sysserial.c

VXWORKS BSP开发包,初始化 驱动文件

/* sysSerial.c - NS 16550 UART bsp serial device initialization */

/* Copyright 1984-1996 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01c,18jan02,scm  modify uart inclusion definition...
01b,23oct00,jb  Resolving warnings at lines 79 and 83
01a,01aug00,scm written
*/

#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "drv/sio/ns16552Sio.h"

/* local data */

static NS16550_CHAN ns16550Chan[IQ80310_UART_N_UARTS];

/******************************************************************************
*
* 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
*/

void sysSerialHwInit (void)
    {
    /* intialize the chips device descriptors */

     ns16550Chan[0].regs	= (UINT8 *)IQ80310_UART_BASE_UART1;
     ns16550Chan[0].level	= I80312INT_VEC_UART1;
     ns16550Chan[0].regDelta	= IQ80310_UART_REG_DELTA;
     ns16550Chan[0].xtal	= IQ80310_UART_XTAL;
     ns16550Chan[0].baudRate	= UART_DEFAULT_BAUD;

#ifdef SECOND_UART
     ns16550Chan[1].regs	= (UINT8 *)IQ80310_UART_BASE_UART2;
     ns16550Chan[1].level	= I80312INT_VEC_UART2;
     ns16550Chan[1].regDelta	= IQ80310_UART_REG_DELTA;
     ns16550Chan[1].xtal	= IQ80310_UART_XTAL;
     ns16550Chan[1].baudRate	= UART_DEFAULT_BAUD;
#endif

    /* reset the chips */

     ns16550DevInit (&ns16550Chan[0]);
#ifdef SECOND_UART 
     ns16550DevInit (&ns16550Chan[1]);
#endif
    }

/******************************************************************************
*
* 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() calls malloc().
*
* RETURNS: N/A
*/

void sysSerialHwInit2 (void)
    {

    /* now connect the serial device interrupts */

    /* Connect serial interrupts. */
    (void) intConnect ((VOIDFUNCPTR *)((UINT32)ns16550Chan[0].level),
                       (VOIDFUNCPTR) ns16550Int, (int)&ns16550Chan[0]);
#ifdef SECOND_UART
    (void) intConnect ((VOIDFUNCPTR *)((UINT32)ns16550Chan[1].level),
                       (VOIDFUNCPTR) ns16550Int, (int)&ns16550Chan[1]);
#endif

    /* Enable the UART interrupt */

    intEnable (ns16550Chan[0].level);
#ifdef SECOND_UART
    intEnable (ns16550Chan[1].level);
#endif
    }

/******************************************************************************
*
* sysSerialChanGet - get the SIO_CHAN device associated with a serial channel
*
* This routine gets the SIO_CHAN device associated with a specified 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
    )
    {
    switch (channel)
	{
	case 0:
	    return ((SIO_CHAN *)&ns16550Chan[0]);

#ifdef SECOND_UART
	case 1:
	    return ((SIO_CHAN *)&ns16550Chan[1]);
#endif
	default:
	    return ((SIO_CHAN *)ERROR);
	}
    }

/******************************************************************************
*
* 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 control to the boot ROM.
*
* RETURNS: N/A.
*/

void sysSerialReset (void)
    {
    /* Disable the UART interrupt */

    intDisable (ns16550Chan[0].level);
#ifdef SECOND_UART
    intDisable (ns16550Chan[1].level);
#endif
    }