2 * eepc-laptop.c - Asus Eee PC extras
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
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.
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.
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/types.h>
23 #include <linux/platform_device.h>
24 #include <linux/backlight.h>
26 #include <linux/hwmon.h>
27 #include <linux/hwmon-sysfs.h>
28 #include <acpi/acpi_drivers.h>
29 #include <acpi/acpi_bus.h>
30 #include <linux/uaccess.h>
31 #include <linux/input.h>
32 #include <linux/rfkill.h>
34 #define EEEPC_LAPTOP_VERSION "0.1"
36 #define EEEPC_HOTK_NAME "Eee PC Hotkey Driver"
37 #define EEEPC_HOTK_FILE "eeepc"
38 #define EEEPC_HOTK_CLASS "hotkey"
39 #define EEEPC_HOTK_DEVICE_NAME "Hotkey"
40 #define EEEPC_HOTK_HID "ASUS010"
42 #define EEEPC_LOG EEEPC_HOTK_FILE ": "
43 #define EEEPC_ERR KERN_ERR EEEPC_LOG
44 #define EEEPC_WARNING KERN_WARNING EEEPC_LOG
45 #define EEEPC_NOTICE KERN_NOTICE EEEPC_LOG
46 #define EEEPC_INFO KERN_INFO EEEPC_LOG
49 * Definitions for Asus EeePC
51 #define NOTIFY_WLAN_ON 0x10
52 #define NOTIFY_BRN_MIN 0x20
53 #define NOTIFY_BRN_MAX 0x2f
56 DISABLE_ASL_WLAN = 0x0001,
57 DISABLE_ASL_BLUETOOTH = 0x0002,
58 DISABLE_ASL_IRDA = 0x0004,
59 DISABLE_ASL_CAMERA = 0x0008,
60 DISABLE_ASL_TV = 0x0010,
61 DISABLE_ASL_GPS = 0x0020,
62 DISABLE_ASL_DISPLAYSWITCH = 0x0040,
63 DISABLE_ASL_MODEM = 0x0080,
64 DISABLE_ASL_CARDREADER = 0x0100
81 CM_ASL_CPUTEMPERATURE,
92 static const char *cm_getv[] = {
93 "WLDG", "BTHG", NULL, NULL,
94 "CAMG", NULL, NULL, NULL,
95 NULL, "PBLG", NULL, NULL,
96 "CFVG", NULL, NULL, NULL,
97 "USBG", NULL, NULL, "MODG",
101 static const char *cm_setv[] = {
102 "WLDS", "BTHS", NULL, NULL,
103 "CAMS", NULL, NULL, NULL,
104 "SDSP", "PBLS", "HDPS", NULL,
105 "CFVS", NULL, NULL, NULL,
106 "USBG", NULL, NULL, "MODS",
110 #define EEEPC_EC "\\_SB.PCI0.SBRG.EC0."
112 #define EEEPC_EC_FAN_PWM EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */
113 #define EEEPC_EC_SC02 0x63
114 #define EEEPC_EC_FAN_HRPM EEEPC_EC "SC05" /* High byte, fan speed (RPM) */
115 #define EEEPC_EC_FAN_LRPM EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */
116 #define EEEPC_EC_FAN_CTRL EEEPC_EC "SFB3" /* Byte containing SF25 */
117 #define EEEPC_EC_SFB3 0xD3
120 * This is the main structure, we can use it to store useful information
121 * about the hotk device
124 struct acpi_device *device; /* the device we are in */
125 acpi_handle handle; /* the handle of the hotk device */
126 u32 cm_supported; /* the control methods supported
128 uint init_flag; /* Init flags */
129 u16 event_count[128]; /* count for each event */
130 struct input_dev *inputdev;
132 struct rfkill *eeepc_wlan_rfkill;
133 struct rfkill *eeepc_bluetooth_rfkill;
136 /* The actual device the driver binds to */
137 static struct eeepc_hotk *ehotk;
139 /* Platform device/driver */
140 static struct platform_driver platform_driver = {
142 .name = EEEPC_HOTK_FILE,
143 .owner = THIS_MODULE,
147 static struct platform_device *platform_device;
155 enum { KE_KEY, KE_END };
157 static struct key_entry eeepc_keymap[] = {
158 /* Sleep already handled via generic ACPI code */
159 {KE_KEY, 0x10, KEY_WLAN },
160 {KE_KEY, 0x12, KEY_PROG1 },
161 {KE_KEY, 0x13, KEY_MUTE },
162 {KE_KEY, 0x14, KEY_VOLUMEDOWN },
163 {KE_KEY, 0x15, KEY_VOLUMEUP },
164 {KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
165 {KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
166 {KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
171 * The hotkey driver declaration
173 static int eeepc_hotk_add(struct acpi_device *device);
174 static int eeepc_hotk_remove(struct acpi_device *device, int type);
176 static const struct acpi_device_id eeepc_device_ids[] = {
180 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
182 static struct acpi_driver eeepc_hotk_driver = {
183 .name = EEEPC_HOTK_NAME,
184 .class = EEEPC_HOTK_CLASS,
185 .ids = eeepc_device_ids,
187 .add = eeepc_hotk_add,
188 .remove = eeepc_hotk_remove,
192 /* The backlight device /sys/class/backlight */
193 static struct backlight_device *eeepc_backlight_device;
195 /* The hwmon device */
196 static struct device *eeepc_hwmon_device;
199 * The backlight class declaration
201 static int read_brightness(struct backlight_device *bd);
202 static int update_bl_status(struct backlight_device *bd);
203 static struct backlight_ops eeepcbl_ops = {
204 .get_brightness = read_brightness,
205 .update_status = update_bl_status,
208 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
209 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
210 MODULE_LICENSE("GPL");
215 static int write_acpi_int(acpi_handle handle, const char *method, int val,
216 struct acpi_buffer *output)
218 struct acpi_object_list params;
219 union acpi_object in_obj;
223 params.pointer = &in_obj;
224 in_obj.type = ACPI_TYPE_INTEGER;
225 in_obj.integer.value = val;
227 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
228 return (status == AE_OK ? 0 : -1);
231 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
234 unsigned long long result;
236 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
237 if (ACPI_FAILURE(status)) {
246 static int set_acpi(int cm, int value)
248 if (ehotk->cm_supported & (0x1 << cm)) {
249 const char *method = cm_setv[cm];
252 if (write_acpi_int(ehotk->handle, method, value, NULL))
253 printk(EEEPC_WARNING "Error writing %s\n", method);
258 static int get_acpi(int cm)
261 if ((ehotk->cm_supported & (0x1 << cm))) {
262 const char *method = cm_getv[cm];
265 if (read_acpi_int(ehotk->handle, method, &value))
266 printk(EEEPC_WARNING "Error reading %s\n", method);
274 static int read_brightness(struct backlight_device *bd)
276 return get_acpi(CM_ASL_PANELBRIGHT);
279 static int set_brightness(struct backlight_device *bd, int value)
281 value = max(0, min(15, value));
282 return set_acpi(CM_ASL_PANELBRIGHT, value);
285 static int update_bl_status(struct backlight_device *bd)
287 return set_brightness(bd, bd->props.brightness);
294 static int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
296 if (state == RFKILL_STATE_SOFT_BLOCKED)
297 return set_acpi(CM_ASL_WLAN, 0);
299 return set_acpi(CM_ASL_WLAN, 1);
302 static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
304 if (get_acpi(CM_ASL_WLAN) == 1)
305 *state = RFKILL_STATE_UNBLOCKED;
307 *state = RFKILL_STATE_SOFT_BLOCKED;
311 static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
313 if (state == RFKILL_STATE_SOFT_BLOCKED)
314 return set_acpi(CM_ASL_BLUETOOTH, 0);
316 return set_acpi(CM_ASL_BLUETOOTH, 1);
319 static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
321 if (get_acpi(CM_ASL_BLUETOOTH) == 1)
322 *state = RFKILL_STATE_UNBLOCKED;
324 *state = RFKILL_STATE_SOFT_BLOCKED;
331 static int parse_arg(const char *buf, unsigned long count, int *val)
335 if (sscanf(buf, "%i", val) != 1)
340 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
344 rv = parse_arg(buf, count, &value);
350 static ssize_t show_sys_acpi(int cm, char *buf)
352 return sprintf(buf, "%d\n", get_acpi(cm));
355 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm) \
356 static ssize_t show_##_name(struct device *dev, \
357 struct device_attribute *attr, \
360 return show_sys_acpi(_cm, buf); \
362 static ssize_t store_##_name(struct device *dev, \
363 struct device_attribute *attr, \
364 const char *buf, size_t count) \
366 return store_sys_acpi(_cm, buf, count); \
368 static struct device_attribute dev_attr_##_name = { \
370 .name = __stringify(_name), \
372 .show = show_##_name, \
373 .store = store_##_name, \
376 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
377 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
378 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
380 static struct attribute *platform_attributes[] = {
381 &dev_attr_camera.attr,
382 &dev_attr_cardr.attr,
387 static struct attribute_group platform_attribute_group = {
388 .attrs = platform_attributes
394 static struct key_entry *eepc_get_entry_by_scancode(int code)
396 struct key_entry *key;
398 for (key = eeepc_keymap; key->type != KE_END; key++)
399 if (code == key->code)
405 static struct key_entry *eepc_get_entry_by_keycode(int code)
407 struct key_entry *key;
409 for (key = eeepc_keymap; key->type != KE_END; key++)
410 if (code == key->keycode && key->type == KE_KEY)
416 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
418 struct key_entry *key = eepc_get_entry_by_scancode(scancode);
420 if (key && key->type == KE_KEY) {
421 *keycode = key->keycode;
428 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
430 struct key_entry *key;
433 if (keycode < 0 || keycode > KEY_MAX)
436 key = eepc_get_entry_by_scancode(scancode);
437 if (key && key->type == KE_KEY) {
438 old_keycode = key->keycode;
439 key->keycode = keycode;
440 set_bit(keycode, dev->keybit);
441 if (!eepc_get_entry_by_keycode(old_keycode))
442 clear_bit(old_keycode, dev->keybit);
449 static int eeepc_hotk_check(void)
451 const struct key_entry *key;
452 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
455 result = acpi_bus_get_status(ehotk->device);
458 if (ehotk->device->status.present) {
459 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
461 printk(EEEPC_ERR "Hotkey initialization failed\n");
464 printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
467 /* get control methods supported */
468 if (read_acpi_int(ehotk->handle, "CMSG"
469 , &ehotk->cm_supported)) {
471 "Get control methods supported failed\n");
475 "Get control methods supported: 0x%x\n",
476 ehotk->cm_supported);
478 ehotk->inputdev = input_allocate_device();
479 if (!ehotk->inputdev) {
480 printk(EEEPC_INFO "Unable to allocate input device\n");
483 ehotk->inputdev->name = "Asus EeePC extra buttons";
484 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
485 ehotk->inputdev->id.bustype = BUS_HOST;
486 ehotk->inputdev->getkeycode = eeepc_getkeycode;
487 ehotk->inputdev->setkeycode = eeepc_setkeycode;
489 for (key = eeepc_keymap; key->type != KE_END; key++) {
492 set_bit(EV_KEY, ehotk->inputdev->evbit);
493 set_bit(key->keycode, ehotk->inputdev->keybit);
497 result = input_register_device(ehotk->inputdev);
499 printk(EEEPC_INFO "Unable to register input device\n");
500 input_free_device(ehotk->inputdev);
504 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
510 static void notify_brn(void)
512 struct backlight_device *bd = eeepc_backlight_device;
514 bd->props.brightness = read_brightness(bd);
517 static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
519 static struct key_entry *key;
522 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
524 acpi_bus_generate_proc_event(ehotk->device, event,
525 ehotk->event_count[event % 128]++);
526 if (ehotk->inputdev) {
527 key = eepc_get_entry_by_scancode(event);
531 input_report_key(ehotk->inputdev, key->keycode,
533 input_sync(ehotk->inputdev);
534 input_report_key(ehotk->inputdev, key->keycode,
536 input_sync(ehotk->inputdev);
543 static int eeepc_hotk_add(struct acpi_device *device)
545 acpi_status status = AE_OK;
550 printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
551 ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
554 ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
555 ehotk->handle = device->handle;
556 strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
557 strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
558 device->driver_data = ehotk;
559 ehotk->device = device;
560 result = eeepc_hotk_check();
563 status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
564 eeepc_hotk_notify, ehotk);
565 if (ACPI_FAILURE(status))
566 printk(EEEPC_ERR "Error installing notify handler\n");
568 if (get_acpi(CM_ASL_WLAN) != -1) {
569 ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
572 if (!ehotk->eeepc_wlan_rfkill)
575 ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
576 ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
577 ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
578 if (get_acpi(CM_ASL_WLAN) == 1)
579 ehotk->eeepc_wlan_rfkill->state =
580 RFKILL_STATE_UNBLOCKED;
582 ehotk->eeepc_wlan_rfkill->state =
583 RFKILL_STATE_SOFT_BLOCKED;
584 rfkill_register(ehotk->eeepc_wlan_rfkill);
587 if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
588 ehotk->eeepc_bluetooth_rfkill =
589 rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);
591 if (!ehotk->eeepc_bluetooth_rfkill)
594 ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
595 ehotk->eeepc_bluetooth_rfkill->toggle_radio =
596 eeepc_bluetooth_rfkill_set;
597 ehotk->eeepc_bluetooth_rfkill->get_state =
598 eeepc_bluetooth_rfkill_state;
599 if (get_acpi(CM_ASL_BLUETOOTH) == 1)
600 ehotk->eeepc_bluetooth_rfkill->state =
601 RFKILL_STATE_UNBLOCKED;
603 ehotk->eeepc_bluetooth_rfkill->state =
604 RFKILL_STATE_SOFT_BLOCKED;
605 rfkill_register(ehotk->eeepc_bluetooth_rfkill);
616 static int eeepc_hotk_remove(struct acpi_device *device, int type)
618 acpi_status status = 0;
620 if (!device || !acpi_driver_data(device))
622 status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
624 if (ACPI_FAILURE(status))
625 printk(EEEPC_ERR "Error removing notify handler\n");
633 static int eeepc_get_fan_pwm(void)
637 read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
638 value = value * 255 / 100;
642 static void eeepc_set_fan_pwm(int value)
644 value = SENSORS_LIMIT(value, 0, 255);
645 value = value * 100 / 255;
646 ec_write(EEEPC_EC_SC02, value);
649 static int eeepc_get_fan_rpm(void)
654 read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
655 read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
656 return (high << 8 | low);
659 static int eeepc_get_fan_ctrl(void)
663 read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
664 return ((value & 0x02 ? 1 : 0));
667 static void eeepc_set_fan_ctrl(int manual)
671 read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
676 ec_write(EEEPC_EC_SFB3, value);
679 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
683 rv = parse_arg(buf, count, &value);
689 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
691 return sprintf(buf, "%d\n", get());
694 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
695 static ssize_t show_##_name(struct device *dev, \
696 struct device_attribute *attr, \
699 return show_sys_hwmon(_set, buf); \
701 static ssize_t store_##_name(struct device *dev, \
702 struct device_attribute *attr, \
703 const char *buf, size_t count) \
705 return store_sys_hwmon(_get, buf, count); \
707 static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
709 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
710 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
711 eeepc_get_fan_pwm, eeepc_set_fan_pwm);
712 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
713 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
716 show_name(struct device *dev, struct device_attribute *attr, char *buf)
718 return sprintf(buf, "eeepc\n");
720 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
722 static struct attribute *hwmon_attributes[] = {
723 &sensor_dev_attr_pwm1.dev_attr.attr,
724 &sensor_dev_attr_fan1_input.dev_attr.attr,
725 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
726 &sensor_dev_attr_name.dev_attr.attr,
730 static struct attribute_group hwmon_attribute_group = {
731 .attrs = hwmon_attributes
737 static void eeepc_backlight_exit(void)
739 if (eeepc_backlight_device)
740 backlight_device_unregister(eeepc_backlight_device);
742 input_unregister_device(ehotk->inputdev);
743 if (ehotk->eeepc_wlan_rfkill)
744 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
745 if (ehotk->eeepc_bluetooth_rfkill)
746 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
747 eeepc_backlight_device = NULL;
750 static void eeepc_hwmon_exit(void)
752 struct device *hwmon;
754 hwmon = eeepc_hwmon_device;
757 sysfs_remove_group(&hwmon->kobj,
758 &hwmon_attribute_group);
759 hwmon_device_unregister(hwmon);
760 eeepc_hwmon_device = NULL;
763 static void __exit eeepc_laptop_exit(void)
765 eeepc_backlight_exit();
767 acpi_bus_unregister_driver(&eeepc_hotk_driver);
768 sysfs_remove_group(&platform_device->dev.kobj,
769 &platform_attribute_group);
770 platform_device_unregister(platform_device);
771 platform_driver_unregister(&platform_driver);
774 static int eeepc_backlight_init(struct device *dev)
776 struct backlight_device *bd;
778 bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
782 "Could not register eeepc backlight device\n");
783 eeepc_backlight_device = NULL;
786 eeepc_backlight_device = bd;
787 bd->props.max_brightness = 15;
788 bd->props.brightness = read_brightness(NULL);
789 bd->props.power = FB_BLANK_UNBLANK;
790 backlight_update_status(bd);
794 static int eeepc_hwmon_init(struct device *dev)
796 struct device *hwmon;
799 hwmon = hwmon_device_register(dev);
802 "Could not register eeepc hwmon device\n");
803 eeepc_hwmon_device = NULL;
804 return PTR_ERR(hwmon);
806 eeepc_hwmon_device = hwmon;
807 result = sysfs_create_group(&hwmon->kobj,
808 &hwmon_attribute_group);
814 static int __init eeepc_laptop_init(void)
821 result = acpi_bus_register_driver(&eeepc_hotk_driver);
825 acpi_bus_unregister_driver(&eeepc_hotk_driver);
828 dev = acpi_get_physical_device(ehotk->device->handle);
830 if (!acpi_video_backlight_support()) {
831 result = eeepc_backlight_init(dev);
835 printk(EEEPC_INFO "Backlight controlled by ACPI video "
838 result = eeepc_hwmon_init(dev);
841 /* Register platform stuff */
842 result = platform_driver_register(&platform_driver);
844 goto fail_platform_driver;
845 platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
846 if (!platform_device) {
848 goto fail_platform_device1;
850 result = platform_device_add(platform_device);
852 goto fail_platform_device2;
853 result = sysfs_create_group(&platform_device->dev.kobj,
854 &platform_attribute_group);
859 platform_device_del(platform_device);
860 fail_platform_device2:
861 platform_device_put(platform_device);
862 fail_platform_device1:
863 platform_driver_unregister(&platform_driver);
864 fail_platform_driver:
867 eeepc_backlight_exit();
872 module_init(eeepc_laptop_init);
873 module_exit(eeepc_laptop_exit);