/*
 *  Copyright (C) 2007  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE   
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *
 *
 *  $Id: dev_clmpcc.c,v 1.6 2007/06/15 18:44:19 debug Exp $
 *
 *  COMMENT: Cirrus Logic 4-Channel Communications Controller (CD2400/CD2401)
 *
 *  TODO
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "console.h"
#include "cpu.h"
#include "device.h"
#include "emul.h"
#include "interrupt.h"
#include "machine.h"
#include "memory.h"
#include "misc.h"


#include "clmpccreg.h"

/*  #define debug fatal  */

#define	CLMPCC_LEN		0x200

struct clmpcc_data {
	unsigned char	reg[CLMPCC_LEN];

	int		console_handle;
	struct interrupt irq;
};


DEVICE_ACCESS(clmpcc)
{
	struct clmpcc_data *d = extra;
	uint64_t idata = 0, odata = 0;

	if (writeflag == MEM_WRITE)
		idata = memory_readmax64(cpu, data, len);

	if (writeflag == MEM_READ)
		odata = d->reg[relative_addr];

	switch (relative_addr) {

	case 0:	/*  Used by OpenBSD/mvme88k when probing...  */
		break;

	case CLMPCC_REG_SCHR3:
		console_putchar(d->console_handle, idata);
		break;

	default:if (writeflag == MEM_READ)
			debug("[ clmpcc: unimplemented READ from offset 0x%x ]"
			    "\n", (int)relative_addr);
		else
			debug("[ clmpcc: unimplemented WRITE to offset 0x%x: "
			    "0x%x ]\n", (int)relative_addr, (int)idata);
		/*  exit(1);  */
	}

	if (writeflag == MEM_READ)
		memory_writemax64(cpu, data, len, odata);

	return 1;
}


DEVINIT(clmpcc)
{
	struct clmpcc_data *d;

	CHECK_ALLOCATION(d = malloc(sizeof(struct clmpcc_data)));
	memset(d, 0, sizeof(struct clmpcc_data));

	d->console_handle =
	    console_start_slave(devinit->machine, devinit->name2 != NULL?
	    devinit->name2 : devinit->name, devinit->in_use);

	INTERRUPT_CONNECT(devinit->interrupt_path, d->irq);

	memory_device_register(devinit->machine->memory, devinit->name,
	    devinit->addr, CLMPCC_LEN, dev_clmpcc_access, (void *)d,
	    DM_DEFAULT, NULL);

	/*
	 *  NOTE:  Ugly cast into a pointer, because this is a convenient way
	 *         to return the console handle to code in src/machines/.
	 */
	devinit->return_ptr = (void *)(size_t)d->console_handle;

	return 1;
}