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HID: alps: add support for Alps T4 Touchpad device

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- 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>
This commit is contained in:
Masaki Ota 2017-10-06 11:53:17 +09:00 committed by Jiri Kosina
parent 5992262d59
commit 73196ebe13
3 changed files with 324 additions and 21 deletions
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341
drivers/hid/hid-alps.c
View File

@ -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);
}
#endif /* CONFIG_PM */
int ret = -1;
struct alps_dev *data = hid_get_drvdata(hdev);
static int u1_init(struct hid_device *hdev, struct u1_dev *pri_data)
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);
}
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);

2
drivers/hid/hid-core.c
View File

@ -1889,6 +1889,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
#endif
#if IS_ENABLED(CONFIG_HID_ALPS)
{ 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) },
#endif
#if IS_ENABLED(CONFIG_HID_APPLE)
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },

2
drivers/hid/hid-ids.h
View File

@ -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