2 * arch/arm/include/asm/floppy.h
4 * Copyright (C) 1996-2000 Russell King
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.
10 * Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
12 #ifndef __ASM_ARM_FLOPPY_H
13 #define __ASM_ARM_FLOPPY_H
15 #include <asm/arch/floppy.h>
18 #define fd_outb(val,port) \
20 if ((port) == FD_DOR) \
26 #define fd_inb(port) inb((port))
27 #define fd_request_irq() request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
28 IRQF_DISABLED,"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)
33 static inline int fd_dma_setup(void *data, unsigned int length,
34 unsigned int mode, unsigned long addr)
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);
43 #define fd_dma_setup fd_dma_setup
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)
49 /* need to clean up dma.h */
50 #define DMA_FLOPPYDISK DMA_FLOPPY
52 /* Floppy_selects is the list of DOR's to select drive fd
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]
59 static unsigned char floppy_selects[2][4] =
61 { 0x10, 0x21, 0x23, 0x33 },
62 { 0x10, 0x21, 0x23, 0x33 }
65 #define fd_setdor(dor) \
67 int new_dor = (dor); \
69 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3]; \
72 outb(new_dor, FD_DOR); \
76 * Someday, we'll automatically detect which drives are present...
78 static inline void fd_scandrives (void)
81 int floppy, drive_count;
84 raw_cmd = &default_raw_cmd;
85 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
89 for (floppy = 0; floppy < 4; floppy ++) {
90 current_drive = drive_count;
92 * Turn on floppy motor
94 if (start_motor(redo_fd_request))
101 * Tell FDC to recalibrate
103 output_byte(FD_RECALIBRATE);
104 LAST_OUT(UNIT(floppy));
105 /* wait for command to complete */
108 for (i = drive_count; i < 3; i--)
109 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
110 floppy_selects[fdc][3] = 0;
116 floppy_selects[0][0] = 0x10;
117 floppy_selects[0][1] = 0x21;
118 floppy_selects[0][2] = 0x23;
119 floppy_selects[0][3] = 0x33;
125 #define FLOPPY0_TYPE 4
126 #define FLOPPY1_TYPE 4
131 #define CROSS_64KB(a,s) (0)
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).
139 static void driveswap(int *ints, int dummy, int dummy2)
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];
146 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }