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
  40 #define IDEAPAD_RFKILL_DEV_NUM  (3)
  41
  42 #define CFG_BT_BIT      (16)
  43 #define CFG_3G_BIT      (17)
  44 #define CFG_WIFI_BIT    (18)
  45 #define CFG_CAMERA_BIT  (19)
  46
  47 enum {
  48         VPCCMD_R_VPC1 = 0x10,
  49         VPCCMD_R_BL_MAX,
  50         VPCCMD_R_BL,
  51         VPCCMD_W_BL,
  52         VPCCMD_R_WIFI,
  53         VPCCMD_W_WIFI,
  54         VPCCMD_R_BT,
  55         VPCCMD_W_BT,
  56         VPCCMD_R_BL_POWER,
  57         VPCCMD_R_NOVO,
  58         VPCCMD_R_VPC2,
  59         VPCCMD_R_TOUCHPAD,
  60         VPCCMD_W_TOUCHPAD,
  61         VPCCMD_R_CAMERA,
  62         VPCCMD_W_CAMERA,
  63         VPCCMD_R_3G,
  64         VPCCMD_W_3G,
  65         VPCCMD_R_ODD, /* 0x21 */
  66         VPCCMD_W_FAN,
  67         VPCCMD_R_RF,
  68         VPCCMD_W_RF,
  69         VPCCMD_R_FAN = 0x2B,
  70         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
  71         VPCCMD_W_BL_POWER = 0x33,
  72 };
  73
  74 struct ideapad_rfk_priv {
  75         int dev;
  76         struct ideapad_private *priv;
  77 };
  78
  79 struct ideapad_private {
  80         struct acpi_device *adev;
  81         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
  82         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
  83         struct platform_device *platform_device;
  84         struct input_dev *inputdev;
  85         struct backlight_device *blightdev;
  86         struct dentry *debug;
  87         unsigned long cfg;
  88 };
  89
  90 static bool no_bt_rfkill;
  91 module_param(no_bt_rfkill, bool, 0444);
  92 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
  93
  94 /*
  95  * ACPI Helpers
  96  */
  97 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
  98
  99 static int read_method_int(acpi_handle handle, const char *method, int *val)
 100 {
 101         acpi_status status;
 102         unsigned long long result;
 103
 104         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 105         if (ACPI_FAILURE(status)) {
 106                 *val = -1;
 107                 return -1;
 108         } else {
 109                 *val = result;
 110                 return 0;
 111         }
 112 }
 113
 114 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
 115 {
 116         acpi_status status;
 117         unsigned long long result;
 118         struct acpi_object_list params;
 119         union acpi_object in_obj;
 120
 121         params.count = 1;
 122         params.pointer = &in_obj;
 123         in_obj.type = ACPI_TYPE_INTEGER;
 124         in_obj.integer.value = cmd;
 125
 126         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
 127
 128         if (ACPI_FAILURE(status)) {
 129                 *ret = -1;
 130                 return -1;
 131         } else {
 132                 *ret = result;
 133                 return 0;
 134         }
 135 }
 136
 137 static int method_vpcw(acpi_handle handle, int cmd, int data)
 138 {
 139         struct acpi_object_list params;
 140         union acpi_object in_obj[2];
 141         acpi_status status;
 142
 143         params.count = 2;
 144         params.pointer = in_obj;
 145         in_obj[0].type = ACPI_TYPE_INTEGER;
 146         in_obj[0].integer.value = cmd;
 147         in_obj[1].type = ACPI_TYPE_INTEGER;
 148         in_obj[1].integer.value = data;
 149
 150         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 151         if (status != AE_OK)
 152                 return -1;
 153         return 0;
 154 }
 155
 156 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 157 {
 158         int val;
 159         unsigned long int end_jiffies;
 160
 161         if (method_vpcw(handle, 1, cmd))
 162                 return -1;
 163
 164         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 165              time_before(jiffies, end_jiffies);) {
 166                 schedule();
 167                 if (method_vpcr(handle, 1, &val))
 168                         return -1;
 169                 if (val == 0) {
 170                         if (method_vpcr(handle, 0, &val))
 171                                 return -1;
 172                         *data = val;
 173                         return 0;
 174                 }
 175         }
 176         pr_err("timeout in read_ec_cmd\n");
 177         return -1;
 178 }
 179
 180 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 181 {
 182         int val;
 183         unsigned long int end_jiffies;
 184
 185         if (method_vpcw(handle, 0, data))
 186                 return -1;
 187         if (method_vpcw(handle, 1, cmd))
 188                 return -1;
 189
 190         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 191              time_before(jiffies, end_jiffies);) {
 192                 schedule();
 193                 if (method_vpcr(handle, 1, &val))
 194                         return -1;
 195                 if (val == 0)
 196                         return 0;
 197         }
 198         pr_err("timeout in write_ec_cmd\n");
 199         return -1;
 200 }
 201
 202 /*
 203  * debugfs
 204  */
 205 static int debugfs_status_show(struct seq_file *s, void *data)
 206 {
 207         struct ideapad_private *priv = s->private;
 208         unsigned long value;
 209
 210         if (!priv)
 211                 return -EINVAL;
 212
 213         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
 214                 seq_printf(s, "Backlight max:\t%lu\n", value);
 215         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
 216                 seq_printf(s, "Backlight now:\t%lu\n", value);
 217         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
 218                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
 219         seq_printf(s, "=====================\n");
 220
 221         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
 222                 seq_printf(s, "Radio status:\t%s(%lu)\n",
 223                            value ? "On" : "Off", value);
 224         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
 225                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
 226                            value ? "On" : "Off", value);
 227         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
 228                 seq_printf(s, "BT status:\t%s(%lu)\n",
 229                            value ? "On" : "Off", value);
 230         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
 231                 seq_printf(s, "3G status:\t%s(%lu)\n",
 232                            value ? "On" : "Off", value);
 233         seq_printf(s, "=====================\n");
 234
 235         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
 236                 seq_printf(s, "Touchpad status:%s(%lu)\n",
 237                            value ? "On" : "Off", value);
 238         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
 239                 seq_printf(s, "Camera status:\t%s(%lu)\n",
 240                            value ? "On" : "Off", value);
 241
 242         return 0;
 243 }
 244
 245 static int debugfs_status_open(struct inode *inode, struct file *file)
 246 {
 247         return single_open(file, debugfs_status_show, inode->i_private);
 248 }
 249
 250 static const struct file_operations debugfs_status_fops = {
 251         .owner = THIS_MODULE,
 252         .open = debugfs_status_open,
 253         .read = seq_read,
 254         .llseek = seq_lseek,
 255         .release = single_release,
 256 };
 257
 258 static int debugfs_cfg_show(struct seq_file *s, void *data)
 259 {
 260         struct ideapad_private *priv = s->private;
 261
 262         if (!priv) {
 263                 seq_printf(s, "cfg: N/A\n");
 264         } else {
 265                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
 266                            priv->cfg);
 267                 if (test_bit(CFG_BT_BIT, &priv->cfg))
 268                         seq_printf(s, "Bluetooth ");
 269                 if (test_bit(CFG_3G_BIT, &priv->cfg))
 270                         seq_printf(s, "3G ");
 271                 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
 272                         seq_printf(s, "Wireless ");
 273                 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
 274                         seq_printf(s, "Camera ");
 275                 seq_printf(s, "\nGraphic: ");
 276                 switch ((priv->cfg)&0x700) {
 277                 case 0x100:
 278                         seq_printf(s, "Intel");
 279                         break;
 280                 case 0x200:
 281                         seq_printf(s, "ATI");
 282                         break;
 283                 case 0x300:
 284                         seq_printf(s, "Nvidia");
 285                         break;
 286                 case 0x400:
 287                         seq_printf(s, "Intel and ATI");
 288                         break;
 289                 case 0x500:
 290                         seq_printf(s, "Intel and Nvidia");
 291                         break;
 292                 }
 293                 seq_printf(s, "\n");
 294         }
 295         return 0;
 296 }
 297
 298 static int debugfs_cfg_open(struct inode *inode, struct file *file)
 299 {
 300         return single_open(file, debugfs_cfg_show, inode->i_private);
 301 }
 302
 303 static const struct file_operations debugfs_cfg_fops = {
 304         .owner = THIS_MODULE,
 305         .open = debugfs_cfg_open,
 306         .read = seq_read,
 307         .llseek = seq_lseek,
 308         .release = single_release,
 309 };
 310
 311 static int ideapad_debugfs_init(struct ideapad_private *priv)
 312 {
 313         struct dentry *node;
 314
 315         priv->debug = debugfs_create_dir("ideapad", NULL);
 316         if (priv->debug == NULL) {
 317                 pr_err("failed to create debugfs directory");
 318                 goto errout;
 319         }
 320
 321         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
 322                                    &debugfs_cfg_fops);
 323         if (!node) {
 324                 pr_err("failed to create cfg in debugfs");
 325                 goto errout;
 326         }
 327
 328         node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
 329                                    &debugfs_status_fops);
 330         if (!node) {
 331                 pr_err("failed to create status in debugfs");
 332                 goto errout;
 333         }
 334
 335         return 0;
 336
 337 errout:
 338         return -ENOMEM;
 339 }
 340
 341 static void ideapad_debugfs_exit(struct ideapad_private *priv)
 342 {
 343         debugfs_remove_recursive(priv->debug);
 344         priv->debug = NULL;
 345 }
 346
 347 /*
 348  * sysfs
 349  */
 350 static ssize_t show_ideapad_cam(struct device *dev,
 351                                 struct device_attribute *attr,
 352                                 char *buf)
 353 {
 354         unsigned long result;
 355         struct ideapad_private *priv = dev_get_drvdata(dev);
 356
 357         if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
 358                 return sprintf(buf, "-1\n");
 359         return sprintf(buf, "%lu\n", result);
 360 }
 361
 362 static ssize_t store_ideapad_cam(struct device *dev,
 363                                  struct device_attribute *attr,
 364                                  const char *buf, size_t count)
 365 {
 366         int ret, state;
 367         struct ideapad_private *priv = dev_get_drvdata(dev);
 368
 369         if (!count)
 370                 return 0;
 371         if (sscanf(buf, "%i", &state) != 1)
 372                 return -EINVAL;
 373         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
 374         if (ret < 0)
 375                 return -EIO;
 376         return count;
 377 }
 378
 379 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 380
 381 static ssize_t show_ideapad_fan(struct device *dev,
 382                                 struct device_attribute *attr,
 383                                 char *buf)
 384 {
 385         unsigned long result;
 386         struct ideapad_private *priv = dev_get_drvdata(dev);
 387
 388         if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
 389                 return sprintf(buf, "-1\n");
 390         return sprintf(buf, "%lu\n", result);
 391 }
 392
 393 static ssize_t store_ideapad_fan(struct device *dev,
 394                                  struct device_attribute *attr,
 395                                  const char *buf, size_t count)
 396 {
 397         int ret, state;
 398         struct ideapad_private *priv = dev_get_drvdata(dev);
 399
 400         if (!count)
 401                 return 0;
 402         if (sscanf(buf, "%i", &state) != 1)
 403                 return -EINVAL;
 404         if (state < 0 || state > 4 || state == 3)
 405                 return -EINVAL;
 406         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
 407         if (ret < 0)
 408                 return -EIO;
 409         return count;
 410 }
 411
 412 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
 413
 414 static struct attribute *ideapad_attributes[] = {
 415         &dev_attr_camera_power.attr,
 416         &dev_attr_fan_mode.attr,
 417         NULL
 418 };
 419
 420 static umode_t ideapad_is_visible(struct kobject *kobj,
 421                                  struct attribute *attr,
 422                                  int idx)
 423 {
 424         struct device *dev = container_of(kobj, struct device, kobj);
 425         struct ideapad_private *priv = dev_get_drvdata(dev);
 426         bool supported;
 427
 428         if (attr == &dev_attr_camera_power.attr)
 429                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
 430         else if (attr == &dev_attr_fan_mode.attr) {
 431                 unsigned long value;
 432                 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
 433                                           &value);
 434         } else
 435                 supported = true;
 436
 437         return supported ? attr->mode : 0;
 438 }
 439
 440 static struct attribute_group ideapad_attribute_group = {
 441         .is_visible = ideapad_is_visible,
 442         .attrs = ideapad_attributes
 443 };
 444
 445 /*
 446  * Rfkill
 447  */
 448 struct ideapad_rfk_data {
 449         char *name;
 450         int cfgbit;
 451         int opcode;
 452         int type;
 453 };
 454
 455 const struct ideapad_rfk_data ideapad_rfk_data[] = {
 456         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
 457         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
 458         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
 459 };
 460
 461 static int ideapad_rfk_set(void *data, bool blocked)
 462 {
 463         struct ideapad_rfk_priv *priv = data;
 464
 465         return write_ec_cmd(priv->priv->adev->handle, priv->dev, !blocked);
 466 }
 467
 468 static struct rfkill_ops ideapad_rfk_ops = {
 469         .set_block = ideapad_rfk_set,
 470 };
 471
 472 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
 473 {
 474         unsigned long hw_blocked;
 475         int i;
 476
 477         if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
 478                 return;
 479         hw_blocked = !hw_blocked;
 480
 481         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 482                 if (priv->rfk[i])
 483                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 484 }
 485
 486 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
 487 {
 488         int ret;
 489         unsigned long sw_blocked;
 490
 491         if (no_bt_rfkill &&
 492             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 493                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 494                 write_ec_cmd(priv->adev->handle,
 495                              ideapad_rfk_data[dev].opcode, 1);
 496                 return 0;
 497         }
 498         priv->rfk_priv[dev].dev = dev;
 499         priv->rfk_priv[dev].priv = priv;
 500
 501         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
 502                                       &priv->platform_device->dev,
 503                                       ideapad_rfk_data[dev].type,
 504                                       &ideapad_rfk_ops,
 505                                       &priv->rfk_priv[dev]);
 506         if (!priv->rfk[dev])
 507                 return -ENOMEM;
 508
 509         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
 510                          &sw_blocked)) {
 511                 rfkill_init_sw_state(priv->rfk[dev], 0);
 512         } else {
 513                 sw_blocked = !sw_blocked;
 514                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 515         }
 516
 517         ret = rfkill_register(priv->rfk[dev]);
 518         if (ret) {
 519                 rfkill_destroy(priv->rfk[dev]);
 520                 return ret;
 521         }
 522         return 0;
 523 }
 524
 525 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
 526 {
 527         if (!priv->rfk[dev])
 528                 return;
 529
 530         rfkill_unregister(priv->rfk[dev]);
 531         rfkill_destroy(priv->rfk[dev]);
 532 }
 533
 534 /*
 535  * Platform device
 536  */
 537 static int ideapad_sysfs_init(struct ideapad_private *priv)
 538 {
 539         return sysfs_create_group(&priv->platform_device->dev.kobj,
 540                                     &ideapad_attribute_group);
 541 }
 542
 543 static void ideapad_sysfs_exit(struct ideapad_private *priv)
 544 {
 545         sysfs_remove_group(&priv->platform_device->dev.kobj,
 546                            &ideapad_attribute_group);
 547 }
 548
 549 /*
 550  * input device
 551  */
 552 static const struct key_entry ideapad_keymap[] = {
 553         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
 554         { KE_KEY, 7,  { KEY_CAMERA } },
 555         { KE_KEY, 11, { KEY_F16 } },
 556         { KE_KEY, 13, { KEY_WLAN } },
 557         { KE_KEY, 16, { KEY_PROG1 } },
 558         { KE_KEY, 17, { KEY_PROG2 } },
 559         { KE_KEY, 64, { KEY_PROG3 } },
 560         { KE_KEY, 65, { KEY_PROG4 } },
 561         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
 562         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
 563         { KE_END, 0 },
 564 };
 565
 566 static int ideapad_input_init(struct ideapad_private *priv)
 567 {
 568         struct input_dev *inputdev;
 569         int error;
 570
 571         inputdev = input_allocate_device();
 572         if (!inputdev)
 573                 return -ENOMEM;
 574
 575         inputdev->name = "Ideapad extra buttons";
 576         inputdev->phys = "ideapad/input0";
 577         inputdev->id.bustype = BUS_HOST;
 578         inputdev->dev.parent = &priv->platform_device->dev;
 579
 580         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 581         if (error) {
 582                 pr_err("Unable to setup input device keymap\n");
 583                 goto err_free_dev;
 584         }
 585
 586         error = input_register_device(inputdev);
 587         if (error) {
 588                 pr_err("Unable to register input device\n");
 589                 goto err_free_keymap;
 590         }
 591
 592         priv->inputdev = inputdev;
 593         return 0;
 594
 595 err_free_keymap:
 596         sparse_keymap_free(inputdev);
 597 err_free_dev:
 598         input_free_device(inputdev);
 599         return error;
 600 }
 601
 602 static void ideapad_input_exit(struct ideapad_private *priv)
 603 {
 604         sparse_keymap_free(priv->inputdev);
 605         input_unregister_device(priv->inputdev);
 606         priv->inputdev = NULL;
 607 }
 608
 609 static void ideapad_input_report(struct ideapad_private *priv,
 610                                  unsigned long scancode)
 611 {
 612         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 613 }
 614
 615 static void ideapad_input_novokey(struct ideapad_private *priv)
 616 {
 617         unsigned long long_pressed;
 618
 619         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
 620                 return;
 621         if (long_pressed)
 622                 ideapad_input_report(priv, 17);
 623         else
 624                 ideapad_input_report(priv, 16);
 625 }
 626
 627 static void ideapad_check_special_buttons(struct ideapad_private *priv)
 628 {
 629         unsigned long bit, value;
 630
 631         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
 632
 633         for (bit = 0; bit < 16; bit++) {
 634                 if (test_bit(bit, &value)) {
 635                         switch (bit) {
 636                         case 0: /* Z580 */
 637                         case 6: /* Z570 */
 638                                 /* Thermal Management button */
 639                                 ideapad_input_report(priv, 65);
 640                                 break;
 641                         case 1:
 642                                 /* OneKey Theater button */
 643                                 ideapad_input_report(priv, 64);
 644                                 break;
 645                         default:
 646                                 pr_info("Unknown special button: %lu\n", bit);
 647                                 break;
 648                         }
 649                 }
 650         }
 651 }
 652
 653 /*
 654  * backlight
 655  */
 656 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
 657 {
 658         struct ideapad_private *priv = bl_get_data(blightdev);
 659         unsigned long now;
 660
 661         if (!priv)
 662                 return -EINVAL;
 663
 664         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 665                 return -EIO;
 666         return now;
 667 }
 668
 669 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
 670 {
 671         struct ideapad_private *priv = bl_get_data(blightdev);
 672
 673         if (!priv)
 674                 return -EINVAL;
 675
 676         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
 677                          blightdev->props.brightness))
 678                 return -EIO;
 679         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
 680                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
 681                 return -EIO;
 682
 683         return 0;
 684 }
 685
 686 static const struct backlight_ops ideapad_backlight_ops = {
 687         .get_brightness = ideapad_backlight_get_brightness,
 688         .update_status = ideapad_backlight_update_status,
 689 };
 690
 691 static int ideapad_backlight_init(struct ideapad_private *priv)
 692 {
 693         struct backlight_device *blightdev;
 694         struct backlight_properties props;
 695         unsigned long max, now, power;
 696
 697         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
 698                 return -EIO;
 699         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
 700                 return -EIO;
 701         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 702                 return -EIO;
 703
 704         memset(&props, 0, sizeof(struct backlight_properties));
 705         props.max_brightness = max;
 706         props.type = BACKLIGHT_PLATFORM;
 707         blightdev = backlight_device_register("ideapad",
 708                                               &priv->platform_device->dev,
 709                                               priv,
 710                                               &ideapad_backlight_ops,
 711                                               &props);
 712         if (IS_ERR(blightdev)) {
 713                 pr_err("Could not register backlight device\n");
 714                 return PTR_ERR(blightdev);
 715         }
 716
 717         priv->blightdev = blightdev;
 718         blightdev->props.brightness = now;
 719         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 720         backlight_update_status(blightdev);
 721
 722         return 0;
 723 }
 724
 725 static void ideapad_backlight_exit(struct ideapad_private *priv)
 726 {
 727         if (priv->blightdev)
 728                 backlight_device_unregister(priv->blightdev);
 729         priv->blightdev = NULL;
 730 }
 731
 732 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
 733 {
 734         unsigned long power;
 735         struct backlight_device *blightdev = priv->blightdev;
 736
 737         if (!blightdev)
 738                 return;
 739         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
 740                 return;
 741         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
 742 }
 743
 744 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
 745 {
 746         unsigned long now;
 747
 748         /* if we control brightness via acpi video driver */
 749         if (priv->blightdev == NULL) {
 750                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
 751                 return;
 752         }
 753
 754         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
 755 }
 756
 757 /*
 758  * module init/exit
 759  */
 760 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
 761 {
 762         unsigned long value;
 763
 764         /* Without reading from EC touchpad LED doesn't switch state */
 765         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
 766                 /* Some IdeaPads don't really turn off touchpad - they only
 767                  * switch the LED state. We (de)activate KBC AUX port to turn
 768                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
 769                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
 770                 unsigned char param;
 771                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
 772                               I8042_CMD_AUX_DISABLE);
 773                 ideapad_input_report(priv, value ? 67 : 66);
 774         }
 775 }
 776
 777 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 778 {
 779         struct ideapad_private *priv = data;
 780         unsigned long vpc1, vpc2, vpc_bit;
 781
 782         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
 783                 return;
 784         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
 785                 return;
 786
 787         vpc1 = (vpc2 << 8) | vpc1;
 788         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 789                 if (test_bit(vpc_bit, &vpc1)) {
 790                         switch (vpc_bit) {
 791                         case 9:
 792                                 ideapad_sync_rfk_state(priv);
 793                                 break;
 794                         case 13:
 795                         case 11:
 796                         case 7:
 797                         case 6:
 798                                 ideapad_input_report(priv, vpc_bit);
 799                                 break;
 800                         case 5:
 801                                 ideapad_sync_touchpad_state(priv);
 802                                 break;
 803                         case 4:
 804                                 ideapad_backlight_notify_brightness(priv);
 805                                 break;
 806                         case 3:
 807                                 ideapad_input_novokey(priv);
 808                                 break;
 809                         case 2:
 810                                 ideapad_backlight_notify_power(priv);
 811                                 break;
 812                         case 0:
 813                                 ideapad_check_special_buttons(priv);
 814                                 break;
 815                         default:
 816                                 pr_info("Unknown event: %lu\n", vpc_bit);
 817                         }
 818                 }
 819         }
 820 }
 821
 822 static int ideapad_acpi_add(struct platform_device *pdev)
 823 {
 824         int ret, i;
 825         int cfg;
 826         struct ideapad_private *priv;
 827         struct acpi_device *adev;
 828
 829         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
 830         if (ret)
 831                 return -ENODEV;
 832
 833         if (read_method_int(adev->handle, "_CFG", &cfg))
 834                 return -ENODEV;
 835
 836         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 837         if (!priv)
 838                 return -ENOMEM;
 839
 840         dev_set_drvdata(&pdev->dev, priv);
 841         priv->cfg = cfg;
 842         priv->adev = adev;
 843         priv->platform_device = pdev;
 844
 845         ret = ideapad_sysfs_init(priv);
 846         if (ret)
 847                 goto sysfs_failed;
 848
 849         ret = ideapad_debugfs_init(priv);
 850         if (ret)
 851                 goto debugfs_failed;
 852
 853         ret = ideapad_input_init(priv);
 854         if (ret)
 855                 goto input_failed;
 856
 857         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
 858                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
 859                         ideapad_register_rfkill(priv, i);
 860                 else
 861                         priv->rfk[i] = NULL;
 862         }
 863         ideapad_sync_rfk_state(priv);
 864         ideapad_sync_touchpad_state(priv);
 865
 866         if (!acpi_video_backlight_support()) {
 867                 ret = ideapad_backlight_init(priv);
 868                 if (ret && ret != -ENODEV)
 869                         goto backlight_failed;
 870         }
 871         ret = acpi_install_notify_handler(adev->handle,
 872                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
 873         if (ret)
 874                 goto notification_failed;
 875
 876         return 0;
 877 notification_failed:
 878         ideapad_backlight_exit(priv);
 879 backlight_failed:
 880         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 881                 ideapad_unregister_rfkill(priv, i);
 882         ideapad_input_exit(priv);
 883 input_failed:
 884         ideapad_debugfs_exit(priv);
 885 debugfs_failed:
 886         ideapad_sysfs_exit(priv);
 887 sysfs_failed:
 888         kfree(priv);
 889         return ret;
 890 }
 891
 892 static int ideapad_acpi_remove(struct platform_device *pdev)
 893 {
 894         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
 895         int i;
 896
 897         acpi_remove_notify_handler(priv->adev->handle,
 898                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
 899         ideapad_backlight_exit(priv);
 900         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
 901                 ideapad_unregister_rfkill(priv, i);
 902         ideapad_input_exit(priv);
 903         ideapad_debugfs_exit(priv);
 904         ideapad_sysfs_exit(priv);
 905         dev_set_drvdata(&pdev->dev, NULL);
 906         kfree(priv);
 907
 908         return 0;
 909 }
 910
 911 #ifdef CONFIG_PM_SLEEP
 912 static int ideapad_acpi_resume(struct device *device)
 913 {
 914         struct ideapad_private *priv;
 915
 916         if (!device)
 917                 return -EINVAL;
 918         priv = dev_get_drvdata(device);
 919
 920         ideapad_sync_rfk_state(priv);
 921         ideapad_sync_touchpad_state(priv);
 922         return 0;
 923 }
 924 #endif
 925 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
 926
 927 static const struct acpi_device_id ideapad_device_ids[] = {
 928         { "VPC2004", 0},
 929         { "", 0},
 930 };
 931 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 932
 933 static struct platform_driver ideapad_acpi_driver = {
 934         .probe = ideapad_acpi_add,
 935         .remove = ideapad_acpi_remove,
 936         .driver = {
 937                 .name   = "ideapad_acpi",
 938                 .owner  = THIS_MODULE,
 939                 .pm     = &ideapad_pm,
 940                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
 941         },
 942 };
 943
 944 module_platform_driver(ideapad_acpi_driver);
 945
 946 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 947 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
 948 MODULE_LICENSE("GPL");