1/*	$NetBSD: mii_bitbang.h,v 1.6 2009/05/12 14:31:27 cegger Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 1999 The NetBSD Foundation, Inc.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
11 * NASA Ames Research Center.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#define	MII_BIT_MDO		0	/* data out (host->PHY) */
36#define	MII_BIT_MDI		1	/* data in (PHY->host) */
37#define	MII_BIT_MDC		2	/* clock */
38#define	MII_BIT_DIR_HOST_PHY	3	/* set direction: host->PHY */
39#define	MII_BIT_DIR_PHY_HOST	4	/* set direction: PHY->host */
40#define	MII_NBITS		5
41
42struct mii_bitbang_ops {
43	uint32_t	(*mbo_read)(device_t);
44	void		(*mbo_write)(device_t, uint32_t);
45	uint32_t	mbo_bits[MII_NBITS];
46};
47
48typedef	const struct mii_bitbang_ops *mii_bitbang_ops_t;
49
50int	mii_bitbang_readreg(device_t dev, mii_bitbang_ops_t ops,
51	    int phy, int reg);
52void	mii_bitbang_sync(device_t dev, mii_bitbang_ops_t ops);
53void	mii_bitbang_writereg(device_t dev, mii_bitbang_ops_t ops,
54	    int phy, int reg, int val);
55