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
  12 #define fd_outb(val, base, reg)                                         \
  13         do {                                                            \
  14                 int new_val = (val);                                    \
  15                 if ((reg) == FD_DOR) {                                  \
  16                         if (new_val & 0xf0)                             \
  17                                 new_val = (new_val & 0x0c) |            \
  18                                           floppy_selects[new_val & 3];  \
  19                         else                                            \
  20                                 new_val &= 0x0c;                        \
  21                 }                                                       \
  22                 outb(new_val, (base) + (reg));                          \
  23         } while(0)
  24
  25 #define fd_inb(base, reg)       inb((base) + (reg))
  26 #define fd_request_irq()        request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
  27                                             0,"floppy",NULL)
  28 #define fd_free_irq()           free_irq(IRQ_FLOPPYDISK,NULL)
  29 #define fd_disable_irq()        disable_irq(IRQ_FLOPPYDISK)
  30 #define fd_enable_irq()         enable_irq(IRQ_FLOPPYDISK)
  31
  32 static inline int fd_dma_setup(void *data, unsigned int length,
  33                                unsigned int mode, unsigned long addr)
  34 {
  35         set_dma_mode(DMA_FLOPPY, mode);
  36         __set_dma_addr(DMA_FLOPPY, data);
  37         set_dma_count(DMA_FLOPPY, length);
  38         virtual_dma_port = addr;
  39         enable_dma(DMA_FLOPPY);
  40         return 0;
  41 }
  42 #define fd_dma_setup            fd_dma_setup
  43
  44 #define fd_request_dma()        request_dma(DMA_FLOPPY,"floppy")
  45 #define fd_free_dma()           free_dma(DMA_FLOPPY)
  46 #define fd_disable_dma()        disable_dma(DMA_FLOPPY)
  47
  48 /* need to clean up dma.h */
  49 #define DMA_FLOPPYDISK          DMA_FLOPPY
  50
  51 /* Floppy_selects is the list of DOR's to select drive fd
  52  *
  53  * On initialisation, the floppy list is scanned, and the drives allocated
  54  * in the order that they are found.  This is done by seeking the drive
  55  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
  56  * then there is no floppy drive present.       [to be put back in again]
  57  */
  58 static unsigned char floppy_selects[4] = { 0x10, 0x21, 0x23, 0x33 };
  59
  60 #define FDC1 (0x3f0)
  61
  62 #define FLOPPY0_TYPE 4
  63 #define FLOPPY1_TYPE 4
  64
  65 #define N_FDC 1
  66 #define N_DRIVE 4
  67
  68 #define CROSS_64KB(a,s) (0)
  69
  70 /*
  71  * This allows people to reverse the order of
  72  * fd0 and fd1, in case their hardware is
  73  * strangely connected (as some RiscPCs
  74  * and A5000s seem to be).
  75  */
  76 static void driveswap(int *ints, int dummy, int dummy2)
  77 {
  78         swap(floppy_selects[0], floppy_selects[1]);
  79 }
  80
  81 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
  82
  83 #endif