arch/arm/include/asm/floppy.h

   1 /*
   2  *  arch/arm/include/asm/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 <mach/floppy.h>
  16 #endif
  17
  18 #define fd_outb(val,port)                       \
  19         do {                                    \
  20                 if ((port) == (u32)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                                             0,"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 static inline int fd_dma_setup(void *data, unsigned int length,
  34                                unsigned int mode, unsigned long addr)
  35 {
  36         set_dma_mode(DMA_FLOPPY, mode);
  37         __set_dma_addr(DMA_FLOPPY, data);
  38         set_dma_count(DMA_FLOPPY, length);
  39         virtual_dma_port = addr;
  40         enable_dma(DMA_FLOPPY);
  41         return 0;
  42 }
  43 #define fd_dma_setup            fd_dma_setup
  44
  45 #define fd_request_dma()        request_dma(DMA_FLOPPY,"floppy")
  46 #define fd_free_dma()           free_dma(DMA_FLOPPY)
  47 #define fd_disable_dma()        disable_dma(DMA_FLOPPY)
  48
  49 /* need to clean up dma.h */
  50 #define DMA_FLOPPYDISK          DMA_FLOPPY
  51
  52 /* Floppy_selects is the list of DOR's to select drive fd
  53  *
  54  * On initialisation, the floppy list is scanned, and the drives allocated
  55  * in the order that they are found.  This is done by seeking the drive
  56  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
  57  * then there is no floppy drive present.       [to be put back in again]
  58  */
  59 static unsigned char floppy_selects[2][4] =
  60 {
  61         { 0x10, 0x21, 0x23, 0x33 },
  62         { 0x10, 0x21, 0x23, 0x33 }
  63 };
  64
  65 #define fd_setdor(dor)                                                          \
  66 do {                                                                            \
  67         int new_dor = (dor);                                                    \
  68         if (new_dor & 0xf0)                                                     \
  69                 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
  70         else                                                                    \
  71                 new_dor &= 0x0c;                                                \
  72         outb(new_dor, FD_DOR);                                                  \
  73 } while (0)
  74
  75 /*
  76  * Someday, we'll automatically detect which drives are present...
  77  */
  78 static inline void fd_scandrives (void)
  79 {
  80 #if 0
  81         int floppy, drive_count;
  82
  83         fd_disable_irq();
  84         raw_cmd = &default_raw_cmd;
  85         raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
  86         raw_cmd->track = 0;
  87         raw_cmd->rate = ?;
  88         drive_count = 0;
  89         for (floppy = 0; floppy < 4; floppy ++) {
  90                 current_drive = drive_count;
  91                 /*
  92                  * Turn on floppy motor
  93                  */
  94                 if (start_motor(redo_fd_request))
  95                         continue;
  96                 /*
  97                  * Set up FDC
  98                  */
  99                 fdc_specify();
 100                 /*
 101                  * Tell FDC to recalibrate
 102                  */
 103                 output_byte(FD_RECALIBRATE);
 104                 LAST_OUT(UNIT(floppy));
 105                 /* wait for command to complete */
 106                 if (!successful) {
 107                         int i;
 108                         for (i = drive_count; i < 3; i--)
 109                                 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
 110                         floppy_selects[fdc][3] = 0;
 111                         floppy -= 1;
 112                 } else
 113                         drive_count++;
 114         }
 115 #else
 116         floppy_selects[0][0] = 0x10;
 117         floppy_selects[0][1] = 0x21;
 118         floppy_selects[0][2] = 0x23;
 119         floppy_selects[0][3] = 0x33;
 120 #endif
 121 }
 122
 123 #define FDC1 (0x3f0)
 124
 125 #define FLOPPY0_TYPE 4
 126 #define FLOPPY1_TYPE 4
 127
 128 #define N_FDC 1
 129 #define N_DRIVE 4
 130
 131 #define CROSS_64KB(a,s) (0)
 132
 133 /*
 134  * This allows people to reverse the order of
 135  * fd0 and fd1, in case their hardware is
 136  * strangely connected (as some RiscPCs
 137  * and A5000s seem to be).
 138  */
 139 static void driveswap(int *ints, int dummy, int dummy2)
 140 {
 141         floppy_selects[0][0] ^= floppy_selects[0][1];
 142         floppy_selects[0][1] ^= floppy_selects[0][0];
 143         floppy_selects[0][0] ^= floppy_selects[0][1];
 144 }
 145
 146 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
 147
 148 #endif