/*
 *  linux/include/asm-arm/floppy.h
 *
 *  Copyright (C) 1996-2000 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
 */
#ifndef __ASM_ARM_FLOPPY_H
#define __ASM_ARM_FLOPPY_H

#define fd_outb(val,port)			\
	do {					\
		if ((port) == FD_DOR)		\
			fd_setdor((val));	\
		else				\
			outb((val),(port));	\
	} while(0)

#define fd_inb(port)		inb((port))
#define fd_request_irq()	request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
					SA_INTERRUPT|SA_SAMPLE_RANDOM,"floppy",NULL)
#define fd_free_irq()		free_irq(IRQ_FLOPPYDISK,NULL)
#define fd_disable_irq()	disable_irq(IRQ_FLOPPYDISK)
#define fd_enable_irq()		enable_irq(IRQ_FLOPPYDISK)

#define fd_request_dma()	request_dma(DMA_FLOPPY,"floppy")
#define fd_free_dma()		free_dma(DMA_FLOPPY)
#define fd_disable_dma()	disable_dma(DMA_FLOPPY)
#define fd_enable_dma()		enable_dma(DMA_FLOPPY)
#define fd_clear_dma_ff()	clear_dma_ff(DMA_FLOPPY)
#define fd_set_dma_mode(mode)	set_dma_mode(DMA_FLOPPY, (mode))
#define fd_set_dma_addr(addr)	set_dma_addr(DMA_FLOPPY, virt_to_bus((addr)))
#define fd_set_dma_count(len)	set_dma_count(DMA_FLOPPY, (len))
#define fd_cacheflush(addr,sz)

/* need to clean up dma.h */
#define DMA_FLOPPYDISK		DMA_FLOPPY

/* Floppy_selects is the list of DOR's to select drive fd
 *
 * On initialisation, the floppy list is scanned, and the drives allocated
 * in the order that they are found.  This is done by seeking the drive
 * to a non-zero track, and then restoring it to track 0.  If an error occurs,
 * then there is no floppy drive present.       [to be put back in again]
 */
static unsigned char floppy_selects[2][4] =
{
	{ 0x10, 0x21, 0x23, 0x33 },
	{ 0x10, 0x21, 0x23, 0x33 }
};

#define fd_setdor(dor)								\
do {										\
	int new_dor = (dor);							\
	if (new_dor & 0xf0)							\
		new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];	\
	else									\
		new_dor &= 0x0c;						\
	outb(new_dor, FD_DOR);							\
} while (0)

/*
 * Someday, we'll automatically detect which drives are present...
 */
static inline void fd_scandrives (void)
{
	floppy_selects[0][0] = 0x10;
	floppy_selects[0][1] = 0x21;
	floppy_selects[0][2] = 0x23;
	floppy_selects[0][3] = 0x33;
}

#define FDC1 (0x3f0)

#define FLOPPY0_TYPE 4
#define FLOPPY1_TYPE 4

#define N_FDC 1
#define N_DRIVE 4

#define FLOPPY_MOTOR_MASK 0xf0

#define CROSS_64KB(a,s) (0)

/*
 * This allows people to reverse the order of
 * fd0 and fd1, in case their hardware is
 * strangely connected (as some RiscPCs
 * and A5000s seem to be).
 */
static void driveswap(int *ints, int dummy, int dummy2)
{
	floppy_selects[0][0] ^= floppy_selects[0][1];
	floppy_selects[0][1] ^= floppy_selects[0][0];
	floppy_selects[0][0] ^= floppy_selects[0][1];
}

#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
	
#endif
