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_rfk_priv { 76 int dev; 77 struct ideapad_private *priv; 78 }; 79 80 struct ideapad_private { 81 struct acpi_device *adev; 82 struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM]; 83 struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM]; 84 struct platform_device *platform_device; 85 struct input_dev *inputdev; 86 struct backlight_device *blightdev; 87 struct dentry *debug; 88 unsigned long cfg; 89 }; 90 91 static bool no_bt_rfkill; 92 module_param(no_bt_rfkill, bool, 0444); 93 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth."); 94 95 /* 96 * ACPI Helpers 97 */ 98 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */ 99 100 static int read_method_int(acpi_handle handle, const char *method, int *val) 101 { 102 acpi_status status; 103 unsigned long long result; 104 105 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 106 if (ACPI_FAILURE(status)) { 107 *val = -1; 108 return -1; 109 } else { 110 *val = result; 111 return 0; 112 } 113 } 114 115 static int method_vpcr(acpi_handle handle, int cmd, int *ret) 116 { 117 acpi_status status; 118 unsigned long long result; 119 struct acpi_object_list params; 120 union acpi_object in_obj; 121 122 params.count = 1; 123 params.pointer = &in_obj; 124 in_obj.type = ACPI_TYPE_INTEGER; 125 in_obj.integer.value = cmd; 126 127 status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result); 128 129 if (ACPI_FAILURE(status)) { 130 *ret = -1; 131 return -1; 132 } else { 133 *ret = result; 134 return 0; 135 } 136 } 137 138 static int method_vpcw(acpi_handle handle, int cmd, int data) 139 { 140 struct acpi_object_list params; 141 union acpi_object in_obj[2]; 142 acpi_status status; 143 144 params.count = 2; 145 params.pointer = in_obj; 146 in_obj[0].type = ACPI_TYPE_INTEGER; 147 in_obj[0].integer.value = cmd; 148 in_obj[1].type = ACPI_TYPE_INTEGER; 149 in_obj[1].integer.value = data; 150 151 status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL); 152 if (status != AE_OK) 153 return -1; 154 return 0; 155 } 156 157 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data) 158 { 159 int val; 160 unsigned long int end_jiffies; 161 162 if (method_vpcw(handle, 1, cmd)) 163 return -1; 164 165 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1; 166 time_before(jiffies, end_jiffies);) { 167 schedule(); 168 if (method_vpcr(handle, 1, &val)) 169 return -1; 170 if (val == 0) { 171 if (method_vpcr(handle, 0, &val)) 172 return -1; 173 *data = val; 174 return 0; 175 } 176 } 177 pr_err("timeout in read_ec_cmd\n"); 178 return -1; 179 } 180 181 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data) 182 { 183 int val; 184 unsigned long int end_jiffies; 185 186 if (method_vpcw(handle, 0, data)) 187 return -1; 188 if (method_vpcw(handle, 1, cmd)) 189 return -1; 190 191 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1; 192 time_before(jiffies, end_jiffies);) { 193 schedule(); 194 if (method_vpcr(handle, 1, &val)) 195 return -1; 196 if (val == 0) 197 return 0; 198 } 199 pr_err("timeout in write_ec_cmd\n"); 200 return -1; 201 } 202 203 /* 204 * debugfs 205 */ 206 static int debugfs_status_show(struct seq_file *s, void *data) 207 { 208 struct ideapad_private *priv = s->private; 209 unsigned long value; 210 211 if (!priv) 212 return -EINVAL; 213 214 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value)) 215 seq_printf(s, "Backlight max:\t%lu\n", value); 216 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value)) 217 seq_printf(s, "Backlight now:\t%lu\n", value); 218 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value)) 219 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off"); 220 seq_printf(s, "=====================\n"); 221 222 if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value)) 223 seq_printf(s, "Radio status:\t%s(%lu)\n", 224 value ? "On" : "Off", value); 225 if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value)) 226 seq_printf(s, "Wifi status:\t%s(%lu)\n", 227 value ? "On" : "Off", value); 228 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value)) 229 seq_printf(s, "BT status:\t%s(%lu)\n", 230 value ? "On" : "Off", value); 231 if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value)) 232 seq_printf(s, "3G status:\t%s(%lu)\n", 233 value ? "On" : "Off", value); 234 seq_printf(s, "=====================\n"); 235 236 if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) 237 seq_printf(s, "Touchpad status:%s(%lu)\n", 238 value ? "On" : "Off", value); 239 if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value)) 240 seq_printf(s, "Camera status:\t%s(%lu)\n", 241 value ? "On" : "Off", value); 242 243 return 0; 244 } 245 246 static int debugfs_status_open(struct inode *inode, struct file *file) 247 { 248 return single_open(file, debugfs_status_show, inode->i_private); 249 } 250 251 static const struct file_operations debugfs_status_fops = { 252 .owner = THIS_MODULE, 253 .open = debugfs_status_open, 254 .read = seq_read, 255 .llseek = seq_lseek, 256 .release = single_release, 257 }; 258 259 static int debugfs_cfg_show(struct seq_file *s, void *data) 260 { 261 struct ideapad_private *priv = s->private; 262 263 if (!priv) { 264 seq_printf(s, "cfg: N/A\n"); 265 } else { 266 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ", 267 priv->cfg); 268 if (test_bit(CFG_BT_BIT, &priv->cfg)) 269 seq_printf(s, "Bluetooth "); 270 if (test_bit(CFG_3G_BIT, &priv->cfg)) 271 seq_printf(s, "3G "); 272 if (test_bit(CFG_WIFI_BIT, &priv->cfg)) 273 seq_printf(s, "Wireless "); 274 if (test_bit(CFG_CAMERA_BIT, &priv->cfg)) 275 seq_printf(s, "Camera "); 276 seq_printf(s, "\nGraphic: "); 277 switch ((priv->cfg)&0x700) { 278 case 0x100: 279 seq_printf(s, "Intel"); 280 break; 281 case 0x200: 282 seq_printf(s, "ATI"); 283 break; 284 case 0x300: 285 seq_printf(s, "Nvidia"); 286 break; 287 case 0x400: 288 seq_printf(s, "Intel and ATI"); 289 break; 290 case 0x500: 291 seq_printf(s, "Intel and Nvidia"); 292 break; 293 } 294 seq_printf(s, "\n"); 295 } 296 return 0; 297 } 298 299 static int debugfs_cfg_open(struct inode *inode, struct file *file) 300 { 301 return single_open(file, debugfs_cfg_show, inode->i_private); 302 } 303 304 static const struct file_operations debugfs_cfg_fops = { 305 .owner = THIS_MODULE, 306 .open = debugfs_cfg_open, 307 .read = seq_read, 308 .llseek = seq_lseek, 309 .release = single_release, 310 }; 311 312 static int ideapad_debugfs_init(struct ideapad_private *priv) 313 { 314 struct dentry *node; 315 316 priv->debug = debugfs_create_dir("ideapad", NULL); 317 if (priv->debug == NULL) { 318 pr_err("failed to create debugfs directory"); 319 goto errout; 320 } 321 322 node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv, 323 &debugfs_cfg_fops); 324 if (!node) { 325 pr_err("failed to create cfg in debugfs"); 326 goto errout; 327 } 328 329 node = debugfs_create_file("status", S_IRUGO, priv->debug, priv, 330 &debugfs_status_fops); 331 if (!node) { 332 pr_err("failed to create status in debugfs"); 333 goto errout; 334 } 335 336 return 0; 337 338 errout: 339 return -ENOMEM; 340 } 341 342 static void ideapad_debugfs_exit(struct ideapad_private *priv) 343 { 344 debugfs_remove_recursive(priv->debug); 345 priv->debug = NULL; 346 } 347 348 /* 349 * sysfs 350 */ 351 static ssize_t show_ideapad_cam(struct device *dev, 352 struct device_attribute *attr, 353 char *buf) 354 { 355 unsigned long result; 356 struct ideapad_private *priv = dev_get_drvdata(dev); 357 358 if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result)) 359 return sprintf(buf, "-1\n"); 360 return sprintf(buf, "%lu\n", result); 361 } 362 363 static ssize_t store_ideapad_cam(struct device *dev, 364 struct device_attribute *attr, 365 const char *buf, size_t count) 366 { 367 int ret, state; 368 struct ideapad_private *priv = dev_get_drvdata(dev); 369 370 if (!count) 371 return 0; 372 if (sscanf(buf, "%i", &state) != 1) 373 return -EINVAL; 374 ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state); 375 if (ret < 0) 376 return -EIO; 377 return count; 378 } 379 380 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam); 381 382 static ssize_t show_ideapad_fan(struct device *dev, 383 struct device_attribute *attr, 384 char *buf) 385 { 386 unsigned long result; 387 struct ideapad_private *priv = dev_get_drvdata(dev); 388 389 if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result)) 390 return sprintf(buf, "-1\n"); 391 return sprintf(buf, "%lu\n", result); 392 } 393 394 static ssize_t store_ideapad_fan(struct device *dev, 395 struct device_attribute *attr, 396 const char *buf, size_t count) 397 { 398 int ret, state; 399 struct ideapad_private *priv = dev_get_drvdata(dev); 400 401 if (!count) 402 return 0; 403 if (sscanf(buf, "%i", &state) != 1) 404 return -EINVAL; 405 if (state < 0 || state > 4 || state == 3) 406 return -EINVAL; 407 ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state); 408 if (ret < 0) 409 return -EIO; 410 return count; 411 } 412 413 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan); 414 415 static struct attribute *ideapad_attributes[] = { 416 &dev_attr_camera_power.attr, 417 &dev_attr_fan_mode.attr, 418 NULL 419 }; 420 421 static umode_t ideapad_is_visible(struct kobject *kobj, 422 struct attribute *attr, 423 int idx) 424 { 425 struct device *dev = container_of(kobj, struct device, kobj); 426 struct ideapad_private *priv = dev_get_drvdata(dev); 427 bool supported; 428 429 if (attr == &dev_attr_camera_power.attr) 430 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg)); 431 else if (attr == &dev_attr_fan_mode.attr) { 432 unsigned long value; 433 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN, 434 &value); 435 } else 436 supported = true; 437 438 return supported ? attr->mode : 0; 439 } 440 441 static struct attribute_group ideapad_attribute_group = { 442 .is_visible = ideapad_is_visible, 443 .attrs = ideapad_attributes 444 }; 445 446 /* 447 * Rfkill 448 */ 449 struct ideapad_rfk_data { 450 char *name; 451 int cfgbit; 452 int opcode; 453 int type; 454 }; 455 456 const struct ideapad_rfk_data ideapad_rfk_data[] = { 457 { "ideapad_wlan", CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN }, 458 { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH }, 459 { "ideapad_3g", CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN }, 460 }; 461 462 static int ideapad_rfk_set(void *data, bool blocked) 463 { 464 struct ideapad_rfk_priv *priv = data; 465 466 return write_ec_cmd(priv->priv->adev->handle, priv->dev, !blocked); 467 } 468 469 static struct rfkill_ops ideapad_rfk_ops = { 470 .set_block = ideapad_rfk_set, 471 }; 472 473 static void ideapad_sync_rfk_state(struct ideapad_private *priv) 474 { 475 unsigned long hw_blocked; 476 int i; 477 478 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked)) 479 return; 480 hw_blocked = !hw_blocked; 481 482 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 483 if (priv->rfk[i]) 484 rfkill_set_hw_state(priv->rfk[i], hw_blocked); 485 } 486 487 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev) 488 { 489 int ret; 490 unsigned long sw_blocked; 491 492 if (no_bt_rfkill && 493 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) { 494 /* Force to enable bluetooth when no_bt_rfkill=1 */ 495 write_ec_cmd(priv->adev->handle, 496 ideapad_rfk_data[dev].opcode, 1); 497 return 0; 498 } 499 priv->rfk_priv[dev].dev = dev; 500 priv->rfk_priv[dev].priv = priv; 501 502 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, 503 &priv->platform_device->dev, 504 ideapad_rfk_data[dev].type, 505 &ideapad_rfk_ops, 506 &priv->rfk_priv[dev]); 507 if (!priv->rfk[dev]) 508 return -ENOMEM; 509 510 if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1, 511 &sw_blocked)) { 512 rfkill_init_sw_state(priv->rfk[dev], 0); 513 } else { 514 sw_blocked = !sw_blocked; 515 rfkill_init_sw_state(priv->rfk[dev], sw_blocked); 516 } 517 518 ret = rfkill_register(priv->rfk[dev]); 519 if (ret) { 520 rfkill_destroy(priv->rfk[dev]); 521 return ret; 522 } 523 return 0; 524 } 525 526 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev) 527 { 528 if (!priv->rfk[dev]) 529 return; 530 531 rfkill_unregister(priv->rfk[dev]); 532 rfkill_destroy(priv->rfk[dev]); 533 } 534 535 /* 536 * Platform device 537 */ 538 static int ideapad_sysfs_init(struct ideapad_private *priv) 539 { 540 return sysfs_create_group(&priv->platform_device->dev.kobj, 541 &ideapad_attribute_group); 542 } 543 544 static void ideapad_sysfs_exit(struct ideapad_private *priv) 545 { 546 sysfs_remove_group(&priv->platform_device->dev.kobj, 547 &ideapad_attribute_group); 548 } 549 550 /* 551 * input device 552 */ 553 static const struct key_entry ideapad_keymap[] = { 554 { KE_KEY, 6, { KEY_SWITCHVIDEOMODE } }, 555 { KE_KEY, 7, { KEY_CAMERA } }, 556 { KE_KEY, 11, { KEY_F16 } }, 557 { KE_KEY, 13, { KEY_WLAN } }, 558 { KE_KEY, 16, { KEY_PROG1 } }, 559 { KE_KEY, 17, { KEY_PROG2 } }, 560 { KE_KEY, 64, { KEY_PROG3 } }, 561 { KE_KEY, 65, { KEY_PROG4 } }, 562 { KE_KEY, 66, { KEY_TOUCHPAD_OFF } }, 563 { KE_KEY, 67, { KEY_TOUCHPAD_ON } }, 564 { KE_END, 0 }, 565 }; 566 567 static int ideapad_input_init(struct ideapad_private *priv) 568 { 569 struct input_dev *inputdev; 570 int error; 571 572 inputdev = input_allocate_device(); 573 if (!inputdev) { 574 pr_info("Unable to allocate input device\n"); 575 return -ENOMEM; 576 } 577 578 inputdev->name = "Ideapad extra buttons"; 579 inputdev->phys = "ideapad/input0"; 580 inputdev->id.bustype = BUS_HOST; 581 inputdev->dev.parent = &priv->platform_device->dev; 582 583 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL); 584 if (error) { 585 pr_err("Unable to setup input device keymap\n"); 586 goto err_free_dev; 587 } 588 589 error = input_register_device(inputdev); 590 if (error) { 591 pr_err("Unable to register input device\n"); 592 goto err_free_keymap; 593 } 594 595 priv->inputdev = inputdev; 596 return 0; 597 598 err_free_keymap: 599 sparse_keymap_free(inputdev); 600 err_free_dev: 601 input_free_device(inputdev); 602 return error; 603 } 604 605 static void ideapad_input_exit(struct ideapad_private *priv) 606 { 607 sparse_keymap_free(priv->inputdev); 608 input_unregister_device(priv->inputdev); 609 priv->inputdev = NULL; 610 } 611 612 static void ideapad_input_report(struct ideapad_private *priv, 613 unsigned long scancode) 614 { 615 sparse_keymap_report_event(priv->inputdev, scancode, 1, true); 616 } 617 618 static void ideapad_input_novokey(struct ideapad_private *priv) 619 { 620 unsigned long long_pressed; 621 622 if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed)) 623 return; 624 if (long_pressed) 625 ideapad_input_report(priv, 17); 626 else 627 ideapad_input_report(priv, 16); 628 } 629 630 static void ideapad_check_special_buttons(struct ideapad_private *priv) 631 { 632 unsigned long bit, value; 633 634 read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value); 635 636 for (bit = 0; bit < 16; bit++) { 637 if (test_bit(bit, &value)) { 638 switch (bit) { 639 case 0: /* Z580 */ 640 case 6: /* Z570 */ 641 /* Thermal Management button */ 642 ideapad_input_report(priv, 65); 643 break; 644 case 1: 645 /* OneKey Theater button */ 646 ideapad_input_report(priv, 64); 647 break; 648 default: 649 pr_info("Unknown special button: %lu\n", bit); 650 break; 651 } 652 } 653 } 654 } 655 656 /* 657 * backlight 658 */ 659 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev) 660 { 661 struct ideapad_private *priv = bl_get_data(blightdev); 662 unsigned long now; 663 664 if (!priv) 665 return -EINVAL; 666 667 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now)) 668 return -EIO; 669 return now; 670 } 671 672 static int ideapad_backlight_update_status(struct backlight_device *blightdev) 673 { 674 struct ideapad_private *priv = bl_get_data(blightdev); 675 676 if (!priv) 677 return -EINVAL; 678 679 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL, 680 blightdev->props.brightness)) 681 return -EIO; 682 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER, 683 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1)) 684 return -EIO; 685 686 return 0; 687 } 688 689 static const struct backlight_ops ideapad_backlight_ops = { 690 .get_brightness = ideapad_backlight_get_brightness, 691 .update_status = ideapad_backlight_update_status, 692 }; 693 694 static int ideapad_backlight_init(struct ideapad_private *priv) 695 { 696 struct backlight_device *blightdev; 697 struct backlight_properties props; 698 unsigned long max, now, power; 699 700 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max)) 701 return -EIO; 702 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now)) 703 return -EIO; 704 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power)) 705 return -EIO; 706 707 memset(&props, 0, sizeof(struct backlight_properties)); 708 props.max_brightness = max; 709 props.type = BACKLIGHT_PLATFORM; 710 blightdev = backlight_device_register("ideapad", 711 &priv->platform_device->dev, 712 priv, 713 &ideapad_backlight_ops, 714 &props); 715 if (IS_ERR(blightdev)) { 716 pr_err("Could not register backlight device\n"); 717 return PTR_ERR(blightdev); 718 } 719 720 priv->blightdev = blightdev; 721 blightdev->props.brightness = now; 722 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 723 backlight_update_status(blightdev); 724 725 return 0; 726 } 727 728 static void ideapad_backlight_exit(struct ideapad_private *priv) 729 { 730 if (priv->blightdev) 731 backlight_device_unregister(priv->blightdev); 732 priv->blightdev = NULL; 733 } 734 735 static void ideapad_backlight_notify_power(struct ideapad_private *priv) 736 { 737 unsigned long power; 738 struct backlight_device *blightdev = priv->blightdev; 739 740 if (!blightdev) 741 return; 742 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power)) 743 return; 744 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 745 } 746 747 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv) 748 { 749 unsigned long now; 750 751 /* if we control brightness via acpi video driver */ 752 if (priv->blightdev == NULL) { 753 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now); 754 return; 755 } 756 757 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY); 758 } 759 760 /* 761 * module init/exit 762 */ 763 static void ideapad_sync_touchpad_state(struct ideapad_private *priv) 764 { 765 unsigned long value; 766 767 /* Without reading from EC touchpad LED doesn't switch state */ 768 if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) { 769 /* Some IdeaPads don't really turn off touchpad - they only 770 * switch the LED state. We (de)activate KBC AUX port to turn 771 * touchpad off and on. We send KEY_TOUCHPAD_OFF and 772 * KEY_TOUCHPAD_ON to not to get out of sync with LED */ 773 unsigned char param; 774 i8042_command(¶m, value ? I8042_CMD_AUX_ENABLE : 775 I8042_CMD_AUX_DISABLE); 776 ideapad_input_report(priv, value ? 67 : 66); 777 } 778 } 779 780 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data) 781 { 782 struct ideapad_private *priv = data; 783 unsigned long vpc1, vpc2, vpc_bit; 784 785 if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1)) 786 return; 787 if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2)) 788 return; 789 790 vpc1 = (vpc2 << 8) | vpc1; 791 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) { 792 if (test_bit(vpc_bit, &vpc1)) { 793 switch (vpc_bit) { 794 case 9: 795 ideapad_sync_rfk_state(priv); 796 break; 797 case 13: 798 case 11: 799 case 7: 800 case 6: 801 ideapad_input_report(priv, vpc_bit); 802 break; 803 case 5: 804 ideapad_sync_touchpad_state(priv); 805 break; 806 case 4: 807 ideapad_backlight_notify_brightness(priv); 808 break; 809 case 3: 810 ideapad_input_novokey(priv); 811 break; 812 case 2: 813 ideapad_backlight_notify_power(priv); 814 break; 815 case 0: 816 ideapad_check_special_buttons(priv); 817 break; 818 default: 819 pr_info("Unknown event: %lu\n", vpc_bit); 820 } 821 } 822 } 823 } 824 825 static int ideapad_acpi_add(struct platform_device *pdev) 826 { 827 int ret, i; 828 int cfg; 829 struct ideapad_private *priv; 830 struct acpi_device *adev; 831 832 ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev); 833 if (ret) 834 return -ENODEV; 835 836 if (read_method_int(adev->handle, "_CFG", &cfg)) 837 return -ENODEV; 838 839 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 840 if (!priv) 841 return -ENOMEM; 842 843 dev_set_drvdata(&pdev->dev, priv); 844 priv->cfg = cfg; 845 priv->adev = adev; 846 priv->platform_device = pdev; 847 848 ret = ideapad_sysfs_init(priv); 849 if (ret) 850 goto sysfs_failed; 851 852 ret = ideapad_debugfs_init(priv); 853 if (ret) 854 goto debugfs_failed; 855 856 ret = ideapad_input_init(priv); 857 if (ret) 858 goto input_failed; 859 860 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) { 861 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg)) 862 ideapad_register_rfkill(priv, i); 863 else 864 priv->rfk[i] = NULL; 865 } 866 ideapad_sync_rfk_state(priv); 867 ideapad_sync_touchpad_state(priv); 868 869 if (!acpi_video_backlight_support()) { 870 ret = ideapad_backlight_init(priv); 871 if (ret && ret != -ENODEV) 872 goto backlight_failed; 873 } 874 ret = acpi_install_notify_handler(adev->handle, 875 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv); 876 if (ret) 877 goto notification_failed; 878 879 return 0; 880 notification_failed: 881 ideapad_backlight_exit(priv); 882 backlight_failed: 883 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 884 ideapad_unregister_rfkill(priv, i); 885 ideapad_input_exit(priv); 886 input_failed: 887 ideapad_debugfs_exit(priv); 888 debugfs_failed: 889 ideapad_sysfs_exit(priv); 890 sysfs_failed: 891 kfree(priv); 892 return ret; 893 } 894 895 static int ideapad_acpi_remove(struct platform_device *pdev) 896 { 897 struct ideapad_private *priv = dev_get_drvdata(&pdev->dev); 898 int i; 899 900 acpi_remove_notify_handler(priv->adev->handle, 901 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify); 902 ideapad_backlight_exit(priv); 903 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 904 ideapad_unregister_rfkill(priv, i); 905 ideapad_input_exit(priv); 906 ideapad_debugfs_exit(priv); 907 ideapad_sysfs_exit(priv); 908 dev_set_drvdata(&pdev->dev, NULL); 909 kfree(priv); 910 911 return 0; 912 } 913 914 #ifdef CONFIG_PM_SLEEP 915 static int ideapad_acpi_resume(struct device *device) 916 { 917 struct ideapad_private *priv; 918 919 if (!device) 920 return -EINVAL; 921 priv = dev_get_drvdata(device); 922 923 ideapad_sync_rfk_state(priv); 924 ideapad_sync_touchpad_state(priv); 925 return 0; 926 } 927 #endif 928 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume); 929 930 static const struct acpi_device_id ideapad_device_ids[] = { 931 { "VPC2004", 0}, 932 { "", 0}, 933 }; 934 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids); 935 936 static struct platform_driver ideapad_acpi_driver = { 937 .probe = ideapad_acpi_add, 938 .remove = ideapad_acpi_remove, 939 .driver = { 940 .name = "ideapad_acpi", 941 .owner = THIS_MODULE, 942 .pm = &ideapad_pm, 943 .acpi_match_table = ACPI_PTR(ideapad_device_ids), 944 }, 945 }; 946 947 module_platform_driver(ideapad_acpi_driver); 948 949 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); 950 MODULE_DESCRIPTION("IdeaPad ACPI Extras"); 951 MODULE_LICENSE("GPL"); 952