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/* $Id: auxio.h,v 1.1 2005-12-20 11:32:11 jcastillo Exp $

 * auxio.h:  Definitions and code for the Auxiliary I/O register.

 *

 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)

 */

#ifndef _SPARC_AUXIO_H

#define _SPARC_AUXIO_H

#include <asm/system.h>

#include <asm/vaddrs.h>

extern unsigned char *auxio_register;

/* This register is an unsigned char in IO space.  It does two things.

 * First, it is used to control the front panel LED light on machines

 * that have it (good for testing entry points to trap handlers and irq's)

 * Secondly, it controls various floppy drive parameters.

 */

#define AUXIO_ORMEIN      0xf0    /* All writes must set these bits. */

#define AUXIO_ORMEIN4M    0xc0    /* sun4m - All writes must set these bits. */

#define AUXIO_FLPY_DENS   0x20    /* Floppy density, high if set. Read only. */

#define AUXIO_FLPY_DCHG   0x10    /* A disk change occurred.  Read only. */

#define AUXIO_EDGE_ON     0x10    /* sun4m - On means Jumper block is in. */

#define AUXIO_FLPY_DSEL   0x08    /* Drive select/start-motor. Write only. */

/* Set the following to one, then zero, after doing a pseudo DMA transfer. */

#define AUXIO_FLPY_TCNT   0x04    /* Floppy terminal count. Write only. */

/* Set the following to zero to eject the floppy. */

#define AUXIO_FLPY_EJCT   0x02    /* Eject floppy disk.  Write only. */

#define AUXIO_LED         0x01    /* On if set, off if unset. Read/Write */

#define AUXREG   ((volatile unsigned char *)(auxio_register))

#define TURN_ON_LED   *AUXREG = (*AUXREG | AUXIO_ORMEIN | AUXIO_LED)

#define TURN_OFF_LED  *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_LED))

#define FLIP_LED      *AUXREG = ((*AUXREG | AUXIO_ORMEIN) ^ AUXIO_LED)

#define FLPY_MOTORON  *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_DSEL)

#define FLPY_MOTOROFF *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_FLPY_DSEL))

#define FLPY_TCNTON   *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_TCNT)

#define FLPY_TCNTOFF  *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_FLPY_TCNT))

#ifndef __ASSEMBLY__

extern inline void set_auxio(unsigned char bits_on, unsigned char bits_off)

{

        unsigned char regval;

        unsigned long flags;

        save_flags(flags); cli();

        switch(sparc_cpu_model) {

        case sun4c:

                regval = *AUXREG;

                *AUXREG = ((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN;

                break;

        case sun4m:

                regval = *AUXREG;

                *AUXREG = ((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN4M;

                break;

        default:

                panic("Can't set AUXIO register on this machine.");

        };

        restore_flags(flags);

}

#endif /* !(__ASSEMBLY__) */

#endif /* !(_SPARC_AUXIO_H) */