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Merge tag 'v3.6-rc7' into drm-intel-next-queued
[deliverable/linux.git] / drivers / platform / x86 / eeepc-laptop.c
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 <acpi/acpi_drivers.h>
32 #include <acpi/acpi_bus.h>
33 #include <linux/uaccess.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/rfkill.h>
37 #include <linux/pci.h>
38 #include <linux/pci_hotplug.h>
39 #include <linux/leds.h>
40 #include <linux/dmi.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_END, 0 },
154 };
155
156 /*
157 * This is the main structure, we can use it to store useful information
158 */
159 struct eeepc_laptop {
160 acpi_handle handle; /* the handle of the acpi device */
161 u32 cm_supported; /* the control methods supported
162 by this BIOS */
163 bool cpufv_disabled;
164 bool hotplug_disabled;
165 u16 event_count[128]; /* count for each event */
166
167 struct platform_device *platform_device;
168 struct acpi_device *device; /* the device we are in */
169 struct device *hwmon_device;
170 struct backlight_device *backlight_device;
171
172 struct input_dev *inputdev;
173
174 struct rfkill *wlan_rfkill;
175 struct rfkill *bluetooth_rfkill;
176 struct rfkill *wwan3g_rfkill;
177 struct rfkill *wimax_rfkill;
178
179 struct hotplug_slot *hotplug_slot;
180 struct mutex hotplug_lock;
181
182 struct led_classdev tpd_led;
183 int tpd_led_wk;
184 struct workqueue_struct *led_workqueue;
185 struct work_struct tpd_led_work;
186 };
187
188 /*
189 * ACPI Helpers
190 */
191 static int write_acpi_int(acpi_handle handle, const char *method, int val)
192 {
193 struct acpi_object_list params;
194 union acpi_object in_obj;
195 acpi_status status;
196
197 params.count = 1;
198 params.pointer = &in_obj;
199 in_obj.type = ACPI_TYPE_INTEGER;
200 in_obj.integer.value = val;
201
202 status = acpi_evaluate_object(handle, (char *)method, &params, NULL);
203 return (status == AE_OK ? 0 : -1);
204 }
205
206 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
207 {
208 acpi_status status;
209 unsigned long long result;
210
211 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
212 if (ACPI_FAILURE(status)) {
213 *val = -1;
214 return -1;
215 } else {
216 *val = result;
217 return 0;
218 }
219 }
220
221 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
222 {
223 const char *method = cm_setv[cm];
224
225 if (method == NULL)
226 return -ENODEV;
227 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
228 return -ENODEV;
229
230 if (write_acpi_int(eeepc->handle, method, value))
231 pr_warn("Error writing %s\n", method);
232 return 0;
233 }
234
235 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
236 {
237 const char *method = cm_getv[cm];
238 int value;
239
240 if (method == NULL)
241 return -ENODEV;
242 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
243 return -ENODEV;
244
245 if (read_acpi_int(eeepc->handle, method, &value))
246 pr_warn("Error reading %s\n", method);
247 return value;
248 }
249
250 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
251 acpi_handle *handle)
252 {
253 const char *method = cm_setv[cm];
254 acpi_status status;
255
256 if (method == NULL)
257 return -ENODEV;
258 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
259 return -ENODEV;
260
261 status = acpi_get_handle(eeepc->handle, (char *)method,
262 handle);
263 if (status != AE_OK) {
264 pr_warn("Error finding %s\n", method);
265 return -ENODEV;
266 }
267 return 0;
268 }
269
270
271 /*
272 * Sys helpers
273 */
274 static int parse_arg(const char *buf, unsigned long count, int *val)
275 {
276 if (!count)
277 return 0;
278 if (sscanf(buf, "%i", val) != 1)
279 return -EINVAL;
280 return count;
281 }
282
283 static ssize_t store_sys_acpi(struct device *dev, int cm,
284 const char *buf, size_t count)
285 {
286 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
287 int rv, value;
288
289 rv = parse_arg(buf, count, &value);
290 if (rv > 0)
291 value = set_acpi(eeepc, cm, value);
292 if (value < 0)
293 return -EIO;
294 return rv;
295 }
296
297 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
298 {
299 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
300 int value = get_acpi(eeepc, cm);
301
302 if (value < 0)
303 return -EIO;
304 return sprintf(buf, "%d\n", value);
305 }
306
307 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
308 static ssize_t show_##_name(struct device *dev, \
309 struct device_attribute *attr, \
310 char *buf) \
311 { \
312 return show_sys_acpi(dev, _cm, buf); \
313 } \
314 static ssize_t store_##_name(struct device *dev, \
315 struct device_attribute *attr, \
316 const char *buf, size_t count) \
317 { \
318 return store_sys_acpi(dev, _cm, buf, count); \
319 } \
320 static struct device_attribute dev_attr_##_name = { \
321 .attr = { \
322 .name = __stringify(_name), \
323 .mode = _mode }, \
324 .show = show_##_name, \
325 .store = store_##_name, \
326 }
327
328 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
329 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
330 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
331
332 struct eeepc_cpufv {
333 int num;
334 int cur;
335 };
336
337 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
338 {
339 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
340 c->num = (c->cur >> 8) & 0xff;
341 c->cur &= 0xff;
342 if (c->cur < 0 || c->num <= 0 || c->num > 12)
343 return -ENODEV;
344 return 0;
345 }
346
347 static ssize_t show_available_cpufv(struct device *dev,
348 struct device_attribute *attr,
349 char *buf)
350 {
351 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
352 struct eeepc_cpufv c;
353 int i;
354 ssize_t len = 0;
355
356 if (get_cpufv(eeepc, &c))
357 return -ENODEV;
358 for (i = 0; i < c.num; i++)
359 len += sprintf(buf + len, "%d ", i);
360 len += sprintf(buf + len, "\n");
361 return len;
362 }
363
364 static ssize_t show_cpufv(struct device *dev,
365 struct device_attribute *attr,
366 char *buf)
367 {
368 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
369 struct eeepc_cpufv c;
370
371 if (get_cpufv(eeepc, &c))
372 return -ENODEV;
373 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
374 }
375
376 static ssize_t store_cpufv(struct device *dev,
377 struct device_attribute *attr,
378 const char *buf, size_t count)
379 {
380 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
381 struct eeepc_cpufv c;
382 int rv, value;
383
384 if (eeepc->cpufv_disabled)
385 return -EPERM;
386 if (get_cpufv(eeepc, &c))
387 return -ENODEV;
388 rv = parse_arg(buf, count, &value);
389 if (rv < 0)
390 return rv;
391 if (!rv || value < 0 || value >= c.num)
392 return -EINVAL;
393 set_acpi(eeepc, CM_ASL_CPUFV, value);
394 return rv;
395 }
396
397 static ssize_t show_cpufv_disabled(struct device *dev,
398 struct device_attribute *attr,
399 char *buf)
400 {
401 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
402
403 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
404 }
405
406 static ssize_t store_cpufv_disabled(struct device *dev,
407 struct device_attribute *attr,
408 const char *buf, size_t count)
409 {
410 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
411 int rv, value;
412
413 rv = parse_arg(buf, count, &value);
414 if (rv < 0)
415 return rv;
416
417 switch (value) {
418 case 0:
419 if (eeepc->cpufv_disabled)
420 pr_warn("cpufv enabled (not officially supported "
421 "on this model)\n");
422 eeepc->cpufv_disabled = false;
423 return rv;
424 case 1:
425 return -EPERM;
426 default:
427 return -EINVAL;
428 }
429 }
430
431
432 static struct device_attribute dev_attr_cpufv = {
433 .attr = {
434 .name = "cpufv",
435 .mode = 0644 },
436 .show = show_cpufv,
437 .store = store_cpufv
438 };
439
440 static struct device_attribute dev_attr_available_cpufv = {
441 .attr = {
442 .name = "available_cpufv",
443 .mode = 0444 },
444 .show = show_available_cpufv
445 };
446
447 static struct device_attribute dev_attr_cpufv_disabled = {
448 .attr = {
449 .name = "cpufv_disabled",
450 .mode = 0644 },
451 .show = show_cpufv_disabled,
452 .store = store_cpufv_disabled
453 };
454
455
456 static struct attribute *platform_attributes[] = {
457 &dev_attr_camera.attr,
458 &dev_attr_cardr.attr,
459 &dev_attr_disp.attr,
460 &dev_attr_cpufv.attr,
461 &dev_attr_available_cpufv.attr,
462 &dev_attr_cpufv_disabled.attr,
463 NULL
464 };
465
466 static struct attribute_group platform_attribute_group = {
467 .attrs = platform_attributes
468 };
469
470 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
471 {
472 int result;
473
474 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
475 if (!eeepc->platform_device)
476 return -ENOMEM;
477 platform_set_drvdata(eeepc->platform_device, eeepc);
478
479 result = platform_device_add(eeepc->platform_device);
480 if (result)
481 goto fail_platform_device;
482
483 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
484 &platform_attribute_group);
485 if (result)
486 goto fail_sysfs;
487 return 0;
488
489 fail_sysfs:
490 platform_device_del(eeepc->platform_device);
491 fail_platform_device:
492 platform_device_put(eeepc->platform_device);
493 return result;
494 }
495
496 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
497 {
498 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
499 &platform_attribute_group);
500 platform_device_unregister(eeepc->platform_device);
501 }
502
503 /*
504 * LEDs
505 */
506 /*
507 * These functions actually update the LED's, and are called from a
508 * workqueue. By doing this as separate work rather than when the LED
509 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
510 * potentially bad time, such as a timer interrupt.
511 */
512 static void tpd_led_update(struct work_struct *work)
513 {
514 struct eeepc_laptop *eeepc;
515
516 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
517
518 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
519 }
520
521 static void tpd_led_set(struct led_classdev *led_cdev,
522 enum led_brightness value)
523 {
524 struct eeepc_laptop *eeepc;
525
526 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
527
528 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
529 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
530 }
531
532 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
533 {
534 struct eeepc_laptop *eeepc;
535
536 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
537
538 return get_acpi(eeepc, CM_ASL_TPD);
539 }
540
541 static int eeepc_led_init(struct eeepc_laptop *eeepc)
542 {
543 int rv;
544
545 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
546 return 0;
547
548 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
549 if (!eeepc->led_workqueue)
550 return -ENOMEM;
551 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
552
553 eeepc->tpd_led.name = "eeepc::touchpad";
554 eeepc->tpd_led.brightness_set = tpd_led_set;
555 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
556 eeepc->tpd_led.brightness_get = tpd_led_get;
557 eeepc->tpd_led.max_brightness = 1;
558
559 rv = led_classdev_register(&eeepc->platform_device->dev,
560 &eeepc->tpd_led);
561 if (rv) {
562 destroy_workqueue(eeepc->led_workqueue);
563 return rv;
564 }
565
566 return 0;
567 }
568
569 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
570 {
571 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
572 led_classdev_unregister(&eeepc->tpd_led);
573 if (eeepc->led_workqueue)
574 destroy_workqueue(eeepc->led_workqueue);
575 }
576
577
578 /*
579 * PCI hotplug (for wlan rfkill)
580 */
581 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
582 {
583 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
584 return false;
585 return true;
586 }
587
588 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
589 {
590 struct pci_dev *port;
591 struct pci_dev *dev;
592 struct pci_bus *bus;
593 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
594 bool absent;
595 u32 l;
596
597 if (eeepc->wlan_rfkill)
598 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
599
600 mutex_lock(&eeepc->hotplug_lock);
601
602 if (eeepc->hotplug_slot) {
603 port = acpi_get_pci_dev(handle);
604 if (!port) {
605 pr_warning("Unable to find port\n");
606 goto out_unlock;
607 }
608
609 bus = port->subordinate;
610
611 if (!bus) {
612 pr_warn("Unable to find PCI bus 1?\n");
613 goto out_put_dev;
614 }
615
616 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
617 pr_err("Unable to read PCI config space?\n");
618 goto out_put_dev;
619 }
620
621 absent = (l == 0xffffffff);
622
623 if (blocked != absent) {
624 pr_warn("BIOS says wireless lan is %s, "
625 "but the pci device is %s\n",
626 blocked ? "blocked" : "unblocked",
627 absent ? "absent" : "present");
628 pr_warn("skipped wireless hotplug as probably "
629 "inappropriate for this model\n");
630 goto out_put_dev;
631 }
632
633 if (!blocked) {
634 dev = pci_get_slot(bus, 0);
635 if (dev) {
636 /* Device already present */
637 pci_dev_put(dev);
638 goto out_put_dev;
639 }
640 dev = pci_scan_single_device(bus, 0);
641 if (dev) {
642 pci_bus_assign_resources(bus);
643 if (pci_bus_add_device(dev))
644 pr_err("Unable to hotplug wifi\n");
645 }
646 } else {
647 dev = pci_get_slot(bus, 0);
648 if (dev) {
649 pci_stop_and_remove_bus_device(dev);
650 pci_dev_put(dev);
651 }
652 }
653 out_put_dev:
654 pci_dev_put(port);
655 }
656
657 out_unlock:
658 mutex_unlock(&eeepc->hotplug_lock);
659 }
660
661 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
662 {
663 acpi_status status = AE_OK;
664 acpi_handle handle;
665
666 status = acpi_get_handle(NULL, node, &handle);
667
668 if (ACPI_SUCCESS(status))
669 eeepc_rfkill_hotplug(eeepc, handle);
670 }
671
672 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
673 {
674 struct eeepc_laptop *eeepc = data;
675
676 if (event != ACPI_NOTIFY_BUS_CHECK)
677 return;
678
679 eeepc_rfkill_hotplug(eeepc, handle);
680 }
681
682 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
683 char *node)
684 {
685 acpi_status status;
686 acpi_handle handle;
687
688 status = acpi_get_handle(NULL, node, &handle);
689
690 if (ACPI_SUCCESS(status)) {
691 status = acpi_install_notify_handler(handle,
692 ACPI_SYSTEM_NOTIFY,
693 eeepc_rfkill_notify,
694 eeepc);
695 if (ACPI_FAILURE(status))
696 pr_warn("Failed to register notify on %s\n", node);
697
698 /*
699 * Refresh pci hotplug in case the rfkill state was
700 * changed during setup.
701 */
702 eeepc_rfkill_hotplug(eeepc, handle);
703 } else
704 return -ENODEV;
705
706 return 0;
707 }
708
709 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
710 char *node)
711 {
712 acpi_status status = AE_OK;
713 acpi_handle handle;
714
715 status = acpi_get_handle(NULL, node, &handle);
716
717 if (ACPI_SUCCESS(status)) {
718 status = acpi_remove_notify_handler(handle,
719 ACPI_SYSTEM_NOTIFY,
720 eeepc_rfkill_notify);
721 if (ACPI_FAILURE(status))
722 pr_err("Error removing rfkill notify handler %s\n",
723 node);
724 /*
725 * Refresh pci hotplug in case the rfkill
726 * state was changed after
727 * eeepc_unregister_rfkill_notifier()
728 */
729 eeepc_rfkill_hotplug(eeepc, handle);
730 }
731 }
732
733 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
734 u8 *value)
735 {
736 struct eeepc_laptop *eeepc = hotplug_slot->private;
737 int val = get_acpi(eeepc, CM_ASL_WLAN);
738
739 if (val == 1 || val == 0)
740 *value = val;
741 else
742 return -EINVAL;
743
744 return 0;
745 }
746
747 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
748 {
749 kfree(hotplug_slot->info);
750 kfree(hotplug_slot);
751 }
752
753 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
754 .owner = THIS_MODULE,
755 .get_adapter_status = eeepc_get_adapter_status,
756 .get_power_status = eeepc_get_adapter_status,
757 };
758
759 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
760 {
761 int ret = -ENOMEM;
762 struct pci_bus *bus = pci_find_bus(0, 1);
763
764 if (!bus) {
765 pr_err("Unable to find wifi PCI bus\n");
766 return -ENODEV;
767 }
768
769 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
770 if (!eeepc->hotplug_slot)
771 goto error_slot;
772
773 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
774 GFP_KERNEL);
775 if (!eeepc->hotplug_slot->info)
776 goto error_info;
777
778 eeepc->hotplug_slot->private = eeepc;
779 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
780 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
781 eeepc_get_adapter_status(eeepc->hotplug_slot,
782 &eeepc->hotplug_slot->info->adapter_status);
783
784 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
785 if (ret) {
786 pr_err("Unable to register hotplug slot - %d\n", ret);
787 goto error_register;
788 }
789
790 return 0;
791
792 error_register:
793 kfree(eeepc->hotplug_slot->info);
794 error_info:
795 kfree(eeepc->hotplug_slot);
796 eeepc->hotplug_slot = NULL;
797 error_slot:
798 return ret;
799 }
800
801 /*
802 * Rfkill devices
803 */
804 static int eeepc_rfkill_set(void *data, bool blocked)
805 {
806 acpi_handle handle = data;
807
808 return write_acpi_int(handle, NULL, !blocked);
809 }
810
811 static const struct rfkill_ops eeepc_rfkill_ops = {
812 .set_block = eeepc_rfkill_set,
813 };
814
815 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
816 struct rfkill **rfkill,
817 const char *name,
818 enum rfkill_type type, int cm)
819 {
820 acpi_handle handle;
821 int result;
822
823 result = acpi_setter_handle(eeepc, cm, &handle);
824 if (result < 0)
825 return result;
826
827 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
828 &eeepc_rfkill_ops, handle);
829
830 if (!*rfkill)
831 return -EINVAL;
832
833 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
834 result = rfkill_register(*rfkill);
835 if (result) {
836 rfkill_destroy(*rfkill);
837 *rfkill = NULL;
838 return result;
839 }
840 return 0;
841 }
842
843 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
844 {
845 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
846 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
847 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
848 if (eeepc->wlan_rfkill) {
849 rfkill_unregister(eeepc->wlan_rfkill);
850 rfkill_destroy(eeepc->wlan_rfkill);
851 eeepc->wlan_rfkill = NULL;
852 }
853
854 if (eeepc->hotplug_slot)
855 pci_hp_deregister(eeepc->hotplug_slot);
856
857 if (eeepc->bluetooth_rfkill) {
858 rfkill_unregister(eeepc->bluetooth_rfkill);
859 rfkill_destroy(eeepc->bluetooth_rfkill);
860 eeepc->bluetooth_rfkill = NULL;
861 }
862 if (eeepc->wwan3g_rfkill) {
863 rfkill_unregister(eeepc->wwan3g_rfkill);
864 rfkill_destroy(eeepc->wwan3g_rfkill);
865 eeepc->wwan3g_rfkill = NULL;
866 }
867 if (eeepc->wimax_rfkill) {
868 rfkill_unregister(eeepc->wimax_rfkill);
869 rfkill_destroy(eeepc->wimax_rfkill);
870 eeepc->wimax_rfkill = NULL;
871 }
872 }
873
874 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
875 {
876 int result = 0;
877
878 mutex_init(&eeepc->hotplug_lock);
879
880 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
881 "eeepc-wlan", RFKILL_TYPE_WLAN,
882 CM_ASL_WLAN);
883
884 if (result && result != -ENODEV)
885 goto exit;
886
887 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
888 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
889 CM_ASL_BLUETOOTH);
890
891 if (result && result != -ENODEV)
892 goto exit;
893
894 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
895 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
896 CM_ASL_3G);
897
898 if (result && result != -ENODEV)
899 goto exit;
900
901 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
902 "eeepc-wimax", RFKILL_TYPE_WIMAX,
903 CM_ASL_WIMAX);
904
905 if (result && result != -ENODEV)
906 goto exit;
907
908 if (eeepc->hotplug_disabled)
909 return 0;
910
911 result = eeepc_setup_pci_hotplug(eeepc);
912 /*
913 * If we get -EBUSY then something else is handling the PCI hotplug -
914 * don't fail in this case
915 */
916 if (result == -EBUSY)
917 result = 0;
918
919 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
920 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
921 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
922
923 exit:
924 if (result && result != -ENODEV)
925 eeepc_rfkill_exit(eeepc);
926 return result;
927 }
928
929 /*
930 * Platform driver - hibernate/resume callbacks
931 */
932 static int eeepc_hotk_thaw(struct device *device)
933 {
934 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
935
936 if (eeepc->wlan_rfkill) {
937 bool wlan;
938
939 /*
940 * Work around bios bug - acpi _PTS turns off the wireless led
941 * during suspend. Normally it restores it on resume, but
942 * we should kick it ourselves in case hibernation is aborted.
943 */
944 wlan = get_acpi(eeepc, CM_ASL_WLAN);
945 set_acpi(eeepc, CM_ASL_WLAN, wlan);
946 }
947
948 return 0;
949 }
950
951 static int eeepc_hotk_restore(struct device *device)
952 {
953 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
954
955 /* Refresh both wlan rfkill state and pci hotplug */
956 if (eeepc->wlan_rfkill) {
957 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5");
958 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6");
959 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7");
960 }
961
962 if (eeepc->bluetooth_rfkill)
963 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
964 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
965 if (eeepc->wwan3g_rfkill)
966 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
967 get_acpi(eeepc, CM_ASL_3G) != 1);
968 if (eeepc->wimax_rfkill)
969 rfkill_set_sw_state(eeepc->wimax_rfkill,
970 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
971
972 return 0;
973 }
974
975 static const struct dev_pm_ops eeepc_pm_ops = {
976 .thaw = eeepc_hotk_thaw,
977 .restore = eeepc_hotk_restore,
978 };
979
980 static struct platform_driver platform_driver = {
981 .driver = {
982 .name = EEEPC_LAPTOP_FILE,
983 .owner = THIS_MODULE,
984 .pm = &eeepc_pm_ops,
985 }
986 };
987
988 /*
989 * Hwmon device
990 */
991
992 #define EEEPC_EC_SC00 0x61
993 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
994 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
995 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
996
997 #define EEEPC_EC_SFB0 0xD0
998 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
999
1000 static int eeepc_get_fan_pwm(void)
1001 {
1002 u8 value = 0;
1003
1004 ec_read(EEEPC_EC_FAN_PWM, &value);
1005 return value * 255 / 100;
1006 }
1007
1008 static void eeepc_set_fan_pwm(int value)
1009 {
1010 value = SENSORS_LIMIT(value, 0, 255);
1011 value = value * 100 / 255;
1012 ec_write(EEEPC_EC_FAN_PWM, value);
1013 }
1014
1015 static int eeepc_get_fan_rpm(void)
1016 {
1017 u8 high = 0;
1018 u8 low = 0;
1019
1020 ec_read(EEEPC_EC_FAN_HRPM, &high);
1021 ec_read(EEEPC_EC_FAN_LRPM, &low);
1022 return high << 8 | low;
1023 }
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 & 0x02)
1031 return 1; /* manual */
1032 else
1033 return 2; /* automatic */
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 == 1)
1042 value |= 0x02;
1043 else
1044 value &= ~0x02;
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, count, &value);
1053 if (rv > 0)
1054 set(value);
1055 return rv;
1056 }
1057
1058 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1059 {
1060 return sprintf(buf, "%d\n", get());
1061 }
1062
1063 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
1064 static ssize_t show_##_name(struct device *dev, \
1065 struct device_attribute *attr, \
1066 char *buf) \
1067 { \
1068 return show_sys_hwmon(_set, buf); \
1069 } \
1070 static ssize_t store_##_name(struct device *dev, \
1071 struct device_attribute *attr, \
1072 const char *buf, size_t count) \
1073 { \
1074 return store_sys_hwmon(_get, buf, count); \
1075 } \
1076 static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
1077
1078 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
1079 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
1080 eeepc_get_fan_pwm, eeepc_set_fan_pwm);
1081 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1082 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
1083
1084 static ssize_t
1085 show_name(struct device *dev, struct device_attribute *attr, char *buf)
1086 {
1087 return sprintf(buf, "eeepc\n");
1088 }
1089 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
1090
1091 static struct attribute *hwmon_attributes[] = {
1092 &sensor_dev_attr_pwm1.dev_attr.attr,
1093 &sensor_dev_attr_fan1_input.dev_attr.attr,
1094 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1095 &sensor_dev_attr_name.dev_attr.attr,
1096 NULL
1097 };
1098
1099 static struct attribute_group hwmon_attribute_group = {
1100 .attrs = hwmon_attributes
1101 };
1102
1103 static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc)
1104 {
1105 struct device *hwmon;
1106
1107 hwmon = eeepc->hwmon_device;
1108 if (!hwmon)
1109 return;
1110 sysfs_remove_group(&hwmon->kobj,
1111 &hwmon_attribute_group);
1112 hwmon_device_unregister(hwmon);
1113 eeepc->hwmon_device = NULL;
1114 }
1115
1116 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1117 {
1118 struct device *hwmon;
1119 int result;
1120
1121 hwmon = hwmon_device_register(&eeepc->platform_device->dev);
1122 if (IS_ERR(hwmon)) {
1123 pr_err("Could not register eeepc hwmon device\n");
1124 eeepc->hwmon_device = NULL;
1125 return PTR_ERR(hwmon);
1126 }
1127 eeepc->hwmon_device = hwmon;
1128 result = sysfs_create_group(&hwmon->kobj,
1129 &hwmon_attribute_group);
1130 if (result)
1131 eeepc_hwmon_exit(eeepc);
1132 return result;
1133 }
1134
1135 /*
1136 * Backlight device
1137 */
1138 static int read_brightness(struct backlight_device *bd)
1139 {
1140 struct eeepc_laptop *eeepc = bl_get_data(bd);
1141
1142 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1143 }
1144
1145 static int set_brightness(struct backlight_device *bd, int value)
1146 {
1147 struct eeepc_laptop *eeepc = bl_get_data(bd);
1148
1149 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1150 }
1151
1152 static int update_bl_status(struct backlight_device *bd)
1153 {
1154 return set_brightness(bd, bd->props.brightness);
1155 }
1156
1157 static const struct backlight_ops eeepcbl_ops = {
1158 .get_brightness = read_brightness,
1159 .update_status = update_bl_status,
1160 };
1161
1162 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1163 {
1164 struct backlight_device *bd = eeepc->backlight_device;
1165 int old = bd->props.brightness;
1166
1167 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1168
1169 return old;
1170 }
1171
1172 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1173 {
1174 struct backlight_properties props;
1175 struct backlight_device *bd;
1176
1177 memset(&props, 0, sizeof(struct backlight_properties));
1178 props.type = BACKLIGHT_PLATFORM;
1179 props.max_brightness = 15;
1180 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1181 &eeepc->platform_device->dev, eeepc,
1182 &eeepcbl_ops, &props);
1183 if (IS_ERR(bd)) {
1184 pr_err("Could not register eeepc backlight device\n");
1185 eeepc->backlight_device = NULL;
1186 return PTR_ERR(bd);
1187 }
1188 eeepc->backlight_device = bd;
1189 bd->props.brightness = read_brightness(bd);
1190 bd->props.power = FB_BLANK_UNBLANK;
1191 backlight_update_status(bd);
1192 return 0;
1193 }
1194
1195 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1196 {
1197 if (eeepc->backlight_device)
1198 backlight_device_unregister(eeepc->backlight_device);
1199 eeepc->backlight_device = NULL;
1200 }
1201
1202
1203 /*
1204 * Input device (i.e. hotkeys)
1205 */
1206 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1207 {
1208 struct input_dev *input;
1209 int error;
1210
1211 input = input_allocate_device();
1212 if (!input) {
1213 pr_info("Unable to allocate input device\n");
1214 return -ENOMEM;
1215 }
1216
1217 input->name = "Asus EeePC extra buttons";
1218 input->phys = EEEPC_LAPTOP_FILE "/input0";
1219 input->id.bustype = BUS_HOST;
1220 input->dev.parent = &eeepc->platform_device->dev;
1221
1222 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1223 if (error) {
1224 pr_err("Unable to setup input device keymap\n");
1225 goto err_free_dev;
1226 }
1227
1228 error = input_register_device(input);
1229 if (error) {
1230 pr_err("Unable to register input device\n");
1231 goto err_free_keymap;
1232 }
1233
1234 eeepc->inputdev = input;
1235 return 0;
1236
1237 err_free_keymap:
1238 sparse_keymap_free(input);
1239 err_free_dev:
1240 input_free_device(input);
1241 return error;
1242 }
1243
1244 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1245 {
1246 if (eeepc->inputdev) {
1247 sparse_keymap_free(eeepc->inputdev);
1248 input_unregister_device(eeepc->inputdev);
1249 }
1250 eeepc->inputdev = NULL;
1251 }
1252
1253 /*
1254 * ACPI driver
1255 */
1256 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1257 {
1258 if (!eeepc->inputdev)
1259 return ;
1260 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1261 pr_info("Unknown key %x pressed\n", event);
1262 }
1263
1264 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1265 {
1266 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1267 u16 count;
1268
1269 if (event > ACPI_MAX_SYS_NOTIFY)
1270 return;
1271 count = eeepc->event_count[event % 128]++;
1272 acpi_bus_generate_proc_event(device, event, count);
1273 acpi_bus_generate_netlink_event(device->pnp.device_class,
1274 dev_name(&device->dev), event,
1275 count);
1276
1277 /* Brightness events are special */
1278 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
1279
1280 /* Ignore them completely if the acpi video driver is used */
1281 if (eeepc->backlight_device != NULL) {
1282 int old_brightness, new_brightness;
1283
1284 /* Update the backlight device. */
1285 old_brightness = eeepc_backlight_notify(eeepc);
1286
1287 /* Convert event to keypress (obsolescent hack) */
1288 new_brightness = event - NOTIFY_BRN_MIN;
1289
1290 if (new_brightness < old_brightness) {
1291 event = NOTIFY_BRN_MIN; /* brightness down */
1292 } else if (new_brightness > old_brightness) {
1293 event = NOTIFY_BRN_MAX; /* brightness up */
1294 } else {
1295 /*
1296 * no change in brightness - already at min/max,
1297 * event will be desired value (or else ignored)
1298 */
1299 }
1300 eeepc_input_notify(eeepc, event);
1301 }
1302 } else {
1303 /* Everything else is a bona-fide keypress event */
1304 eeepc_input_notify(eeepc, event);
1305 }
1306 }
1307
1308 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1309 {
1310 const char *model;
1311
1312 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1313 if (!model)
1314 return;
1315
1316 /*
1317 * Blacklist for setting cpufv (cpu speed).
1318 *
1319 * EeePC 4G ("701") implements CFVS, but it is not supported
1320 * by the pre-installed OS, and the original option to change it
1321 * in the BIOS setup screen was removed in later versions.
1322 *
1323 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1324 * this applies to all "701" models (4G/4G Surf/2G Surf).
1325 *
1326 * So Asus made a deliberate decision not to support it on this model.
1327 * We have several reports that using it can cause the system to hang
1328 *
1329 * The hang has also been reported on a "702" (Model name "8G"?).
1330 *
1331 * We avoid dmi_check_system() / dmi_match(), because they use
1332 * substring matching. We don't want to affect the "701SD"
1333 * and "701SDX" models, because they do support S.H.E.
1334 */
1335 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1336 eeepc->cpufv_disabled = true;
1337 pr_info("model %s does not officially support setting cpu "
1338 "speed\n", model);
1339 pr_info("cpufv disabled to avoid instability\n");
1340 }
1341
1342 /*
1343 * Blacklist for wlan hotplug
1344 *
1345 * Eeepc 1005HA doesn't work like others models and don't need the
1346 * hotplug code. In fact, current hotplug code seems to unplug another
1347 * device...
1348 */
1349 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1350 strcmp(model, "1005PE") == 0) {
1351 eeepc->hotplug_disabled = true;
1352 pr_info("wlan hotplug disabled\n");
1353 }
1354 }
1355
1356 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1357 {
1358 int dummy;
1359
1360 /* Some BIOSes do not report cm although it is available.
1361 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1362 if (!(eeepc->cm_supported & (1 << cm))
1363 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1364 pr_info("%s (%x) not reported by BIOS,"
1365 " enabling anyway\n", name, 1 << cm);
1366 eeepc->cm_supported |= 1 << cm;
1367 }
1368 }
1369
1370 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1371 {
1372 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1373 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1374 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1375 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1376 }
1377
1378 static int __devinit eeepc_acpi_init(struct eeepc_laptop *eeepc)
1379 {
1380 unsigned int init_flags;
1381 int result;
1382
1383 result = acpi_bus_get_status(eeepc->device);
1384 if (result)
1385 return result;
1386 if (!eeepc->device->status.present) {
1387 pr_err("Hotkey device not present, aborting\n");
1388 return -ENODEV;
1389 }
1390
1391 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1392 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1393
1394 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1395 pr_err("Hotkey initialization failed\n");
1396 return -ENODEV;
1397 }
1398
1399 /* get control methods supported */
1400 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1401 pr_err("Get control methods supported failed\n");
1402 return -ENODEV;
1403 }
1404 cmsg_quirks(eeepc);
1405 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1406
1407 return 0;
1408 }
1409
1410 static void __devinit eeepc_enable_camera(struct eeepc_laptop *eeepc)
1411 {
1412 /*
1413 * If the following call to set_acpi() fails, it's because there's no
1414 * camera so we can ignore the error.
1415 */
1416 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1417 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1418 }
1419
1420 static bool eeepc_device_present;
1421
1422 static int __devinit eeepc_acpi_add(struct acpi_device *device)
1423 {
1424 struct eeepc_laptop *eeepc;
1425 int result;
1426
1427 pr_notice(EEEPC_LAPTOP_NAME "\n");
1428 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1429 if (!eeepc)
1430 return -ENOMEM;
1431 eeepc->handle = device->handle;
1432 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1433 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1434 device->driver_data = eeepc;
1435 eeepc->device = device;
1436
1437 eeepc->hotplug_disabled = hotplug_disabled;
1438
1439 eeepc_dmi_check(eeepc);
1440
1441 result = eeepc_acpi_init(eeepc);
1442 if (result)
1443 goto fail_platform;
1444 eeepc_enable_camera(eeepc);
1445
1446 /*
1447 * Register the platform device first. It is used as a parent for the
1448 * sub-devices below.
1449 *
1450 * Note that if there are multiple instances of this ACPI device it
1451 * will bail out, because the platform device is registered with a
1452 * fixed name. Of course it doesn't make sense to have more than one,
1453 * and machine-specific scripts find the fixed name convenient. But
1454 * It's also good for us to exclude multiple instances because both
1455 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1456 * (the EC and the wlan PCI slot respectively).
1457 */
1458 result = eeepc_platform_init(eeepc);
1459 if (result)
1460 goto fail_platform;
1461
1462 if (!acpi_video_backlight_support()) {
1463 result = eeepc_backlight_init(eeepc);
1464 if (result)
1465 goto fail_backlight;
1466 } else
1467 pr_info("Backlight controlled by ACPI video driver\n");
1468
1469 result = eeepc_input_init(eeepc);
1470 if (result)
1471 goto fail_input;
1472
1473 result = eeepc_hwmon_init(eeepc);
1474 if (result)
1475 goto fail_hwmon;
1476
1477 result = eeepc_led_init(eeepc);
1478 if (result)
1479 goto fail_led;
1480
1481 result = eeepc_rfkill_init(eeepc);
1482 if (result)
1483 goto fail_rfkill;
1484
1485 eeepc_device_present = true;
1486 return 0;
1487
1488 fail_rfkill:
1489 eeepc_led_exit(eeepc);
1490 fail_led:
1491 eeepc_hwmon_exit(eeepc);
1492 fail_hwmon:
1493 eeepc_input_exit(eeepc);
1494 fail_input:
1495 eeepc_backlight_exit(eeepc);
1496 fail_backlight:
1497 eeepc_platform_exit(eeepc);
1498 fail_platform:
1499 kfree(eeepc);
1500
1501 return result;
1502 }
1503
1504 static int eeepc_acpi_remove(struct acpi_device *device, int type)
1505 {
1506 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1507
1508 eeepc_backlight_exit(eeepc);
1509 eeepc_rfkill_exit(eeepc);
1510 eeepc_input_exit(eeepc);
1511 eeepc_hwmon_exit(eeepc);
1512 eeepc_led_exit(eeepc);
1513 eeepc_platform_exit(eeepc);
1514
1515 kfree(eeepc);
1516 return 0;
1517 }
1518
1519
1520 static const struct acpi_device_id eeepc_device_ids[] = {
1521 {EEEPC_ACPI_HID, 0},
1522 {"", 0},
1523 };
1524 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1525
1526 static struct acpi_driver eeepc_acpi_driver = {
1527 .name = EEEPC_LAPTOP_NAME,
1528 .class = EEEPC_ACPI_CLASS,
1529 .owner = THIS_MODULE,
1530 .ids = eeepc_device_ids,
1531 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1532 .ops = {
1533 .add = eeepc_acpi_add,
1534 .remove = eeepc_acpi_remove,
1535 .notify = eeepc_acpi_notify,
1536 },
1537 };
1538
1539
1540 static int __init eeepc_laptop_init(void)
1541 {
1542 int result;
1543
1544 result = platform_driver_register(&platform_driver);
1545 if (result < 0)
1546 return result;
1547
1548 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1549 if (result < 0)
1550 goto fail_acpi_driver;
1551
1552 if (!eeepc_device_present) {
1553 result = -ENODEV;
1554 goto fail_no_device;
1555 }
1556
1557 return 0;
1558
1559 fail_no_device:
1560 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1561 fail_acpi_driver:
1562 platform_driver_unregister(&platform_driver);
1563 return result;
1564 }
1565
1566 static void __exit eeepc_laptop_exit(void)
1567 {
1568 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1569 platform_driver_unregister(&platform_driver);
1570 }
1571
1572 module_init(eeepc_laptop_init);
1573 module_exit(eeepc_laptop_exit);
Linux kernel - Deliverables
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