LXR linux/arch/sparc/include/asm/auxio

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * auxio.h:  Definitions and code for the Auxiliary I/O register.
   4 *
   5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   6 */
   7#ifndef _SPARC_AUXIO_H
   8#define _SPARC_AUXIO_H
   9
  10#include <asm/vaddrs.h>
  11
  12/* This register is an unsigned char in IO space.  It does two things.
  13 * First, it is used to control the front panel LED light on machines
  14 * that have it (good for testing entry points to trap handlers and irq's)
  15 * Secondly, it controls various floppy drive parameters.
  16 */
  17#define AUXIO_ORMEIN      0xf0    /* All writes must set these bits. */
  18#define AUXIO_ORMEIN4M    0xc0    /* sun4m - All writes must set these bits. */
  19#define AUXIO_FLPY_DENS   0x20    /* Floppy density, high if set. Read only. */
  20#define AUXIO_FLPY_DCHG   0x10    /* A disk change occurred.  Read only. */
  21#define AUXIO_EDGE_ON     0x10    /* sun4m - On means Jumper block is in. */
  22#define AUXIO_FLPY_DSEL   0x08    /* Drive select/start-motor. Write only. */
  23#define AUXIO_LINK_TEST   0x08    /* sun4m - On means TPE Carrier detect. */
  24
  25/* Set the following to one, then zero, after doing a pseudo DMA transfer. */
  26#define AUXIO_FLPY_TCNT   0x04    /* Floppy terminal count. Write only. */
  27
  28/* Set the following to zero to eject the floppy. */
  29#define AUXIO_FLPY_EJCT   0x02    /* Eject floppy disk.  Write only. */
  30#define AUXIO_LED         0x01    /* On if set, off if unset. Read/Write */
  31
  32#ifndef __ASSEMBLY__
  33
  34/*
  35 * NOTE: these routines are implementation dependent--
  36 * understand the hardware you are querying!
  37 */
  38void set_auxio(unsigned char bits_on, unsigned char bits_off);
  39unsigned char get_auxio(void); /* .../asm/floppy.h */
  40
  41/*
  42 * The following routines are provided for driver-compatibility
  43 * with sparc64 (primarily sunlance.c)
  44 */
  45
  46#define AUXIO_LTE_ON    1
  47#define AUXIO_LTE_OFF   0
  48
  49/* auxio_set_lte - Set Link Test Enable (TPE Link Detect)
  50 *
  51 * on - AUXIO_LTE_ON or AUXIO_LTE_OFF
  52 */
  53#define auxio_set_lte(on) \
  54do { \
  55        if(on) { \
  56                set_auxio(AUXIO_LINK_TEST, 0); \
  57        } else { \
  58                set_auxio(0, AUXIO_LINK_TEST); \
  59        } \
  60} while (0)
  61
  62#define AUXIO_LED_ON    1
  63#define AUXIO_LED_OFF   0
  64
  65/* auxio_set_led - Set system front panel LED
  66 *
  67 * on - AUXIO_LED_ON or AUXIO_LED_OFF
  68 */
  69#define auxio_set_led(on) \
  70do { \
  71        if(on) { \
  72                set_auxio(AUXIO_LED, 0); \
  73        } else { \
  74                set_auxio(0, AUXIO_LED); \
  75        } \
  76} while (0)
  77
  78#endif /* !(__ASSEMBLY__) */
  79
  80
  81/* AUXIO2 (Power Off Control) */
  82extern volatile u8 __iomem *auxio_power_register;
  83
  84#define AUXIO_POWER_DETECT_FAILURE      32
  85#define AUXIO_POWER_CLEAR_FAILURE       2
  86#define AUXIO_POWER_OFF                 1
  87
  88
  89#endif /* !(_SPARC_AUXIO_H) */
  90