1 /* $NetBSD: sbsmbus.c,v 1.9 2004/09/13 14:57:31 drochner 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 1.9 2004/09/13 14:57:31 drochner Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/device.h> 43 #include <sys/systm.h> 44 45 #include <machine/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(struct device *, struct cfdata *, void *); 54 static void smbus_attach(struct device *, struct device *, void *); 55 static int smbus_print(void *, const char *); 56 static int smbus_submatch(struct device *, struct cfdata *, 57 const locdesc_t *, void *); 58 59 CFATTACH_DECL(smbus, sizeof(struct device), 60 smbus_match, smbus_attach, NULL, NULL); 61 62 /* autoconfiguration match information for zbbus children */ 63 struct smbus_attach_locs { 64 int sa_interface; 65 int sa_device; 66 }; 67 68 /* XXX XXX this table should be imported from machine-specific code XXX XXX */ 69 static const struct smbus_attach_locs smbus_devs[] = { 70 { X1241_SMBUS_CHAN, X1241_RTC_SLAVEADDR }, 71 { M41T81_SMBUS_CHAN, M41T81_SLAVEADDR }, 72 }; 73 static const int smbus_dev_count = sizeof smbus_devs / sizeof smbus_devs[0]; 74 75 static int found = 0; 76 77 static int 78 smbus_match(struct device *parent, struct cfdata *match, void *aux) 79 { 80 81 /* 2 SMBus's on the BCM112x and BCM1250 */ 82 return (found < 2); 83 } 84 85 static void 86 smbus_attach(struct device *parent, struct device *self, void *aux) 87 { 88 struct smbus_attach_args sa; 89 int i; 90 int help[3]; 91 locdesc_t *ldesc = (void *)help; /* XXX */ 92 93 found++; 94 printf("\n"); 95 96 for (i = 0; i < smbus_dev_count; i++) { 97 if (self->dv_unit != smbus_devs[i].sa_interface) 98 continue; 99 100 memset(&sa, 0, sizeof sa); 101 sa.sa_interface = smbus_devs[i].sa_interface; 102 sa.sa_device = smbus_devs[i].sa_device; 103 104 ldesc->len = 2; 105 ldesc->locs[SMBUSCF_CHAN] = 0; /* XXX */ 106 ldesc->locs[SMBUSCF_DEV] = smbus_devs[i].sa_device; 107 108 config_found_sm_loc(self, "smbus", ldesc, &sa, 109 smbus_print, smbus_submatch); 110 } 111 } 112 113 114 static int 115 smbus_print(void *aux, const char *pnp) 116 { 117 struct smbus_attach_args *sa = aux; 118 119 if (pnp) 120 aprint_normal("rtc0 at %s", pnp); /* XXX! */ 121 aprint_normal(" device 0x%x", sa->sa_device); 122 123 return (UNCONF); 124 } 125 126 static int 127 smbus_submatch(struct device *parent, struct cfdata *cf, 128 const locdesc_t *ldesc, void *aux) 129 { 130 131 if (cf->cf_loc[SMBUSCF_CHAN] != SMBUSCF_CHAN_DEFAULT && 132 cf->cf_loc[SMBUSCF_CHAN] != ldesc->locs[SMBUSCF_CHAN]) 133 return (0); 134 if (cf->cf_loc[SMBUSCF_DEV] != SMBUSCF_DEV_DEFAULT && 135 cf->cf_loc[SMBUSCF_DEV] != ldesc->locs[SMBUSCF_DEV]) 136 return (0); 137 138 return (config_match(parent, cf, aux)); 139 } 140