1 /* $NetBSD: sbsmbus.c,v 1.19 2021/08/07 16:18:59 thorpej Exp $ */
2
3 /*
4 * Copyright 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: sbsmbus.c,v 1.19 2021/08/07 16:18:59 thorpej Exp $");
40
41 #include <sys/param.h>
42 #include <sys/device.h>
43 #include <sys/systm.h>
44
45 #include <evbmips/sbmips/swarm.h>
46 #include <mips/sibyte/dev/sbsmbusvar.h>
47
48 #include <dev/smbus/x1241reg.h>
49 #include <dev/smbus/m41t81reg.h>
50
51 #include "locators.h"
52
53 static int smbus_match(device_t, cfdata_t, void *);
54 static void smbus_attach(device_t, device_t, void *);
55 static int smbus_print(void *, const char *);
56
57 CFATTACH_DECL_NEW(smbus, 0,
58 smbus_match, smbus_attach, NULL, NULL);
59
60 /* autoconfiguration match information for zbbus children */
61 struct smbus_attach_locs {
62 int sa_interface;
63 int sa_device;
64 };
65
66 /* XXX XXX this table should be imported from machine-specific code XXX XXX */
67 static const struct smbus_attach_locs smbus_devs[] = {
68 { X1241_SMBUS_CHAN, X1241_RTC_SLAVEADDR },
69 { M41T81_SMBUS_CHAN, M41T81_SLAVEADDR },
70 };
71
72 static int found = 0;
73
74 static int
smbus_match(device_t parent,cfdata_t match,void * aux)75 smbus_match(device_t parent, cfdata_t match, void *aux)
76 {
77
78 /* 2 SMBus's on the BCM112x and BCM1250 */
79 return (found < 2);
80 }
81
82 static void
smbus_attach(device_t parent,device_t self,void * aux)83 smbus_attach(device_t parent, device_t self, void *aux)
84 {
85 struct smbus_attach_args sa;
86 int i;
87 int locs[SMBUSCF_NLOCS];
88
89 found++;
90 aprint_normal("\n");
91
92 for (i = 0; i < __arraycount(smbus_devs); i++) {
93 if (device_unit(self) != smbus_devs[i].sa_interface)
94 continue;
95
96 memset(&sa, 0, sizeof sa);
97 sa.sa_interface = smbus_devs[i].sa_interface;
98 sa.sa_device = smbus_devs[i].sa_device;
99
100 locs[SMBUSCF_CHAN] = 0; /* XXX */
101 locs[SMBUSCF_DEV] = smbus_devs[i].sa_device;
102
103 config_found(self, &sa, smbus_print,
104 CFARGS(.submatch = config_stdsubmatch,
105 .locators = locs));
106 }
107 }
108
109
110 static int
smbus_print(void * aux,const char * pnp)111 smbus_print(void *aux, const char *pnp)
112 {
113 struct smbus_attach_args *sa = aux;
114
115 if (pnp)
116 aprint_normal("rtc0 at %s", pnp); /* XXX! */
117 aprint_normal(" device 0x%x", sa->sa_device);
118
119 return (UNCONF);
120 }
121