drivers/platform/x86/ideapad-laptop.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
   4  *
   5  *  Copyright © 2010 Intel Corporation
   6  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
   7  */
   8
   9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  10
  11 #include <linux/acpi.h>
  12 #include <linux/backlight.h>
  13 #include <linux/bitops.h>
  14 #include <linux/bug.h>
  15 #include <linux/debugfs.h>
  16 #include <linux/device.h>
  17 #include <linux/dmi.h>
  18 #include <linux/fb.h>
  19 #include <linux/i8042.h>
  20 #include <linux/init.h>
  21 #include <linux/input.h>
  22 #include <linux/input/sparse-keymap.h>
  23 #include <linux/jiffies.h>
  24 #include <linux/kernel.h>
  25 #include <linux/leds.h>
  26 #include <linux/module.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/platform_profile.h>
  29 #include <linux/rfkill.h>
  30 #include <linux/seq_file.h>
  31 #include <linux/sysfs.h>
  32 #include <linux/types.h>
  33
  34 #include <acpi/video.h>
  35
  36 #include <dt-bindings/leds/common.h>
  37
  38 #define IDEAPAD_RFKILL_DEV_NUM  3
  39
  40 #if IS_ENABLED(CONFIG_ACPI_WMI)
  41 static const char *const ideapad_wmi_fnesc_events[] = {
  42         "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
  43         "56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
  44         "8FC0DE0C-B4E4-43FD-B0F3-8871711C1294", /* Legion 5 */
  45 };
  46 #endif
  47
  48 enum {
  49         CFG_CAP_BT_BIT       = 16,
  50         CFG_CAP_3G_BIT       = 17,
  51         CFG_CAP_WIFI_BIT     = 18,
  52         CFG_CAP_CAM_BIT      = 19,
  53         CFG_CAP_TOUCHPAD_BIT = 30,
  54 };
  55
  56 enum {
  57         GBMD_CONSERVATION_STATE_BIT = 5,
  58 };
  59
  60 enum {
  61         SBMC_CONSERVATION_ON  = 3,
  62         SBMC_CONSERVATION_OFF = 5,
  63 };
  64
  65 enum {
  66         HALS_KBD_BL_SUPPORT_BIT       = 4,
  67         HALS_KBD_BL_STATE_BIT         = 5,
  68         HALS_USB_CHARGING_SUPPORT_BIT = 6,
  69         HALS_USB_CHARGING_STATE_BIT   = 7,
  70         HALS_FNLOCK_SUPPORT_BIT       = 9,
  71         HALS_FNLOCK_STATE_BIT         = 10,
  72         HALS_HOTKEYS_PRIMARY_BIT      = 11,
  73 };
  74
  75 enum {
  76         SALS_KBD_BL_ON        = 0x8,
  77         SALS_KBD_BL_OFF       = 0x9,
  78         SALS_USB_CHARGING_ON  = 0xa,
  79         SALS_USB_CHARGING_OFF = 0xb,
  80         SALS_FNLOCK_ON        = 0xe,
  81         SALS_FNLOCK_OFF       = 0xf,
  82 };
  83
  84 enum {
  85         VPCCMD_R_VPC1 = 0x10,
  86         VPCCMD_R_BL_MAX,
  87         VPCCMD_R_BL,
  88         VPCCMD_W_BL,
  89         VPCCMD_R_WIFI,
  90         VPCCMD_W_WIFI,
  91         VPCCMD_R_BT,
  92         VPCCMD_W_BT,
  93         VPCCMD_R_BL_POWER,
  94         VPCCMD_R_NOVO,
  95         VPCCMD_R_VPC2,
  96         VPCCMD_R_TOUCHPAD,
  97         VPCCMD_W_TOUCHPAD,
  98         VPCCMD_R_CAMERA,
  99         VPCCMD_W_CAMERA,
 100         VPCCMD_R_3G,
 101         VPCCMD_W_3G,
 102         VPCCMD_R_ODD, /* 0x21 */
 103         VPCCMD_W_FAN,
 104         VPCCMD_R_RF,
 105         VPCCMD_W_RF,
 106         VPCCMD_R_FAN = 0x2B,
 107         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
 108         VPCCMD_W_BL_POWER = 0x33,
 109 };
 110
 111 struct ideapad_dytc_priv {
 112         enum platform_profile_option current_profile;
 113         struct platform_profile_handler pprof;
 114         struct mutex mutex; /* protects the DYTC interface */
 115         struct ideapad_private *priv;
 116 };
 117
 118 struct ideapad_rfk_priv {
 119         int dev;
 120         struct ideapad_private *priv;
 121 };
 122
 123 struct ideapad_private {
 124         struct acpi_device *adev;
 125         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
 126         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
 127         struct platform_device *platform_device;
 128         struct input_dev *inputdev;
 129         struct backlight_device *blightdev;
 130         struct ideapad_dytc_priv *dytc;
 131         struct dentry *debug;
 132         unsigned long cfg;
 133         const char *fnesc_guid;
 134         struct {
 135                 bool conservation_mode    : 1;
 136                 bool dytc                 : 1;
 137                 bool fan_mode             : 1;
 138                 bool fn_lock              : 1;
 139                 bool hw_rfkill_switch     : 1;
 140                 bool kbd_bl               : 1;
 141                 bool touchpad_ctrl_via_ec : 1;
 142                 bool usb_charging         : 1;
 143         } features;
 144         struct {
 145                 bool initialized;
 146                 struct led_classdev led;
 147                 unsigned int last_brightness;
 148         } kbd_bl;
 149 };
 150
 151 static bool no_bt_rfkill;
 152 module_param(no_bt_rfkill, bool, 0444);
 153 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 154
 155 /*
 156  * ACPI Helpers
 157  */
 158 #define IDEAPAD_EC_TIMEOUT 200 /* in ms */
 159
 160 static int eval_int(acpi_handle handle, const char *name, unsigned long *res)
 161 {
 162         unsigned long long result;
 163         acpi_status status;
 164
 165         status = acpi_evaluate_integer(handle, (char *)name, NULL, &result);
 166         if (ACPI_FAILURE(status))
 167                 return -EIO;
 168
 169         *res = result;
 170
 171         return 0;
 172 }
 173
 174 static int exec_simple_method(acpi_handle handle, const char *name, unsigned long arg)
 175 {
 176         acpi_status status = acpi_execute_simple_method(handle, (char *)name, arg);
 177
 178         return ACPI_FAILURE(status) ? -EIO : 0;
 179 }
 180
 181 static int eval_gbmd(acpi_handle handle, unsigned long *res)
 182 {
 183         return eval_int(handle, "GBMD", res);
 184 }
 185
 186 static int exec_sbmc(acpi_handle handle, unsigned long arg)
 187 {
 188         return exec_simple_method(handle, "SBMC", arg);
 189 }
 190
 191 static int eval_hals(acpi_handle handle, unsigned long *res)
 192 {
 193         return eval_int(handle, "HALS", res);
 194 }
 195
 196 static int exec_sals(acpi_handle handle, unsigned long arg)
 197 {
 198         return exec_simple_method(handle, "SALS", arg);
 199 }
 200
 201 static int eval_int_with_arg(acpi_handle handle, const char *name, unsigned long arg, unsigned long *res)
 202 {
 203         struct acpi_object_list params;
 204         unsigned long long result;
 205         union acpi_object in_obj;
 206         acpi_status status;
 207
 208         params.count = 1;
 209         params.pointer = &in_obj;
 210         in_obj.type = ACPI_TYPE_INTEGER;
 211         in_obj.integer.value = arg;
 212
 213         status = acpi_evaluate_integer(handle, (char *)name, &params, &result);
 214         if (ACPI_FAILURE(status))
 215                 return -EIO;
 216
 217         if (res)
 218                 *res = result;
 219
 220         return 0;
 221 }
 222
 223 static int eval_dytc(acpi_handle handle, unsigned long cmd, unsigned long *res)
 224 {
 225         return eval_int_with_arg(handle, "DYTC", cmd, res);
 226 }
 227
 228 static int eval_vpcr(acpi_handle handle, unsigned long cmd, unsigned long *res)
 229 {
 230         return eval_int_with_arg(handle, "VPCR", cmd, res);
 231 }
 232
 233 static int eval_vpcw(acpi_handle handle, unsigned long cmd, unsigned long data)
 234 {
 235         struct acpi_object_list params;
 236         union acpi_object in_obj[2];
 237         acpi_status status;
 238
 239         params.count = 2;
 240         params.pointer = in_obj;
 241         in_obj[0].type = ACPI_TYPE_INTEGER;
 242         in_obj[0].integer.value = cmd;
 243         in_obj[1].type = ACPI_TYPE_INTEGER;
 244         in_obj[1].integer.value = data;
 245
 246         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 247         if (ACPI_FAILURE(status))
 248                 return -EIO;
 249
 250         return 0;
 251 }
 252
 253 static int read_ec_data(acpi_handle handle, unsigned long cmd, unsigned long *data)
 254 {
 255         unsigned long end_jiffies, val;
 256         int err;
 257
 258         err = eval_vpcw(handle, 1, cmd);
 259         if (err)
 260                 return err;
 261
 262         end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
 263
 264         while (time_before(jiffies, end_jiffies)) {
 265                 schedule();
 266
 267                 err = eval_vpcr(handle, 1, &val);
 268                 if (err)
 269                         return err;
 270
 271                 if (val == 0)
 272                         return eval_vpcr(handle, 0, data);
 273         }
 274
 275         acpi_handle_err(handle, "timeout in %s\n", __func__);
 276
 277         return -ETIMEDOUT;
 278 }
 279
 280 static int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long data)
 281 {
 282         unsigned long end_jiffies, val;
 283         int err;
 284
 285         err = eval_vpcw(handle, 0, data);
 286         if (err)
 287                 return err;
 288
 289         err = eval_vpcw(handle, 1, cmd);
 290         if (err)
 291                 return err;
 292
 293         end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
 294
 295         while (time_before(jiffies, end_jiffies)) {
 296                 schedule();
 297
 298                 err = eval_vpcr(handle, 1, &val);
 299                 if (err)
 300                         return err;
 301
 302                 if (val == 0)
 303                         return 0;
 304         }
 305
 306         acpi_handle_err(handle, "timeout in %s\n", __func__);
 307
 308         return -ETIMEDOUT;
 309 }
 310
 311 /*
 312  * debugfs
 313  */
 314 static int debugfs_status_show(struct seq_file *s, void *data)
 315 {
 316         struct ideapad_private *priv = s->private;
 317         unsigned long value;
 318
 319         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
 320                 seq_printf(s, "Backlight max:  %lu\n", value);
 321         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
 322                 seq_printf(s, "Backlight now:  %lu\n", value);
 323         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
 324                 seq_printf(s, "BL power value: %s (%lu)\n", value ? "on" : "off", value);
 325
 326         seq_puts(s, "=====================\n");
 327
 328         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
 329                 seq_printf(s, "Radio status: %s (%lu)\n", value ? "on" : "off", value);
 330         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
 331                 seq_printf(s, "Wifi status:  %s (%lu)\n", value ? "on" : "off", value);
 332         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
 333                 seq_printf(s, "BT status:    %s (%lu)\n", value ? "on" : "off", value);
 334         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
 335                 seq_printf(s, "3G status:    %s (%lu)\n", value ? "on" : "off", value);
 336
 337         seq_puts(s, "=====================\n");
 338
 339         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
 340                 seq_printf(s, "Touchpad status: %s (%lu)\n", value ? "on" : "off", value);
 341         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
 342                 seq_printf(s, "Camera status:   %s (%lu)\n", value ? "on" : "off", value);
 343
 344         seq_puts(s, "=====================\n");
 345
 346         if (!eval_gbmd(priv->adev->handle, &value))
 347                 seq_printf(s, "GBMD: %#010lx\n", value);
 348         if (!eval_hals(priv->adev->handle, &value))
 349                 seq_printf(s, "HALS: %#010lx\n", value);
 350
 351         return 0;
 352 }
 353 DEFINE_SHOW_ATTRIBUTE(debugfs_status);
 354
 355 static int debugfs_cfg_show(struct seq_file *s, void *data)
 356 {
 357         struct ideapad_private *priv = s->private;
 358
 359         seq_printf(s, "_CFG: %#010lx\n\n", priv->cfg);
 360
 361         seq_puts(s, "Capabilities:");
 362         if (test_bit(CFG_CAP_BT_BIT, &priv->cfg))
 363                 seq_puts(s, " bluetooth");
 364         if (test_bit(CFG_CAP_3G_BIT, &priv->cfg))
 365                 seq_puts(s, " 3G");
 366         if (test_bit(CFG_CAP_WIFI_BIT, &priv->cfg))
 367                 seq_puts(s, " wifi");
 368         if (test_bit(CFG_CAP_CAM_BIT, &priv->cfg))
 369                 seq_puts(s, " camera");
 370         if (test_bit(CFG_CAP_TOUCHPAD_BIT, &priv->cfg))
 371                 seq_puts(s, " touchpad");
 372         seq_puts(s, "\n");
 373
 374         seq_puts(s, "Graphics: ");
 375         switch (priv->cfg & 0x700) {
 376         case 0x100:
 377                 seq_puts(s, "Intel");
 378                 break;
 379         case 0x200:
 380                 seq_puts(s, "ATI");
 381                 break;
 382         case 0x300:
 383                 seq_puts(s, "Nvidia");
 384                 break;
 385         case 0x400:
 386                 seq_puts(s, "Intel and ATI");
 387                 break;
 388         case 0x500:
 389                 seq_puts(s, "Intel and Nvidia");
 390                 break;
 391         }
 392         seq_puts(s, "\n");
 393
 394         return 0;
 395 }
 396 DEFINE_SHOW_ATTRIBUTE(debugfs_cfg);
 397
 398 static void ideapad_debugfs_init(struct ideapad_private *priv)
 399 {
 400         struct dentry *dir;
 401
 402         dir = debugfs_create_dir("ideapad", NULL);
 403         priv->debug = dir;
 404
 405         debugfs_create_file("cfg", 0444, dir, priv, &debugfs_cfg_fops);
 406         debugfs_create_file("status", 0444, dir, priv, &debugfs_status_fops);
 407 }
 408
 409 static void ideapad_debugfs_exit(struct ideapad_private *priv)
 410 {
 411         debugfs_remove_recursive(priv->debug);
 412         priv->debug = NULL;
 413 }
 414
 415 /*
 416  * sysfs
 417  */
 418 static ssize_t camera_power_show(struct device *dev,
 419                                  struct device_attribute *attr,
 420                                  char *buf)
 421 {
 422         struct ideapad_private *priv = dev_get_drvdata(dev);
 423         unsigned long result;
 424         int err;
 425
 426         err = read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result);
 427         if (err)
 428                 return err;
 429
 430         return sysfs_emit(buf, "%d\n", !!result);
 431 }
 432
 433 static ssize_t camera_power_store(struct device *dev,
 434                                   struct device_attribute *attr,
 435                                   const char *buf, size_t count)
 436 {
 437         struct ideapad_private *priv = dev_get_drvdata(dev);
 438         bool state;
 439         int err;
 440
 441         err = kstrtobool(buf, &state);
 442         if (err)
 443                 return err;
 444
 445         err = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
 446         if (err)
 447                 return err;
 448
 449         return count;
 450 }
 451
 452 static DEVICE_ATTR_RW(camera_power);
 453
 454 static ssize_t conservation_mode_show(struct device *dev,
 455                                       struct device_attribute *attr,
 456                                       char *buf)
 457 {
 458         struct ideapad_private *priv = dev_get_drvdata(dev);
 459         unsigned long result;
 460         int err;
 461
 462         err = eval_gbmd(priv->adev->handle, &result);
 463         if (err)
 464                 return err;
 465
 466         return sysfs_emit(buf, "%d\n", !!test_bit(GBMD_CONSERVATION_STATE_BIT, &result));
 467 }
 468
 469 static ssize_t conservation_mode_store(struct device *dev,
 470                                        struct device_attribute *attr,
 471                                        const char *buf, size_t count)
 472 {
 473         struct ideapad_private *priv = dev_get_drvdata(dev);
 474         bool state;
 475         int err;
 476
 477         err = kstrtobool(buf, &state);
 478         if (err)
 479                 return err;
 480
 481         err = exec_sbmc(priv->adev->handle, state ? SBMC_CONSERVATION_ON : SBMC_CONSERVATION_OFF);
 482         if (err)
 483                 return err;
 484
 485         return count;
 486 }
 487
 488 static DEVICE_ATTR_RW(conservation_mode);
 489
 490 static ssize_t fan_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         int err;
 497
 498         err = read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result);
 499         if (err)
 500                 return err;
 501
 502         return sysfs_emit(buf, "%lu\n", result);
 503 }
 504
 505 static ssize_t fan_mode_store(struct device *dev,
 506                               struct device_attribute *attr,
 507                               const char *buf, size_t count)
 508 {
 509         struct ideapad_private *priv = dev_get_drvdata(dev);
 510         unsigned int state;
 511         int err;
 512
 513         err = kstrtouint(buf, 0, &state);
 514         if (err)
 515                 return err;
 516
 517         if (state > 4 || state == 3)
 518                 return -EINVAL;
 519
 520         err = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
 521         if (err)
 522                 return err;
 523
 524         return count;
 525 }
 526
 527 static DEVICE_ATTR_RW(fan_mode);
 528
 529 static ssize_t fn_lock_show(struct device *dev,
 530                             struct device_attribute *attr,
 531                             char *buf)
 532 {
 533         struct ideapad_private *priv = dev_get_drvdata(dev);
 534         unsigned long hals;
 535         int err;
 536
 537         err = eval_hals(priv->adev->handle, &hals);
 538         if (err)
 539                 return err;
 540
 541         return sysfs_emit(buf, "%d\n", !!test_bit(HALS_FNLOCK_STATE_BIT, &hals));
 542 }
 543
 544 static ssize_t fn_lock_store(struct device *dev,
 545                              struct device_attribute *attr,
 546                              const char *buf, size_t count)
 547 {
 548         struct ideapad_private *priv = dev_get_drvdata(dev);
 549         bool state;
 550         int err;
 551
 552         err = kstrtobool(buf, &state);
 553         if (err)
 554                 return err;
 555
 556         err = exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
 557         if (err)
 558                 return err;
 559
 560         return count;
 561 }
 562
 563 static DEVICE_ATTR_RW(fn_lock);
 564
 565 static ssize_t touchpad_show(struct device *dev,
 566                              struct device_attribute *attr,
 567                              char *buf)
 568 {
 569         struct ideapad_private *priv = dev_get_drvdata(dev);
 570         unsigned long result;
 571         int err;
 572
 573         err = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result);
 574         if (err)
 575                 return err;
 576
 577         return sysfs_emit(buf, "%d\n", !!result);
 578 }
 579
 580 static ssize_t touchpad_store(struct device *dev,
 581                               struct device_attribute *attr,
 582                               const char *buf, size_t count)
 583 {
 584         struct ideapad_private *priv = dev_get_drvdata(dev);
 585         bool state;
 586         int err;
 587
 588         err = kstrtobool(buf, &state);
 589         if (err)
 590                 return err;
 591
 592         err = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
 593         if (err)
 594                 return err;
 595
 596         return count;
 597 }
 598
 599 static DEVICE_ATTR_RW(touchpad);
 600
 601 static ssize_t usb_charging_show(struct device *dev,
 602                                  struct device_attribute *attr,
 603                                  char *buf)
 604 {
 605         struct ideapad_private *priv = dev_get_drvdata(dev);
 606         unsigned long hals;
 607         int err;
 608
 609         err = eval_hals(priv->adev->handle, &hals);
 610         if (err)
 611                 return err;
 612
 613         return sysfs_emit(buf, "%d\n", !!test_bit(HALS_USB_CHARGING_STATE_BIT, &hals));
 614 }
 615
 616 static ssize_t usb_charging_store(struct device *dev,
 617                                   struct device_attribute *attr,
 618                                   const char *buf, size_t count)
 619 {
 620         struct ideapad_private *priv = dev_get_drvdata(dev);
 621         bool state;
 622         int err;
 623
 624         err = kstrtobool(buf, &state);
 625         if (err)
 626                 return err;
 627
 628         err = exec_sals(priv->adev->handle, state ? SALS_USB_CHARGING_ON : SALS_USB_CHARGING_OFF);
 629         if (err)
 630                 return err;
 631
 632         return count;
 633 }
 634
 635 static DEVICE_ATTR_RW(usb_charging);
 636
 637 static struct attribute *ideapad_attributes[] = {
 638         &dev_attr_camera_power.attr,
 639         &dev_attr_conservation_mode.attr,
 640         &dev_attr_fan_mode.attr,
 641         &dev_attr_fn_lock.attr,
 642         &dev_attr_touchpad.attr,
 643         &dev_attr_usb_charging.attr,
 644         NULL
 645 };
 646
 647 static umode_t ideapad_is_visible(struct kobject *kobj,
 648                                   struct attribute *attr,
 649                                   int idx)
 650 {
 651         struct device *dev = kobj_to_dev(kobj);
 652         struct ideapad_private *priv = dev_get_drvdata(dev);
 653         bool supported = true;
 654
 655         if (attr == &dev_attr_camera_power.attr)
 656                 supported = test_bit(CFG_CAP_CAM_BIT, &priv->cfg);
 657         else if (attr == &dev_attr_conservation_mode.attr)
 658                 supported = priv->features.conservation_mode;
 659         else if (attr == &dev_attr_fan_mode.attr)
 660                 supported = priv->features.fan_mode;
 661         else if (attr == &dev_attr_fn_lock.attr)
 662                 supported = priv->features.fn_lock;
 663         else if (attr == &dev_attr_touchpad.attr)
 664                 supported = priv->features.touchpad_ctrl_via_ec &&
 665                             test_bit(CFG_CAP_TOUCHPAD_BIT, &priv->cfg);
 666         else if (attr == &dev_attr_usb_charging.attr)
 667                 supported = priv->features.usb_charging;
 668
 669         return supported ? attr->mode : 0;
 670 }
 671
 672 static const struct attribute_group ideapad_attribute_group = {
 673         .is_visible = ideapad_is_visible,
 674         .attrs = ideapad_attributes
 675 };
 676
 677 /*
 678  * DYTC Platform profile
 679  */
 680 #define DYTC_CMD_QUERY        0 /* To get DYTC status - enable/revision */
 681 #define DYTC_CMD_SET          1 /* To enable/disable IC function mode */
 682 #define DYTC_CMD_GET          2 /* To get current IC function and mode */
 683 #define DYTC_CMD_RESET    0x1ff /* To reset back to default */
 684
 685 #define DYTC_QUERY_ENABLE_BIT 8  /* Bit        8 - 0 = disabled, 1 = enabled */
 686 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
 687 #define DYTC_QUERY_REV_BIT    28 /* Bits 28 - 31 - revision */
 688
 689 #define DYTC_GET_FUNCTION_BIT 8  /* Bits  8-11 - function setting */
 690 #define DYTC_GET_MODE_BIT     12 /* Bits 12-15 - mode setting */
 691
 692 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
 693 #define DYTC_SET_MODE_BIT     16 /* Bits 16-19 - mode setting */
 694 #define DYTC_SET_VALID_BIT    20 /* Bit     20 - 1 = on, 0 = off */
 695
 696 #define DYTC_FUNCTION_STD     0  /* Function = 0, standard mode */
 697 #define DYTC_FUNCTION_CQL     1  /* Function = 1, lap mode */
 698 #define DYTC_FUNCTION_MMC     11 /* Function = 11, desk mode */
 699
 700 #define DYTC_MODE_PERFORM     2  /* High power mode aka performance */
 701 #define DYTC_MODE_LOW_POWER       3  /* Low power mode aka quiet */
 702 #define DYTC_MODE_BALANCE   0xF  /* Default mode aka balanced */
 703
 704 #define DYTC_SET_COMMAND(function, mode, on) \
 705         (DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
 706          (mode) << DYTC_SET_MODE_BIT | \
 707          (on) << DYTC_SET_VALID_BIT)
 708
 709 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 0)
 710
 711 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 1)
 712
 713 static int convert_dytc_to_profile(int dytcmode, enum platform_profile_option *profile)
 714 {
 715         switch (dytcmode) {
 716         case DYTC_MODE_LOW_POWER:
 717                 *profile = PLATFORM_PROFILE_LOW_POWER;
 718                 break;
 719         case DYTC_MODE_BALANCE:
 720                 *profile =  PLATFORM_PROFILE_BALANCED;
 721                 break;
 722         case DYTC_MODE_PERFORM:
 723                 *profile =  PLATFORM_PROFILE_PERFORMANCE;
 724                 break;
 725         default: /* Unknown mode */
 726                 return -EINVAL;
 727         }
 728
 729         return 0;
 730 }
 731
 732 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
 733 {
 734         switch (profile) {
 735         case PLATFORM_PROFILE_LOW_POWER:
 736                 *perfmode = DYTC_MODE_LOW_POWER;
 737                 break;
 738         case PLATFORM_PROFILE_BALANCED:
 739                 *perfmode = DYTC_MODE_BALANCE;
 740                 break;
 741         case PLATFORM_PROFILE_PERFORMANCE:
 742                 *perfmode = DYTC_MODE_PERFORM;
 743                 break;
 744         default: /* Unknown profile */
 745                 return -EOPNOTSUPP;
 746         }
 747
 748         return 0;
 749 }
 750
 751 /*
 752  * dytc_profile_get: Function to register with platform_profile
 753  * handler. Returns current platform profile.
 754  */
 755 static int dytc_profile_get(struct platform_profile_handler *pprof,
 756                             enum platform_profile_option *profile)
 757 {
 758         struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
 759
 760         *profile = dytc->current_profile;
 761         return 0;
 762 }
 763
 764 /*
 765  * Helper function - check if we are in CQL mode and if we are
 766  *  - disable CQL,
 767  *  - run the command
 768  *  - enable CQL
 769  *  If not in CQL mode, just run the command
 770  */
 771 static int dytc_cql_command(struct ideapad_private *priv, unsigned long cmd,
 772                             unsigned long *output)
 773 {
 774         int err, cmd_err, cur_funcmode;
 775
 776         /* Determine if we are in CQL mode. This alters the commands we do */
 777         err = eval_dytc(priv->adev->handle, DYTC_CMD_GET, output);
 778         if (err)
 779                 return err;
 780
 781         cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
 782         /* Check if we're OK to return immediately */
 783         if (cmd == DYTC_CMD_GET && cur_funcmode != DYTC_FUNCTION_CQL)
 784                 return 0;
 785
 786         if (cur_funcmode == DYTC_FUNCTION_CQL) {
 787                 err = eval_dytc(priv->adev->handle, DYTC_DISABLE_CQL, NULL);
 788                 if (err)
 789                         return err;
 790         }
 791
 792         cmd_err = eval_dytc(priv->adev->handle, cmd, output);
 793         /* Check return condition after we've restored CQL state */
 794
 795         if (cur_funcmode == DYTC_FUNCTION_CQL) {
 796                 err = eval_dytc(priv->adev->handle, DYTC_ENABLE_CQL, NULL);
 797                 if (err)
 798                         return err;
 799         }
 800
 801         return cmd_err;
 802 }
 803
 804 /*
 805  * dytc_profile_set: Function to register with platform_profile
 806  * handler. Sets current platform profile.
 807  */
 808 static int dytc_profile_set(struct platform_profile_handler *pprof,
 809                             enum platform_profile_option profile)
 810 {
 811         struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
 812         struct ideapad_private *priv = dytc->priv;
 813         unsigned long output;
 814         int err;
 815
 816         err = mutex_lock_interruptible(&dytc->mutex);
 817         if (err)
 818                 return err;
 819
 820         if (profile == PLATFORM_PROFILE_BALANCED) {
 821                 /* To get back to balanced mode we just issue a reset command */
 822                 err = eval_dytc(priv->adev->handle, DYTC_CMD_RESET, NULL);
 823                 if (err)
 824                         goto unlock;
 825         } else {
 826                 int perfmode;
 827
 828                 err = convert_profile_to_dytc(profile, &perfmode);
 829                 if (err)
 830                         goto unlock;
 831
 832                 /* Determine if we are in CQL mode. This alters the commands we do */
 833                 err = dytc_cql_command(priv, DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
 834                                        &output);
 835                 if (err)
 836                         goto unlock;
 837         }
 838
 839         /* Success - update current profile */
 840         dytc->current_profile = profile;
 841
 842 unlock:
 843         mutex_unlock(&dytc->mutex);
 844
 845         return err;
 846 }
 847
 848 static void dytc_profile_refresh(struct ideapad_private *priv)
 849 {
 850         enum platform_profile_option profile;
 851         unsigned long output;
 852         int err, perfmode;
 853
 854         mutex_lock(&priv->dytc->mutex);
 855         err = dytc_cql_command(priv, DYTC_CMD_GET, &output);
 856         mutex_unlock(&priv->dytc->mutex);
 857         if (err)
 858                 return;
 859
 860         perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
 861
 862         if (convert_dytc_to_profile(perfmode, &profile))
 863                 return;
 864
 865         if (profile != priv->dytc->current_profile) {
 866                 priv->dytc->current_profile = profile;
 867                 platform_profile_notify();
 868         }
 869 }
 870
 871 static int ideapad_dytc_profile_init(struct ideapad_private *priv)
 872 {
 873         int err, dytc_version;
 874         unsigned long output;
 875
 876         if (!priv->features.dytc)
 877                 return -ENODEV;
 878
 879         err = eval_dytc(priv->adev->handle, DYTC_CMD_QUERY, &output);
 880         /* For all other errors we can flag the failure */
 881         if (err)
 882                 return err;
 883
 884         /* Check DYTC is enabled and supports mode setting */
 885         if (!test_bit(DYTC_QUERY_ENABLE_BIT, &output))
 886                 return -ENODEV;
 887
 888         dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
 889         if (dytc_version < 5)
 890                 return -ENODEV;
 891
 892         priv->dytc = kzalloc(sizeof(*priv->dytc), GFP_KERNEL);
 893         if (!priv->dytc)
 894                 return -ENOMEM;
 895
 896         mutex_init(&priv->dytc->mutex);
 897
 898         priv->dytc->priv = priv;
 899         priv->dytc->pprof.profile_get = dytc_profile_get;
 900         priv->dytc->pprof.profile_set = dytc_profile_set;
 901
 902         /* Setup supported modes */
 903         set_bit(PLATFORM_PROFILE_LOW_POWER, priv->dytc->pprof.choices);
 904         set_bit(PLATFORM_PROFILE_BALANCED, priv->dytc->pprof.choices);
 905         set_bit(PLATFORM_PROFILE_PERFORMANCE, priv->dytc->pprof.choices);
 906
 907         /* Create platform_profile structure and register */
 908         err = platform_profile_register(&priv->dytc->pprof);
 909         if (err)
 910                 goto pp_reg_failed;
 911
 912         /* Ensure initial values are correct */
 913         dytc_profile_refresh(priv);
 914
 915         return 0;
 916
 917 pp_reg_failed:
 918         mutex_destroy(&priv->dytc->mutex);
 919         kfree(priv->dytc);
 920         priv->dytc = NULL;
 921
 922         return err;
 923 }
 924
 925 static void ideapad_dytc_profile_exit(struct ideapad_private *priv)
 926 {
 927         if (!priv->dytc)
 928                 return;
 929
 930         platform_profile_remove();
 931         mutex_destroy(&priv->dytc->mutex);
 932         kfree(priv->dytc);
 933
 934         priv->dytc = NULL;
 935 }
 936
 937 /*
 938  * Rfkill
 939  */
 940 struct ideapad_rfk_data {
 941         char *name;
 942         int cfgbit;
 943         int opcode;
 944         int type;
 945 };
 946
 947 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
 948         { "ideapad_wlan",      CFG_CAP_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
 949         { "ideapad_bluetooth", CFG_CAP_BT_BIT,   VPCCMD_W_BT,   RFKILL_TYPE_BLUETOOTH },
 950         { "ideapad_3g",        CFG_CAP_3G_BIT,   VPCCMD_W_3G,   RFKILL_TYPE_WWAN },
 951 };
 952
 953 static int ideapad_rfk_set(void *data, bool blocked)
 954 {
 955         struct ideapad_rfk_priv *priv = data;
 956         int opcode = ideapad_rfk_data[priv->dev].opcode;
 957
 958         return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
 959 }
 960
 961 static const struct rfkill_ops ideapad_rfk_ops = {
 962         .set_block = ideapad_rfk_set,
 963 };
 964
 965 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 966 {
 967         unsigned long hw_blocked = 0;
 968         int i;
 969
 970         if (priv->features.hw_rfkill_switch) {
 971                 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
 972                         return;
 973                 hw_blocked = !hw_blocked;
 974         }
 975
 976         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 977                 if (priv->rfk[i])
 978                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 979 }
 980
 981 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
 982 {
 983         unsigned long rf_enabled;
 984         int err;
 985
 986         if (no_bt_rfkill && ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH) {
 987                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 988                 write_ec_cmd(priv->adev->handle, ideapad_rfk_data[dev].opcode, 1);
 989                 return 0;
 990         }
 991
 992         priv->rfk_priv[dev].dev = dev;
 993         priv->rfk_priv[dev].priv = priv;
 994
 995         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
 996                                       &priv->platform_device->dev,
 997                                       ideapad_rfk_data[dev].type,
 998                                       &ideapad_rfk_ops,
 999                                       &priv->rfk_priv[dev]);
1000         if (!priv->rfk[dev])
1001                 return -ENOMEM;
1002
1003         err = read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode - 1, &rf_enabled);
1004         if (err)
1005                 rf_enabled = 1;
1006
1007         rfkill_init_sw_state(priv->rfk[dev], !rf_enabled);
1008
1009         err = rfkill_register(priv->rfk[dev]);
1010         if (err)
1011                 rfkill_destroy(priv->rfk[dev]);
1012
1013         return err;
1014 }
1015
1016 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
1017 {
1018         if (!priv->rfk[dev])
1019                 return;
1020
1021         rfkill_unregister(priv->rfk[dev]);
1022         rfkill_destroy(priv->rfk[dev]);
1023 }
1024
1025 /*
1026  * Platform device
1027  */
1028 static int ideapad_sysfs_init(struct ideapad_private *priv)
1029 {
1030         return device_add_group(&priv->platform_device->dev,
1031                                 &ideapad_attribute_group);
1032 }
1033
1034 static void ideapad_sysfs_exit(struct ideapad_private *priv)
1035 {
1036         device_remove_group(&priv->platform_device->dev,
1037                             &ideapad_attribute_group);
1038 }
1039
1040 /*
1041  * input device
1042  */
1043 static const struct key_entry ideapad_keymap[] = {
1044         { KE_KEY,   6, { KEY_SWITCHVIDEOMODE } },
1045         { KE_KEY,   7, { KEY_CAMERA } },
1046         { KE_KEY,   8, { KEY_MICMUTE } },
1047         { KE_KEY,  11, { KEY_F16 } },
1048         { KE_KEY,  13, { KEY_WLAN } },
1049         { KE_KEY,  16, { KEY_PROG1 } },
1050         { KE_KEY,  17, { KEY_PROG2 } },
1051         { KE_KEY,  64, { KEY_PROG3 } },
1052         { KE_KEY,  65, { KEY_PROG4 } },
1053         { KE_KEY,  66, { KEY_TOUCHPAD_OFF } },
1054         { KE_KEY,  67, { KEY_TOUCHPAD_ON } },
1055         { KE_KEY, 128, { KEY_ESC } },
1056         { KE_END },
1057 };
1058
1059 static int ideapad_input_init(struct ideapad_private *priv)
1060 {
1061         struct input_dev *inputdev;
1062         int err;
1063
1064         inputdev = input_allocate_device();
1065         if (!inputdev)
1066                 return -ENOMEM;
1067
1068         inputdev->name = "Ideapad extra buttons";
1069         inputdev->phys = "ideapad/input0";
1070         inputdev->id.bustype = BUS_HOST;
1071         inputdev->dev.parent = &priv->platform_device->dev;
1072
1073         err = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
1074         if (err) {
1075                 dev_err(&priv->platform_device->dev,
1076                         "Could not set up input device keymap: %d\n", err);
1077                 goto err_free_dev;
1078         }
1079
1080         err = input_register_device(inputdev);
1081         if (err) {
1082                 dev_err(&priv->platform_device->dev,
1083                         "Could not register input device: %d\n", err);
1084                 goto err_free_dev;
1085         }
1086
1087         priv->inputdev = inputdev;
1088
1089         return 0;
1090
1091 err_free_dev:
1092         input_free_device(inputdev);
1093
1094         return err;
1095 }
1096
1097 static void ideapad_input_exit(struct ideapad_private *priv)
1098 {
1099         input_unregister_device(priv->inputdev);
1100         priv->inputdev = NULL;
1101 }
1102
1103 static void ideapad_input_report(struct ideapad_private *priv,
1104                                  unsigned long scancode)
1105 {
1106         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
1107 }
1108
1109 static void ideapad_input_novokey(struct ideapad_private *priv)
1110 {
1111         unsigned long long_pressed;
1112
1113         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
1114                 return;
1115
1116         if (long_pressed)
1117                 ideapad_input_report(priv, 17);
1118         else
1119                 ideapad_input_report(priv, 16);
1120 }
1121
1122 static void ideapad_check_special_buttons(struct ideapad_private *priv)
1123 {
1124         unsigned long bit, value;
1125
1126         if (read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value))
1127                 return;
1128
1129         for_each_set_bit (bit, &value, 16) {
1130                 switch (bit) {
1131                 case 6: /* Z570 */
1132                 case 0: /* Z580 */
1133                         /* Thermal Management button */
1134                         ideapad_input_report(priv, 65);
1135                         break;
1136                 case 1:
1137                         /* OneKey Theater button */
1138                         ideapad_input_report(priv, 64);
1139                         break;
1140                 default:
1141                         dev_info(&priv->platform_device->dev,
1142                                  "Unknown special button: %lu\n", bit);
1143                         break;
1144                 }
1145         }
1146 }
1147
1148 /*
1149  * backlight
1150  */
1151 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
1152 {
1153         struct ideapad_private *priv = bl_get_data(blightdev);
1154         unsigned long now;
1155         int err;
1156
1157         err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
1158         if (err)
1159                 return err;
1160
1161         return now;
1162 }
1163
1164 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
1165 {
1166         struct ideapad_private *priv = bl_get_data(blightdev);
1167         int err;
1168
1169         err = write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
1170                            blightdev->props.brightness);
1171         if (err)
1172                 return err;
1173
1174         err = write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
1175                            blightdev->props.power != FB_BLANK_POWERDOWN);
1176         if (err)
1177                 return err;
1178
1179         return 0;
1180 }
1181
1182 static const struct backlight_ops ideapad_backlight_ops = {
1183         .get_brightness = ideapad_backlight_get_brightness,
1184         .update_status = ideapad_backlight_update_status,
1185 };
1186
1187 static int ideapad_backlight_init(struct ideapad_private *priv)
1188 {
1189         struct backlight_device *blightdev;
1190         struct backlight_properties props;
1191         unsigned long max, now, power;
1192         int err;
1193
1194         err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max);
1195         if (err)
1196                 return err;
1197
1198         err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
1199         if (err)
1200                 return err;
1201
1202         err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power);
1203         if (err)
1204                 return err;
1205
1206         memset(&props, 0, sizeof(props));
1207
1208         props.max_brightness = max;
1209         props.type = BACKLIGHT_PLATFORM;
1210
1211         blightdev = backlight_device_register("ideapad",
1212                                               &priv->platform_device->dev,
1213                                               priv,
1214                                               &ideapad_backlight_ops,
1215                                               &props);
1216         if (IS_ERR(blightdev)) {
1217                 err = PTR_ERR(blightdev);
1218                 dev_err(&priv->platform_device->dev,
1219                         "Could not register backlight device: %d\n", err);
1220                 return err;
1221         }
1222
1223         priv->blightdev = blightdev;
1224         blightdev->props.brightness = now;
1225         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1226
1227         backlight_update_status(blightdev);
1228
1229         return 0;
1230 }
1231
1232 static void ideapad_backlight_exit(struct ideapad_private *priv)
1233 {
1234         backlight_device_unregister(priv->blightdev);
1235         priv->blightdev = NULL;
1236 }
1237
1238 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
1239 {
1240         struct backlight_device *blightdev = priv->blightdev;
1241         unsigned long power;
1242
1243         if (!blightdev)
1244                 return;
1245
1246         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
1247                 return;
1248
1249         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1250 }
1251
1252 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
1253 {
1254         unsigned long now;
1255
1256         /* if we control brightness via acpi video driver */
1257         if (!priv->blightdev)
1258                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
1259         else
1260                 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
1261 }
1262
1263 /*
1264  * keyboard backlight
1265  */
1266 static int ideapad_kbd_bl_brightness_get(struct ideapad_private *priv)
1267 {
1268         unsigned long hals;
1269         int err;
1270
1271         err = eval_hals(priv->adev->handle, &hals);
1272         if (err)
1273                 return err;
1274
1275         return !!test_bit(HALS_KBD_BL_STATE_BIT, &hals);
1276 }
1277
1278 static enum led_brightness ideapad_kbd_bl_led_cdev_brightness_get(struct led_classdev *led_cdev)
1279 {
1280         struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, kbd_bl.led);
1281
1282         return ideapad_kbd_bl_brightness_get(priv);
1283 }
1284
1285 static int ideapad_kbd_bl_brightness_set(struct ideapad_private *priv, unsigned int brightness)
1286 {
1287         int err = exec_sals(priv->adev->handle, brightness ? SALS_KBD_BL_ON : SALS_KBD_BL_OFF);
1288
1289         if (err)
1290                 return err;
1291
1292         priv->kbd_bl.last_brightness = brightness;
1293
1294         return 0;
1295 }
1296
1297 static int ideapad_kbd_bl_led_cdev_brightness_set(struct led_classdev *led_cdev,
1298                                                   enum led_brightness brightness)
1299 {
1300         struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, kbd_bl.led);
1301
1302         return ideapad_kbd_bl_brightness_set(priv, brightness);
1303 }
1304
1305 static void ideapad_kbd_bl_notify(struct ideapad_private *priv)
1306 {
1307         int brightness;
1308
1309         if (!priv->kbd_bl.initialized)
1310                 return;
1311
1312         brightness = ideapad_kbd_bl_brightness_get(priv);
1313         if (brightness < 0)
1314                 return;
1315
1316         if (brightness == priv->kbd_bl.last_brightness)
1317                 return;
1318
1319         priv->kbd_bl.last_brightness = brightness;
1320
1321         led_classdev_notify_brightness_hw_changed(&priv->kbd_bl.led, brightness);
1322 }
1323
1324 static int ideapad_kbd_bl_init(struct ideapad_private *priv)
1325 {
1326         int brightness, err;
1327
1328         if (!priv->features.kbd_bl)
1329                 return -ENODEV;
1330
1331         if (WARN_ON(priv->kbd_bl.initialized))
1332                 return -EEXIST;
1333
1334         brightness = ideapad_kbd_bl_brightness_get(priv);
1335         if (brightness < 0)
1336                 return brightness;
1337
1338         priv->kbd_bl.last_brightness = brightness;
1339
1340         priv->kbd_bl.led.name                    = "platform::" LED_FUNCTION_KBD_BACKLIGHT;
1341         priv->kbd_bl.led.max_brightness          = 1;
1342         priv->kbd_bl.led.brightness_get          = ideapad_kbd_bl_led_cdev_brightness_get;
1343         priv->kbd_bl.led.brightness_set_blocking = ideapad_kbd_bl_led_cdev_brightness_set;
1344         priv->kbd_bl.led.flags                   = LED_BRIGHT_HW_CHANGED;
1345
1346         err = led_classdev_register(&priv->platform_device->dev, &priv->kbd_bl.led);
1347         if (err)
1348                 return err;
1349
1350         priv->kbd_bl.initialized = true;
1351
1352         return 0;
1353 }
1354
1355 static void ideapad_kbd_bl_exit(struct ideapad_private *priv)
1356 {
1357         if (!priv->kbd_bl.initialized)
1358                 return;
1359
1360         priv->kbd_bl.initialized = false;
1361
1362         led_classdev_unregister(&priv->kbd_bl.led);
1363 }
1364
1365 /*
1366  * module init/exit
1367  */
1368 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
1369 {
1370         unsigned long value;
1371
1372         if (!priv->features.touchpad_ctrl_via_ec)
1373                 return;
1374
1375         /* Without reading from EC touchpad LED doesn't switch state */
1376         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
1377                 unsigned char param;
1378                 /*
1379                  * Some IdeaPads don't really turn off touchpad - they only
1380                  * switch the LED state. We (de)activate KBC AUX port to turn
1381                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
1382                  * KEY_TOUCHPAD_ON to not to get out of sync with LED
1383                  */
1384                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE : I8042_CMD_AUX_DISABLE);
1385                 ideapad_input_report(priv, value ? 67 : 66);
1386                 sysfs_notify(&priv->platform_device->dev.kobj, NULL, "touchpad");
1387         }
1388 }
1389
1390 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
1391 {
1392         struct ideapad_private *priv = data;
1393         unsigned long vpc1, vpc2, bit;
1394
1395         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
1396                 return;
1397
1398         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
1399                 return;
1400
1401         vpc1 = (vpc2 << 8) | vpc1;
1402
1403         for_each_set_bit (bit, &vpc1, 16) {
1404                 switch (bit) {
1405                 case 13:
1406                 case 11:
1407                 case 8:
1408                 case 7:
1409                 case 6:
1410                         ideapad_input_report(priv, bit);
1411                         break;
1412                 case 10:
1413                         /*
1414                          * This event gets send on a Yoga 300-11IBR when the EC
1415                          * believes that the device has changed between laptop/
1416                          * tent/stand/tablet mode. The EC relies on getting
1417                          * angle info from 2 accelerometers through a special
1418                          * windows service calling a DSM on the DUAL250E ACPI-
1419                          * device. Linux does not do this, making the laptop/
1420                          * tent/stand/tablet mode info unreliable, so we simply
1421                          * ignore these events.
1422                          */
1423                         break;
1424                 case 9:
1425                         ideapad_sync_rfk_state(priv);
1426                         break;
1427                 case 5:
1428                         ideapad_sync_touchpad_state(priv);
1429                         break;
1430                 case 4:
1431                         ideapad_backlight_notify_brightness(priv);
1432                         break;
1433                 case 3:
1434                         ideapad_input_novokey(priv);
1435                         break;
1436                 case 2:
1437                         ideapad_backlight_notify_power(priv);
1438                         break;
1439                 case 1:
1440                         /*
1441                          * Some IdeaPads report event 1 every ~20
1442                          * seconds while on battery power; some
1443                          * report this when changing to/from tablet
1444                          * mode; some report this when the keyboard
1445                          * backlight has changed.
1446                          */
1447                         ideapad_kbd_bl_notify(priv);
1448                         break;
1449                 case 0:
1450                         ideapad_check_special_buttons(priv);
1451                         break;
1452                 default:
1453                         dev_info(&priv->platform_device->dev,
1454                                  "Unknown event: %lu\n", bit);
1455                 }
1456         }
1457 }
1458
1459 #if IS_ENABLED(CONFIG_ACPI_WMI)
1460 static void ideapad_wmi_notify(u32 value, void *context)
1461 {
1462         struct ideapad_private *priv = context;
1463         unsigned long result;
1464
1465         switch (value) {
1466         case 128:
1467                 ideapad_input_report(priv, value);
1468                 break;
1469         case 208:
1470                 if (!eval_hals(priv->adev->handle, &result)) {
1471                         bool state = test_bit(HALS_FNLOCK_STATE_BIT, &result);
1472
1473                         exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
1474                 }
1475                 break;
1476         default:
1477                 dev_info(&priv->platform_device->dev,
1478                          "Unknown WMI event: %u\n", value);
1479         }
1480 }
1481 #endif
1482
1483 /*
1484  * Some ideapads have a hardware rfkill switch, but most do not have one.
1485  * Reading VPCCMD_R_RF always results in 0 on models without a hardware rfkill,
1486  * switch causing ideapad_laptop to wrongly report all radios as hw-blocked.
1487  * There used to be a long list of DMI ids for models without a hw rfkill
1488  * switch here, but that resulted in playing whack a mole.
1489  * More importantly wrongly reporting the wifi radio as hw-blocked, results in
1490  * non working wifi. Whereas not reporting it hw-blocked, when it actually is
1491  * hw-blocked results in an empty SSID list, which is a much more benign
1492  * failure mode.
1493  * So the default now is the much safer option of assuming there is no
1494  * hardware rfkill switch. This default also actually matches most hardware,
1495  * since having a hw rfkill switch is quite rare on modern hardware, so this
1496  * also leads to a much shorter list.
1497  */
1498 static const struct dmi_system_id hw_rfkill_list[] = {
1499         {}
1500 };
1501
1502 static void ideapad_check_features(struct ideapad_private *priv)
1503 {
1504         acpi_handle handle = priv->adev->handle;
1505         unsigned long val;
1506
1507         priv->features.hw_rfkill_switch = dmi_check_system(hw_rfkill_list);
1508
1509         /* Most ideapads with ELAN0634 touchpad don't use EC touchpad switch */
1510         priv->features.touchpad_ctrl_via_ec = !acpi_dev_present("ELAN0634", NULL, -1);
1511
1512         if (!read_ec_data(handle, VPCCMD_R_FAN, &val))
1513                 priv->features.fan_mode = true;
1514
1515         if (acpi_has_method(handle, "GBMD") && acpi_has_method(handle, "SBMC"))
1516                 priv->features.conservation_mode = true;
1517
1518         if (acpi_has_method(handle, "DYTC"))
1519                 priv->features.dytc = true;
1520
1521         if (acpi_has_method(handle, "HALS") && acpi_has_method(handle, "SALS")) {
1522                 if (!eval_hals(handle, &val)) {
1523                         if (test_bit(HALS_FNLOCK_SUPPORT_BIT, &val))
1524                                 priv->features.fn_lock = true;
1525
1526                         if (test_bit(HALS_KBD_BL_SUPPORT_BIT, &val))
1527                                 priv->features.kbd_bl = true;
1528
1529                         if (test_bit(HALS_USB_CHARGING_SUPPORT_BIT, &val))
1530                                 priv->features.usb_charging = true;
1531                 }
1532         }
1533 }
1534
1535 static int ideapad_acpi_add(struct platform_device *pdev)
1536 {
1537         struct ideapad_private *priv;
1538         struct acpi_device *adev;
1539         acpi_status status;
1540         unsigned long cfg;
1541         int err, i;
1542
1543         err = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
1544         if (err)
1545                 return -ENODEV;
1546
1547         if (eval_int(adev->handle, "_CFG", &cfg))
1548                 return -ENODEV;
1549
1550         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1551         if (!priv)
1552                 return -ENOMEM;
1553
1554         dev_set_drvdata(&pdev->dev, priv);
1555
1556         priv->cfg = cfg;
1557         priv->adev = adev;
1558         priv->platform_device = pdev;
1559
1560         ideapad_check_features(priv);
1561
1562         err = ideapad_sysfs_init(priv);
1563         if (err)
1564                 return err;
1565
1566         ideapad_debugfs_init(priv);
1567
1568         err = ideapad_input_init(priv);
1569         if (err)
1570                 goto input_failed;
1571
1572         err = ideapad_kbd_bl_init(priv);
1573         if (err) {
1574                 if (err != -ENODEV)
1575                         dev_warn(&pdev->dev, "Could not set up keyboard backlight LED: %d\n", err);
1576                 else
1577                         dev_info(&pdev->dev, "Keyboard backlight control not available\n");
1578         }
1579
1580         /*
1581          * On some models without a hw-switch (the yoga 2 13 at least)
1582          * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
1583          */
1584         if (!priv->features.hw_rfkill_switch)
1585                 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
1586
1587         /* The same for Touchpad */
1588         if (!priv->features.touchpad_ctrl_via_ec)
1589                 write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, 1);
1590
1591         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1592                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
1593                         ideapad_register_rfkill(priv, i);
1594
1595         ideapad_sync_rfk_state(priv);
1596         ideapad_sync_touchpad_state(priv);
1597
1598         err = ideapad_dytc_profile_init(priv);
1599         if (err) {
1600                 if (err != -ENODEV)
1601                         dev_warn(&pdev->dev, "Could not set up DYTC interface: %d\n", err);
1602                 else
1603                         dev_info(&pdev->dev, "DYTC interface is not available\n");
1604         }
1605
1606         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1607                 err = ideapad_backlight_init(priv);
1608                 if (err && err != -ENODEV)
1609                         goto backlight_failed;
1610         }
1611
1612         status = acpi_install_notify_handler(adev->handle,
1613                                              ACPI_DEVICE_NOTIFY,
1614                                              ideapad_acpi_notify, priv);
1615         if (ACPI_FAILURE(status)) {
1616                 err = -EIO;
1617                 goto notification_failed;
1618         }
1619
1620 #if IS_ENABLED(CONFIG_ACPI_WMI)
1621         for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
1622                 status = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
1623                                                     ideapad_wmi_notify, priv);
1624                 if (ACPI_SUCCESS(status)) {
1625                         priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
1626                         break;
1627                 }
1628         }
1629
1630         if (ACPI_FAILURE(status) && status != AE_NOT_EXIST) {
1631                 err = -EIO;
1632                 goto notification_failed_wmi;
1633         }
1634 #endif
1635
1636         return 0;
1637
1638 #if IS_ENABLED(CONFIG_ACPI_WMI)
1639 notification_failed_wmi:
1640         acpi_remove_notify_handler(priv->adev->handle,
1641                                    ACPI_DEVICE_NOTIFY,
1642                                    ideapad_acpi_notify);
1643 #endif
1644
1645 notification_failed:
1646         ideapad_backlight_exit(priv);
1647
1648 backlight_failed:
1649         ideapad_dytc_profile_exit(priv);
1650
1651         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1652                 ideapad_unregister_rfkill(priv, i);
1653
1654         ideapad_kbd_bl_exit(priv);
1655         ideapad_input_exit(priv);
1656
1657 input_failed:
1658         ideapad_debugfs_exit(priv);
1659         ideapad_sysfs_exit(priv);
1660
1661         return err;
1662 }
1663
1664 static int ideapad_acpi_remove(struct platform_device *pdev)
1665 {
1666         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
1667         int i;
1668
1669 #if IS_ENABLED(CONFIG_ACPI_WMI)
1670         if (priv->fnesc_guid)
1671                 wmi_remove_notify_handler(priv->fnesc_guid);
1672 #endif
1673
1674         acpi_remove_notify_handler(priv->adev->handle,
1675                                    ACPI_DEVICE_NOTIFY,
1676                                    ideapad_acpi_notify);
1677
1678         ideapad_backlight_exit(priv);
1679         ideapad_dytc_profile_exit(priv);
1680
1681         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1682                 ideapad_unregister_rfkill(priv, i);
1683
1684         ideapad_kbd_bl_exit(priv);
1685         ideapad_input_exit(priv);
1686         ideapad_debugfs_exit(priv);
1687         ideapad_sysfs_exit(priv);
1688
1689         return 0;
1690 }
1691
1692 #ifdef CONFIG_PM_SLEEP
1693 static int ideapad_acpi_resume(struct device *dev)
1694 {
1695         struct ideapad_private *priv = dev_get_drvdata(dev);
1696
1697         ideapad_sync_rfk_state(priv);
1698         ideapad_sync_touchpad_state(priv);
1699
1700         if (priv->dytc)
1701                 dytc_profile_refresh(priv);
1702
1703         return 0;
1704 }
1705 #endif
1706 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
1707
1708 static const struct acpi_device_id ideapad_device_ids[] = {
1709         {"VPC2004", 0},
1710         {"", 0},
1711 };
1712 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
1713
1714 static struct platform_driver ideapad_acpi_driver = {
1715         .probe = ideapad_acpi_add,
1716         .remove = ideapad_acpi_remove,
1717         .driver = {
1718                 .name   = "ideapad_acpi",
1719                 .pm     = &ideapad_pm,
1720                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
1721         },
1722 };
1723
1724 module_platform_driver(ideapad_acpi_driver);
1725
1726 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1727 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1728 MODULE_LICENSE("GPL");