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Merge branch 'for-4.19/elan' into for-linus 

Resolution/pressure fixes and new device support for hid-elan
hifive-unleashed-5.1
Jiri Kosina 2018-08-20 18:06:30 +02:00
parent 415d2b3392 e7ad3dc9f4
commit 5a12d86ce3
2 changed files with 184 additions and 53 deletions
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235
drivers/hid/hid-elan.c
View File

@ -19,38 +19,49 @@
#include "hid-ids.h"
#define ELAN_MT_I2C 0x5d
#define ELAN_SINGLE_FINGER 0x81
#define ELAN_MT_FIRST_FINGER 0x82
#define ELAN_MT_SECOND_FINGER 0x83
#define ELAN_INPUT_REPORT_SIZE 8
#define ELAN_I2C_REPORT_SIZE 32
#define ELAN_FINGER_DATA_LEN 5
#define ELAN_MAX_FINGERS 5
#define ELAN_MAX_PRESSURE 255
#define ELAN_TP_USB_INTF 1
#define ELAN_FEATURE_REPORT 0x0d
#define ELAN_FEATURE_SIZE 5
#define ELAN_PARAM_MAX_X 6
#define ELAN_PARAM_MAX_Y 7
#define ELAN_PARAM_RES 8
#define ELAN_MUTE_LED_REPORT 0xBC
#define ELAN_LED_REPORT_SIZE 8
struct elan_touchpad_settings {
u8 max_fingers;
u16 max_x;
u16 max_y;
u8 max_area_x;
u8 max_area_y;
u8 max_w;
int usb_bInterfaceNumber;
};
#define ELAN_HAS_LED BIT(0)
struct elan_drvdata {
struct input_dev *input;
u8 prev_report[ELAN_INPUT_REPORT_SIZE];
struct led_classdev mute_led;
u8 mute_led_state;
struct elan_touchpad_settings *settings;
u16 max_x;
u16 max_y;
u16 res_x;
u16 res_y;
};
static int is_not_elan_touchpad(struct hid_device *hdev)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
struct elan_drvdata *drvdata = hid_get_drvdata(hdev);
if (hdev->bus == BUS_USB) {
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
return (intf->altsetting->desc.bInterfaceNumber != drvdata->settings->usb_bInterfaceNumber);
return (intf->altsetting->desc.bInterfaceNumber !=
ELAN_TP_USB_INTF);
}
return 0;
}
static int elan_input_mapping(struct hid_device *hdev, struct hid_input *hi,
@ -62,12 +73,86 @@ static int elan_input_mapping(struct hid_device *hdev, struct hid_input *hi,
if (field->report->id == ELAN_SINGLE_FINGER ||
field->report->id == ELAN_MT_FIRST_FINGER ||
field->report->id == ELAN_MT_SECOND_FINGER)
field->report->id == ELAN_MT_SECOND_FINGER ||
field->report->id == ELAN_MT_I2C)
return -1;
return 0;
}
static int elan_get_device_param(struct hid_device *hdev,
unsigned char *dmabuf, unsigned char param)
{
int ret;
dmabuf[0] = ELAN_FEATURE_REPORT;
dmabuf[1] = 0x05;
dmabuf[2] = 0x03;
dmabuf[3] = param;
dmabuf[4] = 0x01;
ret = hid_hw_raw_request(hdev, ELAN_FEATURE_REPORT, dmabuf,
ELAN_FEATURE_SIZE, HID_FEATURE_REPORT,
HID_REQ_SET_REPORT);
if (ret != ELAN_FEATURE_SIZE) {
hid_err(hdev, "Set report error for parm %d: %d\n", param, ret);
return ret;
}
ret = hid_hw_raw_request(hdev, ELAN_FEATURE_REPORT, dmabuf,
ELAN_FEATURE_SIZE, HID_FEATURE_REPORT,
HID_REQ_GET_REPORT);
if (ret != ELAN_FEATURE_SIZE) {
hid_err(hdev, "Get report error for parm %d: %d\n", param, ret);
return ret;
}
return 0;
}
static unsigned int elan_convert_res(char val)
{
/*
* (value from firmware) * 10 + 790 = dpi
* dpi * 10 / 254 = dots/mm
*/
return (val * 10 + 790) * 10 / 254;
}
static int elan_get_device_params(struct hid_device *hdev)
{
struct elan_drvdata *drvdata = hid_get_drvdata(hdev);
unsigned char *dmabuf;
int ret;
dmabuf = kmalloc(ELAN_FEATURE_SIZE, GFP_KERNEL);
if (!dmabuf)
return -ENOMEM;
ret = elan_get_device_param(hdev, dmabuf, ELAN_PARAM_MAX_X);
if (ret)
goto err;
drvdata->max_x = (dmabuf[4] << 8) | dmabuf[3];
ret = elan_get_device_param(hdev, dmabuf, ELAN_PARAM_MAX_Y);
if (ret)
goto err;
drvdata->max_y = (dmabuf[4] << 8) | dmabuf[3];
ret = elan_get_device_param(hdev, dmabuf, ELAN_PARAM_RES);
if (ret)
goto err;
drvdata->res_x = elan_convert_res(dmabuf[3]);
drvdata->res_y = elan_convert_res(dmabuf[4]);
err:
kfree(dmabuf);
return ret;
}
static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
int ret;
@ -77,6 +162,10 @@ static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi)
if (is_not_elan_touchpad(hdev))
return 0;
ret = elan_get_device_params(hdev);
if (ret)
return ret;
input = devm_input_allocate_device(&hdev->dev);
if (!input)
return -ENOMEM;
@ -90,25 +179,25 @@ static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi)
input->id.version = hdev->version;
input->dev.parent = &hdev->dev;
input_set_abs_params(input, ABS_MT_POSITION_X, 0,
drvdata->settings->max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
drvdata->settings->max_y, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
drvdata->settings->max_fingers, 0, 0);
input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
drvdata->settings->max_w, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_X, 0, drvdata->max_x,
0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, drvdata->max_y,
0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE, 0, ELAN_MAX_PRESSURE,
0, 0);
__set_bit(BTN_LEFT, input->keybit);
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
ret = input_mt_init_slots(input, drvdata->settings->max_fingers,
INPUT_MT_POINTER);
ret = input_mt_init_slots(input, ELAN_MAX_FINGERS, INPUT_MT_POINTER);
if (ret) {
hid_err(hdev, "Failed to init elan MT slots: %d\n", ret);
return ret;
}
input_abs_set_res(input, ABS_X, drvdata->res_x);
input_abs_set_res(input, ABS_Y, drvdata->res_y);
ret = input_register_device(input);
if (ret) {
hid_err(hdev, "Failed to register elan input device: %d\n",
@ -126,7 +215,7 @@ static void elan_report_mt_slot(struct elan_drvdata *drvdata, u8 *data,
unsigned int slot_num)
{
struct input_dev *input = drvdata->input;
int x, y, w;
int x, y, p;
bool active = !!data;
@ -134,17 +223,17 @@ static void elan_report_mt_slot(struct elan_drvdata *drvdata, u8 *data,
input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
if (active) {
x = ((data[0] & 0xF0) << 4) | data[1];
y = drvdata->settings->max_y -
y = drvdata->max_y -
(((data[0] & 0x07) << 8) | data[2]);
w = data[4];
p = data[4];
input_report_abs(input, ABS_MT_POSITION_X, x);
input_report_abs(input, ABS_MT_POSITION_Y, y);
input_report_abs(input, ABS_TOOL_WIDTH, w);
input_report_abs(input, ABS_MT_PRESSURE, p);
}
}
static void elan_report_input(struct elan_drvdata *drvdata, u8 *data)
static void elan_usb_report_input(struct elan_drvdata *drvdata, u8 *data)
{
int i;
struct input_dev *input = drvdata->input;
@ -162,7 +251,7 @@ static void elan_report_input(struct elan_drvdata *drvdata, u8 *data)
* byte 5: x8 x7 x6 x5 x4 x3 x2 x1
* byte 6: y8 y7 y6 y5 y4 y3 y2 y1
* byte 7: sy4 sy3 sy2 sy1 sx4 sx3 sx2 sx1
* byte 8: w8 w7 w6 w5 w4 w3 w2 w1
* byte 8: p8 p7 p6 p5 p4 p3 p2 p1
*
* packet structure for ELAN_MT_SECOND_FINGER:
*
@ -171,19 +260,21 @@ static void elan_report_input(struct elan_drvdata *drvdata, u8 *data)
* byte 3: x8 x7 x6 x5 x4 x3 x2 x1
* byte 4: y8 y7 y6 y5 y4 y3 y2 y1
* byte 5: sy4 sy3 sy2 sy1 sx4 sx3 sx2 sx1
* byte 6: w8 w7 w6 w5 w4 w3 w2 w1
* byte 6: p8 p7 p6 p5 p4 p3 p2 p1
* byte 7: 0 0 0 0 0 0 0 0
* byte 8: 0 0 0 0 0 0 0 0
*
* f5-f1: finger touch bits
* L: clickpad button
* sy / sx: not sure yet, but this looks like rectangular
* area for finger
* w: looks like finger width
* sy / sx: finger width / height expressed in traces, the total number
* of traces can be queried by doing a HID_REQ_SET_REPORT
* { 0x0d, 0x05, 0x03, 0x05, 0x01 } followed by a GET, in the
* returned buf, buf[3]=no-x-traces, buf[4]=no-y-traces.
* p: pressure
*/
if (data[0] == ELAN_SINGLE_FINGER) {
for (i = 0; i < drvdata->settings->max_fingers; i++) {
for (i = 0; i < ELAN_MAX_FINGERS; i++) {
if (data[2] & BIT(i + 3))
elan_report_mt_slot(drvdata, data + 3, i);
else
@ -210,7 +301,7 @@ static void elan_report_input(struct elan_drvdata *drvdata, u8 *data)
if (prev_report[0] != ELAN_MT_FIRST_FINGER)
return;
for (i = 0; i < drvdata->settings->max_fingers; i++) {
for (i = 0; i < ELAN_MAX_FINGERS; i++) {
if (prev_report[2] & BIT(i + 3)) {
if (!first) {
first = 1;
@ -229,6 +320,46 @@ static void elan_report_input(struct elan_drvdata *drvdata, u8 *data)
input_sync(input);
}
static void elan_i2c_report_input(struct elan_drvdata *drvdata, u8 *data)
{
struct input_dev *input = drvdata->input;
u8 *finger_data;
int i;
/*
* Elan MT touchpads in i2c mode send finger data in the same format
* as in USB mode, but then with all fingers in a single packet.
*
* packet structure for ELAN_MT_I2C:
*
* byte 1: 1 0 0 1 1 1 0 1 // 0x5d
* byte 2: f5 f4 f3 f2 f1 0 0 L
* byte 3: x12 x11 x10 x9 0? y11 y10 y9
* byte 4: x8 x7 x6 x5 x4 x3 x2 x1
* byte 5: y8 y7 y6 y5 y4 y3 y2 y1
* byte 6: sy4 sy3 sy2 sy1 sx4 sx3 sx2 sx1
* byte 7: p8 p7 p6 p5 p4 p3 p2 p1
* byte 8-12: Same as byte 3-7 for second finger down
* byte 13-17: Same as byte 3-7 for third finger down
* byte 18-22: Same as byte 3-7 for fourth finger down
* byte 23-27: Same as byte 3-7 for fifth finger down
*/
finger_data = data + 2;
for (i = 0; i < ELAN_MAX_FINGERS; i++) {
if (data[1] & BIT(i + 3)) {
elan_report_mt_slot(drvdata, finger_data, i);
finger_data += ELAN_FINGER_DATA_LEN;
} else {
elan_report_mt_slot(drvdata, NULL, i);
}
}
input_report_key(input, BTN_LEFT, data[1] & 0x01);
input_mt_sync_frame(input);
input_sync(input);
}
static int elan_raw_event(struct hid_device *hdev,
struct hid_report *report, u8 *data, int size)
{
@ -241,11 +372,16 @@ static int elan_raw_event(struct hid_device *hdev,
data[0] == ELAN_MT_FIRST_FINGER ||
data[0] == ELAN_MT_SECOND_FINGER) {
if (size == ELAN_INPUT_REPORT_SIZE) {
elan_report_input(drvdata, data);
elan_usb_report_input(drvdata, data);
return 1;
}
}
if (data[0] == ELAN_MT_I2C && size == ELAN_I2C_REPORT_SIZE) {
elan_i2c_report_input(drvdata, data);
return 1;
}
return 0;
}
@ -343,7 +479,6 @@ static int elan_probe(struct hid_device *hdev, const struct hid_device_id *id)
if (!drvdata)
return -ENOMEM;
drvdata->settings = (struct elan_touchpad_settings *)id->driver_data;
hid_set_drvdata(hdev, drvdata);
ret = hid_parse(hdev);
@ -371,9 +506,11 @@ static int elan_probe(struct hid_device *hdev, const struct hid_device_id *id)
if (ret)
goto err;
ret = elan_init_mute_led(hdev);
if (ret)
goto err;
if (id->driver_data & ELAN_HAS_LED) {
ret = elan_init_mute_led(hdev);
if (ret)
goto err;
}
return 0;
err:
@ -386,22 +523,14 @@ static void elan_remove(struct hid_device *hdev)
hid_hw_stop(hdev);
}
static const struct elan_touchpad_settings hp_x2_10_touchpad_data = {
.max_fingers = 5,
.max_x = 2930,
.max_y = 1250,
.max_area_x = 15,
.max_area_y = 15,
.max_w = 255,
.usb_bInterfaceNumber = 1,
};
static const struct hid_device_id elan_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_HP_X2),
.driver_data = ELAN_HAS_LED },
{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_HP_X2_10_COVER),
(kernel_ulong_t)&hp_x2_10_touchpad_data},
.driver_data = ELAN_HAS_LED },
{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_TOSHIBA_CLICK_L9W) },
{ }
};
MODULE_DEVICE_TABLE(hid, elan_devices);
static struct hid_driver elan_driver = {

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

@ -369,6 +369,8 @@
#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001 0xa001
#define USB_VENDOR_ID_ELAN 0x04f3
#define USB_DEVICE_ID_TOSHIBA_CLICK_L9W 0x0401
#define USB_DEVICE_ID_HP_X2 0x074d
#define USB_DEVICE_ID_HP_X2_10_COVER 0x0755
#define USB_VENDOR_ID_ELECOM 0x056e