static irqreturn_t adc_irq(int irq, void *dev_id)
{
static int cnt = 0;
static int x[4], y[4];
int adcdat0, adcdat1;
/* 优化措施2: 如果ADC完成时, 发现触摸笔已经松开, 则丢弃此次结果 */
adcdat0 = s3c_ts_regs->adcdat0;
adcdat1 = s3c_ts_regs->adcdat1;
if (s3c_ts_regs->adcdat0 & (1<<15))
{
/* 已经松开 */
cnt = 0;
input_report_abs(s3c_ts_dev, ABS_PRESSURE, 0);
input_report_key(s3c_ts_dev, BTN_TOUCH, 0);
input_sync();
enter_wait_pen_down_mode();
}
else
{
// printk("adc_irq cnt = %d, x = %d, y = %d\n", ++cnt, adcdat0 & 0x3ff, adcdat1 & 0x3ff);
/* 优化措施3: 多次测量求平均值 */
x[cnt] = adcdat0 & 0x3ff;
y[cnt] = adcdat1 & 0x3ff;
++cnt;
if (cnt == 4)
{
/* 优化措施4: 软件过滤 */
if (s3c_filter_ts(x, y))
{
//printk("x = %d, y = %d\n", (x[0]+x[1]+x[2]+x[3])/4, (y[0]+y[1]+y[2]+y[3])/4);
input_report_abs(s3c_ts_dev, ABS_X, (x[0]+x[1]+x[2]+x[3])/4);
input_report_abs(s3c_ts_dev, ABS_Y, (y[0]+y[1]+y[2]+y[3])/4);
input_report_abs(s3c_ts_dev, ABS_PRESSURE, 1);
input_report_key(s3c_ts_dev, BTN_TOUCH, 1);
input_sync();
}
cnt = 0;
enter_wait_pen_up_mode();
/* 启动定时器处理长按/滑动的情况 */
mod_timer(&ts_timer, jiffies + HZ/100);
}
else
{
enter_measure_xy_mode();
start_adc();
}
}
return IRQ_HANDLED;
}
static irqreturn_t stylus_action(int irq, void *dev_id)
{
static int cnt = 0;
long int adcdat0, adcdat1;
static long int x[4], y[4];
/*
* Extra: Optimization 2
* After the ADC interrupt is finished, if the stylus is up, then discards this results
*/
adcdat0 = s3c_ts_regs->ADCDAT0;
adcdat1 = s3c_ts_regs->ADCDAT1;
if(s3c_ts_regs->ADCDAT0 & (1<<15)) {
/* Stylus is already up */
cnt = 0;
wait4IntMode_Down();
}else {
//printk("stylus_action cnt = %d, (x,y) = (%ld,%ld)\n", ++cnt, adcdat0 & 0x3FF, adcdat1 & 0x3FF);
/*
* Extra: Optimization 3
* Measure many times and calculate the average value
*/
x[cnt] = adcdat0 & 0x3FF;
y[cnt] = adcdat1 & 0x3FF;
++cnt;
if(4 == cnt) {
/*
* Extra: Optimization 4
* Software filter
*/
if(s3c_filter_ts(x, y)) {
printk("(x,y) = (%ld,%ld)\n", AVG_TS(x[0],x[1],x[2],x[3]), AVG_TS(y[0],y[1],y[2],y[3]));
}
cnt = 0;
wait4IntMode_Up();
/* Start timer for handling the slither */
mod_timer(&ts_timer, jiffies + HZ/100); /* HZ/100 = 10ms since HZ = 1s */
}else {
measure_xy_mode();
start_adc();
}
}
static irqreturn_t adc_irq(int irq, void *dev_id)
{
static int cnt = 0;
int adcdat0, adcdat1;
static int x[4], y[4];
int updown;
enter_no_operation_mode();
#if 1
/* 优化措施2: 如果ADC完成时, 发现触摸笔已经松开, 则丢弃此次结果 */
adcdat0 = s3c_ts_regs->adcdat0;
adcdat1 = s3c_ts_regs->adcdat1;
/* dat0和dat1中bit15都是0， updown才是0, 0是down state */
updown =! (!(adcdat0 & (1<<15))) && (!(adcdat1 & (1<<15)));
if (updown) /* 已经松开 */
{
cnt = 0;
enter_wait_pen_down_mode(); /* 进入等待按下模式 */
}
else /* 已经按下 */
{
// printk("adc_irq cnt = %d, x = %d, y = %d\n", ++cnt, adcdat0 & 0xfff, adcdat1 & 0xfff);
// enter_wait_pen_up_mode();
/* 优化措施3: 多次测量求平均值 */
x[cnt] = adcdat0 & 0xfff;
y[cnt] = adcdat1 & 0xfff;
++cnt;
if (cnt == 4)
{
cnt = 0;
/* 优化措施4: 软件过滤 */
if (s3c_filter_ts(x, y))
{
printk("x = %d, y = %d\n", (x[0]+x[1]+x[2]+x[3])/4, (y[0]+y[1]+y[2]+y[3])/4);
}
enter_wait_pen_up_mode(); /* 进入等待弹起模式 */
/* 启动定时器处理长按/滑动的情况 */
mod_timer(&ts_timer, jiffies + HZ/100);
}
else
{
enter_measure_xy_mode();
start_adc();
}
}
#endif
#if 0
printk("adc_irq cnt = %d, x = %d, y = %d\n", ++cnt,(int) (s3c_ts_regs->adcdat0 & 0xfff), (int) (s3c_ts_regs->adcdat1 & 0xfff));
enter_wait_pen_up_mode();
#endif
return IRQ_HANDLED;
}
