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 <[email protected]> --- drivers/platform/x86/Kconfig | 1 + drivers/platform/x86/acer-wmi.c | 213 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 214 insertions(+), 0 deletions(-) diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index cff7cc2..76cdf64 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -23,6 +23,7 @@ config ACER_WMI depends on BACKLIGHT_CLASS_DEVICE depends on SERIO_I8042 depends on RFKILL || RFKILL = n + depends on INPUT select ACPI_WMI ---help--- This is a driver for newer Acer (and Wistron) laptops. It adds diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index 2badee2..79d2553 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -37,6 +37,7 @@ #include <linux/workqueue.h> #include <linux/debugfs.h> #include <linux/slab.h> +#include <linux/input.h> #include <acpi/acpi_drivers.h> @@ -48,6 +49,7 @@ MODULE_LICENSE("GPL"); #define ACER_ERR KERN_ERR ACER_LOGPREFIX #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX #define ACER_INFO KERN_INFO ACER_LOGPREFIX +#define ACER_WARNING KERN_WARNING ACER_LOGPREFIX /* * Magic Number @@ -83,8 +85,47 @@ MODULE_LICENSE("GPL"); #define WMID_GUID1 "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3" #define WMID_GUID2 "95764E09-FB56-4e83-B31A-37761F60994A" +/* + * Acer ACPI event GUIDs + */ +#define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026" + MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB"); MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"); +MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026"); + +enum acer_wmi_event_ids { + WMID_HOTKEY_EVENT = 0x1, +}; + +struct key_entry { + char type; /* See KE_* below */ + u16 code; + u16 keycode; +}; + +enum { KE_KEY, KE_END }; + +static struct key_entry acer_wmi_keymap[] = { + {KE_KEY, 0x01, KEY_WLAN}, /* WiFi */ + {KE_KEY, 0x12, KEY_BLUETOOTH}, /* BT */ + {KE_KEY, 0x21, KEY_PROG1}, /* Backup */ + {KE_KEY, 0x22, KEY_PROG2}, /* Aracade */ + {KE_KEY, 0x23, KEY_PROG3}, /* P_Key */ + {KE_KEY, 0x24, KEY_PROG4}, /* Social networking_Key */ + {KE_KEY, 0x64, KEY_SWITCHVIDEOMODE}, /* Display Switch */ + {KE_KEY, 0x82, KEY_F22}, /* Touch Pad On/Off */ + {KE_END, 0} +}; + +static struct input_dev *acer_wmi_input_dev; + +struct event_return_value { + u8 function; + u8 key_num; + u16 device_state; + u32 reserved; +} __attribute__((packed)); /* * Interface capability flags @@ -1085,6 +1126,156 @@ static ssize_t show_interface(struct device *dev, struct device_attribute *attr, static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL); +static struct key_entry *acer_wmi_get_entry_by_scancode(unsigned int code) +{ + struct key_entry *key; + + for (key = acer_wmi_keymap; key->type != KE_END; key++) { + if (code == key->code) + return key; + } + + return NULL; +} + +static struct key_entry *acer_wmi_get_entry_by_keycode(unsigned int keycode) +{ + struct key_entry *key; + + for (key = acer_wmi_keymap; key->type != KE_END; key++) + if (key->type == KE_KEY && keycode == key->keycode) + return key; + + return NULL; +} + +static int acer_wmi_getkeycode(struct input_dev *dev, + unsigned int scancode, unsigned int *keycode) +{ + struct key_entry *key = acer_wmi_get_entry_by_scancode(scancode); + + if (key && key->type == KE_KEY) { + *keycode = key->keycode; + return 0; + } + + return -EINVAL; +} + +static int acer_wmi_setkeycode(struct input_dev *dev, + unsigned int scancode, unsigned int keycode) +{ + struct key_entry *key; + unsigned int old_keycode; + + key = acer_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 (!acer_wmi_get_entry_by_keycode(old_keycode)) + clear_bit(old_keycode, dev->keybit); + return 0; + } + + return -EINVAL; +} + +static void acer_wmi_notify(u32 value, void *context) +{ + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; + static struct key_entry *key; + union acpi_object *obj; + struct event_return_value return_value; + acpi_status status; + + status = wmi_get_event_data(value, &response); + if (status != AE_OK) { + printk(ACER_WARNING "bad event status 0x%x\n", status); + return; + } + + obj = (union acpi_object *)response.pointer; + + if (!obj) + return; + if (obj->type != ACPI_TYPE_BUFFER) { + printk(ACER_WARNING "Unknown response received %d\n", + obj->type); + kfree(obj); + return; + } + if (obj->buffer.length != 8) { + printk(ACER_WARNING "Unknown buffer length %d\n", + obj->buffer.length); + kfree(obj); + return; + } + + return_value = *((struct event_return_value *)obj->buffer.pointer); + kfree(obj); + + switch (return_value.function) { + case WMID_HOTKEY_EVENT: + key = acer_wmi_get_entry_by_scancode(return_value.key_num); + if (key) { + switch (key->type) { + case KE_KEY: + input_report_key(acer_wmi_input_dev, + key->keycode, 1); + input_sync(acer_wmi_input_dev); + input_report_key(acer_wmi_input_dev, + key->keycode, 0); + input_sync(acer_wmi_input_dev); + break; + } + } else + printk(ACER_WARNING "Unknown key number - 0x%x\n", + return_value.key_num); + break; + default: + printk(ACER_WARNING "Unknown function number - %d - %d\n", + return_value.function, return_value.key_num); + break; + } +} + +static int __init acer_wmi_input_setup(void) +{ + struct key_entry *key; + int err; + + acer_wmi_input_dev = input_allocate_device(); + if (!acer_wmi_input_dev) + return -ENOMEM; + + acer_wmi_input_dev->name = "Acer WMI hotkeys"; + acer_wmi_input_dev->phys = "wmi/input0"; + acer_wmi_input_dev->id.bustype = BUS_HOST; + acer_wmi_input_dev->getkeycode = acer_wmi_getkeycode; + acer_wmi_input_dev->setkeycode = acer_wmi_setkeycode; + + for (key = acer_wmi_keymap; key->type != KE_END; key++) { + switch (key->type) { + case KE_KEY: + set_bit(EV_KEY, acer_wmi_input_dev->evbit); + set_bit(key->keycode, acer_wmi_input_dev->keybit); + break; + } + } + + set_bit(EV_SW, acer_wmi_input_dev->evbit); + + err = input_register_device(acer_wmi_input_dev); + + if (err) { + input_free_device(acer_wmi_input_dev); + return err; + } + + return 0; +} + /* * debugfs functions */ @@ -1327,6 +1518,18 @@ static int __init acer_wmi_init(void) "generic video driver\n"); } + if (wmi_has_guid(ACERWMID_EVENT_GUID)) { + err = wmi_install_notify_handler(ACERWMID_EVENT_GUID, + acer_wmi_notify, NULL); + if (ACPI_FAILURE(err)) + return -EINVAL; + err = acer_wmi_input_setup(); + if (err) { + wmi_remove_notify_handler(ACERWMID_EVENT_GUID); + return err; + } + } + err = platform_driver_register(&acer_platform_driver); if (err) { printk(ACER_ERR "Unable to register platform driver.\n"); @@ -1368,11 +1571,21 @@ error_device_add: error_device_alloc: platform_driver_unregister(&acer_platform_driver); error_platform_register: + if (wmi_has_guid(ACERWMID_EVENT_GUID)) { + input_unregister_device(acer_wmi_input_dev); + wmi_remove_notify_handler(ACERWMID_EVENT_GUID); + } + return err; } static void __exit acer_wmi_exit(void) { + if (wmi_has_guid(ACERWMID_EVENT_GUID)) { + wmi_remove_notify_handler(ACERWMID_EVENT_GUID); + input_unregister_device(acer_wmi_input_dev); + } + remove_sysfs(acer_platform_device); remove_debugfs(); platform_device_unregister(acer_platform_device); -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
