s3c_mfc_irq分析

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源码比较简单

1:

   2:  static irqreturn_t s3c_mfc_irq(int irq, void *dev_id)

   3:  {

   4:      unsigned int    intReason;

   5:      s3c_mfc_inst_context_t      *pMfcInst;

6:

7:

   8:      pMfcInst = (s3c_mfc_inst_context_t *)dev_id;

9:

  10:      intReason   = s3c_mfc_intr_reason();

11:

  12:      /* if PIC_RUN, buffer full and buffer empty interrupt */

  13:      if (intReason & S3C_MFC_INTR_ENABLE_RESET) {

  14:          s3c_mfc_intr_type = intReason;

  15:          wake_up_interruptible(&s3c_mfc_wait_queue);

  16:      }

17:

  18:      s3c_mfc_clear_intr();

19:

  20:      return IRQ_HANDLED;

  21:  }

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s3c_mfc_intr_reason函数检查INT_REASON寄存器(the interrupt reason register) 的值

wake_up_interruptible为wait.h（include/linux）下，故和系统有关，需要修改。