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HID: sony: Report hardware timestamp for DS4 sensor values 

Report the hardware timestamp inside each HID report through
MSC_TIMESTAMP for motion sensor values.

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Roderick Colenbrander 2017-03-07 15:45:02 -08:00 committed by Jiri Kosina
parent 55a07d62db
commit 80786eb9ab
1 changed files with 27 additions and 0 deletions
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27
drivers/hid/hid-sony.c
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@ -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
@ -837,6 +838,11 @@ struct sony_sc {
u8 led_delay_on[MAX_LEDS];
u8 led_delay_off[MAX_LEDS];
u8 led_count;
bool timestamp_initialized;
u16 prev_timestamp;
unsigned int timestamp_us;
bool ds4_dongle_connected;
/* DS4 calibration data */
struct ds4_calibration_data ds4_calib_data[6];
@ -1031,6 +1037,7 @@ 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;
@ -1039,6 +1046,24 @@ 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. */
@ -1385,6 +1410,8 @@ 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);