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