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 <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>
41 #define EEEPC_LAPTOP_VERSION "0.1"
42 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
43 #define EEEPC_LAPTOP_FILE "eeepc"
45 #define EEEPC_ACPI_CLASS "hotkey"
46 #define EEEPC_ACPI_DEVICE_NAME "Hotkey"
47 #define EEEPC_ACPI_HID "ASUS010"
49 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
50 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
51 MODULE_LICENSE("GPL");
53 static bool hotplug_disabled;
55 module_param(hotplug_disabled, bool, 0444);
56 MODULE_PARM_DESC(hotplug_disabled,
57 "Disable hotplug for wireless device. "
58 "If your laptop need that, please report to "
59 "acpi4asus-user@lists.sourceforge.net.");
62 * Definitions for Asus EeePC
64 #define NOTIFY_BRN_MIN 0x20
65 #define NOTIFY_BRN_MAX 0x2f
68 DISABLE_ASL_WLAN = 0x0001,
69 DISABLE_ASL_BLUETOOTH = 0x0002,
70 DISABLE_ASL_IRDA = 0x0004,
71 DISABLE_ASL_CAMERA = 0x0008,
72 DISABLE_ASL_TV = 0x0010,
73 DISABLE_ASL_GPS = 0x0020,
74 DISABLE_ASL_DISPLAYSWITCH = 0x0040,
75 DISABLE_ASL_MODEM = 0x0080,
76 DISABLE_ASL_CARDREADER = 0x0100,
77 DISABLE_ASL_3G = 0x0200,
78 DISABLE_ASL_WIMAX = 0x0400,
79 DISABLE_ASL_HWCF = 0x0800
96 CM_ASL_CPUTEMPERATURE,
109 CM_ASL_PANELPOWER, /*P901*/
113 static const char *cm_getv[] = {
114 "WLDG", "BTHG", NULL, NULL,
115 "CAMG", NULL, NULL, NULL,
116 NULL, "PBLG", NULL, NULL,
117 "CFVG", NULL, NULL, NULL,
118 "USBG", NULL, NULL, "MODG",
119 "CRDG", "M3GG", "WIMG", "HWCF",
120 "LIDG", "TYPE", "PBPG", "TPDG"
123 static const char *cm_setv[] = {
124 "WLDS", "BTHS", NULL, NULL,
125 "CAMS", NULL, NULL, NULL,
126 "SDSP", "PBLS", "HDPS", NULL,
127 "CFVS", NULL, NULL, NULL,
128 "USBG", NULL, NULL, "MODS",
129 "CRDS", "M3GS", "WIMS", NULL,
130 NULL, NULL, "PBPS", "TPDS"
133 static const struct key_entry eeepc_keymap[] = {
134 { KE_KEY, 0x10, { KEY_WLAN } },
135 { KE_KEY, 0x11, { KEY_WLAN } },
136 { KE_KEY, 0x12, { KEY_PROG1 } },
137 { KE_KEY, 0x13, { KEY_MUTE } },
138 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
139 { KE_KEY, 0x15, { KEY_VOLUMEUP } },
140 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
141 { KE_KEY, 0x1a, { KEY_COFFEE } },
142 { KE_KEY, 0x1b, { KEY_ZOOM } },
143 { KE_KEY, 0x1c, { KEY_PROG2 } },
144 { KE_KEY, 0x1d, { KEY_PROG3 } },
145 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
146 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
147 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
148 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
149 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
150 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
151 { KE_KEY, 0x38, { KEY_F14 } },
156 * This is the main structure, we can use it to store useful information
158 struct eeepc_laptop {
159 acpi_handle handle; /* the handle of the acpi device */
160 u32 cm_supported; /* the control methods supported
163 bool hotplug_disabled;
164 u16 event_count[128]; /* count for each event */
166 struct platform_device *platform_device;
167 struct acpi_device *device; /* the device we are in */
168 struct backlight_device *backlight_device;
170 struct input_dev *inputdev;
172 struct rfkill *wlan_rfkill;
173 struct rfkill *bluetooth_rfkill;
174 struct rfkill *wwan3g_rfkill;
175 struct rfkill *wimax_rfkill;
177 struct hotplug_slot *hotplug_slot;
178 struct mutex hotplug_lock;
180 struct led_classdev tpd_led;
182 struct workqueue_struct *led_workqueue;
183 struct work_struct tpd_led_work;
189 static int write_acpi_int(acpi_handle handle, const char *method, int val)
193 status = acpi_execute_simple_method(handle, (char *)method, val);
195 return (status == AE_OK ? 0 : -1);
198 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
201 unsigned long long result;
203 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
204 if (ACPI_FAILURE(status)) {
213 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
215 const char *method = cm_setv[cm];
219 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
222 if (write_acpi_int(eeepc->handle, method, value))
223 pr_warn("Error writing %s\n", method);
227 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
229 const char *method = cm_getv[cm];
234 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
237 if (read_acpi_int(eeepc->handle, method, &value))
238 pr_warn("Error reading %s\n", method);
242 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
245 const char *method = cm_setv[cm];
250 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
253 status = acpi_get_handle(eeepc->handle, (char *)method,
255 if (status != AE_OK) {
256 pr_warn("Error finding %s\n", method);
266 static int parse_arg(const char *buf, unsigned long count, int *val)
270 if (sscanf(buf, "%i", val) != 1)
275 static ssize_t store_sys_acpi(struct device *dev, int cm,
276 const char *buf, size_t count)
278 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
281 rv = parse_arg(buf, count, &value);
283 value = set_acpi(eeepc, cm, value);
289 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
291 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
292 int value = get_acpi(eeepc, cm);
296 return sprintf(buf, "%d\n", value);
299 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
300 static ssize_t show_##_name(struct device *dev, \
301 struct device_attribute *attr, \
304 return show_sys_acpi(dev, _cm, buf); \
306 static ssize_t store_##_name(struct device *dev, \
307 struct device_attribute *attr, \
308 const char *buf, size_t count) \
310 return store_sys_acpi(dev, _cm, buf, count); \
312 static struct device_attribute dev_attr_##_name = { \
314 .name = __stringify(_name), \
316 .show = show_##_name, \
317 .store = store_##_name, \
320 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
321 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
322 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
329 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
331 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
332 c->num = (c->cur >> 8) & 0xff;
334 if (c->cur < 0 || c->num <= 0 || c->num > 12)
339 static ssize_t show_available_cpufv(struct device *dev,
340 struct device_attribute *attr,
343 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
344 struct eeepc_cpufv c;
348 if (get_cpufv(eeepc, &c))
350 for (i = 0; i < c.num; i++)
351 len += sprintf(buf + len, "%d ", i);
352 len += sprintf(buf + len, "\n");
356 static ssize_t show_cpufv(struct device *dev,
357 struct device_attribute *attr,
360 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
361 struct eeepc_cpufv c;
363 if (get_cpufv(eeepc, &c))
365 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
368 static ssize_t store_cpufv(struct device *dev,
369 struct device_attribute *attr,
370 const char *buf, size_t count)
372 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
373 struct eeepc_cpufv c;
376 if (eeepc->cpufv_disabled)
378 if (get_cpufv(eeepc, &c))
380 rv = parse_arg(buf, count, &value);
383 if (!rv || value < 0 || value >= c.num)
385 set_acpi(eeepc, CM_ASL_CPUFV, value);
389 static ssize_t show_cpufv_disabled(struct device *dev,
390 struct device_attribute *attr,
393 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
395 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
398 static ssize_t store_cpufv_disabled(struct device *dev,
399 struct device_attribute *attr,
400 const char *buf, size_t count)
402 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
405 rv = parse_arg(buf, count, &value);
411 if (eeepc->cpufv_disabled)
412 pr_warn("cpufv enabled (not officially supported "
414 eeepc->cpufv_disabled = false;
424 static struct device_attribute dev_attr_cpufv = {
432 static struct device_attribute dev_attr_available_cpufv = {
434 .name = "available_cpufv",
436 .show = show_available_cpufv
439 static struct device_attribute dev_attr_cpufv_disabled = {
441 .name = "cpufv_disabled",
443 .show = show_cpufv_disabled,
444 .store = store_cpufv_disabled
448 static struct attribute *platform_attributes[] = {
449 &dev_attr_camera.attr,
450 &dev_attr_cardr.attr,
452 &dev_attr_cpufv.attr,
453 &dev_attr_available_cpufv.attr,
454 &dev_attr_cpufv_disabled.attr,
458 static struct attribute_group platform_attribute_group = {
459 .attrs = platform_attributes
462 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
466 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
467 if (!eeepc->platform_device)
469 platform_set_drvdata(eeepc->platform_device, eeepc);
471 result = platform_device_add(eeepc->platform_device);
473 goto fail_platform_device;
475 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
476 &platform_attribute_group);
482 platform_device_del(eeepc->platform_device);
483 fail_platform_device:
484 platform_device_put(eeepc->platform_device);
488 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
490 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
491 &platform_attribute_group);
492 platform_device_unregister(eeepc->platform_device);
499 * These functions actually update the LED's, and are called from a
500 * workqueue. By doing this as separate work rather than when the LED
501 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
502 * potentially bad time, such as a timer interrupt.
504 static void tpd_led_update(struct work_struct *work)
506 struct eeepc_laptop *eeepc;
508 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
510 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
513 static void tpd_led_set(struct led_classdev *led_cdev,
514 enum led_brightness value)
516 struct eeepc_laptop *eeepc;
518 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
520 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
521 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
524 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
526 struct eeepc_laptop *eeepc;
528 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
530 return get_acpi(eeepc, CM_ASL_TPD);
533 static int eeepc_led_init(struct eeepc_laptop *eeepc)
537 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
540 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
541 if (!eeepc->led_workqueue)
543 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
545 eeepc->tpd_led.name = "eeepc::touchpad";
546 eeepc->tpd_led.brightness_set = tpd_led_set;
547 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
548 eeepc->tpd_led.brightness_get = tpd_led_get;
549 eeepc->tpd_led.max_brightness = 1;
551 rv = led_classdev_register(&eeepc->platform_device->dev,
554 destroy_workqueue(eeepc->led_workqueue);
561 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
563 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
564 led_classdev_unregister(&eeepc->tpd_led);
565 if (eeepc->led_workqueue)
566 destroy_workqueue(eeepc->led_workqueue);
571 * PCI hotplug (for wlan rfkill)
573 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
575 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
580 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
582 struct pci_dev *port;
585 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
589 if (eeepc->wlan_rfkill)
590 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
592 mutex_lock(&eeepc->hotplug_lock);
593 pci_lock_rescan_remove();
595 if (eeepc->hotplug_slot) {
596 port = acpi_get_pci_dev(handle);
598 pr_warning("Unable to find port\n");
602 bus = port->subordinate;
605 pr_warn("Unable to find PCI bus 1?\n");
609 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
610 pr_err("Unable to read PCI config space?\n");
614 absent = (l == 0xffffffff);
616 if (blocked != absent) {
617 pr_warn("BIOS says wireless lan is %s, "
618 "but the pci device is %s\n",
619 blocked ? "blocked" : "unblocked",
620 absent ? "absent" : "present");
621 pr_warn("skipped wireless hotplug as probably "
622 "inappropriate for this model\n");
627 dev = pci_get_slot(bus, 0);
629 /* Device already present */
633 dev = pci_scan_single_device(bus, 0);
635 pci_bus_assign_resources(bus);
636 pci_bus_add_device(dev);
639 dev = pci_get_slot(bus, 0);
641 pci_stop_and_remove_bus_device(dev);
650 pci_unlock_rescan_remove();
651 mutex_unlock(&eeepc->hotplug_lock);
654 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
656 acpi_status status = AE_OK;
659 status = acpi_get_handle(NULL, node, &handle);
661 if (ACPI_SUCCESS(status))
662 eeepc_rfkill_hotplug(eeepc, handle);
665 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
667 struct eeepc_laptop *eeepc = data;
669 if (event != ACPI_NOTIFY_BUS_CHECK)
672 eeepc_rfkill_hotplug(eeepc, handle);
675 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
681 status = acpi_get_handle(NULL, node, &handle);
683 if (ACPI_SUCCESS(status)) {
684 status = acpi_install_notify_handler(handle,
688 if (ACPI_FAILURE(status))
689 pr_warn("Failed to register notify on %s\n", node);
692 * Refresh pci hotplug in case the rfkill state was
693 * changed during setup.
695 eeepc_rfkill_hotplug(eeepc, handle);
702 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
705 acpi_status status = AE_OK;
708 status = acpi_get_handle(NULL, node, &handle);
710 if (ACPI_SUCCESS(status)) {
711 status = acpi_remove_notify_handler(handle,
713 eeepc_rfkill_notify);
714 if (ACPI_FAILURE(status))
715 pr_err("Error removing rfkill notify handler %s\n",
718 * Refresh pci hotplug in case the rfkill
719 * state was changed after
720 * eeepc_unregister_rfkill_notifier()
722 eeepc_rfkill_hotplug(eeepc, handle);
726 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
729 struct eeepc_laptop *eeepc = hotplug_slot->private;
730 int val = get_acpi(eeepc, CM_ASL_WLAN);
732 if (val == 1 || val == 0)
740 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
742 kfree(hotplug_slot->info);
746 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
747 .owner = THIS_MODULE,
748 .get_adapter_status = eeepc_get_adapter_status,
749 .get_power_status = eeepc_get_adapter_status,
752 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
755 struct pci_bus *bus = pci_find_bus(0, 1);
758 pr_err("Unable to find wifi PCI bus\n");
762 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
763 if (!eeepc->hotplug_slot)
766 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
768 if (!eeepc->hotplug_slot->info)
771 eeepc->hotplug_slot->private = eeepc;
772 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
773 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
774 eeepc_get_adapter_status(eeepc->hotplug_slot,
775 &eeepc->hotplug_slot->info->adapter_status);
777 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
779 pr_err("Unable to register hotplug slot - %d\n", ret);
786 kfree(eeepc->hotplug_slot->info);
788 kfree(eeepc->hotplug_slot);
789 eeepc->hotplug_slot = NULL;
797 static int eeepc_rfkill_set(void *data, bool blocked)
799 acpi_handle handle = data;
801 return write_acpi_int(handle, NULL, !blocked);
804 static const struct rfkill_ops eeepc_rfkill_ops = {
805 .set_block = eeepc_rfkill_set,
808 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
809 struct rfkill **rfkill,
811 enum rfkill_type type, int cm)
816 result = acpi_setter_handle(eeepc, cm, &handle);
820 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
821 &eeepc_rfkill_ops, handle);
826 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
827 result = rfkill_register(*rfkill);
829 rfkill_destroy(*rfkill);
836 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
838 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
839 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
840 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
841 if (eeepc->wlan_rfkill) {
842 rfkill_unregister(eeepc->wlan_rfkill);
843 rfkill_destroy(eeepc->wlan_rfkill);
844 eeepc->wlan_rfkill = NULL;
847 if (eeepc->hotplug_slot)
848 pci_hp_deregister(eeepc->hotplug_slot);
850 if (eeepc->bluetooth_rfkill) {
851 rfkill_unregister(eeepc->bluetooth_rfkill);
852 rfkill_destroy(eeepc->bluetooth_rfkill);
853 eeepc->bluetooth_rfkill = NULL;
855 if (eeepc->wwan3g_rfkill) {
856 rfkill_unregister(eeepc->wwan3g_rfkill);
857 rfkill_destroy(eeepc->wwan3g_rfkill);
858 eeepc->wwan3g_rfkill = NULL;
860 if (eeepc->wimax_rfkill) {
861 rfkill_unregister(eeepc->wimax_rfkill);
862 rfkill_destroy(eeepc->wimax_rfkill);
863 eeepc->wimax_rfkill = NULL;
867 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
871 mutex_init(&eeepc->hotplug_lock);
873 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
874 "eeepc-wlan", RFKILL_TYPE_WLAN,
877 if (result && result != -ENODEV)
880 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
881 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
884 if (result && result != -ENODEV)
887 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
888 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
891 if (result && result != -ENODEV)
894 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
895 "eeepc-wimax", RFKILL_TYPE_WIMAX,
898 if (result && result != -ENODEV)
901 if (eeepc->hotplug_disabled)
904 result = eeepc_setup_pci_hotplug(eeepc);
906 * If we get -EBUSY then something else is handling the PCI hotplug -
907 * don't fail in this case
909 if (result == -EBUSY)
912 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
913 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
914 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
917 if (result && result != -ENODEV)
918 eeepc_rfkill_exit(eeepc);
923 * Platform driver - hibernate/resume callbacks
925 static int eeepc_hotk_thaw(struct device *device)
927 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
929 if (eeepc->wlan_rfkill) {
933 * Work around bios bug - acpi _PTS turns off the wireless led
934 * during suspend. Normally it restores it on resume, but
935 * we should kick it ourselves in case hibernation is aborted.
937 wlan = get_acpi(eeepc, CM_ASL_WLAN);
938 set_acpi(eeepc, CM_ASL_WLAN, wlan);
944 static int eeepc_hotk_restore(struct device *device)
946 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
948 /* Refresh both wlan rfkill state and pci hotplug */
949 if (eeepc->wlan_rfkill) {
950 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5");
951 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6");
952 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7");
955 if (eeepc->bluetooth_rfkill)
956 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
957 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
958 if (eeepc->wwan3g_rfkill)
959 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
960 get_acpi(eeepc, CM_ASL_3G) != 1);
961 if (eeepc->wimax_rfkill)
962 rfkill_set_sw_state(eeepc->wimax_rfkill,
963 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
968 static const struct dev_pm_ops eeepc_pm_ops = {
969 .thaw = eeepc_hotk_thaw,
970 .restore = eeepc_hotk_restore,
973 static struct platform_driver platform_driver = {
975 .name = EEEPC_LAPTOP_FILE,
976 .owner = THIS_MODULE,
985 #define EEEPC_EC_SC00 0x61
986 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
987 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
988 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
990 #define EEEPC_EC_SFB0 0xD0
991 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
993 static int eeepc_get_fan_pwm(void)
997 ec_read(EEEPC_EC_FAN_PWM, &value);
998 return value * 255 / 100;
1001 static void eeepc_set_fan_pwm(int value)
1003 value = clamp_val(value, 0, 255);
1004 value = value * 100 / 255;
1005 ec_write(EEEPC_EC_FAN_PWM, value);
1008 static int eeepc_get_fan_rpm(void)
1013 ec_read(EEEPC_EC_FAN_HRPM, &high);
1014 ec_read(EEEPC_EC_FAN_LRPM, &low);
1015 return high << 8 | low;
1018 static int eeepc_get_fan_ctrl(void)
1022 ec_read(EEEPC_EC_FAN_CTRL, &value);
1024 return 1; /* manual */
1026 return 2; /* automatic */
1029 static void eeepc_set_fan_ctrl(int manual)
1033 ec_read(EEEPC_EC_FAN_CTRL, &value);
1038 ec_write(EEEPC_EC_FAN_CTRL, value);
1041 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1045 rv = parse_arg(buf, count, &value);
1051 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1053 return sprintf(buf, "%d\n", get());
1056 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
1057 static ssize_t show_##_name(struct device *dev, \
1058 struct device_attribute *attr, \
1061 return show_sys_hwmon(_set, buf); \
1063 static ssize_t store_##_name(struct device *dev, \
1064 struct device_attribute *attr, \
1065 const char *buf, size_t count) \
1067 return store_sys_hwmon(_get, buf, count); \
1069 static DEVICE_ATTR(_name, _mode, show_##_name, store_##_name);
1071 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
1072 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
1073 eeepc_get_fan_pwm, eeepc_set_fan_pwm);
1074 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1075 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
1077 static struct attribute *hwmon_attrs[] = {
1078 &dev_attr_pwm1.attr,
1079 &dev_attr_fan1_input.attr,
1080 &dev_attr_pwm1_enable.attr,
1083 ATTRIBUTE_GROUPS(hwmon);
1085 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1087 struct device *dev = &eeepc->platform_device->dev;
1088 struct device *hwmon;
1090 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1092 if (IS_ERR(hwmon)) {
1093 pr_err("Could not register eeepc hwmon device\n");
1094 return PTR_ERR(hwmon);
1102 static int read_brightness(struct backlight_device *bd)
1104 struct eeepc_laptop *eeepc = bl_get_data(bd);
1106 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1109 static int set_brightness(struct backlight_device *bd, int value)
1111 struct eeepc_laptop *eeepc = bl_get_data(bd);
1113 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1116 static int update_bl_status(struct backlight_device *bd)
1118 return set_brightness(bd, bd->props.brightness);
1121 static const struct backlight_ops eeepcbl_ops = {
1122 .get_brightness = read_brightness,
1123 .update_status = update_bl_status,
1126 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1128 struct backlight_device *bd = eeepc->backlight_device;
1129 int old = bd->props.brightness;
1131 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1136 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1138 struct backlight_properties props;
1139 struct backlight_device *bd;
1141 memset(&props, 0, sizeof(struct backlight_properties));
1142 props.type = BACKLIGHT_PLATFORM;
1143 props.max_brightness = 15;
1144 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1145 &eeepc->platform_device->dev, eeepc,
1146 &eeepcbl_ops, &props);
1148 pr_err("Could not register eeepc backlight device\n");
1149 eeepc->backlight_device = NULL;
1152 eeepc->backlight_device = bd;
1153 bd->props.brightness = read_brightness(bd);
1154 bd->props.power = FB_BLANK_UNBLANK;
1155 backlight_update_status(bd);
1159 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1161 if (eeepc->backlight_device)
1162 backlight_device_unregister(eeepc->backlight_device);
1163 eeepc->backlight_device = NULL;
1168 * Input device (i.e. hotkeys)
1170 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1172 struct input_dev *input;
1175 input = input_allocate_device();
1179 input->name = "Asus EeePC extra buttons";
1180 input->phys = EEEPC_LAPTOP_FILE "/input0";
1181 input->id.bustype = BUS_HOST;
1182 input->dev.parent = &eeepc->platform_device->dev;
1184 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1186 pr_err("Unable to setup input device keymap\n");
1190 error = input_register_device(input);
1192 pr_err("Unable to register input device\n");
1193 goto err_free_keymap;
1196 eeepc->inputdev = input;
1200 sparse_keymap_free(input);
1202 input_free_device(input);
1206 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1208 if (eeepc->inputdev) {
1209 sparse_keymap_free(eeepc->inputdev);
1210 input_unregister_device(eeepc->inputdev);
1212 eeepc->inputdev = NULL;
1218 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1220 if (!eeepc->inputdev)
1222 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1223 pr_info("Unknown key %x pressed\n", event);
1226 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1228 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1231 if (event > ACPI_MAX_SYS_NOTIFY)
1233 count = eeepc->event_count[event % 128]++;
1234 acpi_bus_generate_netlink_event(device->pnp.device_class,
1235 dev_name(&device->dev), event,
1238 /* Brightness events are special */
1239 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
1241 /* Ignore them completely if the acpi video driver is used */
1242 if (eeepc->backlight_device != NULL) {
1243 int old_brightness, new_brightness;
1245 /* Update the backlight device. */
1246 old_brightness = eeepc_backlight_notify(eeepc);
1248 /* Convert event to keypress (obsolescent hack) */
1249 new_brightness = event - NOTIFY_BRN_MIN;
1251 if (new_brightness < old_brightness) {
1252 event = NOTIFY_BRN_MIN; /* brightness down */
1253 } else if (new_brightness > old_brightness) {
1254 event = NOTIFY_BRN_MAX; /* brightness up */
1257 * no change in brightness - already at min/max,
1258 * event will be desired value (or else ignored)
1261 eeepc_input_notify(eeepc, event);
1264 /* Everything else is a bona-fide keypress event */
1265 eeepc_input_notify(eeepc, event);
1269 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1273 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1278 * Blacklist for setting cpufv (cpu speed).
1280 * EeePC 4G ("701") implements CFVS, but it is not supported
1281 * by the pre-installed OS, and the original option to change it
1282 * in the BIOS setup screen was removed in later versions.
1284 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1285 * this applies to all "701" models (4G/4G Surf/2G Surf).
1287 * So Asus made a deliberate decision not to support it on this model.
1288 * We have several reports that using it can cause the system to hang
1290 * The hang has also been reported on a "702" (Model name "8G"?).
1292 * We avoid dmi_check_system() / dmi_match(), because they use
1293 * substring matching. We don't want to affect the "701SD"
1294 * and "701SDX" models, because they do support S.H.E.
1296 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1297 eeepc->cpufv_disabled = true;
1298 pr_info("model %s does not officially support setting cpu "
1300 pr_info("cpufv disabled to avoid instability\n");
1304 * Blacklist for wlan hotplug
1306 * Eeepc 1005HA doesn't work like others models and don't need the
1307 * hotplug code. In fact, current hotplug code seems to unplug another
1310 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1311 strcmp(model, "1005PE") == 0) {
1312 eeepc->hotplug_disabled = true;
1313 pr_info("wlan hotplug disabled\n");
1317 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1321 /* Some BIOSes do not report cm although it is available.
1322 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1323 if (!(eeepc->cm_supported & (1 << cm))
1324 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1325 pr_info("%s (%x) not reported by BIOS,"
1326 " enabling anyway\n", name, 1 << cm);
1327 eeepc->cm_supported |= 1 << cm;
1331 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1333 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1334 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1335 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1336 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1339 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1341 unsigned int init_flags;
1344 result = acpi_bus_get_status(eeepc->device);
1347 if (!eeepc->device->status.present) {
1348 pr_err("Hotkey device not present, aborting\n");
1352 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1353 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1355 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1356 pr_err("Hotkey initialization failed\n");
1360 /* get control methods supported */
1361 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1362 pr_err("Get control methods supported failed\n");
1366 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1371 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1374 * If the following call to set_acpi() fails, it's because there's no
1375 * camera so we can ignore the error.
1377 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1378 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1381 static bool eeepc_device_present;
1383 static int eeepc_acpi_add(struct acpi_device *device)
1385 struct eeepc_laptop *eeepc;
1388 pr_notice(EEEPC_LAPTOP_NAME "\n");
1389 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1392 eeepc->handle = device->handle;
1393 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1394 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1395 device->driver_data = eeepc;
1396 eeepc->device = device;
1398 eeepc->hotplug_disabled = hotplug_disabled;
1400 eeepc_dmi_check(eeepc);
1402 result = eeepc_acpi_init(eeepc);
1405 eeepc_enable_camera(eeepc);
1408 * Register the platform device first. It is used as a parent for the
1409 * sub-devices below.
1411 * Note that if there are multiple instances of this ACPI device it
1412 * will bail out, because the platform device is registered with a
1413 * fixed name. Of course it doesn't make sense to have more than one,
1414 * and machine-specific scripts find the fixed name convenient. But
1415 * It's also good for us to exclude multiple instances because both
1416 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1417 * (the EC and the wlan PCI slot respectively).
1419 result = eeepc_platform_init(eeepc);
1423 if (!acpi_video_backlight_support()) {
1424 result = eeepc_backlight_init(eeepc);
1426 goto fail_backlight;
1428 pr_info("Backlight controlled by ACPI video driver\n");
1430 result = eeepc_input_init(eeepc);
1434 result = eeepc_hwmon_init(eeepc);
1438 result = eeepc_led_init(eeepc);
1442 result = eeepc_rfkill_init(eeepc);
1446 eeepc_device_present = true;
1450 eeepc_led_exit(eeepc);
1453 eeepc_input_exit(eeepc);
1455 eeepc_backlight_exit(eeepc);
1457 eeepc_platform_exit(eeepc);
1464 static int eeepc_acpi_remove(struct acpi_device *device)
1466 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1468 eeepc_backlight_exit(eeepc);
1469 eeepc_rfkill_exit(eeepc);
1470 eeepc_input_exit(eeepc);
1471 eeepc_led_exit(eeepc);
1472 eeepc_platform_exit(eeepc);
1479 static const struct acpi_device_id eeepc_device_ids[] = {
1480 {EEEPC_ACPI_HID, 0},
1483 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1485 static struct acpi_driver eeepc_acpi_driver = {
1486 .name = EEEPC_LAPTOP_NAME,
1487 .class = EEEPC_ACPI_CLASS,
1488 .owner = THIS_MODULE,
1489 .ids = eeepc_device_ids,
1490 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1492 .add = eeepc_acpi_add,
1493 .remove = eeepc_acpi_remove,
1494 .notify = eeepc_acpi_notify,
1499 static int __init eeepc_laptop_init(void)
1503 result = platform_driver_register(&platform_driver);
1507 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1509 goto fail_acpi_driver;
1511 if (!eeepc_device_present) {
1513 goto fail_no_device;
1519 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1521 platform_driver_unregister(&platform_driver);
1525 static void __exit eeepc_laptop_exit(void)
1527 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1528 platform_driver_unregister(&platform_driver);
1531 module_init(eeepc_laptop_init);
1532 module_exit(eeepc_laptop_exit);