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sbsmbus.c revision 1.2 
      1 /* $NetBSD: sbsmbus.c,v 1.2 2002/09/27 03:17:59 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/param.h>
     39 #include <sys/device.h>
     40 #include <sys/systm.h>
     41 
     42 #include <machine/swarm.h>
     43 #include <mips/sibyte/dev/sbsmbusvar.h>
     44 
     45 #include "locators.h"
     46 
     47 static int smbus_match(struct device *, struct cfdata *, void *);
     48 static void smbus_attach(struct device *, struct device *, void *);
     49 static int smbus_print(void *, const char *);
     50 static int smbus_submatch(struct device *, struct cfdata *, void *);
     51 
     52 struct cfattach smbus_ca = {
     53 	sizeof(struct device), smbus_match, smbus_attach
     54 };
     55 
     56 /* autoconfiguration match information for zbbus children */
     57 struct smbus_attach_locs {
     58 	int	sa_interface;
     59 	int	sa_device;
     60 };
     61 
     62 /* XXX XXX this table should be imported from machine-specific code XXX XXX */
     63 static const struct smbus_attach_locs smbus_devs[] = {
     64 	{ X1240_SMBUS_CHAN,	X1240_RTC_SMBUS_DEV },
     65 };
     66 static const int smbus_dev_count = sizeof smbus_devs / sizeof smbus_devs[0];
     67 
     68 static int found = 0;
     69 
     70 static int
     71 smbus_match(struct device *parent, struct cfdata *match, void *aux)
     72 {
     73 
     74 	/* 2 SMBus's on the BCM112x and BCM1250 */
     75 	return (found < 2);
     76 }
     77 
     78 static void
     79 smbus_attach(struct device *parent, struct device *self, void *aux)
     80 {
     81 	struct smbus_attach_args sa;
     82 	int i;
     83 
     84 	found++;
     85 	printf("\n");
     86 
     87 	for (i = 0; i < smbus_dev_count; i++) {
     88 		if (self->dv_unit != smbus_devs[i].sa_interface)
     89 			continue;
     90 
     91 		memset(&sa, 0, sizeof sa);
     92 		sa.sa_interface = smbus_devs[i].sa_interface;
     93 		sa.sa_device = smbus_devs[i].sa_device;
     94 		config_found_sm(self, &sa, smbus_print, smbus_submatch);
     95 	}
     96 }
     97 
     98 
     99 static int
    100 smbus_print(void *aux, const char *pnp)
    101 {
    102 	struct smbus_attach_args *sa = aux;
    103 
    104 	if (pnp)
    105 		printf("rtc0 at %s", pnp);	/* XXX! */
    106 	printf(" device 0x%x", sa->sa_device);
    107 
    108 	return (UNCONF);
    109 }
    110 
    111 static int
    112 smbus_submatch(struct device *parent, struct cfdata *cf, void *aux)
    113 {
    114 	struct smbus_attach_args *sa = aux;
    115 
    116 	if (cf->cf_loc[SMBUSCF_DEV] != SMBUSCF_DEV_DEFAULT &&
    117 	    cf->cf_loc[SMBUSCF_DEV] != sa->sa_device)
    118 		return (0);
    119 
    120 	return (config_match(parent, cf, aux));
    121 }
    122