LXR linux-bk/include/asm-arm/floppy.h

   1/*
   2 *  linux/include/asm-arm/floppy.h
   3 *
   4 *  Copyright (C) 1996-2000 Russell King
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 *  Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
  11 */
  12#ifndef __ASM_ARM_FLOPPY_H
  13#define __ASM_ARM_FLOPPY_H
  14#if 0
  15#include <asm/arch/floppy.h>
  16#endif
  17
  18#define fd_outb(val,port)                       \
  19        do {                                    \
  20                if ((port) == FD_DOR)           \
  21                        fd_setdor((val));       \
  22                else                            \
  23                        outb((val),(port));     \
  24        } while(0)
  25
  26#define fd_inb(port)            inb((port))
  27#define fd_request_irq()        request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
  28                                        SA_INTERRUPT|SA_SAMPLE_RANDOM,"floppy",NULL)
  29#define fd_free_irq()           free_irq(IRQ_FLOPPYDISK,NULL)
  30#define fd_disable_irq()        disable_irq(IRQ_FLOPPYDISK)
  31#define fd_enable_irq()         enable_irq(IRQ_FLOPPYDISK)
  32
  33#define fd_request_dma()        request_dma(DMA_FLOPPY,"floppy")
  34#define fd_free_dma()           free_dma(DMA_FLOPPY)
  35#define fd_disable_dma()        disable_dma(DMA_FLOPPY)
  36#define fd_enable_dma()         enable_dma(DMA_FLOPPY)
  37#define fd_clear_dma_ff()       clear_dma_ff(DMA_FLOPPY)
  38#define fd_set_dma_mode(mode)   set_dma_mode(DMA_FLOPPY, (mode))
  39#define fd_set_dma_addr(addr)   set_dma_addr(DMA_FLOPPY, virt_to_bus((addr)))
  40#define fd_set_dma_count(len)   set_dma_count(DMA_FLOPPY, (len))
  41#define fd_cacheflush(addr,sz)
  42
  43/* need to clean up dma.h */
  44#define DMA_FLOPPYDISK          DMA_FLOPPY
  45
  46/* Floppy_selects is the list of DOR's to select drive fd
  47 *
  48 * On initialisation, the floppy list is scanned, and the drives allocated
  49 * in the order that they are found.  This is done by seeking the drive
  50 * to a non-zero track, and then restoring it to track 0.  If an error occurs,
  51 * then there is no floppy drive present.       [to be put back in again]
  52 */
  53static unsigned char floppy_selects[2][4] =
  54{
  55        { 0x10, 0x21, 0x23, 0x33 },
  56        { 0x10, 0x21, 0x23, 0x33 }
  57};
  58
  59#define fd_setdor(dor)                                                          \
  60do {                                                                            \
  61        int new_dor = (dor);                                                    \
  62        if (new_dor & 0xf0)                                                     \
  63                new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
  64        else                                                                    \
  65                new_dor &= 0x0c;                                                \
  66        outb(new_dor, FD_DOR);                                                  \
  67} while (0)
  68
  69/*
  70 * Someday, we'll automatically detect which drives are present...
  71 */
  72static inline void fd_scandrives (void)
  73{
  74#if 0
  75        int floppy, drive_count;
  76
  77        fd_disable_irq();
  78        raw_cmd = &default_raw_cmd;
  79        raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
  80        raw_cmd->track = 0;
  81        raw_cmd->rate = ?;
  82        drive_count = 0;
  83        for (floppy = 0; floppy < 4; floppy ++) {
  84                current_drive = drive_count;
  85                /*
  86                 * Turn on floppy motor
  87                 */
  88                if (start_motor(redo_fd_request))
  89                        continue;
  90                /*
  91                 * Set up FDC
  92                 */
  93                fdc_specify();
  94                /*
  95                 * Tell FDC to recalibrate
  96                 */
  97                output_byte(FD_RECALIBRATE);
  98                LAST_OUT(UNIT(floppy));
  99                /* wait for command to complete */
 100                if (!successful) {
 101                        int i;
 102                        for (i = drive_count; i < 3; i--)
 103                                floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
 104                        floppy_selects[fdc][3] = 0;
 105                        floppy -= 1;
 106                } else
 107                        drive_count++;
 108        }
 109#else
 110        floppy_selects[0][0] = 0x10;
 111        floppy_selects[0][1] = 0x21;
 112        floppy_selects[0][2] = 0x23;
 113        floppy_selects[0][3] = 0x33;
 114#endif
 115}
 116
 117#define FDC1 (0x3f0)
 118
 119#define FLOPPY0_TYPE 4
 120#define FLOPPY1_TYPE 4
 121
 122#define N_FDC 1
 123#define N_DRIVE 4
 124
 125#define FLOPPY_MOTOR_MASK 0xf0
 126
 127#define CROSS_64KB(a,s) (0)
 128
 129/*
 130 * This allows people to reverse the order of
 131 * fd0 and fd1, in case their hardware is
 132 * strangely connected (as some RiscPCs
 133 * and A5000s seem to be).
 134 */
 135static void driveswap(int *ints, int dummy, int dummy2)
 136{
 137        floppy_selects[0][0] ^= floppy_selects[0][1];
 138        floppy_selects[0][1] ^= floppy_selects[0][0];
 139        floppy_selects[0][0] ^= floppy_selects[0][1];
 140}
 141
 142#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
 143        
 144#endif
 145