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path: root/drivers/hid/hid-elan.c
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Diffstat (limited to 'drivers/hid/hid-elan.c')
-rw-r--r--drivers/hid/hid-elan.c235
1 files changed, 182 insertions, 53 deletions
diff --git a/drivers/hid/hid-elan.c b/drivers/hid/hid-elan.c
index 803a725785cf..07e26c3567eb 100644
--- a/drivers/hid/hid-elan.c
+++ b/drivers/hid/hid-elan.c
@@ -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 !=
+ ELAN_TP_USB_INTF);
+ }
- return (intf->altsetting->desc.bInterfaceNumber != drvdata->settings->usb_bInterfaceNumber);
+ 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 = {