2 * eeepc-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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
28 #include <linux/hwmon.h>
29 #include <linux/hwmon-sysfs.h>
30 #include <linux/slab.h>
31 #include <acpi/acpi_drivers.h>
32 #include <acpi/acpi_bus.h>
33 #include <linux/uaccess.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/rfkill.h>
37 #include <linux/pci.h>
38 #include <linux/pci_hotplug.h>
39 #include <linux/leds.h>
40 #include <linux/dmi.h>
42 #define EEEPC_LAPTOP_VERSION "0.1"
43 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
44 #define EEEPC_LAPTOP_FILE "eeepc"
46 #define EEEPC_ACPI_CLASS "hotkey"
47 #define EEEPC_ACPI_DEVICE_NAME "Hotkey"
48 #define EEEPC_ACPI_HID "ASUS010"
50 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
51 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
52 MODULE_LICENSE("GPL");
54 static bool hotplug_disabled;
56 module_param(hotplug_disabled, bool, 0444);
57 MODULE_PARM_DESC(hotplug_disabled,
58 "Disable hotplug for wireless device. "
59 "If your laptop need that, please report to "
60 "acpi4asus-user@lists.sourceforge.net.");
63 * Definitions for Asus EeePC
65 #define NOTIFY_BRN_MIN 0x20
66 #define NOTIFY_BRN_MAX 0x2f
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
97 CM_ASL_CPUTEMPERATURE,
110 CM_ASL_PANELPOWER, /*P901*/
114 static const char *cm_getv[] = {
115 "WLDG", "BTHG", NULL, NULL,
116 "CAMG", NULL, NULL, NULL,
117 NULL, "PBLG", NULL, NULL,
118 "CFVG", NULL, NULL, NULL,
119 "USBG", NULL, NULL, "MODG",
120 "CRDG", "M3GG", "WIMG", "HWCF",
121 "LIDG", "TYPE", "PBPG", "TPDG"
124 static const char *cm_setv[] = {
125 "WLDS", "BTHS", NULL, NULL,
126 "CAMS", NULL, NULL, NULL,
127 "SDSP", "PBLS", "HDPS", NULL,
128 "CFVS", NULL, NULL, NULL,
129 "USBG", NULL, NULL, "MODS",
130 "CRDS", "M3GS", "WIMS", NULL,
131 NULL, NULL, "PBPS", "TPDS"
134 static const struct key_entry eeepc_keymap[] = {
135 { KE_KEY, 0x10, { KEY_WLAN } },
136 { KE_KEY, 0x11, { KEY_WLAN } },
137 { KE_KEY, 0x12, { KEY_PROG1 } },
138 { KE_KEY, 0x13, { KEY_MUTE } },
139 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
140 { KE_KEY, 0x15, { KEY_VOLUMEUP } },
141 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
142 { KE_KEY, 0x1a, { KEY_COFFEE } },
143 { KE_KEY, 0x1b, { KEY_ZOOM } },
144 { KE_KEY, 0x1c, { KEY_PROG2 } },
145 { KE_KEY, 0x1d, { KEY_PROG3 } },
146 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
147 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
148 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
149 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
150 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
151 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
152 { KE_KEY, 0x38, { KEY_F14 } },
157 * This is the main structure, we can use it to store useful information
159 struct eeepc_laptop {
160 acpi_handle handle; /* the handle of the acpi device */
161 u32 cm_supported; /* the control methods supported
164 bool hotplug_disabled;
165 u16 event_count[128]; /* count for each event */
167 struct platform_device *platform_device;
168 struct acpi_device *device; /* the device we are in */
169 struct device *hwmon_device;
170 struct backlight_device *backlight_device;
172 struct input_dev *inputdev;
174 struct rfkill *wlan_rfkill;
175 struct rfkill *bluetooth_rfkill;
176 struct rfkill *wwan3g_rfkill;
177 struct rfkill *wimax_rfkill;
179 struct hotplug_slot *hotplug_slot;
180 struct mutex hotplug_lock;
182 struct led_classdev tpd_led;
184 struct workqueue_struct *led_workqueue;
185 struct work_struct tpd_led_work;
191 static int write_acpi_int(acpi_handle handle, const char *method, int val)
193 struct acpi_object_list params;
194 union acpi_object in_obj;
198 params.pointer = &in_obj;
199 in_obj.type = ACPI_TYPE_INTEGER;
200 in_obj.integer.value = val;
202 status = acpi_evaluate_object(handle, (char *)method, ¶ms, NULL);
203 return (status == AE_OK ? 0 : -1);
206 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
209 unsigned long long result;
211 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
212 if (ACPI_FAILURE(status)) {
221 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
223 const char *method = cm_setv[cm];
227 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
230 if (write_acpi_int(eeepc->handle, method, value))
231 pr_warning("Error writing %s\n", method);
235 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
237 const char *method = cm_getv[cm];
242 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
245 if (read_acpi_int(eeepc->handle, method, &value))
246 pr_warning("Error reading %s\n", method);
250 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
253 const char *method = cm_setv[cm];
258 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
261 status = acpi_get_handle(eeepc->handle, (char *)method,
263 if (status != AE_OK) {
264 pr_warning("Error finding %s\n", method);
274 static int parse_arg(const char *buf, unsigned long count, int *val)
278 if (sscanf(buf, "%i", val) != 1)
283 static ssize_t store_sys_acpi(struct device *dev, int cm,
284 const char *buf, size_t count)
286 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
289 rv = parse_arg(buf, count, &value);
291 value = set_acpi(eeepc, cm, value);
297 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
299 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
300 int value = get_acpi(eeepc, cm);
304 return sprintf(buf, "%d\n", value);
307 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
308 static ssize_t show_##_name(struct device *dev, \
309 struct device_attribute *attr, \
312 return show_sys_acpi(dev, _cm, buf); \
314 static ssize_t store_##_name(struct device *dev, \
315 struct device_attribute *attr, \
316 const char *buf, size_t count) \
318 return store_sys_acpi(dev, _cm, buf, count); \
320 static struct device_attribute dev_attr_##_name = { \
322 .name = __stringify(_name), \
324 .show = show_##_name, \
325 .store = store_##_name, \
328 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
329 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
330 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
337 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
339 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
340 c->num = (c->cur >> 8) & 0xff;
342 if (c->cur < 0 || c->num <= 0 || c->num > 12)
347 static ssize_t show_available_cpufv(struct device *dev,
348 struct device_attribute *attr,
351 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
352 struct eeepc_cpufv c;
356 if (get_cpufv(eeepc, &c))
358 for (i = 0; i < c.num; i++)
359 len += sprintf(buf + len, "%d ", i);
360 len += sprintf(buf + len, "\n");
364 static ssize_t show_cpufv(struct device *dev,
365 struct device_attribute *attr,
368 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
369 struct eeepc_cpufv c;
371 if (get_cpufv(eeepc, &c))
373 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
376 static ssize_t store_cpufv(struct device *dev,
377 struct device_attribute *attr,
378 const char *buf, size_t count)
380 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
381 struct eeepc_cpufv c;
384 if (eeepc->cpufv_disabled)
386 if (get_cpufv(eeepc, &c))
388 rv = parse_arg(buf, count, &value);
391 if (!rv || value < 0 || value >= c.num)
393 set_acpi(eeepc, CM_ASL_CPUFV, value);
397 static ssize_t show_cpufv_disabled(struct device *dev,
398 struct device_attribute *attr,
401 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
403 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
406 static ssize_t store_cpufv_disabled(struct device *dev,
407 struct device_attribute *attr,
408 const char *buf, size_t count)
410 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
413 rv = parse_arg(buf, count, &value);
419 if (eeepc->cpufv_disabled)
420 pr_warning("cpufv enabled (not officially supported "
422 eeepc->cpufv_disabled = false;
432 static struct device_attribute dev_attr_cpufv = {
440 static struct device_attribute dev_attr_available_cpufv = {
442 .name = "available_cpufv",
444 .show = show_available_cpufv
447 static struct device_attribute dev_attr_cpufv_disabled = {
449 .name = "cpufv_disabled",
451 .show = show_cpufv_disabled,
452 .store = store_cpufv_disabled
456 static struct attribute *platform_attributes[] = {
457 &dev_attr_camera.attr,
458 &dev_attr_cardr.attr,
460 &dev_attr_cpufv.attr,
461 &dev_attr_available_cpufv.attr,
462 &dev_attr_cpufv_disabled.attr,
466 static struct attribute_group platform_attribute_group = {
467 .attrs = platform_attributes
470 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
474 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
475 if (!eeepc->platform_device)
477 platform_set_drvdata(eeepc->platform_device, eeepc);
479 result = platform_device_add(eeepc->platform_device);
481 goto fail_platform_device;
483 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
484 &platform_attribute_group);
490 platform_device_del(eeepc->platform_device);
491 fail_platform_device:
492 platform_device_put(eeepc->platform_device);
496 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
498 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
499 &platform_attribute_group);
500 platform_device_unregister(eeepc->platform_device);
507 * These functions actually update the LED's, and are called from a
508 * workqueue. By doing this as separate work rather than when the LED
509 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
510 * potentially bad time, such as a timer interrupt.
512 static void tpd_led_update(struct work_struct *work)
514 struct eeepc_laptop *eeepc;
516 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
518 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
521 static void tpd_led_set(struct led_classdev *led_cdev,
522 enum led_brightness value)
524 struct eeepc_laptop *eeepc;
526 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
528 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
529 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
532 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
534 struct eeepc_laptop *eeepc;
536 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
538 return get_acpi(eeepc, CM_ASL_TPD);
541 static int eeepc_led_init(struct eeepc_laptop *eeepc)
545 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
548 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
549 if (!eeepc->led_workqueue)
551 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
553 eeepc->tpd_led.name = "eeepc::touchpad";
554 eeepc->tpd_led.brightness_set = tpd_led_set;
555 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
556 eeepc->tpd_led.brightness_get = tpd_led_get;
557 eeepc->tpd_led.max_brightness = 1;
559 rv = led_classdev_register(&eeepc->platform_device->dev,
562 destroy_workqueue(eeepc->led_workqueue);
569 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
571 if (eeepc->tpd_led.dev)
572 led_classdev_unregister(&eeepc->tpd_led);
573 if (eeepc->led_workqueue)
574 destroy_workqueue(eeepc->led_workqueue);
579 * PCI hotplug (for wlan rfkill)
581 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
583 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
588 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc)
592 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
596 if (eeepc->wlan_rfkill)
597 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
599 mutex_lock(&eeepc->hotplug_lock);
601 if (eeepc->hotplug_slot) {
602 bus = pci_find_bus(0, 1);
604 pr_warning("Unable to find PCI bus 1?\n");
608 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
609 pr_err("Unable to read PCI config space?\n");
612 absent = (l == 0xffffffff);
614 if (blocked != absent) {
615 pr_warning("BIOS says wireless lan is %s, "
616 "but the pci device is %s\n",
617 blocked ? "blocked" : "unblocked",
618 absent ? "absent" : "present");
619 pr_warning("skipped wireless hotplug as probably "
620 "inappropriate for this model\n");
625 dev = pci_get_slot(bus, 0);
627 /* Device already present */
631 dev = pci_scan_single_device(bus, 0);
633 pci_bus_assign_resources(bus);
634 if (pci_bus_add_device(dev))
635 pr_err("Unable to hotplug wifi\n");
638 dev = pci_get_slot(bus, 0);
640 pci_remove_bus_device(dev);
647 mutex_unlock(&eeepc->hotplug_lock);
650 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
652 struct eeepc_laptop *eeepc = data;
654 if (event != ACPI_NOTIFY_BUS_CHECK)
657 eeepc_rfkill_hotplug(eeepc);
660 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
666 status = acpi_get_handle(NULL, node, &handle);
668 if (ACPI_SUCCESS(status)) {
669 status = acpi_install_notify_handler(handle,
673 if (ACPI_FAILURE(status))
674 pr_warning("Failed to register notify on %s\n", node);
681 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
684 acpi_status status = AE_OK;
687 status = acpi_get_handle(NULL, node, &handle);
689 if (ACPI_SUCCESS(status)) {
690 status = acpi_remove_notify_handler(handle,
692 eeepc_rfkill_notify);
693 if (ACPI_FAILURE(status))
694 pr_err("Error removing rfkill notify handler %s\n",
699 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
702 struct eeepc_laptop *eeepc = hotplug_slot->private;
703 int val = get_acpi(eeepc, CM_ASL_WLAN);
705 if (val == 1 || val == 0)
713 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
715 kfree(hotplug_slot->info);
719 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
720 .owner = THIS_MODULE,
721 .get_adapter_status = eeepc_get_adapter_status,
722 .get_power_status = eeepc_get_adapter_status,
725 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
728 struct pci_bus *bus = pci_find_bus(0, 1);
731 pr_err("Unable to find wifi PCI bus\n");
735 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
736 if (!eeepc->hotplug_slot)
739 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
741 if (!eeepc->hotplug_slot->info)
744 eeepc->hotplug_slot->private = eeepc;
745 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
746 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
747 eeepc_get_adapter_status(eeepc->hotplug_slot,
748 &eeepc->hotplug_slot->info->adapter_status);
750 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
752 pr_err("Unable to register hotplug slot - %d\n", ret);
759 kfree(eeepc->hotplug_slot->info);
761 kfree(eeepc->hotplug_slot);
762 eeepc->hotplug_slot = NULL;
770 static int eeepc_rfkill_set(void *data, bool blocked)
772 acpi_handle handle = data;
774 return write_acpi_int(handle, NULL, !blocked);
777 static const struct rfkill_ops eeepc_rfkill_ops = {
778 .set_block = eeepc_rfkill_set,
781 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
782 struct rfkill **rfkill,
784 enum rfkill_type type, int cm)
789 result = acpi_setter_handle(eeepc, cm, &handle);
793 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
794 &eeepc_rfkill_ops, handle);
799 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
800 result = rfkill_register(*rfkill);
802 rfkill_destroy(*rfkill);
809 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
811 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
812 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
813 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
814 if (eeepc->wlan_rfkill) {
815 rfkill_unregister(eeepc->wlan_rfkill);
816 rfkill_destroy(eeepc->wlan_rfkill);
817 eeepc->wlan_rfkill = NULL;
820 * Refresh pci hotplug in case the rfkill state was changed after
821 * eeepc_unregister_rfkill_notifier()
823 eeepc_rfkill_hotplug(eeepc);
824 if (eeepc->hotplug_slot)
825 pci_hp_deregister(eeepc->hotplug_slot);
827 if (eeepc->bluetooth_rfkill) {
828 rfkill_unregister(eeepc->bluetooth_rfkill);
829 rfkill_destroy(eeepc->bluetooth_rfkill);
830 eeepc->bluetooth_rfkill = NULL;
832 if (eeepc->wwan3g_rfkill) {
833 rfkill_unregister(eeepc->wwan3g_rfkill);
834 rfkill_destroy(eeepc->wwan3g_rfkill);
835 eeepc->wwan3g_rfkill = NULL;
837 if (eeepc->wimax_rfkill) {
838 rfkill_unregister(eeepc->wimax_rfkill);
839 rfkill_destroy(eeepc->wimax_rfkill);
840 eeepc->wimax_rfkill = NULL;
844 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
848 mutex_init(&eeepc->hotplug_lock);
850 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
851 "eeepc-wlan", RFKILL_TYPE_WLAN,
854 if (result && result != -ENODEV)
857 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
858 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
861 if (result && result != -ENODEV)
864 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
865 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
868 if (result && result != -ENODEV)
871 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
872 "eeepc-wimax", RFKILL_TYPE_WIMAX,
875 if (result && result != -ENODEV)
878 if (eeepc->hotplug_disabled)
881 result = eeepc_setup_pci_hotplug(eeepc);
883 * If we get -EBUSY then something else is handling the PCI hotplug -
884 * don't fail in this case
886 if (result == -EBUSY)
889 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
890 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
891 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
893 * Refresh pci hotplug in case the rfkill state was changed during
896 eeepc_rfkill_hotplug(eeepc);
899 if (result && result != -ENODEV)
900 eeepc_rfkill_exit(eeepc);
905 * Platform driver - hibernate/resume callbacks
907 static int eeepc_hotk_thaw(struct device *device)
909 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
911 if (eeepc->wlan_rfkill) {
915 * Work around bios bug - acpi _PTS turns off the wireless led
916 * during suspend. Normally it restores it on resume, but
917 * we should kick it ourselves in case hibernation is aborted.
919 wlan = get_acpi(eeepc, CM_ASL_WLAN);
920 set_acpi(eeepc, CM_ASL_WLAN, wlan);
926 static int eeepc_hotk_restore(struct device *device)
928 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
930 /* Refresh both wlan rfkill state and pci hotplug */
931 if (eeepc->wlan_rfkill)
932 eeepc_rfkill_hotplug(eeepc);
934 if (eeepc->bluetooth_rfkill)
935 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
936 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
937 if (eeepc->wwan3g_rfkill)
938 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
939 get_acpi(eeepc, CM_ASL_3G) != 1);
940 if (eeepc->wimax_rfkill)
941 rfkill_set_sw_state(eeepc->wimax_rfkill,
942 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
947 static const struct dev_pm_ops eeepc_pm_ops = {
948 .thaw = eeepc_hotk_thaw,
949 .restore = eeepc_hotk_restore,
952 static struct platform_driver platform_driver = {
954 .name = EEEPC_LAPTOP_FILE,
955 .owner = THIS_MODULE,
964 #define EEEPC_EC_SC00 0x61
965 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
966 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
967 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
969 #define EEEPC_EC_SFB0 0xD0
970 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
972 static int eeepc_get_fan_pwm(void)
976 ec_read(EEEPC_EC_FAN_PWM, &value);
977 return value * 255 / 100;
980 static void eeepc_set_fan_pwm(int value)
982 value = SENSORS_LIMIT(value, 0, 255);
983 value = value * 100 / 255;
984 ec_write(EEEPC_EC_FAN_PWM, value);
987 static int eeepc_get_fan_rpm(void)
992 ec_read(EEEPC_EC_FAN_HRPM, &high);
993 ec_read(EEEPC_EC_FAN_LRPM, &low);
994 return high << 8 | low;
997 static int eeepc_get_fan_ctrl(void)
1001 ec_read(EEEPC_EC_FAN_CTRL, &value);
1003 return 1; /* manual */
1005 return 2; /* automatic */
1008 static void eeepc_set_fan_ctrl(int manual)
1012 ec_read(EEEPC_EC_FAN_CTRL, &value);
1017 ec_write(EEEPC_EC_FAN_CTRL, value);
1020 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1024 rv = parse_arg(buf, count, &value);
1030 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1032 return sprintf(buf, "%d\n", get());
1035 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
1036 static ssize_t show_##_name(struct device *dev, \
1037 struct device_attribute *attr, \
1040 return show_sys_hwmon(_set, buf); \
1042 static ssize_t store_##_name(struct device *dev, \
1043 struct device_attribute *attr, \
1044 const char *buf, size_t count) \
1046 return store_sys_hwmon(_get, buf, count); \
1048 static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
1050 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
1051 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
1052 eeepc_get_fan_pwm, eeepc_set_fan_pwm);
1053 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1054 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
1057 show_name(struct device *dev, struct device_attribute *attr, char *buf)
1059 return sprintf(buf, "eeepc\n");
1061 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
1063 static struct attribute *hwmon_attributes[] = {
1064 &sensor_dev_attr_pwm1.dev_attr.attr,
1065 &sensor_dev_attr_fan1_input.dev_attr.attr,
1066 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1067 &sensor_dev_attr_name.dev_attr.attr,
1071 static struct attribute_group hwmon_attribute_group = {
1072 .attrs = hwmon_attributes
1075 static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc)
1077 struct device *hwmon;
1079 hwmon = eeepc->hwmon_device;
1082 sysfs_remove_group(&hwmon->kobj,
1083 &hwmon_attribute_group);
1084 hwmon_device_unregister(hwmon);
1085 eeepc->hwmon_device = NULL;
1088 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1090 struct device *hwmon;
1093 hwmon = hwmon_device_register(&eeepc->platform_device->dev);
1094 if (IS_ERR(hwmon)) {
1095 pr_err("Could not register eeepc hwmon device\n");
1096 eeepc->hwmon_device = NULL;
1097 return PTR_ERR(hwmon);
1099 eeepc->hwmon_device = hwmon;
1100 result = sysfs_create_group(&hwmon->kobj,
1101 &hwmon_attribute_group);
1103 eeepc_hwmon_exit(eeepc);
1110 static int read_brightness(struct backlight_device *bd)
1112 struct eeepc_laptop *eeepc = bl_get_data(bd);
1114 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1117 static int set_brightness(struct backlight_device *bd, int value)
1119 struct eeepc_laptop *eeepc = bl_get_data(bd);
1121 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1124 static int update_bl_status(struct backlight_device *bd)
1126 return set_brightness(bd, bd->props.brightness);
1129 static const struct backlight_ops eeepcbl_ops = {
1130 .get_brightness = read_brightness,
1131 .update_status = update_bl_status,
1134 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1136 struct backlight_device *bd = eeepc->backlight_device;
1137 int old = bd->props.brightness;
1139 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1144 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1146 struct backlight_properties props;
1147 struct backlight_device *bd;
1149 memset(&props, 0, sizeof(struct backlight_properties));
1150 props.max_brightness = 15;
1151 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1152 &eeepc->platform_device->dev, eeepc,
1153 &eeepcbl_ops, &props);
1155 pr_err("Could not register eeepc backlight device\n");
1156 eeepc->backlight_device = NULL;
1159 eeepc->backlight_device = bd;
1160 bd->props.brightness = read_brightness(bd);
1161 bd->props.power = FB_BLANK_UNBLANK;
1162 backlight_update_status(bd);
1166 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1168 if (eeepc->backlight_device)
1169 backlight_device_unregister(eeepc->backlight_device);
1170 eeepc->backlight_device = NULL;
1175 * Input device (i.e. hotkeys)
1177 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1179 struct input_dev *input;
1182 input = input_allocate_device();
1184 pr_info("Unable to allocate input device\n");
1188 input->name = "Asus EeePC extra buttons";
1189 input->phys = EEEPC_LAPTOP_FILE "/input0";
1190 input->id.bustype = BUS_HOST;
1191 input->dev.parent = &eeepc->platform_device->dev;
1193 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1195 pr_err("Unable to setup input device keymap\n");
1199 error = input_register_device(input);
1201 pr_err("Unable to register input device\n");
1202 goto err_free_keymap;
1205 eeepc->inputdev = input;
1209 sparse_keymap_free(input);
1211 input_free_device(input);
1215 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1217 if (eeepc->inputdev) {
1218 sparse_keymap_free(eeepc->inputdev);
1219 input_unregister_device(eeepc->inputdev);
1221 eeepc->inputdev = NULL;
1227 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1229 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1232 if (event > ACPI_MAX_SYS_NOTIFY)
1234 count = eeepc->event_count[event % 128]++;
1235 acpi_bus_generate_proc_event(device, event, count);
1236 acpi_bus_generate_netlink_event(device->pnp.device_class,
1237 dev_name(&device->dev), event,
1240 /* Brightness events are special */
1241 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
1243 /* Ignore them completely if the acpi video driver is used */
1244 if (eeepc->backlight_device != NULL) {
1245 int old_brightness, new_brightness;
1247 /* Update the backlight device. */
1248 old_brightness = eeepc_backlight_notify(eeepc);
1250 /* Convert event to keypress (obsolescent hack) */
1251 new_brightness = event - NOTIFY_BRN_MIN;
1253 if (new_brightness < old_brightness) {
1254 event = NOTIFY_BRN_MIN; /* brightness down */
1255 } else if (new_brightness > old_brightness) {
1256 event = NOTIFY_BRN_MAX; /* brightness up */
1259 * no change in brightness - already at min/max,
1260 * event will be desired value (or else ignored)
1263 sparse_keymap_report_event(eeepc->inputdev, event,
1267 /* Everything else is a bona-fide keypress event */
1268 sparse_keymap_report_event(eeepc->inputdev, event, 1, true);
1272 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1276 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1281 * Blacklist for setting cpufv (cpu speed).
1283 * EeePC 4G ("701") implements CFVS, but it is not supported
1284 * by the pre-installed OS, and the original option to change it
1285 * in the BIOS setup screen was removed in later versions.
1287 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1288 * this applies to all "701" models (4G/4G Surf/2G Surf).
1290 * So Asus made a deliberate decision not to support it on this model.
1291 * We have several reports that using it can cause the system to hang
1293 * The hang has also been reported on a "702" (Model name "8G"?).
1295 * We avoid dmi_check_system() / dmi_match(), because they use
1296 * substring matching. We don't want to affect the "701SD"
1297 * and "701SDX" models, because they do support S.H.E.
1299 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1300 eeepc->cpufv_disabled = true;
1301 pr_info("model %s does not officially support setting cpu "
1303 pr_info("cpufv disabled to avoid instability\n");
1307 * Blacklist for wlan hotplug
1309 * Eeepc 1005HA doesn't work like others models and don't need the
1310 * hotplug code. In fact, current hotplug code seems to unplug another
1313 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1314 strcmp(model, "1005PE") == 0) {
1315 eeepc->hotplug_disabled = true;
1316 pr_info("wlan hotplug disabled\n");
1320 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1324 /* Some BIOSes do not report cm although it is avaliable.
1325 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1326 if (!(eeepc->cm_supported & (1 << cm))
1327 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1328 pr_info("%s (%x) not reported by BIOS,"
1329 " enabling anyway\n", name, 1 << cm);
1330 eeepc->cm_supported |= 1 << cm;
1334 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1336 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1337 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1338 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1339 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1342 static int __devinit eeepc_acpi_init(struct eeepc_laptop *eeepc)
1344 unsigned int init_flags;
1347 result = acpi_bus_get_status(eeepc->device);
1350 if (!eeepc->device->status.present) {
1351 pr_err("Hotkey device not present, aborting\n");
1355 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1356 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1358 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1359 pr_err("Hotkey initialization failed\n");
1363 /* get control methods supported */
1364 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1365 pr_err("Get control methods supported failed\n");
1369 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1374 static void __devinit eeepc_enable_camera(struct eeepc_laptop *eeepc)
1377 * If the following call to set_acpi() fails, it's because there's no
1378 * camera so we can ignore the error.
1380 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1381 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1384 static bool eeepc_device_present;
1386 static int __devinit eeepc_acpi_add(struct acpi_device *device)
1388 struct eeepc_laptop *eeepc;
1391 pr_notice(EEEPC_LAPTOP_NAME "\n");
1392 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1395 eeepc->handle = device->handle;
1396 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1397 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1398 device->driver_data = eeepc;
1399 eeepc->device = device;
1401 eeepc->hotplug_disabled = hotplug_disabled;
1403 eeepc_dmi_check(eeepc);
1405 result = eeepc_acpi_init(eeepc);
1408 eeepc_enable_camera(eeepc);
1411 * Register the platform device first. It is used as a parent for the
1412 * sub-devices below.
1414 * Note that if there are multiple instances of this ACPI device it
1415 * will bail out, because the platform device is registered with a
1416 * fixed name. Of course it doesn't make sense to have more than one,
1417 * and machine-specific scripts find the fixed name convenient. But
1418 * It's also good for us to exclude multiple instances because both
1419 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1420 * (the EC and the wlan PCI slot respectively).
1422 result = eeepc_platform_init(eeepc);
1426 if (!acpi_video_backlight_support()) {
1427 result = eeepc_backlight_init(eeepc);
1429 goto fail_backlight;
1431 pr_info("Backlight controlled by ACPI video driver\n");
1433 result = eeepc_input_init(eeepc);
1437 result = eeepc_hwmon_init(eeepc);
1441 result = eeepc_led_init(eeepc);
1445 result = eeepc_rfkill_init(eeepc);
1449 eeepc_device_present = true;
1453 eeepc_led_exit(eeepc);
1455 eeepc_hwmon_exit(eeepc);
1457 eeepc_input_exit(eeepc);
1459 eeepc_backlight_exit(eeepc);
1461 eeepc_platform_exit(eeepc);
1468 static int eeepc_acpi_remove(struct acpi_device *device, int type)
1470 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1472 eeepc_backlight_exit(eeepc);
1473 eeepc_rfkill_exit(eeepc);
1474 eeepc_input_exit(eeepc);
1475 eeepc_hwmon_exit(eeepc);
1476 eeepc_led_exit(eeepc);
1477 eeepc_platform_exit(eeepc);
1484 static const struct acpi_device_id eeepc_device_ids[] = {
1485 {EEEPC_ACPI_HID, 0},
1488 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1490 static struct acpi_driver eeepc_acpi_driver = {
1491 .name = EEEPC_LAPTOP_NAME,
1492 .class = EEEPC_ACPI_CLASS,
1493 .owner = THIS_MODULE,
1494 .ids = eeepc_device_ids,
1495 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1497 .add = eeepc_acpi_add,
1498 .remove = eeepc_acpi_remove,
1499 .notify = eeepc_acpi_notify,
1504 static int __init eeepc_laptop_init(void)
1508 result = platform_driver_register(&platform_driver);
1512 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1514 goto fail_acpi_driver;
1516 if (!eeepc_device_present) {
1518 goto fail_no_device;
1524 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1526 platform_driver_unregister(&platform_driver);
1530 static void __exit eeepc_laptop_exit(void)
1532 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1533 platform_driver_unregister(&platform_driver);
1536 module_init(eeepc_laptop_init);
1537 module_exit(eeepc_laptop_exit);