drivers/platform/x86/ideapad-laptop.c

   1 /*
   2  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
   3  *
   4  *  Copyright © 2010 Intel Corporation
   5  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  *  02110-1301, USA.
  21  */
  22
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <acpi/acpi_bus.h>
  30 #include <acpi/acpi_drivers.h>
  31 #include <linux/rfkill.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/input.h>
  34 #include <linux/input/sparse-keymap.h>
  35 #include <linux/backlight.h>
  36 #include <linux/fb.h>
  37 #include <linux/debugfs.h>
  38 #include <linux/seq_file.h>
  39
  40 #define IDEAPAD_RFKILL_DEV_NUM  (3)
  41
  42 #define CFG_BT_BIT      (16)
  43 #define CFG_3G_BIT      (17)
  44 #define CFG_WIFI_BIT    (18)
  45 #define CFG_CAMERA_BIT  (19)
  46
  47 enum {
  48         VPCCMD_R_VPC1 = 0x10,
  49         VPCCMD_R_BL_MAX,
  50         VPCCMD_R_BL,
  51         VPCCMD_W_BL,
  52         VPCCMD_R_WIFI,
  53         VPCCMD_W_WIFI,
  54         VPCCMD_R_BT,
  55         VPCCMD_W_BT,
  56         VPCCMD_R_BL_POWER,
  57         VPCCMD_R_NOVO,
  58         VPCCMD_R_VPC2,
  59         VPCCMD_R_TOUCHPAD,
  60         VPCCMD_W_TOUCHPAD,
  61         VPCCMD_R_CAMERA,
  62         VPCCMD_W_CAMERA,
  63         VPCCMD_R_3G,
  64         VPCCMD_W_3G,
  65         VPCCMD_R_ODD, /* 0x21 */
  66         VPCCMD_R_RF = 0x23,
  67         VPCCMD_W_RF,
  68         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
  69         VPCCMD_W_BL_POWER = 0x33,
  70 };
  71
  72 struct ideapad_private {
  73         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
  74         struct platform_device *platform_device;
  75         struct input_dev *inputdev;
  76         struct backlight_device *blightdev;
  77         struct dentry *debug;
  78         unsigned long cfg;
  79 };
  80
  81 static acpi_handle ideapad_handle;
  82 static struct ideapad_private *ideapad_priv;
  83 static bool no_bt_rfkill;
  84 module_param(no_bt_rfkill, bool, 0444);
  85 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
  86
  87 /*
  88  * ACPI Helpers
  89  */
  90 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
  91
  92 static int read_method_int(acpi_handle handle, const char *method, int *val)
  93 {
  94         acpi_status status;
  95         unsigned long long result;
  96
  97         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
  98         if (ACPI_FAILURE(status)) {
  99                 *val = -1;
 100                 return -1;
 101         } else {
 102                 *val = result;
 103                 return 0;
 104         }
 105 }
 106
 107 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
 108 {
 109         acpi_status status;
 110         unsigned long long result;
 111         struct acpi_object_list params;
 112         union acpi_object in_obj;
 113
 114         params.count = 1;
 115         params.pointer = &in_obj;
 116         in_obj.type = ACPI_TYPE_INTEGER;
 117         in_obj.integer.value = cmd;
 118
 119         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
 120
 121         if (ACPI_FAILURE(status)) {
 122                 *ret = -1;
 123                 return -1;
 124         } else {
 125                 *ret = result;
 126                 return 0;
 127         }
 128 }
 129
 130 static int method_vpcw(acpi_handle handle, int cmd, int data)
 131 {
 132         struct acpi_object_list params;
 133         union acpi_object in_obj[2];
 134         acpi_status status;
 135
 136         params.count = 2;
 137         params.pointer = in_obj;
 138         in_obj[0].type = ACPI_TYPE_INTEGER;
 139         in_obj[0].integer.value = cmd;
 140         in_obj[1].type = ACPI_TYPE_INTEGER;
 141         in_obj[1].integer.value = data;
 142
 143         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 144         if (status != AE_OK)
 145                 return -1;
 146         return 0;
 147 }
 148
 149 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 150 {
 151         int val;
 152         unsigned long int end_jiffies;
 153
 154         if (method_vpcw(handle, 1, cmd))
 155                 return -1;
 156
 157         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 158              time_before(jiffies, end_jiffies);) {
 159                 schedule();
 160                 if (method_vpcr(handle, 1, &val))
 161                         return -1;
 162                 if (val == 0) {
 163                         if (method_vpcr(handle, 0, &val))
 164                                 return -1;
 165                         *data = val;
 166                         return 0;
 167                 }
 168         }
 169         pr_err("timeout in read_ec_cmd\n");
 170         return -1;
 171 }
 172
 173 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 174 {
 175         int val;
 176         unsigned long int end_jiffies;
 177
 178         if (method_vpcw(handle, 0, data))
 179                 return -1;
 180         if (method_vpcw(handle, 1, cmd))
 181                 return -1;
 182
 183         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 184              time_before(jiffies, end_jiffies);) {
 185                 schedule();
 186                 if (method_vpcr(handle, 1, &val))
 187                         return -1;
 188                 if (val == 0)
 189                         return 0;
 190         }
 191         pr_err("timeout in write_ec_cmd\n");
 192         return -1;
 193 }
 194
 195 /*
 196  * debugfs
 197  */
 198 static int debugfs_status_show(struct seq_file *s, void *data)
 199 {
 200         unsigned long value;
 201
 202         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &value))
 203                 seq_printf(s, "Backlight max:\t%lu\n", value);
 204         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL, &value))
 205                 seq_printf(s, "Backlight now:\t%lu\n", value);
 206         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &value))
 207                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
 208         seq_printf(s, "=====================\n");
 209
 210         if (!read_ec_data(ideapad_handle, VPCCMD_R_RF, &value))
 211                 seq_printf(s, "Radio status:\t%s(%lu)\n",
 212                            value ? "On" : "Off", value);
 213         if (!read_ec_data(ideapad_handle, VPCCMD_R_WIFI, &value))
 214                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
 215                            value ? "On" : "Off", value);
 216         if (!read_ec_data(ideapad_handle, VPCCMD_R_BT, &value))
 217                 seq_printf(s, "BT status:\t%s(%lu)\n",
 218                            value ? "On" : "Off", value);
 219         if (!read_ec_data(ideapad_handle, VPCCMD_R_3G, &value))
 220                 seq_printf(s, "3G status:\t%s(%lu)\n",
 221                            value ? "On" : "Off", value);
 222         seq_printf(s, "=====================\n");
 223
 224         if (!read_ec_data(ideapad_handle, VPCCMD_R_TOUCHPAD, &value))
 225                 seq_printf(s, "Touchpad status:%s(%lu)\n",
 226                            value ? "On" : "Off", value);
 227         if (!read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &value))
 228                 seq_printf(s, "Camera status:\t%s(%lu)\n",
 229                            value ? "On" : "Off", value);
 230
 231         return 0;
 232 }
 233
 234 static int debugfs_status_open(struct inode *inode, struct file *file)
 235 {
 236         return single_open(file, debugfs_status_show, NULL);
 237 }
 238
 239 static const struct file_operations debugfs_status_fops = {
 240         .owner = THIS_MODULE,
 241         .open = debugfs_status_open,
 242         .read = seq_read,
 243         .llseek = seq_lseek,
 244         .release = single_release,
 245 };
 246
 247 static int debugfs_cfg_show(struct seq_file *s, void *data)
 248 {
 249         if (!ideapad_priv) {
 250                 seq_printf(s, "cfg: N/A\n");
 251         } else {
 252                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
 253                            ideapad_priv->cfg);
 254                 if (test_bit(CFG_BT_BIT, &ideapad_priv->cfg))
 255                         seq_printf(s, "Bluetooth ");
 256                 if (test_bit(CFG_3G_BIT, &ideapad_priv->cfg))
 257                         seq_printf(s, "3G ");
 258                 if (test_bit(CFG_WIFI_BIT, &ideapad_priv->cfg))
 259                         seq_printf(s, "Wireless ");
 260                 if (test_bit(CFG_CAMERA_BIT, &ideapad_priv->cfg))
 261                         seq_printf(s, "Camera ");
 262                 seq_printf(s, "\nGraphic: ");
 263                 switch ((ideapad_priv->cfg)&0x700) {
 264                 case 0x100:
 265                         seq_printf(s, "Intel");
 266                         break;
 267                 case 0x200:
 268                         seq_printf(s, "ATI");
 269                         break;
 270                 case 0x300:
 271                         seq_printf(s, "Nvidia");
 272                         break;
 273                 case 0x400:
 274                         seq_printf(s, "Intel and ATI");
 275                         break;
 276                 case 0x500:
 277                         seq_printf(s, "Intel and Nvidia");
 278                         break;
 279                 }
 280                 seq_printf(s, "\n");
 281         }
 282         return 0;
 283 }
 284
 285 static int debugfs_cfg_open(struct inode *inode, struct file *file)
 286 {
 287         return single_open(file, debugfs_cfg_show, NULL);
 288 }
 289
 290 static const struct file_operations debugfs_cfg_fops = {
 291         .owner = THIS_MODULE,
 292         .open = debugfs_cfg_open,
 293         .read = seq_read,
 294         .llseek = seq_lseek,
 295         .release = single_release,
 296 };
 297
 298 static int __devinit ideapad_debugfs_init(struct ideapad_private *priv)
 299 {
 300         struct dentry *node;
 301
 302         priv->debug = debugfs_create_dir("ideapad", NULL);
 303         if (priv->debug == NULL) {
 304                 pr_err("failed to create debugfs directory");
 305                 goto errout;
 306         }
 307
 308         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, NULL,
 309                                    &debugfs_cfg_fops);
 310         if (!node) {
 311                 pr_err("failed to create cfg in debugfs");
 312                 goto errout;
 313         }
 314
 315         node = debugfs_create_file("status", S_IRUGO, priv->debug, NULL,
 316                                    &debugfs_status_fops);
 317         if (!node) {
 318                 pr_err("failed to create status in debugfs");
 319                 goto errout;
 320         }
 321
 322         return 0;
 323
 324 errout:
 325         return -ENOMEM;
 326 }
 327
 328 static void ideapad_debugfs_exit(struct ideapad_private *priv)
 329 {
 330         debugfs_remove_recursive(priv->debug);
 331         priv->debug = NULL;
 332 }
 333
 334 /*
 335  * sysfs
 336  */
 337 static ssize_t show_ideapad_cam(struct device *dev,
 338                                 struct device_attribute *attr,
 339                                 char *buf)
 340 {
 341         unsigned long result;
 342
 343         if (read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &result))
 344                 return sprintf(buf, "-1\n");
 345         return sprintf(buf, "%lu\n", result);
 346 }
 347
 348 static ssize_t store_ideapad_cam(struct device *dev,
 349                                  struct device_attribute *attr,
 350                                  const char *buf, size_t count)
 351 {
 352         int ret, state;
 353
 354         if (!count)
 355                 return 0;
 356         if (sscanf(buf, "%i", &state) != 1)
 357                 return -EINVAL;
 358         ret = write_ec_cmd(ideapad_handle, VPCCMD_W_CAMERA, state);
 359         if (ret < 0)
 360                 return ret;
 361         return count;
 362 }
 363
 364 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 365
 366 static struct attribute *ideapad_attributes[] = {
 367         &dev_attr_camera_power.attr,
 368         NULL
 369 };
 370
 371 static umode_t ideapad_is_visible(struct kobject *kobj,
 372                                  struct attribute *attr,
 373                                  int idx)
 374 {
 375         struct device *dev = container_of(kobj, struct device, kobj);
 376         struct ideapad_private *priv = dev_get_drvdata(dev);
 377         bool supported;
 378
 379         if (attr == &dev_attr_camera_power.attr)
 380                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
 381         else
 382                 supported = true;
 383
 384         return supported ? attr->mode : 0;
 385 }
 386
 387 static struct attribute_group ideapad_attribute_group = {
 388         .is_visible = ideapad_is_visible,
 389         .attrs = ideapad_attributes
 390 };
 391
 392 /*
 393  * Rfkill
 394  */
 395 struct ideapad_rfk_data {
 396         char *name;
 397         int cfgbit;
 398         int opcode;
 399         int type;
 400 };
 401
 402 const struct ideapad_rfk_data ideapad_rfk_data[] = {
 403         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
 404         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
 405         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
 406 };
 407
 408 static int ideapad_rfk_set(void *data, bool blocked)
 409 {
 410         unsigned long opcode = (unsigned long)data;
 411
 412         return write_ec_cmd(ideapad_handle, opcode, !blocked);
 413 }
 414
 415 static struct rfkill_ops ideapad_rfk_ops = {
 416         .set_block = ideapad_rfk_set,
 417 };
 418
 419 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 420 {
 421         unsigned long hw_blocked;
 422         int i;
 423
 424         if (read_ec_data(ideapad_handle, VPCCMD_R_RF, &hw_blocked))
 425                 return;
 426         hw_blocked = !hw_blocked;
 427
 428         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 429                 if (priv->rfk[i])
 430                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 431 }
 432
 433 static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
 434                                              int dev)
 435 {
 436         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 437         int ret;
 438         unsigned long sw_blocked;
 439
 440         if (no_bt_rfkill &&
 441             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 442                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 443                 write_ec_cmd(ideapad_handle,
 444                              ideapad_rfk_data[dev].opcode, 1);
 445                 return 0;
 446         }
 447
 448         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
 449                                       ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
 450                                       (void *)(long)dev);
 451         if (!priv->rfk[dev])
 452                 return -ENOMEM;
 453
 454         if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
 455                          &sw_blocked)) {
 456                 rfkill_init_sw_state(priv->rfk[dev], 0);
 457         } else {
 458                 sw_blocked = !sw_blocked;
 459                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 460         }
 461
 462         ret = rfkill_register(priv->rfk[dev]);
 463         if (ret) {
 464                 rfkill_destroy(priv->rfk[dev]);
 465                 return ret;
 466         }
 467         return 0;
 468 }
 469
 470 static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
 471 {
 472         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 473
 474         if (!priv->rfk[dev])
 475                 return;
 476
 477         rfkill_unregister(priv->rfk[dev]);
 478         rfkill_destroy(priv->rfk[dev]);
 479 }
 480
 481 /*
 482  * Platform device
 483  */
 484 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
 485 {
 486         int result;
 487
 488         priv->platform_device = platform_device_alloc("ideapad", -1);
 489         if (!priv->platform_device)
 490                 return -ENOMEM;
 491         platform_set_drvdata(priv->platform_device, priv);
 492
 493         result = platform_device_add(priv->platform_device);
 494         if (result)
 495                 goto fail_platform_device;
 496
 497         result = sysfs_create_group(&priv->platform_device->dev.kobj,
 498                                     &ideapad_attribute_group);
 499         if (result)
 500                 goto fail_sysfs;
 501         return 0;
 502
 503 fail_sysfs:
 504         platform_device_del(priv->platform_device);
 505 fail_platform_device:
 506         platform_device_put(priv->platform_device);
 507         return result;
 508 }
 509
 510 static void ideapad_platform_exit(struct ideapad_private *priv)
 511 {
 512         sysfs_remove_group(&priv->platform_device->dev.kobj,
 513                            &ideapad_attribute_group);
 514         platform_device_unregister(priv->platform_device);
 515 }
 516
 517 /*
 518  * input device
 519  */
 520 static const struct key_entry ideapad_keymap[] = {
 521         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
 522         { KE_KEY, 7,  { KEY_CAMERA } },
 523         { KE_KEY, 11, { KEY_F16 } },
 524         { KE_KEY, 13, { KEY_WLAN } },
 525         { KE_KEY, 16, { KEY_PROG1 } },
 526         { KE_KEY, 17, { KEY_PROG2 } },
 527         { KE_KEY, 64, { KEY_PROG3 } },
 528         { KE_KEY, 65, { KEY_PROG4 } },
 529         { KE_END, 0 },
 530 };
 531
 532 static int __devinit ideapad_input_init(struct ideapad_private *priv)
 533 {
 534         struct input_dev *inputdev;
 535         int error;
 536
 537         inputdev = input_allocate_device();
 538         if (!inputdev) {
 539                 pr_info("Unable to allocate input device\n");
 540                 return -ENOMEM;
 541         }
 542
 543         inputdev->name = "Ideapad extra buttons";
 544         inputdev->phys = "ideapad/input0";
 545         inputdev->id.bustype = BUS_HOST;
 546         inputdev->dev.parent = &priv->platform_device->dev;
 547
 548         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 549         if (error) {
 550                 pr_err("Unable to setup input device keymap\n");
 551                 goto err_free_dev;
 552         }
 553
 554         error = input_register_device(inputdev);
 555         if (error) {
 556                 pr_err("Unable to register input device\n");
 557                 goto err_free_keymap;
 558         }
 559
 560         priv->inputdev = inputdev;
 561         return 0;
 562
 563 err_free_keymap:
 564         sparse_keymap_free(inputdev);
 565 err_free_dev:
 566         input_free_device(inputdev);
 567         return error;
 568 }
 569
 570 static void ideapad_input_exit(struct ideapad_private *priv)
 571 {
 572         sparse_keymap_free(priv->inputdev);
 573         input_unregister_device(priv->inputdev);
 574         priv->inputdev = NULL;
 575 }
 576
 577 static void ideapad_input_report(struct ideapad_private *priv,
 578                                  unsigned long scancode)
 579 {
 580         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 581 }
 582
 583 static void ideapad_input_novokey(struct ideapad_private *priv)
 584 {
 585         unsigned long long_pressed;
 586
 587         if (read_ec_data(ideapad_handle, VPCCMD_R_NOVO, &long_pressed))
 588                 return;
 589         if (long_pressed)
 590                 ideapad_input_report(priv, 17);
 591         else
 592                 ideapad_input_report(priv, 16);
 593 }
 594
 595 static void ideapad_check_special_buttons(struct ideapad_private *priv)
 596 {
 597         unsigned long bit, value;
 598
 599         read_ec_data(ideapad_handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
 600
 601         for (bit = 0; bit < 16; bit++) {
 602                 if (test_bit(bit, &value)) {
 603                         switch (bit) {
 604                         case 6:
 605                                 /* Thermal Management button */
 606                                 ideapad_input_report(priv, 65);
 607                                 break;
 608                         case 1:
 609                                 /* OneKey Theater button */
 610                                 ideapad_input_report(priv, 64);
 611                                 break;
 612                         }
 613                 }
 614         }
 615 }
 616
 617 /*
 618  * backlight
 619  */
 620 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 621 {
 622         unsigned long now;
 623
 624         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
 625                 return -EIO;
 626         return now;
 627 }
 628
 629 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 630 {
 631         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL,
 632                          blightdev->props.brightness))
 633                 return -EIO;
 634         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL_POWER,
 635                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 636                 return -EIO;
 637
 638         return 0;
 639 }
 640
 641 static const struct backlight_ops ideapad_backlight_ops = {
 642         .get_brightness = ideapad_backlight_get_brightness,
 643         .update_status = ideapad_backlight_update_status,
 644 };
 645
 646 static int ideapad_backlight_init(struct ideapad_private *priv)
 647 {
 648         struct backlight_device *blightdev;
 649         struct backlight_properties props;
 650         unsigned long max, now, power;
 651
 652         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &max))
 653                 return -EIO;
 654         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
 655                 return -EIO;
 656         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
 657                 return -EIO;
 658
 659         memset(&props, 0, sizeof(struct backlight_properties));
 660         props.max_brightness = max;
 661         props.type = BACKLIGHT_PLATFORM;
 662         blightdev = backlight_device_register("ideapad",
 663                                               &priv->platform_device->dev,
 664                                               priv,
 665                                               &ideapad_backlight_ops,
 666                                               &props);
 667         if (IS_ERR(blightdev)) {
 668                 pr_err("Could not register backlight device\n");
 669                 return PTR_ERR(blightdev);
 670         }
 671
 672         priv->blightdev = blightdev;
 673         blightdev->props.brightness = now;
 674         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 675         backlight_update_status(blightdev);
 676
 677         return 0;
 678 }
 679
 680 static void ideapad_backlight_exit(struct ideapad_private *priv)
 681 {
 682         if (priv->blightdev)
 683                 backlight_device_unregister(priv->blightdev);
 684         priv->blightdev = NULL;
 685 }
 686
 687 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 688 {
 689         unsigned long power;
 690         struct backlight_device *blightdev = priv->blightdev;
 691
 692         if (!blightdev)
 693                 return;
 694         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
 695                 return;
 696         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 697 }
 698
 699 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 700 {
 701         unsigned long now;
 702
 703         /* if we control brightness via acpi video driver */
 704         if (priv->blightdev == NULL) {
 705                 read_ec_data(ideapad_handle, VPCCMD_R_BL, &now);
 706                 return;
 707         }
 708
 709         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 710 }
 711
 712 /*
 713  * module init/exit
 714  */
 715 static const struct acpi_device_id ideapad_device_ids[] = {
 716         { "VPC2004", 0},
 717         { "", 0},
 718 };
 719 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 720
 721 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
 722 {
 723         int ret, i;
 724         int cfg;
 725         struct ideapad_private *priv;
 726
 727         if (read_method_int(adevice->handle, "_CFG", &cfg))
 728                 return -ENODEV;
 729
 730         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 731         if (!priv)
 732                 return -ENOMEM;
 733         dev_set_drvdata(&adevice->dev, priv);
 734         ideapad_priv = priv;
 735         ideapad_handle = adevice->handle;
 736         priv->cfg = cfg;
 737
 738         ret = ideapad_platform_init(priv);
 739         if (ret)
 740                 goto platform_failed;
 741
 742         ret = ideapad_debugfs_init(priv);
 743         if (ret)
 744                 goto debugfs_failed;
 745
 746         ret = ideapad_input_init(priv);
 747         if (ret)
 748                 goto input_failed;
 749
 750         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
 751                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
 752                         ideapad_register_rfkill(adevice, i);
 753                 else
 754                         priv->rfk[i] = NULL;
 755         }
 756         ideapad_sync_rfk_state(priv);
 757
 758         if (!acpi_video_backlight_support()) {
 759                 ret = ideapad_backlight_init(priv);
 760                 if (ret && ret != -ENODEV)
 761                         goto backlight_failed;
 762         }
 763
 764         return 0;
 765
 766 backlight_failed:
 767         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 768                 ideapad_unregister_rfkill(adevice, i);
 769         ideapad_input_exit(priv);
 770 input_failed:
 771         ideapad_debugfs_exit(priv);
 772 debugfs_failed:
 773         ideapad_platform_exit(priv);
 774 platform_failed:
 775         kfree(priv);
 776         return ret;
 777 }
 778
 779 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
 780 {
 781         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 782         int i;
 783
 784         ideapad_backlight_exit(priv);
 785         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 786                 ideapad_unregister_rfkill(adevice, i);
 787         ideapad_input_exit(priv);
 788         ideapad_debugfs_exit(priv);
 789         ideapad_platform_exit(priv);
 790         dev_set_drvdata(&adevice->dev, NULL);
 791         kfree(priv);
 792
 793         return 0;
 794 }
 795
 796 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
 797 {
 798         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 799         acpi_handle handle = adevice->handle;
 800         unsigned long vpc1, vpc2, vpc_bit;
 801
 802         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 803                 return;
 804         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 805                 return;
 806
 807         vpc1 = (vpc2 << 8) | vpc1;
 808         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 809                 if (test_bit(vpc_bit, &vpc1)) {
 810                         switch (vpc_bit) {
 811                         case 9:
 812                                 ideapad_sync_rfk_state(priv);
 813                                 break;
 814                         case 13:
 815                         case 11:
 816                         case 7:
 817                         case 6:
 818                                 ideapad_input_report(priv, vpc_bit);
 819                                 break;
 820                         case 4:
 821                                 ideapad_backlight_notify_brightness(priv);
 822                                 break;
 823                         case 3:
 824                                 ideapad_input_novokey(priv);
 825                                 break;
 826                         case 2:
 827                                 ideapad_backlight_notify_power(priv);
 828                                 break;
 829                         case 0:
 830                                 ideapad_check_special_buttons(priv);
 831                                 break;
 832                         default:
 833                                 pr_info("Unknown event: %lu\n", vpc_bit);
 834                         }
 835                 }
 836         }
 837 }
 838
 839 static struct acpi_driver ideapad_acpi_driver = {
 840         .name = "ideapad_acpi",
 841         .class = "IdeaPad",
 842         .ids = ideapad_device_ids,
 843         .ops.add = ideapad_acpi_add,
 844         .ops.remove = ideapad_acpi_remove,
 845         .ops.notify = ideapad_acpi_notify,
 846         .owner = THIS_MODULE,
 847 };
 848
 849 static int __init ideapad_acpi_module_init(void)
 850 {
 851         return acpi_bus_register_driver(&ideapad_acpi_driver);
 852 }
 853
 854 static void __exit ideapad_acpi_module_exit(void)
 855 {
 856         acpi_bus_unregister_driver(&ideapad_acpi_driver);
 857 }
 858
 859 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 860 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
 861 MODULE_LICENSE("GPL");
 862
 863 module_init(ideapad_acpi_module_init);
 864 module_exit(ideapad_acpi_module_exit);