* RE: Support Alps I2C HID Touchpad-Stick device
2016-05-25 2:33 Support Alps I2C HID Touchpad-Stick device Masaki Ota
@ 2016-05-25 2:41 ` Masaki Ota
2016-05-26 0:15 ` dmitry.torokhov
0 siblings, 1 reply; 3+ messages in thread
From: Masaki Ota @ 2016-05-25 2:41 UTC (permalink / raw)
To: jikos@kernel.org, benjamin.tissorires@redhat.com
Cc: linux-input@vger.kernel.org, peter.hutterer@who-t.net,
hdegoede@redhat.com, dmitry.torokhov@gmail.com
[-- Attachment #1: Type: text/plain, Size: 704 bytes --]
Best Regards,
-----------------------------
Masaki Ota
Engineering Dept.M8
Alps Electric Co., Ltd.
Tel: +81-246-58-6464
Fax: +81-246-58-8326
-----------------------------
-----Original Message-----
From: Masaki Ota [mailto:012nexus@gmail.com]
Sent: Wednesday, May 25, 2016 11:34 AM
To: jikos@kernel.org; benjamin.tissorires@redhat.com
Cc: linux-input@vger.kernel.org; peter.hutterer@who-t.net; hdegoede@redhat.com; dmitry.torokhov@gmail.com; 太田 真喜 Masaki Ota
Subject: Support Alps I2C HID Touchpad-Stick device
Hi, all,
Here is the patch for Alps I2C HID Touchpad-Stick support.
Most of this device is attached in Dell laptop PC of this year model.
Masaki Ota
[-- Attachment #2: 0001-Alps-I2C-HID-Touchpad-Stick-support.patch --]
[-- Type: application/octet-stream, Size: 16158 bytes --]
From 532401b8216f156f2a00d95fa761cd7f951506d2 Mon Sep 17 00:00:00 2001
From: Masaki Ota <masaki.ota@jp.alps.com>
Date: Tue, 24 May 2016 19:24:46 +0900
Subject: [PATCH] Alps I2C HID Touchpad-Stick support
Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
---
drivers/hid/Makefile | 1 +
drivers/hid/hid-alps.c | 513 +++++++++++++++++++++++++++++++++++++++++++++++++
drivers/hid/hid-core.c | 5 +
drivers/hid/hid-ids.h | 2 +
include/linux/hid.h | 1 +
5 files changed, 522 insertions(+)
create mode 100644 drivers/hid/hid-alps.c
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 00011fe..31e493a 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -21,6 +21,7 @@ hid-wiimote-y := hid-wiimote-core.o hid-wiimote-modules.o
hid-wiimote-$(CONFIG_DEBUG_FS) += hid-wiimote-debug.o
obj-$(CONFIG_HID_A4TECH) += hid-a4tech.o
+obj-$(CONFIG_HID_ALPS) += hid-alps.o
obj-$(CONFIG_HID_ACRUX) += hid-axff.o
obj-$(CONFIG_HID_APPLE) += hid-apple.o
obj-$(CONFIG_HID_APPLEIR) += hid-appleir.o
diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c
new file mode 100644
index 0000000..328571a
--- /dev/null
+++ b/drivers/hid/hid-alps.c
@@ -0,0 +1,513 @@
+/*
+ * Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/module.h>
+#include "hid-ids.h"
+
+/* ALPS Device Product ID */
+#define HID_PRODUCT_ID_T3_BTNLESS 0xD0C0
+#define HID_PRODUCT_ID_COSMO 0x1202
+#define HID_PRODUCT_ID_U1_PTP_1 0x1207
+#define HID_PRODUCT_ID_U1 0x1209
+#define HID_PRODUCT_ID_U1_PTP_2 0x120A
+#define HID_PRODUCT_ID_U1_DUAL 0x120B
+#define HID_PRODUCT_ID_T4_BTNLESS 0x120C
+
+#define DEV_SINGLEPOINT 0x01
+#define DEV_DUALPOINT 0x02
+
+#define U1_MOUSE_REPORT_ID 0x01 /* Mouse data ReportID */
+#define U1_ABSOLUTE_REPORT_ID 0x03 /* Absolute data ReportID */
+#define U1_FEATURE_REPORT_ID 0x05 /* Feature ReportID */
+#define U1_SP_ABSOLUTE_REPORT_ID 0x06 /* Feature ReportID */
+
+#define U1_FEATURE_REPORT_LEN 0x08 /* Feature Report Length */
+#define U1_FEATURE_REPORT_LEN_ALL 0x0A
+#define U1_CMD_REGISTER_READ 0xD1
+#define U1_CMD_REGISTER_WRITE 0xD2
+
+#define U1_DEVTYPE_SP_SUPPORT 0x10 /* SP Support */
+#define U1_DISABLE_DEV 0x01
+#define U1_TP_ABS_MODE 0x02
+#define U1_SP_ABS_MODE 0x80
+
+#define ADDRESS_U1_DEV_CTRL_1 0x00800040
+#define ADDRESS_U1_DEVICE_TYP 0x00800043
+#define ADDRESS_U1_NUM_SENS_X 0x00800047
+#define ADDRESS_U1_NUM_SENS_Y 0x00800048
+#define ADDRESS_U1_PITCH_SENS_X 0x00800049
+#define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
+#define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
+#define ADDRESS_U1_PAD_BTN 0x00800052
+#define ADDRESS_U1_SP_BTN 0x0080009F
+
+#define MAX_TOUCHES 5
+
+/**
+ * struct u1_data
+ *
+ * @input: pointer to the kernel input device
+ * @input2: pointer to the kernel input2 device
+ * @hdev: pointer to the struct hid_device
+ *
+ * @dev_ctrl: device control parameter
+ * @dev_type: device type
+ * @sen_line_num_x: number of sensor line of X
+ * @sen_line_num_y: number of sensor line of Y
+ * @pitch_x: sensor pitch of X
+ * @pitch_y: sensor pitch of Y
+ * @resolution: resolution
+ * @btn_info: button information
+ * @x_active_len_mm: active area length of X (mm)
+ * @y_active_len_mm: active area length of Y (mm)
+ * @x_max: maximum x coordinate value
+ * @y_max: maximum y coordinate value
+ * @btn_cnt: number of buttons
+ * @sp_btn_cnt: number of stick buttons
+ */
+struct u1_dev {
+ struct input_dev *input;
+ struct input_dev *input2;
+ struct hid_device *hdev;
+
+ u8 dev_ctrl;
+ u8 dev_type;
+ u8 sen_line_num_x;
+ u8 sen_line_num_y;
+ u8 pitch_x;
+ u8 pitch_y;
+ u8 resolution;
+ u8 btn_info;
+ u8 sp_btn_info;
+ u32 x_active_len_mm;
+ u32 y_active_len_mm;
+ u32 x_max;
+ u32 y_max;
+ u32 btn_cnt;
+ u32 sp_btn_cnt;
+};
+
+struct u1_dev *priv;
+
+static int u1_write_register(struct hid_device *hdev, u32 address, u8 value)
+{
+ int ret, i;
+ u8 input[8];
+ u8 check_sum;
+
+ input[0] = U1_FEATURE_REPORT_ID;
+ input[1] = U1_CMD_REGISTER_WRITE;
+ input[2] = address & 0x000000FF;
+ input[3] = (address & 0x0000FF00) >> 8;
+ input[4] = (address & 0x00FF0000) >> 16;
+ input[5] = (address & 0xFF000000) >> 24;
+ input[6] = value;
+
+ /* Calculate the checksum */
+ check_sum = U1_FEATURE_REPORT_LEN_ALL;
+ for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
+ check_sum += input[i];
+
+ input[7] = check_sum;
+
+ ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
+ sizeof(input), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed to write register (%d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int u1_read_register(struct hid_device *hdev, u32 address, u8 *value)
+{
+ int ret, i;
+ u8 input[8];
+ u8 readbuf[8];
+ u8 check_sum;
+
+ input[0] = U1_FEATURE_REPORT_ID;
+ input[1] = U1_CMD_REGISTER_READ;
+ input[2] = address & 0x000000FF;
+ input[3] = (address & 0x0000FF00) >> 8;
+ input[4] = (address & 0x00FF0000) >> 16;
+ input[5] = (address & 0xFF000000) >> 24;
+ input[6] = 0x00;
+
+ /* Calculate the checksum */
+ check_sum = U1_FEATURE_REPORT_LEN_ALL;
+ for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
+ check_sum += input[i];
+
+ input[7] = check_sum;
+
+ ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
+ sizeof(input), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
+ return ret;
+ }
+
+ ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
+ sizeof(readbuf), HID_FEATURE_REPORT,
+ HID_REQ_GET_REPORT);
+
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed to read register (%d)\n", ret);
+ return ret;
+ }
+
+ *value = readbuf[6];
+
+ return 0;
+}
+
+static int alps_raw_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *data, int size)
+{
+ int x[MAX_TOUCHES], y[MAX_TOUCHES], z[MAX_TOUCHES];
+ int i, left, right, middle;
+ short sp_x, sp_y, sp_z;
+ struct u1_dev *hdata = hid_get_drvdata(hdev);
+
+ switch (data[0]) {
+ case U1_MOUSE_REPORT_ID:
+ break;
+ case U1_FEATURE_REPORT_ID:
+ break;
+ case U1_ABSOLUTE_REPORT_ID:
+ for (i = 0; i < MAX_TOUCHES; i++) {
+ x[i] = (data[3+(5*i)] | (data[4+(5*i)] << 8));
+ y[i] = (data[5+(5*i)] | (data[6+(5*i)] << 8));
+ z[i] = data[7+(5*i)] & 0x7F;
+ left = data[1] & 0x1;
+ right = (data[1] & 0x2) >> 1;
+ middle = (data[1] & 0x4) >> 2;
+
+ input_mt_slot(hdata->input, i);
+
+ if (z[i] != 0) {
+ input_mt_report_slot_state(hdata->input,
+ MT_TOOL_FINGER, 1);
+ } else {
+ input_mt_report_slot_state(hdata->input,
+ MT_TOOL_FINGER, 0);
+ break;
+ }
+
+ input_event(hdata->input, EV_ABS,
+ ABS_MT_POSITION_X, x[i]);
+ input_event(hdata->input, EV_ABS,
+ ABS_MT_POSITION_Y, y[i]);
+ input_event(hdata->input, EV_ABS,
+ ABS_MT_PRESSURE, z[i]);
+ }
+
+ input_mt_sync_frame(hdata->input);
+ input_sync(hdata->input);
+
+ input_event(hdata->input, EV_KEY, BTN_LEFT, left);
+ input_event(hdata->input, EV_KEY, BTN_RIGHT, right);
+ input_event(hdata->input, EV_KEY, BTN_MIDDLE, middle);
+
+ input_sync(hdata->input);
+
+ return 1;
+
+ case U1_SP_ABSOLUTE_REPORT_ID:
+ sp_x = (data[2] | (data[3] << 8));
+ sp_y = (data[4] | (data[5] << 8));
+ sp_z = (data[6] | data[7]) & 0x7FFF;
+ left = data[1] & 0x1;
+ right = (data[1] & 0x2) >> 1;
+ middle = (data[1] & 0x4) >> 2;
+
+ sp_x = sp_x / 8;
+ sp_y = sp_y / 8;
+
+ input_event(priv->input2, EV_REL, REL_X, sp_x);
+ input_event(priv->input2, EV_REL, REL_Y, sp_y);
+
+ input_event(priv->input2, EV_KEY, BTN_LEFT, left);
+ input_event(priv->input2, EV_KEY, BTN_RIGHT, right);
+ input_event(priv->input2, EV_KEY, BTN_MIDDLE, middle);
+
+ input_sync(priv->input2);
+
+ return 1;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int alps_post_reset(struct hid_device *hdev)
+{
+ return u1_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, U1_TP_ABS_MODE);
+}
+
+static int alps_post_resume(struct hid_device *hdev)
+{
+ return u1_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, U1_TP_ABS_MODE);
+}
+#endif /* CONFIG_PM */
+
+static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
+{
+ struct u1_dev *data = hid_get_drvdata(hdev);
+ struct input_dev *input = hi->input, *input2;
+ struct u1_dev devInfo;
+ int ret;
+ int res_x, res_y, i;
+
+ /* Check device product ID*/
+ switch (hdev->product) {
+ case HID_PRODUCT_ID_U1:
+ case HID_PRODUCT_ID_U1_DUAL:
+ break;
+ default:
+ return 0;
+ }
+
+ priv = kzalloc(sizeof(struct u1_dev), GFP_KERNEL);
+ input2 = input_allocate_device();
+ if (!priv || !input2)
+ return 0;
+
+ priv->input2 = input2;
+ data->input = input;
+
+ hid_dbg(hdev, "Opening low level driver\n");
+ ret = hid_hw_open(hdev);
+ if (ret)
+ return ret;
+
+ /* Allow incoming hid reports */
+ hid_device_io_start(hdev);
+
+ /* Device initialization */
+ ret = u1_read_register(hdev, ADDRESS_U1_DEV_CTRL_1, &devInfo.dev_ctrl);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
+ goto exit;
+ }
+
+ devInfo.dev_ctrl &= ~U1_DISABLE_DEV;
+ devInfo.dev_ctrl |= U1_TP_ABS_MODE;
+ ret = u1_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, devInfo.dev_ctrl);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = u1_read_register(hdev, ADDRESS_U1_NUM_SENS_X,
+ &devInfo.sen_line_num_x);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = u1_read_register(hdev, ADDRESS_U1_NUM_SENS_Y,
+ &devInfo.sen_line_num_y);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = u1_read_register(hdev, ADDRESS_U1_PITCH_SENS_X, &devInfo.pitch_x);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = u1_read_register(hdev, ADDRESS_U1_PITCH_SENS_Y, &devInfo.pitch_y);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = u1_read_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
+ &devInfo.resolution);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = u1_read_register(hdev, ADDRESS_U1_PAD_BTN, &devInfo.btn_info);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
+ goto exit;
+ }
+
+ /* Check StickPointer device */
+ ret = u1_read_register(hdev, ADDRESS_U1_DEVICE_TYP, &devInfo.dev_type);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
+ goto exit;
+ }
+
+ devInfo.x_active_len_mm =
+ (devInfo.pitch_x * (devInfo.sen_line_num_x - 1)) / 10;
+ devInfo.y_active_len_mm =
+ (devInfo.pitch_y * (devInfo.sen_line_num_y - 1)) / 10;
+
+ devInfo.x_max =
+ (devInfo.resolution << 2) * (devInfo.sen_line_num_x - 1);
+ devInfo.y_max =
+ (devInfo.resolution << 2) * (devInfo.sen_line_num_y - 1);
+
+ __set_bit(EV_ABS, input->evbit);
+ input_set_abs_params(input, ABS_MT_POSITION_X, 1, devInfo.x_max, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 1, devInfo.y_max, 0, 0);
+
+ if (devInfo.x_active_len_mm && devInfo.y_active_len_mm) {
+ res_x = (devInfo.x_max - 1) / devInfo.x_active_len_mm;
+ res_y = (devInfo.y_max - 1) / devInfo.y_active_len_mm;
+
+ input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
+ input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
+ }
+
+ input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
+
+ input_mt_init_slots(input, MAX_TOUCHES, INPUT_MT_POINTER);
+
+ __set_bit(EV_KEY, input->evbit);
+ if ((devInfo.btn_info & 0x0F) == (devInfo.btn_info & 0xF0) >> 4) {
+ devInfo.btn_cnt = (devInfo.btn_info & 0x0F);
+ } else {
+ /* Button pad */
+ devInfo.btn_cnt = 1;
+ __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
+ }
+
+ for (i = 0; i < devInfo.btn_cnt; i++)
+ __set_bit(BTN_LEFT + i, input->keybit);
+
+
+ /* Stick device initialization */
+ if (devInfo.dev_type & U1_DEVTYPE_SP_SUPPORT) {
+ devInfo.dev_ctrl |= U1_SP_ABS_MODE;
+ ret = u1_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
+ devInfo.dev_ctrl);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = u1_read_register(hdev, ADDRESS_U1_SP_BTN,
+ &devInfo.sp_btn_info);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
+ goto exit;
+ }
+
+ input2->phys = input->phys;
+ input2->name = "DualPoint Stick";
+ input2->id.bustype = BUS_I2C;
+ input2->id.vendor = input->id.vendor;
+ input2->id.product = input->id.product;
+ input2->id.version = input->id.version;
+ input2->dev.parent = input->dev.parent;
+
+ __set_bit(EV_KEY, input2->evbit);
+ devInfo.sp_btn_cnt = (devInfo.sp_btn_info & 0x0F);
+ for (i = 0; i < devInfo.sp_btn_cnt; i++)
+ __set_bit(BTN_LEFT + i, input2->keybit);
+
+ __set_bit(EV_REL, input2->evbit);
+ __set_bit(REL_X, input2->relbit);
+ __set_bit(REL_Y, input2->relbit);
+ __set_bit(INPUT_PROP_POINTER, input2->propbit);
+ __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
+
+ if (input_register_device(priv->input2))
+ goto exit;
+ }
+
+exit:
+ input_free_device(input2);
+ hid_device_io_stop(hdev);
+ hid_hw_close(hdev);
+ return ret;
+}
+
+static int alps_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi, struct hid_field *field,
+ struct hid_usage *usage, unsigned long **bit, int *max)
+{
+ return -1;
+}
+
+static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ struct u1_dev *data = NULL;
+ int ret;
+
+ data = devm_kzalloc(&hdev->dev, sizeof(struct u1_dev), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->hdev = hdev;
+ hid_set_drvdata(hdev, data);
+
+ hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "parse failed\n");
+ return ret;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret) {
+ hid_err(hdev, "hw start failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void alps_remove(struct hid_device *hdev)
+{
+ hid_hw_stop(hdev);
+}
+
+static const struct hid_device_id alps_id[] = {
+ { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ALPS, HID_ANY_ID, HID_ANY_ID) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, alps_id);
+
+static struct hid_driver alps_driver = {
+ .name = "hid-alps",
+ .id_table = alps_id,
+ .probe = alps_probe,
+ .remove = alps_remove,
+ .raw_event = alps_raw_event,
+ .input_mapping = alps_input_mapping,
+ .input_configured = alps_input_configured,
+#ifdef CONFIG_PM
+ .resume = alps_post_resume,
+ .reset_resume = alps_post_reset,
+#endif
+};
+
+module_hid_driver(alps_driver);
+
+MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
+MODULE_DESCRIPTION("ALPS HID driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 7e89288..124fc38 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -833,6 +833,11 @@ static int hid_scan_report(struct hid_device *hid)
*/
hid->group = HID_GROUP_RMI;
break;
+ case USB_VENDOR_ID_ALPS_JP:
+ if ((hid->group == HID_GROUP_GENERIC) &&
+ (hid->bus == BUS_I2C))
+ hid->group = HID_GROUP_ALPS;
+ break;
}
vfree(parser);
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index b6ff6e7..cac68c7 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -67,6 +67,8 @@
#define USB_VENDOR_ID_ALPS 0x0433
#define USB_DEVICE_ID_IBM_GAMEPAD 0x1101
+#define USB_VENDOR_ID_ALPS_JP 0x044E
+
#define USB_VENDOR_ID_ANTON 0x1130
#define USB_DEVICE_ID_ANTON_TOUCH_PAD 0x3101
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 75b66ec..e35cabf 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -345,6 +345,7 @@ struct hid_item {
#define HID_GROUP_RMI 0x0100
#define HID_GROUP_WACOM 0x0101
#define HID_GROUP_LOGITECH_DJ_DEVICE 0x0102
+#define HID_GROUP_ALPS 0x0103
/*
* This is the global environment of the parser. This information is
--
2.7.4
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