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