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         int opcode = ideapad_rfk_data[priv->dev].opcode;
 469
 470         return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
 471 }
 472
 473 static struct rfkill_ops ideapad_rfk_ops = {
 474         .set_block = ideapad_rfk_set,
 475 };
 476
 477 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 478 {
 479         unsigned long hw_blocked = 0;
 480         int i;
 481
 482         if (priv->has_hw_rfkill_switch) {
 483                 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
 484                         return;
 485                 hw_blocked = !hw_blocked;
 486         }
 487
 488         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 489                 if (priv->rfk[i])
 490                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 491 }
 492
 493 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
 494 {
 495         int ret;
 496         unsigned long sw_blocked;
 497
 498         if (no_bt_rfkill &&
 499             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 500                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 501                 write_ec_cmd(priv->adev->handle,
 502                              ideapad_rfk_data[dev].opcode, 1);
 503                 return 0;
 504         }
 505         priv->rfk_priv[dev].dev = dev;
 506         priv->rfk_priv[dev].priv = priv;
 507
 508         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
 509                                       &priv->platform_device->dev,
 510                                       ideapad_rfk_data[dev].type,
 511                                       &ideapad_rfk_ops,
 512                                       &priv->rfk_priv[dev]);
 513         if (!priv->rfk[dev])
 514                 return -ENOMEM;
 515
 516         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
 517                          &sw_blocked)) {
 518                 rfkill_init_sw_state(priv->rfk[dev], 0);
 519         } else {
 520                 sw_blocked = !sw_blocked;
 521                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 522         }
 523
 524         ret = rfkill_register(priv->rfk[dev]);
 525         if (ret) {
 526                 rfkill_destroy(priv->rfk[dev]);
 527                 return ret;
 528         }
 529         return 0;
 530 }
 531
 532 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
 533 {
 534         if (!priv->rfk[dev])
 535                 return;
 536
 537         rfkill_unregister(priv->rfk[dev]);
 538         rfkill_destroy(priv->rfk[dev]);
 539 }
 540
 541 /*
 542  * Platform device
 543  */
 544 static int ideapad_sysfs_init(struct ideapad_private *priv)
 545 {
 546         return sysfs_create_group(&priv->platform_device->dev.kobj,
 547                                     &ideapad_attribute_group);
 548 }
 549
 550 static void ideapad_sysfs_exit(struct ideapad_private *priv)
 551 {
 552         sysfs_remove_group(&priv->platform_device->dev.kobj,
 553                            &ideapad_attribute_group);
 554 }
 555
 556 /*
 557  * input device
 558  */
 559 static const struct key_entry ideapad_keymap[] = {
 560         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
 561         { KE_KEY, 7,  { KEY_CAMERA } },
 562         { KE_KEY, 11, { KEY_F16 } },
 563         { KE_KEY, 13, { KEY_WLAN } },
 564         { KE_KEY, 16, { KEY_PROG1 } },
 565         { KE_KEY, 17, { KEY_PROG2 } },
 566         { KE_KEY, 64, { KEY_PROG3 } },
 567         { KE_KEY, 65, { KEY_PROG4 } },
 568         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
 569         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
 570         { KE_END, 0 },
 571 };
 572
 573 static int ideapad_input_init(struct ideapad_private *priv)
 574 {
 575         struct input_dev *inputdev;
 576         int error;
 577
 578         inputdev = input_allocate_device();
 579         if (!inputdev)
 580                 return -ENOMEM;
 581
 582         inputdev->name = "Ideapad extra buttons";
 583         inputdev->phys = "ideapad/input0";
 584         inputdev->id.bustype = BUS_HOST;
 585         inputdev->dev.parent = &priv->platform_device->dev;
 586
 587         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 588         if (error) {
 589                 pr_err("Unable to setup input device keymap\n");
 590                 goto err_free_dev;
 591         }
 592
 593         error = input_register_device(inputdev);
 594         if (error) {
 595                 pr_err("Unable to register input device\n");
 596                 goto err_free_keymap;
 597         }
 598
 599         priv->inputdev = inputdev;
 600         return 0;
 601
 602 err_free_keymap:
 603         sparse_keymap_free(inputdev);
 604 err_free_dev:
 605         input_free_device(inputdev);
 606         return error;
 607 }
 608
 609 static void ideapad_input_exit(struct ideapad_private *priv)
 610 {
 611         sparse_keymap_free(priv->inputdev);
 612         input_unregister_device(priv->inputdev);
 613         priv->inputdev = NULL;
 614 }
 615
 616 static void ideapad_input_report(struct ideapad_private *priv,
 617                                  unsigned long scancode)
 618 {
 619         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 620 }
 621
 622 static void ideapad_input_novokey(struct ideapad_private *priv)
 623 {
 624         unsigned long long_pressed;
 625
 626         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
 627                 return;
 628         if (long_pressed)
 629                 ideapad_input_report(priv, 17);
 630         else
 631                 ideapad_input_report(priv, 16);
 632 }
 633
 634 static void ideapad_check_special_buttons(struct ideapad_private *priv)
 635 {
 636         unsigned long bit, value;
 637
 638         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
 639
 640         for (bit = 0; bit < 16; bit++) {
 641                 if (test_bit(bit, &value)) {
 642                         switch (bit) {
 643                         case 0: /* Z580 */
 644                         case 6: /* Z570 */
 645                                 /* Thermal Management button */
 646                                 ideapad_input_report(priv, 65);
 647                                 break;
 648                         case 1:
 649                                 /* OneKey Theater button */
 650                                 ideapad_input_report(priv, 64);
 651                                 break;
 652                         default:
 653                                 pr_info("Unknown special button: %lu\n", bit);
 654                                 break;
 655                         }
 656                 }
 657         }
 658 }
 659
 660 /*
 661  * backlight
 662  */
 663 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 664 {
 665         struct ideapad_private *priv = bl_get_data(blightdev);
 666         unsigned long now;
 667
 668         if (!priv)
 669                 return -EINVAL;
 670
 671         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 672                 return -EIO;
 673         return now;
 674 }
 675
 676 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 677 {
 678         struct ideapad_private *priv = bl_get_data(blightdev);
 679
 680         if (!priv)
 681                 return -EINVAL;
 682
 683         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
 684                          blightdev->props.brightness))
 685                 return -EIO;
 686         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
 687                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 688                 return -EIO;
 689
 690         return 0;
 691 }
 692
 693 static const struct backlight_ops ideapad_backlight_ops = {
 694         .get_brightness = ideapad_backlight_get_brightness,
 695         .update_status = ideapad_backlight_update_status,
 696 };
 697
 698 static int ideapad_backlight_init(struct ideapad_private *priv)
 699 {
 700         struct backlight_device *blightdev;
 701         struct backlight_properties props;
 702         unsigned long max, now, power;
 703
 704         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
 705                 return -EIO;
 706         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 707                 return -EIO;
 708         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 709                 return -EIO;
 710
 711         memset(&props, 0, sizeof(struct backlight_properties));
 712         props.max_brightness = max;
 713         props.type = BACKLIGHT_PLATFORM;
 714         blightdev = backlight_device_register("ideapad",
 715                                               &priv->platform_device->dev,
 716                                               priv,
 717                                               &ideapad_backlight_ops,
 718                                               &props);
 719         if (IS_ERR(blightdev)) {
 720                 pr_err("Could not register backlight device\n");
 721                 return PTR_ERR(blightdev);
 722         }
 723
 724         priv->blightdev = blightdev;
 725         blightdev->props.brightness = now;
 726         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 727         backlight_update_status(blightdev);
 728
 729         return 0;
 730 }
 731
 732 static void ideapad_backlight_exit(struct ideapad_private *priv)
 733 {
 734         backlight_device_unregister(priv->blightdev);
 735         priv->blightdev = NULL;
 736 }
 737
 738 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 739 {
 740         unsigned long power;
 741         struct backlight_device *blightdev = priv->blightdev;
 742
 743         if (!blightdev)
 744                 return;
 745         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 746                 return;
 747         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 748 }
 749
 750 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 751 {
 752         unsigned long now;
 753
 754         /* if we control brightness via acpi video driver */
 755         if (priv->blightdev == NULL) {
 756                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
 757                 return;
 758         }
 759
 760         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 761 }
 762
 763 /*
 764  * module init/exit
 765  */
 766 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 767 {
 768         unsigned long value;
 769
 770         /* Without reading from EC touchpad LED doesn't switch state */
 771         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
 772                 /* Some IdeaPads don't really turn off touchpad - they only
 773                  * switch the LED state. We (de)activate KBC AUX port to turn
 774                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
 775                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
 776                 unsigned char param;
 777                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
 778                               I8042_CMD_AUX_DISABLE);
 779                 ideapad_input_report(priv, value ? 67 : 66);
 780         }
 781 }
 782
 783 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 784 {
 785         struct ideapad_private *priv = data;
 786         unsigned long vpc1, vpc2, vpc_bit;
 787
 788         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 789                 return;
 790         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 791                 return;
 792
 793         vpc1 = (vpc2 << 8) | vpc1;
 794         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 795                 if (test_bit(vpc_bit, &vpc1)) {
 796                         switch (vpc_bit) {
 797                         case 9:
 798                                 ideapad_sync_rfk_state(priv);
 799                                 break;
 800                         case 13:
 801                         case 11:
 802                         case 7:
 803                         case 6:
 804                                 ideapad_input_report(priv, vpc_bit);
 805                                 break;
 806                         case 5:
 807                                 ideapad_sync_touchpad_state(priv);
 808                                 break;
 809                         case 4:
 810                                 ideapad_backlight_notify_brightness(priv);
 811                                 break;
 812                         case 3:
 813                                 ideapad_input_novokey(priv);
 814                                 break;
 815                         case 2:
 816                                 ideapad_backlight_notify_power(priv);
 817                                 break;
 818                         case 0:
 819                                 ideapad_check_special_buttons(priv);
 820                                 break;
 821                         default:
 822                                 pr_info("Unknown event: %lu\n", vpc_bit);
 823                         }
 824                 }
 825         }
 826 }
 827
 828 /*
 829  * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
 830  * always results in 0 on these models, causing ideapad_laptop to wrongly
 831  * report all radios as hardware-blocked.
 832  */
 833 static const struct dmi_system_id no_hw_rfkill_list[] = {
 834         {
 835                 .ident = "Lenovo G40-30",
 836                 .matches = {
 837                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 838                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
 839                 },
 840         },
 841         {
 842                 .ident = "Lenovo G50-30",
 843                 .matches = {
 844                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 845                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
 846                 },
 847         },
 848         {
 849                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
 850                 .matches = {
 851                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 852                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
 853                 },
 854         },
 855         {
 856                 .ident = "Lenovo Yoga 3 14",
 857                 .matches = {
 858                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 859                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3 14"),
 860                 },
 861         },
 862         {
 863                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
 864                 .matches = {
 865                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 866                         DMI_MATCH(DMI_BOARD_NAME, "Yoga2"),
 867                 },
 868         },
 869         {
 870                 .ident = "Lenovo Yoga 3 Pro 1370",
 871                 .matches = {
 872                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 873                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3 Pro-1370"),
 874                 },
 875         },
 876         {}
 877 };
 878
 879 static int ideapad_acpi_add(struct platform_device *pdev)
 880 {
 881         int ret, i;
 882         int cfg;
 883         struct ideapad_private *priv;
 884         struct acpi_device *adev;
 885
 886         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
 887         if (ret)
 888                 return -ENODEV;
 889
 890         if (read_method_int(adev->handle, "_CFG", &cfg))
 891                 return -ENODEV;
 892
 893         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 894         if (!priv)
 895                 return -ENOMEM;
 896
 897         dev_set_drvdata(&pdev->dev, priv);
 898         priv->cfg = cfg;
 899         priv->adev = adev;
 900         priv->platform_device = pdev;
 901         priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
 902
 903         ret = ideapad_sysfs_init(priv);
 904         if (ret)
 905                 return ret;
 906
 907         ret = ideapad_debugfs_init(priv);
 908         if (ret)
 909                 goto debugfs_failed;
 910
 911         ret = ideapad_input_init(priv);
 912         if (ret)
 913                 goto input_failed;
 914
 915         /*
 916          * On some models without a hw-switch (the yoga 2 13 at least)
 917          * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
 918          */
 919         if (!priv->has_hw_rfkill_switch)
 920                 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
 921
 922         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 923                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
 924                         ideapad_register_rfkill(priv, i);
 925
 926         ideapad_sync_rfk_state(priv);
 927         ideapad_sync_touchpad_state(priv);
 928
 929         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
 930                 ret = ideapad_backlight_init(priv);
 931                 if (ret && ret != -ENODEV)
 932                         goto backlight_failed;
 933         }
 934         ret = acpi_install_notify_handler(adev->handle,
 935                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
 936         if (ret)
 937                 goto notification_failed;
 938
 939         return 0;
 940 notification_failed:
 941         ideapad_backlight_exit(priv);
 942 backlight_failed:
 943         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 944                 ideapad_unregister_rfkill(priv, i);
 945         ideapad_input_exit(priv);
 946 input_failed:
 947         ideapad_debugfs_exit(priv);
 948 debugfs_failed:
 949         ideapad_sysfs_exit(priv);
 950         return ret;
 951 }
 952
 953 static int ideapad_acpi_remove(struct platform_device *pdev)
 954 {
 955         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
 956         int i;
 957
 958         acpi_remove_notify_handler(priv->adev->handle,
 959                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
 960         ideapad_backlight_exit(priv);
 961         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 962                 ideapad_unregister_rfkill(priv, i);
 963         ideapad_input_exit(priv);
 964         ideapad_debugfs_exit(priv);
 965         ideapad_sysfs_exit(priv);
 966         dev_set_drvdata(&pdev->dev, NULL);
 967
 968         return 0;
 969 }
 970
 971 #ifdef CONFIG_PM_SLEEP
 972 static int ideapad_acpi_resume(struct device *device)
 973 {
 974         struct ideapad_private *priv;
 975
 976         if (!device)
 977                 return -EINVAL;
 978         priv = dev_get_drvdata(device);
 979
 980         ideapad_sync_rfk_state(priv);
 981         ideapad_sync_touchpad_state(priv);
 982         return 0;
 983 }
 984 #endif
 985 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
 986
 987 static const struct acpi_device_id ideapad_device_ids[] = {
 988         { "VPC2004", 0},
 989         { "", 0},
 990 };
 991 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 992
 993 static struct platform_driver ideapad_acpi_driver = {
 994         .probe = ideapad_acpi_add,
 995         .remove = ideapad_acpi_remove,
 996         .driver = {
 997                 .name   = "ideapad_acpi",
 998                 .pm     = &ideapad_pm,
 999                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
1000         },
1001 };
1002
1003 module_platform_driver(ideapad_acpi_driver);
1004
1005 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1006 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1007 MODULE_LICENSE("GPL");