         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6217
6218         if (tpacpi_inputdev) {
6219                 if (tp_features.input_device_registered)
6220                         input_unregister_device(tpacpi_inputdev);
6221                 else
6222                         input_free_device(tpacpi_inputdev);
6223         }
6224
6225         if (tpacpi_hwmon)
6226                 hwmon_device_unregister(tpacpi_hwmon);
6227
6228         if (tp_features.sensors_pdev_attrs_registered)
6229                 device_remove_file(&tpacpi_sensors_pdev->dev,
6230                                    &dev_attr_thinkpad_acpi_pdev_name);
6231         if (tpacpi_sensors_pdev)
6232                 platform_device_unregister(tpacpi_sensors_pdev);
6233         if (tpacpi_pdev)
6234                 platform_device_unregister(tpacpi_pdev);
6235
6236         if (tp_features.sensors_pdrv_attrs_registered)
6237                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6238         if (tp_features.platform_drv_attrs_registered)
6239                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6240
6241         if (tp_features.sensors_pdrv_registered)
6242                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6243
6244         if (tp_features.platform_drv_registered)
6245                 platform_driver_unregister(&tpacpi_pdriver);
6246
6247         if (proc_dir)
6248                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6249
6250         kfree(thinkpad_id.bios_version_str);
6251         kfree(thinkpad_id.ec_version_str);
6252         kfree(thinkpad_id.model_str);
6253 }
6254
6255
6256 static int __init thinkpad_acpi_module_init(void)
6257 {
6258         int ret, i;
6259
6260         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6261
6262         /* Parameter checking */
6263         if (hotkey_report_mode > 2)
6264                 return -EINVAL;
6265
6266         /* Driver-level probe */
6267
6268         get_thinkpad_model_data(&thinkpad_id);
6269         ret = probe_for_thinkpad();
6270         if (ret) {
6271                 thinkpad_acpi_module_exit();
6272                 return ret;
6273         }
6274
6275         /* Driver initialization */
6276
6277         TPACPI_ACPIHANDLE_INIT(ecrd);
6278         TPACPI_ACPIHANDLE_INIT(ecwr);
6279
6280         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6281         if (!proc_dir) {
6282                 printk(TPACPI_ERR
6283                        "unable to create proc dir " TPACPI_PROC_DIR);
6284                 thinkpad_acpi_module_exit();
6285                 return -ENODEV;
6286         }
6287         proc_dir->owner = THIS_MODULE;
6288
6289         ret = platform_driver_register(&tpacpi_pdriver);
6290         if (ret) {
6291                 printk(TPACPI_ERR
6292                        "unable to register main platform driver\n");
6293                 thinkpad_acpi_module_exit();
6294                 return ret;
6295         }
6296         tp_features.platform_drv_registered = 1;
6297
6298         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6299         if (ret) {
6300                 printk(TPACPI_ERR
6301                        "unable to register hwmon platform driver\n");
6302                 thinkpad_acpi_module_exit();
6303                 return ret;
6304         }
6305         tp_features.sensors_pdrv_registered = 1;
6306
6307         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6308         if (!ret) {
6309                 tp_features.platform_drv_attrs_registered = 1;
6310                 ret = tpacpi_create_driver_attributes(
6311                                         &tpacpi_hwmon_pdriver.driver);
6312         }
6313         if (ret) {
6314                 printk(TPACPI_ERR
6315                        "unable to create sysfs driver attributes\n");
6316                 thinkpad_acpi_module_exit();
6317                 return ret;
6318         }
6319         tp_features.sensors_pdrv_attrs_registered = 1;
6320
6321
6322         /* Device initialization */
6323         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6324                                                         NULL, 0);
6325         if (IS_ERR(tpacpi_pdev)) {
6326                 ret = PTR_ERR(tpacpi_pdev);
6327                 tpacpi_pdev = NULL;
6328                 printk(TPACPI_ERR "unable to register platform device\n");
6329                 thinkpad_acpi_module_exit();
6330                 return ret;
6331         }
6332         tpacpi_sensors_pdev = platform_device_register_simple(
6333                                                 TPACPI_HWMON_DRVR_NAME,
6334                                                 -1, NULL, 0);
6335         if (IS_ERR(tpacpi_sensors_pdev)) {
6336                 ret = PTR_ERR(tpacpi_sensors_pdev);
6337                 tpacpi_sensors_pdev = NULL;
6338                 printk(TPACPI_ERR
6339                        "unable to register hwmon platform device\n");
6340                 thinkpad_acpi_module_exit();
6341                 return ret;
6342         }
6343         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6344                                  &dev_attr_thinkpad_acpi_pdev_name);
6345         if (ret) {
6346                 printk(TPACPI_ERR
6347                        "unable to create sysfs hwmon device attributes\n");
6348                 thinkpad_acpi_module_exit();
6349                 return ret;
6350         }
6351         tp_features.sensors_pdev_attrs_registered = 1;
6352         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6353         if (IS_ERR(tpacpi_hwmon)) {
6354                 ret = PTR_ERR(tpacpi_hwmon);
6355                 tpacpi_hwmon = NULL;
6356                 printk(TPACPI_ERR "unable to register hwmon device\n");
6357                 thinkpad_acpi_module_exit();
6358                 return ret;
6359         }
6360         mutex_init(&tpacpi_inputdev_send_mutex);
6361         tpacpi_inputdev = input_allocate_device();
6362         if (!tpacpi_inputdev) {
6363                 printk(TPACPI_ERR "unable to allocate input device\n");
6364                 thinkpad_acpi_module_exit();
6365                 return -ENOMEM;
6366         } else {
6367                 /* Prepare input device, but don't register */
6368                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6369                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6370                 tpacpi_inputdev->id.bustype = BUS_HOST;
6371                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6372                                                 thinkpad_id.vendor :
6373                                                 PCI_VENDOR_ID_IBM;
6374                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6375                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6376         }
6377         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6378                 ret = ibm_init(&ibms_init[i]);
6379                 if (ret >= 0 && *ibms_init[i].param)
6380                         ret = ibms_init[i].data->write(ibms_init[i].param);
6381                 if (ret < 0) {
6382                         thinkpad_acpi_module_exit();
6383                         return ret;
6384                 }
6385         }
6386         ret = input_register_device(tpacpi_inputdev);
6387         if (ret < 0) {
6388                 printk(TPACPI_ERR "unable to register input device\n");
6389                 thinkpad_acpi_module_exit();
6390                 return ret;
6391         } else {
6392                 tp_features.input_device_registered = 1;
6393         }
6394
6395         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6396         return 0;
6397 }
6398
6399 /* Please remove this in year 2009 */
6400 MODULE_ALIAS("ibm_acpi");
6401
6402 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6403
6404 /*
6405  * DMI matching for module autoloading
6406  *
6407  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6408  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6409  *
6410  * Only models listed in thinkwiki will be supported, so add yours
6411  * if it is not there yet.
6412  */
6413 #define IBM_BIOS_MODULE_ALIAS(__type) \
6414         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6415
6416 /* Non-ancient thinkpads */
6417 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6418 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6419
6420 /* Ancient thinkpad BIOSes have to be identified by
6421  * BIOS type or model number, and there are far less
6422  * BIOS types than model numbers... */
6423 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6424 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6425 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6426
6427 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6428 MODULE_DESCRIPTION(TPACPI_DESC);
6429 MODULE_VERSION(TPACPI_VERSION);
6430 MODULE_LICENSE("GPL");
6431
6432 module_init(thinkpad_acpi_module_init);
6433 module_exit(thinkpad_acpi_module_exit);