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/****************************************************************
*
* sn310m-touch.c : I2C Touchscreen driver (platform data struct)
*
* Copyright (c) 2013 SEMISENS Co.,Ltd
* http://www.semisens.com
*
****************************************************************/
#include <linux/device.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/hrtimer.h>
#include <asm/unaligned.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <mach/wmt_iomux.h>
//----------------------------------------------
#include "sn310m-touch-pdata.h"
#include "sn310m-touch.h"
#include "touch.h"
//----------------------------------------------
unsigned char sn310m_id_tracking(struct touch *ts, unsigned char find_id);
//----------------------------------------------
// Touch i2c control function
//----------------------------------------------
int sn310m_i2c_read(struct i2c_client *client, unsigned char *cmd, unsigned int cmd_len, unsigned char *data, unsigned int len)
{
struct i2c_msg msg[2];
int ret = 0;
unsigned char i = 0;
unsigned char cmd_tmp[10] = {0, };
if((len == 0) || (data == NULL)) {
dev_err(&client->dev, "I2C read error: Null pointer or length == 0\n");
return -1;
}
memset(cmd_tmp, 0x00, sizeof(cmd_tmp));
if(cmd_len) {
for(i = 0; i < cmd_len; i++) {
cmd_tmp[i] = cmd[cmd_len -1 -i];
}
}
memset(msg, 0x00, sizeof(msg));
msg[0].addr = client->addr;
msg[0].flags = client->flags & I2C_M_TEN;
msg[0].len = cmd_len;
msg[0].buf = cmd_tmp;
msg[1].addr = client->addr;
msg[1].flags = client->flags & I2C_M_TEN;
msg[1].flags |= I2C_M_RD;
msg[1].len = len;
msg[1].buf = data;
if((ret = i2c_transfer(client->adapter, msg, 2)) != 2) {
dev_err(&client->dev, "I2C read error: (%d) reg: 0x%X len: %d\n", ret, cmd_tmp[0], len);
return -EIO;
}
return len;
}
int sn310m_i2c_write(struct i2c_client *client, unsigned char *cmd, unsigned int cmd_len, unsigned char *data, unsigned int len)
{
int ret = 0;
unsigned char block_data[10] = {0, };
unsigned char i = 0;
unsigned char cmd_tmp[10] = {0, };
if((cmd_len + len) >= sizeof(block_data)) {
dev_err(&client->dev, "I2C write error: wdata overflow reg: 0x%X len: %d\n", cmd[0], cmd_len + len);
return -1;
}
memset(block_data, 0x00, sizeof(block_data));
memset(cmd_tmp, 0x00, sizeof(cmd_tmp));
if(cmd_len) {
for(i = 0; i < cmd_len; i++) {
cmd_tmp[i] = cmd[cmd_len -1 -i];
}
}
if(cmd_len)
memcpy(&block_data[0], &cmd_tmp[0], cmd_len);
if(len)
memcpy(&block_data[cmd_len], &data[0], len);
if((ret = i2c_master_send(client, block_data, (cmd_len + len))) < 0) {
dev_err(&client->dev, "I2C write error: (%d) reg: 0x%X len: %d\n", ret, cmd[0], len);
return ret;
}
return len;
}
//----------------------------------------------
// Touch initialize & finalize function
//----------------------------------------------
int sn310m_input_open(struct input_dev *input)
{
struct touch *ts = input_get_drvdata(input);
dbg("%s\n", __func__);
ts->pdata->enable(ts);
return 0;
}
void sn310m_enable(struct touch *ts)
{
unsigned short cmd = REG_TS_STATUS;
unsigned int rdata = 0;
dbg("sn310m_enable++\n");
if(ts->disabled) {
while(!gpio_get_value(ts->pdata->irq_gpio))
ts->pdata->i2c_read(ts->client, (unsigned char *)&cmd, sizeof(cmd), (unsigned char *)&rdata, sizeof(rdata));
wmt_gpio_set_irq_type(ts->pdata->irq_gpio, IRQ_TYPE_EDGE_FALLING);
wmt_gpio_unmask_irq(ts->pdata->irq_gpio);
dbg("enable_irq (%d)\n",ts->irq);
ts->disabled = false;
}
dbg("sn310m_enable--\n");
}
void sn310m_disable(struct touch *ts)
{
dbg("sn310m_disable++\n");
if(!ts->disabled) {
//disable_irq(ts->irq);//wmt_gpio_mask_irq(ts->pdata->irq_gpio);//
wmt_gpio_mask_irq(ts->pdata->irq_gpio);
dbg("disable_irq(ts->irq);\n");
ts->disabled = true;
if(ts->pdata->event_clear){
ts->pdata->event_clear(ts);
}
}
dbg("sn310m_disable--");
}
int sn310m_early_probe(struct touch *ts)
{
// nothing to do...
return 0;
}
int sn310m_probe(struct touch *ts)
{
unsigned short cmd = REG_FIRMWARE_VERSION;
unsigned short rdata = 0;
if(ts->pdata->i2c_read(ts->client, (unsigned char *)&cmd, sizeof(cmd), (unsigned char *)&rdata, sizeof(rdata)) < 0) {
errlog("fail to get touch ic firmware version.\n");
return -1;
}
ts->fw_version = rdata;
dbg("touch ic firmware version : %d \n", rdata);
return 0;
}
//----------------------------------------------
// calibration function
//----------------------------------------------
int sn310m_calibration(struct touch *ts)
{
// nothing to do...
return 0;
}
#define SN310M_NATIVE_INTERFACE
#if defined(SN310M_NATIVE_INTERFACE)
#include <linux/syscalls.h>
extern int g_MiscInitialize;
#endif
//----------------------------------------------
// Touch data processing function
//----------------------------------------------
void sn310m_work(struct touch *ts)
{
unsigned char find_slot = 0;
unsigned short cmd = 0;
status_reg_u status;
data_reg_t data;
button_u button;
unsigned int ids = 0;
int i = 0;
mutex_lock(&ts->mutex);
cmd = REG_TS_STATUS;
ts->pdata->i2c_read(ts->client, (unsigned char *)&cmd, sizeof(cmd), (unsigned char *)&status.uint, sizeof(status_reg_u));
if(status.bits.ts_cnt <= ts->pdata->max_fingers) {
unsigned char cnt = 0;
if(ts->pdata->keycode && (status.bits.ts_cnt == 0)) {
button.bits.bt0_press = (status.bits.button & 0x01) ? 1 : 0;
button.bits.bt1_press = (status.bits.button & 0x02) ? 1 : 0;
button.bits.bt2_press = (status.bits.button & 0x04) ? 1 : 0;
button.bits.bt3_press = (status.bits.button & 0x08) ? 1 : 0;
ts->pdata->key_report(ts, button.ubyte);
}
for(cnt = 0; cnt < status.bits.ts_cnt; cnt++) {
unsigned int id;
unsigned int x;
unsigned int y;
unsigned int area;
unsigned int pressure;
cmd = REG_TS_DATA(cnt);
ts->pdata->i2c_read(ts->client, (unsigned char *)&cmd, sizeof(cmd), (unsigned char *)&data.packet0, sizeof(data_reg_t));
id = data.packet0 >> 12;
x = data.packet0 & 0xfff;
y = data.packet1 & 0xfff;
area = data.packet2 & 0xfff;
pressure = ((data.packet1 >> 8) & 0x00f0) + (data.packet2 >> 12);
dbg("DEBUG(%s) : cmd=%d, id=%d, x=%d, y=%d, area=%d, pressure=%d \n", __func__, cmd, id, x, y, area, pressure);
dbg("DEBUG(%s) : pkt0=%x pkt1=%x pkt2=%x \n", __func__, data.packet0, data.packet1, data.packet2);
if((x >= ts->pdata->abs_max_x) || (y >= ts->pdata->abs_max_y)) {
if(ts->pdata->event_clear)
ts->pdata->event_clear(ts);
dbg("ERROR(%s) : x(%d) or y(%d) value overflow!\n", __func__, x, y);
continue;
}
if(ts->pdata->id_max) {
if((id >= ts->pdata->id_max) || (id < ts->pdata->id_min)) {
if(ts->pdata->event_clear)
ts->pdata->event_clear(ts);
dbg("ERROR(%s) : id(%d) value overflow!\n", __func__, id);
continue;
}
if((find_slot = sn310m_id_tracking(ts, id)) == 0xFF) {
dbg("ERROR(%s) : Empty slot not found\n", __func__);
continue;
}
}
else {
if(id == 0)
continue;
find_slot = cnt;
}
if(ts->finger[find_slot].event == TS_EVENT_UNKNOWN)
ts->finger[find_slot].event = TS_EVENT_PRESS;
else if((ts->finger[find_slot].event == TS_EVENT_PRESS) || (ts->finger[find_slot].event == TS_EVENT_MOVE))
ts->finger[find_slot].event = TS_EVENT_MOVE;
if (ts->pdata->lcd_exchg) {
int tmp;
tmp = x;
x = y;
y = ts->pdata->abs_max_x - tmp;
}
ts->finger[find_slot].status = true;
ts->finger[find_slot].id = id;
ts->finger[find_slot].x = x;
ts->finger[find_slot].y = y;
ts->finger[find_slot].area = (ts->pdata->area_max < area) ? ts->pdata->area_max : area;
ts->finger[find_slot].pressure = (ts->pdata->press_max < pressure) ? ts->pdata->press_max : pressure;
ids |= 1 << find_slot;
}
}
for(i = 0; i < ts->pdata->max_fingers; i++) {
if(!(ids & (1 << i))) {
if(ts->finger[i].event != TS_EVENT_UNKNOWN) {
ts->finger[i].status = true;
ts->finger[i].event = TS_EVENT_RELEASE;
}
}
}
ts->pdata->report(ts);
mutex_unlock(&ts->mutex);
wmt_gpio_unmask_irq(ts->pdata->irq_gpio);
}
unsigned char sn310m_id_tracking(struct touch *ts, unsigned char find_id)
{
unsigned char find_slot = 0xFF;
int i = 0;
for(i = 0; i < ts->pdata->max_fingers; i++) {
if(ts->finger[i].id == find_id)
find_slot = i;
if((ts->finger[i].event == TS_EVENT_UNKNOWN) && (find_slot == 0xFF))
find_slot = i;
}
return find_slot;
}
//----------------------------------------------
// Firmware update Control function
//----------------------------------------------
int sn310m_flash_firmware(struct device *dev, const char *fw_name)
{
// nothing to do...
return 0;
}
|
