Annotation of sys/dev/i2c/i2c.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: i2c.c,v 1.14 2006/02/26 20:24:46 deraadt Exp $ */
2: /* $NetBSD: i2c.c,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 2003 Wasabi Systems, Inc.
6: * All rights reserved.
7: *
8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed for the NetBSD Project by
21: * Wasabi Systems, Inc.
22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23: * or promote products derived from this software without specific prior
24: * written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
38:
39: #include <sys/param.h>
40: #include <sys/systm.h>
41: #include <sys/device.h>
42: #include <sys/event.h>
43: #include <sys/conf.h>
44:
45: #define _I2C_PRIVATE
46: #include <dev/i2c/i2cvar.h>
47:
48: #define IICCF_ADDR 0
49: #define IICCF_SIZE 1
50:
51: #include "ipmi.h"
52:
53: struct iic_softc {
54: struct device sc_dev;
55: i2c_tag_t sc_tag;
56: };
57:
58: int iic_match(struct device *, void *, void *);
59: void iic_attach(struct device *, struct device *, void *);
60: int iic_search(struct device *, void *, void *);
61:
62: struct cfattach iic_ca = {
63: sizeof (struct iic_softc),
64: iic_match,
65: iic_attach
66: };
67:
68: struct cfdriver iic_cd = {
69: NULL, "iic", DV_DULL
70: };
71:
72: int
73: iicbus_print(void *aux, const char *pnp)
74: {
75: struct i2cbus_attach_args *iba = aux;
76:
77: if (pnp != NULL)
78: printf("%s at %s", iba->iba_name, pnp);
79:
80: return (UNCONF);
81: }
82:
83: int
84: iic_print(void *aux, const char *pnp)
85: {
86: struct i2c_attach_args *ia = aux;
87:
88: if (pnp != NULL)
89: printf("\"%s\" at %s", ia->ia_name, pnp);
90: printf(" addr 0x%x", ia->ia_addr);
91:
92: return (UNCONF);
93: }
94:
95: int
96: iic_search(struct device *parent, void *arg, void *aux)
97: {
98: struct iic_softc *sc = (void *) parent;
99: struct cfdata *cf = arg;
100: struct i2c_attach_args ia;
101:
102: if (cf->cf_loc[IICCF_ADDR] != -1) {
103: memset(&ia, 0, sizeof(ia));
104: ia.ia_tag = sc->sc_tag;
105: ia.ia_addr = cf->cf_loc[IICCF_ADDR];
106: ia.ia_size = cf->cf_loc[IICCF_SIZE];
107: ia.ia_name = "unknown";
108:
109: if (cf->cf_attach->ca_match(parent, cf, &ia) > 0)
110: config_attach(parent, cf, &ia, iic_print);
111: }
112: return (0);
113: }
114:
115: int
116: iic_match(struct device *parent, void *arg, void *aux)
117: {
118: struct cfdata *cf = arg;
119: struct i2cbus_attach_args *iba = aux;
120:
121: /* Just make sure we're looking for i2c. */
122: return (strcmp(iba->iba_name, cf->cf_driver->cd_name) == 0);
123: }
124:
125: void
126: iic_attach(struct device *parent, struct device *self, void *aux)
127: {
128: struct iic_softc *sc = (void *) self;
129: struct i2cbus_attach_args *iba = aux;
130:
131: sc->sc_tag = iba->iba_tag;
132:
133: #if NIPMI > 0
134: extern int ipmi_enabled;
135:
136: if (ipmi_enabled) {
137: printf(": disabled to avoid ipmi0 interactions\n");
138: return;
139: }
140: #endif
141:
142: printf("\n");
143:
144: /*
145: * Attach all i2c devices described in the kernel
146: * configuration file.
147: */
148: config_search(iic_search, self, NULL);
149:
150: /*
151: * Scan for known device signatures.
152: */
153: if (iba->iba_bus_scan)
154: (iba->iba_bus_scan)(self, aux, iba->iba_bus_scan_arg);
155: else
156: iic_scan(self, aux);
157: }
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