sys/arch/mips/sibyte/dev/sbsmbus.c

   1 /* $NetBSD: sbsmbus.c,v 1.12 2005/12/11 12:18:13 christos 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 1.12 2005/12/11 12:18:13 christos 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
  57 CFATTACH_DECL(smbus, sizeof(struct device),
  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 static const int smbus_dev_count = sizeof smbus_devs / sizeof smbus_devs[0];
  72
  73 static int found = 0;
  74
  75 static int
  76 smbus_match(struct device *parent, struct cfdata *match, void *aux)
  77 {
  78
  79         /* 2 SMBus's on the BCM112x and BCM1250 */
  80         return (found < 2);
  81 }
  82
  83 static void
  84 smbus_attach(struct device *parent, struct device *self, void *aux)
  85 {
  86         struct smbus_attach_args sa;
  87         int i;
  88         int locs[SMBUSCF_NLOCS];
  89
  90         found++;
  91         printf("\n");
  92
  93         for (i = 0; i < smbus_dev_count; i++) {
  94                 if (device_unit(self) != smbus_devs[i].sa_interface)
  95                         continue;
  96
  97                 memset(&sa, 0, sizeof sa);
  98                 sa.sa_interface = smbus_devs[i].sa_interface;
  99                 sa.sa_device = smbus_devs[i].sa_device;
 100
 101                 locs[SMBUSCF_CHAN] = 0; /* XXX */
 102                 locs[SMBUSCF_DEV] = smbus_devs[i].sa_device;
 103
 104                 config_found_sm_loc(self, "smbus", locs, &sa,
 105                                     smbus_print, config_stdsubmatch);
 106         }
 107 }
 108
 109
 110 static int
 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 }