drv_usb_irq.c

sparc硬件平台上的usb驱动

/************************************************* 
Copyright (C), 2007, DTK Computer. 
    File name: drv_usb_irq.c 
    Author: MMI Group    Version: 1.0    Date: 2008.04.30 
    Description: usb module for interrupt 
    Others:  
    Function List: 
    History:  
        <author>    <time>    <version >    <desc> 
         Bosco Lee  08/30/04  1.0 build     this moudle 
*************************************************/
#include "drv_usb_irq.h"

extern void usb_mainthread ();
usb_mainthread ()
{

    init_usb_descriptor ();

    while (1)
    {
	  if (usb_exit == 1)
	    {
		break;
	    }
		usbserve();
	    	usb_halt ();
	 //	sleep (1);
    }

//      pthread_mutex_unlock(&usb_mutex);
    thread_usb = 0;
}


/***********************************************************************
 ** 函数名称: void Usb_Exception(void)
 ** 功能描述: USB中断服务程序
 			  判断中断类型
 *************************************************************************/
void
Usb_Exception (void)
{
    D_UINT8 i_st;

    DISABLE ();			//进入USB中断服务程序时关中断

    bEPPflags.bits.in_isr = 1;
    i_st = USB_ReadInterruptRegister ();	//读取PDIUSBUSB中断寄存器值
    if (i_st != 0)
    {
	  if (i_st & SC_TRANS_DONE_BIT)
	  {
		USB_ClearInterruptRegister (SC_TRANS_DONE_BIT);
		bEPPflags.bits.trans_done = 1;
		usb_unhalt ();	
		frm_printf ("trans_done done");
	  }

	  if (i_st & SC_SUSPEND_INT_BIT)
	  {
		USB_ClearInterruptRegister (SC_SUSPEND_INT_BIT);
		sleep(2);
		frm_printf ("suspend done");
	  }

	  if (i_st & SC_RESUME_INT_BIT)
	  {
		USB_ClearInterruptRegister (SC_RESUME_INT_BIT);
		sleep(2);
		frm_printf ("resume done");
	  }

	  if (i_st & SC_RESET_EVENT_BIT)
	  {
	      USB_ClearInterruptRegister (SC_RESET_EVENT_BIT);
		
		  frm_printf ("reseting ");
		  bEPPflags.bits.bus_reset = 1;
		  usb_unhalt ();			

	  }
	  if (i_st & SC_SOF_RECEIVED_BIT)
	  {
		  USB_ClearInterruptRegister (SC_SOF_RECEIVED_BIT);
		  sleep(2);
		  frm_printf ("SOF done");
	  }
	  if (i_st & SC_NAK_SENT_INT_BIT)
	  {
		  USB_ClearInterruptRegister (SC_NAK_SENT_INT_BIT);
		  sleep(2); 
		  frm_printf ("NAK-set done");
	  }
    }
    bEPPflags.bits.in_isr = 0;

    ENABLE ();			//退出USB中断服务程序时开中断
}