acer-wmi: Add acer wmi hotkey events support (3fdca87d) · Commits · 戴 / test

drivers/platform/x86/Kconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -22,8 +22,10 @@ config ACER_WMI
		depends on NEW_LEDS
		depends on BACKLIGHT_CLASS_DEVICE
		depends on SERIO_I8042
		depends on INPUT
		depends on RFKILL \|\| RFKILL = n
		depends on 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,

drivers/platform/x86/acer-wmi.c

+139 −0

Original line number	Diff line number	Diff line
		@@ -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);

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