diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt index 36ea940e5bb9..575415f4cef0 100644 --- a/Documentation/input/event-codes.txt +++ b/Documentation/input/event-codes.txt @@ -301,7 +301,10 @@ them as any other INPUT_PROP_BUTTONPAD device. INPUT_PROP_ACCELEROMETER ------------------------- Directional axes on this device (absolute and/or relative x, y, z) represent -accelerometer data. All other axes retain their meaning. A device must not mix +accelerometer data. Some devices also report gyroscope data, which devices +can report through the rotational axes (absolute and/or relative rx, ry, rz). + +All other axes retain their meaning. A device must not mix regular directional axes and accelerometer axes on the same event node. Guidelines: diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index 7e2bae309671..17df165133ab 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -344,265 +344,6 @@ static u8 navigation_rdesc[] = { 0xC0 /* End Collection */ }; -/* - * The default descriptor doesn't provide mapping for the accelerometers - * or orientation sensors. This fixed descriptor maps the accelerometers - * to usage values 0x40, 0x41 and 0x42 and maps the orientation sensors - * to usage values 0x43, 0x44 and 0x45. - */ -static u8 dualshock4_usb_rdesc[] = { - 0x05, 0x01, /* Usage Page (Desktop), */ - 0x09, 0x05, /* Usage (Gamepad), */ - 0xA1, 0x01, /* Collection (Application), */ - 0x85, 0x01, /* Report ID (1), */ - 0x09, 0x30, /* Usage (X), */ - 0x09, 0x31, /* Usage (Y), */ - 0x09, 0x32, /* Usage (Z), */ - 0x09, 0x35, /* Usage (Rz), */ - 0x15, 0x00, /* Logical Minimum (0), */ - 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ - 0x75, 0x08, /* Report Size (8), */ - 0x95, 0x04, /* Report Count (4), */ - 0x81, 0x02, /* Input (Variable), */ - 0x09, 0x39, /* Usage (Hat Switch), */ - 0x15, 0x00, /* Logical Minimum (0), */ - 0x25, 0x07, /* Logical Maximum (7), */ - 0x35, 0x00, /* Physical Minimum (0), */ - 0x46, 0x3B, 0x01, /* Physical Maximum (315), */ - 0x65, 0x14, /* Unit (Degrees), */ - 0x75, 0x04, /* Report Size (4), */ - 0x95, 0x01, /* Report Count (1), */ - 0x81, 0x42, /* Input (Variable, Null State), */ - 0x65, 0x00, /* Unit, */ - 0x05, 0x09, /* Usage Page (Button), */ - 0x19, 0x01, /* Usage Minimum (01h), */ - 0x29, 0x0D, /* Usage Maximum (0Dh), */ - 0x15, 0x00, /* Logical Minimum (0), */ - 0x25, 0x01, /* Logical Maximum (1), */ - 0x75, 0x01, /* Report Size (1), */ - 0x95, 0x0E, /* Report Count (14), */ - 0x81, 0x02, /* Input (Variable), */ - 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */ - 0x09, 0x20, /* Usage (20h), */ - 0x75, 0x06, /* Report Size (6), */ - 0x95, 0x01, /* Report Count (1), */ - 0x15, 0x00, /* Logical Minimum (0), */ - 0x25, 0x3F, /* Logical Maximum (63), */ - 0x81, 0x02, /* Input (Variable), */ - 0x05, 0x01, /* Usage Page (Desktop), */ - 0x09, 0x33, /* Usage (Rx), */ - 0x09, 0x34, /* Usage (Ry), */ - 0x15, 0x00, /* Logical Minimum (0), */ - 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ - 0x75, 0x08, /* Report Size (8), */ - 0x95, 0x02, /* Report Count (2), */ - 0x81, 0x02, /* Input (Variable), */ - 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */ - 0x09, 0x21, /* Usage (21h), */ - 0x95, 0x03, /* Report Count (3), */ - 0x81, 0x02, /* Input (Variable), */ - 0x05, 0x01, /* Usage Page (Desktop), */ - 0x19, 0x40, /* Usage Minimum (40h), */ - 0x29, 0x42, /* Usage Maximum (42h), */ - 0x16, 0x00, 0x80, /* Logical Minimum (-32768), */ - 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ - 0x75, 0x10, /* Report Size (16), */ - 0x95, 0x03, /* Report Count (3), */ - 0x81, 0x02, /* Input (Variable), */ - 0x19, 0x43, /* Usage Minimum (43h), */ - 0x29, 0x45, /* Usage Maximum (45h), */ - 0x16, 0x00, 0x80, /* Logical Minimum (-32768), */ - 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ - 0x95, 0x03, /* Report Count (3), */ - 0x81, 0x02, /* Input (Variable), */ - 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */ - 0x09, 0x21, /* Usage (21h), */ - 0x15, 0x00, /* Logical Minimum (0), */ - 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ - 0x75, 0x08, /* Report Size (8), */ - 0x95, 0x27, /* Report Count (39), */ - 0x81, 0x02, /* Input (Variable), */ - 0x85, 0x05, /* Report ID (5), */ - 0x09, 0x22, /* Usage (22h), */ - 0x95, 0x1F, /* Report Count (31), */ - 0x91, 0x02, /* Output (Variable), */ - 0x85, 0x04, /* Report ID (4), */ - 0x09, 0x23, /* Usage (23h), */ - 0x95, 0x24, /* Report Count (36), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x02, /* Report ID (2), */ - 0x09, 0x24, /* Usage (24h), */ - 0x95, 0x24, /* Report Count (36), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x08, /* Report ID (8), */ - 0x09, 0x25, /* Usage (25h), */ - 0x95, 0x03, /* Report Count (3), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x10, /* Report ID (16), */ - 0x09, 0x26, /* Usage (26h), */ - 0x95, 0x04, /* Report Count (4), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x11, /* Report ID (17), */ - 0x09, 0x27, /* Usage (27h), */ - 0x95, 0x02, /* Report Count (2), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x12, /* Report ID (18), */ - 0x06, 0x02, 0xFF, /* Usage Page (FF02h), */ - 0x09, 0x21, /* Usage (21h), */ - 0x95, 0x0F, /* Report Count (15), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x13, /* Report ID (19), */ - 0x09, 0x22, /* Usage (22h), */ - 0x95, 0x16, /* Report Count (22), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x14, /* Report ID (20), */ - 0x06, 0x05, 0xFF, /* Usage Page (FF05h), */ - 0x09, 0x20, /* Usage (20h), */ - 0x95, 0x10, /* Report Count (16), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x15, /* Report ID (21), */ - 0x09, 0x21, /* Usage (21h), */ - 0x95, 0x2C, /* Report Count (44), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x06, 0x80, 0xFF, /* Usage Page (FF80h), */ - 0x85, 0x80, /* Report ID (128), */ - 0x09, 0x20, /* Usage (20h), */ - 0x95, 0x06, /* Report Count (6), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x81, /* Report ID (129), */ - 0x09, 0x21, /* Usage (21h), */ - 0x95, 0x06, /* Report Count (6), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x82, /* Report ID (130), */ - 0x09, 0x22, /* Usage (22h), */ - 0x95, 0x05, /* Report Count (5), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x83, /* Report ID (131), */ - 0x09, 0x23, /* Usage (23h), */ - 0x95, 0x01, /* Report Count (1), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x84, /* Report ID (132), */ - 0x09, 0x24, /* Usage (24h), */ - 0x95, 0x04, /* Report Count (4), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x85, /* Report ID (133), */ - 0x09, 0x25, /* Usage (25h), */ - 0x95, 0x06, /* Report Count (6), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x86, /* Report ID (134), */ - 0x09, 0x26, /* Usage (26h), */ - 0x95, 0x06, /* Report Count (6), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x87, /* Report ID (135), */ - 0x09, 0x27, /* Usage (27h), */ - 0x95, 0x23, /* Report Count (35), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x88, /* Report ID (136), */ - 0x09, 0x28, /* Usage (28h), */ - 0x95, 0x22, /* Report Count (34), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x89, /* Report ID (137), */ - 0x09, 0x29, /* Usage (29h), */ - 0x95, 0x02, /* Report Count (2), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x90, /* Report ID (144), */ - 0x09, 0x30, /* Usage (30h), */ - 0x95, 0x05, /* Report Count (5), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x91, /* Report ID (145), */ - 0x09, 0x31, /* Usage (31h), */ - 0x95, 0x03, /* Report Count (3), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x92, /* Report ID (146), */ - 0x09, 0x32, /* Usage (32h), */ - 0x95, 0x03, /* Report Count (3), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0x93, /* Report ID (147), */ - 0x09, 0x33, /* Usage (33h), */ - 0x95, 0x0C, /* Report Count (12), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA0, /* Report ID (160), */ - 0x09, 0x40, /* Usage (40h), */ - 0x95, 0x06, /* Report Count (6), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA1, /* Report ID (161), */ - 0x09, 0x41, /* Usage (41h), */ - 0x95, 0x01, /* Report Count (1), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA2, /* Report ID (162), */ - 0x09, 0x42, /* Usage (42h), */ - 0x95, 0x01, /* Report Count (1), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA3, /* Report ID (163), */ - 0x09, 0x43, /* Usage (43h), */ - 0x95, 0x30, /* Report Count (48), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA4, /* Report ID (164), */ - 0x09, 0x44, /* Usage (44h), */ - 0x95, 0x0D, /* Report Count (13), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA5, /* Report ID (165), */ - 0x09, 0x45, /* Usage (45h), */ - 0x95, 0x15, /* Report Count (21), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA6, /* Report ID (166), */ - 0x09, 0x46, /* Usage (46h), */ - 0x95, 0x15, /* Report Count (21), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xF0, /* Report ID (240), */ - 0x09, 0x47, /* Usage (47h), */ - 0x95, 0x3F, /* Report Count (63), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xF1, /* Report ID (241), */ - 0x09, 0x48, /* Usage (48h), */ - 0x95, 0x3F, /* Report Count (63), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xF2, /* Report ID (242), */ - 0x09, 0x49, /* Usage (49h), */ - 0x95, 0x0F, /* Report Count (15), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA7, /* Report ID (167), */ - 0x09, 0x4A, /* Usage (4Ah), */ - 0x95, 0x01, /* Report Count (1), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA8, /* Report ID (168), */ - 0x09, 0x4B, /* Usage (4Bh), */ - 0x95, 0x01, /* Report Count (1), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xA9, /* Report ID (169), */ - 0x09, 0x4C, /* Usage (4Ch), */ - 0x95, 0x08, /* Report Count (8), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xAA, /* Report ID (170), */ - 0x09, 0x4E, /* Usage (4Eh), */ - 0x95, 0x01, /* Report Count (1), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xAB, /* Report ID (171), */ - 0x09, 0x4F, /* Usage (4Fh), */ - 0x95, 0x39, /* Report Count (57), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xAC, /* Report ID (172), */ - 0x09, 0x50, /* Usage (50h), */ - 0x95, 0x39, /* Report Count (57), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xAD, /* Report ID (173), */ - 0x09, 0x51, /* Usage (51h), */ - 0x95, 0x0B, /* Report Count (11), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xAE, /* Report ID (174), */ - 0x09, 0x52, /* Usage (52h), */ - 0x95, 0x01, /* Report Count (1), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xAF, /* Report ID (175), */ - 0x09, 0x53, /* Usage (53h), */ - 0x95, 0x02, /* Report Count (2), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0x85, 0xB0, /* Report ID (176), */ - 0x09, 0x54, /* Usage (54h), */ - 0x95, 0x3F, /* Report Count (63), */ - 0xB1, 0x02, /* Feature (Variable), */ - 0xC0 /* End Collection */ -}; /* * The default behavior of the Dualshock 4 is to send reports using report @@ -706,31 +447,10 @@ static u8 dualshock4_bt_rdesc[] = { 0x75, 0x08, /* Report Size (8), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x02, /* Input (Variable), */ - 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */ - 0x09, 0x20, /* Usage (20h), */ - 0x95, 0x03, /* Report Count (3), */ - 0x81, 0x02, /* Input (Variable), */ - 0x05, 0x01, /* Usage Page (Desktop), */ - 0x19, 0x40, /* Usage Minimum (40h), */ - 0x29, 0x42, /* Usage Maximum (42h), */ - 0x16, 0x00, 0x80, /* Logical Minimum (-32768), */ - 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ - 0x75, 0x10, /* Report Size (16), */ - 0x95, 0x03, /* Report Count (3), */ - 0x81, 0x02, /* Input (Variable), */ - 0x19, 0x43, /* Usage Minimum (43h), */ - 0x29, 0x45, /* Usage Maximum (45h), */ - 0x16, 0x00, 0x80, /* Logical Minimum (-32768), */ - 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ - 0x95, 0x03, /* Report Count (3), */ - 0x81, 0x02, /* Input (Variable), */ - 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */ - 0x09, 0x20, /* Usage (20h), */ - 0x15, 0x00, /* Logical Minimum (0), */ - 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ - 0x75, 0x08, /* Report Size (8), */ - 0x95, 0x31, /* Report Count (51), */ - 0x81, 0x02, /* Input (Variable), */ + 0x06, 0x00, 0xFF, /* Usage Page (FF00h) */ + 0x09, 0x21, /* Usage (0x21) */ + 0x95, 0x42, /* Report Count (66) */ + 0x81, 0x02, /* Input (Variable) */ 0x09, 0x21, /* Usage (21h), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x4D, /* Report Count (77), */ @@ -1060,9 +780,11 @@ struct motion_output_report_02 { * additional +2. */ #define DS4_INPUT_REPORT_BUTTON_OFFSET 5 +#define DS4_INPUT_REPORT_GYRO_X_OFFSET 13 #define DS4_INPUT_REPORT_BATTERY_OFFSET 30 #define DS4_INPUT_REPORT_TOUCHPAD_OFFSET 33 +#define DS4_SENSOR_SUFFIX " Motion Sensors" #define DS4_TOUCHPAD_SUFFIX " Touchpad" static DEFINE_SPINLOCK(sony_dev_list_lock); @@ -1074,6 +796,7 @@ struct sony_sc { struct list_head list_node; struct hid_device *hdev; struct input_dev *touchpad; + struct input_dev *sensor_dev; struct led_classdev *leds[MAX_LEDS]; unsigned long quirks; struct work_struct state_worker; @@ -1227,15 +950,11 @@ static u8 *sony_report_fixup(struct hid_device *hdev, u8 *rdesc, } /* - * The default Dualshock 4 USB descriptor doesn't assign - * the gyroscope values to corresponding axes so we need a - * modified one. + * The default Dualshock 4 BT descriptor doesn't describe report ID 17 + * which is most often used for input data. Add this mapping, so we + * use the generic hid code for parsing the buttons and axes. */ - if (sc->quirks & DUALSHOCK4_CONTROLLER_USB) { - hid_info(hdev, "Using modified Dualshock 4 report descriptor with gyroscope axes\n"); - rdesc = dualshock4_usb_rdesc; - *rsize = sizeof(dualshock4_usb_rdesc); - } else if (sc->quirks & DUALSHOCK4_CONTROLLER_BT) { + if (sc->quirks & DUALSHOCK4_CONTROLLER_BT) { hid_info(hdev, "Using modified Dualshock 4 Bluetooth report descriptor\n"); rdesc = dualshock4_bt_rdesc; *rsize = sizeof(dualshock4_bt_rdesc); @@ -1295,6 +1014,9 @@ static void dualshock4_parse_report(struct sony_sc *sc, u8 *rd, int size) int n, m, offset, num_touch_data, max_touch_data; u8 cable_state, battery_capacity, battery_charging; + /* Order of hw axes is gyro first, then accelerometer. */ + int axes[6] = {ABS_RX, ABS_RY, ABS_RZ, ABS_X, ABS_Y, ABS_Z}; + /* When using Bluetooth the header is 2 bytes longer, so skip these. */ int data_offset = (sc->quirks & DUALSHOCK4_CONTROLLER_USB) ? 0 : 2; @@ -1302,6 +1024,14 @@ 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); + offset = data_offset + DS4_INPUT_REPORT_GYRO_X_OFFSET; + for (n = 0; n < 6; n++, offset += 2) { + short value = get_unaligned_le16(&rd[offset]); + + input_report_abs(sc->sensor_dev, axes[n], value); + } + input_sync(sc->sensor_dev); + /* * The lower 4 bits of byte 30 (or 32 for BT) contain the battery level * and the 5th bit contains the USB cable state. @@ -1580,6 +1310,76 @@ static void sony_unregister_touchpad(struct sony_sc *sc) sc->touchpad = NULL; } +static int sony_register_sensors(struct sony_sc *sc) +{ + size_t name_sz; + char *name; + int ret; + + sc->sensor_dev = input_allocate_device(); + if (!sc->sensor_dev) + return -ENOMEM; + + input_set_drvdata(sc->sensor_dev, sc); + sc->sensor_dev->dev.parent = &sc->hdev->dev; + sc->sensor_dev->phys = sc->hdev->phys; + sc->sensor_dev->uniq = sc->hdev->uniq; + sc->sensor_dev->id.bustype = sc->hdev->bus; + sc->sensor_dev->id.vendor = sc->hdev->vendor; + sc->sensor_dev->id.product = sc->hdev->product; + sc->sensor_dev->id.version = sc->hdev->version; + + /* Append a suffix to the controller name as there are various + * DS4 compatible non-Sony devices with different names. + */ + name_sz = strlen(sc->hdev->name) + sizeof(DS4_SENSOR_SUFFIX); + name = kzalloc(name_sz, GFP_KERNEL); + if (!name) { + ret = -ENOMEM; + goto err; + } + snprintf(name, name_sz, "%s" DS4_SENSOR_SUFFIX, sc->hdev->name); + sc->sensor_dev->name = name; + + input_set_abs_params(sc->sensor_dev, ABS_X, -32768, 32767, 0, 0); + input_set_abs_params(sc->sensor_dev, ABS_Y, -32768, 32767, 0, 0); + input_set_abs_params(sc->sensor_dev, ABS_Z, -32768, 32767, 0, 0); + + input_set_abs_params(sc->sensor_dev, ABS_RX, -32768, 32767, 0, 0); + input_set_abs_params(sc->sensor_dev, ABS_RY, -32768, 32767, 0, 0); + input_set_abs_params(sc->sensor_dev, ABS_RZ, -32768, 32767, 0, 0); + + __set_bit(INPUT_PROP_ACCELEROMETER, sc->sensor_dev->propbit); + + ret = input_register_device(sc->sensor_dev); + if (ret < 0) + goto err; + + return 0; + +err: + kfree(sc->sensor_dev->name); + sc->sensor_dev->name = NULL; + + input_free_device(sc->sensor_dev); + sc->sensor_dev = NULL; + + return ret; +} + +static void sony_unregister_sensors(struct sony_sc *sc) +{ + if (!sc->sensor_dev) + return; + + kfree(sc->sensor_dev->name); + sc->sensor_dev->name = NULL; + + input_unregister_device(sc->sensor_dev); + sc->sensor_dev = NULL; +} + + /* * Sending HID_REQ_GET_REPORT changes the operation mode of the ps3 controller * to "operational". Without this, the ps3 controller will not report any @@ -2585,6 +2385,13 @@ static int sony_input_configured(struct hid_device *hdev, goto err_stop; } + ret = sony_register_sensors(sc); + if (ret) { + hid_err(sc->hdev, + "Unable to initialize motion sensors: %d\n", ret); + goto err_stop; + } + sony_init_output_report(sc, dualshock4_send_output_report); } else if (sc->quirks & MOTION_CONTROLLER) { sony_init_output_report(sc, motion_send_output_report); @@ -2719,6 +2526,12 @@ static void sony_remove(struct hid_device *hdev) if (sc->touchpad) sony_unregister_touchpad(sc); + if (sc->sensor_dev) + sony_unregister_sensors(sc); + + if (sc->sensor_dev) + sony_unregister_sensors(sc); + sony_cancel_work_sync(sc); kfree(sc->output_report_dmabuf); diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h index e794f7bee22f..f561c0eb7d63 100644 --- a/include/uapi/linux/input.h +++ b/include/uapi/linux/input.h @@ -61,9 +61,14 @@ struct input_id { * Note that input core does not clamp reported values to the * [minimum, maximum] limits, such task is left to userspace. * - * Resolution for main axes (ABS_X, ABS_Y, ABS_Z) is reported in - * units per millimeter (units/mm), resolution for rotational axes - * (ABS_RX, ABS_RY, ABS_RZ) is reported in units per radian. + * The default resolution for main axes (ABS_X, ABS_Y, ABS_Z) + * is reported in units per millimeter (units/mm), resolution + * for rotational axes (ABS_RX, ABS_RY, ABS_RZ) is reported + * in units per radian. + * When INPUT_PROP_ACCELEROMETER is set the resolution changes. + * The main axes (ABS_X, ABS_Y, ABS_Z) are then reported in + * in units per g (units/g) and in units per degree per second + * (units/deg/s) for rotational axes (ABS_RX, ABS_RY, ABS_RZ). */ struct input_absinfo { __s32 value;