Commit 13d02c69 authored by Rahul Rameshbabu's avatar Rahul Rameshbabu Committed by Jiri Kosina
Browse files

HID: nvidia-shield: Add mappings for consumer HID USAGE buttons 



Map Android Home, Back, Search, VolumeUp, VolumeDown, and PlayPause buttons
to the appropriate input event codes.

Signed-off-by: default avatarRahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 09308562

drivers/hid/hid-nvidia-shield.c

+50 −5
Original line number Diff line number Diff line
@@ -15,6 +15,16 @@ 
#include "hid-ids.h"



#define NOT_INIT_STR "NOT INITIALIZED"

#define android_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c))



enum {

	HID_USAGE_ANDROID_PLAYPAUSE_BTN = 0xcd, /* Double-tap volume slider */

	HID_USAGE_ANDROID_VOLUMEUP_BTN = 0xe9,

	HID_USAGE_ANDROID_VOLUMEDOWN_BTN = 0xea,

	HID_USAGE_ANDROID_SEARCH_BTN = 0x221, /* NVIDIA btn on Thunderstrike */

	HID_USAGE_ANDROID_HOME_BTN = 0x223,

	HID_USAGE_ANDROID_BACK_BTN = 0x224,

};



enum {

	SHIELD_FW_VERSION_INITIALIZED = 0,
@@ -416,6 +426,40 @@ static struct shield_device *thunderstrike_create(struct hid_device *hdev) 
	return shield_dev;

}



static int android_input_mapping(struct hid_device *hdev, struct hid_input *hi,

				 struct hid_field *field,

				 struct hid_usage *usage, unsigned long **bit,

				 int *max)

{

	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)

		return 0;



	switch (usage->hid & HID_USAGE) {

	case HID_USAGE_ANDROID_PLAYPAUSE_BTN:

		android_map_key(KEY_PLAYPAUSE);

		break;

	case HID_USAGE_ANDROID_VOLUMEUP_BTN:

		android_map_key(KEY_VOLUMEUP);

		break;

	case HID_USAGE_ANDROID_VOLUMEDOWN_BTN:

		android_map_key(KEY_VOLUMEDOWN);

		break;

	case HID_USAGE_ANDROID_SEARCH_BTN:

		android_map_key(BTN_Z);

		break;

	case HID_USAGE_ANDROID_HOME_BTN:

		android_map_key(BTN_MODE);

		break;

	case HID_USAGE_ANDROID_BACK_BTN:

		android_map_key(BTN_SELECT);

		break;

	default:

		return 0;

	}



	return 1;

}



static ssize_t firmware_version_show(struct device *dev,

				     struct device_attribute *attr, char *buf)

{
@@ -573,6 +617,7 @@ MODULE_DEVICE_TABLE(hid, shield_devices); 
static struct hid_driver shield_driver = {

	.name          = "shield",

	.id_table      = shield_devices,

	.input_mapping = android_input_mapping,

	.probe         = shield_probe,

	.remove        = shield_remove,

	.raw_event     = shield_raw_event,