include/asm-sparc64/auxio.h

   1 /* $Id: auxio.h,v 1.1 1997/03/14 21:05:27 jj Exp $
   2  * auxio.h:  Definitions and code for the Auxiliary I/O register.
   3  *
   4  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6 #ifndef _SPARC64_AUXIO_H
   7 #define _SPARC64_AUXIO_H
   8
   9 #include <asm/system.h>
  10
  11 /* FIXME: All of this should be checked for sun4u. It has /sbus/auxio, but
  12    I don't know whether it is the same and don't have a floppy */
  13
  14 extern unsigned char *auxio_register;
  15
  16 /* This register is an unsigned char in IO space.  It does two things.
  17  * First, it is used to control the front panel LED light on machines
  18  * that have it (good for testing entry points to trap handlers and irq's)
  19  * Secondly, it controls various floppy drive parameters.
  20  */
  21 #define AUXIO_ORMEIN      0xf0    /* All writes must set these bits. */
  22 #define AUXIO_ORMEIN4M    0xc0    /* sun4m - All writes must set these bits. */
  23 #define AUXIO_FLPY_DENS   0x20    /* Floppy density, high if set. Read only. */
  24 #define AUXIO_FLPY_DCHG   0x10    /* A disk change occurred.  Read only. */
  25 #define AUXIO_EDGE_ON     0x10    /* sun4m - On means Jumper block is in. */
  26 #define AUXIO_FLPY_DSEL   0x08    /* Drive select/start-motor. Write only. */
  27 #define AUXIO_LINK_TEST   0x08    /* sun4m - On means TPE Carrier detect. */
  28
  29 /* Set the following to one, then zero, after doing a pseudo DMA transfer. */
  30 #define AUXIO_FLPY_TCNT   0x04    /* Floppy terminal count. Write only. */
  31
  32 /* Set the following to zero to eject the floppy. */
  33 #define AUXIO_FLPY_EJCT   0x02    /* Eject floppy disk.  Write only. */
  34 #define AUXIO_LED         0x01    /* On if set, off if unset. Read/Write */
  35
  36 #define AUXREG   ((volatile unsigned char *)(auxio_register))
  37
  38 /* These are available on sun4c */
  39 #define TURN_ON_LED   if (AUXREG) *AUXREG = (*AUXREG | AUXIO_ORMEIN | AUXIO_LED)
  40 #define TURN_OFF_LED  if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_LED))
  41 #define FLIP_LED      if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) ^ AUXIO_LED)
  42 #define FLPY_MOTORON  if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_DSEL)
  43 #define FLPY_MOTOROFF if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_FLPY_DSEL))
  44 #define FLPY_TCNTON   if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_TCNT)
  45 #define FLPY_TCNTOFF  if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_FLPY_TCNT))
  46
  47 #ifndef __ASSEMBLY__
  48 extern __inline__ void set_auxio(unsigned char bits_on, unsigned char bits_off)
  49 {
  50         unsigned char regval;
  51         unsigned long flags;
  52
  53         save_flags(flags); cli();
  54
  55         if(AUXREG) {
  56                 regval = *AUXREG;
  57                 *AUXREG = ((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN4M;
  58         }
  59         restore_flags(flags);
  60 }
  61 #endif /* !(__ASSEMBLY__) */
  62
  63
  64 /* AUXIO2 (Power Off Control) */
  65 extern __volatile__ unsigned char * auxio_power_register;
  66
  67 #define AUXIO_POWER_DETECT_FAILURE      32
  68 #define AUXIO_POWER_CLEAR_FAILURE       2
  69 #define AUXIO_POWER_OFF                 1
  70
  71
  72 #endif /* !(_SPARC_AUXIO_H) */