Merge branch 'dell-wmi' into release (689a8ab3) · Commits · e / devices / android_kernel_samsung_exynos5433

drivers/platform/x86/dell-wmi.c

+116 −13

Original line number	Diff line number	Diff line
		@@ -31,6 +31,7 @@
		#include <acpi/acpi_drivers.h>
		#include <linux/acpi.h>
		#include <linux/string.h>
		#include <linux/dmi.h>

		MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
		MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
		@@ -38,6 +39,8 @@ MODULE_LICENSE("GPL");

		#define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"

		static int acpi_video;

		MODULE_ALIAS("wmi:"DELL_EVENT_GUID);

		struct key_entry {
		@@ -54,7 +57,7 @@ enum { KE_KEY, KE_SW, KE_IGNORE, KE_END };
		* via the keyboard controller so should not be sent again.
		*/

		static struct key_entry dell_wmi_keymap[] = {
		static struct key_entry dell_legacy_wmi_keymap[] = {
		{KE_KEY, 0xe045, KEY_PROG1},
		{KE_KEY, 0xe009, KEY_EJECTCD},

		@@ -72,7 +75,7 @@ static struct key_entry dell_wmi_keymap[] = {

		/* The next device is at offset 6, the active devices are at
		offset 8 and the attached devices at offset 10 */
		{KE_KEY, 0xe00b, KEY_DISPLAYTOGGLE},
		{KE_KEY, 0xe00b, KEY_SWITCHVIDEOMODE},

		{KE_IGNORE, 0xe00c, KEY_KBDILLUMTOGGLE},

		@@ -96,6 +99,47 @@ static struct key_entry dell_wmi_keymap[] = {
		{KE_END, 0}
		};

		static bool dell_new_hk_type;

		struct dell_new_keymap_entry {
		u16 scancode;
		u16 keycode;
		};

		struct dell_hotkey_table {
		struct dmi_header header;
		struct dell_new_keymap_entry keymap[];

		};

		static struct key_entry *dell_new_wmi_keymap;

		static u16 bios_to_linux_keycode[256] = {

		KEY_MEDIA, KEY_NEXTSONG, KEY_PLAYPAUSE, KEY_PREVIOUSSONG,
		KEY_STOPCD, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
		KEY_WWW, KEY_UNKNOWN, KEY_VOLUMEDOWN, KEY_MUTE,
		KEY_VOLUMEUP, KEY_UNKNOWN, KEY_BATTERY, KEY_EJECTCD,
		KEY_UNKNOWN, KEY_SLEEP, KEY_PROG1, KEY_BRIGHTNESSDOWN,
		KEY_BRIGHTNESSUP, KEY_UNKNOWN, KEY_KBDILLUMTOGGLE,
		KEY_UNKNOWN, KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN,
		KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, KEY_PROG2,
		KEY_UNKNOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		KEY_PROG3
		};


		static struct key_entry *dell_wmi_keymap = dell_legacy_wmi_keymap;

		static struct input_dev *dell_wmi_input_dev;

		static struct key_entry *dell_wmi_get_entry_by_scancode(int code)
		@@ -164,23 +208,77 @@ static void dell_wmi_notify(u32 value, void *context)
		obj = (union acpi_object *)response.pointer;

		if (obj && obj->type == ACPI_TYPE_BUFFER) {
		int buffer = (int )obj->buffer.pointer;
		/*
		* The upper bytes of the event may contain
		* additional information, so mask them off for the
		* scancode lookup
		*/
		key = dell_wmi_get_entry_by_scancode(buffer[1] & 0xFFFF);
		if (key) {
		int reported_key;
		u16 buffer_entry = (u16 )obj->buffer.pointer;
		if (dell_new_hk_type && (buffer_entry[1] != 0x10)) {
		printk(KERN_INFO "dell-wmi: Received unknown WMI event"
		" (0x%x)\n", buffer_entry[1]);
		return;
		}

		if (dell_new_hk_type)
		reported_key = (int)buffer_entry[2];
		else
		reported_key = (int)buffer_entry[1] & 0xffff;

		key = dell_wmi_get_entry_by_scancode(reported_key);

		if (!key) {
		printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n",
		reported_key);
		} else if ((key->keycode == KEY_BRIGHTNESSUP \|\|
		key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) {
		/* Don't report brightness notifications that will also
		* come via ACPI */
		return;
		} else {
		input_report_key(dell_wmi_input_dev, key->keycode, 1);
		input_sync(dell_wmi_input_dev);
		input_report_key(dell_wmi_input_dev, key->keycode, 0);
		input_sync(dell_wmi_input_dev);
		} else if (buffer[1] & 0xFFFF)
		printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n",
		buffer[1] & 0xFFFF);
		}
		}
		}


		static void setup_new_hk_map(const struct dmi_header *dm)
		{

		int i;
		int hotkey_num = (dm->length-4)/sizeof(struct dell_new_keymap_entry);
		struct dell_hotkey_table *table =
		container_of(dm, struct dell_hotkey_table, header);

		dell_new_wmi_keymap = kzalloc((hotkey_num+1) *
		sizeof(struct key_entry), GFP_KERNEL);

		for (i = 0; i < hotkey_num; i++) {
		dell_new_wmi_keymap[i].type = KE_KEY;
		dell_new_wmi_keymap[i].code = table->keymap[i].scancode;
		dell_new_wmi_keymap[i].keycode =
		(table->keymap[i].keycode > 255) ? 0 :
		bios_to_linux_keycode[table->keymap[i].keycode];
		}

		dell_new_wmi_keymap[i].type = KE_END;
		dell_new_wmi_keymap[i].code = 0;
		dell_new_wmi_keymap[i].keycode = 0;

		dell_wmi_keymap = dell_new_wmi_keymap;

		}


		static void find_hk_type(const struct dmi_header dm, void dummy)
		{

		if ((dm->type == 0xb2) && (dm->length > 6)) {
		dell_new_hk_type = true;
		setup_new_hk_map(dm);
		}

		}


		static int __init dell_wmi_input_setup(void)
		{
		@@ -226,6 +324,9 @@ static int __init dell_wmi_init(void)
		int err;

		if (wmi_has_guid(DELL_EVENT_GUID)) {

		dmi_walk(find_hk_type, NULL);

		err = dell_wmi_input_setup();

		if (err)
		@@ -240,6 +341,8 @@ static int __init dell_wmi_init(void)
		return err;
		}

		acpi_video = acpi_video_backlight_support();

		} else
		printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");