1 /* 2 * eeepc-laptop.c - Asus Eee PC extras 3 * 4 * Based on asus_acpi.c as patched for the Eee PC by Asus: 5 * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar 6 * Based on eee.c from eeepc-linux 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 20 21 #include <linux/kernel.h> 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/types.h> 25 #include <linux/platform_device.h> 26 #include <linux/backlight.h> 27 #include <linux/fb.h> 28 #include <linux/hwmon.h> 29 #include <linux/hwmon-sysfs.h> 30 #include <linux/slab.h> 31 #include <linux/acpi.h> 32 #include <linux/uaccess.h> 33 #include <linux/input.h> 34 #include <linux/input/sparse-keymap.h> 35 #include <linux/rfkill.h> 36 #include <linux/pci.h> 37 #include <linux/pci_hotplug.h> 38 #include <linux/leds.h> 39 #include <linux/dmi.h> 40 #include <acpi/video.h> 41 42 #define EEEPC_LAPTOP_VERSION "0.1" 43 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver" 44 #define EEEPC_LAPTOP_FILE "eeepc" 45 46 #define EEEPC_ACPI_CLASS "hotkey" 47 #define EEEPC_ACPI_DEVICE_NAME "Hotkey" 48 #define EEEPC_ACPI_HID "ASUS010" 49 50 MODULE_AUTHOR("Corentin Chary, Eric Cooper"); 51 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME); 52 MODULE_LICENSE("GPL"); 53 54 static bool hotplug_disabled; 55 56 module_param(hotplug_disabled, bool, 0444); 57 MODULE_PARM_DESC(hotplug_disabled, 58 "Disable hotplug for wireless device. " 59 "If your laptop need that, please report to " 60 "acpi4asus-user@lists.sourceforge.net."); 61 62 /* 63 * Definitions for Asus EeePC 64 */ 65 #define NOTIFY_BRN_MIN 0x20 66 #define NOTIFY_BRN_MAX 0x2f 67 68 enum { 69 DISABLE_ASL_WLAN = 0x0001, 70 DISABLE_ASL_BLUETOOTH = 0x0002, 71 DISABLE_ASL_IRDA = 0x0004, 72 DISABLE_ASL_CAMERA = 0x0008, 73 DISABLE_ASL_TV = 0x0010, 74 DISABLE_ASL_GPS = 0x0020, 75 DISABLE_ASL_DISPLAYSWITCH = 0x0040, 76 DISABLE_ASL_MODEM = 0x0080, 77 DISABLE_ASL_CARDREADER = 0x0100, 78 DISABLE_ASL_3G = 0x0200, 79 DISABLE_ASL_WIMAX = 0x0400, 80 DISABLE_ASL_HWCF = 0x0800 81 }; 82 83 enum { 84 CM_ASL_WLAN = 0, 85 CM_ASL_BLUETOOTH, 86 CM_ASL_IRDA, 87 CM_ASL_1394, 88 CM_ASL_CAMERA, 89 CM_ASL_TV, 90 CM_ASL_GPS, 91 CM_ASL_DVDROM, 92 CM_ASL_DISPLAYSWITCH, 93 CM_ASL_PANELBRIGHT, 94 CM_ASL_BIOSFLASH, 95 CM_ASL_ACPIFLASH, 96 CM_ASL_CPUFV, 97 CM_ASL_CPUTEMPERATURE, 98 CM_ASL_FANCPU, 99 CM_ASL_FANCHASSIS, 100 CM_ASL_USBPORT1, 101 CM_ASL_USBPORT2, 102 CM_ASL_USBPORT3, 103 CM_ASL_MODEM, 104 CM_ASL_CARDREADER, 105 CM_ASL_3G, 106 CM_ASL_WIMAX, 107 CM_ASL_HWCF, 108 CM_ASL_LID, 109 CM_ASL_TYPE, 110 CM_ASL_PANELPOWER, /*P901*/ 111 CM_ASL_TPD 112 }; 113 114 static const char *cm_getv[] = { 115 "WLDG", "BTHG", NULL, NULL, 116 "CAMG", NULL, NULL, NULL, 117 NULL, "PBLG", NULL, NULL, 118 "CFVG", NULL, NULL, NULL, 119 "USBG", NULL, NULL, "MODG", 120 "CRDG", "M3GG", "WIMG", "HWCF", 121 "LIDG", "TYPE", "PBPG", "TPDG" 122 }; 123 124 static const char *cm_setv[] = { 125 "WLDS", "BTHS", NULL, NULL, 126 "CAMS", NULL, NULL, NULL, 127 "SDSP", "PBLS", "HDPS", NULL, 128 "CFVS", NULL, NULL, NULL, 129 "USBG", NULL, NULL, "MODS", 130 "CRDS", "M3GS", "WIMS", NULL, 131 NULL, NULL, "PBPS", "TPDS" 132 }; 133 134 static const struct key_entry eeepc_keymap[] = { 135 { KE_KEY, 0x10, { KEY_WLAN } }, 136 { KE_KEY, 0x11, { KEY_WLAN } }, 137 { KE_KEY, 0x12, { KEY_PROG1 } }, 138 { KE_KEY, 0x13, { KEY_MUTE } }, 139 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } }, 140 { KE_KEY, 0x15, { KEY_VOLUMEUP } }, 141 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } }, 142 { KE_KEY, 0x1a, { KEY_COFFEE } }, 143 { KE_KEY, 0x1b, { KEY_ZOOM } }, 144 { KE_KEY, 0x1c, { KEY_PROG2 } }, 145 { KE_KEY, 0x1d, { KEY_PROG3 } }, 146 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } }, 147 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } }, 148 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } }, 149 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } }, 150 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } }, 151 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */ 152 { KE_KEY, 0x38, { KEY_F14 } }, 153 { KE_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */ 154 { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */ 155 { KE_END, 0 }, 156 }; 157 158 /* 159 * This is the main structure, we can use it to store useful information 160 */ 161 struct eeepc_laptop { 162 acpi_handle handle; /* the handle of the acpi device */ 163 u32 cm_supported; /* the control methods supported 164 by this BIOS */ 165 bool cpufv_disabled; 166 bool hotplug_disabled; 167 u16 event_count[128]; /* count for each event */ 168 169 struct platform_device *platform_device; 170 struct acpi_device *device; /* the device we are in */ 171 struct backlight_device *backlight_device; 172 173 struct input_dev *inputdev; 174 175 struct rfkill *wlan_rfkill; 176 struct rfkill *bluetooth_rfkill; 177 struct rfkill *wwan3g_rfkill; 178 struct rfkill *wimax_rfkill; 179 180 struct hotplug_slot *hotplug_slot; 181 struct mutex hotplug_lock; 182 183 struct led_classdev tpd_led; 184 int tpd_led_wk; 185 struct workqueue_struct *led_workqueue; 186 struct work_struct tpd_led_work; 187 }; 188 189 /* 190 * ACPI Helpers 191 */ 192 static int write_acpi_int(acpi_handle handle, const char *method, int val) 193 { 194 acpi_status status; 195 196 status = acpi_execute_simple_method(handle, (char *)method, val); 197 198 return (status == AE_OK ? 0 : -1); 199 } 200 201 static int read_acpi_int(acpi_handle handle, const char *method, int *val) 202 { 203 acpi_status status; 204 unsigned long long result; 205 206 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 207 if (ACPI_FAILURE(status)) { 208 *val = -1; 209 return -1; 210 } else { 211 *val = result; 212 return 0; 213 } 214 } 215 216 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value) 217 { 218 const char *method = cm_setv[cm]; 219 220 if (method == NULL) 221 return -ENODEV; 222 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 223 return -ENODEV; 224 225 if (write_acpi_int(eeepc->handle, method, value)) 226 pr_warn("Error writing %s\n", method); 227 return 0; 228 } 229 230 static int get_acpi(struct eeepc_laptop *eeepc, int cm) 231 { 232 const char *method = cm_getv[cm]; 233 int value; 234 235 if (method == NULL) 236 return -ENODEV; 237 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 238 return -ENODEV; 239 240 if (read_acpi_int(eeepc->handle, method, &value)) 241 pr_warn("Error reading %s\n", method); 242 return value; 243 } 244 245 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm, 246 acpi_handle *handle) 247 { 248 const char *method = cm_setv[cm]; 249 acpi_status status; 250 251 if (method == NULL) 252 return -ENODEV; 253 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 254 return -ENODEV; 255 256 status = acpi_get_handle(eeepc->handle, (char *)method, 257 handle); 258 if (status != AE_OK) { 259 pr_warn("Error finding %s\n", method); 260 return -ENODEV; 261 } 262 return 0; 263 } 264 265 266 /* 267 * Sys helpers 268 */ 269 static int parse_arg(const char *buf, int *val) 270 { 271 if (sscanf(buf, "%i", val) != 1) 272 return -EINVAL; 273 return 0; 274 } 275 276 static ssize_t store_sys_acpi(struct device *dev, int cm, 277 const char *buf, size_t count) 278 { 279 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 280 int rv, value; 281 282 rv = parse_arg(buf, &value); 283 if (rv < 0) 284 return rv; 285 rv = set_acpi(eeepc, cm, value); 286 if (rv < 0) 287 return -EIO; 288 return count; 289 } 290 291 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf) 292 { 293 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 294 int value = get_acpi(eeepc, cm); 295 296 if (value < 0) 297 return -EIO; 298 return sprintf(buf, "%d\n", value); 299 } 300 301 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \ 302 static ssize_t _name##_show(struct device *dev, \ 303 struct device_attribute *attr, \ 304 char *buf) \ 305 { \ 306 return show_sys_acpi(dev, _cm, buf); \ 307 } 308 309 #define EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 310 static ssize_t _name##_store(struct device *dev, \ 311 struct device_attribute *attr, \ 312 const char *buf, size_t count) \ 313 { \ 314 return store_sys_acpi(dev, _cm, buf, count); \ 315 } 316 317 #define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \ 318 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \ 319 EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 320 static DEVICE_ATTR_RW(_name) 321 322 #define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \ 323 EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 324 static DEVICE_ATTR_WO(_name) 325 326 EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA); 327 EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER); 328 EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH); 329 330 struct eeepc_cpufv { 331 int num; 332 int cur; 333 }; 334 335 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c) 336 { 337 c->cur = get_acpi(eeepc, CM_ASL_CPUFV); 338 if (c->cur < 0) 339 return -ENODEV; 340 341 c->num = (c->cur >> 8) & 0xff; 342 c->cur &= 0xff; 343 if (c->num == 0 || c->num > 12) 344 return -ENODEV; 345 return 0; 346 } 347 348 static ssize_t available_cpufv_show(struct device *dev, 349 struct device_attribute *attr, 350 char *buf) 351 { 352 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 353 struct eeepc_cpufv c; 354 int i; 355 ssize_t len = 0; 356 357 if (get_cpufv(eeepc, &c)) 358 return -ENODEV; 359 for (i = 0; i < c.num; i++) 360 len += sprintf(buf + len, "%d ", i); 361 len += sprintf(buf + len, "\n"); 362 return len; 363 } 364 365 static ssize_t cpufv_show(struct device *dev, 366 struct device_attribute *attr, 367 char *buf) 368 { 369 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 370 struct eeepc_cpufv c; 371 372 if (get_cpufv(eeepc, &c)) 373 return -ENODEV; 374 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur); 375 } 376 377 static ssize_t cpufv_store(struct device *dev, 378 struct device_attribute *attr, 379 const char *buf, size_t count) 380 { 381 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 382 struct eeepc_cpufv c; 383 int rv, value; 384 385 if (eeepc->cpufv_disabled) 386 return -EPERM; 387 if (get_cpufv(eeepc, &c)) 388 return -ENODEV; 389 rv = parse_arg(buf, &value); 390 if (rv < 0) 391 return rv; 392 if (value < 0 || value >= c.num) 393 return -EINVAL; 394 rv = set_acpi(eeepc, CM_ASL_CPUFV, value); 395 if (rv) 396 return rv; 397 return count; 398 } 399 400 static ssize_t cpufv_disabled_show(struct device *dev, 401 struct device_attribute *attr, 402 char *buf) 403 { 404 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 405 406 return sprintf(buf, "%d\n", eeepc->cpufv_disabled); 407 } 408 409 static ssize_t cpufv_disabled_store(struct device *dev, 410 struct device_attribute *attr, 411 const char *buf, size_t count) 412 { 413 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 414 int rv, value; 415 416 rv = parse_arg(buf, &value); 417 if (rv < 0) 418 return rv; 419 420 switch (value) { 421 case 0: 422 if (eeepc->cpufv_disabled) 423 pr_warn("cpufv enabled (not officially supported on this model)\n"); 424 eeepc->cpufv_disabled = false; 425 return count; 426 case 1: 427 return -EPERM; 428 default: 429 return -EINVAL; 430 } 431 } 432 433 434 static DEVICE_ATTR_RW(cpufv); 435 static DEVICE_ATTR_RO(available_cpufv); 436 static DEVICE_ATTR_RW(cpufv_disabled); 437 438 static struct attribute *platform_attributes[] = { 439 &dev_attr_camera.attr, 440 &dev_attr_cardr.attr, 441 &dev_attr_disp.attr, 442 &dev_attr_cpufv.attr, 443 &dev_attr_available_cpufv.attr, 444 &dev_attr_cpufv_disabled.attr, 445 NULL 446 }; 447 448 static const struct attribute_group platform_attribute_group = { 449 .attrs = platform_attributes 450 }; 451 452 static int eeepc_platform_init(struct eeepc_laptop *eeepc) 453 { 454 int result; 455 456 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1); 457 if (!eeepc->platform_device) 458 return -ENOMEM; 459 platform_set_drvdata(eeepc->platform_device, eeepc); 460 461 result = platform_device_add(eeepc->platform_device); 462 if (result) 463 goto fail_platform_device; 464 465 result = sysfs_create_group(&eeepc->platform_device->dev.kobj, 466 &platform_attribute_group); 467 if (result) 468 goto fail_sysfs; 469 return 0; 470 471 fail_sysfs: 472 platform_device_del(eeepc->platform_device); 473 fail_platform_device: 474 platform_device_put(eeepc->platform_device); 475 return result; 476 } 477 478 static void eeepc_platform_exit(struct eeepc_laptop *eeepc) 479 { 480 sysfs_remove_group(&eeepc->platform_device->dev.kobj, 481 &platform_attribute_group); 482 platform_device_unregister(eeepc->platform_device); 483 } 484 485 /* 486 * LEDs 487 */ 488 /* 489 * These functions actually update the LED's, and are called from a 490 * workqueue. By doing this as separate work rather than when the LED 491 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 492 * potentially bad time, such as a timer interrupt. 493 */ 494 static void tpd_led_update(struct work_struct *work) 495 { 496 struct eeepc_laptop *eeepc; 497 498 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work); 499 500 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk); 501 } 502 503 static void tpd_led_set(struct led_classdev *led_cdev, 504 enum led_brightness value) 505 { 506 struct eeepc_laptop *eeepc; 507 508 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 509 510 eeepc->tpd_led_wk = (value > 0) ? 1 : 0; 511 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 512 } 513 514 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 515 { 516 struct eeepc_laptop *eeepc; 517 518 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 519 520 return get_acpi(eeepc, CM_ASL_TPD); 521 } 522 523 static int eeepc_led_init(struct eeepc_laptop *eeepc) 524 { 525 int rv; 526 527 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV) 528 return 0; 529 530 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 531 if (!eeepc->led_workqueue) 532 return -ENOMEM; 533 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 534 535 eeepc->tpd_led.name = "eeepc::touchpad"; 536 eeepc->tpd_led.brightness_set = tpd_led_set; 537 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */ 538 eeepc->tpd_led.brightness_get = tpd_led_get; 539 eeepc->tpd_led.max_brightness = 1; 540 541 rv = led_classdev_register(&eeepc->platform_device->dev, 542 &eeepc->tpd_led); 543 if (rv) { 544 destroy_workqueue(eeepc->led_workqueue); 545 return rv; 546 } 547 548 return 0; 549 } 550 551 static void eeepc_led_exit(struct eeepc_laptop *eeepc) 552 { 553 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev)) 554 led_classdev_unregister(&eeepc->tpd_led); 555 if (eeepc->led_workqueue) 556 destroy_workqueue(eeepc->led_workqueue); 557 } 558 559 560 /* 561 * PCI hotplug (for wlan rfkill) 562 */ 563 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc) 564 { 565 if (get_acpi(eeepc, CM_ASL_WLAN) == 1) 566 return false; 567 return true; 568 } 569 570 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle) 571 { 572 struct pci_dev *port; 573 struct pci_dev *dev; 574 struct pci_bus *bus; 575 bool blocked = eeepc_wlan_rfkill_blocked(eeepc); 576 bool absent; 577 u32 l; 578 579 if (eeepc->wlan_rfkill) 580 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 581 582 mutex_lock(&eeepc->hotplug_lock); 583 pci_lock_rescan_remove(); 584 585 if (!eeepc->hotplug_slot) 586 goto out_unlock; 587 588 port = acpi_get_pci_dev(handle); 589 if (!port) { 590 pr_warning("Unable to find port\n"); 591 goto out_unlock; 592 } 593 594 bus = port->subordinate; 595 596 if (!bus) { 597 pr_warn("Unable to find PCI bus 1?\n"); 598 goto out_put_dev; 599 } 600 601 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 602 pr_err("Unable to read PCI config space?\n"); 603 goto out_put_dev; 604 } 605 606 absent = (l == 0xffffffff); 607 608 if (blocked != absent) { 609 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n", 610 blocked ? "blocked" : "unblocked", 611 absent ? "absent" : "present"); 612 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n"); 613 goto out_put_dev; 614 } 615 616 if (!blocked) { 617 dev = pci_get_slot(bus, 0); 618 if (dev) { 619 /* Device already present */ 620 pci_dev_put(dev); 621 goto out_put_dev; 622 } 623 dev = pci_scan_single_device(bus, 0); 624 if (dev) { 625 pci_bus_assign_resources(bus); 626 pci_bus_add_device(dev); 627 } 628 } else { 629 dev = pci_get_slot(bus, 0); 630 if (dev) { 631 pci_stop_and_remove_bus_device(dev); 632 pci_dev_put(dev); 633 } 634 } 635 out_put_dev: 636 pci_dev_put(port); 637 638 out_unlock: 639 pci_unlock_rescan_remove(); 640 mutex_unlock(&eeepc->hotplug_lock); 641 } 642 643 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node) 644 { 645 acpi_status status = AE_OK; 646 acpi_handle handle; 647 648 status = acpi_get_handle(NULL, node, &handle); 649 650 if (ACPI_SUCCESS(status)) 651 eeepc_rfkill_hotplug(eeepc, handle); 652 } 653 654 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 655 { 656 struct eeepc_laptop *eeepc = data; 657 658 if (event != ACPI_NOTIFY_BUS_CHECK) 659 return; 660 661 eeepc_rfkill_hotplug(eeepc, handle); 662 } 663 664 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc, 665 char *node) 666 { 667 acpi_status status; 668 acpi_handle handle; 669 670 status = acpi_get_handle(NULL, node, &handle); 671 672 if (ACPI_FAILURE(status)) 673 return -ENODEV; 674 675 status = acpi_install_notify_handler(handle, 676 ACPI_SYSTEM_NOTIFY, 677 eeepc_rfkill_notify, 678 eeepc); 679 if (ACPI_FAILURE(status)) 680 pr_warn("Failed to register notify on %s\n", node); 681 682 /* 683 * Refresh pci hotplug in case the rfkill state was 684 * changed during setup. 685 */ 686 eeepc_rfkill_hotplug(eeepc, handle); 687 return 0; 688 } 689 690 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc, 691 char *node) 692 { 693 acpi_status status = AE_OK; 694 acpi_handle handle; 695 696 status = acpi_get_handle(NULL, node, &handle); 697 698 if (ACPI_FAILURE(status)) 699 return; 700 701 status = acpi_remove_notify_handler(handle, 702 ACPI_SYSTEM_NOTIFY, 703 eeepc_rfkill_notify); 704 if (ACPI_FAILURE(status)) 705 pr_err("Error removing rfkill notify handler %s\n", 706 node); 707 /* 708 * Refresh pci hotplug in case the rfkill 709 * state was changed after 710 * eeepc_unregister_rfkill_notifier() 711 */ 712 eeepc_rfkill_hotplug(eeepc, handle); 713 } 714 715 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 716 u8 *value) 717 { 718 struct eeepc_laptop *eeepc = hotplug_slot->private; 719 int val = get_acpi(eeepc, CM_ASL_WLAN); 720 721 if (val == 1 || val == 0) 722 *value = val; 723 else 724 return -EINVAL; 725 726 return 0; 727 } 728 729 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 730 .owner = THIS_MODULE, 731 .get_adapter_status = eeepc_get_adapter_status, 732 .get_power_status = eeepc_get_adapter_status, 733 }; 734 735 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc) 736 { 737 int ret = -ENOMEM; 738 struct pci_bus *bus = pci_find_bus(0, 1); 739 740 if (!bus) { 741 pr_err("Unable to find wifi PCI bus\n"); 742 return -ENODEV; 743 } 744 745 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 746 if (!eeepc->hotplug_slot) 747 goto error_slot; 748 749 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 750 GFP_KERNEL); 751 if (!eeepc->hotplug_slot->info) 752 goto error_info; 753 754 eeepc->hotplug_slot->private = eeepc; 755 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 756 eeepc_get_adapter_status(eeepc->hotplug_slot, 757 &eeepc->hotplug_slot->info->adapter_status); 758 759 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 760 if (ret) { 761 pr_err("Unable to register hotplug slot - %d\n", ret); 762 goto error_register; 763 } 764 765 return 0; 766 767 error_register: 768 kfree(eeepc->hotplug_slot->info); 769 error_info: 770 kfree(eeepc->hotplug_slot); 771 eeepc->hotplug_slot = NULL; 772 error_slot: 773 return ret; 774 } 775 776 /* 777 * Rfkill devices 778 */ 779 static int eeepc_rfkill_set(void *data, bool blocked) 780 { 781 acpi_handle handle = data; 782 783 return write_acpi_int(handle, NULL, !blocked); 784 } 785 786 static const struct rfkill_ops eeepc_rfkill_ops = { 787 .set_block = eeepc_rfkill_set, 788 }; 789 790 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc, 791 struct rfkill **rfkill, 792 const char *name, 793 enum rfkill_type type, int cm) 794 { 795 acpi_handle handle; 796 int result; 797 798 result = acpi_setter_handle(eeepc, cm, &handle); 799 if (result < 0) 800 return result; 801 802 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 803 &eeepc_rfkill_ops, handle); 804 805 if (!*rfkill) 806 return -EINVAL; 807 808 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1); 809 result = rfkill_register(*rfkill); 810 if (result) { 811 rfkill_destroy(*rfkill); 812 *rfkill = NULL; 813 return result; 814 } 815 return 0; 816 } 817 818 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5"; 819 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6"; 820 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7"; 821 822 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc) 823 { 824 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1); 825 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2); 826 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3); 827 if (eeepc->wlan_rfkill) { 828 rfkill_unregister(eeepc->wlan_rfkill); 829 rfkill_destroy(eeepc->wlan_rfkill); 830 eeepc->wlan_rfkill = NULL; 831 } 832 833 if (eeepc->hotplug_slot) { 834 pci_hp_deregister(eeepc->hotplug_slot); 835 kfree(eeepc->hotplug_slot->info); 836 kfree(eeepc->hotplug_slot); 837 } 838 839 if (eeepc->bluetooth_rfkill) { 840 rfkill_unregister(eeepc->bluetooth_rfkill); 841 rfkill_destroy(eeepc->bluetooth_rfkill); 842 eeepc->bluetooth_rfkill = NULL; 843 } 844 if (eeepc->wwan3g_rfkill) { 845 rfkill_unregister(eeepc->wwan3g_rfkill); 846 rfkill_destroy(eeepc->wwan3g_rfkill); 847 eeepc->wwan3g_rfkill = NULL; 848 } 849 if (eeepc->wimax_rfkill) { 850 rfkill_unregister(eeepc->wimax_rfkill); 851 rfkill_destroy(eeepc->wimax_rfkill); 852 eeepc->wimax_rfkill = NULL; 853 } 854 } 855 856 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc) 857 { 858 int result = 0; 859 860 mutex_init(&eeepc->hotplug_lock); 861 862 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 863 "eeepc-wlan", RFKILL_TYPE_WLAN, 864 CM_ASL_WLAN); 865 866 if (result && result != -ENODEV) 867 goto exit; 868 869 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 870 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 871 CM_ASL_BLUETOOTH); 872 873 if (result && result != -ENODEV) 874 goto exit; 875 876 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 877 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 878 CM_ASL_3G); 879 880 if (result && result != -ENODEV) 881 goto exit; 882 883 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 884 "eeepc-wimax", RFKILL_TYPE_WIMAX, 885 CM_ASL_WIMAX); 886 887 if (result && result != -ENODEV) 888 goto exit; 889 890 if (eeepc->hotplug_disabled) 891 return 0; 892 893 result = eeepc_setup_pci_hotplug(eeepc); 894 /* 895 * If we get -EBUSY then something else is handling the PCI hotplug - 896 * don't fail in this case 897 */ 898 if (result == -EBUSY) 899 result = 0; 900 901 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1); 902 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2); 903 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3); 904 905 exit: 906 if (result && result != -ENODEV) 907 eeepc_rfkill_exit(eeepc); 908 return result; 909 } 910 911 /* 912 * Platform driver - hibernate/resume callbacks 913 */ 914 static int eeepc_hotk_thaw(struct device *device) 915 { 916 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 917 918 if (eeepc->wlan_rfkill) { 919 int wlan; 920 921 /* 922 * Work around bios bug - acpi _PTS turns off the wireless led 923 * during suspend. Normally it restores it on resume, but 924 * we should kick it ourselves in case hibernation is aborted. 925 */ 926 wlan = get_acpi(eeepc, CM_ASL_WLAN); 927 if (wlan >= 0) 928 set_acpi(eeepc, CM_ASL_WLAN, wlan); 929 } 930 931 return 0; 932 } 933 934 static int eeepc_hotk_restore(struct device *device) 935 { 936 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 937 938 /* Refresh both wlan rfkill state and pci hotplug */ 939 if (eeepc->wlan_rfkill) { 940 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1); 941 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2); 942 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3); 943 } 944 945 if (eeepc->bluetooth_rfkill) 946 rfkill_set_sw_state(eeepc->bluetooth_rfkill, 947 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1); 948 if (eeepc->wwan3g_rfkill) 949 rfkill_set_sw_state(eeepc->wwan3g_rfkill, 950 get_acpi(eeepc, CM_ASL_3G) != 1); 951 if (eeepc->wimax_rfkill) 952 rfkill_set_sw_state(eeepc->wimax_rfkill, 953 get_acpi(eeepc, CM_ASL_WIMAX) != 1); 954 955 return 0; 956 } 957 958 static const struct dev_pm_ops eeepc_pm_ops = { 959 .thaw = eeepc_hotk_thaw, 960 .restore = eeepc_hotk_restore, 961 }; 962 963 static struct platform_driver platform_driver = { 964 .driver = { 965 .name = EEEPC_LAPTOP_FILE, 966 .pm = &eeepc_pm_ops, 967 } 968 }; 969 970 /* 971 * Hwmon device 972 */ 973 974 #define EEEPC_EC_SC00 0x61 975 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */ 976 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */ 977 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */ 978 979 #define EEEPC_EC_SFB0 0xD0 980 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */ 981 982 static inline int eeepc_pwm_to_lmsensors(int value) 983 { 984 return value * 255 / 100; 985 } 986 987 static inline int eeepc_lmsensors_to_pwm(int value) 988 { 989 value = clamp_val(value, 0, 255); 990 return value * 100 / 255; 991 } 992 993 static int eeepc_get_fan_pwm(void) 994 { 995 u8 value = 0; 996 997 ec_read(EEEPC_EC_FAN_PWM, &value); 998 return eeepc_pwm_to_lmsensors(value); 999 } 1000 1001 static void eeepc_set_fan_pwm(int value) 1002 { 1003 value = eeepc_lmsensors_to_pwm(value); 1004 ec_write(EEEPC_EC_FAN_PWM, value); 1005 } 1006 1007 static int eeepc_get_fan_rpm(void) 1008 { 1009 u8 high = 0; 1010 u8 low = 0; 1011 1012 ec_read(EEEPC_EC_FAN_HRPM, &high); 1013 ec_read(EEEPC_EC_FAN_LRPM, &low); 1014 return high << 8 | low; 1015 } 1016 1017 #define EEEPC_EC_FAN_CTRL_BIT 0x02 1018 #define EEEPC_FAN_CTRL_MANUAL 1 1019 #define EEEPC_FAN_CTRL_AUTO 2 1020 1021 static int eeepc_get_fan_ctrl(void) 1022 { 1023 u8 value = 0; 1024 1025 ec_read(EEEPC_EC_FAN_CTRL, &value); 1026 if (value & EEEPC_EC_FAN_CTRL_BIT) 1027 return EEEPC_FAN_CTRL_MANUAL; 1028 else 1029 return EEEPC_FAN_CTRL_AUTO; 1030 } 1031 1032 static void eeepc_set_fan_ctrl(int manual) 1033 { 1034 u8 value = 0; 1035 1036 ec_read(EEEPC_EC_FAN_CTRL, &value); 1037 if (manual == EEEPC_FAN_CTRL_MANUAL) 1038 value |= EEEPC_EC_FAN_CTRL_BIT; 1039 else 1040 value &= ~EEEPC_EC_FAN_CTRL_BIT; 1041 ec_write(EEEPC_EC_FAN_CTRL, value); 1042 } 1043 1044 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) 1045 { 1046 int rv, value; 1047 1048 rv = parse_arg(buf, &value); 1049 if (rv < 0) 1050 return rv; 1051 set(value); 1052 return count; 1053 } 1054 1055 static ssize_t show_sys_hwmon(int (*get)(void), char *buf) 1056 { 1057 return sprintf(buf, "%d\n", get()); 1058 } 1059 1060 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1061 static ssize_t _name##_show(struct device *dev, \ 1062 struct device_attribute *attr, \ 1063 char *buf) \ 1064 { \ 1065 return show_sys_hwmon(_get, buf); \ 1066 } 1067 1068 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \ 1069 static ssize_t _name##_store(struct device *dev, \ 1070 struct device_attribute *attr, \ 1071 const char *buf, size_t count) \ 1072 { \ 1073 return store_sys_hwmon(_set, buf, count); \ 1074 } 1075 1076 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \ 1077 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1078 EEEPC_SENSOR_STORE_FUNC(_name, _set) \ 1079 static DEVICE_ATTR_RW(_name) 1080 1081 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \ 1082 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1083 static DEVICE_ATTR_RO(_name) 1084 1085 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm); 1086 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm, 1087 eeepc_set_fan_pwm); 1088 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl, 1089 eeepc_set_fan_ctrl); 1090 1091 static struct attribute *hwmon_attrs[] = { 1092 &dev_attr_pwm1.attr, 1093 &dev_attr_fan1_input.attr, 1094 &dev_attr_pwm1_enable.attr, 1095 NULL 1096 }; 1097 ATTRIBUTE_GROUPS(hwmon); 1098 1099 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc) 1100 { 1101 struct device *dev = &eeepc->platform_device->dev; 1102 struct device *hwmon; 1103 1104 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL, 1105 hwmon_groups); 1106 if (IS_ERR(hwmon)) { 1107 pr_err("Could not register eeepc hwmon device\n"); 1108 return PTR_ERR(hwmon); 1109 } 1110 return 0; 1111 } 1112 1113 /* 1114 * Backlight device 1115 */ 1116 static int read_brightness(struct backlight_device *bd) 1117 { 1118 struct eeepc_laptop *eeepc = bl_get_data(bd); 1119 1120 return get_acpi(eeepc, CM_ASL_PANELBRIGHT); 1121 } 1122 1123 static int set_brightness(struct backlight_device *bd, int value) 1124 { 1125 struct eeepc_laptop *eeepc = bl_get_data(bd); 1126 1127 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value); 1128 } 1129 1130 static int update_bl_status(struct backlight_device *bd) 1131 { 1132 return set_brightness(bd, bd->props.brightness); 1133 } 1134 1135 static const struct backlight_ops eeepcbl_ops = { 1136 .get_brightness = read_brightness, 1137 .update_status = update_bl_status, 1138 }; 1139 1140 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc) 1141 { 1142 struct backlight_device *bd = eeepc->backlight_device; 1143 int old = bd->props.brightness; 1144 1145 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1146 1147 return old; 1148 } 1149 1150 static int eeepc_backlight_init(struct eeepc_laptop *eeepc) 1151 { 1152 struct backlight_properties props; 1153 struct backlight_device *bd; 1154 1155 memset(&props, 0, sizeof(struct backlight_properties)); 1156 props.type = BACKLIGHT_PLATFORM; 1157 props.max_brightness = 15; 1158 bd = backlight_device_register(EEEPC_LAPTOP_FILE, 1159 &eeepc->platform_device->dev, eeepc, 1160 &eeepcbl_ops, &props); 1161 if (IS_ERR(bd)) { 1162 pr_err("Could not register eeepc backlight device\n"); 1163 eeepc->backlight_device = NULL; 1164 return PTR_ERR(bd); 1165 } 1166 eeepc->backlight_device = bd; 1167 bd->props.brightness = read_brightness(bd); 1168 bd->props.power = FB_BLANK_UNBLANK; 1169 backlight_update_status(bd); 1170 return 0; 1171 } 1172 1173 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc) 1174 { 1175 backlight_device_unregister(eeepc->backlight_device); 1176 eeepc->backlight_device = NULL; 1177 } 1178 1179 1180 /* 1181 * Input device (i.e. hotkeys) 1182 */ 1183 static int eeepc_input_init(struct eeepc_laptop *eeepc) 1184 { 1185 struct input_dev *input; 1186 int error; 1187 1188 input = input_allocate_device(); 1189 if (!input) 1190 return -ENOMEM; 1191 1192 input->name = "Asus EeePC extra buttons"; 1193 input->phys = EEEPC_LAPTOP_FILE "/input0"; 1194 input->id.bustype = BUS_HOST; 1195 input->dev.parent = &eeepc->platform_device->dev; 1196 1197 error = sparse_keymap_setup(input, eeepc_keymap, NULL); 1198 if (error) { 1199 pr_err("Unable to setup input device keymap\n"); 1200 goto err_free_dev; 1201 } 1202 1203 error = input_register_device(input); 1204 if (error) { 1205 pr_err("Unable to register input device\n"); 1206 goto err_free_dev; 1207 } 1208 1209 eeepc->inputdev = input; 1210 return 0; 1211 1212 err_free_dev: 1213 input_free_device(input); 1214 return error; 1215 } 1216 1217 static void eeepc_input_exit(struct eeepc_laptop *eeepc) 1218 { 1219 if (eeepc->inputdev) 1220 input_unregister_device(eeepc->inputdev); 1221 eeepc->inputdev = NULL; 1222 } 1223 1224 /* 1225 * ACPI driver 1226 */ 1227 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event) 1228 { 1229 if (!eeepc->inputdev) 1230 return; 1231 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true)) 1232 pr_info("Unknown key %x pressed\n", event); 1233 } 1234 1235 static void eeepc_acpi_notify(struct acpi_device *device, u32 event) 1236 { 1237 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1238 int old_brightness, new_brightness; 1239 u16 count; 1240 1241 if (event > ACPI_MAX_SYS_NOTIFY) 1242 return; 1243 count = eeepc->event_count[event % 128]++; 1244 acpi_bus_generate_netlink_event(device->pnp.device_class, 1245 dev_name(&device->dev), event, 1246 count); 1247 1248 /* Brightness events are special */ 1249 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) { 1250 eeepc_input_notify(eeepc, event); 1251 return; 1252 } 1253 1254 /* Ignore them completely if the acpi video driver is used */ 1255 if (!eeepc->backlight_device) 1256 return; 1257 1258 /* Update the backlight device. */ 1259 old_brightness = eeepc_backlight_notify(eeepc); 1260 1261 /* Convert event to keypress (obsolescent hack) */ 1262 new_brightness = event - NOTIFY_BRN_MIN; 1263 1264 if (new_brightness < old_brightness) { 1265 event = NOTIFY_BRN_MIN; /* brightness down */ 1266 } else if (new_brightness > old_brightness) { 1267 event = NOTIFY_BRN_MAX; /* brightness up */ 1268 } else { 1269 /* 1270 * no change in brightness - already at min/max, 1271 * event will be desired value (or else ignored) 1272 */ 1273 } 1274 eeepc_input_notify(eeepc, event); 1275 } 1276 1277 static void eeepc_dmi_check(struct eeepc_laptop *eeepc) 1278 { 1279 const char *model; 1280 1281 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1282 if (!model) 1283 return; 1284 1285 /* 1286 * Blacklist for setting cpufv (cpu speed). 1287 * 1288 * EeePC 4G ("701") implements CFVS, but it is not supported 1289 * by the pre-installed OS, and the original option to change it 1290 * in the BIOS setup screen was removed in later versions. 1291 * 1292 * Judging by the lack of "Super Hybrid Engine" on Asus product pages, 1293 * this applies to all "701" models (4G/4G Surf/2G Surf). 1294 * 1295 * So Asus made a deliberate decision not to support it on this model. 1296 * We have several reports that using it can cause the system to hang 1297 * 1298 * The hang has also been reported on a "702" (Model name "8G"?). 1299 * 1300 * We avoid dmi_check_system() / dmi_match(), because they use 1301 * substring matching. We don't want to affect the "701SD" 1302 * and "701SDX" models, because they do support S.H.E. 1303 */ 1304 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) { 1305 eeepc->cpufv_disabled = true; 1306 pr_info("model %s does not officially support setting cpu speed\n", 1307 model); 1308 pr_info("cpufv disabled to avoid instability\n"); 1309 } 1310 1311 /* 1312 * Blacklist for wlan hotplug 1313 * 1314 * Eeepc 1005HA doesn't work like others models and don't need the 1315 * hotplug code. In fact, current hotplug code seems to unplug another 1316 * device... 1317 */ 1318 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 || 1319 strcmp(model, "1005PE") == 0) { 1320 eeepc->hotplug_disabled = true; 1321 pr_info("wlan hotplug disabled\n"); 1322 } 1323 } 1324 1325 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name) 1326 { 1327 int dummy; 1328 1329 /* Some BIOSes do not report cm although it is available. 1330 Check if cm_getv[cm] works and, if yes, assume cm should be set. */ 1331 if (!(eeepc->cm_supported & (1 << cm)) 1332 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) { 1333 pr_info("%s (%x) not reported by BIOS, enabling anyway\n", 1334 name, 1 << cm); 1335 eeepc->cm_supported |= 1 << cm; 1336 } 1337 } 1338 1339 static void cmsg_quirks(struct eeepc_laptop *eeepc) 1340 { 1341 cmsg_quirk(eeepc, CM_ASL_LID, "LID"); 1342 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE"); 1343 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER"); 1344 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD"); 1345 } 1346 1347 static int eeepc_acpi_init(struct eeepc_laptop *eeepc) 1348 { 1349 unsigned int init_flags; 1350 int result; 1351 1352 result = acpi_bus_get_status(eeepc->device); 1353 if (result) 1354 return result; 1355 if (!eeepc->device->status.present) { 1356 pr_err("Hotkey device not present, aborting\n"); 1357 return -ENODEV; 1358 } 1359 1360 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH; 1361 pr_notice("Hotkey init flags 0x%x\n", init_flags); 1362 1363 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) { 1364 pr_err("Hotkey initialization failed\n"); 1365 return -ENODEV; 1366 } 1367 1368 /* get control methods supported */ 1369 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) { 1370 pr_err("Get control methods supported failed\n"); 1371 return -ENODEV; 1372 } 1373 cmsg_quirks(eeepc); 1374 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported); 1375 1376 return 0; 1377 } 1378 1379 static void eeepc_enable_camera(struct eeepc_laptop *eeepc) 1380 { 1381 /* 1382 * If the following call to set_acpi() fails, it's because there's no 1383 * camera so we can ignore the error. 1384 */ 1385 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0) 1386 set_acpi(eeepc, CM_ASL_CAMERA, 1); 1387 } 1388 1389 static bool eeepc_device_present; 1390 1391 static int eeepc_acpi_add(struct acpi_device *device) 1392 { 1393 struct eeepc_laptop *eeepc; 1394 int result; 1395 1396 pr_notice(EEEPC_LAPTOP_NAME "\n"); 1397 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL); 1398 if (!eeepc) 1399 return -ENOMEM; 1400 eeepc->handle = device->handle; 1401 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME); 1402 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS); 1403 device->driver_data = eeepc; 1404 eeepc->device = device; 1405 1406 eeepc->hotplug_disabled = hotplug_disabled; 1407 1408 eeepc_dmi_check(eeepc); 1409 1410 result = eeepc_acpi_init(eeepc); 1411 if (result) 1412 goto fail_platform; 1413 eeepc_enable_camera(eeepc); 1414 1415 /* 1416 * Register the platform device first. It is used as a parent for the 1417 * sub-devices below. 1418 * 1419 * Note that if there are multiple instances of this ACPI device it 1420 * will bail out, because the platform device is registered with a 1421 * fixed name. Of course it doesn't make sense to have more than one, 1422 * and machine-specific scripts find the fixed name convenient. But 1423 * It's also good for us to exclude multiple instances because both 1424 * our hwmon and our wlan rfkill subdevice use global ACPI objects 1425 * (the EC and the wlan PCI slot respectively). 1426 */ 1427 result = eeepc_platform_init(eeepc); 1428 if (result) 1429 goto fail_platform; 1430 1431 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) { 1432 result = eeepc_backlight_init(eeepc); 1433 if (result) 1434 goto fail_backlight; 1435 } 1436 1437 result = eeepc_input_init(eeepc); 1438 if (result) 1439 goto fail_input; 1440 1441 result = eeepc_hwmon_init(eeepc); 1442 if (result) 1443 goto fail_hwmon; 1444 1445 result = eeepc_led_init(eeepc); 1446 if (result) 1447 goto fail_led; 1448 1449 result = eeepc_rfkill_init(eeepc); 1450 if (result) 1451 goto fail_rfkill; 1452 1453 eeepc_device_present = true; 1454 return 0; 1455 1456 fail_rfkill: 1457 eeepc_led_exit(eeepc); 1458 fail_led: 1459 fail_hwmon: 1460 eeepc_input_exit(eeepc); 1461 fail_input: 1462 eeepc_backlight_exit(eeepc); 1463 fail_backlight: 1464 eeepc_platform_exit(eeepc); 1465 fail_platform: 1466 kfree(eeepc); 1467 1468 return result; 1469 } 1470 1471 static int eeepc_acpi_remove(struct acpi_device *device) 1472 { 1473 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1474 1475 eeepc_backlight_exit(eeepc); 1476 eeepc_rfkill_exit(eeepc); 1477 eeepc_input_exit(eeepc); 1478 eeepc_led_exit(eeepc); 1479 eeepc_platform_exit(eeepc); 1480 1481 kfree(eeepc); 1482 return 0; 1483 } 1484 1485 1486 static const struct acpi_device_id eeepc_device_ids[] = { 1487 {EEEPC_ACPI_HID, 0}, 1488 {"", 0}, 1489 }; 1490 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); 1491 1492 static struct acpi_driver eeepc_acpi_driver = { 1493 .name = EEEPC_LAPTOP_NAME, 1494 .class = EEEPC_ACPI_CLASS, 1495 .owner = THIS_MODULE, 1496 .ids = eeepc_device_ids, 1497 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1498 .ops = { 1499 .add = eeepc_acpi_add, 1500 .remove = eeepc_acpi_remove, 1501 .notify = eeepc_acpi_notify, 1502 }, 1503 }; 1504 1505 1506 static int __init eeepc_laptop_init(void) 1507 { 1508 int result; 1509 1510 result = platform_driver_register(&platform_driver); 1511 if (result < 0) 1512 return result; 1513 1514 result = acpi_bus_register_driver(&eeepc_acpi_driver); 1515 if (result < 0) 1516 goto fail_acpi_driver; 1517 1518 if (!eeepc_device_present) { 1519 result = -ENODEV; 1520 goto fail_no_device; 1521 } 1522 1523 return 0; 1524 1525 fail_no_device: 1526 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1527 fail_acpi_driver: 1528 platform_driver_unregister(&platform_driver); 1529 return result; 1530 } 1531 1532 static void __exit eeepc_laptop_exit(void) 1533 { 1534 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1535 platform_driver_unregister(&platform_driver); 1536 } 1537 1538 module_init(eeepc_laptop_init); 1539 module_exit(eeepc_laptop_exit); 1540