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      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 
     53 static int smbus_match(device_t, cfdata_t, void *);
     54 static void smbus_attach(device_t, device_t, void *);
     55 static int smbus_print(void *, const char *);
     56 
     57 CFATTACH_DECL_NEW(smbus, 0,
     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 
     72 static int found = 0;
     73 
     74 static int
     75 smbus_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 
     82 static void
     83 smbus_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 
    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 }
    121