v2.4.8 -> v2.4.8.1
[opensuse:kernel.git] / include / asm-arm / floppy.h
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 #if 0
15 #include <asm/arch/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                                         SA_INTERRUPT|SA_SAMPLE_RANDOM,"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 #define fd_request_dma()        request_dma(DMA_FLOPPY,"floppy")
34 #define fd_free_dma()           free_dma(DMA_FLOPPY)
35 #define fd_disable_dma()        disable_dma(DMA_FLOPPY)
36 #define fd_enable_dma()         enable_dma(DMA_FLOPPY)
37 #define fd_clear_dma_ff()       clear_dma_ff(DMA_FLOPPY)
38 #define fd_set_dma_mode(mode)   set_dma_mode(DMA_FLOPPY, (mode))
39 #define fd_set_dma_addr(addr)   set_dma_addr(DMA_FLOPPY, virt_to_bus((addr)))
40 #define fd_set_dma_count(len)   set_dma_count(DMA_FLOPPY, (len))
41 #define fd_cacheflush(addr,sz)
42
43 /* need to clean up dma.h */
44 #define DMA_FLOPPYDISK          DMA_FLOPPY
45
46 /* Floppy_selects is the list of DOR's to select drive fd
47  *
48  * On initialisation, the floppy list is scanned, and the drives allocated
49  * in the order that they are found.  This is done by seeking the drive
50  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
51  * then there is no floppy drive present.       [to be put back in again]
52  */
53 static unsigned char floppy_selects[2][4] =
54 {
55         { 0x10, 0x21, 0x23, 0x33 },
56         { 0x10, 0x21, 0x23, 0x33 }
57 };
58
59 #define fd_setdor(dor)                                                          \
60 do {                                                                            \
61         int new_dor = (dor);                                                    \
62         if (new_dor & 0xf0)                                                     \
63                 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
64         else                                                                    \
65                 new_dor &= 0x0c;                                                \
66         outb(new_dor, FD_DOR);                                                  \
67 } while (0)
68
69 /*
70  * Someday, we'll automatically detect which drives are present...
71  */
72 static inline void fd_scandrives (void)
73 {
74 #if 0
75         int floppy, drive_count;
76
77         fd_disable_irq();
78         raw_cmd = &default_raw_cmd;
79         raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
80         raw_cmd->track = 0;
81         raw_cmd->rate = ?;
82         drive_count = 0;
83         for (floppy = 0; floppy < 4; floppy ++) {
84                 current_drive = drive_count;
85                 /*
86                  * Turn on floppy motor
87                  */
88                 if (start_motor(redo_fd_request))
89                         continue;
90                 /*
91                  * Set up FDC
92                  */
93                 fdc_specify();
94                 /*
95                  * Tell FDC to recalibrate
96                  */
97                 output_byte(FD_RECALIBRATE);
98                 LAST_OUT(UNIT(floppy));
99                 /* wait for command to complete */
100                 if (!successful) {
101                         int i;
102                         for (i = drive_count; i < 3; i--)
103                                 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
104                         floppy_selects[fdc][3] = 0;
105                         floppy -= 1;
106                 } else
107                         drive_count++;
108         }
109 #else
110         floppy_selects[0][0] = 0x10;
111         floppy_selects[0][1] = 0x21;
112         floppy_selects[0][2] = 0x23;
113         floppy_selects[0][3] = 0x33;
114 #endif
115 }
116
117 #define FDC1 (0x3f0)
118
119 #define FLOPPY0_TYPE 4
120 #define FLOPPY1_TYPE 4
121
122 #define N_FDC 1
123 #define N_DRIVE 4
124
125 #define FLOPPY_MOTOR_MASK 0xf0
126
127 #define CROSS_64KB(a,s) (0)
128
129 /*
130  * This allows people to reverse the order of
131  * fd0 and fd1, in case their hardware is
132  * strangely connected (as some RiscPCs
133  * and A5000s seem to be).
134  */
135 static void driveswap(int *ints, int dummy, int dummy2)
136 {
137         floppy_selects[0][0] ^= floppy_selects[0][1];
138         floppy_selects[0][1] ^= floppy_selects[0][0];
139         floppy_selects[0][0] ^= floppy_selects[0][1];
140 }
141
142 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
143         
144 #endif