s3c2410xsio.c

S3C2410开发板的VXWORKS开发包

*/

LOCAL int s3c2410xPollInput
    (
    SIO_CHAN *    pSioChan,
    char *        thisChar
    )
    {
    S3C2410X_CHAN * pChan = (S3C2410X_CHAN *)pSioChan;
    UINT32    status;


    S3C2410X_SIO_REG_READ (pChan,S3C2410X_USTAT, status);

    if ((status & USTAT_RX_AVAIL) == 0x00)
        return (EAGAIN);    


    S3C2410X_SIO_REG_READ(pChan, S3C2410X_URXBUF, *thisChar);
	
    return (OK);
    }

/******************************************************************************
*
* s3c2410xModeSet - toggle between interrupt and polled mode
*
* RETURNS: OK on success, EIO on unsupported mode.
*/

LOCAL int s3c2410xModeSet
    (
    S3C2410X_CHAN * pChan,        /* channel */
    uint_t          newMode       /* new mode */
    )
    {
    UINT32    temp;
	UINT32	tempUINT32;

    if ((newMode != SIO_MODE_POLL) && (newMode != SIO_MODE_INT))    
    	return (EIO);


    if ((newMode == SIO_MODE_INT) && (!s3c2410xIntrMode))
    	return (EIO);


    pChan->mode = newMode;

    if (pChan->mode == SIO_MODE_INT)
    {
    	switch((int)(pChan->regs))
		{	
		case SERIAL_B_BASE_ADR:
			s3c2410x_INT_REG_WRITE(S3C2410X_SUBSRCPND, ((1<<SUBINT_LVL_TXD1)|(1<<SUBINT_LVL_RXD1)));
			break;
		case SERIAL_A_BASE_ADR:
		default:
			s3c2410x_INT_REG_WRITE(S3C2410X_SUBSRCPND, ((1<<SUBINT_LVL_TXD0)|(1<<SUBINT_LVL_RXD0)));			
		}
		
        intEnable(pChan->intLevelRx);
		
        S3C2410X_SIO_REG_READ(pChan, S3C2410X_UCON, temp);
        temp &=UCON_RX_TX_RESET;    
        temp |= (UCON_RX|UCON_TX);
        S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UCON, temp);
		
		
		
		s3c2410x_INT_REG_READ(S3C2410X_INTSUBMSK,tempUINT32);		
		switch((int)(pChan->regs))
		{		
		case SERIAL_B_BASE_ADR:
			tempUINT32 &= ~((1<<SUBINT_LVL_RXD1)|(1<<SUBINT_LVL_TXD1));
			break;
		case SERIAL_A_BASE_ADR:
		default:
			tempUINT32 &= ~((1<<SUBINT_LVL_RXD0)|(1<<SUBINT_LVL_TXD0));
			
		}
		s3c2410x_INT_REG_WRITE(S3C2410X_INTSUBMSK,tempUINT32);
    }
    else
    {
        S3C2410X_SIO_REG_READ(pChan, S3C2410X_UCON, temp);
        temp &=UCON_RX_TX_RESET;   
        temp |= (UCON_RX|UCON_TX);
        S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UCON, temp);
		
		intDisable (pChan->intLevelRx);

		s3c2410x_INT_REG_READ(S3C2410X_INTSUBMSK,tempUINT32);		
		switch((int)(pChan->regs))
		{		
		case SERIAL_B_BASE_ADR:
			tempUINT32 |= ((1<<SUBINT_LVL_RXD1)|(1<<SUBINT_LVL_TXD1));
			break;
		case SERIAL_A_BASE_ADR:
		default:
			tempUINT32 |= ((1<<SUBINT_LVL_RXD0)|(1<<SUBINT_LVL_TXD0));
			
		}
		s3c2410x_INT_REG_WRITE(S3C2410X_INTSUBMSK,tempUINT32);
    }
    
    return (OK);
}


/*******************************************************************************
*
* s3c2410xHup - hang up the modem control lines 
*
* Resets the RTS and DTR signals.
*
* RETURNS: OK
*/

LOCAL STATUS s3c2410xHup
    (
    S3C2410X_CHAN * pChan     /* pointer to channel */
    )
    {
    FAST int     oldlevel;    /* current interrupt level mask */

    oldlevel = intLock ();

    intUnlock (oldlevel);

    return (OK);

    }    

/*******************************************************************************
*
* s3c2410xOpen - Set the modem control lines 
*
* Set the modem control lines(RTS, DTR) TRUE if not already set.  
*
* RETURNS: OK
*/

LOCAL STATUS s3c2410xOpen
    (
    S3C2410X_CHAN * pChan     /* pointer to channel */
    )
    {
    FAST int     oldlevel;    /* current interrupt level mask */

    oldlevel = intLock ();

    intUnlock (oldlevel);

    return (OK);
    }

/******************************************************************************
*
* s3c2410xOptSet - set hardware options
*
* This routine sets up the hardware according to the specified option
* argument.  If the hardware cannot support a particular option value, then
* it should ignore that portion of the request.
*
* RETURNS: OK upon success, or EIO for invalid arguments.
*/

LOCAL int s3c2410xOptSet
    (
    S3C2410X_CHAN * pChan,        /* channel */
    uint_t    newOpts              /* new options */
    )
    {
        
    UINT8 dataBits = 0x03;
    UINT8 stopBits = 0x00;
    BOOL hdweFlowCtrl=TRUE;
    BOOL rcvrEnable = TRUE;
    int  lvl;
    UINT8 temp=PARITY_NONE;
    UINT32 result;    

    if (pChan == NULL || newOpts & 0xffffff00)
    return EIO;

    /* do nothing if options already set */

    if (pChan->options == newOpts)
    return OK;


    switch (newOpts & CSIZE)
    {
    case CS5:
        dataBits = 0x00; break;
    case CS6:
        dataBits = 0x01; break;
    case CS7:
        dataBits = 0x02; break;
	case CS8:
    default:    
        dataBits = 0x03; break;
    }

    if (newOpts & STOPB)
        stopBits = 0x04;
    else
        stopBits = 0x00;

    switch (newOpts & (PARENB|PARODD))
    {
    case PARENB|PARODD:
            temp=PARITY_ODD;
        break;

    case PARENB:
        temp=PARITY_EVEN; 
        break;

    case PARODD:
        break;

    default:
    case 0:
        temp=PARITY_NONE ;/* no parity */
        break;
    }

    if (newOpts & CLOCAL)
    {
        hdweFlowCtrl = FALSE;
    }

    if ((newOpts & CREAD) == 0)
        rcvrEnable = FALSE;


    lvl = intLock ();

    
    S3C2410X_SIO_REG_READ(pChan, S3C2410X_ULCON, result);    
    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_ULCON,(result|dataBits|temp|stopBits));
    
    intUnlock (lvl);

    pChan->options = newOpts;

    return (OK);
    }

/*******************************************************************************
*
* s3c2410xIoctl - special device control
*
*
* RETURNS: OK on success, ENOSYS on unsupported request, EIO on failed
* request.
*/

LOCAL int s3c2410xIoctl
    (
    SIO_CHAN *    pSioChan,        /* device to control */
    int        request,        /* request code */
    void *    someArg            /* some argument */
    )
    {
    S3C2410X_CHAN *pChan = (S3C2410X_CHAN *) pSioChan;
    int     oldlevel;        /* current interrupt level mask */
    int     arg = (int)someArg;

 
    switch (request)
    {
    case SIO_BAUD_SET:
      

        if (arg == 0)
        return s3c2410xHup (pChan);

        

        if (arg < S3C2410X_BAUD_MIN || arg > S3C2410X_BAUD_MAX)
        {
        	return (EIO);
        }

            switch(arg)
                {
                case 1200:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_1200|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 2400:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_2400|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 4800:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_4800|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 9600:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_9600|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 19200:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_19200|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 38400:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_38400|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 57600:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_57600|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 115200:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_115200|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 230400:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_230400|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);

                case 460800:
                    oldlevel = intLock ();
                    S3C2410X_SIO_REG_WRITE(pChan,S3C2410X_UBRDIV,S3C2410X_CNT0_460800|S3C2410X_CNT1_VAL);
                    intUnlock (oldlevel);
                    pChan->baudRate=arg;
                    return (OK);
          
                default:
                    return(EIO);

                }
            break;

    case SIO_BAUD_GET:

            *(int *)arg = pChan->baudRate;
            break;

    case SIO_MODE_SET:


        return (s3c2410xModeSet (pChan, arg));

    case SIO_MODE_GET:
            

        *(int *)arg = pChan->mode;
        return (OK);

    case SIO_AVAIL_MODES_GET:


        *(int *)arg = SIO_MODE_INT | SIO_MODE_POLL; 
        return (OK);

    case SIO_HW_OPTS_SET:


        return (s3c2410xOptSet (pChan, arg));

    case SIO_HW_OPTS_GET:


        *(int *)arg = pChan->options;
        return (OK);

    case SIO_HUP:


            if (pChan->options & HUPCL) 
                return (s3c2410xHup (pChan));
            return (OK);

    case SIO_OPEN:
            return (s3c2410xOpen (pChan)); 

    default:
        return (ENOSYS);
    }
    return (ENOSYS);
    }

/*******************************************************************************
*
* dummyCallback - dummy callback routine
*
* RETURNS: ERROR.
*/

LOCAL STATUS dummyCallback (void)
    {
    return (ERROR);
    }