include/asm-arm26/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
  15 #define fd_outb(val,port)                       \
  16         do {                                    \
  17                 if ((port) == FD_DOR)           \
  18                         fd_setdor((val));       \
  19                 else                            \
  20                         outb((val),(port));     \
  21         } while(0)
  22
  23 #define fd_inb(port)            inb((port))
  24 #define fd_request_irq()        request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
  25                                         SA_INTERRUPT|SA_SAMPLE_RANDOM,"floppy",NULL)
  26 #define fd_free_irq()           free_irq(IRQ_FLOPPYDISK,NULL)
  27 #define fd_disable_irq()        disable_irq(IRQ_FLOPPYDISK)
  28 #define fd_enable_irq()         enable_irq(IRQ_FLOPPYDISK)
  29
  30 #define fd_request_dma()        request_dma(DMA_FLOPPY,"floppy")
  31 #define fd_free_dma()           free_dma(DMA_FLOPPY)
  32 #define fd_disable_dma()        disable_dma(DMA_FLOPPY)
  33 #define fd_enable_dma()         enable_dma(DMA_FLOPPY)
  34 #define fd_clear_dma_ff()       clear_dma_ff(DMA_FLOPPY)
  35 #define fd_set_dma_mode(mode)   set_dma_mode(DMA_FLOPPY, (mode))
  36 #define fd_set_dma_addr(addr)   set_dma_addr(DMA_FLOPPY, virt_to_bus((addr)))
  37 #define fd_set_dma_count(len)   set_dma_count(DMA_FLOPPY, (len))
  38 #define fd_cacheflush(addr,sz)
  39
  40 /* need to clean up dma.h */
  41 #define DMA_FLOPPYDISK          DMA_FLOPPY
  42
  43 /* Floppy_selects is the list of DOR's to select drive fd
  44  *
  45  * On initialisation, the floppy list is scanned, and the drives allocated
  46  * in the order that they are found.  This is done by seeking the drive
  47  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
  48  * then there is no floppy drive present.       [to be put back in again]
  49  */
  50 static unsigned char floppy_selects[2][4] =
  51 {
  52         { 0x10, 0x21, 0x23, 0x33 },
  53         { 0x10, 0x21, 0x23, 0x33 }
  54 };
  55
  56 #define fd_setdor(dor)                                                          \
  57 do {                                                                            \
  58         int new_dor = (dor);                                                    \
  59         if (new_dor & 0xf0)                                                     \
  60                 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
  61         else                                                                    \
  62                 new_dor &= 0x0c;                                                \
  63         outb(new_dor, FD_DOR);                                                  \
  64 } while (0)
  65
  66 /*
  67  * Someday, we'll automatically detect which drives are present...
  68  */
  69 static inline void fd_scandrives (void)
  70 {
  71 #if 0
  72         int floppy, drive_count;
  73
  74         fd_disable_irq();
  75         raw_cmd = &default_raw_cmd;
  76         raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
  77         raw_cmd->track = 0;
  78         raw_cmd->rate = ?;
  79         drive_count = 0;
  80         for (floppy = 0; floppy < 4; floppy ++) {
  81                 current_drive = drive_count;
  82                 /*
  83                  * Turn on floppy motor
  84                  */
  85                 if (start_motor(redo_fd_request))
  86                         continue;
  87                 /*
  88                  * Set up FDC
  89                  */
  90                 fdc_specify();
  91                 /*
  92                  * Tell FDC to recalibrate
  93                  */
  94                 output_byte(FD_RECALIBRATE);
  95                 LAST_OUT(UNIT(floppy));
  96                 /* wait for command to complete */
  97                 if (!successful) {
  98                         int i;
  99                         for (i = drive_count; i < 3; i--)
 100                                 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
 101                         floppy_selects[fdc][3] = 0;
 102                         floppy -= 1;
 103                 } else
 104                         drive_count++;
 105         }
 106 #else
 107         floppy_selects[0][0] = 0x10;
 108         floppy_selects[0][1] = 0x21;
 109         floppy_selects[0][2] = 0x23;
 110         floppy_selects[0][3] = 0x33;
 111 #endif
 112 }
 113
 114 #define FDC1 (0x3f0)
 115
 116 #define FLOPPY0_TYPE 4
 117 #define FLOPPY1_TYPE 4
 118
 119 #define N_FDC 1
 120 #define N_DRIVE 4
 121
 122 #define FLOPPY_MOTOR_MASK 0xf0
 123
 124 #define CROSS_64KB(a,s) (0)
 125
 126 /*
 127  * This allows people to reverse the order of
 128  * fd0 and fd1, in case their hardware is
 129  * strangely connected (as some RiscPCs
 130  * and A5000s seem to be).
 131  */
 132 static void driveswap(int *ints, int dummy, int dummy2)
 133 {
 134         floppy_selects[0][0] ^= floppy_selects[0][1];
 135         floppy_selects[0][1] ^= floppy_selects[0][0];
 136         floppy_selects[0][0] ^= floppy_selects[0][1];
 137 }
 138
 139 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
 140
 141 #endif