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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
50MODULE_AUTHOR("Corentin Chary, Eric Cooper");
51MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
52MODULE_LICENSE("GPL");
53
54static bool hotplug_disabled;
55
56module_param(hotplug_disabled, bool, 0444);
57MODULE_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
68enum {
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
83enum {
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
114static 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
124static 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
134static 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 */
159struct 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 */
191static 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, ¶ms, NULL);
203 return (status == AE_OK ? 0 : -1);
204}
205
206static 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
221static 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
235static 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
250static 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 */
274static 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
283static 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
297static 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
328EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
329EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
330EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
331
332struct eeepc_cpufv {
333 int num;
334 int cur;
335};
336
337static 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
347static 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
364static 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
376static 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
397static 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
406static 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
432static struct device_attribute dev_attr_cpufv = {
433 .attr = {
434 .name = "cpufv",
435 .mode = 0644 },
436 .show = show_cpufv,
437 .store = store_cpufv
438};
439
440static struct device_attribute dev_attr_available_cpufv = {
441 .attr = {
442 .name = "available_cpufv",
443 .mode = 0444 },
444 .show = show_available_cpufv
445};
446
447static 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
456static 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
466static struct attribute_group platform_attribute_group = {
467 .attrs = platform_attributes
468};
469
470static 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
489fail_sysfs:
490 platform_device_del(eeepc->platform_device);
491fail_platform_device:
492 platform_device_put(eeepc->platform_device);
493 return result;
494}
495
496static 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 */
512static 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
521static 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
532static 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
541static 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
569static void eeepc_led_exit(struct eeepc_laptop *eeepc)
570{
571 if (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 */
581static 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
588static 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_unlock;
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_unlock;
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_unlock;
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_unlock;
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_remove_bus_device(dev);
650 pci_dev_put(dev);
651 }
652 }
653 }
654
655out_unlock:
656 mutex_unlock(&eeepc->hotplug_lock);
657}
658
659static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
660{
661 acpi_status status = AE_OK;
662 acpi_handle handle;
663
664 status = acpi_get_handle(NULL, node, &handle);
665
666 if (ACPI_SUCCESS(status))
667 eeepc_rfkill_hotplug(eeepc, handle);
668}
669
670static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
671{
672 struct eeepc_laptop *eeepc = data;
673
674 if (event != ACPI_NOTIFY_BUS_CHECK)
675 return;
676
677 eeepc_rfkill_hotplug(eeepc, handle);
678}
679
680static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
681 char *node)
682{
683 acpi_status status;
684 acpi_handle handle;
685
686 status = acpi_get_handle(NULL, node, &handle);
687
688 if (ACPI_SUCCESS(status)) {
689 status = acpi_install_notify_handler(handle,
690 ACPI_SYSTEM_NOTIFY,
691 eeepc_rfkill_notify,
692 eeepc);
693 if (ACPI_FAILURE(status))
694 pr_warn("Failed to register notify on %s\n", node);
695
696 /*
697 * Refresh pci hotplug in case the rfkill state was
698 * changed during setup.
699 */
700 eeepc_rfkill_hotplug(eeepc, handle);
701 } else
702 return -ENODEV;
703
704 return 0;
705}
706
707static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
708 char *node)
709{
710 acpi_status status = AE_OK;
711 acpi_handle handle;
712
713 status = acpi_get_handle(NULL, node, &handle);
714
715 if (ACPI_SUCCESS(status)) {
716 status = acpi_remove_notify_handler(handle,
717 ACPI_SYSTEM_NOTIFY,
718 eeepc_rfkill_notify);
719 if (ACPI_FAILURE(status))
720 pr_err("Error removing rfkill notify handler %s\n",
721 node);
722 /*
723 * Refresh pci hotplug in case the rfkill
724 * state was changed after
725 * eeepc_unregister_rfkill_notifier()
726 */
727 eeepc_rfkill_hotplug(eeepc, handle);
728 }
729}
730
731static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
732 u8 *value)
733{
734 struct eeepc_laptop *eeepc = hotplug_slot->private;
735 int val = get_acpi(eeepc, CM_ASL_WLAN);
736
737 if (val == 1 || val == 0)
738 *value = val;
739 else
740 return -EINVAL;
741
742 return 0;
743}
744
745static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
746{
747 kfree(hotplug_slot->info);
748 kfree(hotplug_slot);
749}
750
751static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
752 .owner = THIS_MODULE,
753 .get_adapter_status = eeepc_get_adapter_status,
754 .get_power_status = eeepc_get_adapter_status,
755};
756
757static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
758{
759 int ret = -ENOMEM;
760 struct pci_bus *bus = pci_find_bus(0, 1);
761
762 if (!bus) {
763 pr_err("Unable to find wifi PCI bus\n");
764 return -ENODEV;
765 }
766
767 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
768 if (!eeepc->hotplug_slot)
769 goto error_slot;
770
771 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
772 GFP_KERNEL);
773 if (!eeepc->hotplug_slot->info)
774 goto error_info;
775
776 eeepc->hotplug_slot->private = eeepc;
777 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
778 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
779 eeepc_get_adapter_status(eeepc->hotplug_slot,
780 &eeepc->hotplug_slot->info->adapter_status);
781
782 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
783 if (ret) {
784 pr_err("Unable to register hotplug slot - %d\n", ret);
785 goto error_register;
786 }
787
788 return 0;
789
790error_register:
791 kfree(eeepc->hotplug_slot->info);
792error_info:
793 kfree(eeepc->hotplug_slot);
794 eeepc->hotplug_slot = NULL;
795error_slot:
796 return ret;
797}
798
799/*
800 * Rfkill devices
801 */
802static int eeepc_rfkill_set(void *data, bool blocked)
803{
804 acpi_handle handle = data;
805
806 return write_acpi_int(handle, NULL, !blocked);
807}
808
809static const struct rfkill_ops eeepc_rfkill_ops = {
810 .set_block = eeepc_rfkill_set,
811};
812
813static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
814 struct rfkill **rfkill,
815 const char *name,
816 enum rfkill_type type, int cm)
817{
818 acpi_handle handle;
819 int result;
820
821 result = acpi_setter_handle(eeepc, cm, &handle);
822 if (result < 0)
823 return result;
824
825 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
826 &eeepc_rfkill_ops, handle);
827
828 if (!*rfkill)
829 return -EINVAL;
830
831 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
832 result = rfkill_register(*rfkill);
833 if (result) {
834 rfkill_destroy(*rfkill);
835 *rfkill = NULL;
836 return result;
837 }
838 return 0;
839}
840
841static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
842{
843 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
844 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
845 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
846 if (eeepc->wlan_rfkill) {
847 rfkill_unregister(eeepc->wlan_rfkill);
848 rfkill_destroy(eeepc->wlan_rfkill);
849 eeepc->wlan_rfkill = NULL;
850 }
851
852 if (eeepc->hotplug_slot)
853 pci_hp_deregister(eeepc->hotplug_slot);
854
855 if (eeepc->bluetooth_rfkill) {
856 rfkill_unregister(eeepc->bluetooth_rfkill);
857 rfkill_destroy(eeepc->bluetooth_rfkill);
858 eeepc->bluetooth_rfkill = NULL;
859 }
860 if (eeepc->wwan3g_rfkill) {
861 rfkill_unregister(eeepc->wwan3g_rfkill);
862 rfkill_destroy(eeepc->wwan3g_rfkill);
863 eeepc->wwan3g_rfkill = NULL;
864 }
865 if (eeepc->wimax_rfkill) {
866 rfkill_unregister(eeepc->wimax_rfkill);
867 rfkill_destroy(eeepc->wimax_rfkill);
868 eeepc->wimax_rfkill = NULL;
869 }
870}
871
872static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
873{
874 int result = 0;
875
876 mutex_init(&eeepc->hotplug_lock);
877
878 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
879 "eeepc-wlan", RFKILL_TYPE_WLAN,
880 CM_ASL_WLAN);
881
882 if (result && result != -ENODEV)
883 goto exit;
884
885 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
886 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
887 CM_ASL_BLUETOOTH);
888
889 if (result && result != -ENODEV)
890 goto exit;
891
892 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
893 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
894 CM_ASL_3G);
895
896 if (result && result != -ENODEV)
897 goto exit;
898
899 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
900 "eeepc-wimax", RFKILL_TYPE_WIMAX,
901 CM_ASL_WIMAX);
902
903 if (result && result != -ENODEV)
904 goto exit;
905
906 if (eeepc->hotplug_disabled)
907 return 0;
908
909 result = eeepc_setup_pci_hotplug(eeepc);
910 /*
911 * If we get -EBUSY then something else is handling the PCI hotplug -
912 * don't fail in this case
913 */
914 if (result == -EBUSY)
915 result = 0;
916
917 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
918 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
919 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
920
921exit:
922 if (result && result != -ENODEV)
923 eeepc_rfkill_exit(eeepc);
924 return result;
925}
926
927/*
928 * Platform driver - hibernate/resume callbacks
929 */
930static int eeepc_hotk_thaw(struct device *device)
931{
932 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
933
934 if (eeepc->wlan_rfkill) {
935 bool wlan;
936
937 /*
938 * Work around bios bug - acpi _PTS turns off the wireless led
939 * during suspend. Normally it restores it on resume, but
940 * we should kick it ourselves in case hibernation is aborted.
941 */
942 wlan = get_acpi(eeepc, CM_ASL_WLAN);
943 set_acpi(eeepc, CM_ASL_WLAN, wlan);
944 }
945
946 return 0;
947}
948
949static int eeepc_hotk_restore(struct device *device)
950{
951 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
952
953 /* Refresh both wlan rfkill state and pci hotplug */
954 if (eeepc->wlan_rfkill) {
955 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5");
956 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6");
957 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7");
958 }
959
960 if (eeepc->bluetooth_rfkill)
961 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
962 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
963 if (eeepc->wwan3g_rfkill)
964 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
965 get_acpi(eeepc, CM_ASL_3G) != 1);
966 if (eeepc->wimax_rfkill)
967 rfkill_set_sw_state(eeepc->wimax_rfkill,
968 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
969
970 return 0;
971}
972
973static const struct dev_pm_ops eeepc_pm_ops = {
974 .thaw = eeepc_hotk_thaw,
975 .restore = eeepc_hotk_restore,
976};
977
978static struct platform_driver platform_driver = {
979 .driver = {
980 .name = EEEPC_LAPTOP_FILE,
981 .owner = THIS_MODULE,
982 .pm = &eeepc_pm_ops,
983 }
984};
985
986/*
987 * Hwmon device
988 */
989
990#define EEEPC_EC_SC00 0x61
991#define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
992#define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
993#define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
994
995#define EEEPC_EC_SFB0 0xD0
996#define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
997
998static int eeepc_get_fan_pwm(void)
999{
1000 u8 value = 0;
1001
1002 ec_read(EEEPC_EC_FAN_PWM, &value);
1003 return value * 255 / 100;
1004}
1005
1006static void eeepc_set_fan_pwm(int value)
1007{
1008 value = SENSORS_LIMIT(value, 0, 255);
1009 value = value * 100 / 255;
1010 ec_write(EEEPC_EC_FAN_PWM, value);
1011}
1012
1013static int eeepc_get_fan_rpm(void)
1014{
1015 u8 high = 0;
1016 u8 low = 0;
1017
1018 ec_read(EEEPC_EC_FAN_HRPM, &high);
1019 ec_read(EEEPC_EC_FAN_LRPM, &low);
1020 return high << 8 | low;
1021}
1022
1023static int eeepc_get_fan_ctrl(void)
1024{
1025 u8 value = 0;
1026
1027 ec_read(EEEPC_EC_FAN_CTRL, &value);
1028 if (value & 0x02)
1029 return 1; /* manual */
1030 else
1031 return 2; /* automatic */
1032}
1033
1034static void eeepc_set_fan_ctrl(int manual)
1035{
1036 u8 value = 0;
1037
1038 ec_read(EEEPC_EC_FAN_CTRL, &value);
1039 if (manual == 1)
1040 value |= 0x02;
1041 else
1042 value &= ~0x02;
1043 ec_write(EEEPC_EC_FAN_CTRL, value);
1044}
1045
1046static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1047{
1048 int rv, value;
1049
1050 rv = parse_arg(buf, count, &value);
1051 if (rv > 0)
1052 set(value);
1053 return rv;
1054}
1055
1056static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1057{
1058 return sprintf(buf, "%d\n", get());
1059}
1060
1061#define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
1062 static ssize_t show_##_name(struct device *dev, \
1063 struct device_attribute *attr, \
1064 char *buf) \
1065 { \
1066 return show_sys_hwmon(_set, buf); \
1067 } \
1068 static ssize_t store_##_name(struct device *dev, \
1069 struct device_attribute *attr, \
1070 const char *buf, size_t count) \
1071 { \
1072 return store_sys_hwmon(_get, buf, count); \
1073 } \
1074 static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
1075
1076EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
1077EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
1078 eeepc_get_fan_pwm, eeepc_set_fan_pwm);
1079EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1080 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
1081
1082static ssize_t
1083show_name(struct device *dev, struct device_attribute *attr, char *buf)
1084{
1085 return sprintf(buf, "eeepc\n");
1086}
1087static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
1088
1089static struct attribute *hwmon_attributes[] = {
1090 &sensor_dev_attr_pwm1.dev_attr.attr,
1091 &sensor_dev_attr_fan1_input.dev_attr.attr,
1092 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1093 &sensor_dev_attr_name.dev_attr.attr,
1094 NULL
1095};
1096
1097static struct attribute_group hwmon_attribute_group = {
1098 .attrs = hwmon_attributes
1099};
1100
1101static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc)
1102{
1103 struct device *hwmon;
1104
1105 hwmon = eeepc->hwmon_device;
1106 if (!hwmon)
1107 return;
1108 sysfs_remove_group(&hwmon->kobj,
1109 &hwmon_attribute_group);
1110 hwmon_device_unregister(hwmon);
1111 eeepc->hwmon_device = NULL;
1112}
1113
1114static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1115{
1116 struct device *hwmon;
1117 int result;
1118
1119 hwmon = hwmon_device_register(&eeepc->platform_device->dev);
1120 if (IS_ERR(hwmon)) {
1121 pr_err("Could not register eeepc hwmon device\n");
1122 eeepc->hwmon_device = NULL;
1123 return PTR_ERR(hwmon);
1124 }
1125 eeepc->hwmon_device = hwmon;
1126 result = sysfs_create_group(&hwmon->kobj,
1127 &hwmon_attribute_group);
1128 if (result)
1129 eeepc_hwmon_exit(eeepc);
1130 return result;
1131}
1132
1133/*
1134 * Backlight device
1135 */
1136static int read_brightness(struct backlight_device *bd)
1137{
1138 struct eeepc_laptop *eeepc = bl_get_data(bd);
1139
1140 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1141}
1142
1143static int set_brightness(struct backlight_device *bd, int value)
1144{
1145 struct eeepc_laptop *eeepc = bl_get_data(bd);
1146
1147 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1148}
1149
1150static int update_bl_status(struct backlight_device *bd)
1151{
1152 return set_brightness(bd, bd->props.brightness);
1153}
1154
1155static const struct backlight_ops eeepcbl_ops = {
1156 .get_brightness = read_brightness,
1157 .update_status = update_bl_status,
1158};
1159
1160static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1161{
1162 struct backlight_device *bd = eeepc->backlight_device;
1163 int old = bd->props.brightness;
1164
1165 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1166
1167 return old;
1168}
1169
1170static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1171{
1172 struct backlight_properties props;
1173 struct backlight_device *bd;
1174
1175 memset(&props, 0, sizeof(struct backlight_properties));
1176 props.type = BACKLIGHT_PLATFORM;
1177 props.max_brightness = 15;
1178 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1179 &eeepc->platform_device->dev, eeepc,
1180 &eeepcbl_ops, &props);
1181 if (IS_ERR(bd)) {
1182 pr_err("Could not register eeepc backlight device\n");
1183 eeepc->backlight_device = NULL;
1184 return PTR_ERR(bd);
1185 }
1186 eeepc->backlight_device = bd;
1187 bd->props.brightness = read_brightness(bd);
1188 bd->props.power = FB_BLANK_UNBLANK;
1189 backlight_update_status(bd);
1190 return 0;
1191}
1192
1193static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1194{
1195 if (eeepc->backlight_device)
1196 backlight_device_unregister(eeepc->backlight_device);
1197 eeepc->backlight_device = NULL;
1198}
1199
1200
1201/*
1202 * Input device (i.e. hotkeys)
1203 */
1204static int eeepc_input_init(struct eeepc_laptop *eeepc)
1205{
1206 struct input_dev *input;
1207 int error;
1208
1209 input = input_allocate_device();
1210 if (!input) {
1211 pr_info("Unable to allocate input device\n");
1212 return -ENOMEM;
1213 }
1214
1215 input->name = "Asus EeePC extra buttons";
1216 input->phys = EEEPC_LAPTOP_FILE "/input0";
1217 input->id.bustype = BUS_HOST;
1218 input->dev.parent = &eeepc->platform_device->dev;
1219
1220 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1221 if (error) {
1222 pr_err("Unable to setup input device keymap\n");
1223 goto err_free_dev;
1224 }
1225
1226 error = input_register_device(input);
1227 if (error) {
1228 pr_err("Unable to register input device\n");
1229 goto err_free_keymap;
1230 }
1231
1232 eeepc->inputdev = input;
1233 return 0;
1234
1235err_free_keymap:
1236 sparse_keymap_free(input);
1237err_free_dev:
1238 input_free_device(input);
1239 return error;
1240}
1241
1242static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1243{
1244 if (eeepc->inputdev) {
1245 sparse_keymap_free(eeepc->inputdev);
1246 input_unregister_device(eeepc->inputdev);
1247 }
1248 eeepc->inputdev = NULL;
1249}
1250
1251/*
1252 * ACPI driver
1253 */
1254static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1255{
1256 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1257 u16 count;
1258
1259 if (event > ACPI_MAX_SYS_NOTIFY)
1260 return;
1261 count = eeepc->event_count[event % 128]++;
1262 acpi_bus_generate_proc_event(device, event, count);
1263 acpi_bus_generate_netlink_event(device->pnp.device_class,
1264 dev_name(&device->dev), event,
1265 count);
1266
1267 /* Brightness events are special */
1268 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
1269
1270 /* Ignore them completely if the acpi video driver is used */
1271 if (eeepc->backlight_device != NULL) {
1272 int old_brightness, new_brightness;
1273
1274 /* Update the backlight device. */
1275 old_brightness = eeepc_backlight_notify(eeepc);
1276
1277 /* Convert event to keypress (obsolescent hack) */
1278 new_brightness = event - NOTIFY_BRN_MIN;
1279
1280 if (new_brightness < old_brightness) {
1281 event = NOTIFY_BRN_MIN; /* brightness down */
1282 } else if (new_brightness > old_brightness) {
1283 event = NOTIFY_BRN_MAX; /* brightness up */
1284 } else {
1285 /*
1286 * no change in brightness - already at min/max,
1287 * event will be desired value (or else ignored)
1288 */
1289 }
1290 sparse_keymap_report_event(eeepc->inputdev, event,
1291 1, true);
1292 }
1293 } else {
1294 /* Everything else is a bona-fide keypress event */
1295 sparse_keymap_report_event(eeepc->inputdev, event, 1, true);
1296 }
1297}
1298
1299static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1300{
1301 const char *model;
1302
1303 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1304 if (!model)
1305 return;
1306
1307 /*
1308 * Blacklist for setting cpufv (cpu speed).
1309 *
1310 * EeePC 4G ("701") implements CFVS, but it is not supported
1311 * by the pre-installed OS, and the original option to change it
1312 * in the BIOS setup screen was removed in later versions.
1313 *
1314 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1315 * this applies to all "701" models (4G/4G Surf/2G Surf).
1316 *
1317 * So Asus made a deliberate decision not to support it on this model.
1318 * We have several reports that using it can cause the system to hang
1319 *
1320 * The hang has also been reported on a "702" (Model name "8G"?).
1321 *
1322 * We avoid dmi_check_system() / dmi_match(), because they use
1323 * substring matching. We don't want to affect the "701SD"
1324 * and "701SDX" models, because they do support S.H.E.
1325 */
1326 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1327 eeepc->cpufv_disabled = true;
1328 pr_info("model %s does not officially support setting cpu "
1329 "speed\n", model);
1330 pr_info("cpufv disabled to avoid instability\n");
1331 }
1332
1333 /*
1334 * Blacklist for wlan hotplug
1335 *
1336 * Eeepc 1005HA doesn't work like others models and don't need the
1337 * hotplug code. In fact, current hotplug code seems to unplug another
1338 * device...
1339 */
1340 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1341 strcmp(model, "1005PE") == 0) {
1342 eeepc->hotplug_disabled = true;
1343 pr_info("wlan hotplug disabled\n");
1344 }
1345}
1346
1347static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1348{
1349 int dummy;
1350
1351 /* Some BIOSes do not report cm although it is available.
1352 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1353 if (!(eeepc->cm_supported & (1 << cm))
1354 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1355 pr_info("%s (%x) not reported by BIOS,"
1356 " enabling anyway\n", name, 1 << cm);
1357 eeepc->cm_supported |= 1 << cm;
1358 }
1359}
1360
1361static void cmsg_quirks(struct eeepc_laptop *eeepc)
1362{
1363 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1364 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1365 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1366 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1367}
1368
1369static int __devinit eeepc_acpi_init(struct eeepc_laptop *eeepc)
1370{
1371 unsigned int init_flags;
1372 int result;
1373
1374 result = acpi_bus_get_status(eeepc->device);
1375 if (result)
1376 return result;
1377 if (!eeepc->device->status.present) {
1378 pr_err("Hotkey device not present, aborting\n");
1379 return -ENODEV;
1380 }
1381
1382 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1383 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1384
1385 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1386 pr_err("Hotkey initialization failed\n");
1387 return -ENODEV;
1388 }
1389
1390 /* get control methods supported */
1391 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1392 pr_err("Get control methods supported failed\n");
1393 return -ENODEV;
1394 }
1395 cmsg_quirks(eeepc);
1396 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1397
1398 return 0;
1399}
1400
1401static void __devinit eeepc_enable_camera(struct eeepc_laptop *eeepc)
1402{
1403 /*
1404 * If the following call to set_acpi() fails, it's because there's no
1405 * camera so we can ignore the error.
1406 */
1407 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1408 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1409}
1410
1411static bool eeepc_device_present;
1412
1413static int __devinit eeepc_acpi_add(struct acpi_device *device)
1414{
1415 struct eeepc_laptop *eeepc;
1416 int result;
1417
1418 pr_notice(EEEPC_LAPTOP_NAME "\n");
1419 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1420 if (!eeepc)
1421 return -ENOMEM;
1422 eeepc->handle = device->handle;
1423 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1424 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1425 device->driver_data = eeepc;
1426 eeepc->device = device;
1427
1428 eeepc->hotplug_disabled = hotplug_disabled;
1429
1430 eeepc_dmi_check(eeepc);
1431
1432 result = eeepc_acpi_init(eeepc);
1433 if (result)
1434 goto fail_platform;
1435 eeepc_enable_camera(eeepc);
1436
1437 /*
1438 * Register the platform device first. It is used as a parent for the
1439 * sub-devices below.
1440 *
1441 * Note that if there are multiple instances of this ACPI device it
1442 * will bail out, because the platform device is registered with a
1443 * fixed name. Of course it doesn't make sense to have more than one,
1444 * and machine-specific scripts find the fixed name convenient. But
1445 * It's also good for us to exclude multiple instances because both
1446 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1447 * (the EC and the wlan PCI slot respectively).
1448 */
1449 result = eeepc_platform_init(eeepc);
1450 if (result)
1451 goto fail_platform;
1452
1453 if (!acpi_video_backlight_support()) {
1454 result = eeepc_backlight_init(eeepc);
1455 if (result)
1456 goto fail_backlight;
1457 } else
1458 pr_info("Backlight controlled by ACPI video driver\n");
1459
1460 result = eeepc_input_init(eeepc);
1461 if (result)
1462 goto fail_input;
1463
1464 result = eeepc_hwmon_init(eeepc);
1465 if (result)
1466 goto fail_hwmon;
1467
1468 result = eeepc_led_init(eeepc);
1469 if (result)
1470 goto fail_led;
1471
1472 result = eeepc_rfkill_init(eeepc);
1473 if (result)
1474 goto fail_rfkill;
1475
1476 eeepc_device_present = true;
1477 return 0;
1478
1479fail_rfkill:
1480 eeepc_led_exit(eeepc);
1481fail_led:
1482 eeepc_hwmon_exit(eeepc);
1483fail_hwmon:
1484 eeepc_input_exit(eeepc);
1485fail_input:
1486 eeepc_backlight_exit(eeepc);
1487fail_backlight:
1488 eeepc_platform_exit(eeepc);
1489fail_platform:
1490 kfree(eeepc);
1491
1492 return result;
1493}
1494
1495static int eeepc_acpi_remove(struct acpi_device *device, int type)
1496{
1497 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1498
1499 eeepc_backlight_exit(eeepc);
1500 eeepc_rfkill_exit(eeepc);
1501 eeepc_input_exit(eeepc);
1502 eeepc_hwmon_exit(eeepc);
1503 eeepc_led_exit(eeepc);
1504 eeepc_platform_exit(eeepc);
1505
1506 kfree(eeepc);
1507 return 0;
1508}
1509
1510
1511static const struct acpi_device_id eeepc_device_ids[] = {
1512 {EEEPC_ACPI_HID, 0},
1513 {"", 0},
1514};
1515MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1516
1517static struct acpi_driver eeepc_acpi_driver = {
1518 .name = EEEPC_LAPTOP_NAME,
1519 .class = EEEPC_ACPI_CLASS,
1520 .owner = THIS_MODULE,
1521 .ids = eeepc_device_ids,
1522 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1523 .ops = {
1524 .add = eeepc_acpi_add,
1525 .remove = eeepc_acpi_remove,
1526 .notify = eeepc_acpi_notify,
1527 },
1528};
1529
1530
1531static int __init eeepc_laptop_init(void)
1532{
1533 int result;
1534
1535 result = platform_driver_register(&platform_driver);
1536 if (result < 0)
1537 return result;
1538
1539 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1540 if (result < 0)
1541 goto fail_acpi_driver;
1542
1543 if (!eeepc_device_present) {
1544 result = -ENODEV;
1545 goto fail_no_device;
1546 }
1547
1548 return 0;
1549
1550fail_no_device:
1551 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1552fail_acpi_driver:
1553 platform_driver_unregister(&platform_driver);
1554 return result;
1555}
1556
1557static void __exit eeepc_laptop_exit(void)
1558{
1559 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1560 platform_driver_unregister(&platform_driver);
1561}
1562
1563module_init(eeepc_laptop_init);
1564module_exit(eeepc_laptop_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * eeepc-laptop.c - Asus Eee PC extras
4 *
5 * Based on asus_acpi.c as patched for the Eee PC by Asus:
6 * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
7 * Based on eee.c from eeepc-linux
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/types.h>
16#include <linux/platform_device.h>
17#include <linux/backlight.h>
18#include <linux/fb.h>
19#include <linux/hwmon.h>
20#include <linux/hwmon-sysfs.h>
21#include <linux/slab.h>
22#include <linux/acpi.h>
23#include <linux/uaccess.h>
24#include <linux/input.h>
25#include <linux/input/sparse-keymap.h>
26#include <linux/rfkill.h>
27#include <linux/pci.h>
28#include <linux/pci_hotplug.h>
29#include <linux/leds.h>
30#include <linux/dmi.h>
31#include <acpi/video.h>
32
33#define EEEPC_LAPTOP_VERSION "0.1"
34#define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
35#define EEEPC_LAPTOP_FILE "eeepc"
36
37#define EEEPC_ACPI_CLASS "hotkey"
38#define EEEPC_ACPI_DEVICE_NAME "Hotkey"
39#define EEEPC_ACPI_HID "ASUS010"
40
41MODULE_AUTHOR("Corentin Chary, Eric Cooper");
42MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
43MODULE_LICENSE("GPL");
44
45static bool hotplug_disabled;
46
47module_param(hotplug_disabled, bool, 0444);
48MODULE_PARM_DESC(hotplug_disabled,
49 "Disable hotplug for wireless device. "
50 "If your laptop need that, please report to "
51 "acpi4asus-user@lists.sourceforge.net.");
52
53/*
54 * Definitions for Asus EeePC
55 */
56#define NOTIFY_BRN_MIN 0x20
57#define NOTIFY_BRN_MAX 0x2f
58
59enum {
60 DISABLE_ASL_WLAN = 0x0001,
61 DISABLE_ASL_BLUETOOTH = 0x0002,
62 DISABLE_ASL_IRDA = 0x0004,
63 DISABLE_ASL_CAMERA = 0x0008,
64 DISABLE_ASL_TV = 0x0010,
65 DISABLE_ASL_GPS = 0x0020,
66 DISABLE_ASL_DISPLAYSWITCH = 0x0040,
67 DISABLE_ASL_MODEM = 0x0080,
68 DISABLE_ASL_CARDREADER = 0x0100,
69 DISABLE_ASL_3G = 0x0200,
70 DISABLE_ASL_WIMAX = 0x0400,
71 DISABLE_ASL_HWCF = 0x0800
72};
73
74enum {
75 CM_ASL_WLAN = 0,
76 CM_ASL_BLUETOOTH,
77 CM_ASL_IRDA,
78 CM_ASL_1394,
79 CM_ASL_CAMERA,
80 CM_ASL_TV,
81 CM_ASL_GPS,
82 CM_ASL_DVDROM,
83 CM_ASL_DISPLAYSWITCH,
84 CM_ASL_PANELBRIGHT,
85 CM_ASL_BIOSFLASH,
86 CM_ASL_ACPIFLASH,
87 CM_ASL_CPUFV,
88 CM_ASL_CPUTEMPERATURE,
89 CM_ASL_FANCPU,
90 CM_ASL_FANCHASSIS,
91 CM_ASL_USBPORT1,
92 CM_ASL_USBPORT2,
93 CM_ASL_USBPORT3,
94 CM_ASL_MODEM,
95 CM_ASL_CARDREADER,
96 CM_ASL_3G,
97 CM_ASL_WIMAX,
98 CM_ASL_HWCF,
99 CM_ASL_LID,
100 CM_ASL_TYPE,
101 CM_ASL_PANELPOWER, /*P901*/
102 CM_ASL_TPD
103};
104
105static const char *cm_getv[] = {
106 "WLDG", "BTHG", NULL, NULL,
107 "CAMG", NULL, NULL, NULL,
108 NULL, "PBLG", NULL, NULL,
109 "CFVG", NULL, NULL, NULL,
110 "USBG", NULL, NULL, "MODG",
111 "CRDG", "M3GG", "WIMG", "HWCF",
112 "LIDG", "TYPE", "PBPG", "TPDG"
113};
114
115static const char *cm_setv[] = {
116 "WLDS", "BTHS", NULL, NULL,
117 "CAMS", NULL, NULL, NULL,
118 "SDSP", "PBLS", "HDPS", NULL,
119 "CFVS", NULL, NULL, NULL,
120 "USBG", NULL, NULL, "MODS",
121 "CRDS", "M3GS", "WIMS", NULL,
122 NULL, NULL, "PBPS", "TPDS"
123};
124
125static const struct key_entry eeepc_keymap[] = {
126 { KE_KEY, 0x10, { KEY_WLAN } },
127 { KE_KEY, 0x11, { KEY_WLAN } },
128 { KE_KEY, 0x12, { KEY_PROG1 } },
129 { KE_KEY, 0x13, { KEY_MUTE } },
130 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
131 { KE_KEY, 0x15, { KEY_VOLUMEUP } },
132 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
133 { KE_KEY, 0x1a, { KEY_COFFEE } },
134 { KE_KEY, 0x1b, { KEY_ZOOM } },
135 { KE_KEY, 0x1c, { KEY_PROG2 } },
136 { KE_KEY, 0x1d, { KEY_PROG3 } },
137 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
138 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
139 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
140 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
141 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
142 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
143 { KE_KEY, 0x38, { KEY_F14 } },
144 { KE_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */
145 { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */
146 { KE_END, 0 },
147};
148
149/*
150 * This is the main structure, we can use it to store useful information
151 */
152struct eeepc_laptop {
153 acpi_handle handle; /* the handle of the acpi device */
154 u32 cm_supported; /* the control methods supported
155 by this BIOS */
156 bool cpufv_disabled;
157 bool hotplug_disabled;
158 u16 event_count[128]; /* count for each event */
159
160 struct platform_device *platform_device;
161 struct acpi_device *device; /* the device we are in */
162 struct backlight_device *backlight_device;
163
164 struct input_dev *inputdev;
165
166 struct rfkill *wlan_rfkill;
167 struct rfkill *bluetooth_rfkill;
168 struct rfkill *wwan3g_rfkill;
169 struct rfkill *wimax_rfkill;
170
171 struct hotplug_slot hotplug_slot;
172 struct mutex hotplug_lock;
173
174 struct led_classdev tpd_led;
175 int tpd_led_wk;
176 struct workqueue_struct *led_workqueue;
177 struct work_struct tpd_led_work;
178};
179
180/*
181 * ACPI Helpers
182 */
183static int write_acpi_int(acpi_handle handle, const char *method, int val)
184{
185 acpi_status status;
186
187 status = acpi_execute_simple_method(handle, (char *)method, val);
188
189 return (status == AE_OK ? 0 : -1);
190}
191
192static int read_acpi_int(acpi_handle handle, const char *method, int *val)
193{
194 acpi_status status;
195 unsigned long long result;
196
197 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
198 if (ACPI_FAILURE(status)) {
199 *val = -1;
200 return -1;
201 } else {
202 *val = result;
203 return 0;
204 }
205}
206
207static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
208{
209 const char *method = cm_setv[cm];
210
211 if (method == NULL)
212 return -ENODEV;
213 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
214 return -ENODEV;
215
216 if (write_acpi_int(eeepc->handle, method, value))
217 pr_warn("Error writing %s\n", method);
218 return 0;
219}
220
221static int get_acpi(struct eeepc_laptop *eeepc, int cm)
222{
223 const char *method = cm_getv[cm];
224 int value;
225
226 if (method == NULL)
227 return -ENODEV;
228 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
229 return -ENODEV;
230
231 if (read_acpi_int(eeepc->handle, method, &value))
232 pr_warn("Error reading %s\n", method);
233 return value;
234}
235
236static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
237 acpi_handle *handle)
238{
239 const char *method = cm_setv[cm];
240 acpi_status status;
241
242 if (method == NULL)
243 return -ENODEV;
244 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
245 return -ENODEV;
246
247 status = acpi_get_handle(eeepc->handle, (char *)method,
248 handle);
249 if (status != AE_OK) {
250 pr_warn("Error finding %s\n", method);
251 return -ENODEV;
252 }
253 return 0;
254}
255
256
257/*
258 * Sys helpers
259 */
260static int parse_arg(const char *buf, int *val)
261{
262 if (sscanf(buf, "%i", val) != 1)
263 return -EINVAL;
264 return 0;
265}
266
267static ssize_t store_sys_acpi(struct device *dev, int cm,
268 const char *buf, size_t count)
269{
270 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
271 int rv, value;
272
273 rv = parse_arg(buf, &value);
274 if (rv < 0)
275 return rv;
276 rv = set_acpi(eeepc, cm, value);
277 if (rv < 0)
278 return -EIO;
279 return count;
280}
281
282static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
283{
284 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
285 int value = get_acpi(eeepc, cm);
286
287 if (value < 0)
288 return -EIO;
289 return sprintf(buf, "%d\n", value);
290}
291
292#define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
293 static ssize_t _name##_show(struct device *dev, \
294 struct device_attribute *attr, \
295 char *buf) \
296 { \
297 return show_sys_acpi(dev, _cm, buf); \
298 }
299
300#define EEEPC_ACPI_STORE_FUNC(_name, _cm) \
301 static ssize_t _name##_store(struct device *dev, \
302 struct device_attribute *attr, \
303 const char *buf, size_t count) \
304 { \
305 return store_sys_acpi(dev, _cm, buf, count); \
306 }
307
308#define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \
309 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
310 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
311 static DEVICE_ATTR_RW(_name)
312
313#define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \
314 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
315 static DEVICE_ATTR_WO(_name)
316
317EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
318EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
319EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH);
320
321struct eeepc_cpufv {
322 int num;
323 int cur;
324};
325
326static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
327{
328 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
329 if (c->cur < 0)
330 return -ENODEV;
331
332 c->num = (c->cur >> 8) & 0xff;
333 c->cur &= 0xff;
334 if (c->num == 0 || c->num > 12)
335 return -ENODEV;
336 return 0;
337}
338
339static ssize_t available_cpufv_show(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
356static ssize_t cpufv_show(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
368static ssize_t cpufv_store(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, &value);
381 if (rv < 0)
382 return rv;
383 if (value < 0 || value >= c.num)
384 return -EINVAL;
385 rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
386 if (rv)
387 return rv;
388 return count;
389}
390
391static ssize_t cpufv_disabled_show(struct device *dev,
392 struct device_attribute *attr,
393 char *buf)
394{
395 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
396
397 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
398}
399
400static ssize_t cpufv_disabled_store(struct device *dev,
401 struct device_attribute *attr,
402 const char *buf, size_t count)
403{
404 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
405 int rv, value;
406
407 rv = parse_arg(buf, &value);
408 if (rv < 0)
409 return rv;
410
411 switch (value) {
412 case 0:
413 if (eeepc->cpufv_disabled)
414 pr_warn("cpufv enabled (not officially supported on this model)\n");
415 eeepc->cpufv_disabled = false;
416 return count;
417 case 1:
418 return -EPERM;
419 default:
420 return -EINVAL;
421 }
422}
423
424
425static DEVICE_ATTR_RW(cpufv);
426static DEVICE_ATTR_RO(available_cpufv);
427static DEVICE_ATTR_RW(cpufv_disabled);
428
429static struct attribute *platform_attributes[] = {
430 &dev_attr_camera.attr,
431 &dev_attr_cardr.attr,
432 &dev_attr_disp.attr,
433 &dev_attr_cpufv.attr,
434 &dev_attr_available_cpufv.attr,
435 &dev_attr_cpufv_disabled.attr,
436 NULL
437};
438
439static const struct attribute_group platform_attribute_group = {
440 .attrs = platform_attributes
441};
442
443static int eeepc_platform_init(struct eeepc_laptop *eeepc)
444{
445 int result;
446
447 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
448 if (!eeepc->platform_device)
449 return -ENOMEM;
450 platform_set_drvdata(eeepc->platform_device, eeepc);
451
452 result = platform_device_add(eeepc->platform_device);
453 if (result)
454 goto fail_platform_device;
455
456 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
457 &platform_attribute_group);
458 if (result)
459 goto fail_sysfs;
460 return 0;
461
462fail_sysfs:
463 platform_device_del(eeepc->platform_device);
464fail_platform_device:
465 platform_device_put(eeepc->platform_device);
466 return result;
467}
468
469static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
470{
471 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
472 &platform_attribute_group);
473 platform_device_unregister(eeepc->platform_device);
474}
475
476/*
477 * LEDs
478 */
479/*
480 * These functions actually update the LED's, and are called from a
481 * workqueue. By doing this as separate work rather than when the LED
482 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
483 * potentially bad time, such as a timer interrupt.
484 */
485static void tpd_led_update(struct work_struct *work)
486{
487 struct eeepc_laptop *eeepc;
488
489 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
490
491 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
492}
493
494static void tpd_led_set(struct led_classdev *led_cdev,
495 enum led_brightness value)
496{
497 struct eeepc_laptop *eeepc;
498
499 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
500
501 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
502 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
503}
504
505static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
506{
507 struct eeepc_laptop *eeepc;
508
509 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
510
511 return get_acpi(eeepc, CM_ASL_TPD);
512}
513
514static int eeepc_led_init(struct eeepc_laptop *eeepc)
515{
516 int rv;
517
518 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
519 return 0;
520
521 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
522 if (!eeepc->led_workqueue)
523 return -ENOMEM;
524 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
525
526 eeepc->tpd_led.name = "eeepc::touchpad";
527 eeepc->tpd_led.brightness_set = tpd_led_set;
528 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
529 eeepc->tpd_led.brightness_get = tpd_led_get;
530 eeepc->tpd_led.max_brightness = 1;
531
532 rv = led_classdev_register(&eeepc->platform_device->dev,
533 &eeepc->tpd_led);
534 if (rv) {
535 destroy_workqueue(eeepc->led_workqueue);
536 return rv;
537 }
538
539 return 0;
540}
541
542static void eeepc_led_exit(struct eeepc_laptop *eeepc)
543{
544 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
545 led_classdev_unregister(&eeepc->tpd_led);
546 if (eeepc->led_workqueue)
547 destroy_workqueue(eeepc->led_workqueue);
548}
549
550
551/*
552 * PCI hotplug (for wlan rfkill)
553 */
554static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
555{
556 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
557 return false;
558 return true;
559}
560
561static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
562{
563 struct pci_dev *port;
564 struct pci_dev *dev;
565 struct pci_bus *bus;
566 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
567 bool absent;
568 u32 l;
569
570 if (eeepc->wlan_rfkill)
571 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
572
573 mutex_lock(&eeepc->hotplug_lock);
574 pci_lock_rescan_remove();
575
576 if (!eeepc->hotplug_slot.ops)
577 goto out_unlock;
578
579 port = acpi_get_pci_dev(handle);
580 if (!port) {
581 pr_warning("Unable to find port\n");
582 goto out_unlock;
583 }
584
585 bus = port->subordinate;
586
587 if (!bus) {
588 pr_warn("Unable to find PCI bus 1?\n");
589 goto out_put_dev;
590 }
591
592 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
593 pr_err("Unable to read PCI config space?\n");
594 goto out_put_dev;
595 }
596
597 absent = (l == 0xffffffff);
598
599 if (blocked != absent) {
600 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
601 blocked ? "blocked" : "unblocked",
602 absent ? "absent" : "present");
603 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
604 goto out_put_dev;
605 }
606
607 if (!blocked) {
608 dev = pci_get_slot(bus, 0);
609 if (dev) {
610 /* Device already present */
611 pci_dev_put(dev);
612 goto out_put_dev;
613 }
614 dev = pci_scan_single_device(bus, 0);
615 if (dev) {
616 pci_bus_assign_resources(bus);
617 pci_bus_add_device(dev);
618 }
619 } else {
620 dev = pci_get_slot(bus, 0);
621 if (dev) {
622 pci_stop_and_remove_bus_device(dev);
623 pci_dev_put(dev);
624 }
625 }
626out_put_dev:
627 pci_dev_put(port);
628
629out_unlock:
630 pci_unlock_rescan_remove();
631 mutex_unlock(&eeepc->hotplug_lock);
632}
633
634static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
635{
636 acpi_status status = AE_OK;
637 acpi_handle handle;
638
639 status = acpi_get_handle(NULL, node, &handle);
640
641 if (ACPI_SUCCESS(status))
642 eeepc_rfkill_hotplug(eeepc, handle);
643}
644
645static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
646{
647 struct eeepc_laptop *eeepc = data;
648
649 if (event != ACPI_NOTIFY_BUS_CHECK)
650 return;
651
652 eeepc_rfkill_hotplug(eeepc, handle);
653}
654
655static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
656 char *node)
657{
658 acpi_status status;
659 acpi_handle handle;
660
661 status = acpi_get_handle(NULL, node, &handle);
662
663 if (ACPI_FAILURE(status))
664 return -ENODEV;
665
666 status = acpi_install_notify_handler(handle,
667 ACPI_SYSTEM_NOTIFY,
668 eeepc_rfkill_notify,
669 eeepc);
670 if (ACPI_FAILURE(status))
671 pr_warn("Failed to register notify on %s\n", node);
672
673 /*
674 * Refresh pci hotplug in case the rfkill state was
675 * changed during setup.
676 */
677 eeepc_rfkill_hotplug(eeepc, handle);
678 return 0;
679}
680
681static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
682 char *node)
683{
684 acpi_status status = AE_OK;
685 acpi_handle handle;
686
687 status = acpi_get_handle(NULL, node, &handle);
688
689 if (ACPI_FAILURE(status))
690 return;
691
692 status = acpi_remove_notify_handler(handle,
693 ACPI_SYSTEM_NOTIFY,
694 eeepc_rfkill_notify);
695 if (ACPI_FAILURE(status))
696 pr_err("Error removing rfkill notify handler %s\n",
697 node);
698 /*
699 * Refresh pci hotplug in case the rfkill
700 * state was changed after
701 * eeepc_unregister_rfkill_notifier()
702 */
703 eeepc_rfkill_hotplug(eeepc, handle);
704}
705
706static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
707 u8 *value)
708{
709 struct eeepc_laptop *eeepc;
710 int val;
711
712 eeepc = container_of(hotplug_slot, struct eeepc_laptop, hotplug_slot);
713 val = get_acpi(eeepc, CM_ASL_WLAN);
714
715 if (val == 1 || val == 0)
716 *value = val;
717 else
718 return -EINVAL;
719
720 return 0;
721}
722
723static const struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
724 .get_adapter_status = eeepc_get_adapter_status,
725 .get_power_status = eeepc_get_adapter_status,
726};
727
728static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
729{
730 int ret = -ENOMEM;
731 struct pci_bus *bus = pci_find_bus(0, 1);
732
733 if (!bus) {
734 pr_err("Unable to find wifi PCI bus\n");
735 return -ENODEV;
736 }
737
738 eeepc->hotplug_slot.ops = &eeepc_hotplug_slot_ops;
739
740 ret = pci_hp_register(&eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
741 if (ret) {
742 pr_err("Unable to register hotplug slot - %d\n", ret);
743 goto error_register;
744 }
745
746 return 0;
747
748error_register:
749 eeepc->hotplug_slot.ops = NULL;
750 return ret;
751}
752
753/*
754 * Rfkill devices
755 */
756static int eeepc_rfkill_set(void *data, bool blocked)
757{
758 acpi_handle handle = data;
759
760 return write_acpi_int(handle, NULL, !blocked);
761}
762
763static const struct rfkill_ops eeepc_rfkill_ops = {
764 .set_block = eeepc_rfkill_set,
765};
766
767static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
768 struct rfkill **rfkill,
769 const char *name,
770 enum rfkill_type type, int cm)
771{
772 acpi_handle handle;
773 int result;
774
775 result = acpi_setter_handle(eeepc, cm, &handle);
776 if (result < 0)
777 return result;
778
779 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
780 &eeepc_rfkill_ops, handle);
781
782 if (!*rfkill)
783 return -EINVAL;
784
785 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
786 result = rfkill_register(*rfkill);
787 if (result) {
788 rfkill_destroy(*rfkill);
789 *rfkill = NULL;
790 return result;
791 }
792 return 0;
793}
794
795static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
796static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
797static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
798
799static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
800{
801 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
802 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
803 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
804 if (eeepc->wlan_rfkill) {
805 rfkill_unregister(eeepc->wlan_rfkill);
806 rfkill_destroy(eeepc->wlan_rfkill);
807 eeepc->wlan_rfkill = NULL;
808 }
809
810 if (eeepc->hotplug_slot.ops)
811 pci_hp_deregister(&eeepc->hotplug_slot);
812
813 if (eeepc->bluetooth_rfkill) {
814 rfkill_unregister(eeepc->bluetooth_rfkill);
815 rfkill_destroy(eeepc->bluetooth_rfkill);
816 eeepc->bluetooth_rfkill = NULL;
817 }
818 if (eeepc->wwan3g_rfkill) {
819 rfkill_unregister(eeepc->wwan3g_rfkill);
820 rfkill_destroy(eeepc->wwan3g_rfkill);
821 eeepc->wwan3g_rfkill = NULL;
822 }
823 if (eeepc->wimax_rfkill) {
824 rfkill_unregister(eeepc->wimax_rfkill);
825 rfkill_destroy(eeepc->wimax_rfkill);
826 eeepc->wimax_rfkill = NULL;
827 }
828}
829
830static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
831{
832 int result = 0;
833
834 mutex_init(&eeepc->hotplug_lock);
835
836 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
837 "eeepc-wlan", RFKILL_TYPE_WLAN,
838 CM_ASL_WLAN);
839
840 if (result && result != -ENODEV)
841 goto exit;
842
843 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
844 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
845 CM_ASL_BLUETOOTH);
846
847 if (result && result != -ENODEV)
848 goto exit;
849
850 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
851 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
852 CM_ASL_3G);
853
854 if (result && result != -ENODEV)
855 goto exit;
856
857 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
858 "eeepc-wimax", RFKILL_TYPE_WIMAX,
859 CM_ASL_WIMAX);
860
861 if (result && result != -ENODEV)
862 goto exit;
863
864 if (eeepc->hotplug_disabled)
865 return 0;
866
867 result = eeepc_setup_pci_hotplug(eeepc);
868 /*
869 * If we get -EBUSY then something else is handling the PCI hotplug -
870 * don't fail in this case
871 */
872 if (result == -EBUSY)
873 result = 0;
874
875 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
876 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
877 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
878
879exit:
880 if (result && result != -ENODEV)
881 eeepc_rfkill_exit(eeepc);
882 return result;
883}
884
885/*
886 * Platform driver - hibernate/resume callbacks
887 */
888static int eeepc_hotk_thaw(struct device *device)
889{
890 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
891
892 if (eeepc->wlan_rfkill) {
893 int wlan;
894
895 /*
896 * Work around bios bug - acpi _PTS turns off the wireless led
897 * during suspend. Normally it restores it on resume, but
898 * we should kick it ourselves in case hibernation is aborted.
899 */
900 wlan = get_acpi(eeepc, CM_ASL_WLAN);
901 if (wlan >= 0)
902 set_acpi(eeepc, CM_ASL_WLAN, wlan);
903 }
904
905 return 0;
906}
907
908static int eeepc_hotk_restore(struct device *device)
909{
910 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
911
912 /* Refresh both wlan rfkill state and pci hotplug */
913 if (eeepc->wlan_rfkill) {
914 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
915 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
916 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
917 }
918
919 if (eeepc->bluetooth_rfkill)
920 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
921 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
922 if (eeepc->wwan3g_rfkill)
923 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
924 get_acpi(eeepc, CM_ASL_3G) != 1);
925 if (eeepc->wimax_rfkill)
926 rfkill_set_sw_state(eeepc->wimax_rfkill,
927 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
928
929 return 0;
930}
931
932static const struct dev_pm_ops eeepc_pm_ops = {
933 .thaw = eeepc_hotk_thaw,
934 .restore = eeepc_hotk_restore,
935};
936
937static struct platform_driver platform_driver = {
938 .driver = {
939 .name = EEEPC_LAPTOP_FILE,
940 .pm = &eeepc_pm_ops,
941 }
942};
943
944/*
945 * Hwmon device
946 */
947
948#define EEEPC_EC_SC00 0x61
949#define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
950#define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
951#define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
952
953#define EEEPC_EC_SFB0 0xD0
954#define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
955
956static inline int eeepc_pwm_to_lmsensors(int value)
957{
958 return value * 255 / 100;
959}
960
961static inline int eeepc_lmsensors_to_pwm(int value)
962{
963 value = clamp_val(value, 0, 255);
964 return value * 100 / 255;
965}
966
967static int eeepc_get_fan_pwm(void)
968{
969 u8 value = 0;
970
971 ec_read(EEEPC_EC_FAN_PWM, &value);
972 return eeepc_pwm_to_lmsensors(value);
973}
974
975static void eeepc_set_fan_pwm(int value)
976{
977 value = eeepc_lmsensors_to_pwm(value);
978 ec_write(EEEPC_EC_FAN_PWM, value);
979}
980
981static int eeepc_get_fan_rpm(void)
982{
983 u8 high = 0;
984 u8 low = 0;
985
986 ec_read(EEEPC_EC_FAN_HRPM, &high);
987 ec_read(EEEPC_EC_FAN_LRPM, &low);
988 return high << 8 | low;
989}
990
991#define EEEPC_EC_FAN_CTRL_BIT 0x02
992#define EEEPC_FAN_CTRL_MANUAL 1
993#define EEEPC_FAN_CTRL_AUTO 2
994
995static int eeepc_get_fan_ctrl(void)
996{
997 u8 value = 0;
998
999 ec_read(EEEPC_EC_FAN_CTRL, &value);
1000 if (value & EEEPC_EC_FAN_CTRL_BIT)
1001 return EEEPC_FAN_CTRL_MANUAL;
1002 else
1003 return EEEPC_FAN_CTRL_AUTO;
1004}
1005
1006static void eeepc_set_fan_ctrl(int manual)
1007{
1008 u8 value = 0;
1009
1010 ec_read(EEEPC_EC_FAN_CTRL, &value);
1011 if (manual == EEEPC_FAN_CTRL_MANUAL)
1012 value |= EEEPC_EC_FAN_CTRL_BIT;
1013 else
1014 value &= ~EEEPC_EC_FAN_CTRL_BIT;
1015 ec_write(EEEPC_EC_FAN_CTRL, value);
1016}
1017
1018static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1019{
1020 int rv, value;
1021
1022 rv = parse_arg(buf, &value);
1023 if (rv < 0)
1024 return rv;
1025 set(value);
1026 return count;
1027}
1028
1029static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1030{
1031 return sprintf(buf, "%d\n", get());
1032}
1033
1034#define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1035 static ssize_t _name##_show(struct device *dev, \
1036 struct device_attribute *attr, \
1037 char *buf) \
1038 { \
1039 return show_sys_hwmon(_get, buf); \
1040 }
1041
1042#define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1043 static ssize_t _name##_store(struct device *dev, \
1044 struct device_attribute *attr, \
1045 const char *buf, size_t count) \
1046 { \
1047 return store_sys_hwmon(_set, buf, count); \
1048 }
1049
1050#define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1051 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1052 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1053 static DEVICE_ATTR_RW(_name)
1054
1055#define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1056 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1057 static DEVICE_ATTR_RO(_name)
1058
1059EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1060EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1061 eeepc_set_fan_pwm);
1062EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1063 eeepc_set_fan_ctrl);
1064
1065static struct attribute *hwmon_attrs[] = {
1066 &dev_attr_pwm1.attr,
1067 &dev_attr_fan1_input.attr,
1068 &dev_attr_pwm1_enable.attr,
1069 NULL
1070};
1071ATTRIBUTE_GROUPS(hwmon);
1072
1073static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1074{
1075 struct device *dev = &eeepc->platform_device->dev;
1076 struct device *hwmon;
1077
1078 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1079 hwmon_groups);
1080 if (IS_ERR(hwmon)) {
1081 pr_err("Could not register eeepc hwmon device\n");
1082 return PTR_ERR(hwmon);
1083 }
1084 return 0;
1085}
1086
1087/*
1088 * Backlight device
1089 */
1090static int read_brightness(struct backlight_device *bd)
1091{
1092 struct eeepc_laptop *eeepc = bl_get_data(bd);
1093
1094 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1095}
1096
1097static int set_brightness(struct backlight_device *bd, int value)
1098{
1099 struct eeepc_laptop *eeepc = bl_get_data(bd);
1100
1101 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1102}
1103
1104static int update_bl_status(struct backlight_device *bd)
1105{
1106 return set_brightness(bd, bd->props.brightness);
1107}
1108
1109static const struct backlight_ops eeepcbl_ops = {
1110 .get_brightness = read_brightness,
1111 .update_status = update_bl_status,
1112};
1113
1114static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1115{
1116 struct backlight_device *bd = eeepc->backlight_device;
1117 int old = bd->props.brightness;
1118
1119 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1120
1121 return old;
1122}
1123
1124static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1125{
1126 struct backlight_properties props;
1127 struct backlight_device *bd;
1128
1129 memset(&props, 0, sizeof(struct backlight_properties));
1130 props.type = BACKLIGHT_PLATFORM;
1131 props.max_brightness = 15;
1132 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1133 &eeepc->platform_device->dev, eeepc,
1134 &eeepcbl_ops, &props);
1135 if (IS_ERR(bd)) {
1136 pr_err("Could not register eeepc backlight device\n");
1137 eeepc->backlight_device = NULL;
1138 return PTR_ERR(bd);
1139 }
1140 eeepc->backlight_device = bd;
1141 bd->props.brightness = read_brightness(bd);
1142 bd->props.power = FB_BLANK_UNBLANK;
1143 backlight_update_status(bd);
1144 return 0;
1145}
1146
1147static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1148{
1149 backlight_device_unregister(eeepc->backlight_device);
1150 eeepc->backlight_device = NULL;
1151}
1152
1153
1154/*
1155 * Input device (i.e. hotkeys)
1156 */
1157static int eeepc_input_init(struct eeepc_laptop *eeepc)
1158{
1159 struct input_dev *input;
1160 int error;
1161
1162 input = input_allocate_device();
1163 if (!input)
1164 return -ENOMEM;
1165
1166 input->name = "Asus EeePC extra buttons";
1167 input->phys = EEEPC_LAPTOP_FILE "/input0";
1168 input->id.bustype = BUS_HOST;
1169 input->dev.parent = &eeepc->platform_device->dev;
1170
1171 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1172 if (error) {
1173 pr_err("Unable to setup input device keymap\n");
1174 goto err_free_dev;
1175 }
1176
1177 error = input_register_device(input);
1178 if (error) {
1179 pr_err("Unable to register input device\n");
1180 goto err_free_dev;
1181 }
1182
1183 eeepc->inputdev = input;
1184 return 0;
1185
1186err_free_dev:
1187 input_free_device(input);
1188 return error;
1189}
1190
1191static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1192{
1193 if (eeepc->inputdev)
1194 input_unregister_device(eeepc->inputdev);
1195 eeepc->inputdev = NULL;
1196}
1197
1198/*
1199 * ACPI driver
1200 */
1201static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1202{
1203 if (!eeepc->inputdev)
1204 return;
1205 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1206 pr_info("Unknown key %x pressed\n", event);
1207}
1208
1209static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1210{
1211 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1212 int old_brightness, new_brightness;
1213 u16 count;
1214
1215 if (event > ACPI_MAX_SYS_NOTIFY)
1216 return;
1217 count = eeepc->event_count[event % 128]++;
1218 acpi_bus_generate_netlink_event(device->pnp.device_class,
1219 dev_name(&device->dev), event,
1220 count);
1221
1222 /* Brightness events are special */
1223 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1224 eeepc_input_notify(eeepc, event);
1225 return;
1226 }
1227
1228 /* Ignore them completely if the acpi video driver is used */
1229 if (!eeepc->backlight_device)
1230 return;
1231
1232 /* Update the backlight device. */
1233 old_brightness = eeepc_backlight_notify(eeepc);
1234
1235 /* Convert event to keypress (obsolescent hack) */
1236 new_brightness = event - NOTIFY_BRN_MIN;
1237
1238 if (new_brightness < old_brightness) {
1239 event = NOTIFY_BRN_MIN; /* brightness down */
1240 } else if (new_brightness > old_brightness) {
1241 event = NOTIFY_BRN_MAX; /* brightness up */
1242 } else {
1243 /*
1244 * no change in brightness - already at min/max,
1245 * event will be desired value (or else ignored)
1246 */
1247 }
1248 eeepc_input_notify(eeepc, event);
1249}
1250
1251static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1252{
1253 const char *model;
1254
1255 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1256 if (!model)
1257 return;
1258
1259 /*
1260 * Blacklist for setting cpufv (cpu speed).
1261 *
1262 * EeePC 4G ("701") implements CFVS, but it is not supported
1263 * by the pre-installed OS, and the original option to change it
1264 * in the BIOS setup screen was removed in later versions.
1265 *
1266 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1267 * this applies to all "701" models (4G/4G Surf/2G Surf).
1268 *
1269 * So Asus made a deliberate decision not to support it on this model.
1270 * We have several reports that using it can cause the system to hang
1271 *
1272 * The hang has also been reported on a "702" (Model name "8G"?).
1273 *
1274 * We avoid dmi_check_system() / dmi_match(), because they use
1275 * substring matching. We don't want to affect the "701SD"
1276 * and "701SDX" models, because they do support S.H.E.
1277 */
1278 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1279 eeepc->cpufv_disabled = true;
1280 pr_info("model %s does not officially support setting cpu speed\n",
1281 model);
1282 pr_info("cpufv disabled to avoid instability\n");
1283 }
1284
1285 /*
1286 * Blacklist for wlan hotplug
1287 *
1288 * Eeepc 1005HA doesn't work like others models and don't need the
1289 * hotplug code. In fact, current hotplug code seems to unplug another
1290 * device...
1291 */
1292 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1293 strcmp(model, "1005PE") == 0) {
1294 eeepc->hotplug_disabled = true;
1295 pr_info("wlan hotplug disabled\n");
1296 }
1297}
1298
1299static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1300{
1301 int dummy;
1302
1303 /* Some BIOSes do not report cm although it is available.
1304 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1305 if (!(eeepc->cm_supported & (1 << cm))
1306 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1307 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1308 name, 1 << cm);
1309 eeepc->cm_supported |= 1 << cm;
1310 }
1311}
1312
1313static void cmsg_quirks(struct eeepc_laptop *eeepc)
1314{
1315 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1316 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1317 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1318 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1319}
1320
1321static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1322{
1323 unsigned int init_flags;
1324 int result;
1325
1326 result = acpi_bus_get_status(eeepc->device);
1327 if (result)
1328 return result;
1329 if (!eeepc->device->status.present) {
1330 pr_err("Hotkey device not present, aborting\n");
1331 return -ENODEV;
1332 }
1333
1334 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1335 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1336
1337 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1338 pr_err("Hotkey initialization failed\n");
1339 return -ENODEV;
1340 }
1341
1342 /* get control methods supported */
1343 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1344 pr_err("Get control methods supported failed\n");
1345 return -ENODEV;
1346 }
1347 cmsg_quirks(eeepc);
1348 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1349
1350 return 0;
1351}
1352
1353static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1354{
1355 /*
1356 * If the following call to set_acpi() fails, it's because there's no
1357 * camera so we can ignore the error.
1358 */
1359 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1360 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1361}
1362
1363static bool eeepc_device_present;
1364
1365static int eeepc_acpi_add(struct acpi_device *device)
1366{
1367 struct eeepc_laptop *eeepc;
1368 int result;
1369
1370 pr_notice(EEEPC_LAPTOP_NAME "\n");
1371 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1372 if (!eeepc)
1373 return -ENOMEM;
1374 eeepc->handle = device->handle;
1375 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1376 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1377 device->driver_data = eeepc;
1378 eeepc->device = device;
1379
1380 eeepc->hotplug_disabled = hotplug_disabled;
1381
1382 eeepc_dmi_check(eeepc);
1383
1384 result = eeepc_acpi_init(eeepc);
1385 if (result)
1386 goto fail_platform;
1387 eeepc_enable_camera(eeepc);
1388
1389 /*
1390 * Register the platform device first. It is used as a parent for the
1391 * sub-devices below.
1392 *
1393 * Note that if there are multiple instances of this ACPI device it
1394 * will bail out, because the platform device is registered with a
1395 * fixed name. Of course it doesn't make sense to have more than one,
1396 * and machine-specific scripts find the fixed name convenient. But
1397 * It's also good for us to exclude multiple instances because both
1398 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1399 * (the EC and the wlan PCI slot respectively).
1400 */
1401 result = eeepc_platform_init(eeepc);
1402 if (result)
1403 goto fail_platform;
1404
1405 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1406 result = eeepc_backlight_init(eeepc);
1407 if (result)
1408 goto fail_backlight;
1409 }
1410
1411 result = eeepc_input_init(eeepc);
1412 if (result)
1413 goto fail_input;
1414
1415 result = eeepc_hwmon_init(eeepc);
1416 if (result)
1417 goto fail_hwmon;
1418
1419 result = eeepc_led_init(eeepc);
1420 if (result)
1421 goto fail_led;
1422
1423 result = eeepc_rfkill_init(eeepc);
1424 if (result)
1425 goto fail_rfkill;
1426
1427 eeepc_device_present = true;
1428 return 0;
1429
1430fail_rfkill:
1431 eeepc_led_exit(eeepc);
1432fail_led:
1433fail_hwmon:
1434 eeepc_input_exit(eeepc);
1435fail_input:
1436 eeepc_backlight_exit(eeepc);
1437fail_backlight:
1438 eeepc_platform_exit(eeepc);
1439fail_platform:
1440 kfree(eeepc);
1441
1442 return result;
1443}
1444
1445static int eeepc_acpi_remove(struct acpi_device *device)
1446{
1447 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1448
1449 eeepc_backlight_exit(eeepc);
1450 eeepc_rfkill_exit(eeepc);
1451 eeepc_input_exit(eeepc);
1452 eeepc_led_exit(eeepc);
1453 eeepc_platform_exit(eeepc);
1454
1455 kfree(eeepc);
1456 return 0;
1457}
1458
1459
1460static const struct acpi_device_id eeepc_device_ids[] = {
1461 {EEEPC_ACPI_HID, 0},
1462 {"", 0},
1463};
1464MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1465
1466static struct acpi_driver eeepc_acpi_driver = {
1467 .name = EEEPC_LAPTOP_NAME,
1468 .class = EEEPC_ACPI_CLASS,
1469 .owner = THIS_MODULE,
1470 .ids = eeepc_device_ids,
1471 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1472 .ops = {
1473 .add = eeepc_acpi_add,
1474 .remove = eeepc_acpi_remove,
1475 .notify = eeepc_acpi_notify,
1476 },
1477};
1478
1479
1480static int __init eeepc_laptop_init(void)
1481{
1482 int result;
1483
1484 result = platform_driver_register(&platform_driver);
1485 if (result < 0)
1486 return result;
1487
1488 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1489 if (result < 0)
1490 goto fail_acpi_driver;
1491
1492 if (!eeepc_device_present) {
1493 result = -ENODEV;
1494 goto fail_no_device;
1495 }
1496
1497 return 0;
1498
1499fail_no_device:
1500 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1501fail_acpi_driver:
1502 platform_driver_unregister(&platform_driver);
1503 return result;
1504}
1505
1506static void __exit eeepc_laptop_exit(void)
1507{
1508 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1509 platform_driver_unregister(&platform_driver);
1510}
1511
1512module_init(eeepc_laptop_init);
1513module_exit(eeepc_laptop_exit);