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