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/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/types.h>
  15 #include <linux/acpi.h>
  16 #include <linux/rfkill.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/input.h>
  19 #include <linux/input/sparse-keymap.h>
  20 #include <linux/backlight.h>
  21 #include <linux/fb.h>
  22 #include <linux/debugfs.h>
  23 #include <linux/seq_file.h>
  24 #include <linux/i8042.h>
  25 #include <linux/dmi.h>
  26 #include <linux/device.h>
  27 #include <acpi/video.h>
  28
  29 #define IDEAPAD_RFKILL_DEV_NUM  (3)
  30
  31 #define BM_CONSERVATION_BIT (5)
  32 #define HA_FNLOCK_BIT       (10)
  33
  34 #define CFG_BT_BIT      (16)
  35 #define CFG_3G_BIT      (17)
  36 #define CFG_WIFI_BIT    (18)
  37 #define CFG_CAMERA_BIT  (19)
  38
  39 #if IS_ENABLED(CONFIG_ACPI_WMI)
  40 static const char *const ideapad_wmi_fnesc_events[] = {
  41         "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
  42         "56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
  43 };
  44 #endif
  45
  46 enum {
  47         BMCMD_CONSERVATION_ON = 3,
  48         BMCMD_CONSERVATION_OFF = 5,
  49         HACMD_FNLOCK_ON = 0xe,
  50         HACMD_FNLOCK_OFF = 0xf,
  51 };
  52
  53 enum {
  54         VPCCMD_R_VPC1 = 0x10,
  55         VPCCMD_R_BL_MAX,
  56         VPCCMD_R_BL,
  57         VPCCMD_W_BL,
  58         VPCCMD_R_WIFI,
  59         VPCCMD_W_WIFI,
  60         VPCCMD_R_BT,
  61         VPCCMD_W_BT,
  62         VPCCMD_R_BL_POWER,
  63         VPCCMD_R_NOVO,
  64         VPCCMD_R_VPC2,
  65         VPCCMD_R_TOUCHPAD,
  66         VPCCMD_W_TOUCHPAD,
  67         VPCCMD_R_CAMERA,
  68         VPCCMD_W_CAMERA,
  69         VPCCMD_R_3G,
  70         VPCCMD_W_3G,
  71         VPCCMD_R_ODD, /* 0x21 */
  72         VPCCMD_W_FAN,
  73         VPCCMD_R_RF,
  74         VPCCMD_W_RF,
  75         VPCCMD_R_FAN = 0x2B,
  76         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
  77         VPCCMD_W_BL_POWER = 0x33,
  78 };
  79
  80 struct ideapad_rfk_priv {
  81         int dev;
  82         struct ideapad_private *priv;
  83 };
  84
  85 struct ideapad_private {
  86         struct acpi_device *adev;
  87         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
  88         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
  89         struct platform_device *platform_device;
  90         struct input_dev *inputdev;
  91         struct backlight_device *blightdev;
  92         struct dentry *debug;
  93         unsigned long cfg;
  94         bool has_hw_rfkill_switch;
  95         bool has_touchpad_switch;
  96         const char *fnesc_guid;
  97 };
  98
  99 static bool no_bt_rfkill;
 100 module_param(no_bt_rfkill, bool, 0444);
 101 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 102
 103 /*
 104  * ACPI Helpers
 105  */
 106 #define IDEAPAD_EC_TIMEOUT (200) /* in ms */
 107
 108 static int read_method_int(acpi_handle handle, const char *method, int *val)
 109 {
 110         acpi_status status;
 111         unsigned long long result;
 112
 113         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 114         if (ACPI_FAILURE(status)) {
 115                 *val = -1;
 116                 return -1;
 117         }
 118         *val = result;
 119         return 0;
 120
 121 }
 122
 123 static int method_gbmd(acpi_handle handle, unsigned long *ret)
 124 {
 125         int result, val;
 126
 127         result = read_method_int(handle, "GBMD", &val);
 128         *ret = val;
 129         return result;
 130 }
 131
 132 static int method_int1(acpi_handle handle, char *method, int cmd)
 133 {
 134         acpi_status status;
 135
 136         status = acpi_execute_simple_method(handle, method, cmd);
 137         return ACPI_FAILURE(status) ? -1 : 0;
 138 }
 139
 140 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
 141 {
 142         acpi_status status;
 143         unsigned long long result;
 144         struct acpi_object_list params;
 145         union acpi_object in_obj;
 146
 147         params.count = 1;
 148         params.pointer = &in_obj;
 149         in_obj.type = ACPI_TYPE_INTEGER;
 150         in_obj.integer.value = cmd;
 151
 152         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
 153
 154         if (ACPI_FAILURE(status)) {
 155                 *ret = -1;
 156                 return -1;
 157         }
 158         *ret = result;
 159         return 0;
 160
 161 }
 162
 163 static int method_vpcw(acpi_handle handle, int cmd, int data)
 164 {
 165         struct acpi_object_list params;
 166         union acpi_object in_obj[2];
 167         acpi_status status;
 168
 169         params.count = 2;
 170         params.pointer = in_obj;
 171         in_obj[0].type = ACPI_TYPE_INTEGER;
 172         in_obj[0].integer.value = cmd;
 173         in_obj[1].type = ACPI_TYPE_INTEGER;
 174         in_obj[1].integer.value = data;
 175
 176         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 177         if (status != AE_OK)
 178                 return -1;
 179         return 0;
 180 }
 181
 182 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 183 {
 184         int val;
 185         unsigned long int end_jiffies;
 186
 187         if (method_vpcw(handle, 1, cmd))
 188                 return -1;
 189
 190         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 191              time_before(jiffies, end_jiffies);) {
 192                 schedule();
 193                 if (method_vpcr(handle, 1, &val))
 194                         return -1;
 195                 if (val == 0) {
 196                         if (method_vpcr(handle, 0, &val))
 197                                 return -1;
 198                         *data = val;
 199                         return 0;
 200                 }
 201         }
 202         pr_err("timeout in %s\n", __func__);
 203         return -1;
 204 }
 205
 206 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 207 {
 208         int val;
 209         unsigned long int end_jiffies;
 210
 211         if (method_vpcw(handle, 0, data))
 212                 return -1;
 213         if (method_vpcw(handle, 1, cmd))
 214                 return -1;
 215
 216         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 217              time_before(jiffies, end_jiffies);) {
 218                 schedule();
 219                 if (method_vpcr(handle, 1, &val))
 220                         return -1;
 221                 if (val == 0)
 222                         return 0;
 223         }
 224         pr_err("timeout in %s\n", __func__);
 225         return -1;
 226 }
 227
 228 /*
 229  * debugfs
 230  */
 231 static int debugfs_status_show(struct seq_file *s, void *data)
 232 {
 233         struct ideapad_private *priv = s->private;
 234         unsigned long value;
 235
 236         if (!priv)
 237                 return -EINVAL;
 238
 239         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
 240                 seq_printf(s, "Backlight max:\t%lu\n", value);
 241         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
 242                 seq_printf(s, "Backlight now:\t%lu\n", value);
 243         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
 244                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
 245         seq_printf(s, "=====================\n");
 246
 247         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
 248                 seq_printf(s, "Radio status:\t%s(%lu)\n",
 249                            value ? "On" : "Off", value);
 250         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
 251                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
 252                            value ? "On" : "Off", value);
 253         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
 254                 seq_printf(s, "BT status:\t%s(%lu)\n",
 255                            value ? "On" : "Off", value);
 256         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
 257                 seq_printf(s, "3G status:\t%s(%lu)\n",
 258                            value ? "On" : "Off", value);
 259         seq_printf(s, "=====================\n");
 260
 261         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
 262                 seq_printf(s, "Touchpad status:%s(%lu)\n",
 263                            value ? "On" : "Off", value);
 264         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
 265                 seq_printf(s, "Camera status:\t%s(%lu)\n",
 266                            value ? "On" : "Off", value);
 267         seq_puts(s, "=====================\n");
 268
 269         if (!method_gbmd(priv->adev->handle, &value)) {
 270                 seq_printf(s, "Conservation mode:\t%s(%lu)\n",
 271                            test_bit(BM_CONSERVATION_BIT, &value) ? "On" : "Off",
 272                            value);
 273         }
 274
 275         return 0;
 276 }
 277 DEFINE_SHOW_ATTRIBUTE(debugfs_status);
 278
 279 static int debugfs_cfg_show(struct seq_file *s, void *data)
 280 {
 281         struct ideapad_private *priv = s->private;
 282
 283         if (!priv) {
 284                 seq_printf(s, "cfg: N/A\n");
 285         } else {
 286                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
 287                            priv->cfg);
 288                 if (test_bit(CFG_BT_BIT, &priv->cfg))
 289                         seq_printf(s, "Bluetooth ");
 290                 if (test_bit(CFG_3G_BIT, &priv->cfg))
 291                         seq_printf(s, "3G ");
 292                 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
 293                         seq_printf(s, "Wireless ");
 294                 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
 295                         seq_printf(s, "Camera ");
 296                 seq_printf(s, "\nGraphic: ");
 297                 switch ((priv->cfg)&0x700) {
 298                 case 0x100:
 299                         seq_printf(s, "Intel");
 300                         break;
 301                 case 0x200:
 302                         seq_printf(s, "ATI");
 303                         break;
 304                 case 0x300:
 305                         seq_printf(s, "Nvidia");
 306                         break;
 307                 case 0x400:
 308                         seq_printf(s, "Intel and ATI");
 309                         break;
 310                 case 0x500:
 311                         seq_printf(s, "Intel and Nvidia");
 312                         break;
 313                 }
 314                 seq_printf(s, "\n");
 315         }
 316         return 0;
 317 }
 318 DEFINE_SHOW_ATTRIBUTE(debugfs_cfg);
 319
 320 static void ideapad_debugfs_init(struct ideapad_private *priv)
 321 {
 322         struct dentry *dir;
 323
 324         dir = debugfs_create_dir("ideapad", NULL);
 325         priv->debug = dir;
 326
 327         debugfs_create_file("cfg", S_IRUGO, dir, priv, &debugfs_cfg_fops);
 328         debugfs_create_file("status", S_IRUGO, dir, priv, &debugfs_status_fops);
 329 }
 330
 331 static void ideapad_debugfs_exit(struct ideapad_private *priv)
 332 {
 333         debugfs_remove_recursive(priv->debug);
 334         priv->debug = NULL;
 335 }
 336
 337 /*
 338  * sysfs
 339  */
 340 static ssize_t show_ideapad_cam(struct device *dev,
 341                                 struct device_attribute *attr,
 342                                 char *buf)
 343 {
 344         unsigned long result;
 345         struct ideapad_private *priv = dev_get_drvdata(dev);
 346
 347         if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
 348                 return sprintf(buf, "-1\n");
 349         return sprintf(buf, "%lu\n", result);
 350 }
 351
 352 static ssize_t store_ideapad_cam(struct device *dev,
 353                                  struct device_attribute *attr,
 354                                  const char *buf, size_t count)
 355 {
 356         int ret, state;
 357         struct ideapad_private *priv = dev_get_drvdata(dev);
 358
 359         if (!count)
 360                 return 0;
 361         if (sscanf(buf, "%i", &state) != 1)
 362                 return -EINVAL;
 363         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
 364         if (ret < 0)
 365                 return -EIO;
 366         return count;
 367 }
 368
 369 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 370
 371 static ssize_t show_ideapad_fan(struct device *dev,
 372                                 struct device_attribute *attr,
 373                                 char *buf)
 374 {
 375         unsigned long result;
 376         struct ideapad_private *priv = dev_get_drvdata(dev);
 377
 378         if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
 379                 return sprintf(buf, "-1\n");
 380         return sprintf(buf, "%lu\n", result);
 381 }
 382
 383 static ssize_t store_ideapad_fan(struct device *dev,
 384                                  struct device_attribute *attr,
 385                                  const char *buf, size_t count)
 386 {
 387         int ret, state;
 388         struct ideapad_private *priv = dev_get_drvdata(dev);
 389
 390         if (!count)
 391                 return 0;
 392         if (sscanf(buf, "%i", &state) != 1)
 393                 return -EINVAL;
 394         if (state < 0 || state > 4 || state == 3)
 395                 return -EINVAL;
 396         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
 397         if (ret < 0)
 398                 return -EIO;
 399         return count;
 400 }
 401
 402 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
 403
 404 static ssize_t touchpad_show(struct device *dev,
 405                              struct device_attribute *attr,
 406                              char *buf)
 407 {
 408         struct ideapad_private *priv = dev_get_drvdata(dev);
 409         unsigned long result;
 410
 411         if (read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result))
 412                 return sprintf(buf, "-1\n");
 413         return sprintf(buf, "%lu\n", result);
 414 }
 415
 416 /* Switch to RO for now: It might be revisited in the future */
 417 static ssize_t __maybe_unused touchpad_store(struct device *dev,
 418                                              struct device_attribute *attr,
 419                                              const char *buf, size_t count)
 420 {
 421         struct ideapad_private *priv = dev_get_drvdata(dev);
 422         bool state;
 423         int ret;
 424
 425         ret = kstrtobool(buf, &state);
 426         if (ret)
 427                 return ret;
 428
 429         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
 430         if (ret < 0)
 431                 return -EIO;
 432         return count;
 433 }
 434
 435 static DEVICE_ATTR_RO(touchpad);
 436
 437 static ssize_t conservation_mode_show(struct device *dev,
 438                                 struct device_attribute *attr,
 439                                 char *buf)
 440 {
 441         struct ideapad_private *priv = dev_get_drvdata(dev);
 442         unsigned long result;
 443
 444         if (method_gbmd(priv->adev->handle, &result))
 445                 return sprintf(buf, "-1\n");
 446         return sprintf(buf, "%u\n", test_bit(BM_CONSERVATION_BIT, &result));
 447 }
 448
 449 static ssize_t conservation_mode_store(struct device *dev,
 450                                  struct device_attribute *attr,
 451                                  const char *buf, size_t count)
 452 {
 453         struct ideapad_private *priv = dev_get_drvdata(dev);
 454         bool state;
 455         int ret;
 456
 457         ret = kstrtobool(buf, &state);
 458         if (ret)
 459                 return ret;
 460
 461         ret = method_int1(priv->adev->handle, "SBMC", state ?
 462                                               BMCMD_CONSERVATION_ON :
 463                                               BMCMD_CONSERVATION_OFF);
 464         if (ret < 0)
 465                 return -EIO;
 466         return count;
 467 }
 468
 469 static DEVICE_ATTR_RW(conservation_mode);
 470
 471 static ssize_t fn_lock_show(struct device *dev,
 472                             struct device_attribute *attr,
 473                             char *buf)
 474 {
 475         struct ideapad_private *priv = dev_get_drvdata(dev);
 476         unsigned long result;
 477         int hals;
 478         int fail = read_method_int(priv->adev->handle, "HALS", &hals);
 479
 480         if (fail)
 481                 return sprintf(buf, "-1\n");
 482
 483         result = hals;
 484         return sprintf(buf, "%u\n", test_bit(HA_FNLOCK_BIT, &result));
 485 }
 486
 487 static ssize_t fn_lock_store(struct device *dev,
 488                              struct device_attribute *attr,
 489                              const char *buf, size_t count)
 490 {
 491         struct ideapad_private *priv = dev_get_drvdata(dev);
 492         bool state;
 493         int ret;
 494
 495         ret = kstrtobool(buf, &state);
 496         if (ret)
 497                 return ret;
 498
 499         ret = method_int1(priv->adev->handle, "SALS", state ?
 500                           HACMD_FNLOCK_ON :
 501                           HACMD_FNLOCK_OFF);
 502         if (ret < 0)
 503                 return -EIO;
 504         return count;
 505 }
 506
 507 static DEVICE_ATTR_RW(fn_lock);
 508
 509
 510 static struct attribute *ideapad_attributes[] = {
 511         &dev_attr_camera_power.attr,
 512         &dev_attr_fan_mode.attr,
 513         &dev_attr_touchpad.attr,
 514         &dev_attr_conservation_mode.attr,
 515         &dev_attr_fn_lock.attr,
 516         NULL
 517 };
 518
 519 static umode_t ideapad_is_visible(struct kobject *kobj,
 520                                  struct attribute *attr,
 521                                  int idx)
 522 {
 523         struct device *dev = container_of(kobj, struct device, kobj);
 524         struct ideapad_private *priv = dev_get_drvdata(dev);
 525         bool supported;
 526
 527         if (attr == &dev_attr_camera_power.attr)
 528                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
 529         else if (attr == &dev_attr_fan_mode.attr) {
 530                 unsigned long value;
 531                 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
 532                                           &value);
 533         } else if (attr == &dev_attr_conservation_mode.attr) {
 534                 supported = acpi_has_method(priv->adev->handle, "GBMD") &&
 535                             acpi_has_method(priv->adev->handle, "SBMC");
 536         } else if (attr == &dev_attr_fn_lock.attr) {
 537                 supported = acpi_has_method(priv->adev->handle, "HALS") &&
 538                         acpi_has_method(priv->adev->handle, "SALS");
 539         } else if (attr == &dev_attr_touchpad.attr)
 540                 supported = priv->has_touchpad_switch;
 541         else
 542                 supported = true;
 543
 544         return supported ? attr->mode : 0;
 545 }
 546
 547 static const struct attribute_group ideapad_attribute_group = {
 548         .is_visible = ideapad_is_visible,
 549         .attrs = ideapad_attributes
 550 };
 551
 552 /*
 553  * Rfkill
 554  */
 555 struct ideapad_rfk_data {
 556         char *name;
 557         int cfgbit;
 558         int opcode;
 559         int type;
 560 };
 561
 562 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
 563         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
 564         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
 565         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
 566 };
 567
 568 static int ideapad_rfk_set(void *data, bool blocked)
 569 {
 570         struct ideapad_rfk_priv *priv = data;
 571         int opcode = ideapad_rfk_data[priv->dev].opcode;
 572
 573         return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
 574 }
 575
 576 static const struct rfkill_ops ideapad_rfk_ops = {
 577         .set_block = ideapad_rfk_set,
 578 };
 579
 580 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 581 {
 582         unsigned long hw_blocked = 0;
 583         int i;
 584
 585         if (priv->has_hw_rfkill_switch) {
 586                 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
 587                         return;
 588                 hw_blocked = !hw_blocked;
 589         }
 590
 591         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 592                 if (priv->rfk[i])
 593                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 594 }
 595
 596 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
 597 {
 598         int ret;
 599         unsigned long sw_blocked;
 600
 601         if (no_bt_rfkill &&
 602             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 603                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 604                 write_ec_cmd(priv->adev->handle,
 605                              ideapad_rfk_data[dev].opcode, 1);
 606                 return 0;
 607         }
 608         priv->rfk_priv[dev].dev = dev;
 609         priv->rfk_priv[dev].priv = priv;
 610
 611         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
 612                                       &priv->platform_device->dev,
 613                                       ideapad_rfk_data[dev].type,
 614                                       &ideapad_rfk_ops,
 615                                       &priv->rfk_priv[dev]);
 616         if (!priv->rfk[dev])
 617                 return -ENOMEM;
 618
 619         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
 620                          &sw_blocked)) {
 621                 rfkill_init_sw_state(priv->rfk[dev], 0);
 622         } else {
 623                 sw_blocked = !sw_blocked;
 624                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 625         }
 626
 627         ret = rfkill_register(priv->rfk[dev]);
 628         if (ret) {
 629                 rfkill_destroy(priv->rfk[dev]);
 630                 return ret;
 631         }
 632         return 0;
 633 }
 634
 635 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
 636 {
 637         if (!priv->rfk[dev])
 638                 return;
 639
 640         rfkill_unregister(priv->rfk[dev]);
 641         rfkill_destroy(priv->rfk[dev]);
 642 }
 643
 644 /*
 645  * Platform device
 646  */
 647 static int ideapad_sysfs_init(struct ideapad_private *priv)
 648 {
 649         return sysfs_create_group(&priv->platform_device->dev.kobj,
 650                                     &ideapad_attribute_group);
 651 }
 652
 653 static void ideapad_sysfs_exit(struct ideapad_private *priv)
 654 {
 655         sysfs_remove_group(&priv->platform_device->dev.kobj,
 656                            &ideapad_attribute_group);
 657 }
 658
 659 /*
 660  * input device
 661  */
 662 static const struct key_entry ideapad_keymap[] = {
 663         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
 664         { KE_KEY, 7,  { KEY_CAMERA } },
 665         { KE_KEY, 8,  { KEY_MICMUTE } },
 666         { KE_KEY, 11, { KEY_F16 } },
 667         { KE_KEY, 13, { KEY_WLAN } },
 668         { KE_KEY, 16, { KEY_PROG1 } },
 669         { KE_KEY, 17, { KEY_PROG2 } },
 670         { KE_KEY, 64, { KEY_PROG3 } },
 671         { KE_KEY, 65, { KEY_PROG4 } },
 672         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
 673         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
 674         { KE_KEY, 128, { KEY_ESC } },
 675
 676         { KE_END, 0 },
 677 };
 678
 679 static int ideapad_input_init(struct ideapad_private *priv)
 680 {
 681         struct input_dev *inputdev;
 682         int error;
 683
 684         inputdev = input_allocate_device();
 685         if (!inputdev)
 686                 return -ENOMEM;
 687
 688         inputdev->name = "Ideapad extra buttons";
 689         inputdev->phys = "ideapad/input0";
 690         inputdev->id.bustype = BUS_HOST;
 691         inputdev->dev.parent = &priv->platform_device->dev;
 692
 693         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 694         if (error) {
 695                 pr_err("Unable to setup input device keymap\n");
 696                 goto err_free_dev;
 697         }
 698
 699         error = input_register_device(inputdev);
 700         if (error) {
 701                 pr_err("Unable to register input device\n");
 702                 goto err_free_dev;
 703         }
 704
 705         priv->inputdev = inputdev;
 706         return 0;
 707
 708 err_free_dev:
 709         input_free_device(inputdev);
 710         return error;
 711 }
 712
 713 static void ideapad_input_exit(struct ideapad_private *priv)
 714 {
 715         input_unregister_device(priv->inputdev);
 716         priv->inputdev = NULL;
 717 }
 718
 719 static void ideapad_input_report(struct ideapad_private *priv,
 720                                  unsigned long scancode)
 721 {
 722         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 723 }
 724
 725 static void ideapad_input_novokey(struct ideapad_private *priv)
 726 {
 727         unsigned long long_pressed;
 728
 729         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
 730                 return;
 731         if (long_pressed)
 732                 ideapad_input_report(priv, 17);
 733         else
 734                 ideapad_input_report(priv, 16);
 735 }
 736
 737 static void ideapad_check_special_buttons(struct ideapad_private *priv)
 738 {
 739         unsigned long bit, value;
 740
 741         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
 742
 743         for (bit = 0; bit < 16; bit++) {
 744                 if (test_bit(bit, &value)) {
 745                         switch (bit) {
 746                         case 0: /* Z580 */
 747                         case 6: /* Z570 */
 748                                 /* Thermal Management button */
 749                                 ideapad_input_report(priv, 65);
 750                                 break;
 751                         case 1:
 752                                 /* OneKey Theater button */
 753                                 ideapad_input_report(priv, 64);
 754                                 break;
 755                         default:
 756                                 pr_info("Unknown special button: %lu\n", bit);
 757                                 break;
 758                         }
 759                 }
 760         }
 761 }
 762
 763 /*
 764  * backlight
 765  */
 766 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 767 {
 768         struct ideapad_private *priv = bl_get_data(blightdev);
 769         unsigned long now;
 770
 771         if (!priv)
 772                 return -EINVAL;
 773
 774         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 775                 return -EIO;
 776         return now;
 777 }
 778
 779 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 780 {
 781         struct ideapad_private *priv = bl_get_data(blightdev);
 782
 783         if (!priv)
 784                 return -EINVAL;
 785
 786         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
 787                          blightdev->props.brightness))
 788                 return -EIO;
 789         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
 790                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 791                 return -EIO;
 792
 793         return 0;
 794 }
 795
 796 static const struct backlight_ops ideapad_backlight_ops = {
 797         .get_brightness = ideapad_backlight_get_brightness,
 798         .update_status = ideapad_backlight_update_status,
 799 };
 800
 801 static int ideapad_backlight_init(struct ideapad_private *priv)
 802 {
 803         struct backlight_device *blightdev;
 804         struct backlight_properties props;
 805         unsigned long max, now, power;
 806
 807         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
 808                 return -EIO;
 809         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 810                 return -EIO;
 811         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 812                 return -EIO;
 813
 814         memset(&props, 0, sizeof(struct backlight_properties));
 815         props.max_brightness = max;
 816         props.type = BACKLIGHT_PLATFORM;
 817         blightdev = backlight_device_register("ideapad",
 818                                               &priv->platform_device->dev,
 819                                               priv,
 820                                               &ideapad_backlight_ops,
 821                                               &props);
 822         if (IS_ERR(blightdev)) {
 823                 pr_err("Could not register backlight device\n");
 824                 return PTR_ERR(blightdev);
 825         }
 826
 827         priv->blightdev = blightdev;
 828         blightdev->props.brightness = now;
 829         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 830         backlight_update_status(blightdev);
 831
 832         return 0;
 833 }
 834
 835 static void ideapad_backlight_exit(struct ideapad_private *priv)
 836 {
 837         backlight_device_unregister(priv->blightdev);
 838         priv->blightdev = NULL;
 839 }
 840
 841 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 842 {
 843         unsigned long power;
 844         struct backlight_device *blightdev = priv->blightdev;
 845
 846         if (!blightdev)
 847                 return;
 848         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 849                 return;
 850         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 851 }
 852
 853 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 854 {
 855         unsigned long now;
 856
 857         /* if we control brightness via acpi video driver */
 858         if (priv->blightdev == NULL) {
 859                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
 860                 return;
 861         }
 862
 863         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 864 }
 865
 866 /*
 867  * module init/exit
 868  */
 869 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 870 {
 871         unsigned long value;
 872
 873         if (!priv->has_touchpad_switch)
 874                 return;
 875
 876         /* Without reading from EC touchpad LED doesn't switch state */
 877         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
 878                 /* Some IdeaPads don't really turn off touchpad - they only
 879                  * switch the LED state. We (de)activate KBC AUX port to turn
 880                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
 881                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
 882                 unsigned char param;
 883                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
 884                               I8042_CMD_AUX_DISABLE);
 885                 ideapad_input_report(priv, value ? 67 : 66);
 886         }
 887 }
 888
 889 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 890 {
 891         struct ideapad_private *priv = data;
 892         unsigned long vpc1, vpc2, vpc_bit;
 893
 894         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 895                 return;
 896         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 897                 return;
 898
 899         vpc1 = (vpc2 << 8) | vpc1;
 900         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 901                 if (test_bit(vpc_bit, &vpc1)) {
 902                         switch (vpc_bit) {
 903                         case 9:
 904                                 ideapad_sync_rfk_state(priv);
 905                                 break;
 906                         case 13:
 907                         case 11:
 908                         case 8:
 909                         case 7:
 910                         case 6:
 911                                 ideapad_input_report(priv, vpc_bit);
 912                                 break;
 913                         case 5:
 914                                 ideapad_sync_touchpad_state(priv);
 915                                 break;
 916                         case 4:
 917                                 ideapad_backlight_notify_brightness(priv);
 918                                 break;
 919                         case 3:
 920                                 ideapad_input_novokey(priv);
 921                                 break;
 922                         case 2:
 923                                 ideapad_backlight_notify_power(priv);
 924                                 break;
 925                         case 0:
 926                                 ideapad_check_special_buttons(priv);
 927                                 break;
 928                         case 1:
 929                                 /* Some IdeaPads report event 1 every ~20
 930                                  * seconds while on battery power; some
 931                                  * report this when changing to/from tablet
 932                                  * mode. Squelch this event.
 933                                  */
 934                                 break;
 935                         default:
 936                                 pr_info("Unknown event: %lu\n", vpc_bit);
 937                         }
 938                 }
 939         }
 940 }
 941
 942 #if IS_ENABLED(CONFIG_ACPI_WMI)
 943 static void ideapad_wmi_notify(u32 value, void *context)
 944 {
 945         switch (value) {
 946         case 128:
 947                 ideapad_input_report(context, value);
 948                 break;
 949         default:
 950                 pr_info("Unknown WMI event %u\n", value);
 951         }
 952 }
 953 #endif
 954
 955 /*
 956  * Some ideapads have a hardware rfkill switch, but most do not have one.
 957  * Reading VPCCMD_R_RF always results in 0 on models without a hardware rfkill,
 958  * switch causing ideapad_laptop to wrongly report all radios as hw-blocked.
 959  * There used to be a long list of DMI ids for models without a hw rfkill
 960  * switch here, but that resulted in playing whack a mole.
 961  * More importantly wrongly reporting the wifi radio as hw-blocked, results in
 962  * non working wifi. Whereas not reporting it hw-blocked, when it actually is
 963  * hw-blocked results in an empty SSID list, which is a much more benign
 964  * failure mode.
 965  * So the default now is the much safer option of assuming there is no
 966  * hardware rfkill switch. This default also actually matches most hardware,
 967  * since having a hw rfkill switch is quite rare on modern hardware, so this
 968  * also leads to a much shorter list.
 969  */
 970 static const struct dmi_system_id hw_rfkill_list[] = {
 971         {}
 972 };
 973
 974 static int ideapad_acpi_add(struct platform_device *pdev)
 975 {
 976         int ret, i;
 977         int cfg;
 978         struct ideapad_private *priv;
 979         struct acpi_device *adev;
 980
 981         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
 982         if (ret)
 983                 return -ENODEV;
 984
 985         if (read_method_int(adev->handle, "_CFG", &cfg))
 986                 return -ENODEV;
 987
 988         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 989         if (!priv)
 990                 return -ENOMEM;
 991
 992         dev_set_drvdata(&pdev->dev, priv);
 993         priv->cfg = cfg;
 994         priv->adev = adev;
 995         priv->platform_device = pdev;
 996         priv->has_hw_rfkill_switch = dmi_check_system(hw_rfkill_list);
 997
 998         /* Most ideapads with ELAN0634 touchpad don't use EC touchpad switch */
 999         priv->has_touchpad_switch = !acpi_dev_present("ELAN0634", NULL, -1);
1000
1001         ret = ideapad_sysfs_init(priv);
1002         if (ret)
1003                 return ret;
1004
1005         ideapad_debugfs_init(priv);
1006
1007         ret = ideapad_input_init(priv);
1008         if (ret)
1009                 goto input_failed;
1010
1011         /*
1012          * On some models without a hw-switch (the yoga 2 13 at least)
1013          * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
1014          */
1015         if (!priv->has_hw_rfkill_switch)
1016                 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
1017
1018         /* The same for Touchpad */
1019         if (!priv->has_touchpad_switch)
1020                 write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, 1);
1021
1022         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1023                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
1024                         ideapad_register_rfkill(priv, i);
1025
1026         ideapad_sync_rfk_state(priv);
1027         ideapad_sync_touchpad_state(priv);
1028
1029         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1030                 ret = ideapad_backlight_init(priv);
1031                 if (ret && ret != -ENODEV)
1032                         goto backlight_failed;
1033         }
1034         ret = acpi_install_notify_handler(adev->handle,
1035                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
1036         if (ret)
1037                 goto notification_failed;
1038
1039 #if IS_ENABLED(CONFIG_ACPI_WMI)
1040         for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
1041                 ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
1042                                                  ideapad_wmi_notify, priv);
1043                 if (ret == AE_OK) {
1044                         priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
1045                         break;
1046                 }
1047         }
1048         if (ret != AE_OK && ret != AE_NOT_EXIST)
1049                 goto notification_failed_wmi;
1050 #endif
1051
1052         return 0;
1053 #if IS_ENABLED(CONFIG_ACPI_WMI)
1054 notification_failed_wmi:
1055         acpi_remove_notify_handler(priv->adev->handle,
1056                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1057 #endif
1058 notification_failed:
1059         ideapad_backlight_exit(priv);
1060 backlight_failed:
1061         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1062                 ideapad_unregister_rfkill(priv, i);
1063         ideapad_input_exit(priv);
1064 input_failed:
1065         ideapad_debugfs_exit(priv);
1066         ideapad_sysfs_exit(priv);
1067         return ret;
1068 }
1069
1070 static int ideapad_acpi_remove(struct platform_device *pdev)
1071 {
1072         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
1073         int i;
1074
1075 #if IS_ENABLED(CONFIG_ACPI_WMI)
1076         if (priv->fnesc_guid)
1077                 wmi_remove_notify_handler(priv->fnesc_guid);
1078 #endif
1079         acpi_remove_notify_handler(priv->adev->handle,
1080                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1081         ideapad_backlight_exit(priv);
1082         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1083                 ideapad_unregister_rfkill(priv, i);
1084         ideapad_input_exit(priv);
1085         ideapad_debugfs_exit(priv);
1086         ideapad_sysfs_exit(priv);
1087         dev_set_drvdata(&pdev->dev, NULL);
1088
1089         return 0;
1090 }
1091
1092 #ifdef CONFIG_PM_SLEEP
1093 static int ideapad_acpi_resume(struct device *device)
1094 {
1095         struct ideapad_private *priv;
1096
1097         if (!device)
1098                 return -EINVAL;
1099         priv = dev_get_drvdata(device);
1100
1101         ideapad_sync_rfk_state(priv);
1102         ideapad_sync_touchpad_state(priv);
1103         return 0;
1104 }
1105 #endif
1106 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
1107
1108 static const struct acpi_device_id ideapad_device_ids[] = {
1109         { "VPC2004", 0},
1110         { "", 0},
1111 };
1112 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
1113
1114 static struct platform_driver ideapad_acpi_driver = {
1115         .probe = ideapad_acpi_add,
1116         .remove = ideapad_acpi_remove,
1117         .driver = {
1118                 .name   = "ideapad_acpi",
1119                 .pm     = &ideapad_pm,
1120                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
1121         },
1122 };
1123
1124 module_platform_driver(ideapad_acpi_driver);
1125
1126 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1127 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1128 MODULE_LICENSE("GPL");