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 IRQF_DISABLED,"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 */ 50static unsigned char floppy_selects[2][4] = 51{ 52 { 0x10, 0x21, 0x23, 0x33 }, 53 { 0x10, 0x21, 0x23, 0x33 } 54}; 55 56#define fd_setdor(dor) \ 57do { \ 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 */ 69static inline void fd_scandrives (void) 70{ 71 floppy_selects[0][0] = 0x10; 72 floppy_selects[0][1] = 0x21; 73 floppy_selects[0][2] = 0x23; 74 floppy_selects[0][3] = 0x33; 75} 76 77#define FDC1 (0x3f0) 78 79#define FLOPPY0_TYPE 4 80#define FLOPPY1_TYPE 4 81 82#define N_FDC 1 83#define N_DRIVE 4 84 85#define FLOPPY_MOTOR_MASK 0xf0 86 87#define CROSS_64KB(a,s) (0) 88 89/* 90 * This allows people to reverse the order of 91 * fd0 and fd1, in case their hardware is 92 * strangely connected (as some RiscPCs 93 * and A5000s seem to be). 94 */ 95static void driveswap(int *ints, int dummy, int dummy2) 96{ 97 floppy_selects[0][0] ^= floppy_selects[0][1]; 98 floppy_selects[0][1] ^= floppy_selects[0][0]; 99 floppy_selects[0][0] ^= floppy_selects[0][1]; 100} 101 102#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 } 103 104#endif 105