/* 
** Copyright 2002, Thomas Kurschel. All rights reserved.
** Distributed under the terms of the NewOS License.
*/

// this is not to be taken seriously - it's just a simple module

#ifndef __ISA_H__
#define __ISA_H__

#include <module.h>
#include <bus.h>

#define ISA_MODULE_NAME "bus_managers/isa/v1"

typedef struct {
	ulong	address;				/* memory address (little endian!) 4 bytes */
	ushort	transfer_count;			/* # transfers minus one (little endian!) 2 bytes*/
	uchar	reserved;				/* filler, 1byte*/
    uchar   flag;					/* end of link flag, 1byte */
} isa_dma_entry;

typedef struct {
	bus_manager_info   binfo;
	uint8			   (*read_io_8)   (int mapped_io_addr);
	void			   (*write_io_8)  (int mapped_io_addr, uint8 value);
	uint16			   (*read_io_16)  (int mapped_io_addr);
	void			   (*write_io_16) (int mapped_io_addr, uint16 value);
	uint32			   (*read_io_32)  (int mapped_io_addr);
	void			   (*write_io_32) (int mapped_io_addr, uint32 value);
	void              *(*ram_address) (const void *physical_address_in_system_memory);

	long			   (*make_isa_dma_table) (
							const void		*buffer,		/* buffer to make a table for */
							long			buffer_size,	/* buffer size */
							ulong			num_bits,		/* dma transfer size that will be used */
							isa_dma_entry	*table,			/* -> caller-supplied scatter/gather table */
							long			num_entries		/* max # entries in table */
						);
	long		       (*start_isa_dma) (
							long	channel,				/* dma channel to use */
							void	*buf,					/* buffer to transfer */
							long	transfer_count,			/* # transfers */
							uchar	mode,					/* mode flags */
							uchar	e_mode					/* extended mode flags */
						);
	long			(*start_scattered_isa_dma) (
							long				channel,	/* channel # to use */
							const isa_dma_entry	*table,		/* physical address of scatter/gather table */
							uchar				mode,		/* mode flags */
							uchar				emode		/* extended mode flags */
						);
	long			(*lock_isa_dma_channel) (long channel);
	long			(*unlock_isa_dma_channel) (long channel);

} isa_bus_manager;

#endif