Subversion Repositories or1k

/*

 *  This file contains the hardware specific portions of the TTY driver

 *  for the serial ports on the jmr3904.

 *

 *  Logic based on the jmr3904-io.c file in newlib 1.8.2

 *

 *  COPYRIGHT (c) 1989-2000.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  console-io.c,v 1.6 2002/01/04 17:40:47 joel Exp

 */

#include <bsp.h>

#include <rtems/libio.h>

#include <stdlib.h>

#include <assert.h>

/* external prototypes for monitor interface routines */

#define READ_UINT8( _register_, _value_ ) \

        ((_value_) = *((volatile unsigned char *)(_register_)))

#define WRITE_UINT8( _register_, _value_ ) \

        (*((volatile unsigned char *)(_register_)) = (_value_))

#define READ_UINT16( _register_, _value_ ) \

     ((_value_) = *((volatile unsigned short *)(_register_)))

#define WRITE_UINT16( _register_, _value_ ) \

     (*((volatile unsigned short *)(_register_)) = (_value_))

 /* - Board specific addresses for serial chip */

#define DIAG_BASE       0xfffff300

#define DIAG_SLCR       (DIAG_BASE+0x00)

#define DIAG_SLSR       (DIAG_BASE+0x04)

#define DIAG_SLDICR     (DIAG_BASE+0x08)

#define DIAG_SLDISR     (DIAG_BASE+0x0C)

#define DIAG_SFCR       (DIAG_BASE+0x10)

#define DIAG_SBRG       (DIAG_BASE+0x14)

#define DIAG_TFIFO      (DIAG_BASE+0x20)

#define DIAG_RFIFO      (DIAG_BASE+0x30)

#define BRG_T0          0x0000

#define BRG_T2          0x0100

#define BRG_T4          0x0200

#define BRG_T5          0x0300

/*

 *  Eventually console-polled.c should hook to this better.

 */

/*

 *  console_initialize_hardware

 *

 *  This routine initializes the console hardware.

 *

 */

void console_initialize_hardware(void)

{

  WRITE_UINT16 (DIAG_SLCR, 0x0020);

  WRITE_UINT16 (DIAG_SLDICR, 0x0000);

  WRITE_UINT16 (DIAG_SFCR, 0x0000);

  WRITE_UINT16 (DIAG_SBRG, BRG_T2 | 5);

}

/*

 *  console_outbyte_polled

 *

 *  This routine transmits a character using polling.

 */

void console_outbyte_polled(

  int  port,

  char ch

)

{

  unsigned short disr;

  for (;;) {

    READ_UINT16 (DIAG_SLDISR, disr);

    if (disr & 0x0002)

      break;

  }

  disr = disr & ~0x0002;

  WRITE_UINT8 (DIAG_TFIFO, (unsigned char) ch);

  WRITE_UINT16 (DIAG_SLDISR, disr);

}

/*

 *  console_inbyte_nonblocking

 *

 *  This routine polls for a character.

 */

int console_inbyte_nonblocking(

  int port

)

{

  unsigned char c;

  unsigned short disr;

  READ_UINT16 (DIAG_SLDISR, disr);

  if (disr & 0x0001) {

    disr = disr & ~0x0001;

    READ_UINT8 (DIAG_RFIFO, c);

    WRITE_UINT16 (DIAG_SLDISR, disr);

    return (char) c;

  }

  return -1;

}

#include <rtems/bspIo.h>

void JMR3904_output_char(char c) { console_outbyte_polled( 0, c ); }

BSP_output_char_function_type           BSP_output_char = JMR3904_output_char;

BSP_polling_getchar_function_type       BSP_poll_char = NULL;