sysserial.c

VxWorks BSP 下s3C44b0的源代码

/* sysSerial.c - Samsung SBC ARM7 serial device initialization */

/* Copyright 1984-2001 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01c,10jul01,g_h  add #include "sngks32cSio.c" instead of the makefile
01b,26apr01,m_h  convert tabs to spaces for readability
01a,12apr01,m_h  created from snds100 template.
*/

/*
DESCRIPTION
This file contains the board-specific routines for serial channel
initialization of the Samsung SBC ARM7 development board.

INCLUDES:
sngks32cSio.h

SEE ALSO:
<Samsung KS32C50100 Microcontroller User's Manual>
*/


#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "sngks32cSio.h"

#include "wrSbcArm7.h"

#include "sngks32cSio.c"

/* device initialization structure */

typedef struct
    {
    UINT  vectorRx;
    UINT  vectorTx;
    UINT32 *baseAdrs;
    UINT  regSpace;
    UINT  intLevelRx;
    UINT  intLevelTx;
    } SBCARM7_CHAN_PARAS;


/* Local data structures */

LOCAL SBCARM7_CHAN_PARAS devParas[] =
    {
      {INT_VEC_UARTRX0, INT_VEC_UARTTX0, (UINT32 *)SERIAL_A_BASE_ADR, UART_REG_ADDR_INTERVAL,
       INT_LVL_UARTRX0, INT_LVL_UARTTX0},
      {INT_VEC_UARTRX1, INT_VEC_UARTTX1, (UINT32 *)SERIAL_B_BASE_ADR, UART_REG_ADDR_INTERVAL,
      INT_LVL_UARTRX1, INT_LVL_UARTTX1}
    };
 
LOCAL SNGKS32C_CHAN sngks32cChan[N_SBCARM7_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 [] =
    {
    &sngks32cChan[0].sio, /* /tyCo/0 */
    &sngks32cChan[1].sio, /* /tyCo/1 */
    };


/* forward declarations */

/******************************************************************************
*
* sysSerialHwInit - initialize the BSP serial devices to a quiesent 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_SBCARM7_UART_CHANNELS; i++)
        {
        sngks32cChan[i].regDelta = devParas[i].regSpace;
        sngks32cChan[i].regs = devParas[i].baseAdrs;
        sngks32cChan[i].baudRate = CONSOLE_BAUD_RATE;
        sngks32cChan[i].intLevelRx = devParas[i].intLevelRx;
        sngks32cChan[i].intLevelTx = devParas[i].intLevelTx;

        /*
         * Initialize driver functions, getTxChar, putRcvChar and channelMode
         * and initialize UART
         */

        sngks32cDevInit(&sngks32cChan[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_SBCARM7_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 initialized yet, so we
         * cannot log a message, so there's little point in checking it.
         */

        (void) intConnect (INUM_TO_IVEC(devParas[i].vectorTx),
                           sngks32cIntTx, (int) &sngks32cChan[i] );
        (void) intConnect (INUM_TO_IVEC(devParas[i].vectorRx),
                           sngks32cIntRcv, (int) &sngks32cChan[i] );

        intEnable (devParas[i].intLevelRx);
        sngks32cDevInit2(&sngks32cChan[i]);
        }
    }

/******************************************************************************
*
* 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 bootroms.
*
* RETURNS: N/A.
*/

void sysSerialReset (void)
    {
    int i;

    for (i = 0; i < N_SBCARM7_UART_CHANNELS; i++)
        {
        /* disable serial interrupts */

        intDisable (devParas[i].intLevelTx);
        intDisable (devParas[i].intLevelRx);
        }
    }