source: src/linux/universal/linux-3.18/arch/arm/include/asm/floppy.h @ 31869

Last change on this file since 31869 was 31869, checked in by brainslayer, 3 months ago

update

File size: 3.6 KB
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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) == (u32)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
33static 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 */
59static unsigned char floppy_selects[2][4] =
60{
61        { 0x10, 0x21, 0x23, 0x33 },
62        { 0x10, 0x21, 0x23, 0x33 }
63};
64
65#define fd_setdor(dor)                                                          \
66do {                                                                            \
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 */
78static 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 */
139static 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
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