1. 根目录:
2. arch
3. mips
4. include
5. asm
6. mach-jazz
7. floppy.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1998, 2003 by Ralf Baechle
 */
#ifndef __ASM_MACH_JAZZ_FLOPPY_H
#define __ASM_MACH_JAZZ_FLOPPY_H

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <asm/addrspace.h>
#include <asm/jazz.h>
#include <asm/jazzdma.h>
#include <asm/pgtable.h>

static inline unsigned char fd_inb(unsigned int port)
{
	unsigned char c;

	c = *(volatile unsigned char *) port;
	udelay(1);

	return c;
}

static inline void fd_outb(unsigned char value, unsigned int port)
{
	*(volatile unsigned char *) port = value;
}

/*
 * How to access the floppy DMA functions.
 */
static inline void fd_enable_dma(void)
{
	vdma_enable(JAZZ_FLOPPY_DMA);
}

static inline void fd_disable_dma(void)
{
	vdma_disable(JAZZ_FLOPPY_DMA);
}

static inline int fd_request_dma(void)
{
	return 0;
}

static inline void fd_free_dma(void)
{
}

static inline void fd_clear_dma_ff(void)
{
}

static inline void fd_set_dma_mode(char mode)
{
	vdma_set_mode(JAZZ_FLOPPY_DMA, mode);
}

static inline void fd_set_dma_addr(char *a)
{
	vdma_set_addr(JAZZ_FLOPPY_DMA, vdma_phys2log(CPHYSADDR((unsigned long)a)));
}

static inline void fd_set_dma_count(unsigned int count)
{
	vdma_set_count(JAZZ_FLOPPY_DMA, count);
}

static inline int fd_get_dma_residue(void)
{
	return vdma_get_residue(JAZZ_FLOPPY_DMA);
}

static inline void fd_enable_irq(void)
{
}

static inline void fd_disable_irq(void)
{
}

static inline int fd_request_irq(void)
{
	return request_irq(FLOPPY_IRQ, floppy_interrupt,
	                   IRQF_DISABLED, "floppy", NULL);
}

static inline void fd_free_irq(void)
{
	free_irq(FLOPPY_IRQ, NULL);
}

static inline unsigned long fd_getfdaddr1(void)
{
	return JAZZ_FDC_BASE;
}

static inline unsigned long fd_dma_mem_alloc(unsigned long size)
{
	unsigned long mem;

	mem = __get_dma_pages(GFP_KERNEL, get_order(size));
	if(!mem)
		return 0;
	vdma_alloc(CPHYSADDR(mem), size);	/* XXX error checking */

	return mem;
}

static inline void fd_dma_mem_free(unsigned long addr, unsigned long size)
{
	vdma_free(vdma_phys2log(CPHYSADDR(addr)));
	free_pages(addr, get_order(size));
}

static inline unsigned long fd_drive_type(unsigned long n)
{
	/* XXX This is wrong for machines with ED 2.88mb disk drives like the
	   Olivetti M700.  Anyway, we should suck this from the ARC
	   firmware.  */
	if (n == 0)
		return 4;	/* 3,5", 1.44mb */

	return 0;
}

#endif /* __ASM_MACH_JAZZ_FLOPPY_H */