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/* $Id: auxio.h,v 1.2 1999/09/21 14:39:25 davem Exp $
* auxio.h: Definitions and code for the Auxiliary I/O register.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC64_AUXIO_H
#define _SPARC64_AUXIO_H
#include <asm/system.h>
/* FIXME: All of this should be checked for sun4u. It has /sbus/auxio, but
I don't know whether it is the same and don't have a floppy */
extern unsigned long 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 (auxio_register)
/* These are available on sun4c */
#define TURN_ON_LED \
do { if (AUXREG) \
sbus_writeb(sbus_readb(AUXREG) | \
(AUXIO_ORMEIN | AUXIO_LED), AUXREG); \
} while(0)
#define TURN_OFF_LED \
do { if (AUXREG) \
sbus_writeb((sbus_readb(AUXREG) | \
AUXIO_ORMEIN) & (~AUXIO_LED), \
AUXREG); \
} while(0)
#define FLIP_LED \
do { if (AUXREG) \
sbus_writeb((sbus_readb(AUXREG) | \
AUXIO_ORMEIN) ^ AUXIO_LEN, \
AUXREG); \
} while(0)
#define FLPY_MOTORON \
do { if (AUXREG) \
sbus_writeb(sbus_readb(AUXREG) | \
(AUXIO_ORMEIN | AUXIO_FLPY_DSEL), \
AUXREG); \
} while(0)
#define FLPY_MOTOROFF \
do { if (AUXREG) \
sbus_writeb((sbus_readb(AUXREG) | \
AUXIO_ORMEIN) & (~AUXIO_FLPY_DSEL), \
AUXREG); \
} while(0)
#define FLPY_TCNTON \
do { if (AUXREG) \
sbus_writeb((sbus_readb(AUXREG) | \
AUXIO_ORMEIN) | AUXIO_FLPY_TCNT, \
AUXREG); \
} while(0)
#define FLPY_TCNTOFF \
do { if (AUXREG) \
sbus_writeb((sbus_readb(AUXREG) | \
AUXIO_ORMEIN) & (~AUXIO_FLPY_TCNT), \
AUXREG); \
} while(0)
#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();
if(AUXREG) {
unsigned char newval;
regval = sbus_readb(AUXREG);
newval = regval | bits_on;
newval &= ~bits_off;
newval |= AUXIO_ORMEIN4M;
sbus_writeb(newval, AUXREG);
}
restore_flags(flags);
}
#endif /* !(__ASSEMBLY__) */
/* AUXIO2 (Power Off Control) */
extern __volatile__ unsigned char * auxio_power_register;
#define AUXIO_POWER_DETECT_FAILURE 32
#define AUXIO_POWER_CLEAR_FAILURE 2
#define AUXIO_POWER_OFF 1
#endif /* !(_SPARC_AUXIO_H) */
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