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[linux-2.6.34-lpc32xx.git] / arch / arm / include / asm / floppy.h
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                                             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)
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