Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 15 | #define fd_outb(val,port) \ |
| 16 | do { \ |
| 17 | if ((port) == 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 | SA_INTERRUPT|SA_SAMPLE_RANDOM,"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 | #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 | |
| 40 | /* need to clean up dma.h */ |
| 41 | #define DMA_FLOPPYDISK DMA_FLOPPY |
| 42 | |
| 43 | /* Floppy_selects is the list of DOR's to select drive fd |
| 44 | * |
| 45 | * On initialisation, the floppy list is scanned, and the drives allocated |
| 46 | * in the order that they are found. This is done by seeking the drive |
| 47 | * to a non-zero track, and then restoring it to track 0. If an error occurs, |
| 48 | * then there is no floppy drive present. [to be put back in again] |
| 49 | */ |
| 50 | static unsigned char floppy_selects[2][4] = |
| 51 | { |
| 52 | { 0x10, 0x21, 0x23, 0x33 }, |
| 53 | { 0x10, 0x21, 0x23, 0x33 } |
| 54 | }; |
| 55 | |
| 56 | #define fd_setdor(dor) \ |
| 57 | do { \ |
| 58 | int new_dor = (dor); \ |
| 59 | if (new_dor & 0xf0) \ |
| 60 | new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3]; \ |
| 61 | else \ |
| 62 | new_dor &= 0x0c; \ |
| 63 | outb(new_dor, FD_DOR); \ |
| 64 | } while (0) |
| 65 | |
| 66 | /* |
| 67 | * Someday, we'll automatically detect which drives are present... |
| 68 | */ |
| 69 | static inline void fd_scandrives (void) |
| 70 | { |
| 71 | #if 0 |
| 72 | int floppy, drive_count; |
| 73 | |
| 74 | fd_disable_irq(); |
| 75 | raw_cmd = &default_raw_cmd; |
| 76 | raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK; |
| 77 | raw_cmd->track = 0; |
| 78 | raw_cmd->rate = ?; |
| 79 | drive_count = 0; |
| 80 | for (floppy = 0; floppy < 4; floppy ++) { |
| 81 | current_drive = drive_count; |
| 82 | /* |
| 83 | * Turn on floppy motor |
| 84 | */ |
| 85 | if (start_motor(redo_fd_request)) |
| 86 | continue; |
| 87 | /* |
| 88 | * Set up FDC |
| 89 | */ |
| 90 | fdc_specify(); |
| 91 | /* |
| 92 | * Tell FDC to recalibrate |
| 93 | */ |
| 94 | output_byte(FD_RECALIBRATE); |
| 95 | LAST_OUT(UNIT(floppy)); |
| 96 | /* wait for command to complete */ |
| 97 | if (!successful) { |
| 98 | int i; |
| 99 | for (i = drive_count; i < 3; i--) |
| 100 | floppy_selects[fdc][i] = floppy_selects[fdc][i + 1]; |
| 101 | floppy_selects[fdc][3] = 0; |
| 102 | floppy -= 1; |
| 103 | } else |
| 104 | drive_count++; |
| 105 | } |
| 106 | #else |
| 107 | floppy_selects[0][0] = 0x10; |
| 108 | floppy_selects[0][1] = 0x21; |
| 109 | floppy_selects[0][2] = 0x23; |
| 110 | floppy_selects[0][3] = 0x33; |
| 111 | #endif |
| 112 | } |
| 113 | |
| 114 | #define FDC1 (0x3f0) |
| 115 | |
| 116 | #define FLOPPY0_TYPE 4 |
| 117 | #define FLOPPY1_TYPE 4 |
| 118 | |
| 119 | #define N_FDC 1 |
| 120 | #define N_DRIVE 4 |
| 121 | |
| 122 | #define FLOPPY_MOTOR_MASK 0xf0 |
| 123 | |
| 124 | #define CROSS_64KB(a,s) (0) |
| 125 | |
| 126 | /* |
| 127 | * This allows people to reverse the order of |
| 128 | * fd0 and fd1, in case their hardware is |
| 129 | * strangely connected (as some RiscPCs |
| 130 | * and A5000s seem to be). |
| 131 | */ |
| 132 | static void driveswap(int *ints, int dummy, int dummy2) |
| 133 | { |
| 134 | floppy_selects[0][0] ^= floppy_selects[0][1]; |
| 135 | floppy_selects[0][1] ^= floppy_selects[0][0]; |
| 136 | floppy_selects[0][0] ^= floppy_selects[0][1]; |
| 137 | } |
| 138 | |
| 139 | #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 } |
| 140 | |
| 141 | #endif |