drivers/platform/x86/ideapad-laptop.c

   1 /*
   2  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
   3  *
   4  *  Copyright © 2010 Intel Corporation
   5  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  *  02110-1301, USA.
  21  */
  22
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/acpi.h>
  30 #include <linux/rfkill.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/input.h>
  33 #include <linux/input/sparse-keymap.h>
  34 #include <linux/backlight.h>
  35 #include <linux/fb.h>
  36 #include <linux/debugfs.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/i8042.h>
  39 #include <linux/dmi.h>
  40 #include <linux/device.h>
  41 #include <acpi/video.h>
  42
  43 #define IDEAPAD_RFKILL_DEV_NUM  (3)
  44
  45 #define CFG_BT_BIT      (16)
  46 #define CFG_3G_BIT      (17)
  47 #define CFG_WIFI_BIT    (18)
  48 #define CFG_CAMERA_BIT  (19)
  49
  50 #if IS_ENABLED(CONFIG_ACPI_WMI)
  51 static const char *const ideapad_wmi_fnesc_events[] = {
  52         "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
  53         "56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
  54 };
  55 #endif
  56
  57 enum {
  58         VPCCMD_R_VPC1 = 0x10,
  59         VPCCMD_R_BL_MAX,
  60         VPCCMD_R_BL,
  61         VPCCMD_W_BL,
  62         VPCCMD_R_WIFI,
  63         VPCCMD_W_WIFI,
  64         VPCCMD_R_BT,
  65         VPCCMD_W_BT,
  66         VPCCMD_R_BL_POWER,
  67         VPCCMD_R_NOVO,
  68         VPCCMD_R_VPC2,
  69         VPCCMD_R_TOUCHPAD,
  70         VPCCMD_W_TOUCHPAD,
  71         VPCCMD_R_CAMERA,
  72         VPCCMD_W_CAMERA,
  73         VPCCMD_R_3G,
  74         VPCCMD_W_3G,
  75         VPCCMD_R_ODD, /* 0x21 */
  76         VPCCMD_W_FAN,
  77         VPCCMD_R_RF,
  78         VPCCMD_W_RF,
  79         VPCCMD_R_FAN = 0x2B,
  80         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
  81         VPCCMD_W_BL_POWER = 0x33,
  82 };
  83
  84 struct ideapad_rfk_priv {
  85         int dev;
  86         struct ideapad_private *priv;
  87 };
  88
  89 struct ideapad_private {
  90         struct acpi_device *adev;
  91         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
  92         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
  93         struct platform_device *platform_device;
  94         struct input_dev *inputdev;
  95         struct backlight_device *blightdev;
  96         struct dentry *debug;
  97         unsigned long cfg;
  98         bool has_hw_rfkill_switch;
  99         const char *fnesc_guid;
 100 };
 101
 102 static bool no_bt_rfkill;
 103 module_param(no_bt_rfkill, bool, 0444);
 104 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 105
 106 /*
 107  * ACPI Helpers
 108  */
 109 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
 110
 111 static int read_method_int(acpi_handle handle, const char *method, int *val)
 112 {
 113         acpi_status status;
 114         unsigned long long result;
 115
 116         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 117         if (ACPI_FAILURE(status)) {
 118                 *val = -1;
 119                 return -1;
 120         } else {
 121                 *val = result;
 122                 return 0;
 123         }
 124 }
 125
 126 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
 127 {
 128         acpi_status status;
 129         unsigned long long result;
 130         struct acpi_object_list params;
 131         union acpi_object in_obj;
 132
 133         params.count = 1;
 134         params.pointer = &in_obj;
 135         in_obj.type = ACPI_TYPE_INTEGER;
 136         in_obj.integer.value = cmd;
 137
 138         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
 139
 140         if (ACPI_FAILURE(status)) {
 141                 *ret = -1;
 142                 return -1;
 143         } else {
 144                 *ret = result;
 145                 return 0;
 146         }
 147 }
 148
 149 static int method_vpcw(acpi_handle handle, int cmd, int data)
 150 {
 151         struct acpi_object_list params;
 152         union acpi_object in_obj[2];
 153         acpi_status status;
 154
 155         params.count = 2;
 156         params.pointer = in_obj;
 157         in_obj[0].type = ACPI_TYPE_INTEGER;
 158         in_obj[0].integer.value = cmd;
 159         in_obj[1].type = ACPI_TYPE_INTEGER;
 160         in_obj[1].integer.value = data;
 161
 162         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 163         if (status != AE_OK)
 164                 return -1;
 165         return 0;
 166 }
 167
 168 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 169 {
 170         int val;
 171         unsigned long int end_jiffies;
 172
 173         if (method_vpcw(handle, 1, cmd))
 174                 return -1;
 175
 176         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 177              time_before(jiffies, end_jiffies);) {
 178                 schedule();
 179                 if (method_vpcr(handle, 1, &val))
 180                         return -1;
 181                 if (val == 0) {
 182                         if (method_vpcr(handle, 0, &val))
 183                                 return -1;
 184                         *data = val;
 185                         return 0;
 186                 }
 187         }
 188         pr_err("timeout in read_ec_cmd\n");
 189         return -1;
 190 }
 191
 192 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 193 {
 194         int val;
 195         unsigned long int end_jiffies;
 196
 197         if (method_vpcw(handle, 0, data))
 198                 return -1;
 199         if (method_vpcw(handle, 1, cmd))
 200                 return -1;
 201
 202         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 203              time_before(jiffies, end_jiffies);) {
 204                 schedule();
 205                 if (method_vpcr(handle, 1, &val))
 206                         return -1;
 207                 if (val == 0)
 208                         return 0;
 209         }
 210         pr_err("timeout in write_ec_cmd\n");
 211         return -1;
 212 }
 213
 214 /*
 215  * debugfs
 216  */
 217 static int debugfs_status_show(struct seq_file *s, void *data)
 218 {
 219         struct ideapad_private *priv = s->private;
 220         unsigned long value;
 221
 222         if (!priv)
 223                 return -EINVAL;
 224
 225         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
 226                 seq_printf(s, "Backlight max:\t%lu\n", value);
 227         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
 228                 seq_printf(s, "Backlight now:\t%lu\n", value);
 229         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
 230                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
 231         seq_printf(s, "=====================\n");
 232
 233         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
 234                 seq_printf(s, "Radio status:\t%s(%lu)\n",
 235                            value ? "On" : "Off", value);
 236         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
 237                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
 238                            value ? "On" : "Off", value);
 239         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
 240                 seq_printf(s, "BT status:\t%s(%lu)\n",
 241                            value ? "On" : "Off", value);
 242         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
 243                 seq_printf(s, "3G status:\t%s(%lu)\n",
 244                            value ? "On" : "Off", value);
 245         seq_printf(s, "=====================\n");
 246
 247         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
 248                 seq_printf(s, "Touchpad status:%s(%lu)\n",
 249                            value ? "On" : "Off", value);
 250         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
 251                 seq_printf(s, "Camera status:\t%s(%lu)\n",
 252                            value ? "On" : "Off", value);
 253
 254         return 0;
 255 }
 256
 257 static int debugfs_status_open(struct inode *inode, struct file *file)
 258 {
 259         return single_open(file, debugfs_status_show, inode->i_private);
 260 }
 261
 262 static const struct file_operations debugfs_status_fops = {
 263         .owner = THIS_MODULE,
 264         .open = debugfs_status_open,
 265         .read = seq_read,
 266         .llseek = seq_lseek,
 267         .release = single_release,
 268 };
 269
 270 static int debugfs_cfg_show(struct seq_file *s, void *data)
 271 {
 272         struct ideapad_private *priv = s->private;
 273
 274         if (!priv) {
 275                 seq_printf(s, "cfg: N/A\n");
 276         } else {
 277                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
 278                            priv->cfg);
 279                 if (test_bit(CFG_BT_BIT, &priv->cfg))
 280                         seq_printf(s, "Bluetooth ");
 281                 if (test_bit(CFG_3G_BIT, &priv->cfg))
 282                         seq_printf(s, "3G ");
 283                 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
 284                         seq_printf(s, "Wireless ");
 285                 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
 286                         seq_printf(s, "Camera ");
 287                 seq_printf(s, "\nGraphic: ");
 288                 switch ((priv->cfg)&0x700) {
 289                 case 0x100:
 290                         seq_printf(s, "Intel");
 291                         break;
 292                 case 0x200:
 293                         seq_printf(s, "ATI");
 294                         break;
 295                 case 0x300:
 296                         seq_printf(s, "Nvidia");
 297                         break;
 298                 case 0x400:
 299                         seq_printf(s, "Intel and ATI");
 300                         break;
 301                 case 0x500:
 302                         seq_printf(s, "Intel and Nvidia");
 303                         break;
 304                 }
 305                 seq_printf(s, "\n");
 306         }
 307         return 0;
 308 }
 309
 310 static int debugfs_cfg_open(struct inode *inode, struct file *file)
 311 {
 312         return single_open(file, debugfs_cfg_show, inode->i_private);
 313 }
 314
 315 static const struct file_operations debugfs_cfg_fops = {
 316         .owner = THIS_MODULE,
 317         .open = debugfs_cfg_open,
 318         .read = seq_read,
 319         .llseek = seq_lseek,
 320         .release = single_release,
 321 };
 322
 323 static int ideapad_debugfs_init(struct ideapad_private *priv)
 324 {
 325         struct dentry *node;
 326
 327         priv->debug = debugfs_create_dir("ideapad", NULL);
 328         if (priv->debug == NULL) {
 329                 pr_err("failed to create debugfs directory");
 330                 goto errout;
 331         }
 332
 333         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
 334                                    &debugfs_cfg_fops);
 335         if (!node) {
 336                 pr_err("failed to create cfg in debugfs");
 337                 goto errout;
 338         }
 339
 340         node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
 341                                    &debugfs_status_fops);
 342         if (!node) {
 343                 pr_err("failed to create status in debugfs");
 344                 goto errout;
 345         }
 346
 347         return 0;
 348
 349 errout:
 350         return -ENOMEM;
 351 }
 352
 353 static void ideapad_debugfs_exit(struct ideapad_private *priv)
 354 {
 355         debugfs_remove_recursive(priv->debug);
 356         priv->debug = NULL;
 357 }
 358
 359 /*
 360  * sysfs
 361  */
 362 static ssize_t show_ideapad_cam(struct device *dev,
 363                                 struct device_attribute *attr,
 364                                 char *buf)
 365 {
 366         unsigned long result;
 367         struct ideapad_private *priv = dev_get_drvdata(dev);
 368
 369         if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
 370                 return sprintf(buf, "-1\n");
 371         return sprintf(buf, "%lu\n", result);
 372 }
 373
 374 static ssize_t store_ideapad_cam(struct device *dev,
 375                                  struct device_attribute *attr,
 376                                  const char *buf, size_t count)
 377 {
 378         int ret, state;
 379         struct ideapad_private *priv = dev_get_drvdata(dev);
 380
 381         if (!count)
 382                 return 0;
 383         if (sscanf(buf, "%i", &state) != 1)
 384                 return -EINVAL;
 385         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
 386         if (ret < 0)
 387                 return -EIO;
 388         return count;
 389 }
 390
 391 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 392
 393 static ssize_t show_ideapad_fan(struct device *dev,
 394                                 struct device_attribute *attr,
 395                                 char *buf)
 396 {
 397         unsigned long result;
 398         struct ideapad_private *priv = dev_get_drvdata(dev);
 399
 400         if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
 401                 return sprintf(buf, "-1\n");
 402         return sprintf(buf, "%lu\n", result);
 403 }
 404
 405 static ssize_t store_ideapad_fan(struct device *dev,
 406                                  struct device_attribute *attr,
 407                                  const char *buf, size_t count)
 408 {
 409         int ret, state;
 410         struct ideapad_private *priv = dev_get_drvdata(dev);
 411
 412         if (!count)
 413                 return 0;
 414         if (sscanf(buf, "%i", &state) != 1)
 415                 return -EINVAL;
 416         if (state < 0 || state > 4 || state == 3)
 417                 return -EINVAL;
 418         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
 419         if (ret < 0)
 420                 return -EIO;
 421         return count;
 422 }
 423
 424 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
 425
 426 static ssize_t touchpad_show(struct device *dev,
 427                              struct device_attribute *attr,
 428                              char *buf)
 429 {
 430         struct ideapad_private *priv = dev_get_drvdata(dev);
 431         unsigned long result;
 432
 433         if (read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result))
 434                 return sprintf(buf, "-1\n");
 435         return sprintf(buf, "%lu\n", result);
 436 }
 437
 438 /* Switch to RO for now: It might be revisited in the future */
 439 static ssize_t __maybe_unused touchpad_store(struct device *dev,
 440                                              struct device_attribute *attr,
 441                                              const char *buf, size_t count)
 442 {
 443         struct ideapad_private *priv = dev_get_drvdata(dev);
 444         bool state;
 445         int ret;
 446
 447         ret = kstrtobool(buf, &state);
 448         if (ret)
 449                 return ret;
 450
 451         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
 452         if (ret < 0)
 453                 return -EIO;
 454         return count;
 455 }
 456
 457 static DEVICE_ATTR_RO(touchpad);
 458
 459 static struct attribute *ideapad_attributes[] = {
 460         &dev_attr_camera_power.attr,
 461         &dev_attr_fan_mode.attr,
 462         &dev_attr_touchpad.attr,
 463         NULL
 464 };
 465
 466 static umode_t ideapad_is_visible(struct kobject *kobj,
 467                                  struct attribute *attr,
 468                                  int idx)
 469 {
 470         struct device *dev = container_of(kobj, struct device, kobj);
 471         struct ideapad_private *priv = dev_get_drvdata(dev);
 472         bool supported;
 473
 474         if (attr == &dev_attr_camera_power.attr)
 475                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
 476         else if (attr == &dev_attr_fan_mode.attr) {
 477                 unsigned long value;
 478                 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
 479                                           &value);
 480         } else
 481                 supported = true;
 482
 483         return supported ? attr->mode : 0;
 484 }
 485
 486 static const struct attribute_group ideapad_attribute_group = {
 487         .is_visible = ideapad_is_visible,
 488         .attrs = ideapad_attributes
 489 };
 490
 491 /*
 492  * Rfkill
 493  */
 494 struct ideapad_rfk_data {
 495         char *name;
 496         int cfgbit;
 497         int opcode;
 498         int type;
 499 };
 500
 501 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
 502         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
 503         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
 504         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
 505 };
 506
 507 static int ideapad_rfk_set(void *data, bool blocked)
 508 {
 509         struct ideapad_rfk_priv *priv = data;
 510         int opcode = ideapad_rfk_data[priv->dev].opcode;
 511
 512         return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
 513 }
 514
 515 static const struct rfkill_ops ideapad_rfk_ops = {
 516         .set_block = ideapad_rfk_set,
 517 };
 518
 519 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 520 {
 521         unsigned long hw_blocked = 0;
 522         int i;
 523
 524         if (priv->has_hw_rfkill_switch) {
 525                 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
 526                         return;
 527                 hw_blocked = !hw_blocked;
 528         }
 529
 530         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 531                 if (priv->rfk[i])
 532                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 533 }
 534
 535 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
 536 {
 537         int ret;
 538         unsigned long sw_blocked;
 539
 540         if (no_bt_rfkill &&
 541             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 542                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 543                 write_ec_cmd(priv->adev->handle,
 544                              ideapad_rfk_data[dev].opcode, 1);
 545                 return 0;
 546         }
 547         priv->rfk_priv[dev].dev = dev;
 548         priv->rfk_priv[dev].priv = priv;
 549
 550         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
 551                                       &priv->platform_device->dev,
 552                                       ideapad_rfk_data[dev].type,
 553                                       &ideapad_rfk_ops,
 554                                       &priv->rfk_priv[dev]);
 555         if (!priv->rfk[dev])
 556                 return -ENOMEM;
 557
 558         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
 559                          &sw_blocked)) {
 560                 rfkill_init_sw_state(priv->rfk[dev], 0);
 561         } else {
 562                 sw_blocked = !sw_blocked;
 563                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 564         }
 565
 566         ret = rfkill_register(priv->rfk[dev]);
 567         if (ret) {
 568                 rfkill_destroy(priv->rfk[dev]);
 569                 return ret;
 570         }
 571         return 0;
 572 }
 573
 574 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
 575 {
 576         if (!priv->rfk[dev])
 577                 return;
 578
 579         rfkill_unregister(priv->rfk[dev]);
 580         rfkill_destroy(priv->rfk[dev]);
 581 }
 582
 583 /*
 584  * Platform device
 585  */
 586 static int ideapad_sysfs_init(struct ideapad_private *priv)
 587 {
 588         return sysfs_create_group(&priv->platform_device->dev.kobj,
 589                                     &ideapad_attribute_group);
 590 }
 591
 592 static void ideapad_sysfs_exit(struct ideapad_private *priv)
 593 {
 594         sysfs_remove_group(&priv->platform_device->dev.kobj,
 595                            &ideapad_attribute_group);
 596 }
 597
 598 /*
 599  * input device
 600  */
 601 static const struct key_entry ideapad_keymap[] = {
 602         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
 603         { KE_KEY, 7,  { KEY_CAMERA } },
 604         { KE_KEY, 8,  { KEY_MICMUTE } },
 605         { KE_KEY, 11, { KEY_F16 } },
 606         { KE_KEY, 13, { KEY_WLAN } },
 607         { KE_KEY, 16, { KEY_PROG1 } },
 608         { KE_KEY, 17, { KEY_PROG2 } },
 609         { KE_KEY, 64, { KEY_PROG3 } },
 610         { KE_KEY, 65, { KEY_PROG4 } },
 611         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
 612         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
 613         { KE_KEY, 128, { KEY_ESC } },
 614
 615         { KE_END, 0 },
 616 };
 617
 618 static int ideapad_input_init(struct ideapad_private *priv)
 619 {
 620         struct input_dev *inputdev;
 621         int error;
 622
 623         inputdev = input_allocate_device();
 624         if (!inputdev)
 625                 return -ENOMEM;
 626
 627         inputdev->name = "Ideapad extra buttons";
 628         inputdev->phys = "ideapad/input0";
 629         inputdev->id.bustype = BUS_HOST;
 630         inputdev->dev.parent = &priv->platform_device->dev;
 631
 632         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 633         if (error) {
 634                 pr_err("Unable to setup input device keymap\n");
 635                 goto err_free_dev;
 636         }
 637
 638         error = input_register_device(inputdev);
 639         if (error) {
 640                 pr_err("Unable to register input device\n");
 641                 goto err_free_dev;
 642         }
 643
 644         priv->inputdev = inputdev;
 645         return 0;
 646
 647 err_free_dev:
 648         input_free_device(inputdev);
 649         return error;
 650 }
 651
 652 static void ideapad_input_exit(struct ideapad_private *priv)
 653 {
 654         input_unregister_device(priv->inputdev);
 655         priv->inputdev = NULL;
 656 }
 657
 658 static void ideapad_input_report(struct ideapad_private *priv,
 659                                  unsigned long scancode)
 660 {
 661         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 662 }
 663
 664 static void ideapad_input_novokey(struct ideapad_private *priv)
 665 {
 666         unsigned long long_pressed;
 667
 668         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
 669                 return;
 670         if (long_pressed)
 671                 ideapad_input_report(priv, 17);
 672         else
 673                 ideapad_input_report(priv, 16);
 674 }
 675
 676 static void ideapad_check_special_buttons(struct ideapad_private *priv)
 677 {
 678         unsigned long bit, value;
 679
 680         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
 681
 682         for (bit = 0; bit < 16; bit++) {
 683                 if (test_bit(bit, &value)) {
 684                         switch (bit) {
 685                         case 0: /* Z580 */
 686                         case 6: /* Z570 */
 687                                 /* Thermal Management button */
 688                                 ideapad_input_report(priv, 65);
 689                                 break;
 690                         case 1:
 691                                 /* OneKey Theater button */
 692                                 ideapad_input_report(priv, 64);
 693                                 break;
 694                         default:
 695                                 pr_info("Unknown special button: %lu\n", bit);
 696                                 break;
 697                         }
 698                 }
 699         }
 700 }
 701
 702 /*
 703  * backlight
 704  */
 705 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 706 {
 707         struct ideapad_private *priv = bl_get_data(blightdev);
 708         unsigned long now;
 709
 710         if (!priv)
 711                 return -EINVAL;
 712
 713         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 714                 return -EIO;
 715         return now;
 716 }
 717
 718 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 719 {
 720         struct ideapad_private *priv = bl_get_data(blightdev);
 721
 722         if (!priv)
 723                 return -EINVAL;
 724
 725         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
 726                          blightdev->props.brightness))
 727                 return -EIO;
 728         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
 729                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 730                 return -EIO;
 731
 732         return 0;
 733 }
 734
 735 static const struct backlight_ops ideapad_backlight_ops = {
 736         .get_brightness = ideapad_backlight_get_brightness,
 737         .update_status = ideapad_backlight_update_status,
 738 };
 739
 740 static int ideapad_backlight_init(struct ideapad_private *priv)
 741 {
 742         struct backlight_device *blightdev;
 743         struct backlight_properties props;
 744         unsigned long max, now, power;
 745
 746         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
 747                 return -EIO;
 748         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 749                 return -EIO;
 750         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 751                 return -EIO;
 752
 753         memset(&props, 0, sizeof(struct backlight_properties));
 754         props.max_brightness = max;
 755         props.type = BACKLIGHT_PLATFORM;
 756         blightdev = backlight_device_register("ideapad",
 757                                               &priv->platform_device->dev,
 758                                               priv,
 759                                               &ideapad_backlight_ops,
 760                                               &props);
 761         if (IS_ERR(blightdev)) {
 762                 pr_err("Could not register backlight device\n");
 763                 return PTR_ERR(blightdev);
 764         }
 765
 766         priv->blightdev = blightdev;
 767         blightdev->props.brightness = now;
 768         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 769         backlight_update_status(blightdev);
 770
 771         return 0;
 772 }
 773
 774 static void ideapad_backlight_exit(struct ideapad_private *priv)
 775 {
 776         backlight_device_unregister(priv->blightdev);
 777         priv->blightdev = NULL;
 778 }
 779
 780 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 781 {
 782         unsigned long power;
 783         struct backlight_device *blightdev = priv->blightdev;
 784
 785         if (!blightdev)
 786                 return;
 787         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 788                 return;
 789         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 790 }
 791
 792 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 793 {
 794         unsigned long now;
 795
 796         /* if we control brightness via acpi video driver */
 797         if (priv->blightdev == NULL) {
 798                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
 799                 return;
 800         }
 801
 802         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 803 }
 804
 805 /*
 806  * module init/exit
 807  */
 808 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 809 {
 810         unsigned long value;
 811
 812         /* Without reading from EC touchpad LED doesn't switch state */
 813         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
 814                 /* Some IdeaPads don't really turn off touchpad - they only
 815                  * switch the LED state. We (de)activate KBC AUX port to turn
 816                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
 817                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
 818                 unsigned char param;
 819                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
 820                               I8042_CMD_AUX_DISABLE);
 821                 ideapad_input_report(priv, value ? 67 : 66);
 822         }
 823 }
 824
 825 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 826 {
 827         struct ideapad_private *priv = data;
 828         unsigned long vpc1, vpc2, vpc_bit;
 829
 830         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 831                 return;
 832         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 833                 return;
 834
 835         vpc1 = (vpc2 << 8) | vpc1;
 836         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 837                 if (test_bit(vpc_bit, &vpc1)) {
 838                         switch (vpc_bit) {
 839                         case 9:
 840                                 ideapad_sync_rfk_state(priv);
 841                                 break;
 842                         case 13:
 843                         case 11:
 844                         case 8:
 845                         case 7:
 846                         case 6:
 847                                 ideapad_input_report(priv, vpc_bit);
 848                                 break;
 849                         case 5:
 850                                 ideapad_sync_touchpad_state(priv);
 851                                 break;
 852                         case 4:
 853                                 ideapad_backlight_notify_brightness(priv);
 854                                 break;
 855                         case 3:
 856                                 ideapad_input_novokey(priv);
 857                                 break;
 858                         case 2:
 859                                 ideapad_backlight_notify_power(priv);
 860                                 break;
 861                         case 0:
 862                                 ideapad_check_special_buttons(priv);
 863                                 break;
 864                         case 1:
 865                                 /* Some IdeaPads report event 1 every ~20
 866                                  * seconds while on battery power; some
 867                                  * report this when changing to/from tablet
 868                                  * mode. Squelch this event.
 869                                  */
 870                                 break;
 871                         default:
 872                                 pr_info("Unknown event: %lu\n", vpc_bit);
 873                         }
 874                 }
 875         }
 876 }
 877
 878 #if IS_ENABLED(CONFIG_ACPI_WMI)
 879 static void ideapad_wmi_notify(u32 value, void *context)
 880 {
 881         switch (value) {
 882         case 128:
 883                 ideapad_input_report(context, value);
 884                 break;
 885         default:
 886                 pr_info("Unknown WMI event %u\n", value);
 887         }
 888 }
 889 #endif
 890
 891 /*
 892  * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
 893  * always results in 0 on these models, causing ideapad_laptop to wrongly
 894  * report all radios as hardware-blocked.
 895  */
 896 static const struct dmi_system_id no_hw_rfkill_list[] = {
 897         {
 898                 .ident = "Lenovo G40-30",
 899                 .matches = {
 900                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 901                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
 902                 },
 903         },
 904         {
 905                 .ident = "Lenovo G50-30",
 906                 .matches = {
 907                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 908                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
 909                 },
 910         },
 911         {
 912                 .ident = "Lenovo V310-15ISK",
 913                 .matches = {
 914                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 915                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-15ISK"),
 916                 },
 917         },
 918         {
 919                 .ident = "Lenovo ideapad 310-15IKB",
 920                 .matches = {
 921                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 922                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15IKB"),
 923                 },
 924         },
 925         {
 926                 .ident = "Lenovo ideapad Y700-15ACZ",
 927                 .matches = {
 928                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 929                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ACZ"),
 930                 },
 931         },
 932         {
 933                 .ident = "Lenovo ideapad Y700-15ISK",
 934                 .matches = {
 935                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 936                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"),
 937                 },
 938         },
 939         {
 940                 .ident = "Lenovo ideapad Y700 Touch-15ISK",
 941                 .matches = {
 942                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 943                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"),
 944                 },
 945         },
 946         {
 947                 .ident = "Lenovo ideapad Y700-17ISK",
 948                 .matches = {
 949                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 950                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"),
 951                 },
 952         },
 953         {
 954                 .ident = "Lenovo Legion Y520-15IKBN",
 955                 .matches = {
 956                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 957                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKBN"),
 958                 },
 959         },
 960         {
 961                 .ident = "Lenovo Legion Y720-15IKBN",
 962                 .matches = {
 963                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 964                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKBN"),
 965                 },
 966         },
 967         {
 968                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
 969                 .matches = {
 970                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 971                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
 972                 },
 973         },
 974         {
 975                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
 976                 .matches = {
 977                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 978                         DMI_MATCH(DMI_BOARD_NAME, "Yoga2"),
 979                 },
 980         },
 981         {
 982                 .ident = "Lenovo Yoga 3 1170 / 1470",
 983                 .matches = {
 984                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 985                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3"),
 986                 },
 987         },
 988         {
 989                 .ident = "Lenovo Yoga 3 Pro 1370",
 990                 .matches = {
 991                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 992                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
 993                 },
 994         },
 995         {
 996                 .ident = "Lenovo Yoga 700",
 997                 .matches = {
 998                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 999                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"),
1000                 },
1001         },
1002         {
1003                 .ident = "Lenovo Yoga 900",
1004                 .matches = {
1005                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1006                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"),
1007                 },
1008         },
1009         {
1010                 .ident = "Lenovo Yoga 900",
1011                 .matches = {
1012                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1013                         DMI_MATCH(DMI_BOARD_NAME, "VIUU4"),
1014                 },
1015         },
1016         {
1017                 .ident = "Lenovo YOGA 910-13IKB",
1018                 .matches = {
1019                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1020                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 910-13IKB"),
1021                 },
1022         },
1023         {}
1024 };
1025
1026 static int ideapad_acpi_add(struct platform_device *pdev)
1027 {
1028         int ret, i;
1029         int cfg;
1030         struct ideapad_private *priv;
1031         struct acpi_device *adev;
1032
1033         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
1034         if (ret)
1035                 return -ENODEV;
1036
1037         if (read_method_int(adev->handle, "_CFG", &cfg))
1038                 return -ENODEV;
1039
1040         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1041         if (!priv)
1042                 return -ENOMEM;
1043
1044         dev_set_drvdata(&pdev->dev, priv);
1045         priv->cfg = cfg;
1046         priv->adev = adev;
1047         priv->platform_device = pdev;
1048         priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
1049
1050         ret = ideapad_sysfs_init(priv);
1051         if (ret)
1052                 return ret;
1053
1054         ret = ideapad_debugfs_init(priv);
1055         if (ret)
1056                 goto debugfs_failed;
1057
1058         ret = ideapad_input_init(priv);
1059         if (ret)
1060                 goto input_failed;
1061
1062         /*
1063          * On some models without a hw-switch (the yoga 2 13 at least)
1064          * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
1065          */
1066         if (!priv->has_hw_rfkill_switch)
1067                 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
1068
1069         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1070                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
1071                         ideapad_register_rfkill(priv, i);
1072
1073         ideapad_sync_rfk_state(priv);
1074         ideapad_sync_touchpad_state(priv);
1075
1076         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1077                 ret = ideapad_backlight_init(priv);
1078                 if (ret && ret != -ENODEV)
1079                         goto backlight_failed;
1080         }
1081         ret = acpi_install_notify_handler(adev->handle,
1082                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
1083         if (ret)
1084                 goto notification_failed;
1085
1086 #if IS_ENABLED(CONFIG_ACPI_WMI)
1087         for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
1088                 ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
1089                                                  ideapad_wmi_notify, priv);
1090                 if (ret == AE_OK) {
1091                         priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
1092                         break;
1093                 }
1094         }
1095         if (ret != AE_OK && ret != AE_NOT_EXIST)
1096                 goto notification_failed_wmi;
1097 #endif
1098
1099         return 0;
1100 #if IS_ENABLED(CONFIG_ACPI_WMI)
1101 notification_failed_wmi:
1102         acpi_remove_notify_handler(priv->adev->handle,
1103                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1104 #endif
1105 notification_failed:
1106         ideapad_backlight_exit(priv);
1107 backlight_failed:
1108         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1109                 ideapad_unregister_rfkill(priv, i);
1110         ideapad_input_exit(priv);
1111 input_failed:
1112         ideapad_debugfs_exit(priv);
1113 debugfs_failed:
1114         ideapad_sysfs_exit(priv);
1115         return ret;
1116 }
1117
1118 static int ideapad_acpi_remove(struct platform_device *pdev)
1119 {
1120         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
1121         int i;
1122
1123 #if IS_ENABLED(CONFIG_ACPI_WMI)
1124         if (priv->fnesc_guid)
1125                 wmi_remove_notify_handler(priv->fnesc_guid);
1126 #endif
1127         acpi_remove_notify_handler(priv->adev->handle,
1128                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1129         ideapad_backlight_exit(priv);
1130         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1131                 ideapad_unregister_rfkill(priv, i);
1132         ideapad_input_exit(priv);
1133         ideapad_debugfs_exit(priv);
1134         ideapad_sysfs_exit(priv);
1135         dev_set_drvdata(&pdev->dev, NULL);
1136
1137         return 0;
1138 }
1139
1140 #ifdef CONFIG_PM_SLEEP
1141 static int ideapad_acpi_resume(struct device *device)
1142 {
1143         struct ideapad_private *priv;
1144
1145         if (!device)
1146                 return -EINVAL;
1147         priv = dev_get_drvdata(device);
1148
1149         ideapad_sync_rfk_state(priv);
1150         ideapad_sync_touchpad_state(priv);
1151         return 0;
1152 }
1153 #endif
1154 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
1155
1156 static const struct acpi_device_id ideapad_device_ids[] = {
1157         { "VPC2004", 0},
1158         { "", 0},
1159 };
1160 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
1161
1162 static struct platform_driver ideapad_acpi_driver = {
1163         .probe = ideapad_acpi_add,
1164         .remove = ideapad_acpi_remove,
1165         .driver = {
1166                 .name   = "ideapad_acpi",
1167                 .pm     = &ideapad_pm,
1168                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
1169         },
1170 };
1171
1172 module_platform_driver(ideapad_acpi_driver);
1173
1174 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1175 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1176 MODULE_LICENSE("GPL");