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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, PLATFORM_DEVID_NONE);
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 led_classdev_unregister(&eeepc->tpd_led);
545 if (eeepc->led_workqueue)
546 destroy_workqueue(eeepc->led_workqueue);
547}
548
549/*
550 * PCI hotplug (for wlan rfkill)
551 */
552static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
553{
554 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
555 return false;
556 return true;
557}
558
559static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
560{
561 struct pci_dev *port;
562 struct pci_dev *dev;
563 struct pci_bus *bus;
564 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
565 bool absent;
566 u32 l;
567
568 if (eeepc->wlan_rfkill)
569 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
570
571 mutex_lock(&eeepc->hotplug_lock);
572 pci_lock_rescan_remove();
573
574 if (!eeepc->hotplug_slot.ops)
575 goto out_unlock;
576
577 port = acpi_get_pci_dev(handle);
578 if (!port) {
579 pr_warn("Unable to find port\n");
580 goto out_unlock;
581 }
582
583 bus = port->subordinate;
584
585 if (!bus) {
586 pr_warn("Unable to find PCI bus 1?\n");
587 goto out_put_dev;
588 }
589
590 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
591 pr_err("Unable to read PCI config space?\n");
592 goto out_put_dev;
593 }
594
595 absent = (l == 0xffffffff);
596
597 if (blocked != absent) {
598 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
599 blocked ? "blocked" : "unblocked",
600 absent ? "absent" : "present");
601 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
602 goto out_put_dev;
603 }
604
605 if (!blocked) {
606 dev = pci_get_slot(bus, 0);
607 if (dev) {
608 /* Device already present */
609 pci_dev_put(dev);
610 goto out_put_dev;
611 }
612 dev = pci_scan_single_device(bus, 0);
613 if (dev) {
614 pci_bus_assign_resources(bus);
615 pci_bus_add_device(dev);
616 }
617 } else {
618 dev = pci_get_slot(bus, 0);
619 if (dev) {
620 pci_stop_and_remove_bus_device(dev);
621 pci_dev_put(dev);
622 }
623 }
624out_put_dev:
625 pci_dev_put(port);
626
627out_unlock:
628 pci_unlock_rescan_remove();
629 mutex_unlock(&eeepc->hotplug_lock);
630}
631
632static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
633{
634 acpi_status status = AE_OK;
635 acpi_handle handle;
636
637 status = acpi_get_handle(NULL, node, &handle);
638
639 if (ACPI_SUCCESS(status))
640 eeepc_rfkill_hotplug(eeepc, handle);
641}
642
643static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
644{
645 struct eeepc_laptop *eeepc = data;
646
647 if (event != ACPI_NOTIFY_BUS_CHECK)
648 return;
649
650 eeepc_rfkill_hotplug(eeepc, handle);
651}
652
653static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
654 char *node)
655{
656 acpi_status status;
657 acpi_handle handle;
658
659 status = acpi_get_handle(NULL, node, &handle);
660
661 if (ACPI_FAILURE(status))
662 return -ENODEV;
663
664 status = acpi_install_notify_handler(handle,
665 ACPI_SYSTEM_NOTIFY,
666 eeepc_rfkill_notify,
667 eeepc);
668 if (ACPI_FAILURE(status))
669 pr_warn("Failed to register notify on %s\n", node);
670
671 /*
672 * Refresh pci hotplug in case the rfkill state was
673 * changed during setup.
674 */
675 eeepc_rfkill_hotplug(eeepc, handle);
676 return 0;
677}
678
679static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
680 char *node)
681{
682 acpi_status status = AE_OK;
683 acpi_handle handle;
684
685 status = acpi_get_handle(NULL, node, &handle);
686
687 if (ACPI_FAILURE(status))
688 return;
689
690 status = acpi_remove_notify_handler(handle,
691 ACPI_SYSTEM_NOTIFY,
692 eeepc_rfkill_notify);
693 if (ACPI_FAILURE(status))
694 pr_err("Error removing rfkill notify handler %s\n",
695 node);
696 /*
697 * Refresh pci hotplug in case the rfkill
698 * state was changed after
699 * eeepc_unregister_rfkill_notifier()
700 */
701 eeepc_rfkill_hotplug(eeepc, handle);
702}
703
704static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
705 u8 *value)
706{
707 struct eeepc_laptop *eeepc;
708 int val;
709
710 eeepc = container_of(hotplug_slot, struct eeepc_laptop, hotplug_slot);
711 val = get_acpi(eeepc, CM_ASL_WLAN);
712
713 if (val == 1 || val == 0)
714 *value = val;
715 else
716 return -EINVAL;
717
718 return 0;
719}
720
721static const struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
722 .get_adapter_status = eeepc_get_adapter_status,
723 .get_power_status = eeepc_get_adapter_status,
724};
725
726static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
727{
728 int ret = -ENOMEM;
729 struct pci_bus *bus = pci_find_bus(0, 1);
730
731 if (!bus) {
732 pr_err("Unable to find wifi PCI bus\n");
733 return -ENODEV;
734 }
735
736 eeepc->hotplug_slot.ops = &eeepc_hotplug_slot_ops;
737
738 ret = pci_hp_register(&eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
739 if (ret) {
740 pr_err("Unable to register hotplug slot - %d\n", ret);
741 goto error_register;
742 }
743
744 return 0;
745
746error_register:
747 eeepc->hotplug_slot.ops = NULL;
748 return ret;
749}
750
751/*
752 * Rfkill devices
753 */
754static int eeepc_rfkill_set(void *data, bool blocked)
755{
756 acpi_handle handle = data;
757
758 return write_acpi_int(handle, NULL, !blocked);
759}
760
761static const struct rfkill_ops eeepc_rfkill_ops = {
762 .set_block = eeepc_rfkill_set,
763};
764
765static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
766 struct rfkill **rfkill,
767 const char *name,
768 enum rfkill_type type, int cm)
769{
770 acpi_handle handle;
771 int result;
772
773 result = acpi_setter_handle(eeepc, cm, &handle);
774 if (result < 0)
775 return result;
776
777 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
778 &eeepc_rfkill_ops, handle);
779
780 if (!*rfkill)
781 return -EINVAL;
782
783 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
784 result = rfkill_register(*rfkill);
785 if (result) {
786 rfkill_destroy(*rfkill);
787 *rfkill = NULL;
788 return result;
789 }
790 return 0;
791}
792
793static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
794static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
795static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
796
797static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
798{
799 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
800 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
801 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
802 if (eeepc->wlan_rfkill) {
803 rfkill_unregister(eeepc->wlan_rfkill);
804 rfkill_destroy(eeepc->wlan_rfkill);
805 eeepc->wlan_rfkill = NULL;
806 }
807
808 if (eeepc->hotplug_slot.ops)
809 pci_hp_deregister(&eeepc->hotplug_slot);
810
811 if (eeepc->bluetooth_rfkill) {
812 rfkill_unregister(eeepc->bluetooth_rfkill);
813 rfkill_destroy(eeepc->bluetooth_rfkill);
814 eeepc->bluetooth_rfkill = NULL;
815 }
816 if (eeepc->wwan3g_rfkill) {
817 rfkill_unregister(eeepc->wwan3g_rfkill);
818 rfkill_destroy(eeepc->wwan3g_rfkill);
819 eeepc->wwan3g_rfkill = NULL;
820 }
821 if (eeepc->wimax_rfkill) {
822 rfkill_unregister(eeepc->wimax_rfkill);
823 rfkill_destroy(eeepc->wimax_rfkill);
824 eeepc->wimax_rfkill = NULL;
825 }
826}
827
828static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
829{
830 int result = 0;
831
832 mutex_init(&eeepc->hotplug_lock);
833
834 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
835 "eeepc-wlan", RFKILL_TYPE_WLAN,
836 CM_ASL_WLAN);
837
838 if (result && result != -ENODEV)
839 goto exit;
840
841 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
842 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
843 CM_ASL_BLUETOOTH);
844
845 if (result && result != -ENODEV)
846 goto exit;
847
848 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
849 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
850 CM_ASL_3G);
851
852 if (result && result != -ENODEV)
853 goto exit;
854
855 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
856 "eeepc-wimax", RFKILL_TYPE_WIMAX,
857 CM_ASL_WIMAX);
858
859 if (result && result != -ENODEV)
860 goto exit;
861
862 if (eeepc->hotplug_disabled)
863 return 0;
864
865 result = eeepc_setup_pci_hotplug(eeepc);
866 /*
867 * If we get -EBUSY then something else is handling the PCI hotplug -
868 * don't fail in this case
869 */
870 if (result == -EBUSY)
871 result = 0;
872
873 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
874 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
875 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
876
877exit:
878 if (result && result != -ENODEV)
879 eeepc_rfkill_exit(eeepc);
880 return result;
881}
882
883/*
884 * Platform driver - hibernate/resume callbacks
885 */
886static int eeepc_hotk_thaw(struct device *device)
887{
888 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
889
890 if (eeepc->wlan_rfkill) {
891 int wlan;
892
893 /*
894 * Work around bios bug - acpi _PTS turns off the wireless led
895 * during suspend. Normally it restores it on resume, but
896 * we should kick it ourselves in case hibernation is aborted.
897 */
898 wlan = get_acpi(eeepc, CM_ASL_WLAN);
899 if (wlan >= 0)
900 set_acpi(eeepc, CM_ASL_WLAN, wlan);
901 }
902
903 return 0;
904}
905
906static int eeepc_hotk_restore(struct device *device)
907{
908 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
909
910 /* Refresh both wlan rfkill state and pci hotplug */
911 if (eeepc->wlan_rfkill) {
912 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
913 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
914 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
915 }
916
917 if (eeepc->bluetooth_rfkill)
918 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
919 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
920 if (eeepc->wwan3g_rfkill)
921 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
922 get_acpi(eeepc, CM_ASL_3G) != 1);
923 if (eeepc->wimax_rfkill)
924 rfkill_set_sw_state(eeepc->wimax_rfkill,
925 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
926
927 return 0;
928}
929
930static const struct dev_pm_ops eeepc_pm_ops = {
931 .thaw = eeepc_hotk_thaw,
932 .restore = eeepc_hotk_restore,
933};
934
935static struct platform_driver platform_driver = {
936 .driver = {
937 .name = EEEPC_LAPTOP_FILE,
938 .pm = &eeepc_pm_ops,
939 }
940};
941
942/*
943 * Hwmon device
944 */
945
946#define EEEPC_EC_SC00 0x61
947#define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
948#define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
949#define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
950
951#define EEEPC_EC_SFB0 0xD0
952#define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
953
954static inline int eeepc_pwm_to_lmsensors(int value)
955{
956 return value * 255 / 100;
957}
958
959static inline int eeepc_lmsensors_to_pwm(int value)
960{
961 value = clamp_val(value, 0, 255);
962 return value * 100 / 255;
963}
964
965static int eeepc_get_fan_pwm(void)
966{
967 u8 value = 0;
968
969 ec_read(EEEPC_EC_FAN_PWM, &value);
970 return eeepc_pwm_to_lmsensors(value);
971}
972
973static void eeepc_set_fan_pwm(int value)
974{
975 value = eeepc_lmsensors_to_pwm(value);
976 ec_write(EEEPC_EC_FAN_PWM, value);
977}
978
979static int eeepc_get_fan_rpm(void)
980{
981 u8 high = 0;
982 u8 low = 0;
983
984 ec_read(EEEPC_EC_FAN_HRPM, &high);
985 ec_read(EEEPC_EC_FAN_LRPM, &low);
986 return high << 8 | low;
987}
988
989#define EEEPC_EC_FAN_CTRL_BIT 0x02
990#define EEEPC_FAN_CTRL_MANUAL 1
991#define EEEPC_FAN_CTRL_AUTO 2
992
993static int eeepc_get_fan_ctrl(void)
994{
995 u8 value = 0;
996
997 ec_read(EEEPC_EC_FAN_CTRL, &value);
998 if (value & EEEPC_EC_FAN_CTRL_BIT)
999 return EEEPC_FAN_CTRL_MANUAL;
1000 else
1001 return EEEPC_FAN_CTRL_AUTO;
1002}
1003
1004static void eeepc_set_fan_ctrl(int manual)
1005{
1006 u8 value = 0;
1007
1008 ec_read(EEEPC_EC_FAN_CTRL, &value);
1009 if (manual == EEEPC_FAN_CTRL_MANUAL)
1010 value |= EEEPC_EC_FAN_CTRL_BIT;
1011 else
1012 value &= ~EEEPC_EC_FAN_CTRL_BIT;
1013 ec_write(EEEPC_EC_FAN_CTRL, value);
1014}
1015
1016static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1017{
1018 int rv, value;
1019
1020 rv = parse_arg(buf, &value);
1021 if (rv < 0)
1022 return rv;
1023 set(value);
1024 return count;
1025}
1026
1027static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1028{
1029 return sprintf(buf, "%d\n", get());
1030}
1031
1032#define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1033 static ssize_t _name##_show(struct device *dev, \
1034 struct device_attribute *attr, \
1035 char *buf) \
1036 { \
1037 return show_sys_hwmon(_get, buf); \
1038 }
1039
1040#define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1041 static ssize_t _name##_store(struct device *dev, \
1042 struct device_attribute *attr, \
1043 const char *buf, size_t count) \
1044 { \
1045 return store_sys_hwmon(_set, buf, count); \
1046 }
1047
1048#define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1049 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1050 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1051 static DEVICE_ATTR_RW(_name)
1052
1053#define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1054 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1055 static DEVICE_ATTR_RO(_name)
1056
1057EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1058EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1059 eeepc_set_fan_pwm);
1060EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1061 eeepc_set_fan_ctrl);
1062
1063static struct attribute *hwmon_attrs[] = {
1064 &dev_attr_pwm1.attr,
1065 &dev_attr_fan1_input.attr,
1066 &dev_attr_pwm1_enable.attr,
1067 NULL
1068};
1069ATTRIBUTE_GROUPS(hwmon);
1070
1071static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1072{
1073 struct device *dev = &eeepc->platform_device->dev;
1074 struct device *hwmon;
1075
1076 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1077 hwmon_groups);
1078 if (IS_ERR(hwmon)) {
1079 pr_err("Could not register eeepc hwmon device\n");
1080 return PTR_ERR(hwmon);
1081 }
1082 return 0;
1083}
1084
1085/*
1086 * Backlight device
1087 */
1088static int read_brightness(struct backlight_device *bd)
1089{
1090 struct eeepc_laptop *eeepc = bl_get_data(bd);
1091
1092 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1093}
1094
1095static int set_brightness(struct backlight_device *bd, int value)
1096{
1097 struct eeepc_laptop *eeepc = bl_get_data(bd);
1098
1099 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1100}
1101
1102static int update_bl_status(struct backlight_device *bd)
1103{
1104 return set_brightness(bd, bd->props.brightness);
1105}
1106
1107static const struct backlight_ops eeepcbl_ops = {
1108 .get_brightness = read_brightness,
1109 .update_status = update_bl_status,
1110};
1111
1112static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1113{
1114 struct backlight_device *bd = eeepc->backlight_device;
1115 int old = bd->props.brightness;
1116
1117 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1118
1119 return old;
1120}
1121
1122static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1123{
1124 struct backlight_properties props;
1125 struct backlight_device *bd;
1126
1127 memset(&props, 0, sizeof(struct backlight_properties));
1128 props.type = BACKLIGHT_PLATFORM;
1129 props.max_brightness = 15;
1130 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1131 &eeepc->platform_device->dev, eeepc,
1132 &eeepcbl_ops, &props);
1133 if (IS_ERR(bd)) {
1134 pr_err("Could not register eeepc backlight device\n");
1135 eeepc->backlight_device = NULL;
1136 return PTR_ERR(bd);
1137 }
1138 eeepc->backlight_device = bd;
1139 bd->props.brightness = read_brightness(bd);
1140 bd->props.power = FB_BLANK_UNBLANK;
1141 backlight_update_status(bd);
1142 return 0;
1143}
1144
1145static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1146{
1147 backlight_device_unregister(eeepc->backlight_device);
1148 eeepc->backlight_device = NULL;
1149}
1150
1151
1152/*
1153 * Input device (i.e. hotkeys)
1154 */
1155static int eeepc_input_init(struct eeepc_laptop *eeepc)
1156{
1157 struct input_dev *input;
1158 int error;
1159
1160 input = input_allocate_device();
1161 if (!input)
1162 return -ENOMEM;
1163
1164 input->name = "Asus EeePC extra buttons";
1165 input->phys = EEEPC_LAPTOP_FILE "/input0";
1166 input->id.bustype = BUS_HOST;
1167 input->dev.parent = &eeepc->platform_device->dev;
1168
1169 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1170 if (error) {
1171 pr_err("Unable to setup input device keymap\n");
1172 goto err_free_dev;
1173 }
1174
1175 error = input_register_device(input);
1176 if (error) {
1177 pr_err("Unable to register input device\n");
1178 goto err_free_dev;
1179 }
1180
1181 eeepc->inputdev = input;
1182 return 0;
1183
1184err_free_dev:
1185 input_free_device(input);
1186 return error;
1187}
1188
1189static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1190{
1191 if (eeepc->inputdev)
1192 input_unregister_device(eeepc->inputdev);
1193 eeepc->inputdev = NULL;
1194}
1195
1196/*
1197 * ACPI driver
1198 */
1199static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1200{
1201 if (!eeepc->inputdev)
1202 return;
1203 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1204 pr_info("Unknown key %x pressed\n", event);
1205}
1206
1207static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1208{
1209 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1210 int old_brightness, new_brightness;
1211 u16 count;
1212
1213 if (event > ACPI_MAX_SYS_NOTIFY)
1214 return;
1215 count = eeepc->event_count[event % 128]++;
1216 acpi_bus_generate_netlink_event(device->pnp.device_class,
1217 dev_name(&device->dev), event,
1218 count);
1219
1220 /* Brightness events are special */
1221 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1222 eeepc_input_notify(eeepc, event);
1223 return;
1224 }
1225
1226 /* Ignore them completely if the acpi video driver is used */
1227 if (!eeepc->backlight_device)
1228 return;
1229
1230 /* Update the backlight device. */
1231 old_brightness = eeepc_backlight_notify(eeepc);
1232
1233 /* Convert event to keypress (obsolescent hack) */
1234 new_brightness = event - NOTIFY_BRN_MIN;
1235
1236 if (new_brightness < old_brightness) {
1237 event = NOTIFY_BRN_MIN; /* brightness down */
1238 } else if (new_brightness > old_brightness) {
1239 event = NOTIFY_BRN_MAX; /* brightness up */
1240 } else {
1241 /*
1242 * no change in brightness - already at min/max,
1243 * event will be desired value (or else ignored)
1244 */
1245 }
1246 eeepc_input_notify(eeepc, event);
1247}
1248
1249static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1250{
1251 const char *model;
1252
1253 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1254 if (!model)
1255 return;
1256
1257 /*
1258 * Blacklist for setting cpufv (cpu speed).
1259 *
1260 * EeePC 4G ("701") implements CFVS, but it is not supported
1261 * by the pre-installed OS, and the original option to change it
1262 * in the BIOS setup screen was removed in later versions.
1263 *
1264 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1265 * this applies to all "701" models (4G/4G Surf/2G Surf).
1266 *
1267 * So Asus made a deliberate decision not to support it on this model.
1268 * We have several reports that using it can cause the system to hang
1269 *
1270 * The hang has also been reported on a "702" (Model name "8G"?).
1271 *
1272 * We avoid dmi_check_system() / dmi_match(), because they use
1273 * substring matching. We don't want to affect the "701SD"
1274 * and "701SDX" models, because they do support S.H.E.
1275 */
1276 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1277 eeepc->cpufv_disabled = true;
1278 pr_info("model %s does not officially support setting cpu speed\n",
1279 model);
1280 pr_info("cpufv disabled to avoid instability\n");
1281 }
1282
1283 /*
1284 * Blacklist for wlan hotplug
1285 *
1286 * Eeepc 1005HA doesn't work like others models and don't need the
1287 * hotplug code. In fact, current hotplug code seems to unplug another
1288 * device...
1289 */
1290 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1291 strcmp(model, "1005PE") == 0) {
1292 eeepc->hotplug_disabled = true;
1293 pr_info("wlan hotplug disabled\n");
1294 }
1295}
1296
1297static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1298{
1299 int dummy;
1300
1301 /* Some BIOSes do not report cm although it is available.
1302 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1303 if (!(eeepc->cm_supported & (1 << cm))
1304 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1305 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1306 name, 1 << cm);
1307 eeepc->cm_supported |= 1 << cm;
1308 }
1309}
1310
1311static void cmsg_quirks(struct eeepc_laptop *eeepc)
1312{
1313 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1314 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1315 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1316 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1317}
1318
1319static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1320{
1321 unsigned int init_flags;
1322 int result;
1323
1324 result = acpi_bus_get_status(eeepc->device);
1325 if (result)
1326 return result;
1327 if (!eeepc->device->status.present) {
1328 pr_err("Hotkey device not present, aborting\n");
1329 return -ENODEV;
1330 }
1331
1332 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1333 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1334
1335 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1336 pr_err("Hotkey initialization failed\n");
1337 return -ENODEV;
1338 }
1339
1340 /* get control methods supported */
1341 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1342 pr_err("Get control methods supported failed\n");
1343 return -ENODEV;
1344 }
1345 cmsg_quirks(eeepc);
1346 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1347
1348 return 0;
1349}
1350
1351static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1352{
1353 /*
1354 * If the following call to set_acpi() fails, it's because there's no
1355 * camera so we can ignore the error.
1356 */
1357 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1358 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1359}
1360
1361static bool eeepc_device_present;
1362
1363static int eeepc_acpi_add(struct acpi_device *device)
1364{
1365 struct eeepc_laptop *eeepc;
1366 int result;
1367
1368 pr_notice(EEEPC_LAPTOP_NAME "\n");
1369 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1370 if (!eeepc)
1371 return -ENOMEM;
1372 eeepc->handle = device->handle;
1373 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1374 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1375 device->driver_data = eeepc;
1376 eeepc->device = device;
1377
1378 eeepc->hotplug_disabled = hotplug_disabled;
1379
1380 eeepc_dmi_check(eeepc);
1381
1382 result = eeepc_acpi_init(eeepc);
1383 if (result)
1384 goto fail_platform;
1385 eeepc_enable_camera(eeepc);
1386
1387 /*
1388 * Register the platform device first. It is used as a parent for the
1389 * sub-devices below.
1390 *
1391 * Note that if there are multiple instances of this ACPI device it
1392 * will bail out, because the platform device is registered with a
1393 * fixed name. Of course it doesn't make sense to have more than one,
1394 * and machine-specific scripts find the fixed name convenient. But
1395 * It's also good for us to exclude multiple instances because both
1396 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1397 * (the EC and the wlan PCI slot respectively).
1398 */
1399 result = eeepc_platform_init(eeepc);
1400 if (result)
1401 goto fail_platform;
1402
1403 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1404 result = eeepc_backlight_init(eeepc);
1405 if (result)
1406 goto fail_backlight;
1407 }
1408
1409 result = eeepc_input_init(eeepc);
1410 if (result)
1411 goto fail_input;
1412
1413 result = eeepc_hwmon_init(eeepc);
1414 if (result)
1415 goto fail_hwmon;
1416
1417 result = eeepc_led_init(eeepc);
1418 if (result)
1419 goto fail_led;
1420
1421 result = eeepc_rfkill_init(eeepc);
1422 if (result)
1423 goto fail_rfkill;
1424
1425 eeepc_device_present = true;
1426 return 0;
1427
1428fail_rfkill:
1429 eeepc_led_exit(eeepc);
1430fail_led:
1431fail_hwmon:
1432 eeepc_input_exit(eeepc);
1433fail_input:
1434 eeepc_backlight_exit(eeepc);
1435fail_backlight:
1436 eeepc_platform_exit(eeepc);
1437fail_platform:
1438 kfree(eeepc);
1439
1440 return result;
1441}
1442
1443static void eeepc_acpi_remove(struct acpi_device *device)
1444{
1445 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1446
1447 eeepc_backlight_exit(eeepc);
1448 eeepc_rfkill_exit(eeepc);
1449 eeepc_input_exit(eeepc);
1450 eeepc_led_exit(eeepc);
1451 eeepc_platform_exit(eeepc);
1452
1453 kfree(eeepc);
1454}
1455
1456
1457static const struct acpi_device_id eeepc_device_ids[] = {
1458 {EEEPC_ACPI_HID, 0},
1459 {"", 0},
1460};
1461MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1462
1463static struct acpi_driver eeepc_acpi_driver = {
1464 .name = EEEPC_LAPTOP_NAME,
1465 .class = EEEPC_ACPI_CLASS,
1466 .owner = THIS_MODULE,
1467 .ids = eeepc_device_ids,
1468 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1469 .ops = {
1470 .add = eeepc_acpi_add,
1471 .remove = eeepc_acpi_remove,
1472 .notify = eeepc_acpi_notify,
1473 },
1474};
1475
1476
1477static int __init eeepc_laptop_init(void)
1478{
1479 int result;
1480
1481 result = platform_driver_register(&platform_driver);
1482 if (result < 0)
1483 return result;
1484
1485 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1486 if (result < 0)
1487 goto fail_acpi_driver;
1488
1489 if (!eeepc_device_present) {
1490 result = -ENODEV;
1491 goto fail_no_device;
1492 }
1493
1494 return 0;
1495
1496fail_no_device:
1497 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1498fail_acpi_driver:
1499 platform_driver_unregister(&platform_driver);
1500 return result;
1501}
1502
1503static void __exit eeepc_laptop_exit(void)
1504{
1505 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1506 platform_driver_unregister(&platform_driver);
1507}
1508
1509module_init(eeepc_laptop_init);
1510module_exit(eeepc_laptop_exit);
1/*
2 * eeepc-laptop.c - Asus Eee PC extras
3 *
4 * Based on asus_acpi.c as patched for the Eee PC by Asus:
5 * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
6 * Based on eee.c from eeepc-linux
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/types.h>
25#include <linux/platform_device.h>
26#include <linux/backlight.h>
27#include <linux/fb.h>
28#include <linux/hwmon.h>
29#include <linux/hwmon-sysfs.h>
30#include <linux/slab.h>
31#include <linux/acpi.h>
32#include <linux/uaccess.h>
33#include <linux/input.h>
34#include <linux/input/sparse-keymap.h>
35#include <linux/rfkill.h>
36#include <linux/pci.h>
37#include <linux/pci_hotplug.h>
38#include <linux/leds.h>
39#include <linux/dmi.h>
40#include <acpi/video.h>
41
42#define EEEPC_LAPTOP_VERSION "0.1"
43#define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
44#define EEEPC_LAPTOP_FILE "eeepc"
45
46#define EEEPC_ACPI_CLASS "hotkey"
47#define EEEPC_ACPI_DEVICE_NAME "Hotkey"
48#define EEEPC_ACPI_HID "ASUS010"
49
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 backlight_device *backlight_device;
170
171 struct input_dev *inputdev;
172
173 struct rfkill *wlan_rfkill;
174 struct rfkill *bluetooth_rfkill;
175 struct rfkill *wwan3g_rfkill;
176 struct rfkill *wimax_rfkill;
177
178 struct hotplug_slot *hotplug_slot;
179 struct mutex hotplug_lock;
180
181 struct led_classdev tpd_led;
182 int tpd_led_wk;
183 struct workqueue_struct *led_workqueue;
184 struct work_struct tpd_led_work;
185};
186
187/*
188 * ACPI Helpers
189 */
190static int write_acpi_int(acpi_handle handle, const char *method, int val)
191{
192 acpi_status status;
193
194 status = acpi_execute_simple_method(handle, (char *)method, val);
195
196 return (status == AE_OK ? 0 : -1);
197}
198
199static int read_acpi_int(acpi_handle handle, const char *method, int *val)
200{
201 acpi_status status;
202 unsigned long long result;
203
204 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
205 if (ACPI_FAILURE(status)) {
206 *val = -1;
207 return -1;
208 } else {
209 *val = result;
210 return 0;
211 }
212}
213
214static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
215{
216 const char *method = cm_setv[cm];
217
218 if (method == NULL)
219 return -ENODEV;
220 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
221 return -ENODEV;
222
223 if (write_acpi_int(eeepc->handle, method, value))
224 pr_warn("Error writing %s\n", method);
225 return 0;
226}
227
228static int get_acpi(struct eeepc_laptop *eeepc, int cm)
229{
230 const char *method = cm_getv[cm];
231 int value;
232
233 if (method == NULL)
234 return -ENODEV;
235 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
236 return -ENODEV;
237
238 if (read_acpi_int(eeepc->handle, method, &value))
239 pr_warn("Error reading %s\n", method);
240 return value;
241}
242
243static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
244 acpi_handle *handle)
245{
246 const char *method = cm_setv[cm];
247 acpi_status status;
248
249 if (method == NULL)
250 return -ENODEV;
251 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
252 return -ENODEV;
253
254 status = acpi_get_handle(eeepc->handle, (char *)method,
255 handle);
256 if (status != AE_OK) {
257 pr_warn("Error finding %s\n", method);
258 return -ENODEV;
259 }
260 return 0;
261}
262
263
264/*
265 * Sys helpers
266 */
267static int parse_arg(const char *buf, int *val)
268{
269 if (sscanf(buf, "%i", val) != 1)
270 return -EINVAL;
271 return 0;
272}
273
274static ssize_t store_sys_acpi(struct device *dev, int cm,
275 const char *buf, size_t count)
276{
277 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
278 int rv, value;
279
280 rv = parse_arg(buf, &value);
281 if (rv < 0)
282 return rv;
283 rv = set_acpi(eeepc, cm, value);
284 if (rv < 0)
285 return -EIO;
286 return count;
287}
288
289static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
290{
291 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
292 int value = get_acpi(eeepc, cm);
293
294 if (value < 0)
295 return -EIO;
296 return sprintf(buf, "%d\n", value);
297}
298
299#define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
300 static ssize_t _name##_show(struct device *dev, \
301 struct device_attribute *attr, \
302 char *buf) \
303 { \
304 return show_sys_acpi(dev, _cm, buf); \
305 }
306
307#define EEEPC_ACPI_STORE_FUNC(_name, _cm) \
308 static ssize_t _name##_store(struct device *dev, \
309 struct device_attribute *attr, \
310 const char *buf, size_t count) \
311 { \
312 return store_sys_acpi(dev, _cm, buf, count); \
313 }
314
315#define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \
316 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
317 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
318 static DEVICE_ATTR_RW(_name)
319
320#define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \
321 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
322 static DEVICE_ATTR_WO(_name)
323
324EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
325EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
326EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH);
327
328struct eeepc_cpufv {
329 int num;
330 int cur;
331};
332
333static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
334{
335 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
336 if (c->cur < 0)
337 return -ENODEV;
338
339 c->num = (c->cur >> 8) & 0xff;
340 c->cur &= 0xff;
341 if (c->num == 0 || c->num > 12)
342 return -ENODEV;
343 return 0;
344}
345
346static ssize_t available_cpufv_show(struct device *dev,
347 struct device_attribute *attr,
348 char *buf)
349{
350 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
351 struct eeepc_cpufv c;
352 int i;
353 ssize_t len = 0;
354
355 if (get_cpufv(eeepc, &c))
356 return -ENODEV;
357 for (i = 0; i < c.num; i++)
358 len += sprintf(buf + len, "%d ", i);
359 len += sprintf(buf + len, "\n");
360 return len;
361}
362
363static ssize_t cpufv_show(struct device *dev,
364 struct device_attribute *attr,
365 char *buf)
366{
367 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
368 struct eeepc_cpufv c;
369
370 if (get_cpufv(eeepc, &c))
371 return -ENODEV;
372 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
373}
374
375static ssize_t cpufv_store(struct device *dev,
376 struct device_attribute *attr,
377 const char *buf, size_t count)
378{
379 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
380 struct eeepc_cpufv c;
381 int rv, value;
382
383 if (eeepc->cpufv_disabled)
384 return -EPERM;
385 if (get_cpufv(eeepc, &c))
386 return -ENODEV;
387 rv = parse_arg(buf, &value);
388 if (rv < 0)
389 return rv;
390 if (value < 0 || value >= c.num)
391 return -EINVAL;
392 rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
393 if (rv)
394 return rv;
395 return count;
396}
397
398static ssize_t cpufv_disabled_show(struct device *dev,
399 struct device_attribute *attr,
400 char *buf)
401{
402 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
403
404 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
405}
406
407static ssize_t cpufv_disabled_store(struct device *dev,
408 struct device_attribute *attr,
409 const char *buf, size_t count)
410{
411 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
412 int rv, value;
413
414 rv = parse_arg(buf, &value);
415 if (rv < 0)
416 return rv;
417
418 switch (value) {
419 case 0:
420 if (eeepc->cpufv_disabled)
421 pr_warn("cpufv enabled (not officially supported on this model)\n");
422 eeepc->cpufv_disabled = false;
423 return count;
424 case 1:
425 return -EPERM;
426 default:
427 return -EINVAL;
428 }
429}
430
431
432static DEVICE_ATTR_RW(cpufv);
433static DEVICE_ATTR_RO(available_cpufv);
434static DEVICE_ATTR_RW(cpufv_disabled);
435
436static struct attribute *platform_attributes[] = {
437 &dev_attr_camera.attr,
438 &dev_attr_cardr.attr,
439 &dev_attr_disp.attr,
440 &dev_attr_cpufv.attr,
441 &dev_attr_available_cpufv.attr,
442 &dev_attr_cpufv_disabled.attr,
443 NULL
444};
445
446static struct attribute_group platform_attribute_group = {
447 .attrs = platform_attributes
448};
449
450static int eeepc_platform_init(struct eeepc_laptop *eeepc)
451{
452 int result;
453
454 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
455 if (!eeepc->platform_device)
456 return -ENOMEM;
457 platform_set_drvdata(eeepc->platform_device, eeepc);
458
459 result = platform_device_add(eeepc->platform_device);
460 if (result)
461 goto fail_platform_device;
462
463 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
464 &platform_attribute_group);
465 if (result)
466 goto fail_sysfs;
467 return 0;
468
469fail_sysfs:
470 platform_device_del(eeepc->platform_device);
471fail_platform_device:
472 platform_device_put(eeepc->platform_device);
473 return result;
474}
475
476static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
477{
478 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
479 &platform_attribute_group);
480 platform_device_unregister(eeepc->platform_device);
481}
482
483/*
484 * LEDs
485 */
486/*
487 * These functions actually update the LED's, and are called from a
488 * workqueue. By doing this as separate work rather than when the LED
489 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
490 * potentially bad time, such as a timer interrupt.
491 */
492static void tpd_led_update(struct work_struct *work)
493 {
494 struct eeepc_laptop *eeepc;
495
496 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
497
498 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
499}
500
501static void tpd_led_set(struct led_classdev *led_cdev,
502 enum led_brightness value)
503{
504 struct eeepc_laptop *eeepc;
505
506 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
507
508 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
509 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
510}
511
512static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
513{
514 struct eeepc_laptop *eeepc;
515
516 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
517
518 return get_acpi(eeepc, CM_ASL_TPD);
519}
520
521static int eeepc_led_init(struct eeepc_laptop *eeepc)
522{
523 int rv;
524
525 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
526 return 0;
527
528 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
529 if (!eeepc->led_workqueue)
530 return -ENOMEM;
531 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
532
533 eeepc->tpd_led.name = "eeepc::touchpad";
534 eeepc->tpd_led.brightness_set = tpd_led_set;
535 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
536 eeepc->tpd_led.brightness_get = tpd_led_get;
537 eeepc->tpd_led.max_brightness = 1;
538
539 rv = led_classdev_register(&eeepc->platform_device->dev,
540 &eeepc->tpd_led);
541 if (rv) {
542 destroy_workqueue(eeepc->led_workqueue);
543 return rv;
544 }
545
546 return 0;
547}
548
549static void eeepc_led_exit(struct eeepc_laptop *eeepc)
550{
551 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
552 led_classdev_unregister(&eeepc->tpd_led);
553 if (eeepc->led_workqueue)
554 destroy_workqueue(eeepc->led_workqueue);
555}
556
557
558/*
559 * PCI hotplug (for wlan rfkill)
560 */
561static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
562{
563 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
564 return false;
565 return true;
566}
567
568static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
569{
570 struct pci_dev *port;
571 struct pci_dev *dev;
572 struct pci_bus *bus;
573 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
574 bool absent;
575 u32 l;
576
577 if (eeepc->wlan_rfkill)
578 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
579
580 mutex_lock(&eeepc->hotplug_lock);
581 pci_lock_rescan_remove();
582
583 if (!eeepc->hotplug_slot)
584 goto out_unlock;
585
586 port = acpi_get_pci_dev(handle);
587 if (!port) {
588 pr_warning("Unable to find port\n");
589 goto out_unlock;
590 }
591
592 bus = port->subordinate;
593
594 if (!bus) {
595 pr_warn("Unable to find PCI bus 1?\n");
596 goto out_put_dev;
597 }
598
599 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
600 pr_err("Unable to read PCI config space?\n");
601 goto out_put_dev;
602 }
603
604 absent = (l == 0xffffffff);
605
606 if (blocked != absent) {
607 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
608 blocked ? "blocked" : "unblocked",
609 absent ? "absent" : "present");
610 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
611 goto out_put_dev;
612 }
613
614 if (!blocked) {
615 dev = pci_get_slot(bus, 0);
616 if (dev) {
617 /* Device already present */
618 pci_dev_put(dev);
619 goto out_put_dev;
620 }
621 dev = pci_scan_single_device(bus, 0);
622 if (dev) {
623 pci_bus_assign_resources(bus);
624 pci_bus_add_device(dev);
625 }
626 } else {
627 dev = pci_get_slot(bus, 0);
628 if (dev) {
629 pci_stop_and_remove_bus_device(dev);
630 pci_dev_put(dev);
631 }
632 }
633out_put_dev:
634 pci_dev_put(port);
635
636out_unlock:
637 pci_unlock_rescan_remove();
638 mutex_unlock(&eeepc->hotplug_lock);
639}
640
641static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
642{
643 acpi_status status = AE_OK;
644 acpi_handle handle;
645
646 status = acpi_get_handle(NULL, node, &handle);
647
648 if (ACPI_SUCCESS(status))
649 eeepc_rfkill_hotplug(eeepc, handle);
650}
651
652static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
653{
654 struct eeepc_laptop *eeepc = data;
655
656 if (event != ACPI_NOTIFY_BUS_CHECK)
657 return;
658
659 eeepc_rfkill_hotplug(eeepc, handle);
660}
661
662static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
663 char *node)
664{
665 acpi_status status;
666 acpi_handle handle;
667
668 status = acpi_get_handle(NULL, node, &handle);
669
670 if (ACPI_FAILURE(status))
671 return -ENODEV;
672
673 status = acpi_install_notify_handler(handle,
674 ACPI_SYSTEM_NOTIFY,
675 eeepc_rfkill_notify,
676 eeepc);
677 if (ACPI_FAILURE(status))
678 pr_warn("Failed to register notify on %s\n", node);
679
680 /*
681 * Refresh pci hotplug in case the rfkill state was
682 * changed during setup.
683 */
684 eeepc_rfkill_hotplug(eeepc, handle);
685 return 0;
686}
687
688static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
689 char *node)
690{
691 acpi_status status = AE_OK;
692 acpi_handle handle;
693
694 status = acpi_get_handle(NULL, node, &handle);
695
696 if (ACPI_FAILURE(status))
697 return;
698
699 status = acpi_remove_notify_handler(handle,
700 ACPI_SYSTEM_NOTIFY,
701 eeepc_rfkill_notify);
702 if (ACPI_FAILURE(status))
703 pr_err("Error removing rfkill notify handler %s\n",
704 node);
705 /*
706 * Refresh pci hotplug in case the rfkill
707 * state was changed after
708 * eeepc_unregister_rfkill_notifier()
709 */
710 eeepc_rfkill_hotplug(eeepc, handle);
711}
712
713static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
714 u8 *value)
715{
716 struct eeepc_laptop *eeepc = hotplug_slot->private;
717 int val = get_acpi(eeepc, CM_ASL_WLAN);
718
719 if (val == 1 || val == 0)
720 *value = val;
721 else
722 return -EINVAL;
723
724 return 0;
725}
726
727static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
728{
729 kfree(hotplug_slot->info);
730 kfree(hotplug_slot);
731}
732
733static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
734 .owner = THIS_MODULE,
735 .get_adapter_status = eeepc_get_adapter_status,
736 .get_power_status = eeepc_get_adapter_status,
737};
738
739static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
740{
741 int ret = -ENOMEM;
742 struct pci_bus *bus = pci_find_bus(0, 1);
743
744 if (!bus) {
745 pr_err("Unable to find wifi PCI bus\n");
746 return -ENODEV;
747 }
748
749 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
750 if (!eeepc->hotplug_slot)
751 goto error_slot;
752
753 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
754 GFP_KERNEL);
755 if (!eeepc->hotplug_slot->info)
756 goto error_info;
757
758 eeepc->hotplug_slot->private = eeepc;
759 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
760 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
761 eeepc_get_adapter_status(eeepc->hotplug_slot,
762 &eeepc->hotplug_slot->info->adapter_status);
763
764 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
765 if (ret) {
766 pr_err("Unable to register hotplug slot - %d\n", ret);
767 goto error_register;
768 }
769
770 return 0;
771
772error_register:
773 kfree(eeepc->hotplug_slot->info);
774error_info:
775 kfree(eeepc->hotplug_slot);
776 eeepc->hotplug_slot = NULL;
777error_slot:
778 return ret;
779}
780
781/*
782 * Rfkill devices
783 */
784static int eeepc_rfkill_set(void *data, bool blocked)
785{
786 acpi_handle handle = data;
787
788 return write_acpi_int(handle, NULL, !blocked);
789}
790
791static const struct rfkill_ops eeepc_rfkill_ops = {
792 .set_block = eeepc_rfkill_set,
793};
794
795static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
796 struct rfkill **rfkill,
797 const char *name,
798 enum rfkill_type type, int cm)
799{
800 acpi_handle handle;
801 int result;
802
803 result = acpi_setter_handle(eeepc, cm, &handle);
804 if (result < 0)
805 return result;
806
807 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
808 &eeepc_rfkill_ops, handle);
809
810 if (!*rfkill)
811 return -EINVAL;
812
813 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
814 result = rfkill_register(*rfkill);
815 if (result) {
816 rfkill_destroy(*rfkill);
817 *rfkill = NULL;
818 return result;
819 }
820 return 0;
821}
822
823static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
824static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
825static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
826
827static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
828{
829 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
830 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
831 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
832 if (eeepc->wlan_rfkill) {
833 rfkill_unregister(eeepc->wlan_rfkill);
834 rfkill_destroy(eeepc->wlan_rfkill);
835 eeepc->wlan_rfkill = NULL;
836 }
837
838 if (eeepc->hotplug_slot)
839 pci_hp_deregister(eeepc->hotplug_slot);
840
841 if (eeepc->bluetooth_rfkill) {
842 rfkill_unregister(eeepc->bluetooth_rfkill);
843 rfkill_destroy(eeepc->bluetooth_rfkill);
844 eeepc->bluetooth_rfkill = NULL;
845 }
846 if (eeepc->wwan3g_rfkill) {
847 rfkill_unregister(eeepc->wwan3g_rfkill);
848 rfkill_destroy(eeepc->wwan3g_rfkill);
849 eeepc->wwan3g_rfkill = NULL;
850 }
851 if (eeepc->wimax_rfkill) {
852 rfkill_unregister(eeepc->wimax_rfkill);
853 rfkill_destroy(eeepc->wimax_rfkill);
854 eeepc->wimax_rfkill = NULL;
855 }
856}
857
858static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
859{
860 int result = 0;
861
862 mutex_init(&eeepc->hotplug_lock);
863
864 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
865 "eeepc-wlan", RFKILL_TYPE_WLAN,
866 CM_ASL_WLAN);
867
868 if (result && result != -ENODEV)
869 goto exit;
870
871 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
872 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
873 CM_ASL_BLUETOOTH);
874
875 if (result && result != -ENODEV)
876 goto exit;
877
878 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
879 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
880 CM_ASL_3G);
881
882 if (result && result != -ENODEV)
883 goto exit;
884
885 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
886 "eeepc-wimax", RFKILL_TYPE_WIMAX,
887 CM_ASL_WIMAX);
888
889 if (result && result != -ENODEV)
890 goto exit;
891
892 if (eeepc->hotplug_disabled)
893 return 0;
894
895 result = eeepc_setup_pci_hotplug(eeepc);
896 /*
897 * If we get -EBUSY then something else is handling the PCI hotplug -
898 * don't fail in this case
899 */
900 if (result == -EBUSY)
901 result = 0;
902
903 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
904 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
905 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
906
907exit:
908 if (result && result != -ENODEV)
909 eeepc_rfkill_exit(eeepc);
910 return result;
911}
912
913/*
914 * Platform driver - hibernate/resume callbacks
915 */
916static int eeepc_hotk_thaw(struct device *device)
917{
918 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
919
920 if (eeepc->wlan_rfkill) {
921 int wlan;
922
923 /*
924 * Work around bios bug - acpi _PTS turns off the wireless led
925 * during suspend. Normally it restores it on resume, but
926 * we should kick it ourselves in case hibernation is aborted.
927 */
928 wlan = get_acpi(eeepc, CM_ASL_WLAN);
929 if (wlan >= 0)
930 set_acpi(eeepc, CM_ASL_WLAN, wlan);
931 }
932
933 return 0;
934}
935
936static int eeepc_hotk_restore(struct device *device)
937{
938 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
939
940 /* Refresh both wlan rfkill state and pci hotplug */
941 if (eeepc->wlan_rfkill) {
942 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
943 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
944 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
945 }
946
947 if (eeepc->bluetooth_rfkill)
948 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
949 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
950 if (eeepc->wwan3g_rfkill)
951 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
952 get_acpi(eeepc, CM_ASL_3G) != 1);
953 if (eeepc->wimax_rfkill)
954 rfkill_set_sw_state(eeepc->wimax_rfkill,
955 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
956
957 return 0;
958}
959
960static const struct dev_pm_ops eeepc_pm_ops = {
961 .thaw = eeepc_hotk_thaw,
962 .restore = eeepc_hotk_restore,
963};
964
965static struct platform_driver platform_driver = {
966 .driver = {
967 .name = EEEPC_LAPTOP_FILE,
968 .pm = &eeepc_pm_ops,
969 }
970};
971
972/*
973 * Hwmon device
974 */
975
976#define EEEPC_EC_SC00 0x61
977#define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
978#define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
979#define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
980
981#define EEEPC_EC_SFB0 0xD0
982#define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
983
984static inline int eeepc_pwm_to_lmsensors(int value)
985{
986 return value * 255 / 100;
987}
988
989static inline int eeepc_lmsensors_to_pwm(int value)
990{
991 value = clamp_val(value, 0, 255);
992 return value * 100 / 255;
993}
994
995static int eeepc_get_fan_pwm(void)
996{
997 u8 value = 0;
998
999 ec_read(EEEPC_EC_FAN_PWM, &value);
1000 return eeepc_pwm_to_lmsensors(value);
1001}
1002
1003static void eeepc_set_fan_pwm(int value)
1004{
1005 value = eeepc_lmsensors_to_pwm(value);
1006 ec_write(EEEPC_EC_FAN_PWM, value);
1007}
1008
1009static int eeepc_get_fan_rpm(void)
1010{
1011 u8 high = 0;
1012 u8 low = 0;
1013
1014 ec_read(EEEPC_EC_FAN_HRPM, &high);
1015 ec_read(EEEPC_EC_FAN_LRPM, &low);
1016 return high << 8 | low;
1017}
1018
1019#define EEEPC_EC_FAN_CTRL_BIT 0x02
1020#define EEEPC_FAN_CTRL_MANUAL 1
1021#define EEEPC_FAN_CTRL_AUTO 2
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 & EEEPC_EC_FAN_CTRL_BIT)
1029 return EEEPC_FAN_CTRL_MANUAL;
1030 else
1031 return EEEPC_FAN_CTRL_AUTO;
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 == EEEPC_FAN_CTRL_MANUAL)
1040 value |= EEEPC_EC_FAN_CTRL_BIT;
1041 else
1042 value &= ~EEEPC_EC_FAN_CTRL_BIT;
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, &value);
1051 if (rv < 0)
1052 return rv;
1053 set(value);
1054 return count;
1055}
1056
1057static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1058{
1059 return sprintf(buf, "%d\n", get());
1060}
1061
1062#define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1063 static ssize_t _name##_show(struct device *dev, \
1064 struct device_attribute *attr, \
1065 char *buf) \
1066 { \
1067 return show_sys_hwmon(_get, buf); \
1068 }
1069
1070#define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1071 static ssize_t _name##_store(struct device *dev, \
1072 struct device_attribute *attr, \
1073 const char *buf, size_t count) \
1074 { \
1075 return store_sys_hwmon(_set, buf, count); \
1076 }
1077
1078#define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1079 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1080 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1081 static DEVICE_ATTR_RW(_name)
1082
1083#define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1084 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1085 static DEVICE_ATTR_RO(_name)
1086
1087EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1088EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1089 eeepc_set_fan_pwm);
1090EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1091 eeepc_set_fan_ctrl);
1092
1093static struct attribute *hwmon_attrs[] = {
1094 &dev_attr_pwm1.attr,
1095 &dev_attr_fan1_input.attr,
1096 &dev_attr_pwm1_enable.attr,
1097 NULL
1098};
1099ATTRIBUTE_GROUPS(hwmon);
1100
1101static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1102{
1103 struct device *dev = &eeepc->platform_device->dev;
1104 struct device *hwmon;
1105
1106 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1107 hwmon_groups);
1108 if (IS_ERR(hwmon)) {
1109 pr_err("Could not register eeepc hwmon device\n");
1110 return PTR_ERR(hwmon);
1111 }
1112 return 0;
1113}
1114
1115/*
1116 * Backlight device
1117 */
1118static int read_brightness(struct backlight_device *bd)
1119{
1120 struct eeepc_laptop *eeepc = bl_get_data(bd);
1121
1122 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1123}
1124
1125static int set_brightness(struct backlight_device *bd, int value)
1126{
1127 struct eeepc_laptop *eeepc = bl_get_data(bd);
1128
1129 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1130}
1131
1132static int update_bl_status(struct backlight_device *bd)
1133{
1134 return set_brightness(bd, bd->props.brightness);
1135}
1136
1137static const struct backlight_ops eeepcbl_ops = {
1138 .get_brightness = read_brightness,
1139 .update_status = update_bl_status,
1140};
1141
1142static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1143{
1144 struct backlight_device *bd = eeepc->backlight_device;
1145 int old = bd->props.brightness;
1146
1147 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1148
1149 return old;
1150}
1151
1152static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1153{
1154 struct backlight_properties props;
1155 struct backlight_device *bd;
1156
1157 memset(&props, 0, sizeof(struct backlight_properties));
1158 props.type = BACKLIGHT_PLATFORM;
1159 props.max_brightness = 15;
1160 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1161 &eeepc->platform_device->dev, eeepc,
1162 &eeepcbl_ops, &props);
1163 if (IS_ERR(bd)) {
1164 pr_err("Could not register eeepc backlight device\n");
1165 eeepc->backlight_device = NULL;
1166 return PTR_ERR(bd);
1167 }
1168 eeepc->backlight_device = bd;
1169 bd->props.brightness = read_brightness(bd);
1170 bd->props.power = FB_BLANK_UNBLANK;
1171 backlight_update_status(bd);
1172 return 0;
1173}
1174
1175static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1176{
1177 backlight_device_unregister(eeepc->backlight_device);
1178 eeepc->backlight_device = NULL;
1179}
1180
1181
1182/*
1183 * Input device (i.e. hotkeys)
1184 */
1185static int eeepc_input_init(struct eeepc_laptop *eeepc)
1186{
1187 struct input_dev *input;
1188 int error;
1189
1190 input = input_allocate_device();
1191 if (!input)
1192 return -ENOMEM;
1193
1194 input->name = "Asus EeePC extra buttons";
1195 input->phys = EEEPC_LAPTOP_FILE "/input0";
1196 input->id.bustype = BUS_HOST;
1197 input->dev.parent = &eeepc->platform_device->dev;
1198
1199 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1200 if (error) {
1201 pr_err("Unable to setup input device keymap\n");
1202 goto err_free_dev;
1203 }
1204
1205 error = input_register_device(input);
1206 if (error) {
1207 pr_err("Unable to register input device\n");
1208 goto err_free_keymap;
1209 }
1210
1211 eeepc->inputdev = input;
1212 return 0;
1213
1214err_free_keymap:
1215 sparse_keymap_free(input);
1216err_free_dev:
1217 input_free_device(input);
1218 return error;
1219}
1220
1221static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1222{
1223 if (eeepc->inputdev) {
1224 sparse_keymap_free(eeepc->inputdev);
1225 input_unregister_device(eeepc->inputdev);
1226 }
1227 eeepc->inputdev = NULL;
1228}
1229
1230/*
1231 * ACPI driver
1232 */
1233static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1234{
1235 if (!eeepc->inputdev)
1236 return;
1237 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1238 pr_info("Unknown key %x pressed\n", event);
1239}
1240
1241static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1242{
1243 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1244 int old_brightness, new_brightness;
1245 u16 count;
1246
1247 if (event > ACPI_MAX_SYS_NOTIFY)
1248 return;
1249 count = eeepc->event_count[event % 128]++;
1250 acpi_bus_generate_netlink_event(device->pnp.device_class,
1251 dev_name(&device->dev), event,
1252 count);
1253
1254 /* Brightness events are special */
1255 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1256 eeepc_input_notify(eeepc, event);
1257 return;
1258 }
1259
1260 /* Ignore them completely if the acpi video driver is used */
1261 if (!eeepc->backlight_device)
1262 return;
1263
1264 /* Update the backlight device. */
1265 old_brightness = eeepc_backlight_notify(eeepc);
1266
1267 /* Convert event to keypress (obsolescent hack) */
1268 new_brightness = event - NOTIFY_BRN_MIN;
1269
1270 if (new_brightness < old_brightness) {
1271 event = NOTIFY_BRN_MIN; /* brightness down */
1272 } else if (new_brightness > old_brightness) {
1273 event = NOTIFY_BRN_MAX; /* brightness up */
1274 } else {
1275 /*
1276 * no change in brightness - already at min/max,
1277 * event will be desired value (or else ignored)
1278 */
1279 }
1280 eeepc_input_notify(eeepc, event);
1281}
1282
1283static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1284{
1285 const char *model;
1286
1287 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1288 if (!model)
1289 return;
1290
1291 /*
1292 * Blacklist for setting cpufv (cpu speed).
1293 *
1294 * EeePC 4G ("701") implements CFVS, but it is not supported
1295 * by the pre-installed OS, and the original option to change it
1296 * in the BIOS setup screen was removed in later versions.
1297 *
1298 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1299 * this applies to all "701" models (4G/4G Surf/2G Surf).
1300 *
1301 * So Asus made a deliberate decision not to support it on this model.
1302 * We have several reports that using it can cause the system to hang
1303 *
1304 * The hang has also been reported on a "702" (Model name "8G"?).
1305 *
1306 * We avoid dmi_check_system() / dmi_match(), because they use
1307 * substring matching. We don't want to affect the "701SD"
1308 * and "701SDX" models, because they do support S.H.E.
1309 */
1310 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1311 eeepc->cpufv_disabled = true;
1312 pr_info("model %s does not officially support setting cpu speed\n",
1313 model);
1314 pr_info("cpufv disabled to avoid instability\n");
1315 }
1316
1317 /*
1318 * Blacklist for wlan hotplug
1319 *
1320 * Eeepc 1005HA doesn't work like others models and don't need the
1321 * hotplug code. In fact, current hotplug code seems to unplug another
1322 * device...
1323 */
1324 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1325 strcmp(model, "1005PE") == 0) {
1326 eeepc->hotplug_disabled = true;
1327 pr_info("wlan hotplug disabled\n");
1328 }
1329}
1330
1331static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1332{
1333 int dummy;
1334
1335 /* Some BIOSes do not report cm although it is available.
1336 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1337 if (!(eeepc->cm_supported & (1 << cm))
1338 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1339 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1340 name, 1 << cm);
1341 eeepc->cm_supported |= 1 << cm;
1342 }
1343}
1344
1345static void cmsg_quirks(struct eeepc_laptop *eeepc)
1346{
1347 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1348 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1349 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1350 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1351}
1352
1353static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1354{
1355 unsigned int init_flags;
1356 int result;
1357
1358 result = acpi_bus_get_status(eeepc->device);
1359 if (result)
1360 return result;
1361 if (!eeepc->device->status.present) {
1362 pr_err("Hotkey device not present, aborting\n");
1363 return -ENODEV;
1364 }
1365
1366 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1367 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1368
1369 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1370 pr_err("Hotkey initialization failed\n");
1371 return -ENODEV;
1372 }
1373
1374 /* get control methods supported */
1375 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1376 pr_err("Get control methods supported failed\n");
1377 return -ENODEV;
1378 }
1379 cmsg_quirks(eeepc);
1380 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1381
1382 return 0;
1383}
1384
1385static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1386{
1387 /*
1388 * If the following call to set_acpi() fails, it's because there's no
1389 * camera so we can ignore the error.
1390 */
1391 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1392 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1393}
1394
1395static bool eeepc_device_present;
1396
1397static int eeepc_acpi_add(struct acpi_device *device)
1398{
1399 struct eeepc_laptop *eeepc;
1400 int result;
1401
1402 pr_notice(EEEPC_LAPTOP_NAME "\n");
1403 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1404 if (!eeepc)
1405 return -ENOMEM;
1406 eeepc->handle = device->handle;
1407 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1408 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1409 device->driver_data = eeepc;
1410 eeepc->device = device;
1411
1412 eeepc->hotplug_disabled = hotplug_disabled;
1413
1414 eeepc_dmi_check(eeepc);
1415
1416 result = eeepc_acpi_init(eeepc);
1417 if (result)
1418 goto fail_platform;
1419 eeepc_enable_camera(eeepc);
1420
1421 /*
1422 * Register the platform device first. It is used as a parent for the
1423 * sub-devices below.
1424 *
1425 * Note that if there are multiple instances of this ACPI device it
1426 * will bail out, because the platform device is registered with a
1427 * fixed name. Of course it doesn't make sense to have more than one,
1428 * and machine-specific scripts find the fixed name convenient. But
1429 * It's also good for us to exclude multiple instances because both
1430 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1431 * (the EC and the wlan PCI slot respectively).
1432 */
1433 result = eeepc_platform_init(eeepc);
1434 if (result)
1435 goto fail_platform;
1436
1437 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1438 result = eeepc_backlight_init(eeepc);
1439 if (result)
1440 goto fail_backlight;
1441 }
1442
1443 result = eeepc_input_init(eeepc);
1444 if (result)
1445 goto fail_input;
1446
1447 result = eeepc_hwmon_init(eeepc);
1448 if (result)
1449 goto fail_hwmon;
1450
1451 result = eeepc_led_init(eeepc);
1452 if (result)
1453 goto fail_led;
1454
1455 result = eeepc_rfkill_init(eeepc);
1456 if (result)
1457 goto fail_rfkill;
1458
1459 eeepc_device_present = true;
1460 return 0;
1461
1462fail_rfkill:
1463 eeepc_led_exit(eeepc);
1464fail_led:
1465fail_hwmon:
1466 eeepc_input_exit(eeepc);
1467fail_input:
1468 eeepc_backlight_exit(eeepc);
1469fail_backlight:
1470 eeepc_platform_exit(eeepc);
1471fail_platform:
1472 kfree(eeepc);
1473
1474 return result;
1475}
1476
1477static int eeepc_acpi_remove(struct acpi_device *device)
1478{
1479 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1480
1481 eeepc_backlight_exit(eeepc);
1482 eeepc_rfkill_exit(eeepc);
1483 eeepc_input_exit(eeepc);
1484 eeepc_led_exit(eeepc);
1485 eeepc_platform_exit(eeepc);
1486
1487 kfree(eeepc);
1488 return 0;
1489}
1490
1491
1492static const struct acpi_device_id eeepc_device_ids[] = {
1493 {EEEPC_ACPI_HID, 0},
1494 {"", 0},
1495};
1496MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1497
1498static struct acpi_driver eeepc_acpi_driver = {
1499 .name = EEEPC_LAPTOP_NAME,
1500 .class = EEEPC_ACPI_CLASS,
1501 .owner = THIS_MODULE,
1502 .ids = eeepc_device_ids,
1503 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1504 .ops = {
1505 .add = eeepc_acpi_add,
1506 .remove = eeepc_acpi_remove,
1507 .notify = eeepc_acpi_notify,
1508 },
1509};
1510
1511
1512static int __init eeepc_laptop_init(void)
1513{
1514 int result;
1515
1516 result = platform_driver_register(&platform_driver);
1517 if (result < 0)
1518 return result;
1519
1520 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1521 if (result < 0)
1522 goto fail_acpi_driver;
1523
1524 if (!eeepc_device_present) {
1525 result = -ENODEV;
1526 goto fail_no_device;
1527 }
1528
1529 return 0;
1530
1531fail_no_device:
1532 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1533fail_acpi_driver:
1534 platform_driver_unregister(&platform_driver);
1535 return result;
1536}
1537
1538static void __exit eeepc_laptop_exit(void)
1539{
1540 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1541 platform_driver_unregister(&platform_driver);
1542}
1543
1544module_init(eeepc_laptop_init);
1545module_exit(eeepc_laptop_exit);