1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  arch/arm/include/asm/floppy.h
4 *
5 *  Copyright (C) 1996-2000 Russell King
6 *
7 *  Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
8 */
9#ifndef __ASM_ARM_FLOPPY_H
10#define __ASM_ARM_FLOPPY_H
11
12#define fd_outb(val, base, reg)						\
13	do {								\
14		int new_val = (val);					\
15		if ((reg) == FD_DOR) {					\
16			if (new_val & 0xf0)				\
17				new_val = (new_val & 0x0c) |		\
18					  floppy_selects[new_val & 3];	\
19			else						\
20				new_val &= 0x0c;			\
21		}							\
22		outb(new_val, (base) + (reg));				\
23	} while(0)
24
25#define fd_inb(base, reg)	inb((base) + (reg))
26#define fd_request_irq()	request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
27					    0,"floppy",NULL)
28#define fd_free_irq()		free_irq(IRQ_FLOPPYDISK,NULL)
29#define fd_disable_irq()	disable_irq(IRQ_FLOPPYDISK)
30#define fd_enable_irq()		enable_irq(IRQ_FLOPPYDISK)
31
32static inline int fd_dma_setup(void *data, unsigned int length,
33			       unsigned int mode, unsigned long addr)
34{
35	set_dma_mode(DMA_FLOPPY, mode);
36	__set_dma_addr(DMA_FLOPPY, data);
37	set_dma_count(DMA_FLOPPY, length);
38	virtual_dma_port = addr;
39	enable_dma(DMA_FLOPPY);
40	return 0;
41}
42#define fd_dma_setup		fd_dma_setup
43
44#define fd_request_dma()	request_dma(DMA_FLOPPY,"floppy")
45#define fd_free_dma()		free_dma(DMA_FLOPPY)
46#define fd_disable_dma()	disable_dma(DMA_FLOPPY)
47
48/* need to clean up dma.h */
49#define DMA_FLOPPYDISK		DMA_FLOPPY
50
51/* Floppy_selects is the list of DOR's to select drive fd
52 *
53 * On initialisation, the floppy list is scanned, and the drives allocated
54 * in the order that they are found.  This is done by seeking the drive
55 * to a non-zero track, and then restoring it to track 0.  If an error occurs,
56 * then there is no floppy drive present.       [to be put back in again]
57 */
58static unsigned char floppy_selects[4] = { 0x10, 0x21, 0x23, 0x33 };
59
60#define FDC1 (0x3f0)
61
62#define FLOPPY0_TYPE 4
63#define FLOPPY1_TYPE 4
64
65#define N_FDC 1
66#define N_DRIVE 4
67
68#define CROSS_64KB(a,s) (0)
69
70/*
71 * This allows people to reverse the order of
72 * fd0 and fd1, in case their hardware is
73 * strangely connected (as some RiscPCs
74 * and A5000s seem to be).
75 */
76static void driveswap(int *ints, int dummy, int dummy2)
77{
78	swap(floppy_selects[0], floppy_selects[1]);
79}
80
81#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
82
83#endif
84