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 <acpi/acpi_bus.h>
  30 #include <acpi/acpi_drivers.h>
  31 #include <linux/rfkill.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/input.h>
  34 #include <linux/input/sparse-keymap.h>
  35 #include <linux/backlight.h>
  36 #include <linux/fb.h>
  37 #include <linux/debugfs.h>
  38 #include <linux/seq_file.h>
  39 #include <linux/i8042.h>
  40
  41 #define IDEAPAD_RFKILL_DEV_NUM  (3)
  42
  43 #define CFG_BT_BIT      (16)
  44 #define CFG_3G_BIT      (17)
  45 #define CFG_WIFI_BIT    (18)
  46 #define CFG_CAMERA_BIT  (19)
  47
  48 enum {
  49         VPCCMD_R_VPC1 = 0x10,
  50         VPCCMD_R_BL_MAX,
  51         VPCCMD_R_BL,
  52         VPCCMD_W_BL,
  53         VPCCMD_R_WIFI,
  54         VPCCMD_W_WIFI,
  55         VPCCMD_R_BT,
  56         VPCCMD_W_BT,
  57         VPCCMD_R_BL_POWER,
  58         VPCCMD_R_NOVO,
  59         VPCCMD_R_VPC2,
  60         VPCCMD_R_TOUCHPAD,
  61         VPCCMD_W_TOUCHPAD,
  62         VPCCMD_R_CAMERA,
  63         VPCCMD_W_CAMERA,
  64         VPCCMD_R_3G,
  65         VPCCMD_W_3G,
  66         VPCCMD_R_ODD, /* 0x21 */
  67         VPCCMD_R_RF = 0x23,
  68         VPCCMD_W_RF,
  69         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
  70         VPCCMD_W_BL_POWER = 0x33,
  71 };
  72
  73 struct ideapad_private {
  74         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
  75         struct platform_device *platform_device;
  76         struct input_dev *inputdev;
  77         struct backlight_device *blightdev;
  78         struct dentry *debug;
  79         unsigned long cfg;
  80 };
  81
  82 static acpi_handle ideapad_handle;
  83 static struct ideapad_private *ideapad_priv;
  84 static bool no_bt_rfkill;
  85 module_param(no_bt_rfkill, bool, 0444);
  86 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
  87
  88 /*
  89  * ACPI Helpers
  90  */
  91 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
  92
  93 static int read_method_int(acpi_handle handle, const char *method, int *val)
  94 {
  95         acpi_status status;
  96         unsigned long long result;
  97
  98         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
  99         if (ACPI_FAILURE(status)) {
 100                 *val = -1;
 101                 return -1;
 102         } else {
 103                 *val = result;
 104                 return 0;
 105         }
 106 }
 107
 108 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
 109 {
 110         acpi_status status;
 111         unsigned long long result;
 112         struct acpi_object_list params;
 113         union acpi_object in_obj;
 114
 115         params.count = 1;
 116         params.pointer = &in_obj;
 117         in_obj.type = ACPI_TYPE_INTEGER;
 118         in_obj.integer.value = cmd;
 119
 120         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
 121
 122         if (ACPI_FAILURE(status)) {
 123                 *ret = -1;
 124                 return -1;
 125         } else {
 126                 *ret = result;
 127                 return 0;
 128         }
 129 }
 130
 131 static int method_vpcw(acpi_handle handle, int cmd, int data)
 132 {
 133         struct acpi_object_list params;
 134         union acpi_object in_obj[2];
 135         acpi_status status;
 136
 137         params.count = 2;
 138         params.pointer = in_obj;
 139         in_obj[0].type = ACPI_TYPE_INTEGER;
 140         in_obj[0].integer.value = cmd;
 141         in_obj[1].type = ACPI_TYPE_INTEGER;
 142         in_obj[1].integer.value = data;
 143
 144         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 145         if (status != AE_OK)
 146                 return -1;
 147         return 0;
 148 }
 149
 150 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 151 {
 152         int val;
 153         unsigned long int end_jiffies;
 154
 155         if (method_vpcw(handle, 1, cmd))
 156                 return -1;
 157
 158         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 159              time_before(jiffies, end_jiffies);) {
 160                 schedule();
 161                 if (method_vpcr(handle, 1, &val))
 162                         return -1;
 163                 if (val == 0) {
 164                         if (method_vpcr(handle, 0, &val))
 165                                 return -1;
 166                         *data = val;
 167                         return 0;
 168                 }
 169         }
 170         pr_err("timeout in read_ec_cmd\n");
 171         return -1;
 172 }
 173
 174 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 175 {
 176         int val;
 177         unsigned long int end_jiffies;
 178
 179         if (method_vpcw(handle, 0, data))
 180                 return -1;
 181         if (method_vpcw(handle, 1, cmd))
 182                 return -1;
 183
 184         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 185              time_before(jiffies, end_jiffies);) {
 186                 schedule();
 187                 if (method_vpcr(handle, 1, &val))
 188                         return -1;
 189                 if (val == 0)
 190                         return 0;
 191         }
 192         pr_err("timeout in write_ec_cmd\n");
 193         return -1;
 194 }
 195
 196 /*
 197  * debugfs
 198  */
 199 static int debugfs_status_show(struct seq_file *s, void *data)
 200 {
 201         unsigned long value;
 202
 203         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &value))
 204                 seq_printf(s, "Backlight max:\t%lu\n", value);
 205         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL, &value))
 206                 seq_printf(s, "Backlight now:\t%lu\n", value);
 207         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &value))
 208                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
 209         seq_printf(s, "=====================\n");
 210
 211         if (!read_ec_data(ideapad_handle, VPCCMD_R_RF, &value))
 212                 seq_printf(s, "Radio status:\t%s(%lu)\n",
 213                            value ? "On" : "Off", value);
 214         if (!read_ec_data(ideapad_handle, VPCCMD_R_WIFI, &value))
 215                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
 216                            value ? "On" : "Off", value);
 217         if (!read_ec_data(ideapad_handle, VPCCMD_R_BT, &value))
 218                 seq_printf(s, "BT status:\t%s(%lu)\n",
 219                            value ? "On" : "Off", value);
 220         if (!read_ec_data(ideapad_handle, VPCCMD_R_3G, &value))
 221                 seq_printf(s, "3G status:\t%s(%lu)\n",
 222                            value ? "On" : "Off", value);
 223         seq_printf(s, "=====================\n");
 224
 225         if (!read_ec_data(ideapad_handle, VPCCMD_R_TOUCHPAD, &value))
 226                 seq_printf(s, "Touchpad status:%s(%lu)\n",
 227                            value ? "On" : "Off", value);
 228         if (!read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &value))
 229                 seq_printf(s, "Camera status:\t%s(%lu)\n",
 230                            value ? "On" : "Off", value);
 231
 232         return 0;
 233 }
 234
 235 static int debugfs_status_open(struct inode *inode, struct file *file)
 236 {
 237         return single_open(file, debugfs_status_show, NULL);
 238 }
 239
 240 static const struct file_operations debugfs_status_fops = {
 241         .owner = THIS_MODULE,
 242         .open = debugfs_status_open,
 243         .read = seq_read,
 244         .llseek = seq_lseek,
 245         .release = single_release,
 246 };
 247
 248 static int debugfs_cfg_show(struct seq_file *s, void *data)
 249 {
 250         if (!ideapad_priv) {
 251                 seq_printf(s, "cfg: N/A\n");
 252         } else {
 253                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
 254                            ideapad_priv->cfg);
 255                 if (test_bit(CFG_BT_BIT, &ideapad_priv->cfg))
 256                         seq_printf(s, "Bluetooth ");
 257                 if (test_bit(CFG_3G_BIT, &ideapad_priv->cfg))
 258                         seq_printf(s, "3G ");
 259                 if (test_bit(CFG_WIFI_BIT, &ideapad_priv->cfg))
 260                         seq_printf(s, "Wireless ");
 261                 if (test_bit(CFG_CAMERA_BIT, &ideapad_priv->cfg))
 262                         seq_printf(s, "Camera ");
 263                 seq_printf(s, "\nGraphic: ");
 264                 switch ((ideapad_priv->cfg)&0x700) {
 265                 case 0x100:
 266                         seq_printf(s, "Intel");
 267                         break;
 268                 case 0x200:
 269                         seq_printf(s, "ATI");
 270                         break;
 271                 case 0x300:
 272                         seq_printf(s, "Nvidia");
 273                         break;
 274                 case 0x400:
 275                         seq_printf(s, "Intel and ATI");
 276                         break;
 277                 case 0x500:
 278                         seq_printf(s, "Intel and Nvidia");
 279                         break;
 280                 }
 281                 seq_printf(s, "\n");
 282         }
 283         return 0;
 284 }
 285
 286 static int debugfs_cfg_open(struct inode *inode, struct file *file)
 287 {
 288         return single_open(file, debugfs_cfg_show, NULL);
 289 }
 290
 291 static const struct file_operations debugfs_cfg_fops = {
 292         .owner = THIS_MODULE,
 293         .open = debugfs_cfg_open,
 294         .read = seq_read,
 295         .llseek = seq_lseek,
 296         .release = single_release,
 297 };
 298
 299 static int __devinit ideapad_debugfs_init(struct ideapad_private *priv)
 300 {
 301         struct dentry *node;
 302
 303         priv->debug = debugfs_create_dir("ideapad", NULL);
 304         if (priv->debug == NULL) {
 305                 pr_err("failed to create debugfs directory");
 306                 goto errout;
 307         }
 308
 309         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, NULL,
 310                                    &debugfs_cfg_fops);
 311         if (!node) {
 312                 pr_err("failed to create cfg in debugfs");
 313                 goto errout;
 314         }
 315
 316         node = debugfs_create_file("status", S_IRUGO, priv->debug, NULL,
 317                                    &debugfs_status_fops);
 318         if (!node) {
 319                 pr_err("failed to create status in debugfs");
 320                 goto errout;
 321         }
 322
 323         return 0;
 324
 325 errout:
 326         return -ENOMEM;
 327 }
 328
 329 static void ideapad_debugfs_exit(struct ideapad_private *priv)
 330 {
 331         debugfs_remove_recursive(priv->debug);
 332         priv->debug = NULL;
 333 }
 334
 335 /*
 336  * sysfs
 337  */
 338 static ssize_t show_ideapad_cam(struct device *dev,
 339                                 struct device_attribute *attr,
 340                                 char *buf)
 341 {
 342         unsigned long result;
 343
 344         if (read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &result))
 345                 return sprintf(buf, "-1\n");
 346         return sprintf(buf, "%lu\n", result);
 347 }
 348
 349 static ssize_t store_ideapad_cam(struct device *dev,
 350                                  struct device_attribute *attr,
 351                                  const char *buf, size_t count)
 352 {
 353         int ret, state;
 354
 355         if (!count)
 356                 return 0;
 357         if (sscanf(buf, "%i", &state) != 1)
 358                 return -EINVAL;
 359         ret = write_ec_cmd(ideapad_handle, VPCCMD_W_CAMERA, state);
 360         if (ret < 0)
 361                 return ret;
 362         return count;
 363 }
 364
 365 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 366
 367 static struct attribute *ideapad_attributes[] = {
 368         &dev_attr_camera_power.attr,
 369         NULL
 370 };
 371
 372 static umode_t ideapad_is_visible(struct kobject *kobj,
 373                                  struct attribute *attr,
 374                                  int idx)
 375 {
 376         struct device *dev = container_of(kobj, struct device, kobj);
 377         struct ideapad_private *priv = dev_get_drvdata(dev);
 378         bool supported;
 379
 380         if (attr == &dev_attr_camera_power.attr)
 381                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
 382         else
 383                 supported = true;
 384
 385         return supported ? attr->mode : 0;
 386 }
 387
 388 static struct attribute_group ideapad_attribute_group = {
 389         .is_visible = ideapad_is_visible,
 390         .attrs = ideapad_attributes
 391 };
 392
 393 /*
 394  * Rfkill
 395  */
 396 struct ideapad_rfk_data {
 397         char *name;
 398         int cfgbit;
 399         int opcode;
 400         int type;
 401 };
 402
 403 const struct ideapad_rfk_data ideapad_rfk_data[] = {
 404         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
 405         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
 406         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
 407 };
 408
 409 static int ideapad_rfk_set(void *data, bool blocked)
 410 {
 411         unsigned long opcode = (unsigned long)data;
 412
 413         return write_ec_cmd(ideapad_handle, opcode, !blocked);
 414 }
 415
 416 static struct rfkill_ops ideapad_rfk_ops = {
 417         .set_block = ideapad_rfk_set,
 418 };
 419
 420 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 421 {
 422         unsigned long hw_blocked;
 423         int i;
 424
 425         if (read_ec_data(ideapad_handle, VPCCMD_R_RF, &hw_blocked))
 426                 return;
 427         hw_blocked = !hw_blocked;
 428
 429         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 430                 if (priv->rfk[i])
 431                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 432 }
 433
 434 static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
 435                                              int dev)
 436 {
 437         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 438         int ret;
 439         unsigned long sw_blocked;
 440
 441         if (no_bt_rfkill &&
 442             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 443                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 444                 write_ec_cmd(ideapad_handle,
 445                              ideapad_rfk_data[dev].opcode, 1);
 446                 return 0;
 447         }
 448
 449         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
 450                                       ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
 451                                       (void *)(long)dev);
 452         if (!priv->rfk[dev])
 453                 return -ENOMEM;
 454
 455         if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
 456                          &sw_blocked)) {
 457                 rfkill_init_sw_state(priv->rfk[dev], 0);
 458         } else {
 459                 sw_blocked = !sw_blocked;
 460                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 461         }
 462
 463         ret = rfkill_register(priv->rfk[dev]);
 464         if (ret) {
 465                 rfkill_destroy(priv->rfk[dev]);
 466                 return ret;
 467         }
 468         return 0;
 469 }
 470
 471 static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
 472 {
 473         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 474
 475         if (!priv->rfk[dev])
 476                 return;
 477
 478         rfkill_unregister(priv->rfk[dev]);
 479         rfkill_destroy(priv->rfk[dev]);
 480 }
 481
 482 /*
 483  * Platform device
 484  */
 485 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
 486 {
 487         int result;
 488
 489         priv->platform_device = platform_device_alloc("ideapad", -1);
 490         if (!priv->platform_device)
 491                 return -ENOMEM;
 492         platform_set_drvdata(priv->platform_device, priv);
 493
 494         result = platform_device_add(priv->platform_device);
 495         if (result)
 496                 goto fail_platform_device;
 497
 498         result = sysfs_create_group(&priv->platform_device->dev.kobj,
 499                                     &ideapad_attribute_group);
 500         if (result)
 501                 goto fail_sysfs;
 502         return 0;
 503
 504 fail_sysfs:
 505         platform_device_del(priv->platform_device);
 506 fail_platform_device:
 507         platform_device_put(priv->platform_device);
 508         return result;
 509 }
 510
 511 static void ideapad_platform_exit(struct ideapad_private *priv)
 512 {
 513         sysfs_remove_group(&priv->platform_device->dev.kobj,
 514                            &ideapad_attribute_group);
 515         platform_device_unregister(priv->platform_device);
 516 }
 517
 518 /*
 519  * input device
 520  */
 521 static const struct key_entry ideapad_keymap[] = {
 522         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
 523         { KE_KEY, 7,  { KEY_CAMERA } },
 524         { KE_KEY, 11, { KEY_F16 } },
 525         { KE_KEY, 13, { KEY_WLAN } },
 526         { KE_KEY, 16, { KEY_PROG1 } },
 527         { KE_KEY, 17, { KEY_PROG2 } },
 528         { KE_KEY, 64, { KEY_PROG3 } },
 529         { KE_KEY, 65, { KEY_PROG4 } },
 530         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
 531         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
 532         { KE_END, 0 },
 533 };
 534
 535 static int __devinit ideapad_input_init(struct ideapad_private *priv)
 536 {
 537         struct input_dev *inputdev;
 538         int error;
 539
 540         inputdev = input_allocate_device();
 541         if (!inputdev) {
 542                 pr_info("Unable to allocate input device\n");
 543                 return -ENOMEM;
 544         }
 545
 546         inputdev->name = "Ideapad extra buttons";
 547         inputdev->phys = "ideapad/input0";
 548         inputdev->id.bustype = BUS_HOST;
 549         inputdev->dev.parent = &priv->platform_device->dev;
 550
 551         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 552         if (error) {
 553                 pr_err("Unable to setup input device keymap\n");
 554                 goto err_free_dev;
 555         }
 556
 557         error = input_register_device(inputdev);
 558         if (error) {
 559                 pr_err("Unable to register input device\n");
 560                 goto err_free_keymap;
 561         }
 562
 563         priv->inputdev = inputdev;
 564         return 0;
 565
 566 err_free_keymap:
 567         sparse_keymap_free(inputdev);
 568 err_free_dev:
 569         input_free_device(inputdev);
 570         return error;
 571 }
 572
 573 static void ideapad_input_exit(struct ideapad_private *priv)
 574 {
 575         sparse_keymap_free(priv->inputdev);
 576         input_unregister_device(priv->inputdev);
 577         priv->inputdev = NULL;
 578 }
 579
 580 static void ideapad_input_report(struct ideapad_private *priv,
 581                                  unsigned long scancode)
 582 {
 583         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 584 }
 585
 586 static void ideapad_input_novokey(struct ideapad_private *priv)
 587 {
 588         unsigned long long_pressed;
 589
 590         if (read_ec_data(ideapad_handle, VPCCMD_R_NOVO, &long_pressed))
 591                 return;
 592         if (long_pressed)
 593                 ideapad_input_report(priv, 17);
 594         else
 595                 ideapad_input_report(priv, 16);
 596 }
 597
 598 static void ideapad_check_special_buttons(struct ideapad_private *priv)
 599 {
 600         unsigned long bit, value;
 601
 602         read_ec_data(ideapad_handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
 603
 604         for (bit = 0; bit < 16; bit++) {
 605                 if (test_bit(bit, &value)) {
 606                         switch (bit) {
 607                         case 6:
 608                                 /* Thermal Management button */
 609                                 ideapad_input_report(priv, 65);
 610                                 break;
 611                         case 1:
 612                                 /* OneKey Theater button */
 613                                 ideapad_input_report(priv, 64);
 614                                 break;
 615                         }
 616                 }
 617         }
 618 }
 619
 620 /*
 621  * backlight
 622  */
 623 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 624 {
 625         unsigned long now;
 626
 627         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
 628                 return -EIO;
 629         return now;
 630 }
 631
 632 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 633 {
 634         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL,
 635                          blightdev->props.brightness))
 636                 return -EIO;
 637         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL_POWER,
 638                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 639                 return -EIO;
 640
 641         return 0;
 642 }
 643
 644 static const struct backlight_ops ideapad_backlight_ops = {
 645         .get_brightness = ideapad_backlight_get_brightness,
 646         .update_status = ideapad_backlight_update_status,
 647 };
 648
 649 static int ideapad_backlight_init(struct ideapad_private *priv)
 650 {
 651         struct backlight_device *blightdev;
 652         struct backlight_properties props;
 653         unsigned long max, now, power;
 654
 655         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &max))
 656                 return -EIO;
 657         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
 658                 return -EIO;
 659         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
 660                 return -EIO;
 661
 662         memset(&props, 0, sizeof(struct backlight_properties));
 663         props.max_brightness = max;
 664         props.type = BACKLIGHT_PLATFORM;
 665         blightdev = backlight_device_register("ideapad",
 666                                               &priv->platform_device->dev,
 667                                               priv,
 668                                               &ideapad_backlight_ops,
 669                                               &props);
 670         if (IS_ERR(blightdev)) {
 671                 pr_err("Could not register backlight device\n");
 672                 return PTR_ERR(blightdev);
 673         }
 674
 675         priv->blightdev = blightdev;
 676         blightdev->props.brightness = now;
 677         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 678         backlight_update_status(blightdev);
 679
 680         return 0;
 681 }
 682
 683 static void ideapad_backlight_exit(struct ideapad_private *priv)
 684 {
 685         if (priv->blightdev)
 686                 backlight_device_unregister(priv->blightdev);
 687         priv->blightdev = NULL;
 688 }
 689
 690 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 691 {
 692         unsigned long power;
 693         struct backlight_device *blightdev = priv->blightdev;
 694
 695         if (!blightdev)
 696                 return;
 697         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
 698                 return;
 699         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 700 }
 701
 702 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 703 {
 704         unsigned long now;
 705
 706         /* if we control brightness via acpi video driver */
 707         if (priv->blightdev == NULL) {
 708                 read_ec_data(ideapad_handle, VPCCMD_R_BL, &now);
 709                 return;
 710         }
 711
 712         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 713 }
 714
 715 /*
 716  * module init/exit
 717  */
 718 static const struct acpi_device_id ideapad_device_ids[] = {
 719         { "VPC2004", 0},
 720         { "", 0},
 721 };
 722 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 723
 724 static void ideapad_sync_touchpad_state(struct acpi_device *adevice)
 725 {
 726         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 727         unsigned long value;
 728
 729         /* Without reading from EC touchpad LED doesn't switch state */
 730         if (!read_ec_data(adevice->handle, VPCCMD_R_TOUCHPAD, &value)) {
 731                 /* Some IdeaPads don't really turn off touchpad - they only
 732                  * switch the LED state. We (de)activate KBC AUX port to turn
 733                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
 734                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
 735                 unsigned char param;
 736                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
 737                               I8042_CMD_AUX_DISABLE);
 738                 ideapad_input_report(priv, value ? 67 : 66);
 739         }
 740 }
 741
 742 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
 743 {
 744         int ret, i;
 745         int cfg;
 746         struct ideapad_private *priv;
 747
 748         if (read_method_int(adevice->handle, "_CFG", &cfg))
 749                 return -ENODEV;
 750
 751         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 752         if (!priv)
 753                 return -ENOMEM;
 754         dev_set_drvdata(&adevice->dev, priv);
 755         ideapad_priv = priv;
 756         ideapad_handle = adevice->handle;
 757         priv->cfg = cfg;
 758
 759         ret = ideapad_platform_init(priv);
 760         if (ret)
 761                 goto platform_failed;
 762
 763         ret = ideapad_debugfs_init(priv);
 764         if (ret)
 765                 goto debugfs_failed;
 766
 767         ret = ideapad_input_init(priv);
 768         if (ret)
 769                 goto input_failed;
 770
 771         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
 772                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
 773                         ideapad_register_rfkill(adevice, i);
 774                 else
 775                         priv->rfk[i] = NULL;
 776         }
 777         ideapad_sync_rfk_state(priv);
 778         ideapad_sync_touchpad_state(adevice);
 779
 780         if (!acpi_video_backlight_support()) {
 781                 ret = ideapad_backlight_init(priv);
 782                 if (ret && ret != -ENODEV)
 783                         goto backlight_failed;
 784         }
 785
 786         return 0;
 787
 788 backlight_failed:
 789         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 790                 ideapad_unregister_rfkill(adevice, i);
 791         ideapad_input_exit(priv);
 792 input_failed:
 793         ideapad_debugfs_exit(priv);
 794 debugfs_failed:
 795         ideapad_platform_exit(priv);
 796 platform_failed:
 797         kfree(priv);
 798         return ret;
 799 }
 800
 801 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
 802 {
 803         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 804         int i;
 805
 806         ideapad_backlight_exit(priv);
 807         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 808                 ideapad_unregister_rfkill(adevice, i);
 809         ideapad_input_exit(priv);
 810         ideapad_debugfs_exit(priv);
 811         ideapad_platform_exit(priv);
 812         dev_set_drvdata(&adevice->dev, NULL);
 813         kfree(priv);
 814
 815         return 0;
 816 }
 817
 818 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
 819 {
 820         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 821         acpi_handle handle = adevice->handle;
 822         unsigned long vpc1, vpc2, vpc_bit;
 823
 824         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 825                 return;
 826         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 827                 return;
 828
 829         vpc1 = (vpc2 << 8) | vpc1;
 830         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 831                 if (test_bit(vpc_bit, &vpc1)) {
 832                         switch (vpc_bit) {
 833                         case 9:
 834                                 ideapad_sync_rfk_state(priv);
 835                                 break;
 836                         case 13:
 837                         case 11:
 838                         case 7:
 839                         case 6:
 840                                 ideapad_input_report(priv, vpc_bit);
 841                                 break;
 842                         case 5:
 843                                 ideapad_sync_touchpad_state(adevice);
 844                                 break;
 845                         case 4:
 846                                 ideapad_backlight_notify_brightness(priv);
 847                                 break;
 848                         case 3:
 849                                 ideapad_input_novokey(priv);
 850                                 break;
 851                         case 2:
 852                                 ideapad_backlight_notify_power(priv);
 853                                 break;
 854                         case 0:
 855                                 ideapad_check_special_buttons(priv);
 856                                 break;
 857                         default:
 858                                 pr_info("Unknown event: %lu\n", vpc_bit);
 859                         }
 860                 }
 861         }
 862 }
 863
 864 static int ideapad_acpi_resume(struct device *device)
 865 {
 866         ideapad_sync_rfk_state(ideapad_priv);
 867         ideapad_sync_touchpad_state(to_acpi_device(device));
 868         return 0;
 869 }
 870
 871 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
 872
 873 static struct acpi_driver ideapad_acpi_driver = {
 874         .name = "ideapad_acpi",
 875         .class = "IdeaPad",
 876         .ids = ideapad_device_ids,
 877         .ops.add = ideapad_acpi_add,
 878         .ops.remove = ideapad_acpi_remove,
 879         .ops.notify = ideapad_acpi_notify,
 880         .drv.pm = &ideapad_pm,
 881         .owner = THIS_MODULE,
 882 };
 883
 884 static int __init ideapad_acpi_module_init(void)
 885 {
 886         return acpi_bus_register_driver(&ideapad_acpi_driver);
 887 }
 888
 889 static void __exit ideapad_acpi_module_exit(void)
 890 {
 891         acpi_bus_unregister_driver(&ideapad_acpi_driver);
 892 }
 893
 894 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 895 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
 896 MODULE_LICENSE("GPL");
 897
 898 module_init(ideapad_acpi_module_init);
 899 module_exit(ideapad_acpi_module_exit);