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, 11, { KEY_F16 } }, 571 { KE_KEY, 13, { KEY_WLAN } }, 572 { KE_KEY, 16, { KEY_PROG1 } }, 573 { KE_KEY, 17, { KEY_PROG2 } }, 574 { KE_KEY, 64, { KEY_PROG3 } }, 575 { KE_KEY, 65, { KEY_PROG4 } }, 576 { KE_KEY, 66, { KEY_TOUCHPAD_OFF } }, 577 { KE_KEY, 67, { KEY_TOUCHPAD_ON } }, 578 { KE_KEY, 128, { KEY_ESC } }, 579 580 { KE_END, 0 }, 581 }; 582 583 static int ideapad_input_init(struct ideapad_private *priv) 584 { 585 struct input_dev *inputdev; 586 int error; 587 588 inputdev = input_allocate_device(); 589 if (!inputdev) 590 return -ENOMEM; 591 592 inputdev->name = "Ideapad extra buttons"; 593 inputdev->phys = "ideapad/input0"; 594 inputdev->id.bustype = BUS_HOST; 595 inputdev->dev.parent = &priv->platform_device->dev; 596 597 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL); 598 if (error) { 599 pr_err("Unable to setup input device keymap\n"); 600 goto err_free_dev; 601 } 602 603 error = input_register_device(inputdev); 604 if (error) { 605 pr_err("Unable to register input device\n"); 606 goto err_free_keymap; 607 } 608 609 priv->inputdev = inputdev; 610 return 0; 611 612 err_free_keymap: 613 sparse_keymap_free(inputdev); 614 err_free_dev: 615 input_free_device(inputdev); 616 return error; 617 } 618 619 static void ideapad_input_exit(struct ideapad_private *priv) 620 { 621 sparse_keymap_free(priv->inputdev); 622 input_unregister_device(priv->inputdev); 623 priv->inputdev = NULL; 624 } 625 626 static void ideapad_input_report(struct ideapad_private *priv, 627 unsigned long scancode) 628 { 629 sparse_keymap_report_event(priv->inputdev, scancode, 1, true); 630 } 631 632 static void ideapad_input_novokey(struct ideapad_private *priv) 633 { 634 unsigned long long_pressed; 635 636 if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed)) 637 return; 638 if (long_pressed) 639 ideapad_input_report(priv, 17); 640 else 641 ideapad_input_report(priv, 16); 642 } 643 644 static void ideapad_check_special_buttons(struct ideapad_private *priv) 645 { 646 unsigned long bit, value; 647 648 read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value); 649 650 for (bit = 0; bit < 16; bit++) { 651 if (test_bit(bit, &value)) { 652 switch (bit) { 653 case 0: /* Z580 */ 654 case 6: /* Z570 */ 655 /* Thermal Management button */ 656 ideapad_input_report(priv, 65); 657 break; 658 case 1: 659 /* OneKey Theater button */ 660 ideapad_input_report(priv, 64); 661 break; 662 default: 663 pr_info("Unknown special button: %lu\n", bit); 664 break; 665 } 666 } 667 } 668 } 669 670 /* 671 * backlight 672 */ 673 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev) 674 { 675 struct ideapad_private *priv = bl_get_data(blightdev); 676 unsigned long now; 677 678 if (!priv) 679 return -EINVAL; 680 681 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now)) 682 return -EIO; 683 return now; 684 } 685 686 static int ideapad_backlight_update_status(struct backlight_device *blightdev) 687 { 688 struct ideapad_private *priv = bl_get_data(blightdev); 689 690 if (!priv) 691 return -EINVAL; 692 693 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL, 694 blightdev->props.brightness)) 695 return -EIO; 696 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER, 697 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1)) 698 return -EIO; 699 700 return 0; 701 } 702 703 static const struct backlight_ops ideapad_backlight_ops = { 704 .get_brightness = ideapad_backlight_get_brightness, 705 .update_status = ideapad_backlight_update_status, 706 }; 707 708 static int ideapad_backlight_init(struct ideapad_private *priv) 709 { 710 struct backlight_device *blightdev; 711 struct backlight_properties props; 712 unsigned long max, now, power; 713 714 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max)) 715 return -EIO; 716 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now)) 717 return -EIO; 718 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power)) 719 return -EIO; 720 721 memset(&props, 0, sizeof(struct backlight_properties)); 722 props.max_brightness = max; 723 props.type = BACKLIGHT_PLATFORM; 724 blightdev = backlight_device_register("ideapad", 725 &priv->platform_device->dev, 726 priv, 727 &ideapad_backlight_ops, 728 &props); 729 if (IS_ERR(blightdev)) { 730 pr_err("Could not register backlight device\n"); 731 return PTR_ERR(blightdev); 732 } 733 734 priv->blightdev = blightdev; 735 blightdev->props.brightness = now; 736 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 737 backlight_update_status(blightdev); 738 739 return 0; 740 } 741 742 static void ideapad_backlight_exit(struct ideapad_private *priv) 743 { 744 backlight_device_unregister(priv->blightdev); 745 priv->blightdev = NULL; 746 } 747 748 static void ideapad_backlight_notify_power(struct ideapad_private *priv) 749 { 750 unsigned long power; 751 struct backlight_device *blightdev = priv->blightdev; 752 753 if (!blightdev) 754 return; 755 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power)) 756 return; 757 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 758 } 759 760 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv) 761 { 762 unsigned long now; 763 764 /* if we control brightness via acpi video driver */ 765 if (priv->blightdev == NULL) { 766 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now); 767 return; 768 } 769 770 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY); 771 } 772 773 /* 774 * module init/exit 775 */ 776 static void ideapad_sync_touchpad_state(struct ideapad_private *priv) 777 { 778 unsigned long value; 779 780 /* Without reading from EC touchpad LED doesn't switch state */ 781 if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) { 782 /* Some IdeaPads don't really turn off touchpad - they only 783 * switch the LED state. We (de)activate KBC AUX port to turn 784 * touchpad off and on. We send KEY_TOUCHPAD_OFF and 785 * KEY_TOUCHPAD_ON to not to get out of sync with LED */ 786 unsigned char param; 787 i8042_command(¶m, value ? I8042_CMD_AUX_ENABLE : 788 I8042_CMD_AUX_DISABLE); 789 ideapad_input_report(priv, value ? 67 : 66); 790 } 791 } 792 793 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data) 794 { 795 struct ideapad_private *priv = data; 796 unsigned long vpc1, vpc2, vpc_bit; 797 798 if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1)) 799 return; 800 if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2)) 801 return; 802 803 vpc1 = (vpc2 << 8) | vpc1; 804 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) { 805 if (test_bit(vpc_bit, &vpc1)) { 806 switch (vpc_bit) { 807 case 9: 808 ideapad_sync_rfk_state(priv); 809 break; 810 case 13: 811 case 11: 812 case 7: 813 case 6: 814 ideapad_input_report(priv, vpc_bit); 815 break; 816 case 5: 817 ideapad_sync_touchpad_state(priv); 818 break; 819 case 4: 820 ideapad_backlight_notify_brightness(priv); 821 break; 822 case 3: 823 ideapad_input_novokey(priv); 824 break; 825 case 2: 826 ideapad_backlight_notify_power(priv); 827 break; 828 case 0: 829 ideapad_check_special_buttons(priv); 830 break; 831 default: 832 pr_info("Unknown event: %lu\n", vpc_bit); 833 } 834 } 835 } 836 } 837 838 #if IS_ENABLED(CONFIG_ACPI_WMI) 839 static void ideapad_wmi_notify(u32 value, void *context) 840 { 841 switch (value) { 842 case 128: 843 ideapad_input_report(context, value); 844 break; 845 default: 846 pr_info("Unknown WMI event %u\n", value); 847 } 848 } 849 #endif 850 851 /* 852 * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF 853 * always results in 0 on these models, causing ideapad_laptop to wrongly 854 * report all radios as hardware-blocked. 855 */ 856 static const struct dmi_system_id no_hw_rfkill_list[] = { 857 { 858 .ident = "Lenovo G40-30", 859 .matches = { 860 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 861 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"), 862 }, 863 }, 864 { 865 .ident = "Lenovo G50-30", 866 .matches = { 867 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 868 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"), 869 }, 870 }, 871 { 872 .ident = "Lenovo ideapad Y700-15ISK", 873 .matches = { 874 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 875 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"), 876 }, 877 }, 878 { 879 .ident = "Lenovo ideapad Y700 Touch-15ISK", 880 .matches = { 881 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 882 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"), 883 }, 884 }, 885 { 886 .ident = "Lenovo ideapad Y700-17ISK", 887 .matches = { 888 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 889 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"), 890 }, 891 }, 892 { 893 .ident = "Lenovo Yoga 2 11 / 13 / Pro", 894 .matches = { 895 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 896 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"), 897 }, 898 }, 899 { 900 .ident = "Lenovo Yoga 2 11 / 13 / Pro", 901 .matches = { 902 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 903 DMI_MATCH(DMI_BOARD_NAME, "Yoga2"), 904 }, 905 }, 906 { 907 .ident = "Lenovo Yoga 3 1170 / 1470", 908 .matches = { 909 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 910 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3"), 911 }, 912 }, 913 { 914 .ident = "Lenovo Yoga 3 Pro 1370", 915 .matches = { 916 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 917 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"), 918 }, 919 }, 920 { 921 .ident = "Lenovo Yoga 700", 922 .matches = { 923 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 924 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"), 925 }, 926 }, 927 { 928 .ident = "Lenovo Yoga 900", 929 .matches = { 930 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 931 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"), 932 }, 933 }, 934 {} 935 }; 936 937 static int ideapad_acpi_add(struct platform_device *pdev) 938 { 939 int ret, i; 940 int cfg; 941 struct ideapad_private *priv; 942 struct acpi_device *adev; 943 944 ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev); 945 if (ret) 946 return -ENODEV; 947 948 if (read_method_int(adev->handle, "_CFG", &cfg)) 949 return -ENODEV; 950 951 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 952 if (!priv) 953 return -ENOMEM; 954 955 dev_set_drvdata(&pdev->dev, priv); 956 priv->cfg = cfg; 957 priv->adev = adev; 958 priv->platform_device = pdev; 959 priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list); 960 961 ret = ideapad_sysfs_init(priv); 962 if (ret) 963 return ret; 964 965 ret = ideapad_debugfs_init(priv); 966 if (ret) 967 goto debugfs_failed; 968 969 ret = ideapad_input_init(priv); 970 if (ret) 971 goto input_failed; 972 973 /* 974 * On some models without a hw-switch (the yoga 2 13 at least) 975 * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work. 976 */ 977 if (!priv->has_hw_rfkill_switch) 978 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1); 979 980 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 981 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg)) 982 ideapad_register_rfkill(priv, i); 983 984 ideapad_sync_rfk_state(priv); 985 ideapad_sync_touchpad_state(priv); 986 987 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) { 988 ret = ideapad_backlight_init(priv); 989 if (ret && ret != -ENODEV) 990 goto backlight_failed; 991 } 992 ret = acpi_install_notify_handler(adev->handle, 993 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv); 994 if (ret) 995 goto notification_failed; 996 997 #if IS_ENABLED(CONFIG_ACPI_WMI) 998 for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) { 999 ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i], 1000 ideapad_wmi_notify, priv); 1001 if (ret == AE_OK) { 1002 priv->fnesc_guid = ideapad_wmi_fnesc_events[i]; 1003 break; 1004 } 1005 } 1006 if (ret != AE_OK && ret != AE_NOT_EXIST) 1007 goto notification_failed_wmi; 1008 #endif 1009 1010 return 0; 1011 #if IS_ENABLED(CONFIG_ACPI_WMI) 1012 notification_failed_wmi: 1013 acpi_remove_notify_handler(priv->adev->handle, 1014 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify); 1015 #endif 1016 notification_failed: 1017 ideapad_backlight_exit(priv); 1018 backlight_failed: 1019 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 1020 ideapad_unregister_rfkill(priv, i); 1021 ideapad_input_exit(priv); 1022 input_failed: 1023 ideapad_debugfs_exit(priv); 1024 debugfs_failed: 1025 ideapad_sysfs_exit(priv); 1026 return ret; 1027 } 1028 1029 static int ideapad_acpi_remove(struct platform_device *pdev) 1030 { 1031 struct ideapad_private *priv = dev_get_drvdata(&pdev->dev); 1032 int i; 1033 1034 #if IS_ENABLED(CONFIG_ACPI_WMI) 1035 if (priv->fnesc_guid) 1036 wmi_remove_notify_handler(priv->fnesc_guid); 1037 #endif 1038 acpi_remove_notify_handler(priv->adev->handle, 1039 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify); 1040 ideapad_backlight_exit(priv); 1041 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) 1042 ideapad_unregister_rfkill(priv, i); 1043 ideapad_input_exit(priv); 1044 ideapad_debugfs_exit(priv); 1045 ideapad_sysfs_exit(priv); 1046 dev_set_drvdata(&pdev->dev, NULL); 1047 1048 return 0; 1049 } 1050 1051 #ifdef CONFIG_PM_SLEEP 1052 static int ideapad_acpi_resume(struct device *device) 1053 { 1054 struct ideapad_private *priv; 1055 1056 if (!device) 1057 return -EINVAL; 1058 priv = dev_get_drvdata(device); 1059 1060 ideapad_sync_rfk_state(priv); 1061 ideapad_sync_touchpad_state(priv); 1062 return 0; 1063 } 1064 #endif 1065 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume); 1066 1067 static const struct acpi_device_id ideapad_device_ids[] = { 1068 { "VPC2004", 0}, 1069 { "", 0}, 1070 }; 1071 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids); 1072 1073 static struct platform_driver ideapad_acpi_driver = { 1074 .probe = ideapad_acpi_add, 1075 .remove = ideapad_acpi_remove, 1076 .driver = { 1077 .name = "ideapad_acpi", 1078 .pm = &ideapad_pm, 1079 .acpi_match_table = ACPI_PTR(ideapad_device_ids), 1080 }, 1081 }; 1082 1083 module_platform_driver(ideapad_acpi_driver); 1084 1085 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); 1086 MODULE_DESCRIPTION("IdeaPad ACPI Extras"); 1087 MODULE_LICENSE("GPL"); 1088