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Subject[PATCH 7/7] Support Alps U1 USB Touchpad device
Date
From: Masaki Ota <masaki.ota@jp.alps.com>
-Add T4 USB device Product ID. (0x1216)
-Separate T4 USB device initialization code from T4 Standard device code.
-T4 USB device is used on HP Elite x2 series

Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
---
drivers/hid/hid-alps.c | 35 +++++++++++++++++++++++++----------
drivers/hid/hid-core.c | 1 +
drivers/hid/hid-ids.h | 1 +
3 files changed, 27 insertions(+), 10 deletions(-)

diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c
index 18ec1ef57b2c..8bc079ba9cc5 100644
--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c
@@ -440,6 +440,7 @@ static int alps_raw_event(struct hid_device *hdev,

switch (hdev->product) {
case HID_PRODUCT_ID_T4_BTNLESS:
+ case HID_DEVICE_ID_ALPS_T4_USB:
ret = t4_raw_event(hdata, data, size);
break;
default:
@@ -594,13 +595,29 @@ static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
int ret;
u8 tmp, sen_line_num_x, sen_line_num_y;

- ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
- if (ret < 0) {
- dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
+ if (hdev->product == HID_DEVICE_ID_ALPS_T4_BTNLESS) {
+ ret = t4_read_write_register(hdev,
+ T4_PRM_ID_CONFIG_3, &tmp, 0, true);
+ if (ret < 0) {
+ dev_err(&hdev->dev,
+ "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
goto exit;
+ }
+ sen_line_num_x = 16 + ((tmp & 0x0F) | (tmp & 0x08 ? 0xF0 : 0));
+ sen_line_num_y =
+ 12 + (((tmp & 0xF0) >> 4) | (tmp & 0x80 ? 0xF0 : 0));
+
+ ret = t4_read_write_register(hdev,
+ PRM_SYS_CONFIG_1, &tmp, 0, true);
+ if (ret < 0) {
+ dev_err(&hdev->dev,
+ "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
+ goto exit;
+ }
+ } else {
+ sen_line_num_x = 20;
+ sen_line_num_y = 12;
}
- sen_line_num_x = 16 + ((tmp & 0x0F) | (tmp & 0x08 ? 0xF0 : 0));
- sen_line_num_y = 12 + (((tmp & 0xF0) >> 4) | (tmp & 0x80 ? 0xF0 : 0));

pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
pri_data->x_min = T4_COUNT_PER_ELECTRODE;
@@ -609,11 +626,6 @@ static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
pri_data->btn_cnt = 1;

- ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
- if (ret < 0) {
- dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
- goto exit;
- }
tmp |= 0x02;
ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
if (ret < 0) {
@@ -764,6 +776,7 @@ static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)

switch (hdev->product) {
case HID_DEVICE_ID_ALPS_T4_BTNLESS:
+ case HID_DEVICE_ID_ALPS_T4_USB:
data->dev_type = T4;
break;
case HID_DEVICE_ID_ALPS_U1_DUAL:
@@ -795,6 +808,8 @@ static const struct hid_device_id alps_id[] = {
USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
+ { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
+ USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_USB) },
{ }
};
MODULE_DEVICE_TABLE(hid, alps_id);
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 779e26cb3ba9..13ded460885e 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1777,6 +1777,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
{ HID_I2C_DEVICE(USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
{ HID_I2C_DEVICE(USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
{ HID_I2C_DEVICE(USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_USB) },
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 2b50d12b993e..71c2a021e296 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -76,6 +76,7 @@
#define USB_VENDOR_ID_ALPS_JP 0x044E
#define HID_DEVICE_ID_ALPS_U1_DUAL 0x120B
#define HID_DEVICE_ID_ALPS_U1 0x1215
+#define HID_DEVICE_ID_ALPS_T4_USB 0x1216
#define HID_DEVICE_ID_ALPS_T4_BTNLESS 0x120C

#define USB_VENDOR_ID_AMI 0x046b
--
2.11.0
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