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Input: pixcir_i2c_ts - use Type-B Multi-Touch protocol 

Switch to using the Type-B Multi-Touch protocol.

Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Roger Quadros 2014-07-28 09:58:54 -07:00 committed by Dmitry Torokhov
parent 3808843cf1
commit 62e65b7e85
1 changed files with 90 additions and 27 deletions
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117
drivers/input/touchscreen/pixcir_i2c_ts.c
View File

@ -23,9 +23,12 @@
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/pixcir_ts.h>
#include <linux/gpio.h>
#define PIXCIR_MAX_SLOTS 2
struct pixcir_i2c_ts_data {
struct i2c_client *client;
struct input_dev *input;
@ -33,12 +36,25 @@ struct pixcir_i2c_ts_data {
bool running;
};
static void pixcir_ts_poscheck(struct pixcir_i2c_ts_data *data)
struct pixcir_touch {
int x;
int y;
};
struct pixcir_report_data {
int num_touches;
struct pixcir_touch touches[PIXCIR_MAX_SLOTS];
};
static void pixcir_ts_parse(struct pixcir_i2c_ts_data *tsdata,
struct pixcir_report_data *report)
{
struct pixcir_i2c_ts_data *tsdata = data;
u8 rdbuf[10], wrbuf[1] = { 0 };
u8 *bufptr;
u8 touch;
int ret;
int ret, i;
memset(report, 0, sizeof(struct pixcir_report_data));
ret = i2c_master_send(tsdata->client, wrbuf, sizeof(wrbuf));
if (ret != sizeof(wrbuf)) {
@ -56,45 +72,85 @@ static void pixcir_ts_poscheck(struct pixcir_i2c_ts_data *data)
return;
}
touch = rdbuf[0];
if (touch) {
u16 posx1 = (rdbuf[3] << 8) | rdbuf[2];
u16 posy1 = (rdbuf[5] << 8) | rdbuf[4];
u16 posx2 = (rdbuf[7] << 8) | rdbuf[6];
u16 posy2 = (rdbuf[9] << 8) | rdbuf[8];
touch = rdbuf[0] & 0x7;
if (touch > PIXCIR_MAX_SLOTS)
touch = PIXCIR_MAX_SLOTS;
input_report_key(tsdata->input, BTN_TOUCH, 1);
input_report_abs(tsdata->input, ABS_X, posx1);
input_report_abs(tsdata->input, ABS_Y, posy1);
report->num_touches = touch;
bufptr = &rdbuf[2];
input_report_abs(tsdata->input, ABS_MT_POSITION_X, posx1);
input_report_abs(tsdata->input, ABS_MT_POSITION_Y, posy1);
input_mt_sync(tsdata->input);
for (i = 0; i < touch; i++) {
report->touches[i].x = (bufptr[1] << 8) | bufptr[0];
report->touches[i].y = (bufptr[3] << 8) | bufptr[2];
if (touch == 2) {
input_report_abs(tsdata->input,
ABS_MT_POSITION_X, posx2);
input_report_abs(tsdata->input,
ABS_MT_POSITION_Y, posy2);
input_mt_sync(tsdata->input);
}
} else {
input_report_key(tsdata->input, BTN_TOUCH, 0);
bufptr = bufptr + 4;
}
}
static void pixcir_ts_report(struct pixcir_i2c_ts_data *ts,
struct pixcir_report_data *report)
{
struct input_mt_pos pos[PIXCIR_MAX_SLOTS];
int slots[PIXCIR_MAX_SLOTS];
struct pixcir_touch *touch;
int n, i, slot;
struct device *dev = &ts->client->dev;
n = report->num_touches;
if (n > PIXCIR_MAX_SLOTS)
n = PIXCIR_MAX_SLOTS;
for (i = 0; i < n; i++) {
touch = &report->touches[i];
pos[i].x = touch->x;
pos[i].y = touch->y;
}
input_sync(tsdata->input);
input_mt_assign_slots(ts->input, slots, pos, n);
for (i = 0; i < n; i++) {
touch = &report->touches[i];
slot = slots[i];
input_mt_slot(ts->input, slot);
input_mt_report_slot_state(ts->input,
MT_TOOL_FINGER, true);
input_event(ts->input, EV_ABS, ABS_MT_POSITION_X, touch->x);
input_event(ts->input, EV_ABS, ABS_MT_POSITION_Y, touch->y);
dev_dbg(dev, "%d: slot %d, x %d, y %d\n",
i, slot, touch->x, touch->y);
}
input_mt_sync_frame(ts->input);
input_sync(ts->input);
}
static irqreturn_t pixcir_ts_isr(int irq, void *dev_id)
{
struct pixcir_i2c_ts_data *tsdata = dev_id;
const struct pixcir_ts_platform_data *pdata = tsdata->chip;
struct pixcir_report_data report;
while (tsdata->running) {
pixcir_ts_poscheck(tsdata);
/* parse packet */
pixcir_ts_parse(tsdata, &report);
if (gpio_get_value(pdata->gpio_attb))
/* report it */
pixcir_ts_report(tsdata, &report);
if (gpio_get_value(pdata->gpio_attb)) {
if (report.num_touches) {
/*
* Last report with no finger up?
* Do it now then.
*/
input_mt_sync_frame(tsdata->input);
input_sync(tsdata->input);
}
break;
}
msleep(20);
}
@ -371,6 +427,13 @@ static int pixcir_i2c_ts_probe(struct i2c_client *client,
input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->x_max, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->y_max, 0, 0);
error = input_mt_init_slots(input, PIXCIR_MAX_SLOTS,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(dev, "Error initializing Multi-Touch slots\n");
return error;
}
input_set_drvdata(input, tsdata);
error = devm_gpio_request_one(dev, pdata->gpio_attb,