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
53static int smbus_match(device_t, cfdata_t, void *);
54static void smbus_attach(device_t, device_t, void *);
55static int smbus_print(void *, const char *);
56
57CFATTACH_DECL_NEW(smbus, 0,
58    smbus_match, smbus_attach, NULL, NULL);
59
60/* autoconfiguration match information for zbbus children */
61struct 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 */
67static const struct smbus_attach_locs smbus_devs[] = {
68	{ X1241_SMBUS_CHAN,	X1241_RTC_SLAVEADDR },
69	{ M41T81_SMBUS_CHAN,	M41T81_SLAVEADDR },
70};
71
72static int found = 0;
73
74static int
75smbus_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
82static void
83smbus_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
110static int
111smbus_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