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sbsmbus.c revision 1.10 
      1 /* $NetBSD: sbsmbus.c,v 1.10 2005/08/25 18:35:39 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 1.10 2005/08/25 18:35:39 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 locs[SMBUSCF_NLOCS];
     91 
     92 	found++;
     93 	printf("\n");
     94 
     95 	for (i = 0; i < smbus_dev_count; i++) {
     96 		if (self->dv_unit != smbus_devs[i].sa_interface)
     97 			continue;
     98 
     99 		memset(&sa, 0, sizeof sa);
    100 		sa.sa_interface = smbus_devs[i].sa_interface;
    101 		sa.sa_device = smbus_devs[i].sa_device;
    102 
    103 		locs[SMBUSCF_CHAN] = 0; /* XXX */
    104 		locs[SMBUSCF_DEV] = smbus_devs[i].sa_device;
    105 
    106 		config_found_sm_loc(self, "smbus", locs, &sa,
    107 				    smbus_print, smbus_submatch);
    108 	}
    109 }
    110 
    111 
    112 static int
    113 smbus_print(void *aux, const char *pnp)
    114 {
    115 	struct smbus_attach_args *sa = aux;
    116 
    117 	if (pnp)
    118 		aprint_normal("rtc0 at %s", pnp);	/* XXX! */
    119 	aprint_normal(" device 0x%x", sa->sa_device);
    120 
    121 	return (UNCONF);
    122 }
    123 
    124 static int
    125 smbus_submatch(struct device *parent, struct cfdata *cf,
    126 	       const locdesc_t *locs, void *aux)
    127 {
    128 
    129 	if (cf->cf_loc[SMBUSCF_CHAN] != SMBUSCF_CHAN_DEFAULT &&
    130 	    cf->cf_loc[SMBUSCF_CHAN] != locs[SMBUSCF_CHAN])
    131 		return (0);
    132 	if (cf->cf_loc[SMBUSCF_DEV] != SMBUSCF_DEV_DEFAULT &&
    133 	    cf->cf_loc[SMBUSCF_DEV] != locs[SMBUSCF_DEV])
    134 		return (0);
    135 
    136 	return (config_match(parent, cf, aux));
    137 }
    138