1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/* $OpenBSD: i2c.c,v 1.16 2015/03/14 03:38:47 jsg Exp $ */
/* $NetBSD: i2c.c,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/event.h>
#define _I2C_PRIVATE
#include <dev/i2c/i2cvar.h>
#define IICCF_ADDR 0
#define IICCF_SIZE 1
struct iic_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
};
int iic_match(struct device *, void *, void *);
void iic_attach(struct device *, struct device *, void *);
int iic_search(struct device *, void *, void *);
struct cfattach iic_ca = {
sizeof (struct iic_softc),
iic_match,
iic_attach
};
struct cfdriver iic_cd = {
NULL, "iic", DV_DULL
};
int
iicbus_print(void *aux, const char *pnp)
{
struct i2cbus_attach_args *iba = aux;
if (pnp != NULL)
printf("%s at %s", iba->iba_name, pnp);
return (UNCONF);
}
int
iic_print(void *aux, const char *pnp)
{
struct i2c_attach_args *ia = aux;
if (pnp != NULL)
printf("\"%s\" at %s", ia->ia_name, pnp);
printf(" addr 0x%x", ia->ia_addr);
return (UNCONF);
}
int
iic_search(struct device *parent, void *arg, void *aux)
{
struct iic_softc *sc = (void *) parent;
struct cfdata *cf = arg;
struct i2c_attach_args ia;
if (cf->cf_loc[IICCF_ADDR] != -1) {
memset(&ia, 0, sizeof(ia));
ia.ia_tag = sc->sc_tag;
ia.ia_addr = cf->cf_loc[IICCF_ADDR];
ia.ia_size = cf->cf_loc[IICCF_SIZE];
ia.ia_name = "unknown";
if (cf->cf_attach->ca_match(parent, cf, &ia) > 0)
config_attach(parent, cf, &ia, iic_print);
}
return (0);
}
int
iic_match(struct device *parent, void *arg, void *aux)
{
struct cfdata *cf = arg;
struct i2cbus_attach_args *iba = aux;
/* Just make sure we're looking for i2c. */
return (strcmp(iba->iba_name, cf->cf_driver->cd_name) == 0);
}
void
iic_attach(struct device *parent, struct device *self, void *aux)
{
struct iic_softc *sc = (void *) self;
struct i2cbus_attach_args *iba = aux;
sc->sc_tag = iba->iba_tag;
printf("\n");
/*
* Attach all i2c devices described in the kernel
* configuration file.
*/
config_search(iic_search, self, NULL);
/*
* Scan for known device signatures.
*/
if (iba->iba_bus_scan)
(iba->iba_bus_scan)(self, aux, iba->iba_bus_scan_arg);
else
iic_scan(self, aux);
}
|
