1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* Architecture specific parts of the Floppy driver
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995 - 2000 Ralf Baechle
*/
#ifndef _ASM_FLOPPY_H
#define _ASM_FLOPPY_H
#include <asm/bootinfo.h>
struct fd_ops {
unsigned char (*fd_inb)(unsigned int port);
void (*fd_outb)(unsigned char value, unsigned int port);
/*
* How to access the floppy DMA functions.
*/
void (*fd_enable_dma)(int channel);
void (*fd_disable_dma)(int channel);
int (*fd_request_dma)(int channel);
void (*fd_free_dma)(int channel);
void (*fd_clear_dma_ff)(int channel);
void (*fd_set_dma_mode)(int channel, char mode);
void (*fd_set_dma_addr)(int channel, unsigned int a);
void (*fd_set_dma_count)(int channel, unsigned int count);
int (*fd_get_dma_residue)(int channel);
void (*fd_enable_irq)(int irq);
void (*fd_disable_irq)(int irq);
unsigned long (*fd_getfdaddr1)(void);
unsigned long (*fd_dma_mem_alloc)(unsigned long size);
void (*fd_dma_mem_free)(unsigned long addr, unsigned long size);
unsigned long (*fd_drive_type)(unsigned long);
};
extern struct fd_ops *fd_ops;
#define fd_inb(port) fd_ops->fd_inb(port)
#define fd_outb(value,port) fd_ops->fd_outb(value,port)
#define fd_enable_dma() fd_ops->fd_enable_dma(FLOPPY_DMA)
#define fd_disable_dma() fd_ops->fd_disable_dma(FLOPPY_DMA)
#define fd_request_dma() fd_ops->fd_request_dma(FLOPPY_DMA)
#define fd_free_dma() fd_ops->fd_free_dma(FLOPPY_DMA)
#define fd_clear_dma_ff() fd_ops->fd_clear_dma_ff(FLOPPY_DMA)
#define fd_set_dma_mode(mode) fd_ops->fd_set_dma_mode(FLOPPY_DMA, mode)
#define fd_set_dma_addr(addr) fd_ops->fd_set_dma_addr(FLOPPY_DMA, \
virt_to_bus(addr))
#define fd_set_dma_count(count) fd_ops->fd_set_dma_count(FLOPPY_DMA,count)
#define fd_get_dma_residue() fd_ops->fd_get_dma_residue(FLOPPY_DMA)
#define fd_enable_irq() fd_ops->fd_enable_irq(FLOPPY_IRQ)
#define fd_disable_irq() fd_ops->fd_disable_irq(FLOPPY_IRQ)
#define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt, \
SA_INTERRUPT | SA_SAMPLE_RANDOM, \
"floppy", NULL)
#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
#define fd_dma_mem_alloc(size) fd_ops->fd_dma_mem_alloc(size)
#define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size)
#define fd_drive_type(n) fd_ops->fd_drive_type(n)
#define fd_cacheflush(addr,size) dma_cache_wback_inv(addr,size)
#define MAX_BUFFER_SECTORS 24
/*
* And on Mips's the CMOS info fails also ...
*
* FIXME: This information should come from the ARC configuration tree
* or whereever a particular machine has stored this ...
*/
#define FLOPPY0_TYPE fd_drive_type(0)
#define FLOPPY1_TYPE fd_drive_type(1)
#define FDC1 fd_ops->fd_getfdaddr1();
/*
* Hack: The floppy drivrer defines this, before including fdreg.h. We use
* to define FDC2 only one and keep it a static variable in floppy.c.
*/
#ifdef FDPATCHES
static int FDC2=-1;
#endif
#define N_FDC 1 /* do you *really* want a second controller? */
#define N_DRIVE 8
#define FLOPPY_MOTOR_MASK 0xf0
/*
* The DMA channel used by the floppy controller cannot access data at
* addresses >= 16MB
*
* Went back to the 1MB limit, as some people had problems with the floppy
* driver otherwise. It doesn't matter much for performance anyway, as most
* floppy accesses go through the track buffer.
*
* On MIPSes using vdma, this actually means that *all* transfers go thru
* the * track buffer since 0x1000000 is always smaller than KSEG0/1.
* Actually this needs to be a bit more complicated since the so much different
* hardware available with MIPS CPUs ...
*/
#define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
#endif /* _ASM_FLOPPY_H */
|
