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Message-Id: <20171006025319.2505-6-masaki.ota@jp.alps.com>
Date: Fri, 6 Oct 2017 11:53:17 +0900
From: Masaki Ota <012nexus@...il.com>
To: jikos@...nel.org, benjamin.tissoires@...hat.com
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
masaki.ota@...alps.com
Subject: [PATCH 5/7] Support Alps T4 Touchpad device
From: Masaki Ota <masaki.ota@...alps.com>
-Define T4 device specification value for support T4 device.
-Create "t4_contact_data" and "t4_input_report" structure for decode T4 data and store it.
-Create "t4_calc_check_sum()" function for calculate checksum value to send the device. T4 needs to send this value when read/write device address value.
-Create "t4_read_write_register()" function for read/write device address value.
-Create "t4_raw_event()" function for decode device XYZ data, 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
Signed-off-by: Masaki Ota <masaki.ota@...alps.com>
---
drivers/hid/hid-alps.c | 339 ++++++++++++++++++++++++++++++++++++++++++++++---
drivers/hid/hid-core.c | 3 +-
drivers/hid/hid-ids.h | 1 +
3 files changed, 322 insertions(+), 21 deletions(-)
diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c
index 4c323b58e009..5ae2cba8fe76 100644
--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c
@@ -52,8 +52,30 @@
#define ADDRESS_U1_PAD_BTN 0x00800052
#define ADDRESS_U1_SP_BTN 0x0080009F
+#define T4_INPUT_REPORT_LEN sizeof(struct t4_input_report)
+#define T4_FEATURE_REPORT_LEN T4_INPUT_REPORT_LEN
+#define T4_FEATURE_REPORT_ID 7
+#define T4_CMD_REGISTER_READ 0x08
+#define T4_CMD_REGISTER_WRITE 0x07
+
+#define T4_ADDRESS_BASE 0xC2C0
+#define PRM_SYS_CONFIG_1 (T4_ADDRESS_BASE + 0x0002)
+#define T4_PRM_FEED_CONFIG_1 (T4_ADDRESS_BASE + 0x0004)
+#define T4_PRM_FEED_CONFIG_4 (T4_ADDRESS_BASE + 0x001A)
+#define T4_PRM_ID_CONFIG_3 (T4_ADDRESS_BASE + 0x00B0)
+
+
+#define T4_FEEDCFG4_ADVANCED_ABS_ENABLE 0x01
+#define T4_I2C_ABS 0x78
+
+#define T4_COUNT_PER_ELECTRODE 256
#define MAX_TOUCHES 5
+enum dev_num {
+ U1,
+ T4,
+ UNKNOWN,
+};
/**
* struct u1_data
*
@@ -74,11 +96,12 @@
* @btn_cnt: number of buttons
* @sp_btn_cnt: number of stick buttons
*/
-struct u1_dev {
+struct alps_dev {
struct input_dev *input;
struct input_dev *input2;
struct hid_device *hdev;
+ enum dev_num dev_type;
u8 max_fingers;
u8 has_sp;
u8 sp_btn_info;
@@ -92,6 +115,141 @@ struct u1_dev {
u32 sp_btn_cnt;
};
+struct t4_contact_data {
+ u8 palm;
+ u8 x_lo;
+ u8 x_hi;
+ u8 y_lo;
+ u8 y_hi;
+};
+
+struct t4_input_report {
+ u8 reportID;
+ u8 numContacts;
+ struct t4_contact_data contact[5];
+ u8 button;
+ u8 track[5];
+ u8 zx[5], zy[5];
+ u8 palmTime[5];
+ u8 kilroy;
+ u16 timeStamp;
+};
+
+static u16 t4_calc_check_sum(u8 *buffer,
+ unsigned long offset, unsigned long length)
+{
+ u16 sum1 = 0xFF, sum2 = 0xFF;
+ unsigned long i = 0;
+
+ if (offset + length >= 50)
+ return 0;
+
+ while (length > 0) {
+ u32 tlen = length > 20 ? 20 : length;
+
+ length -= tlen;
+
+ do {
+ sum1 += buffer[offset + i];
+ sum2 += sum1;
+ i++;
+ } while (--tlen > 0);
+
+ sum1 = (sum1 & 0xFF) + (sum1 >> 8);
+ sum2 = (sum2 & 0xFF) + (sum2 >> 8);
+ }
+
+ sum1 = (sum1 & 0xFF) + (sum1 >> 8);
+ sum2 = (sum2 & 0xFF) + (sum2 >> 8);
+
+ return(sum2 << 8 | sum1);
+}
+
+static int t4_read_write_register(struct hid_device *hdev, u32 address,
+ u8 *read_val, u8 write_val, bool read_flag)
+{
+ int ret;
+ u16 check_sum;
+ u8 *input;
+ u8 *readbuf;
+
+ input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
+ if (!input)
+ return -ENOMEM;
+
+ input[0] = T4_FEATURE_REPORT_ID;
+ if (read_flag) {
+ input[1] = T4_CMD_REGISTER_READ;
+ input[8] = 0x00;
+ } else {
+ input[1] = T4_CMD_REGISTER_WRITE;
+ input[8] = write_val;
+ }
+ put_unaligned_le32(address, input + 2);
+ input[6] = 1;
+ input[7] = 0;
+
+ /* Calculate the checksum */
+ check_sum = t4_calc_check_sum(input, 1, 8);
+ input[9] = (u8)check_sum;
+ input[10] = (u8)(check_sum >> 8);
+ input[11] = 0;
+
+ ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
+ T4_FEATURE_REPORT_LEN,
+ HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
+ goto exit;
+ }
+
+ readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
+ if (read_flag) {
+ if (!readbuf) {
+ ret = -ENOMEM;
+ goto exit;
+ }
+
+ ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
+ T4_FEATURE_REPORT_LEN,
+ HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed read register (%d)\n", ret);
+ goto exit_readbuf;
+ }
+
+ if (*(u32 *)&readbuf[6] != address) {
+ dev_err(&hdev->dev, "read register address error (%x,%x)\n",
+ *(u32 *)&readbuf[6], address);
+ goto exit_readbuf;
+ }
+
+ if (*(u16 *)&readbuf[10] != 1) {
+ dev_err(&hdev->dev, "read register size error (%x)\n",
+ *(u16 *)&readbuf[10]);
+ goto exit_readbuf;
+ }
+
+ check_sum = t4_calc_check_sum(readbuf, 6, 7);
+ if (*(u16 *)&readbuf[13] != check_sum) {
+ dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
+ *(u16 *)&readbuf[13], check_sum);
+ goto exit_readbuf;
+ }
+
+ *read_val = readbuf[12];
+ }
+
+ ret = 0;
+
+exit_readbuf:
+ kfree(readbuf);
+exit:
+ kfree(input);
+ return ret;
+}
+
static int u1_read_write_register(struct hid_device *hdev, u32 address,
u8 *read_val, u8 write_val, bool read_flag)
{
@@ -159,21 +317,60 @@ static int u1_read_write_register(struct hid_device *hdev, u32 address,
return ret;
}
-static int alps_raw_event(struct hid_device *hdev,
- struct hid_report *report, u8 *data, int size)
+static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
+{
+ unsigned int x, y, z;
+ int i;
+ struct t4_input_report *p_report = (struct t4_input_report *)data;
+
+ if (!data)
+ return 0;
+ for (i = 0; i < hdata->max_fingers; i++) {
+ x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
+ y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
+ y = hdata->y_max - y + hdata->y_min;
+ z = (p_report->contact[i].palm < 0x80 &&
+ p_report->contact[i].palm > 0) * 62;
+ if (x == 0xffff) {
+ x = 0;
+ y = 0;
+ z = 0;
+ }
+ input_mt_slot(hdata->input, i);
+
+ input_mt_report_slot_state(hdata->input,
+ MT_TOOL_FINGER, z != 0);
+
+ if (!z)
+ continue;
+
+ input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
+ input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
+ input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
+ }
+ input_mt_sync_frame(hdata->input);
+
+ input_report_key(hdata->input, BTN_LEFT, p_report->button);
+
+ input_sync(hdata->input);
+ return 1;
+}
+
+static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
{
unsigned int x, y, z;
int i;
short sp_x, sp_y;
- struct u1_dev *hdata = hid_get_drvdata(hdev);
+ if (!data)
+ return 0;
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++) {
+ for (i = 0; i < hdata->max_fingers; i++) {
u8 *contact = &data[i * 5];
x = get_unaligned_le16(contact + 3);
@@ -235,21 +432,52 @@ static int alps_raw_event(struct hid_device *hdev,
return 0;
}
-#ifdef CONFIG_PM
-static int alps_post_reset(struct hid_device *hdev)
+static int alps_raw_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *data, int size)
{
- return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
- NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
+ int ret = 0;
+ struct alps_dev *hdata = hid_get_drvdata(hdev);
+
+ switch (hdev->product) {
+ case HID_PRODUCT_ID_T4_BTNLESS:
+ ret = t4_raw_event(hdata, data, size);
+ break;
+ default:
+ ret = u1_raw_event(hdata, data, size);
+ break;
+ }
+ return ret;
}
-static int alps_post_resume(struct hid_device *hdev)
+static int __maybe_unused alps_post_reset(struct hid_device *hdev)
{
- return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
- NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
+ int ret = -1;
+ struct alps_dev *data = hid_get_drvdata(hdev);
+
+ switch (data->dev_type) {
+ case T4:
+ ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
+ NULL, T4_I2C_ABS, false);
+ ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
+ NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
+ break;
+ case U1:
+ ret = u1_read_write_register(hdev,
+ ADDRESS_U1_DEV_CTRL_1, NULL,
+ U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static int __maybe_unused alps_post_resume(struct hid_device *hdev)
+{
+ return alps_post_reset(hdev);
}
-#endif /* CONFIG_PM */
-static int u1_init(struct hid_device *hdev, struct u1_dev *pri_data)
+static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
{
int ret;
u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
@@ -361,9 +589,60 @@ static int u1_init(struct hid_device *hdev, struct u1_dev *pri_data)
return ret;
}
+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);
+ 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));
+
+ pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
+ pri_data->x_min = T4_COUNT_PER_ELECTRODE;
+ pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
+ pri_data->y_min = T4_COUNT_PER_ELECTRODE;
+ 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) {
+ dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
+ NULL, T4_I2C_ABS, false);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
+ goto exit;
+ }
+
+ ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
+ T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
+ if (ret < 0) {
+ dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
+ goto exit;
+ }
+ pri_data->max_fingers = 5;
+ pri_data->has_sp = 0;
+exit:
+ return ret;
+}
+
static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
- struct u1_dev *data = hid_get_drvdata(hdev);
+ struct alps_dev *data = hid_get_drvdata(hdev);
struct input_dev *input = hi->input, *input2;
int ret;
int res_x, res_y, i;
@@ -377,8 +656,16 @@ static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
/* Allow incoming hid reports */
hid_device_io_start(hdev);
-
- ret = u1_init(hdev, data);
+ switch (data->dev_type) {
+ case T4:
+ ret = T4_init(hdev, data);
+ break;
+ case U1:
+ ret = u1_init(hdev, data);
+ break;
+ default:
+ break;
+ }
if (ret)
goto exit;
@@ -458,10 +745,9 @@ static int alps_input_mapping(struct hid_device *hdev,
static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
- struct u1_dev *data = NULL;
+ struct alps_dev *data = NULL;
int ret;
-
- data = devm_kzalloc(&hdev->dev, sizeof(struct u1_dev), GFP_KERNEL);
+ data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
if (!data)
return -ENOMEM;
@@ -476,6 +762,17 @@ static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
return ret;
}
+ switch (hdev->product) {
+ case HID_DEVICE_ID_ALPS_T4_BTNLESS:
+ data->dev_type = T4;
+ break;
+ case HID_DEVICE_ID_ALPS_U1_DUAL:
+ data->dev_type = U1;
+ break;
+ default:
+ data->dev_type = UNKNOWN;
+ }
+
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "hw start failed\n");
@@ -493,6 +790,8 @@ static void alps_remove(struct hid_device *hdev)
static const struct hid_device_id alps_id[] = {
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
+ { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
+ USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
{ }
};
MODULE_DEVICE_TABLE(hid, alps_id);
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index ea36b557d5ee..9c3cb2e467e9 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1774,7 +1774,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0xf705) },
- { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
+ { 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_T4_BTNLESS) },
{ 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 350accfee8e8..0b9726d321ee 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -75,6 +75,7 @@
#define USB_VENDOR_ID_ALPS_JP 0x044E
#define HID_DEVICE_ID_ALPS_U1_DUAL 0x120B
+#define HID_DEVICE_ID_ALPS_T4_BTNLESS 0x120C
#define USB_VENDOR_ID_AMI 0x046b
#define USB_DEVICE_ID_AMI_VIRT_KEYBOARD_AND_MOUSE 0xff10
--
2.11.0
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