1/*
2 *  arch/arm/include/asm/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 <mach/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					    0,"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
33static inline int fd_dma_setup(void *data, unsigned int length,
34			       unsigned int mode, unsigned long addr)
35{
36	set_dma_mode(DMA_FLOPPY, mode);
37	__set_dma_addr(DMA_FLOPPY, data);
38	set_dma_count(DMA_FLOPPY, length);
39	virtual_dma_port = addr;
40	enable_dma(DMA_FLOPPY);
41	return 0;
42}
43#define fd_dma_setup		fd_dma_setup
44
45#define fd_request_dma()	request_dma(DMA_FLOPPY,"floppy")
46#define fd_free_dma()		free_dma(DMA_FLOPPY)
47#define fd_disable_dma()	disable_dma(DMA_FLOPPY)
48
49/* need to clean up dma.h */
50#define DMA_FLOPPYDISK		DMA_FLOPPY
51
52/* Floppy_selects is the list of DOR's to select drive fd
53 *
54 * On initialisation, the floppy list is scanned, and the drives allocated
55 * in the order that they are found.  This is done by seeking the drive
56 * to a non-zero track, and then restoring it to track 0.  If an error occurs,
57 * then there is no floppy drive present.       [to be put back in again]
58 */
59static unsigned char floppy_selects[2][4] =
60{
61	{ 0x10, 0x21, 0x23, 0x33 },
62	{ 0x10, 0x21, 0x23, 0x33 }
63};
64
65#define fd_setdor(dor)								\
66do {										\
67	int new_dor = (dor);							\
68	if (new_dor & 0xf0)							\
69		new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];	\
70	else									\
71		new_dor &= 0x0c;						\
72	outb(new_dor, FD_DOR);							\
73} while (0)
74
75/*
76 * Someday, we'll automatically detect which drives are present...
77 */
78static inline void fd_scandrives (void)
79{
80#if 0
81	int floppy, drive_count;
82
83	fd_disable_irq();
84	raw_cmd = &default_raw_cmd;
85	raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
86	raw_cmd->track = 0;
87	raw_cmd->rate = ?;
88	drive_count = 0;
89	for (floppy = 0; floppy < 4; floppy ++) {
90		current_drive = drive_count;
91		/*
92		 * Turn on floppy motor
93		 */
94		if (start_motor(redo_fd_request))
95			continue;
96		/*
97		 * Set up FDC
98		 */
99		fdc_specify();
100		/*
101		 * Tell FDC to recalibrate
102		 */
103		output_byte(FD_RECALIBRATE);
104		LAST_OUT(UNIT(floppy));
105		/* wait for command to complete */
106		if (!successful) {
107			int i;
108			for (i = drive_count; i < 3; i--)
109				floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
110			floppy_selects[fdc][3] = 0;
111			floppy -= 1;
112		} else
113			drive_count++;
114	}
115#else
116	floppy_selects[0][0] = 0x10;
117	floppy_selects[0][1] = 0x21;
118	floppy_selects[0][2] = 0x23;
119	floppy_selects[0][3] = 0x33;
120#endif
121}
122
123#define FDC1 (0x3f0)
124
125#define FLOPPY0_TYPE 4
126#define FLOPPY1_TYPE 4
127
128#define N_FDC 1
129#define N_DRIVE 4
130
131#define CROSS_64KB(a,s) (0)
132
133/*
134 * This allows people to reverse the order of
135 * fd0 and fd1, in case their hardware is
136 * strangely connected (as some RiscPCs
137 * and A5000s seem to be).
138 */
139static void driveswap(int *ints, int dummy, int dummy2)
140{
141	floppy_selects[0][0] ^= floppy_selects[0][1];
142	floppy_selects[0][1] ^= floppy_selects[0][0];
143	floppy_selects[0][0] ^= floppy_selects[0][1];
144}
145
146#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
147
148#endif
149