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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / platform / x86 / eeepc-laptop.c
blob399e8c5621923890a43ea81f25fde5d0388f152e
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
41 #define EEEPC_LAPTOP_VERSION "0.1"
42 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
43 #define EEEPC_LAPTOP_FILE "eeepc"
44
45 #define EEEPC_ACPI_CLASS "hotkey"
46 #define EEEPC_ACPI_DEVICE_NAME "Hotkey"
47 #define EEEPC_ACPI_HID "ASUS010"
48
49 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
50 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
51 MODULE_LICENSE("GPL");
52
53 static bool hotplug_disabled;
54
55 module_param(hotplug_disabled, bool, 0444);
56 MODULE_PARM_DESC(hotplug_disabled,
57 "Disable hotplug for wireless device. "
58 "If your laptop need that, please report to "
59 "acpi4asus-user@lists.sourceforge.net.");
60
61 /*
62 * Definitions for Asus EeePC
63 */
64 #define NOTIFY_BRN_MIN 0x20
65 #define NOTIFY_BRN_MAX 0x2f
66
67 enum {
68 DISABLE_ASL_WLAN = 0x0001,
69 DISABLE_ASL_BLUETOOTH = 0x0002,
70 DISABLE_ASL_IRDA = 0x0004,
71 DISABLE_ASL_CAMERA = 0x0008,
72 DISABLE_ASL_TV = 0x0010,
73 DISABLE_ASL_GPS = 0x0020,
74 DISABLE_ASL_DISPLAYSWITCH = 0x0040,
75 DISABLE_ASL_MODEM = 0x0080,
76 DISABLE_ASL_CARDREADER = 0x0100,
77 DISABLE_ASL_3G = 0x0200,
78 DISABLE_ASL_WIMAX = 0x0400,
79 DISABLE_ASL_HWCF = 0x0800
80 };
81
82 enum {
83 CM_ASL_WLAN = 0,
84 CM_ASL_BLUETOOTH,
85 CM_ASL_IRDA,
86 CM_ASL_1394,
87 CM_ASL_CAMERA,
88 CM_ASL_TV,
89 CM_ASL_GPS,
90 CM_ASL_DVDROM,
91 CM_ASL_DISPLAYSWITCH,
92 CM_ASL_PANELBRIGHT,
93 CM_ASL_BIOSFLASH,
94 CM_ASL_ACPIFLASH,
95 CM_ASL_CPUFV,
96 CM_ASL_CPUTEMPERATURE,
97 CM_ASL_FANCPU,
98 CM_ASL_FANCHASSIS,
99 CM_ASL_USBPORT1,
100 CM_ASL_USBPORT2,
101 CM_ASL_USBPORT3,
102 CM_ASL_MODEM,
103 CM_ASL_CARDREADER,
104 CM_ASL_3G,
105 CM_ASL_WIMAX,
106 CM_ASL_HWCF,
107 CM_ASL_LID,
108 CM_ASL_TYPE,
109 CM_ASL_PANELPOWER, /*P901*/
110 CM_ASL_TPD
111 };
112
113 static const char *cm_getv[] = {
114 "WLDG", "BTHG", NULL, NULL,
115 "CAMG", NULL, NULL, NULL,
116 NULL, "PBLG", NULL, NULL,
117 "CFVG", NULL, NULL, NULL,
118 "USBG", NULL, NULL, "MODG",
119 "CRDG", "M3GG", "WIMG", "HWCF",
120 "LIDG", "TYPE", "PBPG", "TPDG"
121 };
122
123 static const char *cm_setv[] = {
124 "WLDS", "BTHS", NULL, NULL,
125 "CAMS", NULL, NULL, NULL,
126 "SDSP", "PBLS", "HDPS", NULL,
127 "CFVS", NULL, NULL, NULL,
128 "USBG", NULL, NULL, "MODS",
129 "CRDS", "M3GS", "WIMS", NULL,
130 NULL, NULL, "PBPS", "TPDS"
131 };
132
133 static const struct key_entry eeepc_keymap[] = {
134 { KE_KEY, 0x10, { KEY_WLAN } },
135 { KE_KEY, 0x11, { KEY_WLAN } },
136 { KE_KEY, 0x12, { KEY_PROG1 } },
137 { KE_KEY, 0x13, { KEY_MUTE } },
138 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
139 { KE_KEY, 0x15, { KEY_VOLUMEUP } },
140 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
141 { KE_KEY, 0x1a, { KEY_COFFEE } },
142 { KE_KEY, 0x1b, { KEY_ZOOM } },
143 { KE_KEY, 0x1c, { KEY_PROG2 } },
144 { KE_KEY, 0x1d, { KEY_PROG3 } },
145 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
146 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
147 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
148 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
149 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
150 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
151 { KE_KEY, 0x38, { KEY_F14 } },
152 { KE_END, 0 },
153 };
154
155 /*
156 * This is the main structure, we can use it to store useful information
157 */
158 struct eeepc_laptop {
159 acpi_handle handle; /* the handle of the acpi device */
160 u32 cm_supported; /* the control methods supported
161 by this BIOS */
162 bool cpufv_disabled;
163 bool hotplug_disabled;
164 u16 event_count[128]; /* count for each event */
165
166 struct platform_device *platform_device;
167 struct acpi_device *device; /* the device we are in */
168 struct backlight_device *backlight_device;
169
170 struct input_dev *inputdev;
171
172 struct rfkill *wlan_rfkill;
173 struct rfkill *bluetooth_rfkill;
174 struct rfkill *wwan3g_rfkill;
175 struct rfkill *wimax_rfkill;
176
177 struct hotplug_slot *hotplug_slot;
178 struct mutex hotplug_lock;
179
180 struct led_classdev tpd_led;
181 int tpd_led_wk;
182 struct workqueue_struct *led_workqueue;
183 struct work_struct tpd_led_work;
184 };
185
186 /*
187 * ACPI Helpers
188 */
189 static int write_acpi_int(acpi_handle handle, const char *method, int val)
190 {
191 acpi_status status;
192
193 status = acpi_execute_simple_method(handle, (char *)method, val);
194
195 return (status == AE_OK ? 0 : -1);
196 }
197
198 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
199 {
200 acpi_status status;
201 unsigned long long result;
202
203 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
204 if (ACPI_FAILURE(status)) {
205 *val = -1;
206 return -1;
207 } else {
208 *val = result;
209 return 0;
210 }
211 }
212
213 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
214 {
215 const char *method = cm_setv[cm];
216
217 if (method == NULL)
218 return -ENODEV;
219 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
220 return -ENODEV;
221
222 if (write_acpi_int(eeepc->handle, method, value))
223 pr_warn("Error writing %s\n", method);
224 return 0;
225 }
226
227 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
228 {
229 const char *method = cm_getv[cm];
230 int value;
231
232 if (method == NULL)
233 return -ENODEV;
234 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
235 return -ENODEV;
236
237 if (read_acpi_int(eeepc->handle, method, &value))
238 pr_warn("Error reading %s\n", method);
239 return value;
240 }
241
242 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
243 acpi_handle *handle)
244 {
245 const char *method = cm_setv[cm];
246 acpi_status status;
247
248 if (method == NULL)
249 return -ENODEV;
250 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
251 return -ENODEV;
252
253 status = acpi_get_handle(eeepc->handle, (char *)method,
254 handle);
255 if (status != AE_OK) {
256 pr_warn("Error finding %s\n", method);
257 return -ENODEV;
258 }
259 return 0;
260 }
261
262
263 /*
264 * Sys helpers
265 */
266 static int parse_arg(const char *buf, unsigned long count, int *val)
267 {
268 if (!count)
269 return 0;
270 if (sscanf(buf, "%i", val) != 1)
271 return -EINVAL;
272 return count;
273 }
274
275 static ssize_t store_sys_acpi(struct device *dev, int cm,
276 const char *buf, size_t count)
277 {
278 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
279 int rv, value;
280
281 rv = parse_arg(buf, count, &value);
282 if (rv > 0)
283 value = set_acpi(eeepc, cm, value);
284 if (value < 0)
285 return -EIO;
286 return rv;
287 }
288
289 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
290 {
291 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
292 int value = get_acpi(eeepc, cm);
293
294 if (value < 0)
295 return -EIO;
296 return sprintf(buf, "%d\n", value);
297 }
298
299 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
300 static ssize_t show_##_name(struct device *dev, \
301 struct device_attribute *attr, \
302 char *buf) \
303 { \
304 return show_sys_acpi(dev, _cm, buf); \
305 } \
306 static ssize_t store_##_name(struct device *dev, \
307 struct device_attribute *attr, \
308 const char *buf, size_t count) \
309 { \
310 return store_sys_acpi(dev, _cm, buf, count); \
311 } \
312 static struct device_attribute dev_attr_##_name = { \
313 .attr = { \
314 .name = __stringify(_name), \
315 .mode = _mode }, \
316 .show = show_##_name, \
317 .store = store_##_name, \
318 }
319
320 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
321 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
322 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
323
324 struct eeepc_cpufv {
325 int num;
326 int cur;
327 };
328
329 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
330 {
331 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
332 c->num = (c->cur >> 8) & 0xff;
333 c->cur &= 0xff;
334 if (c->cur < 0 || c->num <= 0 || c->num > 12)
335 return -ENODEV;
336 return 0;
337 }
338
339 static ssize_t show_available_cpufv(struct device *dev,
340 struct device_attribute *attr,
341 char *buf)
342 {
343 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
344 struct eeepc_cpufv c;
345 int i;
346 ssize_t len = 0;
347
348 if (get_cpufv(eeepc, &c))
349 return -ENODEV;
350 for (i = 0; i < c.num; i++)
351 len += sprintf(buf + len, "%d ", i);
352 len += sprintf(buf + len, "\n");
353 return len;
354 }
355
356 static ssize_t show_cpufv(struct device *dev,
357 struct device_attribute *attr,
358 char *buf)
359 {
360 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
361 struct eeepc_cpufv c;
362
363 if (get_cpufv(eeepc, &c))
364 return -ENODEV;
365 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
366 }
367
368 static ssize_t store_cpufv(struct device *dev,
369 struct device_attribute *attr,
370 const char *buf, size_t count)
371 {
372 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
373 struct eeepc_cpufv c;
374 int rv, value;
375
376 if (eeepc->cpufv_disabled)
377 return -EPERM;
378 if (get_cpufv(eeepc, &c))
379 return -ENODEV;
380 rv = parse_arg(buf, count, &value);
381 if (rv < 0)
382 return rv;
383 if (!rv || value < 0 || value >= c.num)
384 return -EINVAL;
385 set_acpi(eeepc, CM_ASL_CPUFV, value);
386 return rv;
387 }
388
389 static ssize_t show_cpufv_disabled(struct device *dev,
390 struct device_attribute *attr,
391 char *buf)
392 {
393 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
394
395 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
396 }
397
398 static ssize_t store_cpufv_disabled(struct device *dev,
399 struct device_attribute *attr,
400 const char *buf, size_t count)
401 {
402 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
403 int rv, value;
404
405 rv = parse_arg(buf, count, &value);
406 if (rv < 0)
407 return rv;
408
409 switch (value) {
410 case 0:
411 if (eeepc->cpufv_disabled)
412 pr_warn("cpufv enabled (not officially supported "
413 "on this model)\n");
414 eeepc->cpufv_disabled = false;
415 return rv;
416 case 1:
417 return -EPERM;
418 default:
419 return -EINVAL;
420 }
421 }
422
423
424 static struct device_attribute dev_attr_cpufv = {
425 .attr = {
426 .name = "cpufv",
427 .mode = 0644 },
428 .show = show_cpufv,
429 .store = store_cpufv
430 };
431
432 static struct device_attribute dev_attr_available_cpufv = {
433 .attr = {
434 .name = "available_cpufv",
435 .mode = 0444 },
436 .show = show_available_cpufv
437 };
438
439 static struct device_attribute dev_attr_cpufv_disabled = {
440 .attr = {
441 .name = "cpufv_disabled",
442 .mode = 0644 },
443 .show = show_cpufv_disabled,
444 .store = store_cpufv_disabled
445 };
446
447
448 static struct attribute *platform_attributes[] = {
449 &dev_attr_camera.attr,
450 &dev_attr_cardr.attr,
451 &dev_attr_disp.attr,
452 &dev_attr_cpufv.attr,
453 &dev_attr_available_cpufv.attr,
454 &dev_attr_cpufv_disabled.attr,
455 NULL
456 };
457
458 static struct attribute_group platform_attribute_group = {
459 .attrs = platform_attributes
460 };
461
462 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
463 {
464 int result;
465
466 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
467 if (!eeepc->platform_device)
468 return -ENOMEM;
469 platform_set_drvdata(eeepc->platform_device, eeepc);
470
471 result = platform_device_add(eeepc->platform_device);
472 if (result)
473 goto fail_platform_device;
474
475 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
476 &platform_attribute_group);
477 if (result)
478 goto fail_sysfs;
479 return 0;
480
481 fail_sysfs:
482 platform_device_del(eeepc->platform_device);
483 fail_platform_device:
484 platform_device_put(eeepc->platform_device);
485 return result;
486 }
487
488 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
489 {
490 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
491 &platform_attribute_group);
492 platform_device_unregister(eeepc->platform_device);
493 }
494
495 /*
496 * LEDs
497 */
498 /*
499 * These functions actually update the LED's, and are called from a
500 * workqueue. By doing this as separate work rather than when the LED
501 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
502 * potentially bad time, such as a timer interrupt.
503 */
504 static void tpd_led_update(struct work_struct *work)
505 {
506 struct eeepc_laptop *eeepc;
507
508 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
509
510 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
511 }
512
513 static void tpd_led_set(struct led_classdev *led_cdev,
514 enum led_brightness value)
515 {
516 struct eeepc_laptop *eeepc;
517
518 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
519
520 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
521 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
522 }
523
524 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
525 {
526 struct eeepc_laptop *eeepc;
527
528 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
529
530 return get_acpi(eeepc, CM_ASL_TPD);
531 }
532
533 static int eeepc_led_init(struct eeepc_laptop *eeepc)
534 {
535 int rv;
536
537 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
538 return 0;
539
540 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
541 if (!eeepc->led_workqueue)
542 return -ENOMEM;
543 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
544
545 eeepc->tpd_led.name = "eeepc::touchpad";
546 eeepc->tpd_led.brightness_set = tpd_led_set;
547 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
548 eeepc->tpd_led.brightness_get = tpd_led_get;
549 eeepc->tpd_led.max_brightness = 1;
550
551 rv = led_classdev_register(&eeepc->platform_device->dev,
552 &eeepc->tpd_led);
553 if (rv) {
554 destroy_workqueue(eeepc->led_workqueue);
555 return rv;
556 }
557
558 return 0;
559 }
560
561 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
562 {
563 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
564 led_classdev_unregister(&eeepc->tpd_led);
565 if (eeepc->led_workqueue)
566 destroy_workqueue(eeepc->led_workqueue);
567 }
568
569
570 /*
571 * PCI hotplug (for wlan rfkill)
572 */
573 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
574 {
575 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
576 return false;
577 return true;
578 }
579
580 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
581 {
582 struct pci_dev *port;
583 struct pci_dev *dev;
584 struct pci_bus *bus;
585 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
586 bool absent;
587 u32 l;
588
589 if (eeepc->wlan_rfkill)
590 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
591
592 mutex_lock(&eeepc->hotplug_lock);
593 pci_lock_rescan_remove();
594
595 if (eeepc->hotplug_slot) {
596 port = acpi_get_pci_dev(handle);
597 if (!port) {
598 pr_warning("Unable to find port\n");
599 goto out_unlock;
600 }
601
602 bus = port->subordinate;
603
604 if (!bus) {
605 pr_warn("Unable to find PCI bus 1?\n");
606 goto out_put_dev;
607 }
608
609 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
610 pr_err("Unable to read PCI config space?\n");
611 goto out_put_dev;
612 }
613
614 absent = (l == 0xffffffff);
615
616 if (blocked != absent) {
617 pr_warn("BIOS says wireless lan is %s, "
618 "but the pci device is %s\n",
619 blocked ? "blocked" : "unblocked",
620 absent ? "absent" : "present");
621 pr_warn("skipped wireless hotplug as probably "
622 "inappropriate for this model\n");
623 goto out_put_dev;
624 }
625
626 if (!blocked) {
627 dev = pci_get_slot(bus, 0);
628 if (dev) {
629 /* Device already present */
630 pci_dev_put(dev);
631 goto out_put_dev;
632 }
633 dev = pci_scan_single_device(bus, 0);
634 if (dev) {
635 pci_bus_assign_resources(bus);
636 if (pci_bus_add_device(dev))
637 pr_err("Unable to hotplug wifi\n");
638 }
639 } else {
640 dev = pci_get_slot(bus, 0);
641 if (dev) {
642 pci_stop_and_remove_bus_device(dev);
643 pci_dev_put(dev);
644 }
645 }
646 out_put_dev:
647 pci_dev_put(port);
648 }
649
650 out_unlock:
651 pci_unlock_rescan_remove();
652 mutex_unlock(&eeepc->hotplug_lock);
653 }
654
655 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
656 {
657 acpi_status status = AE_OK;
658 acpi_handle handle;
659
660 status = acpi_get_handle(NULL, node, &handle);
661
662 if (ACPI_SUCCESS(status))
663 eeepc_rfkill_hotplug(eeepc, handle);
664 }
665
666 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
667 {
668 struct eeepc_laptop *eeepc = data;
669
670 if (event != ACPI_NOTIFY_BUS_CHECK)
671 return;
672
673 eeepc_rfkill_hotplug(eeepc, handle);
674 }
675
676 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
677 char *node)
678 {
679 acpi_status status;
680 acpi_handle handle;
681
682 status = acpi_get_handle(NULL, node, &handle);
683
684 if (ACPI_SUCCESS(status)) {
685 status = acpi_install_notify_handler(handle,
686 ACPI_SYSTEM_NOTIFY,
687 eeepc_rfkill_notify,
688 eeepc);
689 if (ACPI_FAILURE(status))
690 pr_warn("Failed to register notify on %s\n", node);
691
692 /*
693 * Refresh pci hotplug in case the rfkill state was
694 * changed during setup.
695 */
696 eeepc_rfkill_hotplug(eeepc, handle);
697 } else
698 return -ENODEV;
699
700 return 0;
701 }
702
703 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
704 char *node)
705 {
706 acpi_status status = AE_OK;
707 acpi_handle handle;
708
709 status = acpi_get_handle(NULL, node, &handle);
710
711 if (ACPI_SUCCESS(status)) {
712 status = acpi_remove_notify_handler(handle,
713 ACPI_SYSTEM_NOTIFY,
714 eeepc_rfkill_notify);
715 if (ACPI_FAILURE(status))
716 pr_err("Error removing rfkill notify handler %s\n",
717 node);
718 /*
719 * Refresh pci hotplug in case the rfkill
720 * state was changed after
721 * eeepc_unregister_rfkill_notifier()
722 */
723 eeepc_rfkill_hotplug(eeepc, handle);
724 }
725 }
726
727 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
728 u8 *value)
729 {
730 struct eeepc_laptop *eeepc = hotplug_slot->private;
731 int val = get_acpi(eeepc, CM_ASL_WLAN);
732
733 if (val == 1 || val == 0)
734 *value = val;
735 else
736 return -EINVAL;
737
738 return 0;
739 }
740
741 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
742 {
743 kfree(hotplug_slot->info);
744 kfree(hotplug_slot);
745 }
746
747 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
748 .owner = THIS_MODULE,
749 .get_adapter_status = eeepc_get_adapter_status,
750 .get_power_status = eeepc_get_adapter_status,
751 };
752
753 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
754 {
755 int ret = -ENOMEM;
756 struct pci_bus *bus = pci_find_bus(0, 1);
757
758 if (!bus) {
759 pr_err("Unable to find wifi PCI bus\n");
760 return -ENODEV;
761 }
762
763 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
764 if (!eeepc->hotplug_slot)
765 goto error_slot;
766
767 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
768 GFP_KERNEL);
769 if (!eeepc->hotplug_slot->info)
770 goto error_info;
771
772 eeepc->hotplug_slot->private = eeepc;
773 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
774 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
775 eeepc_get_adapter_status(eeepc->hotplug_slot,
776 &eeepc->hotplug_slot->info->adapter_status);
777
778 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
779 if (ret) {
780 pr_err("Unable to register hotplug slot - %d\n", ret);
781 goto error_register;
782 }
783
784 return 0;
785
786 error_register:
787 kfree(eeepc->hotplug_slot->info);
788 error_info:
789 kfree(eeepc->hotplug_slot);
790 eeepc->hotplug_slot = NULL;
791 error_slot:
792 return ret;
793 }
794
795 /*
796 * Rfkill devices
797 */
798 static int eeepc_rfkill_set(void *data, bool blocked)
799 {
800 acpi_handle handle = data;
801
802 return write_acpi_int(handle, NULL, !blocked);
803 }
804
805 static const struct rfkill_ops eeepc_rfkill_ops = {
806 .set_block = eeepc_rfkill_set,
807 };
808
809 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
810 struct rfkill **rfkill,
811 const char *name,
812 enum rfkill_type type, int cm)
813 {
814 acpi_handle handle;
815 int result;
816
817 result = acpi_setter_handle(eeepc, cm, &handle);
818 if (result < 0)
819 return result;
820
821 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
822 &eeepc_rfkill_ops, handle);
823
824 if (!*rfkill)
825 return -EINVAL;
826
827 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
828 result = rfkill_register(*rfkill);
829 if (result) {
830 rfkill_destroy(*rfkill);
831 *rfkill = NULL;
832 return result;
833 }
834 return 0;
835 }
836
837 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
838 {
839 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
840 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
841 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
842 if (eeepc->wlan_rfkill) {
843 rfkill_unregister(eeepc->wlan_rfkill);
844 rfkill_destroy(eeepc->wlan_rfkill);
845 eeepc->wlan_rfkill = NULL;
846 }
847
848 if (eeepc->hotplug_slot)
849 pci_hp_deregister(eeepc->hotplug_slot);
850
851 if (eeepc->bluetooth_rfkill) {
852 rfkill_unregister(eeepc->bluetooth_rfkill);
853 rfkill_destroy(eeepc->bluetooth_rfkill);
854 eeepc->bluetooth_rfkill = NULL;
855 }
856 if (eeepc->wwan3g_rfkill) {
857 rfkill_unregister(eeepc->wwan3g_rfkill);
858 rfkill_destroy(eeepc->wwan3g_rfkill);
859 eeepc->wwan3g_rfkill = NULL;
860 }
861 if (eeepc->wimax_rfkill) {
862 rfkill_unregister(eeepc->wimax_rfkill);
863 rfkill_destroy(eeepc->wimax_rfkill);
864 eeepc->wimax_rfkill = NULL;
865 }
866 }
867
868 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
869 {
870 int result = 0;
871
872 mutex_init(&eeepc->hotplug_lock);
873
874 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
875 "eeepc-wlan", RFKILL_TYPE_WLAN,
876 CM_ASL_WLAN);
877
878 if (result && result != -ENODEV)
879 goto exit;
880
881 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
882 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
883 CM_ASL_BLUETOOTH);
884
885 if (result && result != -ENODEV)
886 goto exit;
887
888 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
889 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
890 CM_ASL_3G);
891
892 if (result && result != -ENODEV)
893 goto exit;
894
895 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
896 "eeepc-wimax", RFKILL_TYPE_WIMAX,
897 CM_ASL_WIMAX);
898
899 if (result && result != -ENODEV)
900 goto exit;
901
902 if (eeepc->hotplug_disabled)
903 return 0;
904
905 result = eeepc_setup_pci_hotplug(eeepc);
906 /*
907 * If we get -EBUSY then something else is handling the PCI hotplug -
908 * don't fail in this case
909 */
910 if (result == -EBUSY)
911 result = 0;
912
913 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
914 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
915 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
916
917 exit:
918 if (result && result != -ENODEV)
919 eeepc_rfkill_exit(eeepc);
920 return result;
921 }
922
923 /*
924 * Platform driver - hibernate/resume callbacks
925 */
926 static int eeepc_hotk_thaw(struct device *device)
927 {
928 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
929
930 if (eeepc->wlan_rfkill) {
931 bool wlan;
932
933 /*
934 * Work around bios bug - acpi _PTS turns off the wireless led
935 * during suspend. Normally it restores it on resume, but
936 * we should kick it ourselves in case hibernation is aborted.
937 */
938 wlan = get_acpi(eeepc, CM_ASL_WLAN);
939 set_acpi(eeepc, CM_ASL_WLAN, wlan);
940 }
941
942 return 0;
943 }
944
945 static int eeepc_hotk_restore(struct device *device)
946 {
947 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
948
949 /* Refresh both wlan rfkill state and pci hotplug */
950 if (eeepc->wlan_rfkill) {
951 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5");
952 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6");
953 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7");
954 }
955
956 if (eeepc->bluetooth_rfkill)
957 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
958 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
959 if (eeepc->wwan3g_rfkill)
960 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
961 get_acpi(eeepc, CM_ASL_3G) != 1);
962 if (eeepc->wimax_rfkill)
963 rfkill_set_sw_state(eeepc->wimax_rfkill,
964 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
965
966 return 0;
967 }
968
969 static const struct dev_pm_ops eeepc_pm_ops = {
970 .thaw = eeepc_hotk_thaw,
971 .restore = eeepc_hotk_restore,
972 };
973
974 static struct platform_driver platform_driver = {
975 .driver = {
976 .name = EEEPC_LAPTOP_FILE,
977 .owner = THIS_MODULE,
978 .pm = &eeepc_pm_ops,
979 }
980 };
981
982 /*
983 * Hwmon device
984 */
985
986 #define EEEPC_EC_SC00 0x61
987 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
988 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
989 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
990
991 #define EEEPC_EC_SFB0 0xD0
992 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
993
994 static int eeepc_get_fan_pwm(void)
995 {
996 u8 value = 0;
997
998 ec_read(EEEPC_EC_FAN_PWM, &value);
999 return value * 255 / 100;
1000 }
1001
1002 static void eeepc_set_fan_pwm(int value)
1003 {
1004 value = clamp_val(value, 0, 255);
1005 value = value * 100 / 255;
1006 ec_write(EEEPC_EC_FAN_PWM, value);
1007 }
1008
1009 static int eeepc_get_fan_rpm(void)
1010 {
1011 u8 high = 0;
1012 u8 low = 0;
1013
1014 ec_read(EEEPC_EC_FAN_HRPM, &high);
1015 ec_read(EEEPC_EC_FAN_LRPM, &low);
1016 return high << 8 | low;
1017 }
1018
1019 static int eeepc_get_fan_ctrl(void)
1020 {
1021 u8 value = 0;
1022
1023 ec_read(EEEPC_EC_FAN_CTRL, &value);
1024 if (value & 0x02)
1025 return 1; /* manual */
1026 else
1027 return 2; /* automatic */
1028 }
1029
1030 static void eeepc_set_fan_ctrl(int manual)
1031 {
1032 u8 value = 0;
1033
1034 ec_read(EEEPC_EC_FAN_CTRL, &value);
1035 if (manual == 1)
1036 value |= 0x02;
1037 else
1038 value &= ~0x02;
1039 ec_write(EEEPC_EC_FAN_CTRL, value);
1040 }
1041
1042 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1043 {
1044 int rv, value;
1045
1046 rv = parse_arg(buf, count, &value);
1047 if (rv > 0)
1048 set(value);
1049 return rv;
1050 }
1051
1052 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1053 {
1054 return sprintf(buf, "%d\n", get());
1055 }
1056
1057 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
1058 static ssize_t show_##_name(struct device *dev, \
1059 struct device_attribute *attr, \
1060 char *buf) \
1061 { \
1062 return show_sys_hwmon(_set, buf); \
1063 } \
1064 static ssize_t store_##_name(struct device *dev, \
1065 struct device_attribute *attr, \
1066 const char *buf, size_t count) \
1067 { \
1068 return store_sys_hwmon(_get, buf, count); \
1069 } \
1070 static DEVICE_ATTR(_name, _mode, show_##_name, store_##_name);
1071
1072 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
1073 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
1074 eeepc_get_fan_pwm, eeepc_set_fan_pwm);
1075 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1076 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
1077
1078 static struct attribute *hwmon_attrs[] = {
1079 &dev_attr_pwm1.attr,
1080 &dev_attr_fan1_input.attr,
1081 &dev_attr_pwm1_enable.attr,
1082 NULL
1083 };
1084 ATTRIBUTE_GROUPS(hwmon);
1085
1086 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1087 {
1088 struct device *dev = &eeepc->platform_device->dev;
1089 struct device *hwmon;
1090
1091 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1092 hwmon_groups);
1093 if (IS_ERR(hwmon)) {
1094 pr_err("Could not register eeepc hwmon device\n");
1095 return PTR_ERR(hwmon);
1096 }
1097 return 0;
1098 }
1099
1100 /*
1101 * Backlight device
1102 */
1103 static int read_brightness(struct backlight_device *bd)
1104 {
1105 struct eeepc_laptop *eeepc = bl_get_data(bd);
1106
1107 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1108 }
1109
1110 static int set_brightness(struct backlight_device *bd, int value)
1111 {
1112 struct eeepc_laptop *eeepc = bl_get_data(bd);
1113
1114 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1115 }
1116
1117 static int update_bl_status(struct backlight_device *bd)
1118 {
1119 return set_brightness(bd, bd->props.brightness);
1120 }
1121
1122 static const struct backlight_ops eeepcbl_ops = {
1123 .get_brightness = read_brightness,
1124 .update_status = update_bl_status,
1125 };
1126
1127 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1128 {
1129 struct backlight_device *bd = eeepc->backlight_device;
1130 int old = bd->props.brightness;
1131
1132 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1133
1134 return old;
1135 }
1136
1137 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1138 {
1139 struct backlight_properties props;
1140 struct backlight_device *bd;
1141
1142 memset(&props, 0, sizeof(struct backlight_properties));
1143 props.type = BACKLIGHT_PLATFORM;
1144 props.max_brightness = 15;
1145 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1146 &eeepc->platform_device->dev, eeepc,
1147 &eeepcbl_ops, &props);
1148 if (IS_ERR(bd)) {
1149 pr_err("Could not register eeepc backlight device\n");
1150 eeepc->backlight_device = NULL;
1151 return PTR_ERR(bd);
1152 }
1153 eeepc->backlight_device = bd;
1154 bd->props.brightness = read_brightness(bd);
1155 bd->props.power = FB_BLANK_UNBLANK;
1156 backlight_update_status(bd);
1157 return 0;
1158 }
1159
1160 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1161 {
1162 if (eeepc->backlight_device)
1163 backlight_device_unregister(eeepc->backlight_device);
1164 eeepc->backlight_device = NULL;
1165 }
1166
1167
1168 /*
1169 * Input device (i.e. hotkeys)
1170 */
1171 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1172 {
1173 struct input_dev *input;
1174 int error;
1175
1176 input = input_allocate_device();
1177 if (!input)
1178 return -ENOMEM;
1179
1180 input->name = "Asus EeePC extra buttons";
1181 input->phys = EEEPC_LAPTOP_FILE "/input0";
1182 input->id.bustype = BUS_HOST;
1183 input->dev.parent = &eeepc->platform_device->dev;
1184
1185 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1186 if (error) {
1187 pr_err("Unable to setup input device keymap\n");
1188 goto err_free_dev;
1189 }
1190
1191 error = input_register_device(input);
1192 if (error) {
1193 pr_err("Unable to register input device\n");
1194 goto err_free_keymap;
1195 }
1196
1197 eeepc->inputdev = input;
1198 return 0;
1199
1200 err_free_keymap:
1201 sparse_keymap_free(input);
1202 err_free_dev:
1203 input_free_device(input);
1204 return error;
1205 }
1206
1207 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1208 {
1209 if (eeepc->inputdev) {
1210 sparse_keymap_free(eeepc->inputdev);
1211 input_unregister_device(eeepc->inputdev);
1212 }
1213 eeepc->inputdev = NULL;
1214 }
1215
1216 /*
1217 * ACPI driver
1218 */
1219 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1220 {
1221 if (!eeepc->inputdev)
1222 return ;
1223 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1224 pr_info("Unknown key %x pressed\n", event);
1225 }
1226
1227 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1228 {
1229 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1230 u16 count;
1231
1232 if (event > ACPI_MAX_SYS_NOTIFY)
1233 return;
1234 count = eeepc->event_count[event % 128]++;
1235 acpi_bus_generate_netlink_event(device->pnp.device_class,
1236 dev_name(&device->dev), event,
1237 count);
1238
1239 /* Brightness events are special */
1240 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
1241
1242 /* Ignore them completely if the acpi video driver is used */
1243 if (eeepc->backlight_device != NULL) {
1244 int old_brightness, new_brightness;
1245
1246 /* Update the backlight device. */
1247 old_brightness = eeepc_backlight_notify(eeepc);
1248
1249 /* Convert event to keypress (obsolescent hack) */
1250 new_brightness = event - NOTIFY_BRN_MIN;
1251
1252 if (new_brightness < old_brightness) {
1253 event = NOTIFY_BRN_MIN; /* brightness down */
1254 } else if (new_brightness > old_brightness) {
1255 event = NOTIFY_BRN_MAX; /* brightness up */
1256 } else {
1257 /*
1258 * no change in brightness - already at min/max,
1259 * event will be desired value (or else ignored)
1260 */
1261 }
1262 eeepc_input_notify(eeepc, event);
1263 }
1264 } else {
1265 /* Everything else is a bona-fide keypress event */
1266 eeepc_input_notify(eeepc, event);
1267 }
1268 }
1269
1270 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1271 {
1272 const char *model;
1273
1274 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1275 if (!model)
1276 return;
1277
1278 /*
1279 * Blacklist for setting cpufv (cpu speed).
1280 *
1281 * EeePC 4G ("701") implements CFVS, but it is not supported
1282 * by the pre-installed OS, and the original option to change it
1283 * in the BIOS setup screen was removed in later versions.
1284 *
1285 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1286 * this applies to all "701" models (4G/4G Surf/2G Surf).
1287 *
1288 * So Asus made a deliberate decision not to support it on this model.
1289 * We have several reports that using it can cause the system to hang
1290 *
1291 * The hang has also been reported on a "702" (Model name "8G"?).
1292 *
1293 * We avoid dmi_check_system() / dmi_match(), because they use
1294 * substring matching. We don't want to affect the "701SD"
1295 * and "701SDX" models, because they do support S.H.E.
1296 */
1297 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1298 eeepc->cpufv_disabled = true;
1299 pr_info("model %s does not officially support setting cpu "
1300 "speed\n", model);
1301 pr_info("cpufv disabled to avoid instability\n");
1302 }
1303
1304 /*
1305 * Blacklist for wlan hotplug
1306 *
1307 * Eeepc 1005HA doesn't work like others models and don't need the
1308 * hotplug code. In fact, current hotplug code seems to unplug another
1309 * device...
1310 */
1311 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1312 strcmp(model, "1005PE") == 0) {
1313 eeepc->hotplug_disabled = true;
1314 pr_info("wlan hotplug disabled\n");
1315 }
1316 }
1317
1318 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1319 {
1320 int dummy;
1321
1322 /* Some BIOSes do not report cm although it is available.
1323 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1324 if (!(eeepc->cm_supported & (1 << cm))
1325 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1326 pr_info("%s (%x) not reported by BIOS,"
1327 " enabling anyway\n", name, 1 << cm);
1328 eeepc->cm_supported |= 1 << cm;
1329 }
1330 }
1331
1332 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1333 {
1334 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1335 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1336 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1337 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1338 }
1339
1340 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1341 {
1342 unsigned int init_flags;
1343 int result;
1344
1345 result = acpi_bus_get_status(eeepc->device);
1346 if (result)
1347 return result;
1348 if (!eeepc->device->status.present) {
1349 pr_err("Hotkey device not present, aborting\n");
1350 return -ENODEV;
1351 }
1352
1353 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1354 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1355
1356 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1357 pr_err("Hotkey initialization failed\n");
1358 return -ENODEV;
1359 }
1360
1361 /* get control methods supported */
1362 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1363 pr_err("Get control methods supported failed\n");
1364 return -ENODEV;
1365 }
1366 cmsg_quirks(eeepc);
1367 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1368
1369 return 0;
1370 }
1371
1372 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1373 {
1374 /*
1375 * If the following call to set_acpi() fails, it's because there's no
1376 * camera so we can ignore the error.
1377 */
1378 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1379 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1380 }
1381
1382 static bool eeepc_device_present;
1383
1384 static int eeepc_acpi_add(struct acpi_device *device)
1385 {
1386 struct eeepc_laptop *eeepc;
1387 int result;
1388
1389 pr_notice(EEEPC_LAPTOP_NAME "\n");
1390 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1391 if (!eeepc)
1392 return -ENOMEM;
1393 eeepc->handle = device->handle;
1394 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1395 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1396 device->driver_data = eeepc;
1397 eeepc->device = device;
1398
1399 eeepc->hotplug_disabled = hotplug_disabled;
1400
1401 eeepc_dmi_check(eeepc);
1402
1403 result = eeepc_acpi_init(eeepc);
1404 if (result)
1405 goto fail_platform;
1406 eeepc_enable_camera(eeepc);
1407
1408 /*
1409 * Register the platform device first. It is used as a parent for the
1410 * sub-devices below.
1411 *
1412 * Note that if there are multiple instances of this ACPI device it
1413 * will bail out, because the platform device is registered with a
1414 * fixed name. Of course it doesn't make sense to have more than one,
1415 * and machine-specific scripts find the fixed name convenient. But
1416 * It's also good for us to exclude multiple instances because both
1417 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1418 * (the EC and the wlan PCI slot respectively).
1419 */
1420 result = eeepc_platform_init(eeepc);
1421 if (result)
1422 goto fail_platform;
1423
1424 if (!acpi_video_backlight_support()) {
1425 result = eeepc_backlight_init(eeepc);
1426 if (result)
1427 goto fail_backlight;
1428 } else
1429 pr_info("Backlight controlled by ACPI video driver\n");
1430
1431 result = eeepc_input_init(eeepc);
1432 if (result)
1433 goto fail_input;
1434
1435 result = eeepc_hwmon_init(eeepc);
1436 if (result)
1437 goto fail_hwmon;
1438
1439 result = eeepc_led_init(eeepc);
1440 if (result)
1441 goto fail_led;
1442
1443 result = eeepc_rfkill_init(eeepc);
1444 if (result)
1445 goto fail_rfkill;
1446
1447 eeepc_device_present = true;
1448 return 0;
1449
1450 fail_rfkill:
1451 eeepc_led_exit(eeepc);
1452 fail_led:
1453 fail_hwmon:
1454 eeepc_input_exit(eeepc);
1455 fail_input:
1456 eeepc_backlight_exit(eeepc);
1457 fail_backlight:
1458 eeepc_platform_exit(eeepc);
1459 fail_platform:
1460 kfree(eeepc);
1461
1462 return result;
1463 }
1464
1465 static int eeepc_acpi_remove(struct acpi_device *device)
1466 {
1467 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1468
1469 eeepc_backlight_exit(eeepc);
1470 eeepc_rfkill_exit(eeepc);
1471 eeepc_input_exit(eeepc);
1472 eeepc_led_exit(eeepc);
1473 eeepc_platform_exit(eeepc);
1474
1475 kfree(eeepc);
1476 return 0;
1477 }
1478
1479
1480 static const struct acpi_device_id eeepc_device_ids[] = {
1481 {EEEPC_ACPI_HID, 0},
1482 {"", 0},
1483 };
1484 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1485
1486 static struct acpi_driver eeepc_acpi_driver = {
1487 .name = EEEPC_LAPTOP_NAME,
1488 .class = EEEPC_ACPI_CLASS,
1489 .owner = THIS_MODULE,
1490 .ids = eeepc_device_ids,
1491 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1492 .ops = {
1493 .add = eeepc_acpi_add,
1494 .remove = eeepc_acpi_remove,
1495 .notify = eeepc_acpi_notify,
1496 },
1497 };
1498
1499
1500 static int __init eeepc_laptop_init(void)
1501 {
1502 int result;
1503
1504 result = platform_driver_register(&platform_driver);
1505 if (result < 0)
1506 return result;
1507
1508 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1509 if (result < 0)
1510 goto fail_acpi_driver;
1511
1512 if (!eeepc_device_present) {
1513 result = -ENODEV;
1514 goto fail_no_device;
1515 }
1516
1517 return 0;
1518
1519 fail_no_device:
1520 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1521 fail_acpi_driver:
1522 platform_driver_unregister(&platform_driver);
1523 return result;
1524 }
1525
1526 static void __exit eeepc_laptop_exit(void)
1527 {
1528 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1529 platform_driver_unregister(&platform_driver);
1530 }
1531
1532 module_init(eeepc_laptop_init);
1533 module_exit(eeepc_laptop_exit);
Linux with added FPC-III support