sysserial.c

miceteck_MPC860_BSP源码,基于VXWORK

/* sysSerial.c -  MPC860 SMC UART BSP serial device initialization */

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

/*
modification history
--------------------
01d,06nov96,tpr  replaced SYS_CPU_FREQ by BRGCLK_FREQ.
01c,20jun96,tpr  added sysSerialReset().
01b,28may96,dzb  tweaked setting of portB registers.
01a,19apr86,cah  created
*/

#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "drv/sio/ppc860Sio.h"
#include "drv/multi/ppc860Cpm.h"
#include "860pc.h"

static PPC860SMC_CHAN ppc860Chan;
/******************************************************************************
*
* 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.
*
* Data Parameter Ram layout:
*
*          -----------------------------
*          |                           | DPRAM base (address = 0)
*          |                           |
*          |                           |
*          |                           |
*          |---------------------------|
*          | 8 bytes per descriptor    | Tx(SMC) Buffer Descriptor (0x2200)   
*          |---------------------------|
*          |                           |
*          |---------------------------|
*          | 16 descriptors @          | Rx(SMC) Buffer Descriptors (0x2210)
*          | 8 bytes per descriptor    | 
*          |                           |
*          |---------------------------| end Rx(SMC) BDs (0x2290)
*          |                           | 
*          |---------------------------|
*          | 80 bytes allowed          | Tx(SMC) Buffer (0x2300 + DPRAM base address)
*          |---------------------------|
*          | one receive char/buffer   | Rx(SMC) Buffer (0x2380 + DPRAM base address)
*          |---------------------------|
*          |                           |
*          |---------------------------|
*          | 8 bytes per descriptor    | Tx(SCC) Buffer Descriptor (0x2400)   
*          |---------------------------|
*          |                           |
*          |---------------------------|
*          | 16 descriptors @          | Rx(SCC) Buffer Descriptors (0x2410)
*          | 8 bytes per descriptor    | 
*          |                           |
*          |---------------------------| end Rx(SCC) BDs (0x2490)
*          |                           |
*          |---------------------------|
*          | 80 bytes allowed          | Tx(SCC) Buffer (0x2500 + DPRAM base address)
*          |---------------------------|
*          | one receive char/buffer   | Rx(SCC) Buffer (0x2580 + DPRAM base address)
*          |---------------------------|
*          |                           |
*          |---------------------------| 
*          | 128 bytes of parameter    | SCC1 Parameter Area(0x1c00)
*          | info                      |
*          |---------------------------|
*          |                           | 
*          |---------------------------| 
*          | 128 bytes of parameter    | SCC2 Parameter Area(0x1d00)
*          | info                      |
*          |---------------------------|
*          |                           |
*          |---------------------------| 
*          | 128 bytes of parameter    | SCC3 Parameter Area(0x1e00)
*          | info                      |
*          |---------------------------|
*          | 34 bytes of parameter info| SMC1 Parameter Area (0x1e80)
*          | including Rx and Tx BD    | 
*          | pointers, func codes      |
*          | etc...                    |
*          |---------------------------|
*          |                           |
*          |---------------------------| 
*          | 128 bytes of parameter    | SCC4 Parameter Area(0x1f00)
*          | info                      |
*          |---------------------------|
*          |                           |
*
*
* RETURNS: N/A
*/ 

void sysSerialHwInit (void)
    {
    /* enable serial I/O on the board */

    /* XXX here was BSCR setup !!! */
    
    /* intialize the chips device(SMC UART) descriptors */

    ppc860Chan.clockRate      = BRGCLK_FREQ;	    /* BRGCLK freq (Hz) */

    ppc860Chan.regBase        = vxImmrGet();  	    /* IMMR reg has base adr */
    ppc860Chan.bgrNum         = 1;                  /* use BRG1 */
    ppc860Chan.uart.smcNum    = 1;                  /* SMC1 wired for rs232 */
    ppc860Chan.uart.txBdNum   = 1;                  /* use 1 transmit BD */
    ppc860Chan.uart.rxBdNum   = 0x10;               /* use 16 receive BD */
    ppc860Chan.uart.txBdBase  = (SMC_BUF *) 0x2200;  /* transmit BD base adrs */
    ppc860Chan.uart.rxBdBase  = (SMC_BUF *) 0x2210;  /* receive BD base adrs */
    ppc860Chan.uart.txBufBase = (u_char *) 
		(MPC860_DPRAM_BASE(ppc860Chan.regBase) + 0x300);       
                                                    /* tx buf base */
    ppc860Chan.uart.rxBufBase = (u_char *) 
		(MPC860_DPRAM_BASE(ppc860Chan.regBase) + 0x380);
                                                    /* rx buf base */
    ppc860Chan.uart.txBufSize = 0x1;                /* transmit buffer size */
    ppc860Chan.uart.pSmc = (SMC *) ((UINT32) 
	PPC860_DPR_SMC1( MPC860_DPRAM_BASE(ppc860Chan.regBase) ));
                                                    /* DPRAM addr of SMC1 params */
    ppc860Chan.uart.pSmcReg = 
        (SMC_REG *) ((UINT32) MPC860_SMCMR1(ppc860Chan.regBase));
						    /* SMCMR1 for SMC1 */

    ppc860Chan.pBaud = (UINT32 *) MPC860_BRGC1(ppc860Chan.regBase);
    ppc860Chan.channelMode = 0;

    *MPC860_PBPAR(ppc860Chan.regBase) = 0xC0;       /* select RS232 pins */
    *MPC860_SDCR(ppc860Chan.regBase) = 1;           /* */

    /* reset the chip */

    ppc860DevInit(&ppc860Chan);


    }

/******************************************************************************
*
* 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)
    {
    /* connect serial interrupts */

    (void) intConnect (IV_SMC1, (VOIDFUNCPTR) ppc860Int, (int) &ppc860Chan);
    
    *CIMR(vxImmrGet()) |= CIMR_SMC1;  /* limited to SMC1 */
   
    }

/******************************************************************************
*
* 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		/* serial channel */
    )
    {
    if (channel==0)
      return ((SIO_CHAN *) &ppc860Chan);
    else
      return ((SIO_CHAN *) ERROR);
   
    }

/*******************************************************************************
*
* sysSerialReset - reset the serail device 
*
* This function calls sysSerialHwInit() to reset the serail device
*
* RETURNS: N/A
*
*/

void sysSerialReset (void)
    {
    sysSerialHwInit ();
    }