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