From: Roderick Colenbrander <roderick.colenbrander@xxxxxxxx>
Report the hardware timestamp inside each HID report through
MSC_TIMESTAMP for motion sensor values.
Signed-off-by: Roderick Colenbrander <roderick.colenbrander@xxxxxxxx>
---
drivers/hid/hid-sony.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index d9e5254..2127613 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -781,6 +781,7 @@ struct motion_output_report_02 {
* additional +2.
*/
#define DS4_INPUT_REPORT_BUTTON_OFFSET 5
+#define DS4_INPUT_REPORT_TIMESTAMP_OFFSET 10
#define DS4_INPUT_REPORT_GYRO_X_OFFSET 13
#define DS4_INPUT_REPORT_BATTERY_OFFSET 30
#define DS4_INPUT_REPORT_TOUCHPAD_OFFSET 33
@@ -839,6 +840,10 @@ struct sony_sc {
u8 led_delay_off[MAX_LEDS];
u8 led_count;
+ bool timestamp_initialized;
+ u16 prev_timestamp;
+ unsigned int timestamp_us;
+
/* DS4 calibration data */
struct ds4_calibration_data ds4_calib_data[6];
};
@@ -1030,6 +1035,7 @@ static void dualshock4_parse_report(struct sony_sc *sc, u8 *rd, int size)
unsigned long flags;
int n, m, offset, num_touch_data, max_touch_data;
u8 cable_state, battery_capacity, battery_charging;
+ u16 timestamp;
/* When using Bluetooth the header is 2 bytes longer, so skip these. */
int data_offset = (sc->quirks & DUALSHOCK4_CONTROLLER_USB) ? 0 : 2;
@@ -1038,6 +1044,24 @@ static void dualshock4_parse_report(struct sony_sc *sc, u8 *rd, int size)
offset = data_offset + DS4_INPUT_REPORT_BUTTON_OFFSET;
input_report_key(sc->touchpad, BTN_LEFT, rd[offset+2] & 0x2);
+ /* Convert timestamp (in 5.33us unit) to timestamp_us */
+ offset = data_offset + DS4_INPUT_REPORT_TIMESTAMP_OFFSET;
+ timestamp = get_unaligned_le16(&rd[offset]);
+ if (!sc->timestamp_initialized) {
+ sc->timestamp_us = ((unsigned int)timestamp * 16) / 3;
+ sc->timestamp_initialized = true;
+ } else {
+ u16 delta;
+
+ if (sc->prev_timestamp > timestamp)
+ delta = (U16_MAX - sc->prev_timestamp + timestamp + 1);
+ else
+ delta = timestamp - sc->prev_timestamp;
+ sc->timestamp_us += (delta * 16) / 3;
+ }
+ sc->prev_timestamp = timestamp;
+ input_event(sc->sensor_dev, EV_MSC, MSC_TIMESTAMP, sc->timestamp_us);
+
offset = data_offset + DS4_INPUT_REPORT_GYRO_X_OFFSET;
for (n = 0; n < 6; n++) {
/* Store data in int for more precision during mult_frac. */
@@ -1359,6 +1383,8 @@ static int sony_register_sensors(struct sony_sc *sc)
input_abs_set_res(sc->sensor_dev, ABS_RY, DS4_GYRO_RES_PER_DEG_S);
input_abs_set_res(sc->sensor_dev, ABS_RZ, DS4_GYRO_RES_PER_DEG_S);
+ __set_bit(EV_MSC, sc->sensor_dev->evbit);
+ __set_bit(MSC_TIMESTAMP, sc->sensor_dev->mscbit);
__set_bit(INPUT_PROP_ACCELEROMETER, sc->sensor_dev->propbit);
ret = input_register_device(sc->sensor_dev);
--
2.7.4
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