/*
* 测试触摸屏，打印触点坐标
*/
void Test_Ts(void)
{
isr_handle_array[ISR_ADC_OFT] = AdcTsIntHandle; // 设置ADC中断服务程序
INTMSK &= ~BIT_ADC; // 开启ADC总中断
INTSUBMSK &= ~(BIT_SUB_TC); // 开启INT_TC中断，即触摸屏被按下或松开时产生中断
INTSUBMSK &= ~(BIT_SUB_ADC); // 开启INT_ADC中断，即A/D转换结束时产生中断
// 使能预分频功能，设置A/D转换器的时钟 = PCLK/(49+1)
ADCCON = PRESCALE_EN | PRSCVL(49);
/* 采样延时时间 = (1/3.6864M)*50000 = 13.56ms
* 即按下触摸屏后，再过13.56ms才采样
*/
ADCDLY = 50000;
wait_down_int(); /* 进入"等待中断模式"，等待触摸屏被按下 */
printf("Touch the screem to test, press any key to exit\n\r");
getc();
// 屏蔽ADC中断
INTSUBMSK |= BIT_SUB_TC;
INTSUBMSK |= BIT_SUB_ADC;
INTMSK |= BIT_ADC;
}
/*
* INT_TC的中断服务程序
* 当触摸屏被按下时，进入自动(连续) X/Y轴坐标转换模式；
* 当触摸屏被松开时，进入等待中断模式，再次等待INT_TC中断
*/
static void Isr_Tc(void)
{
if (ADCDAT0 & 0x8000)
{
printf("Stylus Up!!\n\r");
wait_down_int(); /* 进入"等待中断模式"，等待触摸屏被按下 */
}
else
{
printf("Stylus Down: ");
mode_auto_xy(); /* 进入自动(连续) X/Y轴坐标转换模式 */
/* 设置位[0]为1，启动A/D转换
* 注意：ADCDLY为50000，PCLK = 50MHz，
* 要经过(1/50MHz)*50000=1ms之后才开始转换X坐标
* 再经过1ms之后才开始转换Y坐标
*/
ADCCON |= ADC_START;
}
// 清INT_TC中断
SUBSRCPND |= BIT_SUB_TC;
SRCPND |= BIT_ADC;
INTPND |= BIT_ADC;
}
static int s3c2410_ts_pm_callback(struct pm_dev *pm_dev, pm_request_t req,
void *data)
{
switch (req) {
case PM_SUSPEND:
tsEvent = tsEvent_dummy;
break;
case PM_RESUME:
tsEvent = tsEvent_raw;
wait_down_int();
break;
}
return 0;
}
static void s3c2410_isr_tc(int irq, void *dev_id, struct pt_regs *reg)
{
#if 0
DPRINTK("Occured Touch Screen Interrupt\n");
DPRINTK("SUBSRCPND = 0x%08lx\n", SUBSRCPND);
#endif
spin_lock_irq(&(tsdev.lock));
if (tsdev.penStatus == PEN_UP) {
start_ts_adc();
} else {
tsdev.penStatus = PEN_UP;
DPRINTK("PEN UP: x: %08d, y: %08d\n", x, y);
wait_down_int();
tsEvent();
}
spin_unlock_irq(&(tsdev.lock));
}
/*
* INT_ADC的中断服务程序
* A/D转换结束时发生此中断
* 先读取X、Y坐标值，再进入等待中断模式
*/
static void Isr_Adc(void)
{
// 打印X、Y坐标值
printf("xdata = %4d, ydata = %4d\r\n", (int)(ADCDAT0 & 0x3ff), (int)(ADCDAT1 & 0x3ff));
/* 判断是S3C2410还是S3C2440 */
if ((GSTATUS1 == 0x32410000) || (GSTATUS1 == 0x32410002))
{ // S3C2410
wait_down_int(); /* 进入"等待中断模式"，等待触摸屏被松开 */
}
else
{ // S3C2440
wait_up_int(); /* 进入"等待中断模式"，等待触摸屏被松开 */
}
// 清INT_ADC中断
SUBSRCPND |= BIT_SUB_ADC;
SRCPND |= BIT_ADC;
INTPND |= BIT_ADC;
}
static int __init s3c2410_ts_init(void)
{
int ret;
tsEvent = tsEvent_dummy;
ret = register_chrdev(0, DEVICE_NAME, &s3c2410_fops);
if (ret < 0) {
printk(DEVICE_NAME " can't get major number\n");
return ret;
}
tsMajor = ret;
/* set gpio to XP, YM, YP and YM */
#if 0
set_GPIO_mode(GPIO106_nYPON_MD);
set_GPIO_mode(GPIO105_YMON_MD);
set_GPIO_mode(GPIO104_nXPON_MD);
set_GPIO_mode(GPIO103_XMON_MD);
GPUP(GPIO106_nYPON) |= GPIO_bit(GPIO106_nYPON);
GPUP(GPIO105_YMON) &= GPIO_bit(GPIO105_YMON);
GPUP(GPIO104_nXPON) |= GPIO_bit(GPIO104_nXPON);
GPUP(GPIO103_XMON) &= GPIO_bit(GPIO103_XMON);
#else
set_gpio_ctrl(GPIO_YPON);
set_gpio_ctrl(GPIO_YMON);
set_gpio_ctrl(GPIO_XPON);
set_gpio_ctrl(GPIO_XMON);
#endif
/* Enable touch interrupt */
ret = request_irq(IRQ_ADC_DONE, s3c2410_isr_adc, SA_INTERRUPT,
DEVICE_NAME, s3c2410_isr_adc);
if (ret) goto adc_failed;
ret = request_irq(IRQ_TC, s3c2410_isr_tc, SA_INTERRUPT,
DEVICE_NAME, s3c2410_isr_tc);
if (ret) goto tc_failed;
/* Wait for touch screen interrupts */
wait_down_int();
#ifdef CONFIG_DEVFS_FS
devfs_ts_dir = devfs_mk_dir(NULL, "touchscreen", NULL);
devfs_tsraw = devfs_register(devfs_ts_dir, "0raw", DEVFS_FL_DEFAULT,
tsMajor, TSRAW_MINOR, S_IFCHR | S_IRUSR | S_IWUSR,
&s3c2410_fops, NULL);
#endif
#ifdef CONFIG_PM
#if 0
tsdev.pm_dev = pm_register(PM_GP_DEV, PM_USER_INPUT,
s3c2410_ts_pm_callback);
#endif
tsdev.pm_dev = pm_register(PM_DEBUG_DEV, PM_USER_INPUT,
s3c2410_ts_pm_callback);
#endif
printk(DEVICE_NAME " initialized\n");
return 0;
tc_failed:
free_irq(IRQ_ADC_DONE, s3c2410_isr_adc);
adc_failed:
return ret;
}
