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      1 /*	$NetBSD: mainbus.c,v 1.7 2023/12/20 14:12:25 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: mainbus.c,v 1.7 2023/12/20 14:12:25 thorpej Exp $");
     40 
     41 #include "opt_pci.h"
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/device.h>
     46 
     47 #include <dev/pci/pcivar.h>
     48 #if defined(PCI_NETBSD_CONFIGURE)
     49 #include <dev/pci/pciconf.h>
     50 #endif
     51 
     52 #include <mips/cache.h>
     53 #include <mips/cpuregs.h>
     54 
     55 #include <mips/bonito/bonitoreg.h>
     56 
     57 #include <evbmips/loongson/autoconf.h>
     58 #if defined(PCI_NETBSD_CONFIGURE)
     59 #include <evbmips/loongson/loongson_bus_defs.h>
     60 #endif
     61 
     62 #include "locators.h"
     63 #include "pci.h"
     64 
     65 static int	mainbus_match(device_t, cfdata_t, void *);
     66 static void	mainbus_attach(device_t, device_t, void *);
     67 static int	mainbus_print(void *, const char *);
     68 
     69 CFATTACH_DECL_NEW(mainbus, 0,
     70     mainbus_match, mainbus_attach, NULL, NULL);
     71 
     72 /* There can be only one. */
     73 static bool mainbus_found;
     74 
     75 const char * const mainbusdevs[] = {
     76 	"cpu",
     77 	"bonito",
     78 #if 0
     79 	"i2c",
     80 	"gpio",
     81 #endif
     82 };
     83 
     84 #define	PCI_IO_START	0x00001000
     85 #define	PCI_IO_END	0x00003fff
     86 #define	PCI_IO_SIZE	((PCI_IO_END - PCI_IO_START) + 1)
     87 
     88 #define	PCI_MEM_START	0
     89 #define	PCI_MEM_SIZE	BONITO_PCILO_SIZE
     90 
     91 static int
     92 mainbus_match(device_t parent, cfdata_t match, void *aux)
     93 {
     94 	if (mainbus_found)
     95 		return (0);
     96 
     97 	return (1);
     98 }
     99 
    100 static void
    101 mainbus_attach(device_t parent, device_t self, void *aux)
    102 {
    103 	size_t i;
    104 
    105 	mainbus_found = true;
    106 	aprint_normal("\n");
    107 
    108 #if defined(PCI_NETBSD_CONFIGURE)
    109 	struct mips_cache_info * const mci = &mips_cache_info;
    110 	struct pciconf_resources *pcires = pciconf_resource_init();
    111 
    112 	pciconf_resource_add(pcires, PCICONF_RESOURCE_IO,
    113 	    PCI_IO_START, PCI_IO_SIZE);
    114 	pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM,
    115 	    PCI_MEM_START, PCI_MEM_SIZE);
    116 
    117 	pci_configure_bus(&bonito_pc, pcires, 0, mci->mci_dcache_align);
    118 	pciconf_resource_fini(pcires);
    119 #endif /* PCI_NETBSD_CONFIGURE */
    120 
    121 	for (i = 0; i < __arraycount(mainbusdevs); i++) {
    122 		struct mainbus_attach_args maa;
    123 		maa.maa_name = mainbusdevs[i];
    124 		(void) config_found(self, &maa, mainbus_print, CFARGS_NONE);
    125 	}
    126 }
    127 
    128 static int
    129 mainbus_print(void *aux, const char *pnp)
    130 {
    131 	struct mainbus_attach_args *maa = aux;
    132 
    133 	if (pnp)
    134 		aprint_normal("%s at %s", maa->maa_name, pnp);
    135 
    136 	return UNCONF;
    137 }
    138