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
fd_dma_setup(void * data,unsigned int length,unsigned int mode,unsigned long addr)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 */
fd_scandrives(void)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 */
driveswap(int * ints,int dummy,int dummy2)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
