sysserial.c

这是micrel公司宽带路由ARM9芯片的VXWORKS BSP 源代码

/* sysSerial.c - KS8695P demo board serial device initialization */


/*
modification history
--------------------
9/22/2003  Ritter Yeh  created 
*/



#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "ks8695Sio.h"



LOCAL KS8695P_CHAN ks8695pChan[N_KS8695P_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 [] =
    {
    &ks8695pChan[0].sio, /* /tyCo/0 */
    };


/* 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_KS8695P_UART_CHANNELS; i++)
	{
	ks8695pChan[i].regs     = (UINT32 *)UART_0_BASE_ADR;
	ks8695pChan[i].baudRate = CONSOLE_BAUD_RATE;
	ks8695pChan[i].xtal     = KS8695P_SYSCLK;

	ks8695pChan[i].levelRx  = INT_LVL_URS;
	ks8695pChan[i].levelTx  = INT_LVL_UTS;

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

	ks8695pSioDevInit(&ks8695pChan[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_KS8695P_UART_CHANNELS; i++)
	{
	/*
	 * Connect and enable the interrupt.
	 */

	(void) intConnect (INUM_TO_IVEC(INT_LVL_URS),
			   ks8695pSioIntRx, (int) &ks8695pChan[i] );


	(void) intConnect (INUM_TO_IVEC(INT_LVL_UTS),
			   ks8695pSioIntTx, (int) &ks8695pChan[i] );


	(void) intConnect (INUM_TO_IVEC(INT_LVL_ULES),
			   ks8695pSioIntErr, (int) &ks8695pChan[i] );

	intEnable (INT_LVL_URS);
	intEnable (INT_LVL_UTS);
	intEnable (INT_LVL_ULES);


	}
    }

/******************************************************************************
*
* 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_KS8695P_UART_CHANNELS; i++)
	{
	/* disable serial interrupts */

	intDisable (INT_LVL_UTS);
	intDisable (INT_LVL_URS);
	intDisable (INT_LVL_ULES);
	}
    }