sl811hst.c

该原码包含有wince 和 linux 的移植和应用原码

// s    = return buffer address where data are to be save/read
// c	= buffer data length
//*****************************************************************************************
void SL811BufRead(BYTE addr, BYTE *s, BYTE c)
{	
	Uart_Printf("(");
	outportb(addr, SL811H_ADDR);	
   	while (c--)
   	{   		
		*s = inportb(SL811H_DATA);
		Uart_Printf("%x,", *s);
		s++;
	}
		Uart_Printf(")\n");
}

//*****************************************************************************************
// Buffer Write  to SL811H
// addr = buffer start address
// s    = buffer address where data are to be written
// c	= buffer data length
//*****************************************************************************************
void SL811BufWrite(BYTE addr, BYTE *s, BYTE c)
{
	Uart_Printf("[");
	outportb(addr, SL811H_ADDR);
	
   	while (c--) 
   	{
   		Uart_Printf("%x,", *s);
		outportb(*s, SL811H_DATA);
		s++;
	}
		Uart_Printf("]\n");
}
//*****************************************************************************************
// Swap high and low byte 
//*****************************************************************************************
WORD WordSwap(WORD input)
{
	return(((input&0x00FF)<<8)|((input&0xFF00)>>8));
}

//*****************************************************************************************
// UsbReset during enumeration of device attached directly to SL811HS
//*****************************************************************************************
void USBReset()
{
	BYTE tmp;
    tmp =  SL811Read(CtrlReg);   
 	SL811Write(CtrlReg,tmp|0x08);
	EZUSB_Delay(25);			
    SL811Write(CtrlReg,tmp);    
}

//*****************************************************************************************
// usbXfer:
// successful transfer = return TRUE
// fail transfer = return FALSE
//*****************************************************************************************
int usbXfer(BYTE usbaddr, BYTE endpoint, BYTE pid, BYTE iso, WORD wPayload, WORD wLen, BYTE *buffer)
{  
	xdata BYTE 	cmd, result, timeout, intr;
	xdata BYTE	xferLen, bufLen, data0, data1, dataX, addr;
	
	//------------------------------------------------
	// Default setting for usb trasnfer
	//------------------------------------------------
	bufLen = dataX = timeout = 0;					//reset all
	data0 = EP0_Buf;								// DATA0 buffer address
	data1 = data0 + (BYTE)wPayload;					// DATA1 buffer address
	DATA_STOP =	TIMEOUT_ERR = FALSE;				// set default conditions

	//------------------------------------------------
	// Define data transfer payload
	//------------------------------------------------
	if (wLen >= wPayload)  							// select proper data payload
		xferLen = wPayload;							// limit to wPayload size 
	else											// else take < payload len
		xferLen = wLen;								//	

	//------------------------------------------------
	// For IN token
	//------------------------------------------------
	if (pid==PID_IN)								// for current IN tokens
	{												//
		if(FULL_SPEED)								//
			cmd = sDATA0_RD;						// FS/FS on Hub, sync to sof
		else										// LS, no sync to sof for IN
			cmd = DATA0_RD;							//
		//-------------------------------------------- response to OUT can propagate to SL811HS
		// handling LS device on HUB
		//--------------------------------------------
		if(HUB_DEVICE && usbaddr!=HUB_ADDR)			// Transfer on Hub, USB addr #0, #2..#5 only
		{
			if(uHub.bPortSpeed[usbaddr])			// If transfer of LS on Hub & previous is			
				cmd = psDATA0_RD;					// SETUP & current is IN, no sync to sof,
		}
	}
	//------------------------------------------------
	// For OUT token
	//------------------------------------------------
	else if(pid==PID_OUT)							// for OUT tokens
	{  	
		if(xferLen)									// only when there are	
			SL811BufWrite(data0,buffer,xferLen); 	// data to transfer on USB

		if(FULL_SPEED)								
			cmd = sDATA0_WR;						// FS/FS on Hub, sync to sof
		else										// LS, no sync to sof for OUT
			cmd = DATA0_WR;							
		//--------------------------------------------
		// handling LS device on HUB
		//--------------------------------------------
		if(HUB_DEVICE && usbaddr!=HUB_ADDR)			// Transfer on Hub, USB addr #0, #2..#5 only
		{
			if(uHub.bPortSpeed[usbaddr])			// If transfer of LS on Hub, previous
				cmd = psDATA0_WR;
		}
		// implement data toggle
		bData1 = uDev[usbaddr].bData1[endpoint];
        uDev[usbaddr].bData1[endpoint] = (uDev[usbaddr].bData1[endpoint] ? 0 : 1); // DataToggle
		if(bData1)
          cmd |= 0x40;                              // Set Data1 bit in command
	}
	//------------------------------------------------
	// For SETUP/OUT token
	//------------------------------------------------
	else											// for current SETUP/OUT tokens
	{  	
		if(xferLen)									// only when there are	
			SL811BufWrite(data0,buffer,xferLen); 	// data to transfer on USB

		if(FULL_SPEED)								
			cmd = sDATA0_WR;						// FS/FS on Hub, sync to sof
		else										// LS, no sync to sof for OUT
			cmd = DATA0_WR;							
		//--------------------------------------------
		// handling LS device on HUB
		//--------------------------------------------
		if(HUB_DEVICE && usbaddr!=HUB_ADDR)			// Transfer on Hub, USB addr #0, #2..#5 only
		{
			if(uHub.bPortSpeed[usbaddr])			// If transfer of LS on Hub, previous
				cmd = psDATA0_WR;
		}
	}

	//------------------------------------------------
	// Isochronous data transfer setting
	//------------------------------------------------
	if (iso) 
		cmd |= ISO_BIT;                     		// if iso setup ISO mode

	//------------------------------------------------
	// For EP0's IN/OUT token data, start with DATA1
	// Control Endpoint0's status stage.
	// For data endpoint, IN/OUT data, start ????
	//------------------------------------------------
	if (endpoint == 0 && pid != PID_SETUP) 			// for Ep0's IN/OUT token
		cmd |= 0x40; 								// always set DATA1

	//------------------------------------------------
	// Arming of USB data transfer for the first pkt
	//------------------------------------------------
	SL811Write(EP0Status,((endpoint&0x0F)|pid));	// PID + EP address
	SL811Write(EP0Counter,usbaddr);					// USB address
	SL811Write(EP0Address,data0);					// buffer address, start with "data0"
	SL811Write(EP0XferLen,xferLen);					// data transfer length
	SL811Write(IntStatus,INT_CLEAR); 				// clear interrupt status
	SL811Write(EP0Control,cmd);						// Enable ARM and USB transfer start here
	//	printf("[%x,%x,%x,%x,%x]\n", ((endpoint&0x0F)|pid), usbaddr, data0, xferLen, cmd);
		
	//------------------------------------------------
	// Main loop for completing a wLen data trasnfer
	//------------------------------------------------
	while(TRUE)
	{   
		//---------------Wait for done interrupt------------------
		while(TRUE)												// always ensure requested device is
		{														// inserted at all time, then you will
			intr = SL811Read(IntStatus);						// wait for interrupt to be done, and 
			if(/*(intr & USB_RESET) || */(intr & INSERT_REMOVE))	// proceed to parse result from slave 
			{													// device.					
				DATA_STOP = TRUE;								// if device is removed, set DATA_STOP
				return FALSE;									// flag true, so that main loop will 
			}													// know this condition and exit gracefully
			if(intr & USB_A_DONE)								
				break;											// interrupt done !!!
		}

		SL811Write(IntStatus,INT_CLEAR); 						// clear interrupt status
		result 	  = SL811Read(EP0Status);						// read EP0status register
		remainder = SL811Read(EP0Counter);						// remainder value in last pkt xfer
			
		Uart_Printf("EP0 Status %x\n", result);

		//-------------------------ACK----------------------------
		if (result & EP0_ACK)									// Transmission ACK
		{	

			// SETUP TOKEN
			if(pid == PID_SETUP)								// do nothing for SETUP/OUT token 
				break;											// exit while(1) immediately

			// OUT TOKEN				
			else if(pid == PID_OUT)
				break;

			// IN TOKEN
			else if(pid == PID_IN)
			{													// for IN token only
				wLen  -= (WORD)xferLen;							// update remainding wLen value
				cmd   ^= 0x40;    								// toggle DATA0/DATA1
				dataX++;										// point to next dataX

				//------------------------------------------------	
				// If host requested for more data than the slave 
				// have, and if the slave's data len is a multiple
				// of its endpoint payload size/last xferLen. Do 
				// not overwrite data in previous buffer.
				//------------------------------------------------	
				if(remainder==xferLen)							// empty data detected
					bufLen = 0;									// do not overwriten previous data
				else											// reset bufLen to zero
					bufLen = xferLen;							// update previous buffer length
				
				//------------------------------------------------	
				// Arm for next data transfer when requested data 
				// length have not reach zero, i.e. wLen!=0, and
				// last xferlen of data was completed, i.e.
				// remainder is equal to zero, not a short pkt
				//------------------------------------------------	
				if(!remainder && wLen)							// remainder==0 when last xferLen
				{												// was all completed or wLen!=0
					addr    = (dataX & 1) ? data1:data0; 		// select next address for data
					xferLen = (BYTE)(wLen>=wPayload) ? wPayload:wLen;	// get data length required
					if (FULL_SPEED)								// sync with SOF transfer
						cmd |= 0x20;							// always sync SOF when FS, regardless 
					SL811Write(EP0XferLen, xferLen); 			// select next xfer length
					SL811Write(EP0Address, addr);           	// data buffer addr 
					SL811Write(IntStatus,INT_CLEAR);			// is a LS is on Hub.
					SL811Write(EP0Control,cmd);					// Enable USB transfer and re-arm
				}				

				//------------------------------------------------
				// Copy last IN token data pkt from prev transfer
				// Check if there was data available during the
				// last data transfer
				//------------------------------------------------
				if(bufLen)										
				{	
					SL811BufRead(((dataX&1)?data0:data1), buffer, bufLen);
					buffer += bufLen;								
				}

				//------------------------------------------------
				// Terminate on short packets, i.e. remainder!=0
				// a short packet or empty data packet OR when 
				// requested data len have completed, i.e.wLen=0
				// For a LOWSPEED device, the 1st device descp,
				// wPayload is default to 64-byte, LS device will
				// only send back a max of 8-byte device descp,
				// and host detect this as a short packet, and 
				// terminate with OUT status stage
				//------------------------------------------------
				if(remainder || !wLen)
					break;
			}							
		}
		
		//-------------------------NAK----------------------------
		if (result & EP0_NAK)									// NAK Detected
		{														
			if(endpoint==0)										// on ep0 during enumeration of LS device
			{													// happen when slave is not fast enough,
				SL811Write(IntStatus,INT_CLEAR);				// clear interrupt status, need to
				SL811Write(EP0Control,cmd);						// re-arm and request for last cmd, IN token
                result = 0;                                     // respond to NAK status only
			}
			else												// normal data endpoint, exit now !!! , non-zero ep
				break;											// main loop control the interval polling
		}
		
		//-----------------------TIMEOUT--------------------------
		if (result & EP0_TIMEOUT)								// TIMEOUT Detected
		{														
			if(endpoint==0)										// happens when hub enumeration