HID: alps: add support for Alps T4 Touchpad device
- Define T4 device specification value for support T4 device.
- Creeate "t4_contact_data" and "t4_input_report" structure for decoding and
storing T4-specific data
- Create "t4_calc_check_sum()" function for calculating checksum value to send
to the device. T4 needs to send this value when reading or writing device
address value.
- Create "t4_read_write_register()" function for reading and writing device
address value.
- Create "t4_raw_event()" function for decodin XYZ, palm and button data.
- Replace "MAX_TOUCHES" fixed variable to "max_fingers" variable.
- Add T4 devuce product ID. (0x120C)
T4 device is used on HP EliteBook 1000 series and Zbook Stduio
[jkosina@suse.cz: rewrite changelog]
Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index be2e005..edc9f2a 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -77,6 +77,8 @@
#define HID_DEVICE_ID_ALPS_U1_DUAL 0x120B
#define HID_DEVICE_ID_ALPS_U1_DUAL_PTP 0x121F
#define HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP 0x1220
+#define HID_DEVICE_ID_ALPS_T4_BTNLESS 0x120C
+
#define USB_VENDOR_ID_AMI 0x046b
#define USB_DEVICE_ID_AMI_VIRT_KEYBOARD_AND_MOUSE 0xff10