sysserial.c

WINDRIVER SBC7410 BSP

/* sysSerial.c - BSP serial device initialization */

/* Copyright 1984-2002 Wind River Systems, Inc. */

/*
modification history
--------------------
01d,21apr02,gtf  Modified for sbc7410 bsp.
01c,09nov01,g_h  Remove include "wrPpmc74xx.h"
01b,23oct01,g_h  Cleaning for T2.2  
01a,17nov98,est  adopted from sysSerial Template 
*/

#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "drv/sio/ns16552Sio.h"
#include "sysGt64260IntrCtl.h"

/* defines */

#define UART_REG(reg,chan) \
		(devParas[chan].baseAdrs + (reg*devParas[chan].regSpace))

/* typedefs */

/* device initialization structure */

typedef struct 
    {
    USHORT vector;      /* Interrupt vector */
    ULONG  baseAdrs;        /* Register base address */
    USHORT regSpace;        /* Address Interval */
    USHORT intLevel;        /* Interrupt level */
    } NS16550_CHAN_PARAS;

/* locals */

/* Local data structures */

LOCAL NS16550_CHAN  ns16550Chan[N_UART_CHANNELS];

LOCAL NS16550_CHAN_PARAS devParas[] = {
    { COM1_INT_VEC, COM1_BASE_ADR, UART_REG_ADDR_INTERVAL, COM1_INT_LVL}
};


/***************************************************************************
*
* 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;
    UINT32 temp ;

    for ( i = 0; i < N_UART_CHANNELS; i++ )
        {
        sysGt64260MuxedIntDisable(GPP_INT_TYPE, 4); /* pin 4 */

        ns16550Chan[i].regs     = (UINT8*)devParas[i].baseAdrs;
        ns16550Chan[i].level    = devParas[i].vector;
        ns16550Chan[i].ier      = 0;
        ns16550Chan[i].lcr      = 0;
        ns16550Chan[i].pad1     = 0;
        ns16550Chan[i].channelMode  = 0;
        ns16550Chan[i].regDelta     = devParas[i].regSpace;
        ns16550Chan[i].baudRate     = CONSOLE_BAUD_RATE;
        ns16550Chan[i].xtal         = UART_XTAL_FREQ;

        ns16550DevInit (&ns16550Chan[i]);

        /* setup modem control lines */
        *((UINT8*)UART_REG(MCR,i)) = (UINT8)0x8 ;
        EIEIO;
        }

    /* NOTE: only 1 UART channel on wrSbc7410. */

    /* setup mpp4/gpp4 register for uart int */
    GT64260_REG_RD(MPP_CTRL0, &temp); /* GPP[4] */
    temp &= ~0x000f0000 ;
    GT64260_REG_WR(MPP_CTRL0, temp);

    /* setup gpp port */
    GT64260_REG_RD(GPP_INT_MASK, &temp); /* pin 4, int masked */
    temp &= ~0x00000010 ;
    GT64260_REG_WR(GPP_INT_MASK, temp);

    GT64260_REG_RD(GPP_INT_CAUSE, &temp); /* pin 4, int cleared */
    temp &= ~0x00000010 ;
    GT64260_REG_WR(GPP_INT_CAUSE, temp);

    GT64260_REG_RD(GPP_IO_CTRL, &temp); /* pin 4, input */
    temp &= ~0x00000010 ;
    GT64260_REG_WR(GPP_IO_CTRL, temp);

    GT64260_REG_RD(GPP_LVL_CTRL, &temp); /* pin 4, active high per schematic */
    temp &= ~0x00000010 ;
    GT64260_REG_WR(GPP_LVL_CTRL, temp);

    return;
    }


/***************************************************************************
*
* 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
*
* SEE ALSO: sysHwInit2()
*/

void sysSerialHwInit2 
    (
    void
    )
    {
    int i;

    /* connect serial interrupts */
    for ( i = 0; i < N_UART_CHANNELS; i++ )
        {
        if ( ns16550Chan[i].level )
            {
            intConnect (INUM_TO_IVEC ((int ) ns16550Chan[i].level),
                        ns16550Int, (int)&ns16550Chan[i] );

            sysGt64260MuxedIntEnable(GPP_INT_TYPE, 4); /* pin 4 */
            }
        }
    return;
    }

/******************************************************************************
*
* sysSerialHwReset - reset the serial controllers
*
* Shutdown all controllers capable of generating interrupts, especially
* controllers using DMA to transfer channel command blocks.  Most Bug
* monitors presume that a hardware reset precedes entry to the monitor
* code.
*
* RETURNS: N/A.
*/

void sysSerialHwReset 
    (
    void 
    )
    {
    int i;

    for ( i = 0; i < N_UART_CHANNELS; i++ )
        ns16550DevInit (&ns16550Chan[i]);
    return;
    }

/******************************************************************************
*
* 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
    )
    {
    if ( (channel < 0) || (channel >= NELEMENTS(ns16550Chan)) )
        return((SIO_CHAN *)ERROR);
    return((SIO_CHAN *) &ns16550Chan[channel]);
    }