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