acer-wmi: Add acer wmi hotkey events support
Add acer wmi hotkey event support. Install a wmi notify handler to transfer wmi event key to key code, then send out keycode through acer wmi input device to userland. Signed-off-by: Lee, Chun-Yi <jlee@novell.com> Acked-by: Dmitry Torokhov <dtor@mail.ru> Acked-by: Thomas Renninger <trenn@suse.de> Acked-by: Jiri Benc <jbenc@suse.cz> Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk> Cc: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Matthew Garrett <mjg@redhat.com>
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2 changed files with 141 additions and 0 deletions
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@ -22,8 +22,10 @@ config ACER_WMI
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depends on NEW_LEDS
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depends on BACKLIGHT_CLASS_DEVICE
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depends on SERIO_I8042
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depends on INPUT
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depends on RFKILL || RFKILL = n
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depends on ACPI_WMI
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select INPUT_SPARSEKMAP
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---help---
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This is a driver for newer Acer (and Wistron) laptops. It adds
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wireless radio and bluetooth control, and on some laptops,
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@ -37,6 +37,8 @@
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#include <linux/workqueue.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#include <acpi/acpi_drivers.h>
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@ -48,6 +50,7 @@ MODULE_LICENSE("GPL");
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#define ACER_ERR KERN_ERR ACER_LOGPREFIX
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#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
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#define ACER_INFO KERN_INFO ACER_LOGPREFIX
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#define ACER_WARNING KERN_WARNING ACER_LOGPREFIX
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/*
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* Magic Number
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@ -83,8 +86,39 @@ MODULE_LICENSE("GPL");
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#define WMID_GUID1 "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
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#define WMID_GUID2 "95764E09-FB56-4e83-B31A-37761F60994A"
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/*
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* Acer ACPI event GUIDs
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*/
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#define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
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MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
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MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
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MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
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enum acer_wmi_event_ids {
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WMID_HOTKEY_EVENT = 0x1,
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};
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static const struct key_entry acer_wmi_keymap[] = {
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{KE_KEY, 0x01, {KEY_WLAN} }, /* WiFi */
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{KE_KEY, 0x12, {KEY_BLUETOOTH} }, /* BT */
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{KE_KEY, 0x21, {KEY_PROG1} }, /* Backup */
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{KE_KEY, 0x22, {KEY_PROG2} }, /* Arcade */
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{KE_KEY, 0x23, {KEY_PROG3} }, /* P_Key */
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{KE_KEY, 0x24, {KEY_PROG4} }, /* Social networking_Key */
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{KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
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{KE_KEY, 0x82, {KEY_F22} }, /* Touch Pad On/Off */
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{KE_END, 0}
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};
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static struct input_dev *acer_wmi_input_dev;
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struct event_return_value {
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u8 function;
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u8 key_num;
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u16 device_state;
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u32 reserved;
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} __attribute__((packed));
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/*
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* Interface capability flags
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@ -1085,6 +1119,99 @@ static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
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static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
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static void acer_wmi_notify(u32 value, void *context)
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{
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struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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struct event_return_value return_value;
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acpi_status status;
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status = wmi_get_event_data(value, &response);
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if (status != AE_OK) {
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printk(ACER_WARNING "bad event status 0x%x\n", status);
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return;
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}
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obj = (union acpi_object *)response.pointer;
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if (!obj)
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return;
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if (obj->type != ACPI_TYPE_BUFFER) {
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printk(ACER_WARNING "Unknown response received %d\n",
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obj->type);
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kfree(obj);
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return;
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}
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if (obj->buffer.length != 8) {
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printk(ACER_WARNING "Unknown buffer length %d\n",
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obj->buffer.length);
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kfree(obj);
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return;
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}
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return_value = *((struct event_return_value *)obj->buffer.pointer);
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kfree(obj);
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switch (return_value.function) {
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case WMID_HOTKEY_EVENT:
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if (!sparse_keymap_report_event(acer_wmi_input_dev,
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return_value.key_num, 1, true))
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printk(ACER_WARNING "Unknown key number - 0x%x\n",
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return_value.key_num);
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break;
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default:
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printk(ACER_WARNING "Unknown function number - %d - %d\n",
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return_value.function, return_value.key_num);
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break;
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}
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}
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static int __init acer_wmi_input_setup(void)
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{
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acpi_status status;
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int err;
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acer_wmi_input_dev = input_allocate_device();
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if (!acer_wmi_input_dev)
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return -ENOMEM;
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acer_wmi_input_dev->name = "Acer WMI hotkeys";
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acer_wmi_input_dev->phys = "wmi/input0";
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acer_wmi_input_dev->id.bustype = BUS_HOST;
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err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
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if (err)
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goto err_free_dev;
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status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
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acer_wmi_notify, NULL);
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if (ACPI_FAILURE(status)) {
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err = -EIO;
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goto err_free_keymap;
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}
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err = input_register_device(acer_wmi_input_dev);
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if (err)
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goto err_uninstall_notifier;
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return 0;
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err_uninstall_notifier:
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wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
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err_free_keymap:
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sparse_keymap_free(acer_wmi_input_dev);
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err_free_dev:
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input_free_device(acer_wmi_input_dev);
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return err;
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}
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static void acer_wmi_input_destroy(void)
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{
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wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
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sparse_keymap_free(acer_wmi_input_dev);
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input_unregister_device(acer_wmi_input_dev);
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}
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/*
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* debugfs functions
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*/
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@ -1327,6 +1454,12 @@ static int __init acer_wmi_init(void)
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"generic video driver\n");
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}
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if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
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err = acer_wmi_input_setup();
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if (err)
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return err;
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}
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err = platform_driver_register(&acer_platform_driver);
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if (err) {
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printk(ACER_ERR "Unable to register platform driver.\n");
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@ -1368,11 +1501,17 @@ static int __init acer_wmi_init(void)
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error_device_alloc:
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platform_driver_unregister(&acer_platform_driver);
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error_platform_register:
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if (wmi_has_guid(ACERWMID_EVENT_GUID))
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acer_wmi_input_destroy();
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return err;
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}
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static void __exit acer_wmi_exit(void)
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{
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if (wmi_has_guid(ACERWMID_EVENT_GUID))
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acer_wmi_input_destroy();
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remove_sysfs(acer_platform_device);
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remove_debugfs();
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platform_device_unregister(acer_platform_device);
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