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  */
  53 static unsigned char floppy_selects[2][4] =
  54 {
  55         { 0x10, 0x21, 0x23, 0x33 },
  56         { 0x10, 0x21, 0x23, 0x33 }
  57 };
  58
  59 #define fd_setdor(dor)                                                          \
  60 do {                                                                            \
  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  */
  72 static 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  */
 135 static 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