floppy.h 3.7 KB

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