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