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/*  scv64.c

 *

 *  This set of routines control the scv64 chip on the DMV177 board.

 *

 *

 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994, 1997.

 *  On-Line Applications Research Corporation (OAR).

 *  All rights assigned to U.S. Government, 1994.

 *

 *  $Id: scv64.c,v 1.2 2001-09-27 12:00:33 chris Exp $

 */

#include <rtems.h>

#include <bsp.h>

typedef struct {

  /* DARF Registers */

  volatile rtems_unsigned32  DMALAR;             /* 0x00 */

  volatile rtems_unsigned32  DMAVAR;             /* 0x04 */

  volatile rtems_unsigned32  DMATC;              /* 0x08 */

  volatile rtems_unsigned32  DCSR;               /* 0x0c */

  volatile rtems_unsigned32  VMEBAR;             /* 0x10 */

  volatile rtems_unsigned32  RXDATA;             /* 0x14 */

  volatile rtems_unsigned32  RXADDR;             /* 0x18 */

  volatile rtems_unsigned32  RXCTL;              /* 0x1c */

  volatile rtems_unsigned32  BUSSEL;             /* 0x20 */

  volatile rtems_unsigned32  IVECT;              /* 0x24 */

  volatile rtems_unsigned32  APBR;               /* 0x28 */

  volatile rtems_unsigned32  TXDATA;             /* 0x2c */

  volatile rtems_unsigned32  TXADDR;             /* 0x30 */

  volatile rtems_unsigned32  TXCTL;              /* 0x34 */

  volatile rtems_unsigned32  LMFIFO;             /* 0x38 */

  volatile rtems_unsigned32  MODE;               /* 0x3c */

  volatile rtems_unsigned32  SA64BAR;            /* 0x40 */

  volatile rtems_unsigned32  MA64BAR;            /* 0x44 */

  volatile rtems_unsigned32  LAG;                /* 0x48 */

  volatile rtems_unsigned32  DMAVTC;             /* 0x4c */

  /* Reserved */

  volatile rtems_unsigned32  reserved_50_7F[12];

  /* ACC Registers */

  volatile rtems_unsigned8   STAT0_pad[3];       /* 0x80 */

  volatile rtems_unsigned8   STAT0;

  volatile rtems_unsigned8   STAT1_pad[3];       /* 0x84 */

  volatile rtems_unsigned8   STAT1;

  volatile rtems_unsigned8   GENCTL_pad[3];      /* 0x88 */

  volatile rtems_unsigned8   GENCTL;

  volatile rtems_unsigned8   VINT_pad[3];        /* 0x8c */

  volatile rtems_unsigned8   VINT;

  volatile rtems_unsigned8   VREQ_pad[3];        /* 0x90 */

  volatile rtems_unsigned8   VREQ;

  volatile rtems_unsigned8   VARB_pad[3];        /* 0x94 */

  volatile rtems_unsigned8   VARB;

  volatile rtems_unsigned8   ID_pad[3];          /* 0x98 */

  volatile rtems_unsigned8   ID;

  volatile rtems_unsigned8   NA_pad[3];          /* 0x9c */

  volatile rtems_unsigned8   NA;

  volatile rtems_unsigned8   _7IS_pad[3];        /* 0xa0 */

  volatile rtems_unsigned8   _7IS;

  volatile rtems_unsigned8   LIS_pad[3];         /* 0xa4 */

  volatile rtems_unsigned8   LIS;

  volatile rtems_unsigned8   UIE_pad[3];         /* 0xa8 */

  volatile rtems_unsigned8   UIE;

  volatile rtems_unsigned8   LIE_pad[3];         /* 0xac */

  volatile rtems_unsigned8   LIE;

  volatile rtems_unsigned8   VIE_pad[3];         /* 0xb0 */

  volatile rtems_unsigned8   VIE;

  volatile rtems_unsigned8   IC10_pad[3];        /* 0xb4 */

  volatile rtems_unsigned8   IC10;

  volatile rtems_unsigned8   IC32_pad[3];        /* 0xb8 */

  volatile rtems_unsigned8   IC32;

  volatile rtems_unsigned8   IC54_pad[3];        /* 0xbc */

  volatile rtems_unsigned8   IC54;

  /* Utility Registers */

  volatile rtems_unsigned32  MISC;

  volatile rtems_unsigned32  delay_line[3];

  volatile rtems_unsigned32  MBOX0;

  volatile rtems_unsigned32  MBOX1;

  volatile rtems_unsigned32  MBOX2;

  volatile rtems_unsigned32  MBOX3;

} SCV64_Registers;

/*

 * LIE Register

 */

#define LOCAL_INTERRUPT_ENABLE_0  0x01

#define LOCAL_INTERRUPT_ENABLE_1  0x02

#define LOCAL_INTERRUPT_ENABLE_2  0x04

#define LOCAL_INTERRUPT_ENABLE_3  0x08

#define LOCAL_INTERRUPT_ENABLE_4  0x10

#define LOCAL_INTERRUPT_ENABLE_5  0x20

/*

 * IC54 Register

 */

#define AUTOVECTOR_5  0x80

/*

 * Set the registers pointer to the base address of the SCV64

 */

SCV64_Registers *SCV64 =  (void *)DMV170_SCV64_BASE_ADDRESS;

/*PAGE

 *

 *  SCV64_Initialize

 *

 *  This routine initializes the SCV64.

 */

void SCV64_Initialize() {

  SCV64->LIE = 0;

}

/*PAGE

 *

 *  SCV64_Generate_DUART_Interrupts

 *

 *  This sets the SCV64 to generate duart interrupts for

 *  the DMV177 board.

 */

void SCV64_Generate_DUART_Interrupts() {

  rtems_unsigned8 data;

  /*

   * Set Local Interrupt 5 enable

   */

  data = SCV64->LIE;

  data |= LOCAL_INTERRUPT_ENABLE_5;

  SCV64->LIE = data;

  /*

   * Set Autovector.

   */

  data = SCV64->IC54;

  data |= AUTOVECTOR_5;

  SCV64->IC54 = data;

}

/*PAGE

 *

 *  SCV64_Get_Interrupt

 *

 *  This routine returns the SCV64 status register.

 */

rtems_unsigned32 SCV64_Get_Interrupt()

{

  rtems_unsigned8 data;

  /*

   * Put the LIS data into the lower byte of the result

   */

  data = SCV64->LIS;

  return data;

}

/*PAGE

 *

 * SCV64_Get_Interrupt_Enable

 *

 * This routine returns the interrupt enable mask.

 */

rtems_unsigned32 SCV64_Get_Interrupt_Enable()

{

  /*

   * Return the set of interrupts enabled.

   */

  return SCV64->LIE;

}