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????????????/driver/input/touchscreen/s3c2410_ts.c


static int __init s3c2410ts_init(void)
{
       struct input_dev *input_dev;
       adc_clock = clk_get(NULL?? "adc");  //??????
       if (!adc_clock) {
              printk(KERN_ERR "failed to get adc clock source ");
              return -ENOENT;
       }
       clk_enable(adc_clock);   //??????
       base_addr=ioremap(S3C2410_PA_ADC??0x20);  //??????????????
       if (base_addr == NULL) {
              printk(KERN_ERR "Failed to remap register block ");
              return -ENOMEM;
       }
       s3c2410_ts_connect();  //?????????????
   //????????????????0xff
  iowrite32(S3C2410_ADCCON_PRSCEN| S3C2410_ADCCON_PRSCVL(0xFF)??base_addr+S3C2410_ADCCON);
       iowrite32(0xffff??  base_addr+S3C2410_ADCDLY); //???
   //????????ж?????????ж?
       iowrite32(WAIT4INT(0)?? base_addr+S3C2410_ADCTSC);
       input_dev = input_allocate_device();  //????input?豸
       if (!input_dev) {
              printk(KERN_ERR "Unable to allocate the input device !! ");
              return -ENOMEM;
       }
       dev = input_dev;
       //??????????????????
       dev->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS);
       dev->keybit[BITS_TO_LONGS(BTN_TOUCH)] = BIT(BTN_TOUCH);
       //????X??Χ??0-ox3ff???????????0?????????λ????0
       input_set_abs_params(dev?? ABS_X?? 0?? 0x3FF?? 0?? 0);
       input_set_abs_params(dev?? ABS_Y?? 0?? 0x3FF?? 0?? 0);
       input_set_abs_params(dev?? ABS_PRESSURE?? 0?? 1?? 0?? 0);
       dev->name = s3c2410ts_name;
       dev->id.bustype = BUS_RS232;
       dev->id.vendor = 0xDEAD;
       dev->id.product = 0xBEEF;
       dev->id.version = S3C2410TSVERSION;
        //????AD????ж?
if(request_irq(IRQ_ADC??stylus_action??IRQF_SHARED|IRQF_SAMPLE_RANDOM??"s3c2410_action"?? dev)) {
              printk(KERN_ERR "s3c2410_ts.c: Could not allocate ts IRQ_ADC ! ");
              iounmap(base_addr);
              return -EIO;
       }
       //???????ж?
       if (request_irq(IRQ_TC?? stylus_updown?? IRQF_SAMPLE_RANDOM??
                     "s3c2410_action"?? dev)) {
              printk(KERN_ERR "s3c2410_ts.c: Could not allocate ts IRQ_TC ! ");
              iounmap(base_addr);
              return -EIO;
       }
       printk(KERN_INFO "%s successfully loaded "?? s3c2410ts_name);
       input_register_device(dev);
       return 0;
}