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 <linux/acpi.h>
  30 #include <linux/rfkill.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/input.h>
  33 #include <linux/input/sparse-keymap.h>
  34 #include <linux/backlight.h>
  35 #include <linux/fb.h>
  36 #include <linux/debugfs.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/i8042.h>
  39 #include <linux/dmi.h>
  40 #include <linux/device.h>
  41 #include <acpi/video.h>
  42
  43 #define IDEAPAD_RFKILL_DEV_NUM  (3)
  44
  45 #define BM_CONSERVATION_BIT (5)
  46
  47 #define CFG_BT_BIT      (16)
  48 #define CFG_3G_BIT      (17)
  49 #define CFG_WIFI_BIT    (18)
  50 #define CFG_CAMERA_BIT  (19)
  51
  52 #if IS_ENABLED(CONFIG_ACPI_WMI)
  53 static const char *const ideapad_wmi_fnesc_events[] = {
  54         "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
  55         "56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
  56 };
  57 #endif
  58
  59 enum {
  60         BMCMD_CONSERVATION_ON = 3,
  61         BMCMD_CONSERVATION_OFF = 5,
  62 };
  63
  64 enum {
  65         VPCCMD_R_VPC1 = 0x10,
  66         VPCCMD_R_BL_MAX,
  67         VPCCMD_R_BL,
  68         VPCCMD_W_BL,
  69         VPCCMD_R_WIFI,
  70         VPCCMD_W_WIFI,
  71         VPCCMD_R_BT,
  72         VPCCMD_W_BT,
  73         VPCCMD_R_BL_POWER,
  74         VPCCMD_R_NOVO,
  75         VPCCMD_R_VPC2,
  76         VPCCMD_R_TOUCHPAD,
  77         VPCCMD_W_TOUCHPAD,
  78         VPCCMD_R_CAMERA,
  79         VPCCMD_W_CAMERA,
  80         VPCCMD_R_3G,
  81         VPCCMD_W_3G,
  82         VPCCMD_R_ODD, /* 0x21 */
  83         VPCCMD_W_FAN,
  84         VPCCMD_R_RF,
  85         VPCCMD_W_RF,
  86         VPCCMD_R_FAN = 0x2B,
  87         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
  88         VPCCMD_W_BL_POWER = 0x33,
  89 };
  90
  91 struct ideapad_rfk_priv {
  92         int dev;
  93         struct ideapad_private *priv;
  94 };
  95
  96 struct ideapad_private {
  97         struct acpi_device *adev;
  98         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
  99         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
 100         struct platform_device *platform_device;
 101         struct input_dev *inputdev;
 102         struct backlight_device *blightdev;
 103         struct dentry *debug;
 104         unsigned long cfg;
 105         bool has_hw_rfkill_switch;
 106         const char *fnesc_guid;
 107 };
 108
 109 static bool no_bt_rfkill;
 110 module_param(no_bt_rfkill, bool, 0444);
 111 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 112
 113 /*
 114  * ACPI Helpers
 115  */
 116 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
 117
 118 static int read_method_int(acpi_handle handle, const char *method, int *val)
 119 {
 120         acpi_status status;
 121         unsigned long long result;
 122
 123         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 124         if (ACPI_FAILURE(status)) {
 125                 *val = -1;
 126                 return -1;
 127         } else {
 128                 *val = result;
 129                 return 0;
 130         }
 131 }
 132
 133 static int method_gbmd(acpi_handle handle, unsigned long *ret)
 134 {
 135         int result, val;
 136
 137         result = read_method_int(handle, "GBMD", &val);
 138         *ret = val;
 139         return result;
 140 }
 141
 142 static int method_sbmc(acpi_handle handle, int cmd)
 143 {
 144         acpi_status status;
 145
 146         status = acpi_execute_simple_method(handle, "SBMC", cmd);
 147         return ACPI_FAILURE(status) ? -1 : 0;
 148 }
 149
 150 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
 151 {
 152         acpi_status status;
 153         unsigned long long result;
 154         struct acpi_object_list params;
 155         union acpi_object in_obj;
 156
 157         params.count = 1;
 158         params.pointer = &in_obj;
 159         in_obj.type = ACPI_TYPE_INTEGER;
 160         in_obj.integer.value = cmd;
 161
 162         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
 163
 164         if (ACPI_FAILURE(status)) {
 165                 *ret = -1;
 166                 return -1;
 167         } else {
 168                 *ret = result;
 169                 return 0;
 170         }
 171 }
 172
 173 static int method_vpcw(acpi_handle handle, int cmd, int data)
 174 {
 175         struct acpi_object_list params;
 176         union acpi_object in_obj[2];
 177         acpi_status status;
 178
 179         params.count = 2;
 180         params.pointer = in_obj;
 181         in_obj[0].type = ACPI_TYPE_INTEGER;
 182         in_obj[0].integer.value = cmd;
 183         in_obj[1].type = ACPI_TYPE_INTEGER;
 184         in_obj[1].integer.value = data;
 185
 186         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 187         if (status != AE_OK)
 188                 return -1;
 189         return 0;
 190 }
 191
 192 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 193 {
 194         int val;
 195         unsigned long int end_jiffies;
 196
 197         if (method_vpcw(handle, 1, cmd))
 198                 return -1;
 199
 200         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 201              time_before(jiffies, end_jiffies);) {
 202                 schedule();
 203                 if (method_vpcr(handle, 1, &val))
 204                         return -1;
 205                 if (val == 0) {
 206                         if (method_vpcr(handle, 0, &val))
 207                                 return -1;
 208                         *data = val;
 209                         return 0;
 210                 }
 211         }
 212         pr_err("timeout in read_ec_cmd\n");
 213         return -1;
 214 }
 215
 216 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 217 {
 218         int val;
 219         unsigned long int end_jiffies;
 220
 221         if (method_vpcw(handle, 0, data))
 222                 return -1;
 223         if (method_vpcw(handle, 1, cmd))
 224                 return -1;
 225
 226         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 227              time_before(jiffies, end_jiffies);) {
 228                 schedule();
 229                 if (method_vpcr(handle, 1, &val))
 230                         return -1;
 231                 if (val == 0)
 232                         return 0;
 233         }
 234         pr_err("timeout in write_ec_cmd\n");
 235         return -1;
 236 }
 237
 238 /*
 239  * debugfs
 240  */
 241 static int debugfs_status_show(struct seq_file *s, void *data)
 242 {
 243         struct ideapad_private *priv = s->private;
 244         unsigned long value;
 245
 246         if (!priv)
 247                 return -EINVAL;
 248
 249         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
 250                 seq_printf(s, "Backlight max:\t%lu\n", value);
 251         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
 252                 seq_printf(s, "Backlight now:\t%lu\n", value);
 253         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
 254                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
 255         seq_printf(s, "=====================\n");
 256
 257         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
 258                 seq_printf(s, "Radio status:\t%s(%lu)\n",
 259                            value ? "On" : "Off", value);
 260         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
 261                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
 262                            value ? "On" : "Off", value);
 263         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
 264                 seq_printf(s, "BT status:\t%s(%lu)\n",
 265                            value ? "On" : "Off", value);
 266         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
 267                 seq_printf(s, "3G status:\t%s(%lu)\n",
 268                            value ? "On" : "Off", value);
 269         seq_printf(s, "=====================\n");
 270
 271         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
 272                 seq_printf(s, "Touchpad status:%s(%lu)\n",
 273                            value ? "On" : "Off", value);
 274         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
 275                 seq_printf(s, "Camera status:\t%s(%lu)\n",
 276                            value ? "On" : "Off", value);
 277         seq_puts(s, "=====================\n");
 278
 279         if (!method_gbmd(priv->adev->handle, &value)) {
 280                 seq_printf(s, "Conservation mode:\t%s(%lu)\n",
 281                            test_bit(BM_CONSERVATION_BIT, &value) ? "On" : "Off",
 282                            value);
 283         }
 284
 285         return 0;
 286 }
 287
 288 static int debugfs_status_open(struct inode *inode, struct file *file)
 289 {
 290         return single_open(file, debugfs_status_show, inode->i_private);
 291 }
 292
 293 static const struct file_operations debugfs_status_fops = {
 294         .owner = THIS_MODULE,
 295         .open = debugfs_status_open,
 296         .read = seq_read,
 297         .llseek = seq_lseek,
 298         .release = single_release,
 299 };
 300
 301 static int debugfs_cfg_show(struct seq_file *s, void *data)
 302 {
 303         struct ideapad_private *priv = s->private;
 304
 305         if (!priv) {
 306                 seq_printf(s, "cfg: N/A\n");
 307         } else {
 308                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
 309                            priv->cfg);
 310                 if (test_bit(CFG_BT_BIT, &priv->cfg))
 311                         seq_printf(s, "Bluetooth ");
 312                 if (test_bit(CFG_3G_BIT, &priv->cfg))
 313                         seq_printf(s, "3G ");
 314                 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
 315                         seq_printf(s, "Wireless ");
 316                 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
 317                         seq_printf(s, "Camera ");
 318                 seq_printf(s, "\nGraphic: ");
 319                 switch ((priv->cfg)&0x700) {
 320                 case 0x100:
 321                         seq_printf(s, "Intel");
 322                         break;
 323                 case 0x200:
 324                         seq_printf(s, "ATI");
 325                         break;
 326                 case 0x300:
 327                         seq_printf(s, "Nvidia");
 328                         break;
 329                 case 0x400:
 330                         seq_printf(s, "Intel and ATI");
 331                         break;
 332                 case 0x500:
 333                         seq_printf(s, "Intel and Nvidia");
 334                         break;
 335                 }
 336                 seq_printf(s, "\n");
 337         }
 338         return 0;
 339 }
 340
 341 static int debugfs_cfg_open(struct inode *inode, struct file *file)
 342 {
 343         return single_open(file, debugfs_cfg_show, inode->i_private);
 344 }
 345
 346 static const struct file_operations debugfs_cfg_fops = {
 347         .owner = THIS_MODULE,
 348         .open = debugfs_cfg_open,
 349         .read = seq_read,
 350         .llseek = seq_lseek,
 351         .release = single_release,
 352 };
 353
 354 static int ideapad_debugfs_init(struct ideapad_private *priv)
 355 {
 356         struct dentry *node;
 357
 358         priv->debug = debugfs_create_dir("ideapad", NULL);
 359         if (priv->debug == NULL) {
 360                 pr_err("failed to create debugfs directory");
 361                 goto errout;
 362         }
 363
 364         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
 365                                    &debugfs_cfg_fops);
 366         if (!node) {
 367                 pr_err("failed to create cfg in debugfs");
 368                 goto errout;
 369         }
 370
 371         node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
 372                                    &debugfs_status_fops);
 373         if (!node) {
 374                 pr_err("failed to create status in debugfs");
 375                 goto errout;
 376         }
 377
 378         return 0;
 379
 380 errout:
 381         return -ENOMEM;
 382 }
 383
 384 static void ideapad_debugfs_exit(struct ideapad_private *priv)
 385 {
 386         debugfs_remove_recursive(priv->debug);
 387         priv->debug = NULL;
 388 }
 389
 390 /*
 391  * sysfs
 392  */
 393 static ssize_t show_ideapad_cam(struct device *dev,
 394                                 struct device_attribute *attr,
 395                                 char *buf)
 396 {
 397         unsigned long result;
 398         struct ideapad_private *priv = dev_get_drvdata(dev);
 399
 400         if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
 401                 return sprintf(buf, "-1\n");
 402         return sprintf(buf, "%lu\n", result);
 403 }
 404
 405 static ssize_t store_ideapad_cam(struct device *dev,
 406                                  struct device_attribute *attr,
 407                                  const char *buf, size_t count)
 408 {
 409         int ret, state;
 410         struct ideapad_private *priv = dev_get_drvdata(dev);
 411
 412         if (!count)
 413                 return 0;
 414         if (sscanf(buf, "%i", &state) != 1)
 415                 return -EINVAL;
 416         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
 417         if (ret < 0)
 418                 return -EIO;
 419         return count;
 420 }
 421
 422 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 423
 424 static ssize_t show_ideapad_fan(struct device *dev,
 425                                 struct device_attribute *attr,
 426                                 char *buf)
 427 {
 428         unsigned long result;
 429         struct ideapad_private *priv = dev_get_drvdata(dev);
 430
 431         if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
 432                 return sprintf(buf, "-1\n");
 433         return sprintf(buf, "%lu\n", result);
 434 }
 435
 436 static ssize_t store_ideapad_fan(struct device *dev,
 437                                  struct device_attribute *attr,
 438                                  const char *buf, size_t count)
 439 {
 440         int ret, state;
 441         struct ideapad_private *priv = dev_get_drvdata(dev);
 442
 443         if (!count)
 444                 return 0;
 445         if (sscanf(buf, "%i", &state) != 1)
 446                 return -EINVAL;
 447         if (state < 0 || state > 4 || state == 3)
 448                 return -EINVAL;
 449         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
 450         if (ret < 0)
 451                 return -EIO;
 452         return count;
 453 }
 454
 455 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
 456
 457 static ssize_t touchpad_show(struct device *dev,
 458                              struct device_attribute *attr,
 459                              char *buf)
 460 {
 461         struct ideapad_private *priv = dev_get_drvdata(dev);
 462         unsigned long result;
 463
 464         if (read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result))
 465                 return sprintf(buf, "-1\n");
 466         return sprintf(buf, "%lu\n", result);
 467 }
 468
 469 /* Switch to RO for now: It might be revisited in the future */
 470 static ssize_t __maybe_unused touchpad_store(struct device *dev,
 471                                              struct device_attribute *attr,
 472                                              const char *buf, size_t count)
 473 {
 474         struct ideapad_private *priv = dev_get_drvdata(dev);
 475         bool state;
 476         int ret;
 477
 478         ret = kstrtobool(buf, &state);
 479         if (ret)
 480                 return ret;
 481
 482         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
 483         if (ret < 0)
 484                 return -EIO;
 485         return count;
 486 }
 487
 488 static DEVICE_ATTR_RO(touchpad);
 489
 490 static ssize_t conservation_mode_show(struct device *dev,
 491                                 struct device_attribute *attr,
 492                                 char *buf)
 493 {
 494         struct ideapad_private *priv = dev_get_drvdata(dev);
 495         unsigned long result;
 496
 497         if (method_gbmd(priv->adev->handle, &result))
 498                 return sprintf(buf, "-1\n");
 499         return sprintf(buf, "%u\n", test_bit(BM_CONSERVATION_BIT, &result));
 500 }
 501
 502 static ssize_t conservation_mode_store(struct device *dev,
 503                                  struct device_attribute *attr,
 504                                  const char *buf, size_t count)
 505 {
 506         struct ideapad_private *priv = dev_get_drvdata(dev);
 507         bool state;
 508         int ret;
 509
 510         ret = kstrtobool(buf, &state);
 511         if (ret)
 512                 return ret;
 513
 514         ret = method_sbmc(priv->adev->handle, state ?
 515                                               BMCMD_CONSERVATION_ON :
 516                                               BMCMD_CONSERVATION_OFF);
 517         if (ret < 0)
 518                 return -EIO;
 519         return count;
 520 }
 521
 522 static DEVICE_ATTR_RW(conservation_mode);
 523
 524 static struct attribute *ideapad_attributes[] = {
 525         &dev_attr_camera_power.attr,
 526         &dev_attr_fan_mode.attr,
 527         &dev_attr_touchpad.attr,
 528         &dev_attr_conservation_mode.attr,
 529         NULL
 530 };
 531
 532 static umode_t ideapad_is_visible(struct kobject *kobj,
 533                                  struct attribute *attr,
 534                                  int idx)
 535 {
 536         struct device *dev = container_of(kobj, struct device, kobj);
 537         struct ideapad_private *priv = dev_get_drvdata(dev);
 538         bool supported;
 539
 540         if (attr == &dev_attr_camera_power.attr)
 541                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
 542         else if (attr == &dev_attr_fan_mode.attr) {
 543                 unsigned long value;
 544                 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
 545                                           &value);
 546         } else if (attr == &dev_attr_conservation_mode.attr) {
 547                 supported = acpi_has_method(priv->adev->handle, "GBMD") &&
 548                             acpi_has_method(priv->adev->handle, "SBMC");
 549         } else
 550                 supported = true;
 551
 552         return supported ? attr->mode : 0;
 553 }
 554
 555 static const struct attribute_group ideapad_attribute_group = {
 556         .is_visible = ideapad_is_visible,
 557         .attrs = ideapad_attributes
 558 };
 559
 560 /*
 561  * Rfkill
 562  */
 563 struct ideapad_rfk_data {
 564         char *name;
 565         int cfgbit;
 566         int opcode;
 567         int type;
 568 };
 569
 570 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
 571         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
 572         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
 573         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
 574 };
 575
 576 static int ideapad_rfk_set(void *data, bool blocked)
 577 {
 578         struct ideapad_rfk_priv *priv = data;
 579         int opcode = ideapad_rfk_data[priv->dev].opcode;
 580
 581         return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
 582 }
 583
 584 static const struct rfkill_ops ideapad_rfk_ops = {
 585         .set_block = ideapad_rfk_set,
 586 };
 587
 588 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 589 {
 590         unsigned long hw_blocked = 0;
 591         int i;
 592
 593         if (priv->has_hw_rfkill_switch) {
 594                 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
 595                         return;
 596                 hw_blocked = !hw_blocked;
 597         }
 598
 599         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 600                 if (priv->rfk[i])
 601                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 602 }
 603
 604 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
 605 {
 606         int ret;
 607         unsigned long sw_blocked;
 608
 609         if (no_bt_rfkill &&
 610             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 611                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 612                 write_ec_cmd(priv->adev->handle,
 613                              ideapad_rfk_data[dev].opcode, 1);
 614                 return 0;
 615         }
 616         priv->rfk_priv[dev].dev = dev;
 617         priv->rfk_priv[dev].priv = priv;
 618
 619         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
 620                                       &priv->platform_device->dev,
 621                                       ideapad_rfk_data[dev].type,
 622                                       &ideapad_rfk_ops,
 623                                       &priv->rfk_priv[dev]);
 624         if (!priv->rfk[dev])
 625                 return -ENOMEM;
 626
 627         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
 628                          &sw_blocked)) {
 629                 rfkill_init_sw_state(priv->rfk[dev], 0);
 630         } else {
 631                 sw_blocked = !sw_blocked;
 632                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 633         }
 634
 635         ret = rfkill_register(priv->rfk[dev]);
 636         if (ret) {
 637                 rfkill_destroy(priv->rfk[dev]);
 638                 return ret;
 639         }
 640         return 0;
 641 }
 642
 643 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
 644 {
 645         if (!priv->rfk[dev])
 646                 return;
 647
 648         rfkill_unregister(priv->rfk[dev]);
 649         rfkill_destroy(priv->rfk[dev]);
 650 }
 651
 652 /*
 653  * Platform device
 654  */
 655 static int ideapad_sysfs_init(struct ideapad_private *priv)
 656 {
 657         return sysfs_create_group(&priv->platform_device->dev.kobj,
 658                                     &ideapad_attribute_group);
 659 }
 660
 661 static void ideapad_sysfs_exit(struct ideapad_private *priv)
 662 {
 663         sysfs_remove_group(&priv->platform_device->dev.kobj,
 664                            &ideapad_attribute_group);
 665 }
 666
 667 /*
 668  * input device
 669  */
 670 static const struct key_entry ideapad_keymap[] = {
 671         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
 672         { KE_KEY, 7,  { KEY_CAMERA } },
 673         { KE_KEY, 8,  { KEY_MICMUTE } },
 674         { KE_KEY, 11, { KEY_F16 } },
 675         { KE_KEY, 13, { KEY_WLAN } },
 676         { KE_KEY, 16, { KEY_PROG1 } },
 677         { KE_KEY, 17, { KEY_PROG2 } },
 678         { KE_KEY, 64, { KEY_PROG3 } },
 679         { KE_KEY, 65, { KEY_PROG4 } },
 680         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
 681         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
 682         { KE_KEY, 128, { KEY_ESC } },
 683
 684         { KE_END, 0 },
 685 };
 686
 687 static int ideapad_input_init(struct ideapad_private *priv)
 688 {
 689         struct input_dev *inputdev;
 690         int error;
 691
 692         inputdev = input_allocate_device();
 693         if (!inputdev)
 694                 return -ENOMEM;
 695
 696         inputdev->name = "Ideapad extra buttons";
 697         inputdev->phys = "ideapad/input0";
 698         inputdev->id.bustype = BUS_HOST;
 699         inputdev->dev.parent = &priv->platform_device->dev;
 700
 701         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 702         if (error) {
 703                 pr_err("Unable to setup input device keymap\n");
 704                 goto err_free_dev;
 705         }
 706
 707         error = input_register_device(inputdev);
 708         if (error) {
 709                 pr_err("Unable to register input device\n");
 710                 goto err_free_dev;
 711         }
 712
 713         priv->inputdev = inputdev;
 714         return 0;
 715
 716 err_free_dev:
 717         input_free_device(inputdev);
 718         return error;
 719 }
 720
 721 static void ideapad_input_exit(struct ideapad_private *priv)
 722 {
 723         input_unregister_device(priv->inputdev);
 724         priv->inputdev = NULL;
 725 }
 726
 727 static void ideapad_input_report(struct ideapad_private *priv,
 728                                  unsigned long scancode)
 729 {
 730         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 731 }
 732
 733 static void ideapad_input_novokey(struct ideapad_private *priv)
 734 {
 735         unsigned long long_pressed;
 736
 737         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
 738                 return;
 739         if (long_pressed)
 740                 ideapad_input_report(priv, 17);
 741         else
 742                 ideapad_input_report(priv, 16);
 743 }
 744
 745 static void ideapad_check_special_buttons(struct ideapad_private *priv)
 746 {
 747         unsigned long bit, value;
 748
 749         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
 750
 751         for (bit = 0; bit < 16; bit++) {
 752                 if (test_bit(bit, &value)) {
 753                         switch (bit) {
 754                         case 0: /* Z580 */
 755                         case 6: /* Z570 */
 756                                 /* Thermal Management button */
 757                                 ideapad_input_report(priv, 65);
 758                                 break;
 759                         case 1:
 760                                 /* OneKey Theater button */
 761                                 ideapad_input_report(priv, 64);
 762                                 break;
 763                         default:
 764                                 pr_info("Unknown special button: %lu\n", bit);
 765                                 break;
 766                         }
 767                 }
 768         }
 769 }
 770
 771 /*
 772  * backlight
 773  */
 774 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 775 {
 776         struct ideapad_private *priv = bl_get_data(blightdev);
 777         unsigned long now;
 778
 779         if (!priv)
 780                 return -EINVAL;
 781
 782         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 783                 return -EIO;
 784         return now;
 785 }
 786
 787 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 788 {
 789         struct ideapad_private *priv = bl_get_data(blightdev);
 790
 791         if (!priv)
 792                 return -EINVAL;
 793
 794         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
 795                          blightdev->props.brightness))
 796                 return -EIO;
 797         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
 798                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 799                 return -EIO;
 800
 801         return 0;
 802 }
 803
 804 static const struct backlight_ops ideapad_backlight_ops = {
 805         .get_brightness = ideapad_backlight_get_brightness,
 806         .update_status = ideapad_backlight_update_status,
 807 };
 808
 809 static int ideapad_backlight_init(struct ideapad_private *priv)
 810 {
 811         struct backlight_device *blightdev;
 812         struct backlight_properties props;
 813         unsigned long max, now, power;
 814
 815         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
 816                 return -EIO;
 817         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 818                 return -EIO;
 819         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 820                 return -EIO;
 821
 822         memset(&props, 0, sizeof(struct backlight_properties));
 823         props.max_brightness = max;
 824         props.type = BACKLIGHT_PLATFORM;
 825         blightdev = backlight_device_register("ideapad",
 826                                               &priv->platform_device->dev,
 827                                               priv,
 828                                               &ideapad_backlight_ops,
 829                                               &props);
 830         if (IS_ERR(blightdev)) {
 831                 pr_err("Could not register backlight device\n");
 832                 return PTR_ERR(blightdev);
 833         }
 834
 835         priv->blightdev = blightdev;
 836         blightdev->props.brightness = now;
 837         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 838         backlight_update_status(blightdev);
 839
 840         return 0;
 841 }
 842
 843 static void ideapad_backlight_exit(struct ideapad_private *priv)
 844 {
 845         backlight_device_unregister(priv->blightdev);
 846         priv->blightdev = NULL;
 847 }
 848
 849 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 850 {
 851         unsigned long power;
 852         struct backlight_device *blightdev = priv->blightdev;
 853
 854         if (!blightdev)
 855                 return;
 856         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 857                 return;
 858         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 859 }
 860
 861 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 862 {
 863         unsigned long now;
 864
 865         /* if we control brightness via acpi video driver */
 866         if (priv->blightdev == NULL) {
 867                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
 868                 return;
 869         }
 870
 871         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 872 }
 873
 874 /*
 875  * module init/exit
 876  */
 877 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 878 {
 879         unsigned long value;
 880
 881         /* Without reading from EC touchpad LED doesn't switch state */
 882         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
 883                 /* Some IdeaPads don't really turn off touchpad - they only
 884                  * switch the LED state. We (de)activate KBC AUX port to turn
 885                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
 886                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
 887                 unsigned char param;
 888                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
 889                               I8042_CMD_AUX_DISABLE);
 890                 ideapad_input_report(priv, value ? 67 : 66);
 891         }
 892 }
 893
 894 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 895 {
 896         struct ideapad_private *priv = data;
 897         unsigned long vpc1, vpc2, vpc_bit;
 898
 899         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 900                 return;
 901         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 902                 return;
 903
 904         vpc1 = (vpc2 << 8) | vpc1;
 905         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 906                 if (test_bit(vpc_bit, &vpc1)) {
 907                         switch (vpc_bit) {
 908                         case 9:
 909                                 ideapad_sync_rfk_state(priv);
 910                                 break;
 911                         case 13:
 912                         case 11:
 913                         case 8:
 914                         case 7:
 915                         case 6:
 916                                 ideapad_input_report(priv, vpc_bit);
 917                                 break;
 918                         case 5:
 919                                 ideapad_sync_touchpad_state(priv);
 920                                 break;
 921                         case 4:
 922                                 ideapad_backlight_notify_brightness(priv);
 923                                 break;
 924                         case 3:
 925                                 ideapad_input_novokey(priv);
 926                                 break;
 927                         case 2:
 928                                 ideapad_backlight_notify_power(priv);
 929                                 break;
 930                         case 0:
 931                                 ideapad_check_special_buttons(priv);
 932                                 break;
 933                         case 1:
 934                                 /* Some IdeaPads report event 1 every ~20
 935                                  * seconds while on battery power; some
 936                                  * report this when changing to/from tablet
 937                                  * mode. Squelch this event.
 938                                  */
 939                                 break;
 940                         default:
 941                                 pr_info("Unknown event: %lu\n", vpc_bit);
 942                         }
 943                 }
 944         }
 945 }
 946
 947 #if IS_ENABLED(CONFIG_ACPI_WMI)
 948 static void ideapad_wmi_notify(u32 value, void *context)
 949 {
 950         switch (value) {
 951         case 128:
 952                 ideapad_input_report(context, value);
 953                 break;
 954         default:
 955                 pr_info("Unknown WMI event %u\n", value);
 956         }
 957 }
 958 #endif
 959
 960 /*
 961  * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
 962  * always results in 0 on these models, causing ideapad_laptop to wrongly
 963  * report all radios as hardware-blocked.
 964  */
 965 static const struct dmi_system_id no_hw_rfkill_list[] = {
 966         {
 967                 .ident = "Lenovo G40-30",
 968                 .matches = {
 969                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 970                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
 971                 },
 972         },
 973         {
 974                 .ident = "Lenovo G50-30",
 975                 .matches = {
 976                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 977                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
 978                 },
 979         },
 980         {
 981                 .ident = "Lenovo V310-14IKB",
 982                 .matches = {
 983                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 984                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-14IKB"),
 985                 },
 986         },
 987         {
 988                 .ident = "Lenovo V310-14ISK",
 989                 .matches = {
 990                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 991                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-14ISK"),
 992                 },
 993         },
 994         {
 995                 .ident = "Lenovo V310-15IKB",
 996                 .matches = {
 997                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 998                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-15IKB"),
 999                 },
1000         },
1001         {
1002                 .ident = "Lenovo V310-15ISK",
1003                 .matches = {
1004                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1005                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-15ISK"),
1006                 },
1007         },
1008         {
1009                 .ident = "Lenovo V510-15IKB",
1010                 .matches = {
1011                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1012                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V510-15IKB"),
1013                 },
1014         },
1015         {
1016                 .ident = "Lenovo ideapad 300-15IBR",
1017                 .matches = {
1018                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1019                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300-15IBR"),
1020                 },
1021         },
1022         {
1023                 .ident = "Lenovo ideapad 300-15IKB",
1024                 .matches = {
1025                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1026                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300-15IKB"),
1027                 },
1028         },
1029         {
1030                 .ident = "Lenovo ideapad 300S-11IBR",
1031                 .matches = {
1032                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1033                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300S-11BR"),
1034                 },
1035         },
1036         {
1037                 .ident = "Lenovo ideapad 310-15ABR",
1038                 .matches = {
1039                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1040                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15ABR"),
1041                 },
1042         },
1043         {
1044                 .ident = "Lenovo ideapad 310-15IAP",
1045                 .matches = {
1046                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1047                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15IAP"),
1048                 },
1049         },
1050         {
1051                 .ident = "Lenovo ideapad 310-15IKB",
1052                 .matches = {
1053                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1054                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15IKB"),
1055                 },
1056         },
1057         {
1058                 .ident = "Lenovo ideapad 310-15ISK",
1059                 .matches = {
1060                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1061                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15ISK"),
1062                 },
1063         },
1064         {
1065                 .ident = "Lenovo ideapad Y700-14ISK",
1066                 .matches = {
1067                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1068                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-14ISK"),
1069                 },
1070         },
1071         {
1072                 .ident = "Lenovo ideapad Y700-15ACZ",
1073                 .matches = {
1074                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1075                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ACZ"),
1076                 },
1077         },
1078         {
1079                 .ident = "Lenovo ideapad Y700-15ISK",
1080                 .matches = {
1081                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1082                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"),
1083                 },
1084         },
1085         {
1086                 .ident = "Lenovo ideapad Y700 Touch-15ISK",
1087                 .matches = {
1088                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1089                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"),
1090                 },
1091         },
1092         {
1093                 .ident = "Lenovo ideapad Y700-17ISK",
1094                 .matches = {
1095                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1096                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"),
1097                 },
1098         },
1099         {
1100                 .ident = "Lenovo Legion Y520-15IKB",
1101                 .matches = {
1102                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1103                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKB"),
1104                 },
1105         },
1106         {
1107                 .ident = "Lenovo Legion Y720-15IKBN",
1108                 .matches = {
1109                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1110                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKBN"),
1111                 },
1112         },
1113         {
1114                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
1115                 .matches = {
1116                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1117                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
1118                 },
1119         },
1120         {
1121                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
1122                 .matches = {
1123                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1124                         DMI_MATCH(DMI_BOARD_NAME, "Yoga2"),
1125                 },
1126         },
1127         {
1128                 .ident = "Lenovo Yoga 3 1170 / 1470",
1129                 .matches = {
1130                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1131                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3"),
1132                 },
1133         },
1134         {
1135                 .ident = "Lenovo Yoga 3 Pro 1370",
1136                 .matches = {
1137                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1138                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
1139                 },
1140         },
1141         {
1142                 .ident = "Lenovo Yoga 700",
1143                 .matches = {
1144                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1145                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"),
1146                 },
1147         },
1148         {
1149                 .ident = "Lenovo Yoga 900",
1150                 .matches = {
1151                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1152                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"),
1153                 },
1154         },
1155         {
1156                 .ident = "Lenovo Yoga 900",
1157                 .matches = {
1158                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1159                         DMI_MATCH(DMI_BOARD_NAME, "VIUU4"),
1160                 },
1161         },
1162         {
1163                 .ident = "Lenovo YOGA 910-13IKB",
1164                 .matches = {
1165                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1166                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 910-13IKB"),
1167                 },
1168         },
1169         {}
1170 };
1171
1172 static int ideapad_acpi_add(struct platform_device *pdev)
1173 {
1174         int ret, i;
1175         int cfg;
1176         struct ideapad_private *priv;
1177         struct acpi_device *adev;
1178
1179         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
1180         if (ret)
1181                 return -ENODEV;
1182
1183         if (read_method_int(adev->handle, "_CFG", &cfg))
1184                 return -ENODEV;
1185
1186         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1187         if (!priv)
1188                 return -ENOMEM;
1189
1190         dev_set_drvdata(&pdev->dev, priv);
1191         priv->cfg = cfg;
1192         priv->adev = adev;
1193         priv->platform_device = pdev;
1194         priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
1195
1196         ret = ideapad_sysfs_init(priv);
1197         if (ret)
1198                 return ret;
1199
1200         ret = ideapad_debugfs_init(priv);
1201         if (ret)
1202                 goto debugfs_failed;
1203
1204         ret = ideapad_input_init(priv);
1205         if (ret)
1206                 goto input_failed;
1207
1208         /*
1209          * On some models without a hw-switch (the yoga 2 13 at least)
1210          * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
1211          */
1212         if (!priv->has_hw_rfkill_switch)
1213                 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
1214
1215         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1216                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
1217                         ideapad_register_rfkill(priv, i);
1218
1219         ideapad_sync_rfk_state(priv);
1220         ideapad_sync_touchpad_state(priv);
1221
1222         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1223                 ret = ideapad_backlight_init(priv);
1224                 if (ret && ret != -ENODEV)
1225                         goto backlight_failed;
1226         }
1227         ret = acpi_install_notify_handler(adev->handle,
1228                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
1229         if (ret)
1230                 goto notification_failed;
1231
1232 #if IS_ENABLED(CONFIG_ACPI_WMI)
1233         for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
1234                 ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
1235                                                  ideapad_wmi_notify, priv);
1236                 if (ret == AE_OK) {
1237                         priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
1238                         break;
1239                 }
1240         }
1241         if (ret != AE_OK && ret != AE_NOT_EXIST)
1242                 goto notification_failed_wmi;
1243 #endif
1244
1245         return 0;
1246 #if IS_ENABLED(CONFIG_ACPI_WMI)
1247 notification_failed_wmi:
1248         acpi_remove_notify_handler(priv->adev->handle,
1249                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1250 #endif
1251 notification_failed:
1252         ideapad_backlight_exit(priv);
1253 backlight_failed:
1254         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1255                 ideapad_unregister_rfkill(priv, i);
1256         ideapad_input_exit(priv);
1257 input_failed:
1258         ideapad_debugfs_exit(priv);
1259 debugfs_failed:
1260         ideapad_sysfs_exit(priv);
1261         return ret;
1262 }
1263
1264 static int ideapad_acpi_remove(struct platform_device *pdev)
1265 {
1266         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
1267         int i;
1268
1269 #if IS_ENABLED(CONFIG_ACPI_WMI)
1270         if (priv->fnesc_guid)
1271                 wmi_remove_notify_handler(priv->fnesc_guid);
1272 #endif
1273         acpi_remove_notify_handler(priv->adev->handle,
1274                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1275         ideapad_backlight_exit(priv);
1276         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1277                 ideapad_unregister_rfkill(priv, i);
1278         ideapad_input_exit(priv);
1279         ideapad_debugfs_exit(priv);
1280         ideapad_sysfs_exit(priv);
1281         dev_set_drvdata(&pdev->dev, NULL);
1282
1283         return 0;
1284 }
1285
1286 #ifdef CONFIG_PM_SLEEP
1287 static int ideapad_acpi_resume(struct device *device)
1288 {
1289         struct ideapad_private *priv;
1290
1291         if (!device)
1292                 return -EINVAL;
1293         priv = dev_get_drvdata(device);
1294
1295         ideapad_sync_rfk_state(priv);
1296         ideapad_sync_touchpad_state(priv);
1297         return 0;
1298 }
1299 #endif
1300 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
1301
1302 static const struct acpi_device_id ideapad_device_ids[] = {
1303         { "VPC2004", 0},
1304         { "", 0},
1305 };
1306 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
1307
1308 static struct platform_driver ideapad_acpi_driver = {
1309         .probe = ideapad_acpi_add,
1310         .remove = ideapad_acpi_remove,
1311         .driver = {
1312                 .name   = "ideapad_acpi",
1313                 .pm     = &ideapad_pm,
1314                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
1315         },
1316 };
1317
1318 module_platform_driver(ideapad_acpi_driver);
1319
1320 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1321 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1322 MODULE_LICENSE("GPL");