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)
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 = hotplug_slot->private;
719 int val = get_acpi(eeepc, CM_ASL_WLAN);
721 if (val == 1 || val == 0)
729 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
730 .owner = THIS_MODULE,
731 .get_adapter_status = eeepc_get_adapter_status,
732 .get_power_status = eeepc_get_adapter_status,
735 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
738 struct pci_bus *bus = pci_find_bus(0, 1);
741 pr_err("Unable to find wifi PCI bus\n");
745 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
746 if (!eeepc->hotplug_slot)
749 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
751 if (!eeepc->hotplug_slot->info)
754 eeepc->hotplug_slot->private = eeepc;
755 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
756 eeepc_get_adapter_status(eeepc->hotplug_slot,
757 &eeepc->hotplug_slot->info->adapter_status);
759 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
761 pr_err("Unable to register hotplug slot - %d\n", ret);
768 kfree(eeepc->hotplug_slot->info);
770 kfree(eeepc->hotplug_slot);
771 eeepc->hotplug_slot = NULL;
779 static int eeepc_rfkill_set(void *data, bool blocked)
781 acpi_handle handle = data;
783 return write_acpi_int(handle, NULL, !blocked);
786 static const struct rfkill_ops eeepc_rfkill_ops = {
787 .set_block = eeepc_rfkill_set,
790 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
791 struct rfkill **rfkill,
793 enum rfkill_type type, int cm)
798 result = acpi_setter_handle(eeepc, cm, &handle);
802 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
803 &eeepc_rfkill_ops, handle);
808 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
809 result = rfkill_register(*rfkill);
811 rfkill_destroy(*rfkill);
818 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
819 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
820 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
822 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
824 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
825 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
826 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
827 if (eeepc->wlan_rfkill) {
828 rfkill_unregister(eeepc->wlan_rfkill);
829 rfkill_destroy(eeepc->wlan_rfkill);
830 eeepc->wlan_rfkill = NULL;
833 if (eeepc->hotplug_slot) {
834 pci_hp_deregister(eeepc->hotplug_slot);
835 kfree(eeepc->hotplug_slot->info);
836 kfree(eeepc->hotplug_slot);
839 if (eeepc->bluetooth_rfkill) {
840 rfkill_unregister(eeepc->bluetooth_rfkill);
841 rfkill_destroy(eeepc->bluetooth_rfkill);
842 eeepc->bluetooth_rfkill = NULL;
844 if (eeepc->wwan3g_rfkill) {
845 rfkill_unregister(eeepc->wwan3g_rfkill);
846 rfkill_destroy(eeepc->wwan3g_rfkill);
847 eeepc->wwan3g_rfkill = NULL;
849 if (eeepc->wimax_rfkill) {
850 rfkill_unregister(eeepc->wimax_rfkill);
851 rfkill_destroy(eeepc->wimax_rfkill);
852 eeepc->wimax_rfkill = NULL;
856 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
860 mutex_init(&eeepc->hotplug_lock);
862 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
863 "eeepc-wlan", RFKILL_TYPE_WLAN,
866 if (result && result != -ENODEV)
869 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
870 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
873 if (result && result != -ENODEV)
876 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
877 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
880 if (result && result != -ENODEV)
883 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
884 "eeepc-wimax", RFKILL_TYPE_WIMAX,
887 if (result && result != -ENODEV)
890 if (eeepc->hotplug_disabled)
893 result = eeepc_setup_pci_hotplug(eeepc);
895 * If we get -EBUSY then something else is handling the PCI hotplug -
896 * don't fail in this case
898 if (result == -EBUSY)
901 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
902 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
903 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
906 if (result && result != -ENODEV)
907 eeepc_rfkill_exit(eeepc);
912 * Platform driver - hibernate/resume callbacks
914 static int eeepc_hotk_thaw(struct device *device)
916 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
918 if (eeepc->wlan_rfkill) {
922 * Work around bios bug - acpi _PTS turns off the wireless led
923 * during suspend. Normally it restores it on resume, but
924 * we should kick it ourselves in case hibernation is aborted.
926 wlan = get_acpi(eeepc, CM_ASL_WLAN);
928 set_acpi(eeepc, CM_ASL_WLAN, wlan);
934 static int eeepc_hotk_restore(struct device *device)
936 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
938 /* Refresh both wlan rfkill state and pci hotplug */
939 if (eeepc->wlan_rfkill) {
940 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
941 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
942 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
945 if (eeepc->bluetooth_rfkill)
946 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
947 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
948 if (eeepc->wwan3g_rfkill)
949 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
950 get_acpi(eeepc, CM_ASL_3G) != 1);
951 if (eeepc->wimax_rfkill)
952 rfkill_set_sw_state(eeepc->wimax_rfkill,
953 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
958 static const struct dev_pm_ops eeepc_pm_ops = {
959 .thaw = eeepc_hotk_thaw,
960 .restore = eeepc_hotk_restore,
963 static struct platform_driver platform_driver = {
965 .name = EEEPC_LAPTOP_FILE,
974 #define EEEPC_EC_SC00 0x61
975 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
976 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
977 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
979 #define EEEPC_EC_SFB0 0xD0
980 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
982 static inline int eeepc_pwm_to_lmsensors(int value)
984 return value * 255 / 100;
987 static inline int eeepc_lmsensors_to_pwm(int value)
989 value = clamp_val(value, 0, 255);
990 return value * 100 / 255;
993 static int eeepc_get_fan_pwm(void)
997 ec_read(EEEPC_EC_FAN_PWM, &value);
998 return eeepc_pwm_to_lmsensors(value);
1001 static void eeepc_set_fan_pwm(int value)
1003 value = eeepc_lmsensors_to_pwm(value);
1004 ec_write(EEEPC_EC_FAN_PWM, value);
1007 static int eeepc_get_fan_rpm(void)
1012 ec_read(EEEPC_EC_FAN_HRPM, &high);
1013 ec_read(EEEPC_EC_FAN_LRPM, &low);
1014 return high << 8 | low;
1017 #define EEEPC_EC_FAN_CTRL_BIT 0x02
1018 #define EEEPC_FAN_CTRL_MANUAL 1
1019 #define EEEPC_FAN_CTRL_AUTO 2
1021 static int eeepc_get_fan_ctrl(void)
1025 ec_read(EEEPC_EC_FAN_CTRL, &value);
1026 if (value & EEEPC_EC_FAN_CTRL_BIT)
1027 return EEEPC_FAN_CTRL_MANUAL;
1029 return EEEPC_FAN_CTRL_AUTO;
1032 static void eeepc_set_fan_ctrl(int manual)
1036 ec_read(EEEPC_EC_FAN_CTRL, &value);
1037 if (manual == EEEPC_FAN_CTRL_MANUAL)
1038 value |= EEEPC_EC_FAN_CTRL_BIT;
1040 value &= ~EEEPC_EC_FAN_CTRL_BIT;
1041 ec_write(EEEPC_EC_FAN_CTRL, value);
1044 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1048 rv = parse_arg(buf, &value);
1055 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1057 return sprintf(buf, "%d\n", get());
1060 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1061 static ssize_t _name##_show(struct device *dev, \
1062 struct device_attribute *attr, \
1065 return show_sys_hwmon(_get, buf); \
1068 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1069 static ssize_t _name##_store(struct device *dev, \
1070 struct device_attribute *attr, \
1071 const char *buf, size_t count) \
1073 return store_sys_hwmon(_set, buf, count); \
1076 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1077 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1078 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1079 static DEVICE_ATTR_RW(_name)
1081 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1082 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1083 static DEVICE_ATTR_RO(_name)
1085 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1086 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1088 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1089 eeepc_set_fan_ctrl);
1091 static struct attribute *hwmon_attrs[] = {
1092 &dev_attr_pwm1.attr,
1093 &dev_attr_fan1_input.attr,
1094 &dev_attr_pwm1_enable.attr,
1097 ATTRIBUTE_GROUPS(hwmon);
1099 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1101 struct device *dev = &eeepc->platform_device->dev;
1102 struct device *hwmon;
1104 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1106 if (IS_ERR(hwmon)) {
1107 pr_err("Could not register eeepc hwmon device\n");
1108 return PTR_ERR(hwmon);
1116 static int read_brightness(struct backlight_device *bd)
1118 struct eeepc_laptop *eeepc = bl_get_data(bd);
1120 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1123 static int set_brightness(struct backlight_device *bd, int value)
1125 struct eeepc_laptop *eeepc = bl_get_data(bd);
1127 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1130 static int update_bl_status(struct backlight_device *bd)
1132 return set_brightness(bd, bd->props.brightness);
1135 static const struct backlight_ops eeepcbl_ops = {
1136 .get_brightness = read_brightness,
1137 .update_status = update_bl_status,
1140 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1142 struct backlight_device *bd = eeepc->backlight_device;
1143 int old = bd->props.brightness;
1145 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1150 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1152 struct backlight_properties props;
1153 struct backlight_device *bd;
1155 memset(&props, 0, sizeof(struct backlight_properties));
1156 props.type = BACKLIGHT_PLATFORM;
1157 props.max_brightness = 15;
1158 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1159 &eeepc->platform_device->dev, eeepc,
1160 &eeepcbl_ops, &props);
1162 pr_err("Could not register eeepc backlight device\n");
1163 eeepc->backlight_device = NULL;
1166 eeepc->backlight_device = bd;
1167 bd->props.brightness = read_brightness(bd);
1168 bd->props.power = FB_BLANK_UNBLANK;
1169 backlight_update_status(bd);
1173 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1175 backlight_device_unregister(eeepc->backlight_device);
1176 eeepc->backlight_device = NULL;
1181 * Input device (i.e. hotkeys)
1183 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1185 struct input_dev *input;
1188 input = input_allocate_device();
1192 input->name = "Asus EeePC extra buttons";
1193 input->phys = EEEPC_LAPTOP_FILE "/input0";
1194 input->id.bustype = BUS_HOST;
1195 input->dev.parent = &eeepc->platform_device->dev;
1197 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1199 pr_err("Unable to setup input device keymap\n");
1203 error = input_register_device(input);
1205 pr_err("Unable to register input device\n");
1209 eeepc->inputdev = input;
1213 input_free_device(input);
1217 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1219 if (eeepc->inputdev)
1220 input_unregister_device(eeepc->inputdev);
1221 eeepc->inputdev = NULL;
1227 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1229 if (!eeepc->inputdev)
1231 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1232 pr_info("Unknown key %x pressed\n", event);
1235 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1237 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1238 int old_brightness, new_brightness;
1241 if (event > ACPI_MAX_SYS_NOTIFY)
1243 count = eeepc->event_count[event % 128]++;
1244 acpi_bus_generate_netlink_event(device->pnp.device_class,
1245 dev_name(&device->dev), event,
1248 /* Brightness events are special */
1249 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1250 eeepc_input_notify(eeepc, event);
1254 /* Ignore them completely if the acpi video driver is used */
1255 if (!eeepc->backlight_device)
1258 /* Update the backlight device. */
1259 old_brightness = eeepc_backlight_notify(eeepc);
1261 /* Convert event to keypress (obsolescent hack) */
1262 new_brightness = event - NOTIFY_BRN_MIN;
1264 if (new_brightness < old_brightness) {
1265 event = NOTIFY_BRN_MIN; /* brightness down */
1266 } else if (new_brightness > old_brightness) {
1267 event = NOTIFY_BRN_MAX; /* brightness up */
1270 * no change in brightness - already at min/max,
1271 * event will be desired value (or else ignored)
1274 eeepc_input_notify(eeepc, event);
1277 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1281 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1286 * Blacklist for setting cpufv (cpu speed).
1288 * EeePC 4G ("701") implements CFVS, but it is not supported
1289 * by the pre-installed OS, and the original option to change it
1290 * in the BIOS setup screen was removed in later versions.
1292 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1293 * this applies to all "701" models (4G/4G Surf/2G Surf).
1295 * So Asus made a deliberate decision not to support it on this model.
1296 * We have several reports that using it can cause the system to hang
1298 * The hang has also been reported on a "702" (Model name "8G"?).
1300 * We avoid dmi_check_system() / dmi_match(), because they use
1301 * substring matching. We don't want to affect the "701SD"
1302 * and "701SDX" models, because they do support S.H.E.
1304 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1305 eeepc->cpufv_disabled = true;
1306 pr_info("model %s does not officially support setting cpu speed\n",
1308 pr_info("cpufv disabled to avoid instability\n");
1312 * Blacklist for wlan hotplug
1314 * Eeepc 1005HA doesn't work like others models and don't need the
1315 * hotplug code. In fact, current hotplug code seems to unplug another
1318 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1319 strcmp(model, "1005PE") == 0) {
1320 eeepc->hotplug_disabled = true;
1321 pr_info("wlan hotplug disabled\n");
1325 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1329 /* Some BIOSes do not report cm although it is available.
1330 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1331 if (!(eeepc->cm_supported & (1 << cm))
1332 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1333 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1335 eeepc->cm_supported |= 1 << cm;
1339 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1341 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1342 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1343 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1344 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1347 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1349 unsigned int init_flags;
1352 result = acpi_bus_get_status(eeepc->device);
1355 if (!eeepc->device->status.present) {
1356 pr_err("Hotkey device not present, aborting\n");
1360 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1361 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1363 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1364 pr_err("Hotkey initialization failed\n");
1368 /* get control methods supported */
1369 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1370 pr_err("Get control methods supported failed\n");
1374 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1379 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1382 * If the following call to set_acpi() fails, it's because there's no
1383 * camera so we can ignore the error.
1385 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1386 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1389 static bool eeepc_device_present;
1391 static int eeepc_acpi_add(struct acpi_device *device)
1393 struct eeepc_laptop *eeepc;
1396 pr_notice(EEEPC_LAPTOP_NAME "\n");
1397 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1400 eeepc->handle = device->handle;
1401 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1402 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1403 device->driver_data = eeepc;
1404 eeepc->device = device;
1406 eeepc->hotplug_disabled = hotplug_disabled;
1408 eeepc_dmi_check(eeepc);
1410 result = eeepc_acpi_init(eeepc);
1413 eeepc_enable_camera(eeepc);
1416 * Register the platform device first. It is used as a parent for the
1417 * sub-devices below.
1419 * Note that if there are multiple instances of this ACPI device it
1420 * will bail out, because the platform device is registered with a
1421 * fixed name. Of course it doesn't make sense to have more than one,
1422 * and machine-specific scripts find the fixed name convenient. But
1423 * It's also good for us to exclude multiple instances because both
1424 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1425 * (the EC and the wlan PCI slot respectively).
1427 result = eeepc_platform_init(eeepc);
1431 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1432 result = eeepc_backlight_init(eeepc);
1434 goto fail_backlight;
1437 result = eeepc_input_init(eeepc);
1441 result = eeepc_hwmon_init(eeepc);
1445 result = eeepc_led_init(eeepc);
1449 result = eeepc_rfkill_init(eeepc);
1453 eeepc_device_present = true;
1457 eeepc_led_exit(eeepc);
1460 eeepc_input_exit(eeepc);
1462 eeepc_backlight_exit(eeepc);
1464 eeepc_platform_exit(eeepc);
1471 static int eeepc_acpi_remove(struct acpi_device *device)
1473 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1475 eeepc_backlight_exit(eeepc);
1476 eeepc_rfkill_exit(eeepc);
1477 eeepc_input_exit(eeepc);
1478 eeepc_led_exit(eeepc);
1479 eeepc_platform_exit(eeepc);
1486 static const struct acpi_device_id eeepc_device_ids[] = {
1487 {EEEPC_ACPI_HID, 0},
1490 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1492 static struct acpi_driver eeepc_acpi_driver = {
1493 .name = EEEPC_LAPTOP_NAME,
1494 .class = EEEPC_ACPI_CLASS,
1495 .owner = THIS_MODULE,
1496 .ids = eeepc_device_ids,
1497 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1499 .add = eeepc_acpi_add,
1500 .remove = eeepc_acpi_remove,
1501 .notify = eeepc_acpi_notify,
1506 static int __init eeepc_laptop_init(void)
1510 result = platform_driver_register(&platform_driver);
1514 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1516 goto fail_acpi_driver;
1518 if (!eeepc_device_present) {
1520 goto fail_no_device;
1526 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1528 platform_driver_unregister(&platform_driver);
1532 static void __exit eeepc_laptop_exit(void)
1534 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1535 platform_driver_unregister(&platform_driver);
1538 module_init(eeepc_laptop_init);
1539 module_exit(eeepc_laptop_exit);