?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / platform / x86 / eeepc-laptop.c
blob5a681962899c32e4d69e147cd8dde49e67ab8cfa
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 void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
730 {
731 kfree(hotplug_slot->info);
732 kfree(hotplug_slot);
733 }
734
735 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
736 .owner = THIS_MODULE,
737 .get_adapter_status = eeepc_get_adapter_status,
738 .get_power_status = eeepc_get_adapter_status,
739 };
740
741 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
742 {
743 int ret = -ENOMEM;
744 struct pci_bus *bus = pci_find_bus(0, 1);
745
746 if (!bus) {
747 pr_err("Unable to find wifi PCI bus\n");
748 return -ENODEV;
749 }
750
751 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
752 if (!eeepc->hotplug_slot)
753 goto error_slot;
754
755 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
756 GFP_KERNEL);
757 if (!eeepc->hotplug_slot->info)
758 goto error_info;
759
760 eeepc->hotplug_slot->private = eeepc;
761 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
762 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
763 eeepc_get_adapter_status(eeepc->hotplug_slot,
764 &eeepc->hotplug_slot->info->adapter_status);
765
766 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
767 if (ret) {
768 pr_err("Unable to register hotplug slot - %d\n", ret);
769 goto error_register;
770 }
771
772 return 0;
773
774 error_register:
775 kfree(eeepc->hotplug_slot->info);
776 error_info:
777 kfree(eeepc->hotplug_slot);
778 eeepc->hotplug_slot = NULL;
779 error_slot:
780 return ret;
781 }
782
783 /*
784 * Rfkill devices
785 */
786 static int eeepc_rfkill_set(void *data, bool blocked)
787 {
788 acpi_handle handle = data;
789
790 return write_acpi_int(handle, NULL, !blocked);
791 }
792
793 static const struct rfkill_ops eeepc_rfkill_ops = {
794 .set_block = eeepc_rfkill_set,
795 };
796
797 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
798 struct rfkill **rfkill,
799 const char *name,
800 enum rfkill_type type, int cm)
801 {
802 acpi_handle handle;
803 int result;
804
805 result = acpi_setter_handle(eeepc, cm, &handle);
806 if (result < 0)
807 return result;
808
809 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
810 &eeepc_rfkill_ops, handle);
811
812 if (!*rfkill)
813 return -EINVAL;
814
815 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
816 result = rfkill_register(*rfkill);
817 if (result) {
818 rfkill_destroy(*rfkill);
819 *rfkill = NULL;
820 return result;
821 }
822 return 0;
823 }
824
825 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
826 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
827 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
828
829 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
830 {
831 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
832 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
833 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
834 if (eeepc->wlan_rfkill) {
835 rfkill_unregister(eeepc->wlan_rfkill);
836 rfkill_destroy(eeepc->wlan_rfkill);
837 eeepc->wlan_rfkill = NULL;
838 }
839
840 if (eeepc->hotplug_slot)
841 pci_hp_deregister(eeepc->hotplug_slot);
842
843 if (eeepc->bluetooth_rfkill) {
844 rfkill_unregister(eeepc->bluetooth_rfkill);
845 rfkill_destroy(eeepc->bluetooth_rfkill);
846 eeepc->bluetooth_rfkill = NULL;
847 }
848 if (eeepc->wwan3g_rfkill) {
849 rfkill_unregister(eeepc->wwan3g_rfkill);
850 rfkill_destroy(eeepc->wwan3g_rfkill);
851 eeepc->wwan3g_rfkill = NULL;
852 }
853 if (eeepc->wimax_rfkill) {
854 rfkill_unregister(eeepc->wimax_rfkill);
855 rfkill_destroy(eeepc->wimax_rfkill);
856 eeepc->wimax_rfkill = NULL;
857 }
858 }
859
860 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
861 {
862 int result = 0;
863
864 mutex_init(&eeepc->hotplug_lock);
865
866 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
867 "eeepc-wlan", RFKILL_TYPE_WLAN,
868 CM_ASL_WLAN);
869
870 if (result && result != -ENODEV)
871 goto exit;
872
873 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
874 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
875 CM_ASL_BLUETOOTH);
876
877 if (result && result != -ENODEV)
878 goto exit;
879
880 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
881 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
882 CM_ASL_3G);
883
884 if (result && result != -ENODEV)
885 goto exit;
886
887 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
888 "eeepc-wimax", RFKILL_TYPE_WIMAX,
889 CM_ASL_WIMAX);
890
891 if (result && result != -ENODEV)
892 goto exit;
893
894 if (eeepc->hotplug_disabled)
895 return 0;
896
897 result = eeepc_setup_pci_hotplug(eeepc);
898 /*
899 * If we get -EBUSY then something else is handling the PCI hotplug -
900 * don't fail in this case
901 */
902 if (result == -EBUSY)
903 result = 0;
904
905 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
906 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
907 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
908
909 exit:
910 if (result && result != -ENODEV)
911 eeepc_rfkill_exit(eeepc);
912 return result;
913 }
914
915 /*
916 * Platform driver - hibernate/resume callbacks
917 */
918 static int eeepc_hotk_thaw(struct device *device)
919 {
920 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
921
922 if (eeepc->wlan_rfkill) {
923 int wlan;
924
925 /*
926 * Work around bios bug - acpi _PTS turns off the wireless led
927 * during suspend. Normally it restores it on resume, but
928 * we should kick it ourselves in case hibernation is aborted.
929 */
930 wlan = get_acpi(eeepc, CM_ASL_WLAN);
931 if (wlan >= 0)
932 set_acpi(eeepc, CM_ASL_WLAN, wlan);
933 }
934
935 return 0;
936 }
937
938 static int eeepc_hotk_restore(struct device *device)
939 {
940 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
941
942 /* Refresh both wlan rfkill state and pci hotplug */
943 if (eeepc->wlan_rfkill) {
944 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
945 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
946 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
947 }
948
949 if (eeepc->bluetooth_rfkill)
950 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
951 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
952 if (eeepc->wwan3g_rfkill)
953 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
954 get_acpi(eeepc, CM_ASL_3G) != 1);
955 if (eeepc->wimax_rfkill)
956 rfkill_set_sw_state(eeepc->wimax_rfkill,
957 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
958
959 return 0;
960 }
961
962 static const struct dev_pm_ops eeepc_pm_ops = {
963 .thaw = eeepc_hotk_thaw,
964 .restore = eeepc_hotk_restore,
965 };
966
967 static struct platform_driver platform_driver = {
968 .driver = {
969 .name = EEEPC_LAPTOP_FILE,
970 .pm = &eeepc_pm_ops,
971 }
972 };
973
974 /*
975 * Hwmon device
976 */
977
978 #define EEEPC_EC_SC00 0x61
979 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
980 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
981 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
982
983 #define EEEPC_EC_SFB0 0xD0
984 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
985
986 static inline int eeepc_pwm_to_lmsensors(int value)
987 {
988 return value * 255 / 100;
989 }
990
991 static inline int eeepc_lmsensors_to_pwm(int value)
992 {
993 value = clamp_val(value, 0, 255);
994 return value * 100 / 255;
995 }
996
997 static int eeepc_get_fan_pwm(void)
998 {
999 u8 value = 0;
1000
1001 ec_read(EEEPC_EC_FAN_PWM, &value);
1002 return eeepc_pwm_to_lmsensors(value);
1003 }
1004
1005 static void eeepc_set_fan_pwm(int value)
1006 {
1007 value = eeepc_lmsensors_to_pwm(value);
1008 ec_write(EEEPC_EC_FAN_PWM, value);
1009 }
1010
1011 static int eeepc_get_fan_rpm(void)
1012 {
1013 u8 high = 0;
1014 u8 low = 0;
1015
1016 ec_read(EEEPC_EC_FAN_HRPM, &high);
1017 ec_read(EEEPC_EC_FAN_LRPM, &low);
1018 return high << 8 | low;
1019 }
1020
1021 #define EEEPC_EC_FAN_CTRL_BIT 0x02
1022 #define EEEPC_FAN_CTRL_MANUAL 1
1023 #define EEEPC_FAN_CTRL_AUTO 2
1024
1025 static int eeepc_get_fan_ctrl(void)
1026 {
1027 u8 value = 0;
1028
1029 ec_read(EEEPC_EC_FAN_CTRL, &value);
1030 if (value & EEEPC_EC_FAN_CTRL_BIT)
1031 return EEEPC_FAN_CTRL_MANUAL;
1032 else
1033 return EEEPC_FAN_CTRL_AUTO;
1034 }
1035
1036 static void eeepc_set_fan_ctrl(int manual)
1037 {
1038 u8 value = 0;
1039
1040 ec_read(EEEPC_EC_FAN_CTRL, &value);
1041 if (manual == EEEPC_FAN_CTRL_MANUAL)
1042 value |= EEEPC_EC_FAN_CTRL_BIT;
1043 else
1044 value &= ~EEEPC_EC_FAN_CTRL_BIT;
1045 ec_write(EEEPC_EC_FAN_CTRL, value);
1046 }
1047
1048 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1049 {
1050 int rv, value;
1051
1052 rv = parse_arg(buf, &value);
1053 if (rv < 0)
1054 return rv;
1055 set(value);
1056 return count;
1057 }
1058
1059 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1060 {
1061 return sprintf(buf, "%d\n", get());
1062 }
1063
1064 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1065 static ssize_t _name##_show(struct device *dev, \
1066 struct device_attribute *attr, \
1067 char *buf) \
1068 { \
1069 return show_sys_hwmon(_get, buf); \
1070 }
1071
1072 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1073 static ssize_t _name##_store(struct device *dev, \
1074 struct device_attribute *attr, \
1075 const char *buf, size_t count) \
1076 { \
1077 return store_sys_hwmon(_set, buf, count); \
1078 }
1079
1080 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1081 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1082 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1083 static DEVICE_ATTR_RW(_name)
1084
1085 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1086 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1087 static DEVICE_ATTR_RO(_name)
1088
1089 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1090 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1091 eeepc_set_fan_pwm);
1092 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1093 eeepc_set_fan_ctrl);
1094
1095 static struct attribute *hwmon_attrs[] = {
1096 &dev_attr_pwm1.attr,
1097 &dev_attr_fan1_input.attr,
1098 &dev_attr_pwm1_enable.attr,
1099 NULL
1100 };
1101 ATTRIBUTE_GROUPS(hwmon);
1102
1103 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1104 {
1105 struct device *dev = &eeepc->platform_device->dev;
1106 struct device *hwmon;
1107
1108 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1109 hwmon_groups);
1110 if (IS_ERR(hwmon)) {
1111 pr_err("Could not register eeepc hwmon device\n");
1112 return PTR_ERR(hwmon);
1113 }
1114 return 0;
1115 }
1116
1117 /*
1118 * Backlight device
1119 */
1120 static int read_brightness(struct backlight_device *bd)
1121 {
1122 struct eeepc_laptop *eeepc = bl_get_data(bd);
1123
1124 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1125 }
1126
1127 static int set_brightness(struct backlight_device *bd, int value)
1128 {
1129 struct eeepc_laptop *eeepc = bl_get_data(bd);
1130
1131 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1132 }
1133
1134 static int update_bl_status(struct backlight_device *bd)
1135 {
1136 return set_brightness(bd, bd->props.brightness);
1137 }
1138
1139 static const struct backlight_ops eeepcbl_ops = {
1140 .get_brightness = read_brightness,
1141 .update_status = update_bl_status,
1142 };
1143
1144 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1145 {
1146 struct backlight_device *bd = eeepc->backlight_device;
1147 int old = bd->props.brightness;
1148
1149 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1150
1151 return old;
1152 }
1153
1154 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1155 {
1156 struct backlight_properties props;
1157 struct backlight_device *bd;
1158
1159 memset(&props, 0, sizeof(struct backlight_properties));
1160 props.type = BACKLIGHT_PLATFORM;
1161 props.max_brightness = 15;
1162 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1163 &eeepc->platform_device->dev, eeepc,
1164 &eeepcbl_ops, &props);
1165 if (IS_ERR(bd)) {
1166 pr_err("Could not register eeepc backlight device\n");
1167 eeepc->backlight_device = NULL;
1168 return PTR_ERR(bd);
1169 }
1170 eeepc->backlight_device = bd;
1171 bd->props.brightness = read_brightness(bd);
1172 bd->props.power = FB_BLANK_UNBLANK;
1173 backlight_update_status(bd);
1174 return 0;
1175 }
1176
1177 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1178 {
1179 backlight_device_unregister(eeepc->backlight_device);
1180 eeepc->backlight_device = NULL;
1181 }
1182
1183
1184 /*
1185 * Input device (i.e. hotkeys)
1186 */
1187 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1188 {
1189 struct input_dev *input;
1190 int error;
1191
1192 input = input_allocate_device();
1193 if (!input)
1194 return -ENOMEM;
1195
1196 input->name = "Asus EeePC extra buttons";
1197 input->phys = EEEPC_LAPTOP_FILE "/input0";
1198 input->id.bustype = BUS_HOST;
1199 input->dev.parent = &eeepc->platform_device->dev;
1200
1201 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1202 if (error) {
1203 pr_err("Unable to setup input device keymap\n");
1204 goto err_free_dev;
1205 }
1206
1207 error = input_register_device(input);
1208 if (error) {
1209 pr_err("Unable to register input device\n");
1210 goto err_free_dev;
1211 }
1212
1213 eeepc->inputdev = input;
1214 return 0;
1215
1216 err_free_dev:
1217 input_free_device(input);
1218 return error;
1219 }
1220
1221 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1222 {
1223 if (eeepc->inputdev)
1224 input_unregister_device(eeepc->inputdev);
1225 eeepc->inputdev = NULL;
1226 }
1227
1228 /*
1229 * ACPI driver
1230 */
1231 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1232 {
1233 if (!eeepc->inputdev)
1234 return;
1235 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1236 pr_info("Unknown key %x pressed\n", event);
1237 }
1238
1239 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1240 {
1241 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1242 int old_brightness, new_brightness;
1243 u16 count;
1244
1245 if (event > ACPI_MAX_SYS_NOTIFY)
1246 return;
1247 count = eeepc->event_count[event % 128]++;
1248 acpi_bus_generate_netlink_event(device->pnp.device_class,
1249 dev_name(&device->dev), event,
1250 count);
1251
1252 /* Brightness events are special */
1253 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1254 eeepc_input_notify(eeepc, event);
1255 return;
1256 }
1257
1258 /* Ignore them completely if the acpi video driver is used */
1259 if (!eeepc->backlight_device)
1260 return;
1261
1262 /* Update the backlight device. */
1263 old_brightness = eeepc_backlight_notify(eeepc);
1264
1265 /* Convert event to keypress (obsolescent hack) */
1266 new_brightness = event - NOTIFY_BRN_MIN;
1267
1268 if (new_brightness < old_brightness) {
1269 event = NOTIFY_BRN_MIN; /* brightness down */
1270 } else if (new_brightness > old_brightness) {
1271 event = NOTIFY_BRN_MAX; /* brightness up */
1272 } else {
1273 /*
1274 * no change in brightness - already at min/max,
1275 * event will be desired value (or else ignored)
1276 */
1277 }
1278 eeepc_input_notify(eeepc, event);
1279 }
1280
1281 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1282 {
1283 const char *model;
1284
1285 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1286 if (!model)
1287 return;
1288
1289 /*
1290 * Blacklist for setting cpufv (cpu speed).
1291 *
1292 * EeePC 4G ("701") implements CFVS, but it is not supported
1293 * by the pre-installed OS, and the original option to change it
1294 * in the BIOS setup screen was removed in later versions.
1295 *
1296 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1297 * this applies to all "701" models (4G/4G Surf/2G Surf).
1298 *
1299 * So Asus made a deliberate decision not to support it on this model.
1300 * We have several reports that using it can cause the system to hang
1301 *
1302 * The hang has also been reported on a "702" (Model name "8G"?).
1303 *
1304 * We avoid dmi_check_system() / dmi_match(), because they use
1305 * substring matching. We don't want to affect the "701SD"
1306 * and "701SDX" models, because they do support S.H.E.
1307 */
1308 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1309 eeepc->cpufv_disabled = true;
1310 pr_info("model %s does not officially support setting cpu speed\n",
1311 model);
1312 pr_info("cpufv disabled to avoid instability\n");
1313 }
1314
1315 /*
1316 * Blacklist for wlan hotplug
1317 *
1318 * Eeepc 1005HA doesn't work like others models and don't need the
1319 * hotplug code. In fact, current hotplug code seems to unplug another
1320 * device...
1321 */
1322 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1323 strcmp(model, "1005PE") == 0) {
1324 eeepc->hotplug_disabled = true;
1325 pr_info("wlan hotplug disabled\n");
1326 }
1327 }
1328
1329 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1330 {
1331 int dummy;
1332
1333 /* Some BIOSes do not report cm although it is available.
1334 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1335 if (!(eeepc->cm_supported & (1 << cm))
1336 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1337 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1338 name, 1 << cm);
1339 eeepc->cm_supported |= 1 << cm;
1340 }
1341 }
1342
1343 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1344 {
1345 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1346 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1347 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1348 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1349 }
1350
1351 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1352 {
1353 unsigned int init_flags;
1354 int result;
1355
1356 result = acpi_bus_get_status(eeepc->device);
1357 if (result)
1358 return result;
1359 if (!eeepc->device->status.present) {
1360 pr_err("Hotkey device not present, aborting\n");
1361 return -ENODEV;
1362 }
1363
1364 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1365 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1366
1367 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1368 pr_err("Hotkey initialization failed\n");
1369 return -ENODEV;
1370 }
1371
1372 /* get control methods supported */
1373 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1374 pr_err("Get control methods supported failed\n");
1375 return -ENODEV;
1376 }
1377 cmsg_quirks(eeepc);
1378 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1379
1380 return 0;
1381 }
1382
1383 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1384 {
1385 /*
1386 * If the following call to set_acpi() fails, it's because there's no
1387 * camera so we can ignore the error.
1388 */
1389 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1390 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1391 }
1392
1393 static bool eeepc_device_present;
1394
1395 static int eeepc_acpi_add(struct acpi_device *device)
1396 {
1397 struct eeepc_laptop *eeepc;
1398 int result;
1399
1400 pr_notice(EEEPC_LAPTOP_NAME "\n");
1401 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1402 if (!eeepc)
1403 return -ENOMEM;
1404 eeepc->handle = device->handle;
1405 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1406 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1407 device->driver_data = eeepc;
1408 eeepc->device = device;
1409
1410 eeepc->hotplug_disabled = hotplug_disabled;
1411
1412 eeepc_dmi_check(eeepc);
1413
1414 result = eeepc_acpi_init(eeepc);
1415 if (result)
1416 goto fail_platform;
1417 eeepc_enable_camera(eeepc);
1418
1419 /*
1420 * Register the platform device first. It is used as a parent for the
1421 * sub-devices below.
1422 *
1423 * Note that if there are multiple instances of this ACPI device it
1424 * will bail out, because the platform device is registered with a
1425 * fixed name. Of course it doesn't make sense to have more than one,
1426 * and machine-specific scripts find the fixed name convenient. But
1427 * It's also good for us to exclude multiple instances because both
1428 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1429 * (the EC and the wlan PCI slot respectively).
1430 */
1431 result = eeepc_platform_init(eeepc);
1432 if (result)
1433 goto fail_platform;
1434
1435 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1436 result = eeepc_backlight_init(eeepc);
1437 if (result)
1438 goto fail_backlight;
1439 }
1440
1441 result = eeepc_input_init(eeepc);
1442 if (result)
1443 goto fail_input;
1444
1445 result = eeepc_hwmon_init(eeepc);
1446 if (result)
1447 goto fail_hwmon;
1448
1449 result = eeepc_led_init(eeepc);
1450 if (result)
1451 goto fail_led;
1452
1453 result = eeepc_rfkill_init(eeepc);
1454 if (result)
1455 goto fail_rfkill;
1456
1457 eeepc_device_present = true;
1458 return 0;
1459
1460 fail_rfkill:
1461 eeepc_led_exit(eeepc);
1462 fail_led:
1463 fail_hwmon:
1464 eeepc_input_exit(eeepc);
1465 fail_input:
1466 eeepc_backlight_exit(eeepc);
1467 fail_backlight:
1468 eeepc_platform_exit(eeepc);
1469 fail_platform:
1470 kfree(eeepc);
1471
1472 return result;
1473 }
1474
1475 static int eeepc_acpi_remove(struct acpi_device *device)
1476 {
1477 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1478
1479 eeepc_backlight_exit(eeepc);
1480 eeepc_rfkill_exit(eeepc);
1481 eeepc_input_exit(eeepc);
1482 eeepc_led_exit(eeepc);
1483 eeepc_platform_exit(eeepc);
1484
1485 kfree(eeepc);
1486 return 0;
1487 }
1488
1489
1490 static const struct acpi_device_id eeepc_device_ids[] = {
1491 {EEEPC_ACPI_HID, 0},
1492 {"", 0},
1493 };
1494 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1495
1496 static struct acpi_driver eeepc_acpi_driver = {
1497 .name = EEEPC_LAPTOP_NAME,
1498 .class = EEEPC_ACPI_CLASS,
1499 .owner = THIS_MODULE,
1500 .ids = eeepc_device_ids,
1501 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1502 .ops = {
1503 .add = eeepc_acpi_add,
1504 .remove = eeepc_acpi_remove,
1505 .notify = eeepc_acpi_notify,
1506 },
1507 };
1508
1509
1510 static int __init eeepc_laptop_init(void)
1511 {
1512 int result;
1513
1514 result = platform_driver_register(&platform_driver);
1515 if (result < 0)
1516 return result;
1517
1518 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1519 if (result < 0)
1520 goto fail_acpi_driver;
1521
1522 if (!eeepc_device_present) {
1523 result = -ENODEV;
1524 goto fail_no_device;
1525 }
1526
1527 return 0;
1528
1529 fail_no_device:
1530 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1531 fail_acpi_driver:
1532 platform_driver_unregister(&platform_driver);
1533 return result;
1534 }
1535
1536 static void __exit eeepc_laptop_exit(void)
1537 {
1538 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1539 platform_driver_unregister(&platform_driver);
1540 }
1541
1542 module_init(eeepc_laptop_init);
1543 module_exit(eeepc_laptop_exit);
CRIS linux kernel tree