sysserial.c

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/* sysSerial.c - MagicARM2410 board serial device initialization */


#include "copyright_wrs.h"
#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "s3c2410xSio.c"

/* device initialization structure */
typedef struct
	{
		UINT	vector;
		UINT32*	baseAdrs;
		UINT	intLevel;
	}SYS_s3c2410x_CHAN_PARAS;

/* Local data structures */
LOCAL SYS_s3c2410x_CHAN_PARAS devParas[] =
	{
		{INT_VEC_UART_0, (UINT32 *)UART_0_BASE_ADR, INT_LVL_UART_0},
		{INT_VEC_UART_1, (UINT32 *)UART_1_BASE_ADR, INT_LVL_UART_1}
	};

LOCAL s3c2410x_CHAN s3c2410xChan[N_s3c2410x_UART_CHANNELS];

/*
 * Array of pointers to all serial channels configured in system.
 * See sioChanGet(). It is this array that maps channel pointers
 * to standard device names.  The first entry will become "/tyCo/0",
 * the second "/tyCo/1", and so forth.
 */
SIO_CHAN* sysSioChans [] =
	{
		&s3c2410xChan[0].sio,	/* /tyCo/0 */
		&s3c2410xChan[1].sio	/* /tyCo/1 */
	};


/* forward declarations */

/*
 * sysSerialHwInit - initialize the BSP serial devices to a quiescent state
 *
 * This routine initializes the BSP serial device descriptors and puts the
 * devices in a quiesent state.  It is called from sysHwInit() with
 * interrupts locked.
 *
 * RETURNS: N/A
 *
 * SEE ALSO: sysHwInit()
 */
void sysSerialHwInit (void)
{
	int i;

	for(i = 0; i < N_s3c2410x_UART_CHANNELS; i++)
	{
		s3c2410xChan[i].regs = devParas[i].baseAdrs;
		s3c2410xChan[i].baudRate = CONSOLE_BAUD_RATE;
		s3c2410xChan[i].xtal = UART_XTAL_FREQ;

		s3c2410xChan[i].intLevelRx = devParas[i].intLevel;
		s3c2410xChan[i].intLevelTx = devParas[i].intLevel;

		/*
		 * Initialise driver functions, getTxChar, putRcvChar and channelMode
		 * and initialise UART
		 */

		s3c2410xSioDevInit(&s3c2410xChan[i]);
	}
}

/*
 * sysSerialHwInit2 - connect BSP serial device interrupts
 *
 * This routine connects the BSP serial device interrupts.  It is called from
 * sysHwInit2().  Serial device interrupts could not be connected in
 * sysSerialHwInit() because the kernel memory allocator was not initialized
 * at that point, and intConnect() may call malloc().
 *
 * RETURNS: N/A
 *
 * SEE ALSO: sysHwInit2()
 */
void sysSerialHwInit2 (void)
{
	int i;

	for(i = 0; i < N_s3c2410x_UART_CHANNELS; i++)
	{
		/*
		 * Connect and enable the interrupt.
		 * We would like to check the return value from this and log a message
		 * if it failed. However, logLib has not been initialised yet, so we
		 * cannot log a message, so there's little point in checking it.
		 */
		(void)intConnect(
					INUM_TO_IVEC(devParas[i].vector),
					s3c2410xSioInt,
					(int)&s3c2410xChan[i]
				);
		/*intEnable(devParas[i].intLevel);*/s3c2410xIntLvlEnable(devParas[i].intLevel);
	}	
}

/*
 * sysSerialChanGet - get the SIO_CHAN device associated with a serial channel
 *
 * This routine returns a pointer to the SIO_CHAN device associated with
 * a specified serial channel.  It is called by usrRoot() to obtain
 * pointers when creating the system serial devices '/tyCo/x'.  It is also
 * used by the WDB agent to locate its serial channel.
 *
 * RETURNS: A pointer to the SIO_CHAN structure for the channel, or ERROR
 * if the channel is invalid.
 */
SIO_CHAN* sysSerialChanGet
	(
		int channel         /* serial channel */
	)
{
	if(channel < 0 || channel >= (int)(NELEMENTS(sysSioChans)))
	{
		return (SIO_CHAN*)ERROR;
	}

	return sysSioChans[channel];
}

/*
 * sysSerialReset - reset the sio devices to a quiet state
 *
 * Reset all devices to prevent them from generating interrupts.
 *
 * This is called from sysToMonitor to shutdown the system gracefully before
 * transferring to the boot ROMs.
 *
 * RETURNS: N/A.
 */
void sysSerialReset (void)
{
	int i;

	for(i = 0; i < N_s3c2410x_UART_CHANNELS; i++)
	{
		/* disable serial interrupts */
		intDisable (devParas[i].intLevel);
	}

}