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					    IRQF_DISABLED,"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 */
50static unsigned char floppy_selects[2][4] =
51{
52	{ 0x10, 0x21, 0x23, 0x33 },
53	{ 0x10, 0x21, 0x23, 0x33 }
54};
55
56#define fd_setdor(dor)								\
57do {										\
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 */
69static inline void fd_scandrives (void)
70{
71	floppy_selects[0][0] = 0x10;
72	floppy_selects[0][1] = 0x21;
73	floppy_selects[0][2] = 0x23;
74	floppy_selects[0][3] = 0x33;
75}
76
77#define FDC1 (0x3f0)
78
79#define FLOPPY0_TYPE 4
80#define FLOPPY1_TYPE 4
81
82#define N_FDC 1
83#define N_DRIVE 4
84
85#define FLOPPY_MOTOR_MASK 0xf0
86
87#define CROSS_64KB(a,s) (0)
88
89/*
90 * This allows people to reverse the order of
91 * fd0 and fd1, in case their hardware is
92 * strangely connected (as some RiscPCs
93 * and A5000s seem to be).
94 */
95static void driveswap(int *ints, int dummy, int dummy2)
96{
97	floppy_selects[0][0] ^= floppy_selects[0][1];
98	floppy_selects[0][1] ^= floppy_selects[0][0];
99	floppy_selects[0][0] ^= floppy_selects[0][1];
100}
101
102#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
103
104#endif
105