| /* |
| * HP WMI hotkeys |
| * |
| * Copyright (C) 2008 Red Hat <mjg@redhat.com> |
| * |
| * Portions based on wistron_btns.c: |
| * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> |
| * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> |
| * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/input.h> |
| #include <acpi/acpi_drivers.h> |
| #include <linux/platform_device.h> |
| #include <linux/acpi.h> |
| #include <linux/rfkill.h> |
| #include <linux/string.h> |
| |
| MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>"); |
| MODULE_DESCRIPTION("HP laptop WMI hotkeys driver"); |
| MODULE_LICENSE("GPL"); |
| |
| MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C"); |
| MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); |
| |
| #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C" |
| #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4" |
| |
| #define HPWMI_DISPLAY_QUERY 0x1 |
| #define HPWMI_HDDTEMP_QUERY 0x2 |
| #define HPWMI_ALS_QUERY 0x3 |
| #define HPWMI_HARDWARE_QUERY 0x4 |
| #define HPWMI_WIRELESS_QUERY 0x5 |
| #define HPWMI_HOTKEY_QUERY 0xc |
| |
| static int __init hp_wmi_bios_setup(struct platform_device *device); |
| static int __exit hp_wmi_bios_remove(struct platform_device *device); |
| static int hp_wmi_resume_handler(struct device *device); |
| |
| struct bios_args { |
| u32 signature; |
| u32 command; |
| u32 commandtype; |
| u32 datasize; |
| u32 data; |
| }; |
| |
| struct bios_return { |
| u32 sigpass; |
| u32 return_code; |
| u32 value; |
| }; |
| |
| struct key_entry { |
| char type; /* See KE_* below */ |
| u16 code; |
| u16 keycode; |
| }; |
| |
| enum { KE_KEY, KE_END }; |
| |
| static struct key_entry hp_wmi_keymap[] = { |
| {KE_KEY, 0x02, KEY_BRIGHTNESSUP}, |
| {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN}, |
| {KE_KEY, 0x20e6, KEY_PROG1}, |
| {KE_KEY, 0x2142, KEY_MEDIA}, |
| {KE_KEY, 0x213b, KEY_INFO}, |
| {KE_KEY, 0x231b, KEY_HELP}, |
| {KE_END, 0} |
| }; |
| |
| static struct input_dev *hp_wmi_input_dev; |
| static struct platform_device *hp_wmi_platform_dev; |
| |
| static struct rfkill *wifi_rfkill; |
| static struct rfkill *bluetooth_rfkill; |
| static struct rfkill *wwan_rfkill; |
| |
| static struct dev_pm_ops hp_wmi_pm_ops = { |
| .resume = hp_wmi_resume_handler, |
| .restore = hp_wmi_resume_handler, |
| }; |
| |
| static struct platform_driver hp_wmi_driver = { |
| .driver = { |
| .name = "hp-wmi", |
| .owner = THIS_MODULE, |
| .pm = &hp_wmi_pm_ops, |
| }, |
| .probe = hp_wmi_bios_setup, |
| .remove = hp_wmi_bios_remove, |
| }; |
| |
| static int hp_wmi_perform_query(int query, int write, int value) |
| { |
| struct bios_return bios_return; |
| acpi_status status; |
| union acpi_object *obj; |
| struct bios_args args = { |
| .signature = 0x55434553, |
| .command = write ? 0x2 : 0x1, |
| .commandtype = query, |
| .datasize = write ? 0x4 : 0, |
| .data = value, |
| }; |
| struct acpi_buffer input = { sizeof(struct bios_args), &args }; |
| struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; |
| |
| status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output); |
| |
| obj = output.pointer; |
| |
| if (!obj || obj->type != ACPI_TYPE_BUFFER) |
| return -EINVAL; |
| |
| bios_return = *((struct bios_return *)obj->buffer.pointer); |
| if (bios_return.return_code > 0) |
| return bios_return.return_code * -1; |
| else |
| return bios_return.value; |
| } |
| |
| static int hp_wmi_display_state(void) |
| { |
| return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0); |
| } |
| |
| static int hp_wmi_hddtemp_state(void) |
| { |
| return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0); |
| } |
| |
| static int hp_wmi_als_state(void) |
| { |
| return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0); |
| } |
| |
| static int hp_wmi_dock_state(void) |
| { |
| int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0); |
| |
| if (ret < 0) |
| return ret; |
| |
| return ret & 0x1; |
| } |
| |
| static int hp_wmi_tablet_state(void) |
| { |
| int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0); |
| |
| if (ret < 0) |
| return ret; |
| |
| return (ret & 0x4) ? 1 : 0; |
| } |
| |
| static int hp_wmi_set_block(void *data, bool blocked) |
| { |
| unsigned long b = (unsigned long) data; |
| int query = BIT(b + 8) | ((!blocked) << b); |
| |
| return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query); |
| } |
| |
| static const struct rfkill_ops hp_wmi_rfkill_ops = { |
| .set_block = hp_wmi_set_block, |
| }; |
| |
| static bool hp_wmi_wifi_state(void) |
| { |
| int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); |
| |
| if (wireless & 0x100) |
| return false; |
| else |
| return true; |
| } |
| |
| static bool hp_wmi_bluetooth_state(void) |
| { |
| int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); |
| |
| if (wireless & 0x10000) |
| return false; |
| else |
| return true; |
| } |
| |
| static bool hp_wmi_wwan_state(void) |
| { |
| int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); |
| |
| if (wireless & 0x1000000) |
| return false; |
| else |
| return true; |
| } |
| |
| static ssize_t show_display(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| int value = hp_wmi_display_state(); |
| if (value < 0) |
| return -EINVAL; |
| return sprintf(buf, "%d\n", value); |
| } |
| |
| static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| int value = hp_wmi_hddtemp_state(); |
| if (value < 0) |
| return -EINVAL; |
| return sprintf(buf, "%d\n", value); |
| } |
| |
| static ssize_t show_als(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| int value = hp_wmi_als_state(); |
| if (value < 0) |
| return -EINVAL; |
| return sprintf(buf, "%d\n", value); |
| } |
| |
| static ssize_t show_dock(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| int value = hp_wmi_dock_state(); |
| if (value < 0) |
| return -EINVAL; |
| return sprintf(buf, "%d\n", value); |
| } |
| |
| static ssize_t show_tablet(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| int value = hp_wmi_tablet_state(); |
| if (value < 0) |
| return -EINVAL; |
| return sprintf(buf, "%d\n", value); |
| } |
| |
| static ssize_t set_als(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| u32 tmp = simple_strtoul(buf, NULL, 10); |
| hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp); |
| return count; |
| } |
| |
| static DEVICE_ATTR(display, S_IRUGO, show_display, NULL); |
| static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL); |
| static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als); |
| static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL); |
| static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL); |
| |
| static struct key_entry *hp_wmi_get_entry_by_scancode(int code) |
| { |
| struct key_entry *key; |
| |
| for (key = hp_wmi_keymap; key->type != KE_END; key++) |
| if (code == key->code) |
| return key; |
| |
| return NULL; |
| } |
| |
| static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode) |
| { |
| struct key_entry *key; |
| |
| for (key = hp_wmi_keymap; key->type != KE_END; key++) |
| if (key->type == KE_KEY && keycode == key->keycode) |
| return key; |
| |
| return NULL; |
| } |
| |
| static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode) |
| { |
| struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode); |
| |
| if (key && key->type == KE_KEY) { |
| *keycode = key->keycode; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) |
| { |
| struct key_entry *key; |
| int old_keycode; |
| |
| if (keycode < 0 || keycode > KEY_MAX) |
| return -EINVAL; |
| |
| key = hp_wmi_get_entry_by_scancode(scancode); |
| if (key && key->type == KE_KEY) { |
| old_keycode = key->keycode; |
| key->keycode = keycode; |
| set_bit(keycode, dev->keybit); |
| if (!hp_wmi_get_entry_by_keycode(old_keycode)) |
| clear_bit(old_keycode, dev->keybit); |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static void hp_wmi_notify(u32 value, void *context) |
| { |
| struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; |
| static struct key_entry *key; |
| union acpi_object *obj; |
| |
| wmi_get_event_data(value, &response); |
| |
| obj = (union acpi_object *)response.pointer; |
| |
| if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) { |
| int eventcode = *((u8 *) obj->buffer.pointer); |
| if (eventcode == 0x4) |
| eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0, |
| 0); |
| key = hp_wmi_get_entry_by_scancode(eventcode); |
| if (key) { |
| switch (key->type) { |
| case KE_KEY: |
| input_report_key(hp_wmi_input_dev, |
| key->keycode, 1); |
| input_sync(hp_wmi_input_dev); |
| input_report_key(hp_wmi_input_dev, |
| key->keycode, 0); |
| input_sync(hp_wmi_input_dev); |
| break; |
| } |
| } else if (eventcode == 0x1) { |
| input_report_switch(hp_wmi_input_dev, SW_DOCK, |
| hp_wmi_dock_state()); |
| input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, |
| hp_wmi_tablet_state()); |
| input_sync(hp_wmi_input_dev); |
| } else if (eventcode == 0x5) { |
| if (wifi_rfkill) |
| rfkill_set_sw_state(wifi_rfkill, |
| hp_wmi_wifi_state()); |
| if (bluetooth_rfkill) |
| rfkill_set_sw_state(bluetooth_rfkill, |
| hp_wmi_bluetooth_state()); |
| if (wwan_rfkill) |
| rfkill_set_sw_state(wwan_rfkill, |
| hp_wmi_wwan_state()); |
| } else |
| printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n", |
| eventcode); |
| } else |
| printk(KERN_INFO "HP WMI: Unknown response received\n"); |
| } |
| |
| static int __init hp_wmi_input_setup(void) |
| { |
| struct key_entry *key; |
| int err; |
| |
| hp_wmi_input_dev = input_allocate_device(); |
| |
| hp_wmi_input_dev->name = "HP WMI hotkeys"; |
| hp_wmi_input_dev->phys = "wmi/input0"; |
| hp_wmi_input_dev->id.bustype = BUS_HOST; |
| hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode; |
| hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode; |
| |
| for (key = hp_wmi_keymap; key->type != KE_END; key++) { |
| switch (key->type) { |
| case KE_KEY: |
| set_bit(EV_KEY, hp_wmi_input_dev->evbit); |
| set_bit(key->keycode, hp_wmi_input_dev->keybit); |
| break; |
| } |
| } |
| |
| set_bit(EV_SW, hp_wmi_input_dev->evbit); |
| set_bit(SW_DOCK, hp_wmi_input_dev->swbit); |
| set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit); |
| |
| /* Set initial hardware state */ |
| input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state()); |
| input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, |
| hp_wmi_tablet_state()); |
| input_sync(hp_wmi_input_dev); |
| |
| err = input_register_device(hp_wmi_input_dev); |
| |
| if (err) { |
| input_free_device(hp_wmi_input_dev); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static void cleanup_sysfs(struct platform_device *device) |
| { |
| device_remove_file(&device->dev, &dev_attr_display); |
| device_remove_file(&device->dev, &dev_attr_hddtemp); |
| device_remove_file(&device->dev, &dev_attr_als); |
| device_remove_file(&device->dev, &dev_attr_dock); |
| device_remove_file(&device->dev, &dev_attr_tablet); |
| } |
| |
| static int __init hp_wmi_bios_setup(struct platform_device *device) |
| { |
| int err; |
| int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); |
| |
| err = device_create_file(&device->dev, &dev_attr_display); |
| if (err) |
| goto add_sysfs_error; |
| err = device_create_file(&device->dev, &dev_attr_hddtemp); |
| if (err) |
| goto add_sysfs_error; |
| err = device_create_file(&device->dev, &dev_attr_als); |
| if (err) |
| goto add_sysfs_error; |
| err = device_create_file(&device->dev, &dev_attr_dock); |
| if (err) |
| goto add_sysfs_error; |
| err = device_create_file(&device->dev, &dev_attr_tablet); |
| if (err) |
| goto add_sysfs_error; |
| |
| if (wireless & 0x1) { |
| wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev, |
| RFKILL_TYPE_WLAN, |
| &hp_wmi_rfkill_ops, |
| (void *) 0); |
| err = rfkill_register(wifi_rfkill); |
| if (err) |
| goto register_wifi_error; |
| } |
| |
| if (wireless & 0x2) { |
| bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev, |
| RFKILL_TYPE_BLUETOOTH, |
| &hp_wmi_rfkill_ops, |
| (void *) 1); |
| err = rfkill_register(bluetooth_rfkill); |
| if (err) |
| goto register_bluetooth_error; |
| } |
| |
| if (wireless & 0x4) { |
| wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev, |
| RFKILL_TYPE_WWAN, |
| &hp_wmi_rfkill_ops, |
| (void *) 2); |
| err = rfkill_register(wwan_rfkill); |
| if (err) |
| goto register_wwan_err; |
| } |
| |
| return 0; |
| register_wwan_err: |
| rfkill_destroy(wwan_rfkill); |
| if (bluetooth_rfkill) |
| rfkill_unregister(bluetooth_rfkill); |
| register_bluetooth_error: |
| rfkill_destroy(bluetooth_rfkill); |
| if (wifi_rfkill) |
| rfkill_unregister(wifi_rfkill); |
| register_wifi_error: |
| rfkill_destroy(wifi_rfkill); |
| add_sysfs_error: |
| cleanup_sysfs(device); |
| return err; |
| } |
| |
| static int __exit hp_wmi_bios_remove(struct platform_device *device) |
| { |
| cleanup_sysfs(device); |
| |
| if (wifi_rfkill) { |
| rfkill_unregister(wifi_rfkill); |
| rfkill_destroy(wifi_rfkill); |
| } |
| if (bluetooth_rfkill) { |
| rfkill_unregister(bluetooth_rfkill); |
| rfkill_destroy(bluetooth_rfkill); |
| } |
| if (wwan_rfkill) { |
| rfkill_unregister(wwan_rfkill); |
| rfkill_destroy(wwan_rfkill); |
| } |
| |
| return 0; |
| } |
| |
| static int hp_wmi_resume_handler(struct device *device) |
| { |
| /* |
| * Hardware state may have changed while suspended, so trigger |
| * input events for the current state. As this is a switch, |
| * the input layer will only actually pass it on if the state |
| * changed. |
| */ |
| if (hp_wmi_input_dev) { |
| input_report_switch(hp_wmi_input_dev, SW_DOCK, |
| hp_wmi_dock_state()); |
| input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, |
| hp_wmi_tablet_state()); |
| input_sync(hp_wmi_input_dev); |
| } |
| |
| return 0; |
| } |
| |
| static int __init hp_wmi_init(void) |
| { |
| int err; |
| |
| if (wmi_has_guid(HPWMI_EVENT_GUID)) { |
| err = wmi_install_notify_handler(HPWMI_EVENT_GUID, |
| hp_wmi_notify, NULL); |
| if (!err) |
| hp_wmi_input_setup(); |
| } |
| |
| if (wmi_has_guid(HPWMI_BIOS_GUID)) { |
| err = platform_driver_register(&hp_wmi_driver); |
| if (err) |
| return 0; |
| hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1); |
| if (!hp_wmi_platform_dev) { |
| platform_driver_unregister(&hp_wmi_driver); |
| return 0; |
| } |
| platform_device_add(hp_wmi_platform_dev); |
| } |
| |
| return 0; |
| } |
| |
| static void __exit hp_wmi_exit(void) |
| { |
| if (wmi_has_guid(HPWMI_EVENT_GUID)) { |
| wmi_remove_notify_handler(HPWMI_EVENT_GUID); |
| input_unregister_device(hp_wmi_input_dev); |
| } |
| if (hp_wmi_platform_dev) { |
| platform_device_del(hp_wmi_platform_dev); |
| platform_driver_unregister(&hp_wmi_driver); |
| } |
| } |
| |
| module_init(hp_wmi_init); |
| module_exit(hp_wmi_exit); |