ser2440_ser.c

wince底层驱动开发代码 ARM作为一种嵌入式系统处理器

PVOID
SerInitSerial(
       ULONG   Identifier, // @parm Device identifier.
       PVOID   pMddHead,   // @parm First argument to mdd callbacks.
       PHWOBJ  pHWObj      // @parm Pointer to our own HW OBJ for this device
)
{
	return (SerInit(FALSE, Identifier, pMddHead, pHWObj));
}

PVOID
SerInitIR(
       ULONG   Identifier, // @parm Device identifier.
       PVOID   pMddHead,   // @parm First argument to mdd callbacks.
       PHWOBJ  pHWObj      // @parm Pointer to our own HW OBJ for this device
)
{
	return (SerInit(TRUE, Identifier, pMddHead, pHWObj));
}



/*
 @doc OEM
 @func ULONG | SerClose | This routine closes the device identified by the PVOID returned by SerInit.
 *  Not exported to users, only to driver.
 *
 @rdesc The return value is 0.
 */
static
ULONG
SerClose(
        PVOID   pHead   // @parm PVOID returned by SerInit.
        )
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;
	ULONG  uTries;

	RETAILMSG (DEBUGMODE,(TEXT("+SerClose\r\n")));
	if ( pHWHead->cOpenCount )
	{
		DEBUGMSG (ZONE_CLOSE, (TEXT("SerClose, closing device\r\n")));
		pHWHead->cOpenCount--;

		// while we are still transmitting, sleep.
		uTries = 0;
		while((pHWHead->s2440COM.s2440SerReg->rUFSTAT & SER2440_FIFOSTAT_MASK) & (uTries++ < 100))		// TxFifo not empty..
		{
			DEBUGMSG (ZONE_CLOSE, (TEXT("SerClose, TX in progress.\r\n")));            
			Sleep(10);
		}

		// When the device is closed, we power it down.
		DEBUGMSG (ZONE_CLOSE, (TEXT("SerClose - Powering down UART\r\n")));
		pHWHead->fIRMode  = FALSE;
		SerSetOutputMode(pHWHead, FALSE, FALSE );

		DEBUGMSG (ZONE_CLOSE, (TEXT("SerClose - Calling SL_Close\r\n")));
		SL_Close( pHWHead );
	}

	RETAILMSG(DEBUGMODE,(TEXT("-SerClose\r\n")));
	return (0);
}

/*
 @doc OEM 
 @func PVOID | SerDeinit | Deinitializes device identified by argument.
 *  This routine frees any memory allocated by SerInit.
 *
 */
static
BOOL
SerDeinit(PVOID   pHead)   // @parm PVOID returned by SerInit.
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("SerDeinit \r\n")));
	if ( !pHWHead )
		return (FALSE);

	// Make sure device is closed before doing DeInit
	if ( pHWHead->cOpenCount )
		SerClose( pHead );

	SL_Deinit( pHead );

	if ( pHWHead->pBaseAddress )
		VirtualFree(pHWHead->pBaseAddress, 0, MEM_RELEASE);

	if ( pHWHead->pBootArgs )
		MmUnmapIoSpace( pHWHead->pBootArgs, sizeof(BOOT_ARGS) );

	// Free the HWObj
	LocalFree(pHWHead->pHWObj);

	// And now free the SER_INFO structure.
	LocalFree(pHWHead);

	return (TRUE);
}

/*
 @doc OEM
 @func	VOID | SerGetCommProperties | Retrieves Comm Properties.
 *
 @rdesc	None.
 */
static
VOID
SerGetCommProperties(
                    PVOID   pHead,      // @parm PVOID returned by SerInit. 
                    LPCOMMPROP  pCommProp   // @parm Pointer to receive COMMPROP structure. 
                    )
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;
	RETAILMSG(DEBUGMODE,(TEXT("+SerGetCommProperties\r\n")));
	*pCommProp = pHWHead->CommProp;
	return;
}


/*
 @doc OEM
 @func VOID | SerSetBaudRate |
 * This routine sets the baud rate of the device.
 *  Not exported to users, only to driver.
 *
 @rdesc None.
 */
static
BOOL
SerSetBaudRate(
              PVOID   pHead,  // @parm     PVOID returned by SerInit
              ULONG   BaudRate    // @parm     ULONG representing decimal baud rate.
              )
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("IRDA : SerSetBaudRate \r\n")));
	// If we are running in IR mode, try to set the IR baud
	// first, since it supports a subset of the rates supported
	// by the UART.  If we fail setting the IR rate, then
	// return an error and leave the UART alone.
	if ( IRDA )
	{
		if ( ! SerSetIRBaudRate( pHWHead, BaudRate ) )
		{
			DEBUGMSG (ZONE_ERROR, 
				(TEXT("Unsupported IR BaudRate\r\n")));
			// We should return an error, but vtbl doesn't expect one
			return (FALSE); 
		}
	}

	// Now set buadrate on the UART
	return ( SL_SetBaudRate( pHead, BaudRate ) );    
}

/*
 @doc OEM
 @func BOOL | SerPowerOff |
 *  Called by driver to turn off power to serial port.
 *  Not exported to users, only to driver.
 *
 @rdesc This routine returns a status.
 */
BOOL
SerPowerOff(PVOID   pHead)       // @parm	PVOID returned by SerInit.
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("SerPowerOff\r\n")));
	SerClose( pHWHead );
	// First, power down the UART
	SL_PowerOff( pHWHead );

	// And then disable our IR and 9 Pin interface
	SerSetOutputMode( pHWHead, FALSE, FALSE );

	return (TRUE);
}

/*
 @doc OEM
 @func BOOL | SerPowerOn |
 *  Called by driver to turn on power to serial port.
 *  Not exported to users, only to driver.
 *
 @rdesc This routine returns a status.
 */
BOOL
SerPowerOn(PVOID   pHead)       // @parm	PVOID returned by SerInit.
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("SerPowerOn\r\n")));
	// First, power up the UART
	SL_PowerOn( pHWHead );

	// And then enable our IR interface (if needed)
	SerSetOutputMode( pHWHead, pHWHead->fIRMode, !pHWHead->fIRMode );
	return (TRUE);
}

/*
 @doc OEM
 @func BOOL | SerEnableIR | This routine enables ir.
 *  Not exported to users, only to driver.
 *
 @rdesc Returns TRUE if successful, FALSEotherwise.
 */
static
BOOL
SerEnableIR(
           PVOID   pHead, // @parm PVOID returned by Serinit.
           ULONG   BaudRate  // @parm PVOID returned by HWinit.
           )
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("SerEnableIR\r\n")));
	pHWHead->fIRMode  = TRUE;
	SerSetOutputMode( pHWHead, pHWHead->fIRMode, !pHWHead->fIRMode );
	return (TRUE);
}

/*
 @doc OEM
 @func BOOL | SerDisableIR | This routine disable the ir.
 *  Not exported to users, only to driver.
 *
 @rdesc Returns TRUE if successful, FALSEotherwise.
 */
static
BOOL
SerDisableIR(PVOID   pHead)		// @parm PVOID returned by Serinit.
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("SerDisableIR\r\n")));
	pHWHead->fIRMode  = FALSE;
	SerSetOutputMode( pHWHead, pHWHead->fIRMode, !pHWHead->fIRMode );
	return (TRUE);
}

/*
 @doc OEM
 @func BOOL | SerEnableIR | This routine enables ir.
 *  Not exported to users, only to driver.
 *
 @rdesc Returns TRUE if successful, FALSEotherwise.
 */
static
BOOL
SerEnableSerial(
           PVOID   pHead, // @parm PVOID returned by Serinit.
           ULONG   BaudRate  // @parm PVOID returned by HWinit.
           )
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("SerEnableSerial\r\n")));
	pHWHead->fIRMode  = FALSE;
	SerSetOutputMode( pHWHead, pHWHead->fIRMode, !pHWHead->fIRMode );
	return (TRUE);
}

/*
 @doc OEM
 @func BOOL | SerDisableIR | This routine disable the ir.
 *  Not exported to users, only to driver.
 *
 @rdesc Returns TRUE if successful, FALSEotherwise.
 */
static
BOOL
SerDisableSerial(PVOID   pHead)		// @parm PVOID returned by Serinit.
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	RETAILMSG(DEBUGMODE,(TEXT("SerDisableSerial\r\n")));

	pHWHead->fIRMode  = TRUE;
	SerSetOutputMode( pHWHead, pHWHead->fIRMode, !pHWHead->fIRMode );
	return (TRUE);
}


/*
 @doc OEM
 @func BOOL | SerOpen | This routine is called when the port is opened.
 *  Not exported to users, only to driver.
 *
 @rdesc Returns TRUE if successful, FALSEotherwise.
 */
static
BOOL
SerOpen(PVOID   pHead)		// @parm PVOID returned by Serinit.
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;

	// Disallow multiple simultaneous opens
	if ( pHWHead->cOpenCount )
		return (FALSE);

#ifdef EXAMINE_BOOTARGS
	RETAILMSG(DEBUGMODE, (TEXT("SerOpen - Bootargs ComPort %x\r\n"), pHWHead->pBootArgs->ucComPort));
	// If the port is in use as a debugger port, don't allow opens.
	if ( ((pHWHead->pBootArgs->ucComPort == 1) && (pHWHead->dwIOBase == COM1_BASE)) ||
		((pHWHead->pBootArgs->ucComPort == 2) && (pHWHead->dwIOBase == COM2_BASE)) || 
		((pHWHead->pBootArgs->ucComPort == 3) && (pHWHead->dwIOBase == COM3_BASE)) ||
		((pHWHead->pBootArgs->ucComPort == 4) && (pHWHead->dwIOBase == COM4_BASE)) )
	{
		RETAILMSG (DEBUGMODE, (TEXT("SerOpen - Fail open of debug port\r\n")));        
		return (FALSE);        
	}
#endif

	pHWHead->cOpenCount++;

	if ( pHWHead->fIRMode == TRUE )
		RETAILMSG(DEBUGMODE,(TEXT("Use IrDA \r\n")));
	else
		RETAILMSG(DEBUGMODE,(TEXT("Use Serail \r\n")));
	SerSetOutputMode(pHWHead, pHWHead->fIRMode, !pHWHead->fIRMode );  

	// NOTE: - If we wanted to support 16450s, we'll could dynamically
	// identify them here.

	// Init SER2440 info
	RETAILMSG(DEBUGMODE, (TEXT("SerOpen - Calling SL_Open\r\n")));
	SL_Open( pHWHead );
	RETAILMSG(DEBUGMODE, (TEXT("SerOpen - Return TRUE\r\n")));

	return (TRUE);
}

const
HW_VTBL IoVTbl = {
	SerInitSerial,
	SL_PostInit,
	SerDeinit,
	SerOpen,
	SerClose,
	SL_GetInterruptType,
	SL_RxIntr,
	SL_TxIntrEx,
	SL_ModemIntr,
	SL_LineIntr,
	SL_GetRxBufferSize,
	SerPowerOff,
	SerPowerOn,
	SL_ClearDTR,
	SL_SetDTR,
	SL_ClearRTS,
	SL_SetRTS,
	SerEnableSerial,
	SerDisableSerial,
	SL_ClearBreak,
	SL_SetBreak,
	SL_XmitComChar,
	SL_GetStatus,
	SL_Reset,
	SL_GetModemStatus,
	SerGetCommProperties,
	SL_PurgeComm,
	SL_SetDCB,
	SL_SetCommTimeouts,
	};
extern const HW_VTBL SerCardIoVTbl;

const
HW_VTBL IrVTbl = {
	SerInitIR,
	SL_PostInit,
	SerDeinit,
	SerOpen,
	SerClose,
	SL_GetInterruptType,
	SL_RxIntr,
	SL_TxIntrEx,
	SL_ModemIntr,
	SL_LineIntr,
	SL_GetRxBufferSize,
	SerPowerOff,
	SerPowerOn,
	SL_ClearDTR,
	SL_SetDTR,
	SL_ClearRTS,
	SL_SetRTS,
	SerEnableIR,
	SerDisableIR,
	SL_ClearBreak,
	SL_SetBreak,
	SL_XmitComChar,
	SL_GetStatus,
	SL_Reset,
	SL_GetModemStatus,
	SerGetCommProperties,
	SL_PurgeComm,
	SL_SetDCB,
	SL_SetCommTimeouts,
	};
extern const HW_VTBL SerCardIrVTbl;

const HWOBJ IoObj = {
	THREAD_AT_INIT,
	SYSINTR_SERIAL,
	(PHW_VTBL) &IoVTbl
};

const HWOBJ IrObj = {
	THREAD_AT_INIT,
	SYSINTR_IR,
	(PHW_VTBL) &IrVTbl
};

typedef HWOBJ const *PCHWOBJ;

const PCHWOBJ HWObjects[] = {
	&IoObj,
	&IrObj
};

// GetSerialObj : The purpose of this function is to allow multiple PDDs to be
// linked with a single MDD creating a multiport driver.  In such a driver, the
// MDD must be able to determine the correct vtbl and associated parameters for
// each PDD.  Immediately prior to calling HWInit, the MDD calls GetSerialObject
// to get the correct function pointers and parameters.
//
PHWOBJ
GetSerialObject(DWORD DeviceArrayIndex)
{
	PHWOBJ pSerObj;

	RETAILMSG(DEBUGMODE,(TEXT("IRDA : GetSerialObject\r\n")));

	IRDA = DeviceArrayIndex;

	// Now return this structure to the MDD.
	if ( DeviceArrayIndex == 0 )
		pSerObj = (PHWOBJ)(&IoObj);
	else
		pSerObj = (PHWOBJ)(&IrObj);
	return (pSerObj);
}