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 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/types.h>
  27 #include <acpi/acpi_bus.h>
  28 #include <acpi/acpi_drivers.h>
  29 #include <linux/rfkill.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/input.h>
  32 #include <linux/input/sparse-keymap.h>
  33
  34 #define IDEAPAD_DEV_CAMERA      0
  35 #define IDEAPAD_DEV_WLAN        1
  36 #define IDEAPAD_DEV_BLUETOOTH   2
  37 #define IDEAPAD_DEV_3G          3
  38 #define IDEAPAD_DEV_KILLSW      4
  39
  40 struct ideapad_private {
  41         acpi_handle handle;
  42         struct rfkill *rfk[5];
  43         struct platform_device *platform_device;
  44         struct input_dev *inputdev;
  45 } *ideapad_priv;
  46
  47 static struct {
  48         char *name;
  49         int cfgbit;
  50         int opcode;
  51         int type;
  52 } ideapad_rfk_data[] = {
  53         { "ideapad_camera",     19, 0x1E, NUM_RFKILL_TYPES },
  54         { "ideapad_wlan",       18, 0x15, RFKILL_TYPE_WLAN },
  55         { "ideapad_bluetooth",  16, 0x17, RFKILL_TYPE_BLUETOOTH },
  56         { "ideapad_3g",         17, 0x20, RFKILL_TYPE_WWAN },
  57         { "ideapad_killsw",     0,  0,    RFKILL_TYPE_WLAN }
  58 };
  59
  60 static bool no_bt_rfkill;
  61 module_param(no_bt_rfkill, bool, 0444);
  62 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
  63
  64 /*
  65  * ACPI Helpers
  66  */
  67 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
  68
  69 static int read_method_int(acpi_handle handle, const char *method, int *val)
  70 {
  71         acpi_status status;
  72         unsigned long long result;
  73
  74         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
  75         if (ACPI_FAILURE(status)) {
  76                 *val = -1;
  77                 return -1;
  78         } else {
  79                 *val = result;
  80                 return 0;
  81         }
  82 }
  83
  84 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
  85 {
  86         acpi_status status;
  87         unsigned long long result;
  88         struct acpi_object_list params;
  89         union acpi_object in_obj;
  90
  91         params.count = 1;
  92         params.pointer = &in_obj;
  93         in_obj.type = ACPI_TYPE_INTEGER;
  94         in_obj.integer.value = cmd;
  95
  96         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
  97
  98         if (ACPI_FAILURE(status)) {
  99                 *ret = -1;
 100                 return -1;
 101         } else {
 102                 *ret = result;
 103                 return 0;
 104         }
 105 }
 106
 107 static int method_vpcw(acpi_handle handle, int cmd, int data)
 108 {
 109         struct acpi_object_list params;
 110         union acpi_object in_obj[2];
 111         acpi_status status;
 112
 113         params.count = 2;
 114         params.pointer = in_obj;
 115         in_obj[0].type = ACPI_TYPE_INTEGER;
 116         in_obj[0].integer.value = cmd;
 117         in_obj[1].type = ACPI_TYPE_INTEGER;
 118         in_obj[1].integer.value = data;
 119
 120         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
 121         if (status != AE_OK)
 122                 return -1;
 123         return 0;
 124 }
 125
 126 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
 127 {
 128         int val;
 129         unsigned long int end_jiffies;
 130
 131         if (method_vpcw(handle, 1, cmd))
 132                 return -1;
 133
 134         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 135              time_before(jiffies, end_jiffies);) {
 136                 schedule();
 137                 if (method_vpcr(handle, 1, &val))
 138                         return -1;
 139                 if (val == 0) {
 140                         if (method_vpcr(handle, 0, &val))
 141                                 return -1;
 142                         *data = val;
 143                         return 0;
 144                 }
 145         }
 146         pr_err("timeout in read_ec_cmd\n");
 147         return -1;
 148 }
 149
 150 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 151 {
 152         int val;
 153         unsigned long int end_jiffies;
 154
 155         if (method_vpcw(handle, 0, data))
 156                 return -1;
 157         if (method_vpcw(handle, 1, cmd))
 158                 return -1;
 159
 160         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
 161              time_before(jiffies, end_jiffies);) {
 162                 schedule();
 163                 if (method_vpcr(handle, 1, &val))
 164                         return -1;
 165                 if (val == 0)
 166                         return 0;
 167         }
 168         pr_err("timeout in write_ec_cmd\n");
 169         return -1;
 170 }
 171
 172 /*
 173  * camera power
 174  */
 175 static ssize_t show_ideapad_cam(struct device *dev,
 176                                 struct device_attribute *attr,
 177                                 char *buf)
 178 {
 179         struct ideapad_private *priv = dev_get_drvdata(dev);
 180         acpi_handle handle = priv->handle;
 181         unsigned long result;
 182
 183         if (read_ec_data(handle, 0x1D, &result))
 184                 return sprintf(buf, "-1\n");
 185         return sprintf(buf, "%lu\n", result);
 186 }
 187
 188 static ssize_t store_ideapad_cam(struct device *dev,
 189                                  struct device_attribute *attr,
 190                                  const char *buf, size_t count)
 191 {
 192         struct ideapad_private *priv = dev_get_drvdata(dev);
 193         acpi_handle handle = priv->handle;
 194         int ret, state;
 195
 196         if (!count)
 197                 return 0;
 198         if (sscanf(buf, "%i", &state) != 1)
 199                 return -EINVAL;
 200         ret = write_ec_cmd(handle, 0x1E, state);
 201         if (ret < 0)
 202                 return ret;
 203         return count;
 204 }
 205
 206 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 207
 208 /*
 209  * Rfkill
 210  */
 211 static int ideapad_rfk_set(void *data, bool blocked)
 212 {
 213         int device = (unsigned long)data;
 214
 215         if (device == IDEAPAD_DEV_KILLSW)
 216                 return -EINVAL;
 217
 218         return write_ec_cmd(ideapad_priv->handle,
 219                             ideapad_rfk_data[device].opcode,
 220                             !blocked);
 221 }
 222
 223 static struct rfkill_ops ideapad_rfk_ops = {
 224         .set_block = ideapad_rfk_set,
 225 };
 226
 227 static void ideapad_sync_rfk_state(struct acpi_device *adevice)
 228 {
 229         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 230         acpi_handle handle = priv->handle;
 231         unsigned long hw_blocked;
 232         int i;
 233
 234         if (read_ec_data(handle, 0x23, &hw_blocked))
 235                 return;
 236         hw_blocked = !hw_blocked;
 237
 238         for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
 239                 if (priv->rfk[i])
 240                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 241 }
 242
 243 static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
 244                                              int dev)
 245 {
 246         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 247         int ret;
 248         unsigned long sw_blocked;
 249
 250         if (no_bt_rfkill &&
 251             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
 252                 /* Force to enable bluetooth when no_bt_rfkill=1 */
 253                 write_ec_cmd(ideapad_priv->handle,
 254                              ideapad_rfk_data[dev].opcode, 1);
 255                 return 0;
 256         }
 257
 258         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
 259                                       ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
 260                                       (void *)(long)dev);
 261         if (!priv->rfk[dev])
 262                 return -ENOMEM;
 263
 264         if (read_ec_data(ideapad_priv->handle, ideapad_rfk_data[dev].opcode-1,
 265                          &sw_blocked)) {
 266                 rfkill_init_sw_state(priv->rfk[dev], 0);
 267         } else {
 268                 sw_blocked = !sw_blocked;
 269                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
 270         }
 271
 272         ret = rfkill_register(priv->rfk[dev]);
 273         if (ret) {
 274                 rfkill_destroy(priv->rfk[dev]);
 275                 return ret;
 276         }
 277         return 0;
 278 }
 279
 280 static void __devexit ideapad_unregister_rfkill(struct acpi_device *adevice,
 281                                                 int dev)
 282 {
 283         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 284
 285         if (!priv->rfk[dev])
 286                 return;
 287
 288         rfkill_unregister(priv->rfk[dev]);
 289         rfkill_destroy(priv->rfk[dev]);
 290 }
 291
 292 /*
 293  * Platform device
 294  */
 295 static struct attribute *ideapad_attributes[] = {
 296         &dev_attr_camera_power.attr,
 297         NULL
 298 };
 299
 300 static struct attribute_group ideapad_attribute_group = {
 301         .attrs = ideapad_attributes
 302 };
 303
 304 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
 305 {
 306         int result;
 307
 308         priv->platform_device = platform_device_alloc("ideapad", -1);
 309         if (!priv->platform_device)
 310                 return -ENOMEM;
 311         platform_set_drvdata(priv->platform_device, priv);
 312
 313         result = platform_device_add(priv->platform_device);
 314         if (result)
 315                 goto fail_platform_device;
 316
 317         result = sysfs_create_group(&priv->platform_device->dev.kobj,
 318                                     &ideapad_attribute_group);
 319         if (result)
 320                 goto fail_sysfs;
 321         return 0;
 322
 323 fail_sysfs:
 324         platform_device_del(priv->platform_device);
 325 fail_platform_device:
 326         platform_device_put(priv->platform_device);
 327         return result;
 328 }
 329
 330 static void ideapad_platform_exit(struct ideapad_private *priv)
 331 {
 332         sysfs_remove_group(&priv->platform_device->dev.kobj,
 333                            &ideapad_attribute_group);
 334         platform_device_unregister(priv->platform_device);
 335 }
 336
 337 /*
 338  * input device
 339  */
 340 static const struct key_entry ideapad_keymap[] = {
 341         { KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
 342         { KE_KEY, 0x0D, { KEY_WLAN } },
 343         { KE_END, 0 },
 344 };
 345
 346 static int __devinit ideapad_input_init(struct ideapad_private *priv)
 347 {
 348         struct input_dev *inputdev;
 349         int error;
 350
 351         inputdev = input_allocate_device();
 352         if (!inputdev) {
 353                 pr_info("Unable to allocate input device\n");
 354                 return -ENOMEM;
 355         }
 356
 357         inputdev->name = "Ideapad extra buttons";
 358         inputdev->phys = "ideapad/input0";
 359         inputdev->id.bustype = BUS_HOST;
 360         inputdev->dev.parent = &priv->platform_device->dev;
 361
 362         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
 363         if (error) {
 364                 pr_err("Unable to setup input device keymap\n");
 365                 goto err_free_dev;
 366         }
 367
 368         error = input_register_device(inputdev);
 369         if (error) {
 370                 pr_err("Unable to register input device\n");
 371                 goto err_free_keymap;
 372         }
 373
 374         priv->inputdev = inputdev;
 375         return 0;
 376
 377 err_free_keymap:
 378         sparse_keymap_free(inputdev);
 379 err_free_dev:
 380         input_free_device(inputdev);
 381         return error;
 382 }
 383
 384 static void __devexit ideapad_input_exit(struct ideapad_private *priv)
 385 {
 386         sparse_keymap_free(priv->inputdev);
 387         input_unregister_device(priv->inputdev);
 388         priv->inputdev = NULL;
 389 }
 390
 391 static void ideapad_input_report(struct ideapad_private *priv,
 392                                  unsigned long scancode)
 393 {
 394         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
 395 }
 396
 397 /*
 398  * module init/exit
 399  */
 400 static const struct acpi_device_id ideapad_device_ids[] = {
 401         { "VPC2004", 0},
 402         { "", 0},
 403 };
 404 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 405
 406 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
 407 {
 408         int ret, i, cfg;
 409         struct ideapad_private *priv;
 410
 411         if (read_method_int(adevice->handle, "_CFG", &cfg))
 412                 return -ENODEV;
 413
 414         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 415         if (!priv)
 416                 return -ENOMEM;
 417         ideapad_priv = priv;
 418         priv->handle = adevice->handle;
 419         dev_set_drvdata(&adevice->dev, priv);
 420
 421         ret = ideapad_platform_init(priv);
 422         if (ret)
 423                 goto platform_failed;
 424
 425         ret = ideapad_input_init(priv);
 426         if (ret)
 427                 goto input_failed;
 428
 429         for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++) {
 430                 if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
 431                         ideapad_register_rfkill(adevice, i);
 432         }
 433         ideapad_sync_rfk_state(adevice);
 434
 435         return 0;
 436
 437 input_failed:
 438         ideapad_platform_exit(priv);
 439 platform_failed:
 440         kfree(priv);
 441         return ret;
 442 }
 443
 444 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
 445 {
 446         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 447         int i;
 448
 449         for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
 450                 ideapad_unregister_rfkill(adevice, i);
 451         ideapad_input_exit(priv);
 452         ideapad_platform_exit(priv);
 453         dev_set_drvdata(&adevice->dev, NULL);
 454         kfree(priv);
 455
 456         return 0;
 457 }
 458
 459 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
 460 {
 461         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 462         acpi_handle handle = adevice->handle;
 463         unsigned long vpc1, vpc2, vpc_bit;
 464
 465         if (read_ec_data(handle, 0x10, &vpc1))
 466                 return;
 467         if (read_ec_data(handle, 0x1A, &vpc2))
 468                 return;
 469
 470         vpc1 = (vpc2 << 8) | vpc1;
 471         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
 472                 if (test_bit(vpc_bit, &vpc1)) {
 473                         if (vpc_bit == 9)
 474                                 ideapad_sync_rfk_state(adevice);
 475                         else
 476                                 ideapad_input_report(priv, vpc_bit);
 477                 }
 478         }
 479 }
 480
 481 static struct acpi_driver ideapad_acpi_driver = {
 482         .name = "ideapad_acpi",
 483         .class = "IdeaPad",
 484         .ids = ideapad_device_ids,
 485         .ops.add = ideapad_acpi_add,
 486         .ops.remove = ideapad_acpi_remove,
 487         .ops.notify = ideapad_acpi_notify,
 488         .owner = THIS_MODULE,
 489 };
 490
 491 static int __init ideapad_acpi_module_init(void)
 492 {
 493         return acpi_bus_register_driver(&ideapad_acpi_driver);
 494 }
 495
 496 static void __exit ideapad_acpi_module_exit(void)
 497 {
 498         acpi_bus_unregister_driver(&ideapad_acpi_driver);
 499 }
 500
 501 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 502 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
 503 MODULE_LICENSE("GPL");
 504
 505 module_init(ideapad_acpi_module_init);
 506 module_exit(ideapad_acpi_module_exit);