/*
 * Copyright (c) 2014 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@backplane.com>
 *
 * 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. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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.
 */

#ifndef _BUS_SMBUS_INTELGEN4_IG4_VAR_H_
#define _BUS_SMBUS_INTELGEN4_IG4_VAR_H_

#include "bus_if.h"
#include "device_if.h"
#include "pci_if.h"
#include "smbus_if.h"
#include "pcidevs.h"

#define IG4_RBUFSIZE	128
#define IG4_RBUFMASK	(IG4_RBUFSIZE - 1)

enum ig4_op { IG4_IDLE, IG4_READ, IG4_WRITE };

enum ig4_vers {
	IG4_HASWELL = 0,
	IG4_ATOM,	/* Bay Trail, Braswell, Cherryview */
	IG4_SKYLAKE,	/* Skylake-U/Y and Kaby Lake-U/Y */
	IG4_APL,
	IG4_CANNONLAKE
};

struct ig4iic_softc {
	device_t	dev;
	device_t	smb;
	device_t	acpismb;
	struct resource	*regs_res;
	int		regs_rid;
	bus_space_tag_t regs_t;
	bus_space_handle_t regs_h;
	struct resource	*intr_res;
	int		intr_rid;
	void		*intr_handle;
	int		intr_type;
	enum ig4_vers	version;
	enum ig4_op	op;
	int		cmd;
	int		rnext;
	int		rpos;
	char		rbuf[IG4_RBUFSIZE];
	uint32_t	intr_mask;
	int		error;
	uint8_t		last_slave;
	int		pci_attached : 1;
	int		generic_attached : 1;
	int		use_10bit : 1;
	int		slave_valid : 1;
	int		read_started : 1;
	int		write_started : 1;
	struct lwkt_serialize slz;
};

typedef struct ig4iic_softc ig4iic_softc_t;

/* Attach/Detach called from ig4iic_pci_*() */
int ig4iic_attach(ig4iic_softc_t *sc);
int ig4iic_detach(ig4iic_softc_t *sc);

/* SMBus methods */
extern smbus_callback_t ig4iic_smb_callback;
extern smbus_quick_t    ig4iic_smb_quick;
extern smbus_sendb_t    ig4iic_smb_sendb;
extern smbus_recvb_t    ig4iic_smb_recvb;
extern smbus_writeb_t   ig4iic_smb_writeb;
extern smbus_writew_t   ig4iic_smb_writew;
extern smbus_readb_t    ig4iic_smb_readb;
extern smbus_readw_t    ig4iic_smb_readw;
extern smbus_pcall_t    ig4iic_smb_pcall;
extern smbus_bwrite_t   ig4iic_smb_bwrite;
extern smbus_bread_t    ig4iic_smb_bread;
extern smbus_trans_t    ig4iic_smb_trans;

#endif