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      1 /* $NetBSD: zbbus.c,v 1.4 2021/08/07 16:18:52 thorpej Exp $ */
      2 
      3 /*
      4  * Copyright 2000, 2001
      5  * Broadcom Corporation. All rights reserved.
      6  *
      7  * This software is furnished under license and may be used and copied only
      8  * in accordance with the following terms and conditions.  Subject to these
      9  * conditions, you may download, copy, install, use, modify and distribute
     10  * modified or unmodified copies of this software in source and/or binary
     11  * form. No title or ownership is transferred hereby.
     12  *
     13  * 1) Any source code used, modified or distributed must reproduce and
     14  *    retain this copyright notice and list of conditions as they appear in
     15  *    the source file.
     16  *
     17  * 2) No right is granted to use any trade name, trademark, or logo of
     18  *    Broadcom Corporation.  The "Broadcom Corporation" name may not be
     19  *    used to endorse or promote products derived from this software
     20  *    without the prior written permission of Broadcom Corporation.
     21  *
     22  * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
     23  *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
     24  *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
     25  *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
     26  *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
     27  *    LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
     30  *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     31  *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     32  *    OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: zbbus.c,v 1.4 2021/08/07 16:18:52 thorpej Exp $");
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/device.h>
     41 
     42 #include <mips/sibyte/include/zbbusvar.h>
     43 
     44 #include <evbmips/sbmips/systemsw.h>
     45 
     46 #include "locators.h"
     47 
     48 static int	zbbus_match(device_t, cfdata_t, void *);
     49 static void	zbbus_attach(device_t, device_t, void *);
     50 
     51 CFATTACH_DECL_NEW(zbbus, 0,
     52     zbbus_match, zbbus_attach, NULL, NULL);
     53 
     54 static int	zbbus_print(void *, const char *);
     55 static int	zbbus_submatch(device_t, cfdata_t, const int *, void *);
     56 static const char *zbbus_entity_type_name(enum zbbus_entity_type type);
     57 
     58 static int	zbbus_attached;
     59 
     60 static const struct zbbus_attach_locs sb1250_zbbus_devs[] = {
     61 	{	0, 	ZBBUS_ENTTYPE_CPU	},
     62 	{	1, 	ZBBUS_ENTTYPE_CPU	},
     63 	{	4, 	ZBBUS_ENTTYPE_SCD	},
     64 	{	2, 	ZBBUS_ENTTYPE_BRZ	},
     65 	{	3, 	ZBBUS_ENTTYPE_OBIO	},
     66 };
     67 static const int sb1250_zbbus_dev_count =
     68     sizeof sb1250_zbbus_devs / sizeof sb1250_zbbus_devs[0];
     69 
     70 static int
     71 zbbus_match(device_t parent, cfdata_t match, void *aux)
     72 {
     73 
     74 	if (zbbus_attached)
     75 		return (0);
     76 	return 1;
     77 }
     78 
     79 static void
     80 zbbus_attach(device_t parent, device_t self, void *aux)
     81 {
     82 	struct zbbus_attach_args za;
     83 	int i;
     84 
     85 	printf("\n");
     86 	zbbus_attached = 1;
     87 
     88 	sb1250_icu_init();
     89 
     90 	for (i = 0; i < sb1250_zbbus_dev_count; i++) {
     91 		memset(&za, 0, sizeof za);
     92 		za.za_locs = sb1250_zbbus_devs[i];
     93 		config_found(self, &za, zbbus_print,
     94 		    CFARGS(.submatch = zbbus_submatch));
     95 	}
     96 
     97 	return;
     98 }
     99 
    100 int
    101 zbbus_print(void *aux, const char *pnp)
    102 {
    103 	struct zbbus_attach_args *zap = aux;
    104 
    105 	if (pnp)
    106 		aprint_normal("%s at %s",
    107 		    zbbus_entity_type_name(zap->za_locs.za_type), pnp);
    108 	aprint_normal(" busid %d", zap->za_locs.za_busid);
    109 	return (UNCONF);
    110 }
    111 
    112 static int
    113 zbbus_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
    114 {
    115 	struct zbbus_attach_args *zap = aux;
    116 
    117 	if (cf->cf_loc[ZBBUSCF_BUSID] != ZBBUSCF_BUSID_DEFAULT &&
    118 	    cf->cf_loc[ZBBUSCF_BUSID] != zap->za_locs.za_busid)
    119 		return (0);
    120 
    121 	return (config_match(parent, cf, aux));
    122 }
    123 
    124 static const char *
    125 zbbus_entity_type_name(enum zbbus_entity_type type)
    126 {
    127 
    128 	switch (type) {
    129 	case ZBBUS_ENTTYPE_CPU:
    130 		return ("cpu");
    131 	case ZBBUS_ENTTYPE_SCD:
    132 		return ("sbscd");
    133 	case ZBBUS_ENTTYPE_BRZ:
    134 		return ("sbbrz");
    135 	case ZBBUS_ENTTYPE_OBIO:
    136 		return ("sbobio");
    137 	}
    138 	panic("zbbus_entity_type_name");
    139 	return ("panic");
    140 }
    141