Map Android Home, Back, Search, VolumeUp, VolumeDown, and PlayPause buttons
to the appropriate input event codes.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@xxxxxxxxxx>
---
drivers/hid/hid-nvidia-shield.c | 55 ++++++++++++++++++++++++++++++---
1 file changed, 50 insertions(+), 5 deletions(-)
diff --git a/drivers/hid/hid-nvidia-shield.c b/drivers/hid/hid-nvidia-shield.c
index bcf345e365c0..1a9d32b2c80c 100644
--- a/drivers/hid/hid-nvidia-shield.c
+++ b/drivers/hid/hid-nvidia-shield.c
@@ -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)
{
@@ -571,11 +615,12 @@ static const struct hid_device_id shield_devices[] = {
MODULE_DEVICE_TABLE(hid, shield_devices);
static struct hid_driver shield_driver = {
- .name = "shield",
- .id_table = shield_devices,
- .probe = shield_probe,
- .remove = shield_remove,
- .raw_event = shield_raw_event,
+ .name = "shield",
+ .id_table = shield_devices,
+ .input_mapping = android_input_mapping,
+ .probe = shield_probe,
+ .remove = shield_remove,
+ .raw_event = shield_raw_event,
.driver = {
.dev_groups = shield_device_groups,
},
--
2.38.4
