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 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 ideapad_register_rfkill(struct acpi_device *adevice, int dev) 472 { 473 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); 474 int ret; 475 unsigned long sw_blocked; 476 477 if (no_bt_rfkill && 478 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) { 479 /* Force to enable bluetooth when no_bt_rfkill=1 */ 480 write_ec_cmd(ideapad_handle, 481 ideapad_rfk_data[dev].opcode, 1); 482 return 0; 483 } 484 485 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev, 486 ideapad_rfk_data[dev].type, &ideapad_rfk_ops, 487 (void *)(long)dev); 488 if (!priv->rfk[dev]) 489 return -ENOMEM; 490 491 if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1, 492 &sw_blocked)) { 493 rfkill_init_sw_state(priv->rfk[dev], 0); 494 } else { 495 sw_blocked = !sw_blocked; 496 rfkill_init_sw_state(priv->rfk[dev], sw_blocked); 497 } 498 499 ret = rfkill_register(priv->rfk[dev]); 500 if (ret) { 501 rfkill_destroy(priv->rfk[dev]); 502 return ret; 503 } 504 return 0; 505 } 506 507 static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev) 508 { 509 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); 510 511 if (!priv->rfk[dev]) 512 return; 513 514 rfkill_unregister(priv->rfk[dev]); 515 rfkill_destroy(priv->rfk[dev]); 516 } 517 518 /* 519 * Platform device 520 */ 521 static int ideapad_platform_init(struct ideapad_private *priv) 522 { 523 int result; 524 525 priv->platform_device = platform_device_alloc("ideapad", -1); 526 if (!priv->platform_device) 527 return -ENOMEM; 528 platform_set_drvdata(priv->platform_device, priv); 529 530 result = platform_device_add(priv->platform_device); 531 if (result) 532 goto fail_platform_device; 533 534 result = sysfs_create_group(&priv->platform_device->dev.kobj, 535 &ideapad_attribute_group); 536 if (result) 537 goto fail_sysfs; 538 return 0; 539 540 fail_sysfs: 541 platform_device_del(priv->platform_device); 542 fail_platform_device: 543 platform_device_put(priv->platform_device); 544 return result; 545 } 546 547 static void ideapad_platform_exit(struct ideapad_private *priv) 548 { 549 sysfs_remove_group(&priv->platform_device->dev.kobj, 550 &ideapad_attribute_group); 551 platform_device_unregister(priv->platform_device); 552 } 553 554 /* 555 * input device 556 */ 557 static const struct key_entry ideapad_keymap[] = { 558 { KE_KEY, 6, { KEY_SWITCHVIDEOMODE } }, 559 { KE_KEY, 7, { KEY_CAMERA } }, 560 { KE_KEY, 11, { KEY_F16 } }, 561 { KE_KEY, 13, { KEY_WLAN } }, 562 { KE_KEY, 16, { KEY_PROG1 } }, 563 { KE_KEY, 17, { KEY_PROG2 } }, 564 { KE_KEY, 64, { KEY_PROG3 } }, 565 { KE_KEY, 65, { KEY_PROG4 } }, 566 { KE_KEY, 66, { KEY_TOUCHPAD_OFF } }, 567 { KE_KEY, 67, { KEY_TOUCHPAD_ON } }, 568 { KE_END, 0 }, 569 }; 570 571 static int ideapad_input_init(struct ideapad_private *priv) 572 { 573 struct input_dev *inputdev; 574 int error; 575 576 inputdev = input_allocate_device(); 577 if (!inputdev) { 578 pr_info("Unable to allocate input device\n"); 579 return -ENOMEM; 580 } 581 582 inputdev->name = "Ideapad extra buttons"; 583 inputdev->phys = "ideapad/input0"; 584 inputdev->id.bustype = BUS_HOST; 585 inputdev->dev.parent = &priv->platform_device->dev; 586 587 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL); 588 if (error) { 589 pr_err("Unable to setup input device keymap\n"); 590 goto err_free_dev; 591 } 592 593 error = input_register_device(inputdev); 594 if (error) { 595 pr_err("Unable to register input device\n"); 596 goto err_free_keymap; 597 } 598 599 priv->inputdev = inputdev; 600 return 0; 601 602 err_free_keymap: 603 sparse_keymap_free(inputdev); 604 err_free_dev: 605 input_free_device(inputdev); 606 return error; 607 } 608 609 static void ideapad_input_exit(struct ideapad_private *priv) 610 { 611 sparse_keymap_free(priv->inputdev); 612 input_unregister_device(priv->inputdev); 613 priv->inputdev = NULL; 614 } 615 616 static void ideapad_input_report(struct ideapad_private *priv, 617 unsigned long scancode) 618 { 619 sparse_keymap_report_event(priv->inputdev, scancode, 1, true); 620 } 621 622 static void ideapad_input_novokey(struct ideapad_private *priv) 623 { 624 unsigned long long_pressed; 625 626 if (read_ec_data(ideapad_handle, VPCCMD_R_NOVO, &long_pressed)) 627 return; 628 if (long_pressed) 629 ideapad_input_report(priv, 17); 630 else 631 ideapad_input_report(priv, 16); 632 } 633 634 static void ideapad_check_special_buttons(struct ideapad_private *priv) 635 { 636 unsigned long bit, value; 637 638 read_ec_data(ideapad_handle, VPCCMD_R_SPECIAL_BUTTONS, &value); 639 640 for (bit = 0; bit < 16; bit++) { 641 if (test_bit(bit, &value)) { 642 switch (bit) { 643 case 6: 644 /* Thermal Management button */ 645 ideapad_input_report(priv, 65); 646 break; 647 case 1: 648 /* OneKey Theater button */ 649 ideapad_input_report(priv, 64); 650 break; 651 } 652 } 653 } 654 } 655 656 /* 657 * backlight 658 */ 659 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev) 660 { 661 unsigned long now; 662 663 if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now)) 664 return -EIO; 665 return now; 666 } 667 668 static int ideapad_backlight_update_status(struct backlight_device *blightdev) 669 { 670 if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL, 671 blightdev->props.brightness)) 672 return -EIO; 673 if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL_POWER, 674 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1)) 675 return -EIO; 676 677 return 0; 678 } 679 680 static const struct backlight_ops ideapad_backlight_ops = { 681 .get_brightness = ideapad_backlight_get_brightness, 682 .update_status = ideapad_backlight_update_status, 683 }; 684 685 static int ideapad_backlight_init(struct ideapad_private *priv) 686 { 687 struct backlight_device *blightdev; 688 struct backlight_properties props; 689 unsigned long max, now, power; 690 691 if (read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &max)) 692 return -EIO; 693 if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now)) 694 return -EIO; 695 if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power)) 696 return -EIO; 697 698 memset(&props, 0, sizeof(struct backlight_properties)); 699 props.max_brightness = max; 700 props.type = BACKLIGHT_PLATFORM; 701 blightdev = backlight_device_register("ideapad", 702 &priv->platform_device->dev, 703 priv, 704 &ideapad_backlight_ops, 705 &props); 706 if (IS_ERR(blightdev)) { 707 pr_err("Could not register backlight device\n"); 708 return PTR_ERR(blightdev); 709 } 710 711 priv->blightdev = blightdev; 712 blightdev->props.brightness = now; 713 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 714 backlight_update_status(blightdev); 715 716 return 0; 717 } 718 719 static void ideapad_backlight_exit(struct ideapad_private *priv) 720 { 721 if (priv->blightdev) 722 backlight_device_unregister(priv->blightdev); 723 priv->blightdev = NULL; 724 } 725 726 static void ideapad_backlight_notify_power(struct ideapad_private *priv) 727 { 728 unsigned long power; 729 struct backlight_device *blightdev = priv->blightdev; 730 731 if (!blightdev) 732 return; 733 if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power)) 734 return; 735 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 736 } 737 738 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv) 739 { 740 unsigned long now; 741 742 /* if we control brightness via acpi video driver */ 743 if (priv->blightdev == NULL) { 744 read_ec_data(ideapad_handle, VPCCMD_R_BL, &now); 745 return; 746 } 747 748 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY); 749 } 750 751 /* 752 * module init/exit 753 */ 754 static const struct acpi_device_id ideapad_device_ids[] = { 755 { "VPC2004", 0}, 756 { "", 0}, 757 }; 758 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids); 759 760 static void ideapad_sync_touchpad_state(struct acpi_device *adevice) 761 { 762 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); 763 unsigned long value; 764 765 /* Without reading from EC touchpad LED doesn't switch state */ 766 if (!read_ec_data(adevice->handle, VPCCMD_R_TOUCHPAD, &value)) { 767 /* Some IdeaPads don't really turn off touchpad - they only 768 * switch the LED state. We (de)activate KBC AUX port to turn 769 * touchpad off and on. We send KEY_TOUCHPAD_OFF and 770 * KEY_TOUCHPAD_ON to not to get out of sync with LED */ 771 unsigned char param; 772 i8042_command(¶m, value ? I8042_CMD_AUX_ENABLE : 773 I8042_CMD_AUX_DISABLE); 774 ideapad_input_report(priv, value ? 67 : 66); 775 } 776 } 777 778 static int ideapad_acpi_add(struct acpi_device *adevice) 779 { 780 int ret, i; 781 int cfg; 782 struct ideapad_private *priv; 783 784 if (read_method_int(adevice->handle, "_CFG", &cfg)) 785 return -ENODEV; 786 787 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 788 if (!priv) 789 return -ENOMEM; 790 dev_set_drvdata(&adevice->dev, priv); 791 ideapad_priv = priv; 792 ideapad_handle = adevice->handle; 793 priv->cfg = cfg; 794 795 ret = ideapad_platform_init(priv); 796 if (ret) 797 goto platform_failed; 798 799 ret = ideapad_debugfs_init(priv); 800 if (ret) 801 goto debugfs_failed; 802 803 ret = ideapad_input_init(priv); 804 if (ret) 805 goto input_failed; 806 807 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) { 808 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg)) 809 ideapad_register_rfkill(adevice, i); 810 else 811 priv->rfk[i] = NULL; 812 } 813 ideapad_sync_rfk_state(priv); 814 ideapad_sync_touchpad_state(adevice); 815 816 if (!acpi_video_backlight_support()) { 817 ret = ideapad_backlight_init(priv); 818 if (ret && ret != -ENODEV) 819 goto backlight_failed; 820 } 821 822 return 0; 823 824 backlight_failed: 825 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 826 ideapad_unregister_rfkill(adevice, i); 827 ideapad_input_exit(priv); 828 input_failed: 829 ideapad_debugfs_exit(priv); 830 debugfs_failed: 831 ideapad_platform_exit(priv); 832 platform_failed: 833 kfree(priv); 834 return ret; 835 } 836 837 static int ideapad_acpi_remove(struct acpi_device *adevice) 838 { 839 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); 840 int i; 841 842 ideapad_backlight_exit(priv); 843 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 844 ideapad_unregister_rfkill(adevice, i); 845 ideapad_input_exit(priv); 846 ideapad_debugfs_exit(priv); 847 ideapad_platform_exit(priv); 848 dev_set_drvdata(&adevice->dev, NULL); 849 kfree(priv); 850 851 return 0; 852 } 853 854 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event) 855 { 856 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev); 857 acpi_handle handle = adevice->handle; 858 unsigned long vpc1, vpc2, vpc_bit; 859 860 if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1)) 861 return; 862 if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2)) 863 return; 864 865 vpc1 = (vpc2 << 8) | vpc1; 866 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) { 867 if (test_bit(vpc_bit, &vpc1)) { 868 switch (vpc_bit) { 869 case 9: 870 ideapad_sync_rfk_state(priv); 871 break; 872 case 13: 873 case 11: 874 case 7: 875 case 6: 876 ideapad_input_report(priv, vpc_bit); 877 break; 878 case 5: 879 ideapad_sync_touchpad_state(adevice); 880 break; 881 case 4: 882 ideapad_backlight_notify_brightness(priv); 883 break; 884 case 3: 885 ideapad_input_novokey(priv); 886 break; 887 case 2: 888 ideapad_backlight_notify_power(priv); 889 break; 890 case 0: 891 ideapad_check_special_buttons(priv); 892 break; 893 default: 894 pr_info("Unknown event: %lu\n", vpc_bit); 895 } 896 } 897 } 898 } 899 900 static int ideapad_acpi_resume(struct device *device) 901 { 902 ideapad_sync_rfk_state(ideapad_priv); 903 ideapad_sync_touchpad_state(to_acpi_device(device)); 904 return 0; 905 } 906 907 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume); 908 909 static struct acpi_driver ideapad_acpi_driver = { 910 .name = "ideapad_acpi", 911 .class = "IdeaPad", 912 .ids = ideapad_device_ids, 913 .ops.add = ideapad_acpi_add, 914 .ops.remove = ideapad_acpi_remove, 915 .ops.notify = ideapad_acpi_notify, 916 .drv.pm = &ideapad_pm, 917 .owner = THIS_MODULE, 918 }; 919 module_acpi_driver(ideapad_acpi_driver); 920 921 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); 922 MODULE_DESCRIPTION("IdeaPad ACPI Extras"); 923 MODULE_LICENSE("GPL"); 924