usblib.c

基于arm9的,usb设备(u盘)的读写操作实现.

/****************************************************************
 NAME: usblib.c
 DESC: S3C2410X USB library functions
 HISTORY:
 Mar.25.2002:purnnamu: ported for S3C2410X.
 Mar.27.2002:purnnamu: DMA is enabled.
 ****************************************************************/
#include <string.h>
#include "option.h"
#include "2410addr.h"
#include "2410lib.h"
#include "def.h"

#include "2410usb.h"
#include "usbmain.h"
#include "usblib.h"
#include "usbsetup.h"


void ConfigUsbd(void)
{

    ReconfigUsbd();
  
    rINTMSK&=~(BIT_USBD); //Just only enable USBD INT @0x4a000008=0xFDFFFFFF
}


void ReconfigUsbd(void)
{
// *** End point information ***
//   EP0: control
//   EP1: bulk in end point
//   EP2: not used
//   EP3: bulk out end point
//   EP4: not used
    
    rPWR_REG=PWR_REG_DEFAULT_VALUE;	//disable suspend mode

    rINDEX_REG=0;	
    rMAXP_REG=FIFO_SIZE_8;   	//EP0 max packit size = 8 
    rEP0_CSR=EP0_SERVICED_OUT_PKT_RDY|EP0_SERVICED_SETUP_END;	
 				//EP0:clear OUT_PKT_RDY & SETUP_END
    rINDEX_REG=1;
    #if (EP1_PKT_SIZE==32)
        rMAXP_REG=FIFO_SIZE_32;	//EP1:max packit size = 32
    #else
	rMAXP_REG=FIFO_SIZE_64;	//EP1:max packit size = 64
    #endif	
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT;	
#ifdef _FOR_UDISK_
	if(USBD_flg==0)
	    	rIN_CSR2_REG=EPI_MODE_IN|EPI_IN_DMA_INT_MASK|EPI_BULK; //IN mode, IN_DMA_INT=masked    
	else if(USBD_flg==1)
		rIN_CSR2_REG=EPI_MODE_IN|EPI_IN_DMA_INT_MASK|EPI_BULK|EPI_AUTO_SET;
#else
	rIN_CSR2_REG=EPI_MODE_IN|EPI_IN_DMA_INT_MASK|EPI_BULK; //IN mode, IN_DMA_INT=masked   
#endif
    rOUT_CSR1_REG=EPO_CDT;   	
    rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK;   	

    rINDEX_REG=2;
    rMAXP_REG=FIFO_SIZE_64;	//EP2:max packit size = 64
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT|EPI_BULK;
    rIN_CSR2_REG=EPI_MODE_IN|EPI_IN_DMA_INT_MASK; //IN mode, IN_DMA_INT=masked    
    rOUT_CSR1_REG=EPO_CDT;   	
    rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK;   	

    rINDEX_REG=3;
    #if (EP3_PKT_SIZE==32)
        rMAXP_REG=FIFO_SIZE_32;	//EP3:max packit size = 32
    #else
	rMAXP_REG=FIFO_SIZE_64;	//EP3:max packit size = 64
    #endif	
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT|EPI_BULK;
    rIN_CSR2_REG=EPI_MODE_OUT|EPI_IN_DMA_INT_MASK; //OUT mode, IN_DMA_INT=masked    
    rOUT_CSR1_REG=EPO_CDT;   	
    	//clear OUT_PKT_RDY, data_toggle_bit.
	//The data toggle bit should be cleared when initialization.
#ifdef _FOR_UDISK_
	if(USBD_flg==0)
    		rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK;   	
	else if(USBD_flg==1)
		rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK|EPO_AUTO_CLR; 
#else
	rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK;  
#endif

    rINDEX_REG=4;
    rMAXP_REG=FIFO_SIZE_64;	//EP4:max packit size = 64
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT|EPI_BULK;
    rIN_CSR2_REG=EPI_MODE_OUT|EPI_IN_DMA_INT_MASK; //OUT mode, IN_DMA_INT=masked    
    rOUT_CSR1_REG=EPO_CDT;   	
    	//clear OUT_PKT_RDY, data_toggle_bit.
	//The data toggle bit should be cleared when initialization.
    rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK;   	
    
    rEP_INT_REG=EP0_INT|EP1_INT|EP2_INT|EP3_INT|EP4_INT;
    rUSB_INT_REG=RESET_INT|SUSPEND_INT|RESUME_INT; 
    	//Clear all usbd pending bits
    	
    //EP0,1,3 & reset interrupt are enabled
    rEP_INT_EN_REG=EP0_INT|EP1_INT|EP3_INT;
    rUSB_INT_EN_REG=RESET_INT;
    ep0State=EP0_STATE_INIT;
    
}


void RdPktEp0(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP0_FIFO;	
    }
}
    

void WrPktEp0(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP0_FIFO=buf[i];	
    }
}


void WrPktEp1(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP1_FIFO=buf[i];	
    }
}


void WrPktEp2(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP2_FIFO=buf[i];	
    }
}


void RdPktEp3(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP3_FIFO;	
    }
}


void RdPktEp4(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP4_FIFO;	
    }
}


void ConfigEp3DmaMode(U32 bufAddr,U32 count)
{
	//DMA_ch0 for USB_EP1 ..
	//DMA_ch1 for USB_EP2 ..
	//DMA_ch2 for USB_EP3 ..
	//DMA_ch3 for USB_EP4 ..
	//Reference P8-2 of S3C2410x01
    int i;

    rINDEX_REG=3;
    count=count&0xfffff; //transfer size should be <1MB
    
    rDISRCC2=(1<<1)|(1<<0);//DMA2 initial source control(0x4B000084)=(APB/Fixed)
    rDISRC2=ADDR_EP3_FIFO; //DMA2 initial source address(0x4B000080)=EP3_FIFO
    rDIDSTC2=(0<<1)|(0<<0);//DMA2 initial destinatio control(0x4B00008C)=(AHB/Increament)
    rDIDST2=bufAddr;       //DMA2 initial destination address(0x4B000088)=bufAddr

#if USBDMA_DEMAND
	//rDCON2=0x4B000090
    rDCON2=(count)|(0<<31)|(0<<30)|(1<<29)|(0<<28)|(0<<27)|(4<<24)|(1<<23)|(0<<22)|(0<<20); 
    //demand,requestor=APB,CURR_TC int enable,unit transfer,
    //single service,src=USBD,H/W request,autoreload,byte,CURR_TC
#else
    rDCON2=(count)|(1<<31)|(0<<30)|(1<<29)|(0<<28)|(0<<27)|(4<<24)|(1<<23)|(0<<22)|(0<<20); 
    //handshake,requestor=APB,CURR_TC int enable,unit transfer,
    //single service,src=USBD,H/W request,autoreload,byte,CURR_TC
#endif        
    rDMASKTRIG2= (1<<1);//DMA 2 turned on

    //rEP3_DMA_FIFO=0x40; //not needed for OUT operation. 	

    rEP3_DMA_TTC_L=0xff;
    rEP3_DMA_TTC_M=0xff;
    rEP3_DMA_TTC_H=0x0f;

    rOUT_CSR2_REG=rOUT_CSR2_REG|EPO_AUTO_CLR|EPO_OUT_DMA_INT_MASK; 
    //AUTO_CLR(OUT_PKT_READY is cleared automatically), interrupt_masking.

#if USBDMA_DEMAND
    rEP3_DMA_UNIT=EP3_PKT_SIZE; //DMA transfer unit=64 bytes
    rEP3_DMA_CON=UDMA_DEMAND_MODE|UDMA_OUT_DMA_RUN|UDMA_DMA_MODE_EN; 
    // deamnd enable,out_dma_run=run,in_dma_run=stop,DMA mode enable
#else        
    rEP3_DMA_UNIT=0x01; //DMA transfer unit=1byte
    rEP3_DMA_CON=UDMA_OUT_DMA_RUN|UDMA_DMA_MODE_EN;
    // deamnd disable,out_dma_run=run,in_dma_run=stop,DMA mode enable
#endif  
    //wait until DMA_CON is effective.
    rEP3_DMA_CON;
    for(i=0;i<10;i++);    	
}


void ConfigEp3IntMode(void)
{
    rINDEX_REG=3;
    
    rDMASKTRIG2= (0<<1);  // EP3=DMA ch 2
        //DMA channel off
    rOUT_CSR2_REG=rOUT_CSR2_REG&~(EPO_AUTO_CLR/*|EPO_OUT_DMA_INT_MASK*/); 
    	//AUTOCLEAR off,interrupt_enabled (???)
    rEP3_DMA_UNIT=1;	
    rEP3_DMA_CON=0; 
    	// deamnd disable,out_dma_run=stop,in_dma_run=stop,DMA mode disable
    //wait until DMA_CON is effective.
    rEP3_DMA_CON;
    
}