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