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_W_BL_POWER = 0x33,
  69 };
  70
  71 struct ideapad_private {
  72         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
  73         struct platform_device *platform_device;
  74         struct input_dev *inputdev;
  75         struct backlight_device *blightdev;
  76         struct dentry *debug;
  77         unsigned long cfg;
  78 };
  79
  80 static acpi_handle ideapad_handle;
  81 static struct ideapad_private *ideapad_priv;
  82 static bool no_bt_rfkill;
  83 module_param(no_bt_rfkill, bool, 0444);
  84 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
  85
  86 /*
  87  * ACPI Helpers
  88  */
  89 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
  90
  91 static int read_method_int(acpi_handle handle, const char *method, int *val)
  92 {
  93         acpi_status status;
  94         unsigned long long result;
  95
  96         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
  97         if (ACPI_FAILURE(status)) {
  98                 *val = -1;
  99                 return -1;
 100         } else {
 101                 *val = result;
 102                 return 0;
 103         }
 104 }
 105
 106 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
 107 {
 108         acpi_status status;
 109         unsigned long long result;
 110         struct acpi_object_list params;
 111         union acpi_object in_obj;
 112
 113         params.count = 1;
 114         params.pointer = &in_obj;
 115         in_obj.type = ACPI_TYPE_INTEGER;
 116         in_obj.integer.value = cmd;
 117
 118         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
 119
 120         if (ACPI_FAILURE(status)) {
 121                 *ret = -1;
 122                 return -1;
 123         } else {
 124                 *ret = result;
 125                 return 0;
 126         }
 127 }
 128
 129 static int method_vpcw(acpi_handle handle, int cmd, int data)
 130 {
 131         struct acpi_object_list params;
 132         union acpi_object in_obj[2];
 133         acpi_status status;
 134
 135         params.count = 2;
 136         params.pointer = in_obj;
 137         in_obj[0].type = ACPI_TYPE_INTEGER;
 138         in_obj[0].integer.value = cmd;
 139         in_obj[1].type = ACPI_TYPE_INTEGER;
 140         in_obj[1].integer.value = data;
 141
 142         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 143         if (status != AE_OK)
 144                 return -1;
 145         return 0;
 146 }
 147
 148 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 149 {
 150         int val;
 151         unsigned long int end_jiffies;
 152
 153         if (method_vpcw(handle, 1, cmd))
 154                 return -1;
 155
 156         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 157              time_before(jiffies, end_jiffies);) {
 158                 schedule();
 159                 if (method_vpcr(handle, 1, &val))
 160                         return -1;
 161                 if (val == 0) {
 162                         if (method_vpcr(handle, 0, &val))
 163                                 return -1;
 164                         *data = val;
 165                         return 0;
 166                 }
 167         }
 168         pr_err("timeout in read_ec_cmd\n");
 169         return -1;
 170 }
 171
 172 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 173 {
 174         int val;
 175         unsigned long int end_jiffies;
 176
 177         if (method_vpcw(handle, 0, data))
 178                 return -1;
 179         if (method_vpcw(handle, 1, cmd))
 180                 return -1;
 181
 182         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 183              time_before(jiffies, end_jiffies);) {
 184                 schedule();
 185                 if (method_vpcr(handle, 1, &val))
 186                         return -1;
 187                 if (val == 0)
 188                         return 0;
 189         }
 190         pr_err("timeout in write_ec_cmd\n");
 191         return -1;
 192 }
 193
 194 /*
 195  * debugfs
 196  */
 197 #define DEBUGFS_EVENT_LEN (4096)
 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 event 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 mode_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, 13, { KEY_WLAN } },
 523         { KE_KEY, 16, { KEY_PROG1 } },
 524         { KE_KEY, 17, { KEY_PROG2 } },
 525         { KE_END, 0 },
 526 };
 527
 528 static int __devinit ideapad_input_init(struct ideapad_private *priv)
 529 {
 530         struct input_dev *inputdev;
 531         int error;
 532
 533         inputdev = input_allocate_device();
 534         if (!inputdev) {
 535                 pr_info("Unable to allocate input device\n");
 536                 return -ENOMEM;
 537         }
 538
 539         inputdev->name = "Ideapad extra buttons";
 540         inputdev->phys = "ideapad/input0";
 541         inputdev->id.bustype = BUS_HOST;
 542         inputdev->dev.parent = &priv->platform_device->dev;
 543
 544         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 545         if (error) {
 546                 pr_err("Unable to setup input device keymap\n");
 547                 goto err_free_dev;
 548         }
 549
 550         error = input_register_device(inputdev);
 551         if (error) {
 552                 pr_err("Unable to register input device\n");
 553                 goto err_free_keymap;
 554         }
 555
 556         priv->inputdev = inputdev;
 557         return 0;
 558
 559 err_free_keymap:
 560         sparse_keymap_free(inputdev);
 561 err_free_dev:
 562         input_free_device(inputdev);
 563         return error;
 564 }
 565
 566 static void ideapad_input_exit(struct ideapad_private *priv)
 567 {
 568         sparse_keymap_free(priv->inputdev);
 569         input_unregister_device(priv->inputdev);
 570         priv->inputdev = NULL;
 571 }
 572
 573 static void ideapad_input_report(struct ideapad_private *priv,
 574                                  unsigned long scancode)
 575 {
 576         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 577 }
 578
 579 static void ideapad_input_novokey(struct ideapad_private *priv)
 580 {
 581         unsigned long long_pressed;
 582
 583         if (read_ec_data(ideapad_handle, VPCCMD_R_NOVO, &long_pressed))
 584                 return;
 585         if (long_pressed)
 586                 ideapad_input_report(priv, 17);
 587         else
 588                 ideapad_input_report(priv, 16);
 589 }
 590
 591 /*
 592  * backlight
 593  */
 594 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 595 {
 596         unsigned long now;
 597
 598         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
 599                 return -EIO;
 600         return now;
 601 }
 602
 603 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 604 {
 605         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL,
 606                          blightdev->props.brightness))
 607                 return -EIO;
 608         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL_POWER,
 609                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 610                 return -EIO;
 611
 612         return 0;
 613 }
 614
 615 static const struct backlight_ops ideapad_backlight_ops = {
 616         .get_brightness = ideapad_backlight_get_brightness,
 617         .update_status = ideapad_backlight_update_status,
 618 };
 619
 620 static int ideapad_backlight_init(struct ideapad_private *priv)
 621 {
 622         struct backlight_device *blightdev;
 623         struct backlight_properties props;
 624         unsigned long max, now, power;
 625
 626         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &max))
 627                 return -EIO;
 628         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
 629                 return -EIO;
 630         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
 631                 return -EIO;
 632
 633         memset(&props, 0, sizeof(struct backlight_properties));
 634         props.max_brightness = max;
 635         props.type = BACKLIGHT_PLATFORM;
 636         blightdev = backlight_device_register("ideapad",
 637                                               &priv->platform_device->dev,
 638                                               priv,
 639                                               &ideapad_backlight_ops,
 640                                               &props);
 641         if (IS_ERR(blightdev)) {
 642                 pr_err("Could not register backlight device\n");
 643                 return PTR_ERR(blightdev);
 644         }
 645
 646         priv->blightdev = blightdev;
 647         blightdev->props.brightness = now;
 648         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 649         backlight_update_status(blightdev);
 650
 651         return 0;
 652 }
 653
 654 static void ideapad_backlight_exit(struct ideapad_private *priv)
 655 {
 656         if (priv->blightdev)
 657                 backlight_device_unregister(priv->blightdev);
 658         priv->blightdev = NULL;
 659 }
 660
 661 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 662 {
 663         unsigned long power;
 664         struct backlight_device *blightdev = priv->blightdev;
 665
 666         if (!blightdev)
 667                 return;
 668         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
 669                 return;
 670         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 671 }
 672
 673 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 674 {
 675         unsigned long now;
 676
 677         /* if we control brightness via acpi video driver */
 678         if (priv->blightdev == NULL) {
 679                 read_ec_data(ideapad_handle, VPCCMD_R_BL, &now);
 680                 return;
 681         }
 682
 683         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 684 }
 685
 686 /*
 687  * module init/exit
 688  */
 689 static const struct acpi_device_id ideapad_device_ids[] = {
 690         { "VPC2004", 0},
 691         { "", 0},
 692 };
 693 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 694
 695 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
 696 {
 697         int ret, i;
 698         unsigned long cfg;
 699         struct ideapad_private *priv;
 700
 701         if (read_method_int(adevice->handle, "_CFG", (int *)&cfg))
 702                 return -ENODEV;
 703
 704         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 705         if (!priv)
 706                 return -ENOMEM;
 707         dev_set_drvdata(&adevice->dev, priv);
 708         ideapad_priv = priv;
 709         ideapad_handle = adevice->handle;
 710         priv->cfg = cfg;
 711
 712         ret = ideapad_platform_init(priv);
 713         if (ret)
 714                 goto platform_failed;
 715
 716         ret = ideapad_debugfs_init(priv);
 717         if (ret)
 718                 goto debugfs_failed;
 719
 720         ret = ideapad_input_init(priv);
 721         if (ret)
 722                 goto input_failed;
 723
 724         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
 725                 if (test_bit(ideapad_rfk_data[i].cfgbit, &cfg))
 726                         ideapad_register_rfkill(adevice, i);
 727                 else
 728                         priv->rfk[i] = NULL;
 729         }
 730         ideapad_sync_rfk_state(priv);
 731
 732         if (!acpi_video_backlight_support()) {
 733                 ret = ideapad_backlight_init(priv);
 734                 if (ret && ret != -ENODEV)
 735                         goto backlight_failed;
 736         }
 737
 738         return 0;
 739
 740 backlight_failed:
 741         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 742                 ideapad_unregister_rfkill(adevice, i);
 743         ideapad_input_exit(priv);
 744 input_failed:
 745         ideapad_debugfs_exit(priv);
 746 debugfs_failed:
 747         ideapad_platform_exit(priv);
 748 platform_failed:
 749         kfree(priv);
 750         return ret;
 751 }
 752
 753 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
 754 {
 755         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 756         int i;
 757
 758         ideapad_backlight_exit(priv);
 759         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 760                 ideapad_unregister_rfkill(adevice, i);
 761         ideapad_input_exit(priv);
 762         ideapad_debugfs_exit(priv);
 763         ideapad_platform_exit(priv);
 764         dev_set_drvdata(&adevice->dev, NULL);
 765         kfree(priv);
 766
 767         return 0;
 768 }
 769
 770 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
 771 {
 772         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 773         acpi_handle handle = adevice->handle;
 774         unsigned long vpc1, vpc2, vpc_bit;
 775
 776         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 777                 return;
 778         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 779                 return;
 780
 781         vpc1 = (vpc2 << 8) | vpc1;
 782         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 783                 if (test_bit(vpc_bit, &vpc1)) {
 784                         switch (vpc_bit) {
 785                         case 9:
 786                                 ideapad_sync_rfk_state(priv);
 787                                 break;
 788                         case 4:
 789                                 ideapad_backlight_notify_brightness(priv);
 790                                 break;
 791                         case 3:
 792                                 ideapad_input_novokey(priv);
 793                                 break;
 794                         case 2:
 795                                 ideapad_backlight_notify_power(priv);
 796                                 break;
 797                         default:
 798                                 ideapad_input_report(priv, vpc_bit);
 799                         }
 800                 }
 801         }
 802 }
 803
 804 static struct acpi_driver ideapad_acpi_driver = {
 805         .name = "ideapad_acpi",
 806         .class = "IdeaPad",
 807         .ids = ideapad_device_ids,
 808         .ops.add = ideapad_acpi_add,
 809         .ops.remove = ideapad_acpi_remove,
 810         .ops.notify = ideapad_acpi_notify,
 811         .owner = THIS_MODULE,
 812 };
 813
 814 static int __init ideapad_acpi_module_init(void)
 815 {
 816         return acpi_bus_register_driver(&ideapad_acpi_driver);
 817 }
 818
 819 static void __exit ideapad_acpi_module_exit(void)
 820 {
 821         acpi_bus_unregister_driver(&ideapad_acpi_driver);
 822 }
 823
 824 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 825 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
 826 MODULE_LICENSE("GPL");
 827
 828 module_init(ideapad_acpi_module_init);
 829 module_exit(ideapad_acpi_module_exit);