Add CC. Thomas
æ æï2010-10-31 æ 00:36 +0800ïLee, Chun-Yi æåï
> 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@xxxxxxxxxx>
> ---
> drivers/platform/x86/Kconfig | 2 +
> drivers/platform/x86/acer-wmi.c | 139 +++++++++++++++++++++++++++++++++++++++
> 2 files changed, 141 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index cff7cc2..c242fdd 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -23,7 +23,9 @@ config ACER_WMI
> depends on BACKLIGHT_CLASS_DEVICE
> depends on SERIO_I8042
> depends on RFKILL || RFKILL = n
> + depends on INPUT
> select ACPI_WMI
> + select INPUT_SPARSEKMAP
> ---help---
> This is a driver for newer Acer (and Wistron) laptops. It adds
> wireless radio and bluetooth control, and on some laptops,
> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
> index 2badee2..930df56 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} }, /* 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 +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);
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