xref: /freebsd/sys/arm/broadcom/bcm2835/bcm2835_bscvar.h (revision 4ec234c813eed05c166859bba82c882e40826eb9)
1 /*-
2  * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
3  * Copyright (c) 2013 Luiz Otavio O Souza <loos@freebsd.org>
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD$
28  */
29 
30 #ifndef _BCM2835_BSCVAR_H
31 #define _BCM2835_BSCVAR_H
32 
33 struct {
34 	uint32_t	sda;
35 	uint32_t	scl;
36 	unsigned long	start;
37 } bcm_bsc_pins[] = {
38 	{ 0, 1, 0x20205000 },	/* BSC0 GPIO pins and base address. */
39 	{ 2, 3, 0x20804000 }	/* BSC1 GPIO pins and base address. */
40 };
41 
42 struct bcm_bsc_softc {
43 	device_t		sc_dev;
44 	struct mtx		sc_mtx;
45 	struct resource *	sc_mem_res;
46 	struct resource *	sc_irq_res;
47 	bus_space_tag_t		sc_bst;
48 	bus_space_handle_t	sc_bsh;
49 	uint16_t		sc_resid;
50 	uint8_t			*sc_data;
51 	uint8_t			sc_flags;
52 	void *			sc_intrhand;
53 };
54 
55 #define	BCM_I2C_BUSY		0x01
56 #define	BCM_I2C_READ		0x02
57 #define	BCM_I2C_ERROR		0x04
58 
59 #define	BCM_BSC_WRITE(_sc, _off, _val)		\
60     bus_space_write_4(_sc->sc_bst, _sc->sc_bsh, _off, _val)
61 #define	BCM_BSC_READ(_sc, _off)			\
62     bus_space_read_4(_sc->sc_bst, _sc->sc_bsh, _off)
63 
64 #define	BCM_BSC_LOCK(_sc)			\
65     mtx_lock(&(_sc)->sc_mtx)
66 #define	BCM_BSC_UNLOCK(_sc)			\
67     mtx_unlock(&(_sc)->sc_mtx)
68 
69 #endif	/* _BCM2835_BSCVAR_H_ */
70