i386/linux-2.3.21/include/asm-arm/floppy.h

   1 /*
   2  * linux/include/asm-arm/floppy.h
   3  *
   4  * (C) 1996 Russell King
   5  */
   6 #ifndef __ASM_ARM_FLOPPY_H
   7 #define __ASM_ARM_FLOPPY_H
   8 #if 0
   9 #include <asm/arch/floppy.h>
  10 #endif
  11
  12 #define fd_outb(val,port)                       \
  13         do {                                    \
  14                 if ((port) == FD_DOR)           \
  15                         fd_setdor((val));       \
  16                 else                            \
  17                         outb((val),(port));     \
  18         } while(0)
  19
  20 #define fd_inb(port)            inb((port))
  21 #define fd_request_irq()        request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
  22                                         SA_INTERRUPT|SA_SAMPLE_RANDOM,"floppy",NULL)
  23 #define fd_free_irq()           free_irq(IRQ_FLOPPYDISK,NULL)
  24 #define fd_disable_irq()        disable_irq(IRQ_FLOPPYDISK)
  25 #define fd_enable_irq()         enable_irq(IRQ_FLOPPYDISK)
  26
  27 #define fd_request_dma()        request_dma(FLOPPY_DMA,"floppy")
  28 #define fd_free_dma()           free_dma(FLOPPY_DMA)
  29 #define fd_disable_dma()        disable_dma(FLOPPY_DMA)
  30 #define fd_enable_dma()         enable_dma(FLOPPY_DMA)
  31 #define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
  32 #define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA, (mode))
  33 #define fd_set_dma_addr(addr)   set_dma_addr(FLOPPY_DMA, virt_to_bus((addr)))
  34 #define fd_set_dma_count(len)   set_dma_count(FLOPPY_DMA, (len))
  35 #define fd_cacheflush(addr,sz)
  36
  37 /* need to clean up dma.h */
  38 #define DMA_FLOPPYDISK          DMA_FLOPPY
  39
  40 /* Floppy_selects is the list of DOR's to select drive fd
  41  *
  42  * On initialisation, the floppy list is scanned, and the drives allocated
  43  * in the order that they are found.  This is done by seeking the drive
  44  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
  45  * then there is no floppy drive present.       [to be put back in again]
  46  */
  47 static unsigned char floppy_selects[2][4] =
  48 {
  49         { 0x10, 0x21, 0x23, 0x33 },
  50         { 0x10, 0x21, 0x23, 0x33 }
  51 };
  52
  53 #define fd_setdor(dor)                                                          \
  54 do {                                                                            \
  55         int new_dor = (dor);                                                    \
  56         if (new_dor & 0xf0)                                                     \
  57                 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
  58         else                                                                    \
  59                 new_dor &= 0x0c;                                                \
  60         outb(new_dor, FD_DOR);                                                  \
  61 } while (0)
  62
  63 /*
  64  * Someday, we'll automatically detect which drives are present...
  65  */
  66 extern __inline__ void fd_scandrives (void)
  67 {
  68 #if 0
  69         int floppy, drive_count;
  70
  71         fd_disable_irq();
  72         raw_cmd = &default_raw_cmd;
  73         raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
  74         raw_cmd->track = 0;
  75         raw_cmd->rate = ?;
  76         drive_count = 0;
  77         for (floppy = 0; floppy < 4; floppy ++) {
  78                 current_drive = drive_count;
  79                 /*
  80                  * Turn on floppy motor
  81                  */
  82                 if (start_motor(redo_fd_request))
  83                         continue;
  84                 /*
  85                  * Set up FDC
  86                  */
  87                 fdc_specify();
  88                 /*
  89                  * Tell FDC to recalibrate
  90                  */
  91                 output_byte(FD_RECALIBRATE);
  92                 LAST_OUT(UNIT(floppy));
  93                 /* wait for command to complete */
  94                 if (!successful) {
  95                         int i;
  96                         for (i = drive_count; i < 3; i--)
  97                                 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
  98                         floppy_selects[fdc][3] = 0;
  99                         floppy -= 1;
 100                 } else
 101                         drive_count++;
 102         }
 103 #else
 104         floppy_selects[0][0] = 0x10;
 105         floppy_selects[0][1] = 0x21;
 106         floppy_selects[0][2] = 0x23;
 107         floppy_selects[0][3] = 0x33;
 108 #endif
 109 }
 110
 111 #define FDC1 (0x3f0)
 112 static int FDC2 = -1;
 113
 114 #define FLOPPY0_TYPE 4
 115 #define FLOPPY1_TYPE 4
 116
 117 #define N_FDC 1
 118 #define N_DRIVE 8
 119
 120 #define FLOPPY_MOTOR_MASK 0xf0
 121
 122 #define CROSS_64KB(a,s) (0)
 123
 124 /*
 125  * This allows people to reverse the order of
 126  * fd0 and fd1, in case their hardware is
 127  * strangely connected (as some RiscPCs
 128  * and A5000s seem to be).
 129  */
 130 static void driveswap(int *ints, int dummy, int dummy2)
 131 {
 132         floppy_selects[0][0] ^= floppy_selects[0][1];
 133         floppy_selects[0][1] ^= floppy_selects[0][0];
 134         floppy_selects[0][0] ^= floppy_selects[0][1];
 135 }
 136
 137 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
 138
 139 #endif