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>
40 #include <acpi/video.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 } },
153 { KE_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */
154 { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */
159 * This is the main structure, we can use it to store useful information
161 struct eeepc_laptop {
162 acpi_handle handle; /* the handle of the acpi device */
163 u32 cm_supported; /* the control methods supported
166 bool hotplug_disabled;
167 u16 event_count[128]; /* count for each event */
169 struct platform_device *platform_device;
170 struct acpi_device *device; /* the device we are in */
171 struct backlight_device *backlight_device;
173 struct input_dev *inputdev;
175 struct rfkill *wlan_rfkill;
176 struct rfkill *bluetooth_rfkill;
177 struct rfkill *wwan3g_rfkill;
178 struct rfkill *wimax_rfkill;
180 struct hotplug_slot hotplug_slot;
181 struct mutex hotplug_lock;
183 struct led_classdev tpd_led;
185 struct workqueue_struct *led_workqueue;
186 struct work_struct tpd_led_work;
192 static int write_acpi_int(acpi_handle handle, const char *method, int val)
196 status = acpi_execute_simple_method(handle, (char *)method, val);
198 return (status == AE_OK ? 0 : -1);
201 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
204 unsigned long long result;
206 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
207 if (ACPI_FAILURE(status)) {
216 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
218 const char *method = cm_setv[cm];
222 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
225 if (write_acpi_int(eeepc->handle, method, value))
226 pr_warn("Error writing %s\n", method);
230 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
232 const char *method = cm_getv[cm];
237 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
240 if (read_acpi_int(eeepc->handle, method, &value))
241 pr_warn("Error reading %s\n", method);
245 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
248 const char *method = cm_setv[cm];
253 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
256 status = acpi_get_handle(eeepc->handle, (char *)method,
258 if (status != AE_OK) {
259 pr_warn("Error finding %s\n", method);
269 static int parse_arg(const char *buf, int *val)
271 if (sscanf(buf, "%i", val) != 1)
276 static ssize_t store_sys_acpi(struct device *dev, int cm,
277 const char *buf, size_t count)
279 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
282 rv = parse_arg(buf, &value);
285 rv = set_acpi(eeepc, cm, value);
291 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
293 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
294 int value = get_acpi(eeepc, cm);
298 return sprintf(buf, "%d\n", value);
301 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
302 static ssize_t _name##_show(struct device *dev, \
303 struct device_attribute *attr, \
306 return show_sys_acpi(dev, _cm, buf); \
309 #define EEEPC_ACPI_STORE_FUNC(_name, _cm) \
310 static ssize_t _name##_store(struct device *dev, \
311 struct device_attribute *attr, \
312 const char *buf, size_t count) \
314 return store_sys_acpi(dev, _cm, buf, count); \
317 #define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \
318 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
319 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
320 static DEVICE_ATTR_RW(_name)
322 #define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \
323 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
324 static DEVICE_ATTR_WO(_name)
326 EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
327 EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
328 EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH);
335 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
337 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
341 c->num = (c->cur >> 8) & 0xff;
343 if (c->num == 0 || c->num > 12)
348 static ssize_t available_cpufv_show(struct device *dev,
349 struct device_attribute *attr,
352 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
353 struct eeepc_cpufv c;
357 if (get_cpufv(eeepc, &c))
359 for (i = 0; i < c.num; i++)
360 len += sprintf(buf + len, "%d ", i);
361 len += sprintf(buf + len, "\n");
365 static ssize_t cpufv_show(struct device *dev,
366 struct device_attribute *attr,
369 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
370 struct eeepc_cpufv c;
372 if (get_cpufv(eeepc, &c))
374 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
377 static ssize_t cpufv_store(struct device *dev,
378 struct device_attribute *attr,
379 const char *buf, size_t count)
381 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
382 struct eeepc_cpufv c;
385 if (eeepc->cpufv_disabled)
387 if (get_cpufv(eeepc, &c))
389 rv = parse_arg(buf, &value);
392 if (value < 0 || value >= c.num)
394 rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
400 static ssize_t cpufv_disabled_show(struct device *dev,
401 struct device_attribute *attr,
404 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
406 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
409 static ssize_t cpufv_disabled_store(struct device *dev,
410 struct device_attribute *attr,
411 const char *buf, size_t count)
413 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
416 rv = parse_arg(buf, &value);
422 if (eeepc->cpufv_disabled)
423 pr_warn("cpufv enabled (not officially supported on this model)\n");
424 eeepc->cpufv_disabled = false;
434 static DEVICE_ATTR_RW(cpufv);
435 static DEVICE_ATTR_RO(available_cpufv);
436 static DEVICE_ATTR_RW(cpufv_disabled);
438 static struct attribute *platform_attributes[] = {
439 &dev_attr_camera.attr,
440 &dev_attr_cardr.attr,
442 &dev_attr_cpufv.attr,
443 &dev_attr_available_cpufv.attr,
444 &dev_attr_cpufv_disabled.attr,
448 static const struct attribute_group platform_attribute_group = {
449 .attrs = platform_attributes
452 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
456 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
457 if (!eeepc->platform_device)
459 platform_set_drvdata(eeepc->platform_device, eeepc);
461 result = platform_device_add(eeepc->platform_device);
463 goto fail_platform_device;
465 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
466 &platform_attribute_group);
472 platform_device_del(eeepc->platform_device);
473 fail_platform_device:
474 platform_device_put(eeepc->platform_device);
478 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
480 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
481 &platform_attribute_group);
482 platform_device_unregister(eeepc->platform_device);
489 * These functions actually update the LED's, and are called from a
490 * workqueue. By doing this as separate work rather than when the LED
491 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
492 * potentially bad time, such as a timer interrupt.
494 static void tpd_led_update(struct work_struct *work)
496 struct eeepc_laptop *eeepc;
498 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
500 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
503 static void tpd_led_set(struct led_classdev *led_cdev,
504 enum led_brightness value)
506 struct eeepc_laptop *eeepc;
508 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
510 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
511 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
514 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
516 struct eeepc_laptop *eeepc;
518 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
520 return get_acpi(eeepc, CM_ASL_TPD);
523 static int eeepc_led_init(struct eeepc_laptop *eeepc)
527 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
530 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
531 if (!eeepc->led_workqueue)
533 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
535 eeepc->tpd_led.name = "eeepc::touchpad";
536 eeepc->tpd_led.brightness_set = tpd_led_set;
537 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
538 eeepc->tpd_led.brightness_get = tpd_led_get;
539 eeepc->tpd_led.max_brightness = 1;
541 rv = led_classdev_register(&eeepc->platform_device->dev,
544 destroy_workqueue(eeepc->led_workqueue);
551 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
553 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
554 led_classdev_unregister(&eeepc->tpd_led);
555 if (eeepc->led_workqueue)
556 destroy_workqueue(eeepc->led_workqueue);
561 * PCI hotplug (for wlan rfkill)
563 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
565 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
570 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
572 struct pci_dev *port;
575 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
579 if (eeepc->wlan_rfkill)
580 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
582 mutex_lock(&eeepc->hotplug_lock);
583 pci_lock_rescan_remove();
585 if (!eeepc->hotplug_slot.ops)
588 port = acpi_get_pci_dev(handle);
590 pr_warning("Unable to find port\n");
594 bus = port->subordinate;
597 pr_warn("Unable to find PCI bus 1?\n");
601 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
602 pr_err("Unable to read PCI config space?\n");
606 absent = (l == 0xffffffff);
608 if (blocked != absent) {
609 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
610 blocked ? "blocked" : "unblocked",
611 absent ? "absent" : "present");
612 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
617 dev = pci_get_slot(bus, 0);
619 /* Device already present */
623 dev = pci_scan_single_device(bus, 0);
625 pci_bus_assign_resources(bus);
626 pci_bus_add_device(dev);
629 dev = pci_get_slot(bus, 0);
631 pci_stop_and_remove_bus_device(dev);
639 pci_unlock_rescan_remove();
640 mutex_unlock(&eeepc->hotplug_lock);
643 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
645 acpi_status status = AE_OK;
648 status = acpi_get_handle(NULL, node, &handle);
650 if (ACPI_SUCCESS(status))
651 eeepc_rfkill_hotplug(eeepc, handle);
654 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
656 struct eeepc_laptop *eeepc = data;
658 if (event != ACPI_NOTIFY_BUS_CHECK)
661 eeepc_rfkill_hotplug(eeepc, handle);
664 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
670 status = acpi_get_handle(NULL, node, &handle);
672 if (ACPI_FAILURE(status))
675 status = acpi_install_notify_handler(handle,
679 if (ACPI_FAILURE(status))
680 pr_warn("Failed to register notify on %s\n", node);
683 * Refresh pci hotplug in case the rfkill state was
684 * changed during setup.
686 eeepc_rfkill_hotplug(eeepc, handle);
690 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
693 acpi_status status = AE_OK;
696 status = acpi_get_handle(NULL, node, &handle);
698 if (ACPI_FAILURE(status))
701 status = acpi_remove_notify_handler(handle,
703 eeepc_rfkill_notify);
704 if (ACPI_FAILURE(status))
705 pr_err("Error removing rfkill notify handler %s\n",
708 * Refresh pci hotplug in case the rfkill
709 * state was changed after
710 * eeepc_unregister_rfkill_notifier()
712 eeepc_rfkill_hotplug(eeepc, handle);
715 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
718 struct eeepc_laptop *eeepc;
721 eeepc = container_of(hotplug_slot, struct eeepc_laptop, hotplug_slot);
722 val = get_acpi(eeepc, CM_ASL_WLAN);
724 if (val == 1 || val == 0)
732 static const struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
733 .get_adapter_status = eeepc_get_adapter_status,
734 .get_power_status = eeepc_get_adapter_status,
737 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
740 struct pci_bus *bus = pci_find_bus(0, 1);
743 pr_err("Unable to find wifi PCI bus\n");
747 eeepc->hotplug_slot.ops = &eeepc_hotplug_slot_ops;
749 ret = pci_hp_register(&eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
751 pr_err("Unable to register hotplug slot - %d\n", ret);
758 eeepc->hotplug_slot.ops = NULL;
765 static int eeepc_rfkill_set(void *data, bool blocked)
767 acpi_handle handle = data;
769 return write_acpi_int(handle, NULL, !blocked);
772 static const struct rfkill_ops eeepc_rfkill_ops = {
773 .set_block = eeepc_rfkill_set,
776 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
777 struct rfkill **rfkill,
779 enum rfkill_type type, int cm)
784 result = acpi_setter_handle(eeepc, cm, &handle);
788 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
789 &eeepc_rfkill_ops, handle);
794 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
795 result = rfkill_register(*rfkill);
797 rfkill_destroy(*rfkill);
804 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
805 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
806 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
808 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
810 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
811 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
812 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
813 if (eeepc->wlan_rfkill) {
814 rfkill_unregister(eeepc->wlan_rfkill);
815 rfkill_destroy(eeepc->wlan_rfkill);
816 eeepc->wlan_rfkill = NULL;
819 if (eeepc->hotplug_slot.ops)
820 pci_hp_deregister(&eeepc->hotplug_slot);
822 if (eeepc->bluetooth_rfkill) {
823 rfkill_unregister(eeepc->bluetooth_rfkill);
824 rfkill_destroy(eeepc->bluetooth_rfkill);
825 eeepc->bluetooth_rfkill = NULL;
827 if (eeepc->wwan3g_rfkill) {
828 rfkill_unregister(eeepc->wwan3g_rfkill);
829 rfkill_destroy(eeepc->wwan3g_rfkill);
830 eeepc->wwan3g_rfkill = NULL;
832 if (eeepc->wimax_rfkill) {
833 rfkill_unregister(eeepc->wimax_rfkill);
834 rfkill_destroy(eeepc->wimax_rfkill);
835 eeepc->wimax_rfkill = NULL;
839 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
843 mutex_init(&eeepc->hotplug_lock);
845 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
846 "eeepc-wlan", RFKILL_TYPE_WLAN,
849 if (result && result != -ENODEV)
852 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
853 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
856 if (result && result != -ENODEV)
859 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
860 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
863 if (result && result != -ENODEV)
866 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
867 "eeepc-wimax", RFKILL_TYPE_WIMAX,
870 if (result && result != -ENODEV)
873 if (eeepc->hotplug_disabled)
876 result = eeepc_setup_pci_hotplug(eeepc);
878 * If we get -EBUSY then something else is handling the PCI hotplug -
879 * don't fail in this case
881 if (result == -EBUSY)
884 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
885 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
886 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
889 if (result && result != -ENODEV)
890 eeepc_rfkill_exit(eeepc);
895 * Platform driver - hibernate/resume callbacks
897 static int eeepc_hotk_thaw(struct device *device)
899 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
901 if (eeepc->wlan_rfkill) {
905 * Work around bios bug - acpi _PTS turns off the wireless led
906 * during suspend. Normally it restores it on resume, but
907 * we should kick it ourselves in case hibernation is aborted.
909 wlan = get_acpi(eeepc, CM_ASL_WLAN);
911 set_acpi(eeepc, CM_ASL_WLAN, wlan);
917 static int eeepc_hotk_restore(struct device *device)
919 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
921 /* Refresh both wlan rfkill state and pci hotplug */
922 if (eeepc->wlan_rfkill) {
923 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
924 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
925 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
928 if (eeepc->bluetooth_rfkill)
929 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
930 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
931 if (eeepc->wwan3g_rfkill)
932 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
933 get_acpi(eeepc, CM_ASL_3G) != 1);
934 if (eeepc->wimax_rfkill)
935 rfkill_set_sw_state(eeepc->wimax_rfkill,
936 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
941 static const struct dev_pm_ops eeepc_pm_ops = {
942 .thaw = eeepc_hotk_thaw,
943 .restore = eeepc_hotk_restore,
946 static struct platform_driver platform_driver = {
948 .name = EEEPC_LAPTOP_FILE,
957 #define EEEPC_EC_SC00 0x61
958 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
959 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
960 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
962 #define EEEPC_EC_SFB0 0xD0
963 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
965 static inline int eeepc_pwm_to_lmsensors(int value)
967 return value * 255 / 100;
970 static inline int eeepc_lmsensors_to_pwm(int value)
972 value = clamp_val(value, 0, 255);
973 return value * 100 / 255;
976 static int eeepc_get_fan_pwm(void)
980 ec_read(EEEPC_EC_FAN_PWM, &value);
981 return eeepc_pwm_to_lmsensors(value);
984 static void eeepc_set_fan_pwm(int value)
986 value = eeepc_lmsensors_to_pwm(value);
987 ec_write(EEEPC_EC_FAN_PWM, value);
990 static int eeepc_get_fan_rpm(void)
995 ec_read(EEEPC_EC_FAN_HRPM, &high);
996 ec_read(EEEPC_EC_FAN_LRPM, &low);
997 return high << 8 | low;
1000 #define EEEPC_EC_FAN_CTRL_BIT 0x02
1001 #define EEEPC_FAN_CTRL_MANUAL 1
1002 #define EEEPC_FAN_CTRL_AUTO 2
1004 static int eeepc_get_fan_ctrl(void)
1008 ec_read(EEEPC_EC_FAN_CTRL, &value);
1009 if (value & EEEPC_EC_FAN_CTRL_BIT)
1010 return EEEPC_FAN_CTRL_MANUAL;
1012 return EEEPC_FAN_CTRL_AUTO;
1015 static void eeepc_set_fan_ctrl(int manual)
1019 ec_read(EEEPC_EC_FAN_CTRL, &value);
1020 if (manual == EEEPC_FAN_CTRL_MANUAL)
1021 value |= EEEPC_EC_FAN_CTRL_BIT;
1023 value &= ~EEEPC_EC_FAN_CTRL_BIT;
1024 ec_write(EEEPC_EC_FAN_CTRL, value);
1027 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1031 rv = parse_arg(buf, &value);
1038 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1040 return sprintf(buf, "%d\n", get());
1043 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1044 static ssize_t _name##_show(struct device *dev, \
1045 struct device_attribute *attr, \
1048 return show_sys_hwmon(_get, buf); \
1051 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1052 static ssize_t _name##_store(struct device *dev, \
1053 struct device_attribute *attr, \
1054 const char *buf, size_t count) \
1056 return store_sys_hwmon(_set, buf, count); \
1059 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1060 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1061 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1062 static DEVICE_ATTR_RW(_name)
1064 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1065 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1066 static DEVICE_ATTR_RO(_name)
1068 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1069 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1071 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1072 eeepc_set_fan_ctrl);
1074 static struct attribute *hwmon_attrs[] = {
1075 &dev_attr_pwm1.attr,
1076 &dev_attr_fan1_input.attr,
1077 &dev_attr_pwm1_enable.attr,
1080 ATTRIBUTE_GROUPS(hwmon);
1082 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1084 struct device *dev = &eeepc->platform_device->dev;
1085 struct device *hwmon;
1087 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1089 if (IS_ERR(hwmon)) {
1090 pr_err("Could not register eeepc hwmon device\n");
1091 return PTR_ERR(hwmon);
1099 static int read_brightness(struct backlight_device *bd)
1101 struct eeepc_laptop *eeepc = bl_get_data(bd);
1103 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1106 static int set_brightness(struct backlight_device *bd, int value)
1108 struct eeepc_laptop *eeepc = bl_get_data(bd);
1110 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1113 static int update_bl_status(struct backlight_device *bd)
1115 return set_brightness(bd, bd->props.brightness);
1118 static const struct backlight_ops eeepcbl_ops = {
1119 .get_brightness = read_brightness,
1120 .update_status = update_bl_status,
1123 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1125 struct backlight_device *bd = eeepc->backlight_device;
1126 int old = bd->props.brightness;
1128 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1133 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1135 struct backlight_properties props;
1136 struct backlight_device *bd;
1138 memset(&props, 0, sizeof(struct backlight_properties));
1139 props.type = BACKLIGHT_PLATFORM;
1140 props.max_brightness = 15;
1141 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1142 &eeepc->platform_device->dev, eeepc,
1143 &eeepcbl_ops, &props);
1145 pr_err("Could not register eeepc backlight device\n");
1146 eeepc->backlight_device = NULL;
1149 eeepc->backlight_device = bd;
1150 bd->props.brightness = read_brightness(bd);
1151 bd->props.power = FB_BLANK_UNBLANK;
1152 backlight_update_status(bd);
1156 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1158 backlight_device_unregister(eeepc->backlight_device);
1159 eeepc->backlight_device = NULL;
1164 * Input device (i.e. hotkeys)
1166 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1168 struct input_dev *input;
1171 input = input_allocate_device();
1175 input->name = "Asus EeePC extra buttons";
1176 input->phys = EEEPC_LAPTOP_FILE "/input0";
1177 input->id.bustype = BUS_HOST;
1178 input->dev.parent = &eeepc->platform_device->dev;
1180 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1182 pr_err("Unable to setup input device keymap\n");
1186 error = input_register_device(input);
1188 pr_err("Unable to register input device\n");
1192 eeepc->inputdev = input;
1196 input_free_device(input);
1200 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1202 if (eeepc->inputdev)
1203 input_unregister_device(eeepc->inputdev);
1204 eeepc->inputdev = NULL;
1210 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1212 if (!eeepc->inputdev)
1214 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1215 pr_info("Unknown key %x pressed\n", event);
1218 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1220 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1221 int old_brightness, new_brightness;
1224 if (event > ACPI_MAX_SYS_NOTIFY)
1226 count = eeepc->event_count[event % 128]++;
1227 acpi_bus_generate_netlink_event(device->pnp.device_class,
1228 dev_name(&device->dev), event,
1231 /* Brightness events are special */
1232 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1233 eeepc_input_notify(eeepc, event);
1237 /* Ignore them completely if the acpi video driver is used */
1238 if (!eeepc->backlight_device)
1241 /* Update the backlight device. */
1242 old_brightness = eeepc_backlight_notify(eeepc);
1244 /* Convert event to keypress (obsolescent hack) */
1245 new_brightness = event - NOTIFY_BRN_MIN;
1247 if (new_brightness < old_brightness) {
1248 event = NOTIFY_BRN_MIN; /* brightness down */
1249 } else if (new_brightness > old_brightness) {
1250 event = NOTIFY_BRN_MAX; /* brightness up */
1253 * no change in brightness - already at min/max,
1254 * event will be desired value (or else ignored)
1257 eeepc_input_notify(eeepc, event);
1260 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1264 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1269 * Blacklist for setting cpufv (cpu speed).
1271 * EeePC 4G ("701") implements CFVS, but it is not supported
1272 * by the pre-installed OS, and the original option to change it
1273 * in the BIOS setup screen was removed in later versions.
1275 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1276 * this applies to all "701" models (4G/4G Surf/2G Surf).
1278 * So Asus made a deliberate decision not to support it on this model.
1279 * We have several reports that using it can cause the system to hang
1281 * The hang has also been reported on a "702" (Model name "8G"?).
1283 * We avoid dmi_check_system() / dmi_match(), because they use
1284 * substring matching. We don't want to affect the "701SD"
1285 * and "701SDX" models, because they do support S.H.E.
1287 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1288 eeepc->cpufv_disabled = true;
1289 pr_info("model %s does not officially support setting cpu speed\n",
1291 pr_info("cpufv disabled to avoid instability\n");
1295 * Blacklist for wlan hotplug
1297 * Eeepc 1005HA doesn't work like others models and don't need the
1298 * hotplug code. In fact, current hotplug code seems to unplug another
1301 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1302 strcmp(model, "1005PE") == 0) {
1303 eeepc->hotplug_disabled = true;
1304 pr_info("wlan hotplug disabled\n");
1308 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1312 /* Some BIOSes do not report cm although it is available.
1313 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1314 if (!(eeepc->cm_supported & (1 << cm))
1315 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1316 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1318 eeepc->cm_supported |= 1 << cm;
1322 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1324 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1325 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1326 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1327 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1330 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1332 unsigned int init_flags;
1335 result = acpi_bus_get_status(eeepc->device);
1338 if (!eeepc->device->status.present) {
1339 pr_err("Hotkey device not present, aborting\n");
1343 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1344 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1346 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1347 pr_err("Hotkey initialization failed\n");
1351 /* get control methods supported */
1352 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1353 pr_err("Get control methods supported failed\n");
1357 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1362 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1365 * If the following call to set_acpi() fails, it's because there's no
1366 * camera so we can ignore the error.
1368 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1369 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1372 static bool eeepc_device_present;
1374 static int eeepc_acpi_add(struct acpi_device *device)
1376 struct eeepc_laptop *eeepc;
1379 pr_notice(EEEPC_LAPTOP_NAME "\n");
1380 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1383 eeepc->handle = device->handle;
1384 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1385 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1386 device->driver_data = eeepc;
1387 eeepc->device = device;
1389 eeepc->hotplug_disabled = hotplug_disabled;
1391 eeepc_dmi_check(eeepc);
1393 result = eeepc_acpi_init(eeepc);
1396 eeepc_enable_camera(eeepc);
1399 * Register the platform device first. It is used as a parent for the
1400 * sub-devices below.
1402 * Note that if there are multiple instances of this ACPI device it
1403 * will bail out, because the platform device is registered with a
1404 * fixed name. Of course it doesn't make sense to have more than one,
1405 * and machine-specific scripts find the fixed name convenient. But
1406 * It's also good for us to exclude multiple instances because both
1407 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1408 * (the EC and the wlan PCI slot respectively).
1410 result = eeepc_platform_init(eeepc);
1414 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1415 result = eeepc_backlight_init(eeepc);
1417 goto fail_backlight;
1420 result = eeepc_input_init(eeepc);
1424 result = eeepc_hwmon_init(eeepc);
1428 result = eeepc_led_init(eeepc);
1432 result = eeepc_rfkill_init(eeepc);
1436 eeepc_device_present = true;
1440 eeepc_led_exit(eeepc);
1443 eeepc_input_exit(eeepc);
1445 eeepc_backlight_exit(eeepc);
1447 eeepc_platform_exit(eeepc);
1454 static int eeepc_acpi_remove(struct acpi_device *device)
1456 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1458 eeepc_backlight_exit(eeepc);
1459 eeepc_rfkill_exit(eeepc);
1460 eeepc_input_exit(eeepc);
1461 eeepc_led_exit(eeepc);
1462 eeepc_platform_exit(eeepc);
1469 static const struct acpi_device_id eeepc_device_ids[] = {
1470 {EEEPC_ACPI_HID, 0},
1473 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1475 static struct acpi_driver eeepc_acpi_driver = {
1476 .name = EEEPC_LAPTOP_NAME,
1477 .class = EEEPC_ACPI_CLASS,
1478 .owner = THIS_MODULE,
1479 .ids = eeepc_device_ids,
1480 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1482 .add = eeepc_acpi_add,
1483 .remove = eeepc_acpi_remove,
1484 .notify = eeepc_acpi_notify,
1489 static int __init eeepc_laptop_init(void)
1493 result = platform_driver_register(&platform_driver);
1497 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1499 goto fail_acpi_driver;
1501 if (!eeepc_device_present) {
1503 goto fail_no_device;
1509 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1511 platform_driver_unregister(&platform_driver);
1515 static void __exit eeepc_laptop_exit(void)
1517 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1518 platform_driver_unregister(&platform_driver);
1521 module_init(eeepc_laptop_init);
1522 module_exit(eeepc_laptop_exit);