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input: touchscreen: add protocol B support for ITE tech driver

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Add multi-touch protocol B support for ITE tech touch
screen driver.

Change-Id: I9ed40ccedab71a3800b97fc7825741855bceaa29
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>
This commit is contained in:
Shantanu Jain 2015-05-17 20:01:20 +05:30
parent a2abe89cff
commit 97f29fe6f3
1 changed files with 47 additions and 59 deletions
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106
drivers/input/touchscreen/it7258_ts_i2c.c
View file

@ -26,6 +26,7 @@
#include <linux/of_gpio.h>
#include <linux/fb.h>
#include <linux/debugfs.h>
#include <linux/input/mt.h>
#define MAX_BUFFER_SIZE 144
#define DEVICE_NAME "IT7260"
@ -98,18 +99,14 @@
#define PD_FLAGS_DATA_TYPE_BITS 0xF0
/* other types (like chip-detected gestures) exist but we do not care */
#define PD_FLAGS_DATA_TYPE_TOUCH 0x00
/* set if pen touched, clear if finger(s) */
#define PD_FLAGS_NOT_PEN 0x08
/* a bit for each finger data that is valid (from lsb to msb) */
#define PD_FLAGS_HAVE_FINGERS 0x07
/* number of finger supported */
#define PD_FINGERS_SUPPORTED 3
#define PD_PALM_FLAG_BIT 0x01
#define FD_PRESSURE_BITS 0x0F
#define FD_PRESSURE_NONE 0x00
#define FD_PRESSURE_HOVER 0x01
#define FD_PRESSURE_LIGHT 0x02
#define FD_PRESSURE_NORMAL 0x04
#define FD_PRESSURE_HIGH 0x08
#define FD_PRESSURE_HEAVY 0x0F
#define IT_VTG_MIN_UV 1800000
#define IT_VTG_MAX_UV 1800000
@ -166,12 +163,6 @@ static int IT7260_ts_suspend(struct device *dev);
static struct IT7260_ts_data *gl_ts;
/* Function declarations */
static int fb_notifier_callback(struct notifier_block *self,
unsigned long event, void *data);
static int IT7260_ts_resume(struct device *dev);
static int IT7260_ts_suspend(struct device *dev);
static int IT7260_debug_suspend_set(void *_data, u64 val)
{
if (val)
@ -706,35 +697,26 @@ EXPORT_SYMBOL(IT7260_sendCalibrationCmd);
static void IT7260_ts_release_all(void)
{
int finger;
for (finger = 0; finger < PD_FINGERS_SUPPORTED; finger++) {
input_mt_slot(gl_ts->input_dev, finger);
input_mt_report_slot_state(gl_ts->input_dev,
MT_TOOL_FINGER, 0);
}
input_report_key(gl_ts->input_dev, BTN_TOUCH, 0);
input_mt_sync(gl_ts->input_dev);
input_sync(gl_ts->input_dev);
}
static void IT7260_readFingerData(uint16_t *xP, uint16_t *yP,
uint8_t *pressureP, const struct FingerData *fd)
{
uint16_t x = fd->xLo;
uint16_t y = fd->yLo;
x += ((uint16_t)(fd->hi & 0x0F)) << 8;
y += ((uint16_t)(fd->hi & 0xF0)) << 4;
if (xP)
*xP = x;
if (yP)
*yP = y;
if (pressureP)
*pressureP = fd->pressure & FD_PRESSURE_BITS;
}
static irqreturn_t IT7260_ts_threaded_handler(int irq, void *devid)
{
struct PointData point_data;
uint8_t dev_status;
struct input_dev *input_dev = gl_ts->input_dev;
u8 dev_status, finger, touch_count = 0, finger_status;
u8 pressure = FD_PRESSURE_NONE;
u16 x, y;
bool palm_detected;
uint8_t pressure = FD_PRESSURE_NONE;
uint16_t x, y;
/*
* This code adds the touch-to-wake functionality to the ITE tech
@ -747,10 +729,10 @@ static irqreturn_t IT7260_ts_threaded_handler(int irq, void *devid)
if (gl_ts->device_needs_wakeup) {
pm_stay_awake(&gl_ts->client->dev);
gl_ts->device_needs_wakeup = false;
input_report_key(gl_ts->input_dev, KEY_WAKEUP, 1);
input_sync(gl_ts->input_dev);
input_report_key(gl_ts->input_dev, KEY_WAKEUP, 0);
input_sync(gl_ts->input_dev);
input_report_key(input_dev, KEY_WAKEUP, 1);
input_sync(input_dev);
input_report_key(input_dev, KEY_WAKEUP, 0);
input_sync(input_dev);
schedule_work(&gl_ts->work_pm_relax);
}
@ -774,38 +756,43 @@ static irqreturn_t IT7260_ts_threaded_handler(int irq, void *devid)
palm_detected = point_data.palm & PD_PALM_FLAG_BIT;
if (palm_detected && gl_ts->pdata->palm_detect_en) {
input_report_key(gl_ts->input_dev,
input_report_key(input_dev,
gl_ts->pdata->palm_detect_keycode, 1);
input_sync(gl_ts->input_dev);
input_report_key(gl_ts->input_dev,
input_sync(input_dev);
input_report_key(input_dev,
gl_ts->pdata->palm_detect_keycode, 0);
input_sync(gl_ts->input_dev);
input_sync(input_dev);
}
if ((point_data.flags & PD_FLAGS_HAVE_FINGERS) & 1)
IT7260_readFingerData(&x, &y, &pressure, point_data.fd);
for (finger = 0; finger < PD_FINGERS_SUPPORTED; finger++) {
finger_status = point_data.flags & (0x01 << finger);
if (pressure >= FD_PRESSURE_LIGHT) {
if (!gl_ts->had_finger_down)
gl_ts->had_finger_down = true;
input_mt_slot(input_dev, finger);
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
finger_status != 0);
IT7260_readFingerData(&x, &y, &pressure, point_data.fd);
x = point_data.fd[finger].xLo +
(((u16)(point_data.fd[finger].hi & 0x0F)) << 8);
y = point_data.fd[finger].yLo +
(((u16)(point_data.fd[finger].hi & 0xF0)) << 4);
input_report_key(gl_ts->input_dev, BTN_TOUCH, 1);
input_report_abs(gl_ts->input_dev, ABS_MT_POSITION_X, x);
input_report_abs(gl_ts->input_dev, ABS_MT_POSITION_Y, y);
input_mt_sync(gl_ts->input_dev);
input_sync(gl_ts->input_dev);
pressure = point_data.fd[finger].pressure & FD_PRESSURE_BITS;
} else if (gl_ts->had_finger_down) {
gl_ts->had_finger_down = false;
input_report_key(gl_ts->input_dev, BTN_TOUCH, 0);
input_mt_sync(gl_ts->input_dev);
input_sync(gl_ts->input_dev);
if (finger_status) {
if (pressure >= FD_PRESSURE_LIGHT) {
input_report_key(input_dev, BTN_TOUCH, 1);
input_report_abs(input_dev,
ABS_MT_POSITION_X, x);
input_report_abs(input_dev,
ABS_MT_POSITION_Y, y);
touch_count++;
}
}
}
input_report_key(input_dev, BTN_TOUCH, touch_count > 0);
input_sync(input_dev);
return IRQ_HANDLED;
}
@ -1015,6 +1002,7 @@ static int IT7260_ts_probe(struct i2c_client *client,
input_set_abs_params(gl_ts->input_dev, ABS_MT_POSITION_Y, 0,
SCREEN_Y_RESOLUTION, 0, 0);
input_set_drvdata(gl_ts->input_dev, gl_ts);
input_mt_init_slots(gl_ts->input_dev, PD_FINGERS_SUPPORTED, 0);
if (pdata->wakeup) {
set_bit(KEY_WAKEUP, gl_ts->input_dev->keybit);