[PATCH] splice: add support for SPLICE_F_MOVE flag
[linux-2.6] / include / asm-arm26 / 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
15 #define fd_outb(val,port)                       \
16         do {                                    \
17                 if ((port) == FD_DOR)           \
18                         fd_setdor((val));       \
19                 else                            \
20                         outb((val),(port));     \
21         } while(0)
22
23 #define fd_inb(port)            inb((port))
24 #define fd_request_irq()        request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
25                                         SA_INTERRUPT|SA_SAMPLE_RANDOM,"floppy",NULL)
26 #define fd_free_irq()           free_irq(IRQ_FLOPPYDISK,NULL)
27 #define fd_disable_irq()        disable_irq(IRQ_FLOPPYDISK)
28 #define fd_enable_irq()         enable_irq(IRQ_FLOPPYDISK)
29
30 #define fd_request_dma()        request_dma(DMA_FLOPPY,"floppy")
31 #define fd_free_dma()           free_dma(DMA_FLOPPY)
32 #define fd_disable_dma()        disable_dma(DMA_FLOPPY)
33 #define fd_enable_dma()         enable_dma(DMA_FLOPPY)
34 #define fd_clear_dma_ff()       clear_dma_ff(DMA_FLOPPY)
35 #define fd_set_dma_mode(mode)   set_dma_mode(DMA_FLOPPY, (mode))
36 #define fd_set_dma_addr(addr)   set_dma_addr(DMA_FLOPPY, virt_to_bus((addr)))
37 #define fd_set_dma_count(len)   set_dma_count(DMA_FLOPPY, (len))
38 #define fd_cacheflush(addr,sz)
39
40 /* need to clean up dma.h */
41 #define DMA_FLOPPYDISK          DMA_FLOPPY
42
43 /* Floppy_selects is the list of DOR's to select drive fd
44  *
45  * On initialisation, the floppy list is scanned, and the drives allocated
46  * in the order that they are found.  This is done by seeking the drive
47  * to a non-zero track, and then restoring it to track 0.  If an error occurs,
48  * then there is no floppy drive present.       [to be put back in again]
49  */
50 static unsigned char floppy_selects[2][4] =
51 {
52         { 0x10, 0x21, 0x23, 0x33 },
53         { 0x10, 0x21, 0x23, 0x33 }
54 };
55
56 #define fd_setdor(dor)                                                          \
57 do {                                                                            \
58         int new_dor = (dor);                                                    \
59         if (new_dor & 0xf0)                                                     \
60                 new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
61         else                                                                    \
62                 new_dor &= 0x0c;                                                \
63         outb(new_dor, FD_DOR);                                                  \
64 } while (0)
65
66 /*
67  * Someday, we'll automatically detect which drives are present...
68  */
69 static inline void fd_scandrives (void)
70 {
71 #if 0
72         int floppy, drive_count;
73
74         fd_disable_irq();
75         raw_cmd = &default_raw_cmd;
76         raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
77         raw_cmd->track = 0;
78         raw_cmd->rate = ?;
79         drive_count = 0;
80         for (floppy = 0; floppy < 4; floppy ++) {
81                 current_drive = drive_count;
82                 /*
83                  * Turn on floppy motor
84                  */
85                 if (start_motor(redo_fd_request))
86                         continue;
87                 /*
88                  * Set up FDC
89                  */
90                 fdc_specify();
91                 /*
92                  * Tell FDC to recalibrate
93                  */
94                 output_byte(FD_RECALIBRATE);
95                 LAST_OUT(UNIT(floppy));
96                 /* wait for command to complete */
97                 if (!successful) {
98                         int i;
99                         for (i = drive_count; i < 3; i--)
100                                 floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
101                         floppy_selects[fdc][3] = 0;
102                         floppy -= 1;
103                 } else
104                         drive_count++;
105         }
106 #else
107         floppy_selects[0][0] = 0x10;
108         floppy_selects[0][1] = 0x21;
109         floppy_selects[0][2] = 0x23;
110         floppy_selects[0][3] = 0x33;
111 #endif
112 }
113
114 #define FDC1 (0x3f0)
115
116 #define FLOPPY0_TYPE 4
117 #define FLOPPY1_TYPE 4
118
119 #define N_FDC 1
120 #define N_DRIVE 4
121
122 #define FLOPPY_MOTOR_MASK 0xf0
123
124 #define CROSS_64KB(a,s) (0)
125
126 /*
127  * This allows people to reverse the order of
128  * fd0 and fd1, in case their hardware is
129  * strangely connected (as some RiscPCs
130  * and A5000s seem to be).
131  */
132 static void driveswap(int *ints, int dummy, int dummy2)
133 {
134         floppy_selects[0][0] ^= floppy_selects[0][1];
135         floppy_selects[0][1] ^= floppy_selects[0][0];
136         floppy_selects[0][0] ^= floppy_selects[0][1];
137 }
138
139 #define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
140         
141 #endif