i386/linux-2.3.21/include/asm-sparc/auxio.h

   1 /* $Id: auxio.h,v 1.18 1997/11/07 15:01:45 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 _SPARC_AUXIO_H
   7 #define _SPARC_AUXIO_H
   8
   9 #include <asm/system.h>
  10 #include <asm/vaddrs.h>
  11
  12 extern unsigned char *auxio_register;
  13
  14 /* This register is an unsigned char in IO space.  It does two things.
  15  * First, it is used to control the front panel LED light on machines
  16  * that have it (good for testing entry points to trap handlers and irq's)
  17  * Secondly, it controls various floppy drive parameters.
  18  */
  19 #define AUXIO_ORMEIN      0xf0    /* All writes must set these bits. */
  20 #define AUXIO_ORMEIN4M    0xc0    /* sun4m - All writes must set these bits. */
  21 #define AUXIO_FLPY_DENS   0x20    /* Floppy density, high if set. Read only. */
  22 #define AUXIO_FLPY_DCHG   0x10    /* A disk change occurred.  Read only. */
  23 #define AUXIO_EDGE_ON     0x10    /* sun4m - On means Jumper block is in. */
  24 #define AUXIO_FLPY_DSEL   0x08    /* Drive select/start-motor. Write only. */
  25 #define AUXIO_LINK_TEST   0x08    /* sun4m - On means TPE Carrier detect. */
  26
  27 /* Set the following to one, then zero, after doing a pseudo DMA transfer. */
  28 #define AUXIO_FLPY_TCNT   0x04    /* Floppy terminal count. Write only. */
  29
  30 /* Set the following to zero to eject the floppy. */
  31 #define AUXIO_FLPY_EJCT   0x02    /* Eject floppy disk.  Write only. */
  32 #define AUXIO_LED         0x01    /* On if set, off if unset. Read/Write */
  33
  34 #define AUXREG   ((volatile unsigned char *)(auxio_register))
  35
  36 /* These are available on sun4c */
  37 #define TURN_ON_LED   if (AUXREG) *AUXREG = (*AUXREG | AUXIO_ORMEIN | AUXIO_LED)
  38 #define TURN_OFF_LED  if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_LED))
  39 #define FLIP_LED      if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) ^ AUXIO_LED)
  40 #define FLPY_MOTORON  if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_DSEL)
  41 #define FLPY_MOTOROFF if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_FLPY_DSEL))
  42 #define FLPY_TCNTON   if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) | AUXIO_FLPY_TCNT)
  43 #define FLPY_TCNTOFF  if (AUXREG) *AUXREG = ((*AUXREG | AUXIO_ORMEIN) & (~AUXIO_FLPY_TCNT))
  44
  45 #ifndef __ASSEMBLY__
  46 #define set_auxio(bits_on, bits_off) \
  47 do { \
  48         unsigned char regval; \
  49         unsigned long flags; \
  50         save_flags(flags); cli(); \
  51         switch(sparc_cpu_model) { \
  52         case sun4c: \
  53                 regval = *AUXREG; \
  54                 *AUXREG = ((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN; \
  55                 break; \
  56         case sun4m: \
  57                 if(!AUXREG) \
  58                         break;     /* VME chassic sun4m, no auxio. */ \
  59                 regval = *AUXREG; \
  60                 *AUXREG = ((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN4M; \
  61                 break; \
  62         case sun4d: \
  63                 break; \
  64         default: \
  65                 panic("Can't set AUXIO register on this machine."); \
  66         }; \
  67         restore_flags(flags); \
  68 } while(0)
  69 #endif /* !(__ASSEMBLY__) */
  70
  71
  72 /* AUXIO2 (Power Off Control) */
  73 extern __volatile__ unsigned char * auxio_power_register;
  74
  75 #define AUXIO_POWER_DETECT_FAILURE      32
  76 #define AUXIO_POWER_CLEAR_FAILURE       2
  77 #define AUXIO_POWER_OFF                 1
  78
  79
  80 #endif /* !(_SPARC_AUXIO_H) */