arch/arm/include/asm/floppy.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  arch/arm/include/asm/floppy.h
   4  *
   5  *  Copyright (C) 1996-2000 Russell King
   6  *
   7  *  Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
   8  */
   9 #ifndef __ASM_ARM_FLOPPY_H
  10 #define __ASM_ARM_FLOPPY_H
  11 #if 0
  12 #include <mach/floppy.h>
  13 #endif
  14
  15 #define fd_outb(val,port)                       \
  16         do {                                    \
  17                 if ((port) == (u32)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                                             0,"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 static inline int fd_dma_setup(void *data, unsigned int length,
  31                                unsigned int mode, unsigned long addr)
  32 {
  33         set_dma_mode(DMA_FLOPPY, mode);
  34         __set_dma_addr(DMA_FLOPPY, data);
  35         set_dma_count(DMA_FLOPPY, length);
  36         virtual_dma_port = addr;
  37         enable_dma(DMA_FLOPPY);
  38         return 0;
  39 }
  40 #define fd_dma_setup            fd_dma_setup
  41
  42 #define fd_request_dma()        request_dma(DMA_FLOPPY,"floppy")
  43 #define fd_free_dma()           free_dma(DMA_FLOPPY)
  44 #define fd_disable_dma()        disable_dma(DMA_FLOPPY)
  45
  46 /* need to clean up dma.h */
  47 #define DMA_FLOPPYDISK          DMA_FLOPPY
  48
  49 /* Floppy_selects is the list of DOR's to select drive fd
  50  *
  51  * On initialisation, the floppy list is scanned, and the drives allocated
  52  * in the order that they are found.  This is done by seeking the drive
  53  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
  54  * then there is no floppy drive present.       [to be put back in again]
  55  */
  56 static unsigned char floppy_selects[2][4] =
  57 {
  58         { 0x10, 0x21, 0x23, 0x33 },
  59         { 0x10, 0x21, 0x23, 0x33 }
  60 };
  61
  62 #define fd_setdor(dor)                                                          \
  63 do {                                                                            \
  64         int new_dor = (dor);                                                    \
  65         if (new_dor & 0xf0)                                                     \
  66                 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
  67         else                                                                    \
  68                 new_dor &= 0x0c;                                                \
  69         outb(new_dor, FD_DOR);                                                  \
  70 } while (0)
  71
  72 /*
  73  * Someday, we'll automatically detect which drives are present...
  74  */
  75 static inline void fd_scandrives (void)
  76 {
  77 #if 0
  78         int floppy, drive_count;
  79
  80         fd_disable_irq();
  81         raw_cmd = &default_raw_cmd;
  82         raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
  83         raw_cmd->track = 0;
  84         raw_cmd->rate = ?;
  85         drive_count = 0;
  86         for (floppy = 0; floppy < 4; floppy ++) {
  87                 current_drive = drive_count;
  88                 /*
  89                  * Turn on floppy motor
  90                  */
  91                 if (start_motor(redo_fd_request))
  92                         continue;
  93                 /*
  94                  * Set up FDC
  95                  */
  96                 fdc_specify();
  97                 /*
  98                  * Tell FDC to recalibrate
  99                  */
 100                 output_byte(FD_RECALIBRATE);
 101                 LAST_OUT(UNIT(floppy));
 102                 /* wait for command to complete */
 103                 if (!successful) {
 104                         int i;
 105                         for (i = drive_count; i < 3; i--)
 106                                 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
 107                         floppy_selects[fdc][3] = 0;
 108                         floppy -= 1;
 109                 } else
 110                         drive_count++;
 111         }
 112 #else
 113         floppy_selects[0][0] = 0x10;
 114         floppy_selects[0][1] = 0x21;
 115         floppy_selects[0][2] = 0x23;
 116         floppy_selects[0][3] = 0x33;
 117 #endif
 118 }
 119
 120 #define FDC1 (0x3f0)
 121
 122 #define FLOPPY0_TYPE 4
 123 #define FLOPPY1_TYPE 4
 124
 125 #define N_FDC 1
 126 #define N_DRIVE 4
 127
 128 #define CROSS_64KB(a,s) (0)
 129
 130 /*
 131  * This allows people to reverse the order of
 132  * fd0 and fd1, in case their hardware is
 133  * strangely connected (as some RiscPCs
 134  * and A5000s seem to be).
 135  */
 136 static void driveswap(int *ints, int dummy, int dummy2)
 137 {
 138         floppy_selects[0][0] ^= floppy_selects[0][1];
 139         floppy_selects[0][1] ^= floppy_selects[0][0];
 140         floppy_selects[0][0] ^= floppy_selects[0][1];
 141 }
 142
 143 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
 144
 145 #endif