diff options
Diffstat (limited to 'drivers/platform/x86/acer-wmi.c')
| -rw-r--r-- | drivers/platform/x86/acer-wmi.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index c8c65375bfe2..a1c6141f463b 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -37,6 +37,8 @@ #include <linux/workqueue.h> #include <linux/debugfs.h> #include <linux/slab.h> +#include <linux/input.h> +#include <linux/input/sparse-keymap.h> #include <acpi/acpi_drivers.h> @@ -48,6 +50,7 @@ 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 +86,39 @@ 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, +}; + +static const 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} }, /* Arcade */ + {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 +1119,99 @@ static ssize_t show_interface(struct device *dev, struct device_attribute *attr, static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL); +static void acer_wmi_notify(u32 value, void *context) +{ + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; + 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: + if (!sparse_keymap_report_event(acer_wmi_input_dev, + return_value.key_num, 1, true)) + 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) +{ + acpi_status status; + 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; + + err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL); + if (err) + goto err_free_dev; + + status = wmi_install_notify_handler(ACERWMID_EVENT_GUID, + acer_wmi_notify, NULL); + if (ACPI_FAILURE(status)) { + err = -EIO; + goto err_free_keymap; + } + + err = input_register_device(acer_wmi_input_dev); + if (err) + goto err_uninstall_notifier; + + return 0; + +err_uninstall_notifier: + wmi_remove_notify_handler(ACERWMID_EVENT_GUID); +err_free_keymap: + sparse_keymap_free(acer_wmi_input_dev); +err_free_dev: + input_free_device(acer_wmi_input_dev); + return err; +} + +static void acer_wmi_input_destroy(void) +{ + wmi_remove_notify_handler(ACERWMID_EVENT_GUID); + sparse_keymap_free(acer_wmi_input_dev); + input_unregister_device(acer_wmi_input_dev); +} + /* * debugfs functions */ @@ -1327,6 +1454,12 @@ static int __init acer_wmi_init(void) "generic video driver\n"); } + if (wmi_has_guid(ACERWMID_EVENT_GUID)) { + err = acer_wmi_input_setup(); + if (err) + return err; + } + err = platform_driver_register(&acer_platform_driver); if (err) { printk(ACER_ERR "Unable to register platform driver.\n"); @@ -1368,11 +1501,17 @@ error_device_add: error_device_alloc: platform_driver_unregister(&acer_platform_driver); error_platform_register: + if (wmi_has_guid(ACERWMID_EVENT_GUID)) + acer_wmi_input_destroy(); + return err; } static void __exit acer_wmi_exit(void) { + if (wmi_has_guid(ACERWMID_EVENT_GUID)) + acer_wmi_input_destroy(); + remove_sysfs(acer_platform_device); remove_debugfs(); platform_device_unregister(acer_platform_device); |