1/*-
2 * Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
3 * All rights reserved.
4 *
5 * Developed by Semihalf.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of MARVELL nor the names of contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef _TWSI_H_
33#define	_TWSI_H_
34
35#include <dev/clk/clk.h>
36
37struct twsi_baud_rate {
38	uint32_t	raw;
39	int		param;
40	int		m;
41	int		n;
42};
43
44struct twsi_softc {
45	device_t	dev;
46	struct resource	*res[2];
47	struct mtx	mutex;
48	device_t	iicbus;
49	clk_t		clk_core;
50	clk_t		clk_reg;
51	void *			intrhand;
52	bool			have_intr;
53
54	struct iic_msg		*msgs;
55	uint32_t		nmsgs;
56	uint32_t		msg_idx;
57	uint16_t		sent_bytes;
58	uint16_t		recv_bytes;
59	int			transfer;
60	int			error;
61	int			debug;
62	uint32_t		control_val;
63	bool			iflag_w1c;
64
65	bus_size_t	reg_data;
66	bus_size_t	reg_slave_addr;
67	bus_size_t	reg_slave_ext_addr;
68	bus_size_t	reg_control;
69	bus_size_t	reg_status;
70	bus_size_t	reg_baud_rate;
71	bus_size_t	reg_soft_reset;
72	struct twsi_baud_rate  baud_rate[IIC_FASTEST + 1];
73};
74
75DECLARE_CLASS(twsi_driver);
76
77#define	TWSI_BAUD_RATE_PARAM(M,N)	((((M) << 3) | ((N) & 0x7)) & 0x7f)
78
79int twsi_attach(device_t);
80int twsi_detach(device_t);
81
82#endif /* _TWSI_H_ */
83