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Input: wdt87xx_i2c - add a scaling factor for TOUCH_MAJOR event 

Get the scaling factor when it reads the sys params. The width value will
multiple the factor and report the value in the TOUCH_MAJOR event.

Signed-off-by: HungNien Chen <hn.chen@weidahitech.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
HungNien Chen 2015-07-01 10:06:49 -07:00 committed by Dmitry Torokhov
parent 57ff96e0f0
commit d55d0b56b9
1 changed files with 14 additions and 5 deletions
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19
drivers/input/touchscreen/wdt87xx_i2c.c
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@ -23,7 +23,7 @@
#include <asm/unaligned.h>
#define WDT87XX_NAME "wdt87xx_i2c"
#define WDT87XX_DRV_VER "0.9.5"
#define WDT87XX_DRV_VER "0.9.6"
#define WDT87XX_FW_NAME "wdt87xx_fw.bin"
#define WDT87XX_CFG_NAME "wdt87xx_cfg.bin"
@ -83,6 +83,7 @@
#define CTL_PARAM_OFFSET_PHY_Y1 18
#define CTL_PARAM_OFFSET_PHY_W 22
#define CTL_PARAM_OFFSET_PHY_H 24
#define CTL_PARAM_OFFSET_FACTOR 32
/* Communication commands */
#define PACKET_SIZE 56
@ -161,6 +162,7 @@ struct wdt87xx_sys_param {
u16 phy_ch_y;
u16 phy_w;
u16 phy_h;
u16 scaling_factor;
u32 max_x;
u32 max_y;
};
@ -401,7 +403,7 @@ static int wdt87xx_get_sysparam(struct i2c_client *client,
u8 buf[PKT_READ_SIZE];
int error;
error = wdt87xx_get_string(client, STRIDX_PARAMETERS, buf, 32);
error = wdt87xx_get_string(client, STRIDX_PARAMETERS, buf, 34);
if (error) {
dev_err(&client->dev, "failed to get parameters\n");
return error;
@ -414,6 +416,10 @@ static int wdt87xx_get_sysparam(struct i2c_client *client,
param->phy_w = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_W) / 10;
param->phy_h = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_H) / 10;
/* Get the scaling factor of pixel to logical coordinate */
param->scaling_factor =
get_unaligned_le16(buf + CTL_PARAM_OFFSET_FACTOR);
param->max_x = MAX_UNIT_AXIS;
param->max_y = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS * param->phy_h,
param->phy_w);
@ -905,8 +911,8 @@ static void wdt87xx_report_contact(struct input_dev *input,
u8 *buf)
{
int finger_id;
u32 x, y;
u8 w, p;
u32 x, y, w;
u8 p;
finger_id = (buf[FINGER_EV_V1_OFFSET_ID] >> 3) - 1;
if (finger_id < 0)
@ -917,6 +923,8 @@ static void wdt87xx_report_contact(struct input_dev *input,
return;
w = buf[FINGER_EV_V1_OFFSET_W];
w *= param->scaling_factor;
p = buf[FINGER_EV_V1_OFFSET_P];
x = get_unaligned_le16(buf + FINGER_EV_V1_OFFSET_X);
@ -995,7 +1003,8 @@ static int wdt87xx_ts_create_input_device(struct wdt87xx_data *wdt)
input_abs_set_res(input, ABS_MT_POSITION_X, res);
input_abs_set_res(input, ABS_MT_POSITION_Y, res);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0xFF, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
0, wdt->param.max_x, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xFF, 0, 0);
input_mt_init_slots(input, WDT_MAX_FINGER,