usbhostint.c

smartARM2400 USB host例程

/*****************************Copyright(c)****************************************************************
**                    Guangzhou ZHIYUAN electronics Co.,LTD.
**                                     
**                           http://www.embedtools.com
**
**------File Info-----------------------------------------------------------------------------------------
** File Name:            USBInt.c
** Latest modified Date: 2007-07-08        
** Latest Version:       V1.0    
** Description:          USB中断设置及处理
**                       
**--------------------------------------------------------------------------------------------------------
** Created By:           吴隆穗
** Created date:         2007-10-20    
** Version:              V1.0    
** Descriptions:         初始版本
**
**--------------------------------------------------------------------------------------------------------
** Modified by:          
** Modified date:        
** Version:              
** Description:          
**
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Description:
**
*********************************************************************************************************/
#include "USBHostConfig.h"


/*********************************************************************************************************
** Function name:       __usbHostIntInit
** Descriptions:        初始化中断寄存器
** input parameters:    None
** output parameters:   None
** Returned value:      None
*********************************************************************************************************/
void __usbHostIntInit (void)
{
    __GpsOhciReg->uiHcInterruptDisable = 0x7F | (0x03U << 30);          /*  禁止所有中断, 并禁止 MIE 位 */
    __GpsOhciReg->uiHcInterruptStatus = 0xC000007F;                     /*  清除所有中断标志            */

    OTGIntClr = OTGIntSt;                                               /*  清除中断标志                */
    OTGIntEn  = 1U << 3;                                                /*  使能主机中断                */
    USBIntSt |= 1U << 31;                                               /*  使能全局中断位              */
}

/*********************************************************************************************************
** Function name:       usbHostException
** Descriptions:        主机中断服务程序
** input parameters:    None
** output parameters:   None
** Returned value:      None
*********************************************************************************************************/
void usbHostException(void)
{
    USB_INT32U uiIntSt = 0;
    USB_INT8U  i;
    USB_INT32U uiTmp;
    
    VICVectAddr = 0;    
    
    uiIntSt = __GpsOhciReg->uiHcInterruptStatus & __GpsOhciReg->uiHcInterruptEnable;
    
    if ( uiIntSt & 0x01 ) {	                                        /*  Scheduling overrun          */
        __GpsOhciReg->uiHcInterruptStatus |= 0x01;
        uiTmp = __USB_SHED_SHEDOVERRUN << 24; 
        OSQPost(__GevtUsbMsgQeue, (void *)uiTmp);                   /*  发送消息给调度任务          */
        USBDEBUG_SENDSTR("\r\nSched or\r\n");
    }

    if ( uiIntSt & 0x02 ) {	                                        /*  Write back done             */

        uiTmp = *(USB_INT32U *)(__GpsOhciReg->uiHcHCCA + 0x84);
        __GpsOhciReg->uiHcInterruptStatus |= 0x02;
                                                                    
        uiTmp = (uiTmp >> 4) | (__USB_SHED_DONEHEAD << 24);         /*  bit27~bit24为传输完成链表的 */
                                                                    /*  高28位,bit31~bit28为事件类型*/
        OSQPost(__GevtUsbMsgQeue, (void *)uiTmp);                   /*  发送控制信息给调度任务      */
    }

    if ( uiIntSt & 0x04 ) {	                                        /*  SOF packet                  */
        __GpsOhciReg->uiHcInterruptStatus |= 0x04;
    }

    if ( uiIntSt & 0x08 ) {	                                        /*  Resume detected             */
        __GpsOhciReg->uiHcInterruptStatus |= 0x08;
        USBDEBUG_SENDSTR("\r\nResume det\r\n");
    }

    if ( uiIntSt & 0x10 ) {	                                        /*  Unrecoverable error         */
        __GpsOhciReg->uiHcInterruptStatus |= 0x10;
        uiTmp = __USB_SHED_UNRECERROR << 24; 
        OSQPost(__GevtUsbMsgQeue, (void *)uiTmp);                   /*  发送消息给调度任务          */
        USBDEBUG_SENDSTR("\r\nUnrecov err\r\n");
    }

    if ( uiIntSt & 0x20 ) {	                                        /*  Frame Number overflow       */
        __GpsOhciReg->uiHcInterruptStatus |= 0x20;
    }

    if ( uiIntSt & 0x40 ) {                                         /*  Root hub status change      */
        uiTmp = 0;
        __GpsOhciReg->uiHcInterruptStatus |= 0x40;                    
        for (i = 0; i < USB_MAX_PORTS; i++) {                       /*  依次判断哪个端口发生连接改变*/
            if (__GpsOhciReg->uiHcRhPortStatus[i] & (1 << 16)) {    /*  判断是否发生连接改变        */     
                uiTmp = (__USB_SHED_CONCHANGE << 24) | ((i + 1) << 8) | 
                        (__GpsOhciReg->uiHcRhPortStatus[i] & 0x01);
                OSQPost(__GevtUsbMsgQeue, (void *)uiTmp);           /*  发送消息给调度任务          */
                break;
            }
        }
        __ohciDisEnInt(__USB_INT_RHSC);                             /*  禁止连接改变中断            */
        USBDEBUG_SENDSTR("\r\nstat change\r\n");
    }

    if ( uiIntSt & 0x80 ) {                                         /*  Ownership change            */
        __GpsOhciReg->uiHcInterruptStatus |= 0x80;
        USBDEBUG_SENDSTR("\r\nOwnership change\r\n");
    }
    
}

/*********************************************************************************************************
  END FILE
*********************************************************************************************************/