1 /* 2 * arch/arm/include/asm/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 <mach/floppy.h> 16 #endif 17 18 #define fd_outb(val,port) \ 19 do { \ 20 if ((port) == FD_DOR) \ 21 fd_setdor((val)); \ 22 else \ 23 outb((val),(port)); \ 24 } while(0) 25 26 #define fd_inb(port) inb((port)) 27 #define fd_request_irq() request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\ 28 0,"floppy",NULL) 29 #define fd_free_irq() free_irq(IRQ_FLOPPYDISK,NULL) 30 #define fd_disable_irq() disable_irq(IRQ_FLOPPYDISK) 31 #define fd_enable_irq() enable_irq(IRQ_FLOPPYDISK) 32 33 static inline int fd_dma_setup(void *data, unsigned int length, 34 unsigned int mode, unsigned long addr) 35 { 36 set_dma_mode(DMA_FLOPPY, mode); 37 __set_dma_addr(DMA_FLOPPY, data); 38 set_dma_count(DMA_FLOPPY, length); 39 virtual_dma_port = addr; 40 enable_dma(DMA_FLOPPY); 41 return 0; 42 } 43 #define fd_dma_setup fd_dma_setup 44 45 #define fd_request_dma() request_dma(DMA_FLOPPY,"floppy") 46 #define fd_free_dma() free_dma(DMA_FLOPPY) 47 #define fd_disable_dma() disable_dma(DMA_FLOPPY) 48 49 /* need to clean up dma.h */ 50 #define DMA_FLOPPYDISK DMA_FLOPPY 51 52 /* Floppy_selects is the list of DOR's to select drive fd 53 * 54 * On initialisation, the floppy list is scanned, and the drives allocated 55 * in the order that they are found. This is done by seeking the drive 56 * to a non-zero track, and then restoring it to track 0. If an error occurs, 57 * then there is no floppy drive present. [to be put back in again] 58 */ 59 static unsigned char floppy_selects[2][4] = 60 { 61 { 0x10, 0x21, 0x23, 0x33 }, 62 { 0x10, 0x21, 0x23, 0x33 } 63 }; 64 65 #define fd_setdor(dor) \ 66 do { \ 67 int new_dor = (dor); \ 68 if (new_dor & 0xf0) \ 69 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3]; \ 70 else \ 71 new_dor &= 0x0c; \ 72 outb(new_dor, FD_DOR); \ 73 } while (0) 74 75 /* 76 * Someday, we'll automatically detect which drives are present... 77 */ 78 static inline void fd_scandrives (void) 79 { 80 #if 0 81 int floppy, drive_count; 82 83 fd_disable_irq(); 84 raw_cmd = &default_raw_cmd; 85 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK; 86 raw_cmd->track = 0; 87 raw_cmd->rate = ?; 88 drive_count = 0; 89 for (floppy = 0; floppy < 4; floppy ++) { 90 current_drive = drive_count; 91 /* 92 * Turn on floppy motor 93 */ 94 if (start_motor(redo_fd_request)) 95 continue; 96 /* 97 * Set up FDC 98 */ 99 fdc_specify(); 100 /* 101 * Tell FDC to recalibrate 102 */ 103 output_byte(FD_RECALIBRATE); 104 LAST_OUT(UNIT(floppy)); 105 /* wait for command to complete */ 106 if (!successful) { 107 int i; 108 for (i = drive_count; i < 3; i--) 109 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1]; 110 floppy_selects[fdc][3] = 0; 111 floppy -= 1; 112 } else 113 drive_count++; 114 } 115 #else 116 floppy_selects[0][0] = 0x10; 117 floppy_selects[0][1] = 0x21; 118 floppy_selects[0][2] = 0x23; 119 floppy_selects[0][3] = 0x33; 120 #endif 121 } 122 123 #define FDC1 (0x3f0) 124 125 #define FLOPPY0_TYPE 4 126 #define FLOPPY1_TYPE 4 127 128 #define N_FDC 1 129 #define N_DRIVE 4 130 131 #define CROSS_64KB(a,s) (0) 132 133 /* 134 * This allows people to reverse the order of 135 * fd0 and fd1, in case their hardware is 136 * strangely connected (as some RiscPCs 137 * and A5000s seem to be). 138 */ 139 static void driveswap(int *ints, int dummy, int dummy2) 140 { 141 floppy_selects[0][0] ^= floppy_selects[0][1]; 142 floppy_selects[0][1] ^= floppy_selects[0][0]; 143 floppy_selects[0][0] ^= floppy_selects[0][1]; 144 } 145 146 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 } 147 148 #endif 149