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/* $Id: auxio.h,v 1.14 1996/10/31 06:29:10 davem 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. */
#define AUXIO_LINK_TEST 0x08 /* sun4m - On means TPE Carrier detect. */
/* 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))
/* These are available on sun4c */
#define TURN_ON_LED if (AUXREG) *AUXREG = (*AUXREG | AUXIO_ORMEIN | AUXIO_LED)
#define TURN_OFF_LED if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_LED))
#define FLIP_LED if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) ^ AUXIO_LED)
#define FLPY_MOTORON if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_DSEL)
#define FLPY_MOTOROFF if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_FLPY_DSEL))
#define FLPY_TCNTON if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_TCNT)
#define FLPY_TCNTOFF if (AUXREG) *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) */
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