1 /* 2 * ideapad-laptop.c - Lenovo IdeaPad ACPI Extras 3 * 4 * Copyright © 2010 Intel Corporation 5 * Copyright © 2010 David Woodhouse <dwmw2@infradead.org> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 20 * 02110-1301, USA. 21 */ 22 23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/types.h> 29 #include <linux/acpi.h> 30 #include <linux/rfkill.h> 31 #include <linux/platform_device.h> 32 #include <linux/input.h> 33 #include <linux/input/sparse-keymap.h> 34 #include <linux/backlight.h> 35 #include <linux/fb.h> 36 #include <linux/debugfs.h> 37 #include <linux/seq_file.h> 38 #include <linux/i8042.h> 39 #include <linux/dmi.h> 40 #include <linux/device.h> 41 #include <acpi/video.h> 42 43 #define IDEAPAD_RFKILL_DEV_NUM (3) 44 45 #define CFG_BT_BIT (16) 46 #define CFG_3G_BIT (17) 47 #define CFG_WIFI_BIT (18) 48 #define CFG_CAMERA_BIT (19) 49 50 #if IS_ENABLED(CONFIG_ACPI_WMI) 51 static const char *const ideapad_wmi_fnesc_events[] = { 52 "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */ 53 "56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */ 54 }; 55 #endif 56 57 enum { 58 VPCCMD_R_VPC1 = 0x10, 59 VPCCMD_R_BL_MAX, 60 VPCCMD_R_BL, 61 VPCCMD_W_BL, 62 VPCCMD_R_WIFI, 63 VPCCMD_W_WIFI, 64 VPCCMD_R_BT, 65 VPCCMD_W_BT, 66 VPCCMD_R_BL_POWER, 67 VPCCMD_R_NOVO, 68 VPCCMD_R_VPC2, 69 VPCCMD_R_TOUCHPAD, 70 VPCCMD_W_TOUCHPAD, 71 VPCCMD_R_CAMERA, 72 VPCCMD_W_CAMERA, 73 VPCCMD_R_3G, 74 VPCCMD_W_3G, 75 VPCCMD_R_ODD, /* 0x21 */ 76 VPCCMD_W_FAN, 77 VPCCMD_R_RF, 78 VPCCMD_W_RF, 79 VPCCMD_R_FAN = 0x2B, 80 VPCCMD_R_SPECIAL_BUTTONS = 0x31, 81 VPCCMD_W_BL_POWER = 0x33, 82 }; 83 84 struct ideapad_rfk_priv { 85 int dev; 86 struct ideapad_private *priv; 87 }; 88 89 struct ideapad_private { 90 struct acpi_device *adev; 91 struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM]; 92 struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM]; 93 struct platform_device *platform_device; 94 struct input_dev *inputdev; 95 struct backlight_device *blightdev; 96 struct dentry *debug; 97 unsigned long cfg; 98 bool has_hw_rfkill_switch; 99 const char *fnesc_guid; 100 }; 101 102 static bool no_bt_rfkill; 103 module_param(no_bt_rfkill, bool, 0444); 104 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth."); 105 106 /* 107 * ACPI Helpers 108 */ 109 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */ 110 111 static int read_method_int(acpi_handle handle, const char *method, int *val) 112 { 113 acpi_status status; 114 unsigned long long result; 115 116 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 117 if (ACPI_FAILURE(status)) { 118 *val = -1; 119 return -1; 120 } else { 121 *val = result; 122 return 0; 123 } 124 } 125 126 static int method_vpcr(acpi_handle handle, int cmd, int *ret) 127 { 128 acpi_status status; 129 unsigned long long result; 130 struct acpi_object_list params; 131 union acpi_object in_obj; 132 133 params.count = 1; 134 params.pointer = &in_obj; 135 in_obj.type = ACPI_TYPE_INTEGER; 136 in_obj.integer.value = cmd; 137 138 status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result); 139 140 if (ACPI_FAILURE(status)) { 141 *ret = -1; 142 return -1; 143 } else { 144 *ret = result; 145 return 0; 146 } 147 } 148 149 static int method_vpcw(acpi_handle handle, int cmd, int data) 150 { 151 struct acpi_object_list params; 152 union acpi_object in_obj[2]; 153 acpi_status status; 154 155 params.count = 2; 156 params.pointer = in_obj; 157 in_obj[0].type = ACPI_TYPE_INTEGER; 158 in_obj[0].integer.value = cmd; 159 in_obj[1].type = ACPI_TYPE_INTEGER; 160 in_obj[1].integer.value = data; 161 162 status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL); 163 if (status != AE_OK) 164 return -1; 165 return 0; 166 } 167 168 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data) 169 { 170 int val; 171 unsigned long int end_jiffies; 172 173 if (method_vpcw(handle, 1, cmd)) 174 return -1; 175 176 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1; 177 time_before(jiffies, end_jiffies);) { 178 schedule(); 179 if (method_vpcr(handle, 1, &val)) 180 return -1; 181 if (val == 0) { 182 if (method_vpcr(handle, 0, &val)) 183 return -1; 184 *data = val; 185 return 0; 186 } 187 } 188 pr_err("timeout in read_ec_cmd\n"); 189 return -1; 190 } 191 192 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data) 193 { 194 int val; 195 unsigned long int end_jiffies; 196 197 if (method_vpcw(handle, 0, data)) 198 return -1; 199 if (method_vpcw(handle, 1, cmd)) 200 return -1; 201 202 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1; 203 time_before(jiffies, end_jiffies);) { 204 schedule(); 205 if (method_vpcr(handle, 1, &val)) 206 return -1; 207 if (val == 0) 208 return 0; 209 } 210 pr_err("timeout in write_ec_cmd\n"); 211 return -1; 212 } 213 214 /* 215 * debugfs 216 */ 217 static int debugfs_status_show(struct seq_file *s, void *data) 218 { 219 struct ideapad_private *priv = s->private; 220 unsigned long value; 221 222 if (!priv) 223 return -EINVAL; 224 225 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value)) 226 seq_printf(s, "Backlight max:\t%lu\n", value); 227 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value)) 228 seq_printf(s, "Backlight now:\t%lu\n", value); 229 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value)) 230 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off"); 231 seq_printf(s, "=====================\n"); 232 233 if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value)) 234 seq_printf(s, "Radio status:\t%s(%lu)\n", 235 value ? "On" : "Off", value); 236 if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value)) 237 seq_printf(s, "Wifi status:\t%s(%lu)\n", 238 value ? "On" : "Off", value); 239 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value)) 240 seq_printf(s, "BT status:\t%s(%lu)\n", 241 value ? "On" : "Off", value); 242 if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value)) 243 seq_printf(s, "3G status:\t%s(%lu)\n", 244 value ? "On" : "Off", value); 245 seq_printf(s, "=====================\n"); 246 247 if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) 248 seq_printf(s, "Touchpad status:%s(%lu)\n", 249 value ? "On" : "Off", value); 250 if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value)) 251 seq_printf(s, "Camera status:\t%s(%lu)\n", 252 value ? "On" : "Off", value); 253 254 return 0; 255 } 256 257 static int debugfs_status_open(struct inode *inode, struct file *file) 258 { 259 return single_open(file, debugfs_status_show, inode->i_private); 260 } 261 262 static const struct file_operations debugfs_status_fops = { 263 .owner = THIS_MODULE, 264 .open = debugfs_status_open, 265 .read = seq_read, 266 .llseek = seq_lseek, 267 .release = single_release, 268 }; 269 270 static int debugfs_cfg_show(struct seq_file *s, void *data) 271 { 272 struct ideapad_private *priv = s->private; 273 274 if (!priv) { 275 seq_printf(s, "cfg: N/A\n"); 276 } else { 277 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ", 278 priv->cfg); 279 if (test_bit(CFG_BT_BIT, &priv->cfg)) 280 seq_printf(s, "Bluetooth "); 281 if (test_bit(CFG_3G_BIT, &priv->cfg)) 282 seq_printf(s, "3G "); 283 if (test_bit(CFG_WIFI_BIT, &priv->cfg)) 284 seq_printf(s, "Wireless "); 285 if (test_bit(CFG_CAMERA_BIT, &priv->cfg)) 286 seq_printf(s, "Camera "); 287 seq_printf(s, "\nGraphic: "); 288 switch ((priv->cfg)&0x700) { 289 case 0x100: 290 seq_printf(s, "Intel"); 291 break; 292 case 0x200: 293 seq_printf(s, "ATI"); 294 break; 295 case 0x300: 296 seq_printf(s, "Nvidia"); 297 break; 298 case 0x400: 299 seq_printf(s, "Intel and ATI"); 300 break; 301 case 0x500: 302 seq_printf(s, "Intel and Nvidia"); 303 break; 304 } 305 seq_printf(s, "\n"); 306 } 307 return 0; 308 } 309 310 static int debugfs_cfg_open(struct inode *inode, struct file *file) 311 { 312 return single_open(file, debugfs_cfg_show, inode->i_private); 313 } 314 315 static const struct file_operations debugfs_cfg_fops = { 316 .owner = THIS_MODULE, 317 .open = debugfs_cfg_open, 318 .read = seq_read, 319 .llseek = seq_lseek, 320 .release = single_release, 321 }; 322 323 static int ideapad_debugfs_init(struct ideapad_private *priv) 324 { 325 struct dentry *node; 326 327 priv->debug = debugfs_create_dir("ideapad", NULL); 328 if (priv->debug == NULL) { 329 pr_err("failed to create debugfs directory"); 330 goto errout; 331 } 332 333 node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv, 334 &debugfs_cfg_fops); 335 if (!node) { 336 pr_err("failed to create cfg in debugfs"); 337 goto errout; 338 } 339 340 node = debugfs_create_file("status", S_IRUGO, priv->debug, priv, 341 &debugfs_status_fops); 342 if (!node) { 343 pr_err("failed to create status in debugfs"); 344 goto errout; 345 } 346 347 return 0; 348 349 errout: 350 return -ENOMEM; 351 } 352 353 static void ideapad_debugfs_exit(struct ideapad_private *priv) 354 { 355 debugfs_remove_recursive(priv->debug); 356 priv->debug = NULL; 357 } 358 359 /* 360 * sysfs 361 */ 362 static ssize_t show_ideapad_cam(struct device *dev, 363 struct device_attribute *attr, 364 char *buf) 365 { 366 unsigned long result; 367 struct ideapad_private *priv = dev_get_drvdata(dev); 368 369 if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result)) 370 return sprintf(buf, "-1\n"); 371 return sprintf(buf, "%lu\n", result); 372 } 373 374 static ssize_t store_ideapad_cam(struct device *dev, 375 struct device_attribute *attr, 376 const char *buf, size_t count) 377 { 378 int ret, state; 379 struct ideapad_private *priv = dev_get_drvdata(dev); 380 381 if (!count) 382 return 0; 383 if (sscanf(buf, "%i", &state) != 1) 384 return -EINVAL; 385 ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state); 386 if (ret < 0) 387 return -EIO; 388 return count; 389 } 390 391 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam); 392 393 static ssize_t show_ideapad_fan(struct device *dev, 394 struct device_attribute *attr, 395 char *buf) 396 { 397 unsigned long result; 398 struct ideapad_private *priv = dev_get_drvdata(dev); 399 400 if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result)) 401 return sprintf(buf, "-1\n"); 402 return sprintf(buf, "%lu\n", result); 403 } 404 405 static ssize_t store_ideapad_fan(struct device *dev, 406 struct device_attribute *attr, 407 const char *buf, size_t count) 408 { 409 int ret, state; 410 struct ideapad_private *priv = dev_get_drvdata(dev); 411 412 if (!count) 413 return 0; 414 if (sscanf(buf, "%i", &state) != 1) 415 return -EINVAL; 416 if (state < 0 || state > 4 || state == 3) 417 return -EINVAL; 418 ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state); 419 if (ret < 0) 420 return -EIO; 421 return count; 422 } 423 424 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan); 425 426 static struct attribute *ideapad_attributes[] = { 427 &dev_attr_camera_power.attr, 428 &dev_attr_fan_mode.attr, 429 NULL 430 }; 431 432 static umode_t ideapad_is_visible(struct kobject *kobj, 433 struct attribute *attr, 434 int idx) 435 { 436 struct device *dev = container_of(kobj, struct device, kobj); 437 struct ideapad_private *priv = dev_get_drvdata(dev); 438 bool supported; 439 440 if (attr == &dev_attr_camera_power.attr) 441 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg)); 442 else if (attr == &dev_attr_fan_mode.attr) { 443 unsigned long value; 444 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN, 445 &value); 446 } else 447 supported = true; 448 449 return supported ? attr->mode : 0; 450 } 451 452 static const struct attribute_group ideapad_attribute_group = { 453 .is_visible = ideapad_is_visible, 454 .attrs = ideapad_attributes 455 }; 456 457 /* 458 * Rfkill 459 */ 460 struct ideapad_rfk_data { 461 char *name; 462 int cfgbit; 463 int opcode; 464 int type; 465 }; 466 467 static const struct ideapad_rfk_data ideapad_rfk_data[] = { 468 { "ideapad_wlan", CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN }, 469 { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH }, 470 { "ideapad_3g", CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN }, 471 }; 472 473 static int ideapad_rfk_set(void *data, bool blocked) 474 { 475 struct ideapad_rfk_priv *priv = data; 476 int opcode = ideapad_rfk_data[priv->dev].opcode; 477 478 return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked); 479 } 480 481 static struct rfkill_ops ideapad_rfk_ops = { 482 .set_block = ideapad_rfk_set, 483 }; 484 485 static void ideapad_sync_rfk_state(struct ideapad_private *priv) 486 { 487 unsigned long hw_blocked = 0; 488 int i; 489 490 if (priv->has_hw_rfkill_switch) { 491 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked)) 492 return; 493 hw_blocked = !hw_blocked; 494 } 495 496 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 497 if (priv->rfk[i]) 498 rfkill_set_hw_state(priv->rfk[i], hw_blocked); 499 } 500 501 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev) 502 { 503 int ret; 504 unsigned long sw_blocked; 505 506 if (no_bt_rfkill && 507 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) { 508 /* Force to enable bluetooth when no_bt_rfkill=1 */ 509 write_ec_cmd(priv->adev->handle, 510 ideapad_rfk_data[dev].opcode, 1); 511 return 0; 512 } 513 priv->rfk_priv[dev].dev = dev; 514 priv->rfk_priv[dev].priv = priv; 515 516 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, 517 &priv->platform_device->dev, 518 ideapad_rfk_data[dev].type, 519 &ideapad_rfk_ops, 520 &priv->rfk_priv[dev]); 521 if (!priv->rfk[dev]) 522 return -ENOMEM; 523 524 if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1, 525 &sw_blocked)) { 526 rfkill_init_sw_state(priv->rfk[dev], 0); 527 } else { 528 sw_blocked = !sw_blocked; 529 rfkill_init_sw_state(priv->rfk[dev], sw_blocked); 530 } 531 532 ret = rfkill_register(priv->rfk[dev]); 533 if (ret) { 534 rfkill_destroy(priv->rfk[dev]); 535 return ret; 536 } 537 return 0; 538 } 539 540 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev) 541 { 542 if (!priv->rfk[dev]) 543 return; 544 545 rfkill_unregister(priv->rfk[dev]); 546 rfkill_destroy(priv->rfk[dev]); 547 } 548 549 /* 550 * Platform device 551 */ 552 static int ideapad_sysfs_init(struct ideapad_private *priv) 553 { 554 return sysfs_create_group(&priv->platform_device->dev.kobj, 555 &ideapad_attribute_group); 556 } 557 558 static void ideapad_sysfs_exit(struct ideapad_private *priv) 559 { 560 sysfs_remove_group(&priv->platform_device->dev.kobj, 561 &ideapad_attribute_group); 562 } 563 564 /* 565 * input device 566 */ 567 static const struct key_entry ideapad_keymap[] = { 568 { KE_KEY, 6, { KEY_SWITCHVIDEOMODE } }, 569 { KE_KEY, 7, { KEY_CAMERA } }, 570 { KE_KEY, 8, { KEY_MICMUTE } }, 571 { KE_KEY, 11, { KEY_F16 } }, 572 { KE_KEY, 13, { KEY_WLAN } }, 573 { KE_KEY, 16, { KEY_PROG1 } }, 574 { KE_KEY, 17, { KEY_PROG2 } }, 575 { KE_KEY, 64, { KEY_PROG3 } }, 576 { KE_KEY, 65, { KEY_PROG4 } }, 577 { KE_KEY, 66, { KEY_TOUCHPAD_OFF } }, 578 { KE_KEY, 67, { KEY_TOUCHPAD_ON } }, 579 { KE_KEY, 128, { KEY_ESC } }, 580 581 { KE_END, 0 }, 582 }; 583 584 static int ideapad_input_init(struct ideapad_private *priv) 585 { 586 struct input_dev *inputdev; 587 int error; 588 589 inputdev = input_allocate_device(); 590 if (!inputdev) 591 return -ENOMEM; 592 593 inputdev->name = "Ideapad extra buttons"; 594 inputdev->phys = "ideapad/input0"; 595 inputdev->id.bustype = BUS_HOST; 596 inputdev->dev.parent = &priv->platform_device->dev; 597 598 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL); 599 if (error) { 600 pr_err("Unable to setup input device keymap\n"); 601 goto err_free_dev; 602 } 603 604 error = input_register_device(inputdev); 605 if (error) { 606 pr_err("Unable to register input device\n"); 607 goto err_free_keymap; 608 } 609 610 priv->inputdev = inputdev; 611 return 0; 612 613 err_free_keymap: 614 sparse_keymap_free(inputdev); 615 err_free_dev: 616 input_free_device(inputdev); 617 return error; 618 } 619 620 static void ideapad_input_exit(struct ideapad_private *priv) 621 { 622 sparse_keymap_free(priv->inputdev); 623 input_unregister_device(priv->inputdev); 624 priv->inputdev = NULL; 625 } 626 627 static void ideapad_input_report(struct ideapad_private *priv, 628 unsigned long scancode) 629 { 630 sparse_keymap_report_event(priv->inputdev, scancode, 1, true); 631 } 632 633 static void ideapad_input_novokey(struct ideapad_private *priv) 634 { 635 unsigned long long_pressed; 636 637 if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed)) 638 return; 639 if (long_pressed) 640 ideapad_input_report(priv, 17); 641 else 642 ideapad_input_report(priv, 16); 643 } 644 645 static void ideapad_check_special_buttons(struct ideapad_private *priv) 646 { 647 unsigned long bit, value; 648 649 read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value); 650 651 for (bit = 0; bit < 16; bit++) { 652 if (test_bit(bit, &value)) { 653 switch (bit) { 654 case 0: /* Z580 */ 655 case 6: /* Z570 */ 656 /* Thermal Management button */ 657 ideapad_input_report(priv, 65); 658 break; 659 case 1: 660 /* OneKey Theater button */ 661 ideapad_input_report(priv, 64); 662 break; 663 default: 664 pr_info("Unknown special button: %lu\n", bit); 665 break; 666 } 667 } 668 } 669 } 670 671 /* 672 * backlight 673 */ 674 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev) 675 { 676 struct ideapad_private *priv = bl_get_data(blightdev); 677 unsigned long now; 678 679 if (!priv) 680 return -EINVAL; 681 682 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now)) 683 return -EIO; 684 return now; 685 } 686 687 static int ideapad_backlight_update_status(struct backlight_device *blightdev) 688 { 689 struct ideapad_private *priv = bl_get_data(blightdev); 690 691 if (!priv) 692 return -EINVAL; 693 694 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL, 695 blightdev->props.brightness)) 696 return -EIO; 697 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER, 698 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1)) 699 return -EIO; 700 701 return 0; 702 } 703 704 static const struct backlight_ops ideapad_backlight_ops = { 705 .get_brightness = ideapad_backlight_get_brightness, 706 .update_status = ideapad_backlight_update_status, 707 }; 708 709 static int ideapad_backlight_init(struct ideapad_private *priv) 710 { 711 struct backlight_device *blightdev; 712 struct backlight_properties props; 713 unsigned long max, now, power; 714 715 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max)) 716 return -EIO; 717 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now)) 718 return -EIO; 719 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power)) 720 return -EIO; 721 722 memset(&props, 0, sizeof(struct backlight_properties)); 723 props.max_brightness = max; 724 props.type = BACKLIGHT_PLATFORM; 725 blightdev = backlight_device_register("ideapad", 726 &priv->platform_device->dev, 727 priv, 728 &ideapad_backlight_ops, 729 &props); 730 if (IS_ERR(blightdev)) { 731 pr_err("Could not register backlight device\n"); 732 return PTR_ERR(blightdev); 733 } 734 735 priv->blightdev = blightdev; 736 blightdev->props.brightness = now; 737 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 738 backlight_update_status(blightdev); 739 740 return 0; 741 } 742 743 static void ideapad_backlight_exit(struct ideapad_private *priv) 744 { 745 backlight_device_unregister(priv->blightdev); 746 priv->blightdev = NULL; 747 } 748 749 static void ideapad_backlight_notify_power(struct ideapad_private *priv) 750 { 751 unsigned long power; 752 struct backlight_device *blightdev = priv->blightdev; 753 754 if (!blightdev) 755 return; 756 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power)) 757 return; 758 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 759 } 760 761 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv) 762 { 763 unsigned long now; 764 765 /* if we control brightness via acpi video driver */ 766 if (priv->blightdev == NULL) { 767 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now); 768 return; 769 } 770 771 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY); 772 } 773 774 /* 775 * module init/exit 776 */ 777 static void ideapad_sync_touchpad_state(struct ideapad_private *priv) 778 { 779 unsigned long value; 780 781 /* Without reading from EC touchpad LED doesn't switch state */ 782 if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) { 783 /* Some IdeaPads don't really turn off touchpad - they only 784 * switch the LED state. We (de)activate KBC AUX port to turn 785 * touchpad off and on. We send KEY_TOUCHPAD_OFF and 786 * KEY_TOUCHPAD_ON to not to get out of sync with LED */ 787 unsigned char param; 788 i8042_command(¶m, value ? I8042_CMD_AUX_ENABLE : 789 I8042_CMD_AUX_DISABLE); 790 ideapad_input_report(priv, value ? 67 : 66); 791 } 792 } 793 794 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data) 795 { 796 struct ideapad_private *priv = data; 797 unsigned long vpc1, vpc2, vpc_bit; 798 799 if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1)) 800 return; 801 if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2)) 802 return; 803 804 vpc1 = (vpc2 << 8) | vpc1; 805 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) { 806 if (test_bit(vpc_bit, &vpc1)) { 807 switch (vpc_bit) { 808 case 9: 809 ideapad_sync_rfk_state(priv); 810 break; 811 case 13: 812 case 11: 813 case 8: 814 case 7: 815 case 6: 816 ideapad_input_report(priv, vpc_bit); 817 break; 818 case 5: 819 ideapad_sync_touchpad_state(priv); 820 break; 821 case 4: 822 ideapad_backlight_notify_brightness(priv); 823 break; 824 case 3: 825 ideapad_input_novokey(priv); 826 break; 827 case 2: 828 ideapad_backlight_notify_power(priv); 829 break; 830 case 0: 831 ideapad_check_special_buttons(priv); 832 break; 833 default: 834 pr_info("Unknown event: %lu\n", vpc_bit); 835 } 836 } 837 } 838 } 839 840 #if IS_ENABLED(CONFIG_ACPI_WMI) 841 static void ideapad_wmi_notify(u32 value, void *context) 842 { 843 switch (value) { 844 case 128: 845 ideapad_input_report(context, value); 846 break; 847 default: 848 pr_info("Unknown WMI event %u\n", value); 849 } 850 } 851 #endif 852 853 /* 854 * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF 855 * always results in 0 on these models, causing ideapad_laptop to wrongly 856 * report all radios as hardware-blocked. 857 */ 858 static const struct dmi_system_id no_hw_rfkill_list[] = { 859 { 860 .ident = "Lenovo G40-30", 861 .matches = { 862 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 863 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"), 864 }, 865 }, 866 { 867 .ident = "Lenovo G50-30", 868 .matches = { 869 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 870 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"), 871 }, 872 }, 873 { 874 .ident = "Lenovo ideapad Y700-15ISK", 875 .matches = { 876 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 877 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"), 878 }, 879 }, 880 { 881 .ident = "Lenovo ideapad Y700 Touch-15ISK", 882 .matches = { 883 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 884 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"), 885 }, 886 }, 887 { 888 .ident = "Lenovo ideapad Y700-17ISK", 889 .matches = { 890 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 891 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"), 892 }, 893 }, 894 { 895 .ident = "Lenovo Yoga 2 11 / 13 / Pro", 896 .matches = { 897 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 898 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"), 899 }, 900 }, 901 { 902 .ident = "Lenovo Yoga 2 11 / 13 / Pro", 903 .matches = { 904 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 905 DMI_MATCH(DMI_BOARD_NAME, "Yoga2"), 906 }, 907 }, 908 { 909 .ident = "Lenovo Yoga 3 1170 / 1470", 910 .matches = { 911 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 912 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3"), 913 }, 914 }, 915 { 916 .ident = "Lenovo Yoga 3 Pro 1370", 917 .matches = { 918 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 919 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"), 920 }, 921 }, 922 { 923 .ident = "Lenovo Yoga 700", 924 .matches = { 925 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 926 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"), 927 }, 928 }, 929 { 930 .ident = "Lenovo Yoga 900", 931 .matches = { 932 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 933 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"), 934 }, 935 }, 936 {} 937 }; 938 939 static int ideapad_acpi_add(struct platform_device *pdev) 940 { 941 int ret, i; 942 int cfg; 943 struct ideapad_private *priv; 944 struct acpi_device *adev; 945 946 ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev); 947 if (ret) 948 return -ENODEV; 949 950 if (read_method_int(adev->handle, "_CFG", &cfg)) 951 return -ENODEV; 952 953 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 954 if (!priv) 955 return -ENOMEM; 956 957 dev_set_drvdata(&pdev->dev, priv); 958 priv->cfg = cfg; 959 priv->adev = adev; 960 priv->platform_device = pdev; 961 priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list); 962 963 ret = ideapad_sysfs_init(priv); 964 if (ret) 965 return ret; 966 967 ret = ideapad_debugfs_init(priv); 968 if (ret) 969 goto debugfs_failed; 970 971 ret = ideapad_input_init(priv); 972 if (ret) 973 goto input_failed; 974 975 /* 976 * On some models without a hw-switch (the yoga 2 13 at least) 977 * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work. 978 */ 979 if (!priv->has_hw_rfkill_switch) 980 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1); 981 982 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 983 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg)) 984 ideapad_register_rfkill(priv, i); 985 986 ideapad_sync_rfk_state(priv); 987 ideapad_sync_touchpad_state(priv); 988 989 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) { 990 ret = ideapad_backlight_init(priv); 991 if (ret && ret != -ENODEV) 992 goto backlight_failed; 993 } 994 ret = acpi_install_notify_handler(adev->handle, 995 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv); 996 if (ret) 997 goto notification_failed; 998 999 #if IS_ENABLED(CONFIG_ACPI_WMI) 1000 for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) { 1001 ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i], 1002 ideapad_wmi_notify, priv); 1003 if (ret == AE_OK) { 1004 priv->fnesc_guid = ideapad_wmi_fnesc_events[i]; 1005 break; 1006 } 1007 } 1008 if (ret != AE_OK && ret != AE_NOT_EXIST) 1009 goto notification_failed_wmi; 1010 #endif 1011 1012 return 0; 1013 #if IS_ENABLED(CONFIG_ACPI_WMI) 1014 notification_failed_wmi: 1015 acpi_remove_notify_handler(priv->adev->handle, 1016 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify); 1017 #endif 1018 notification_failed: 1019 ideapad_backlight_exit(priv); 1020 backlight_failed: 1021 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 1022 ideapad_unregister_rfkill(priv, i); 1023 ideapad_input_exit(priv); 1024 input_failed: 1025 ideapad_debugfs_exit(priv); 1026 debugfs_failed: 1027 ideapad_sysfs_exit(priv); 1028 return ret; 1029 } 1030 1031 static int ideapad_acpi_remove(struct platform_device *pdev) 1032 { 1033 struct ideapad_private *priv = dev_get_drvdata(&pdev->dev); 1034 int i; 1035 1036 #if IS_ENABLED(CONFIG_ACPI_WMI) 1037 if (priv->fnesc_guid) 1038 wmi_remove_notify_handler(priv->fnesc_guid); 1039 #endif 1040 acpi_remove_notify_handler(priv->adev->handle, 1041 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify); 1042 ideapad_backlight_exit(priv); 1043 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 1044 ideapad_unregister_rfkill(priv, i); 1045 ideapad_input_exit(priv); 1046 ideapad_debugfs_exit(priv); 1047 ideapad_sysfs_exit(priv); 1048 dev_set_drvdata(&pdev->dev, NULL); 1049 1050 return 0; 1051 } 1052 1053 #ifdef CONFIG_PM_SLEEP 1054 static int ideapad_acpi_resume(struct device *device) 1055 { 1056 struct ideapad_private *priv; 1057 1058 if (!device) 1059 return -EINVAL; 1060 priv = dev_get_drvdata(device); 1061 1062 ideapad_sync_rfk_state(priv); 1063 ideapad_sync_touchpad_state(priv); 1064 return 0; 1065 } 1066 #endif 1067 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume); 1068 1069 static const struct acpi_device_id ideapad_device_ids[] = { 1070 { "VPC2004", 0}, 1071 { "", 0}, 1072 }; 1073 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids); 1074 1075 static struct platform_driver ideapad_acpi_driver = { 1076 .probe = ideapad_acpi_add, 1077 .remove = ideapad_acpi_remove, 1078 .driver = { 1079 .name = "ideapad_acpi", 1080 .pm = &ideapad_pm, 1081 .acpi_match_table = ACPI_PTR(ideapad_device_ids), 1082 }, 1083 }; 1084 1085 module_platform_driver(ideapad_acpi_driver); 1086 1087 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); 1088 MODULE_DESCRIPTION("IdeaPad ACPI Extras"); 1089 MODULE_LICENSE("GPL"); 1090