1 /* $NetBSD: bonito_mainbus.c,v 1.6 2022/03/03 06:27:21 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: bonito_mainbus.c,v 1.6 2022/03/03 06:27:21 riastradh Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/conf.h>
38 #include <sys/reboot.h>
39 #include <sys/device.h>
40
41 #include <sys/bus.h>
42
43 #include <mips/cpuregs.h>
44 #include <mips/bonito/bonitoreg.h>
45
46 #include <evbmips/loongson/autoconf.h>
47 #include <evbmips/loongson/loongson_bus_defs.h>
48 #include <dev/pci/pcivar.h>
49
50 static int bonito_mainbus_match(device_t, cfdata_t, void *);
51 static void bonito_mainbus_attach(device_t, device_t, void *);
52
53 CFATTACH_DECL_NEW(bonito_mainbus, 0,
54 bonito_mainbus_match, bonito_mainbus_attach, NULL, NULL);
55
56 extern struct cfdriver bonito_cd;
57
58 int
bonito_mainbus_match(device_t parent,cfdata_t cf,void * aux)59 bonito_mainbus_match(device_t parent, cfdata_t cf, void *aux)
60 {
61 struct mainbus_attach_args * const maa = aux;
62
63 if (strcmp(maa->maa_name, bonito_cd.cd_name) == 0)
64 return (1);
65
66 return (0);
67 }
68
69 void
bonito_mainbus_attach(device_t parent,device_t self,void * aux)70 bonito_mainbus_attach(device_t parent, device_t self, void *aux)
71 {
72 struct pcibus_attach_args pba;
73 pcireg_t rev;
74 bool compatible;
75
76 device_set_private(self, __UNCONST(&sys_platform->bonito_config));
77
78 /*
79 * Loongson 2F processors do not use a real Bonito64 chip but
80 * their own derivative, which is no longer 100% compatible.
81 * We need to make sure we never try to access an unimplemented
82 * register...
83 */
84 if (loongson_ver >= 0x2f)
85 compatible = false;
86 else
87 compatible = true;
88
89 /*
90 * There is only one PCI controller on a Loongson chip.
91 */
92
93 rev = PCI_REVISION(REGVAL(BONITO_PCICLASS));
94 if (compatible) {
95 aprint_normal(": BONITO Memory and PCI controller,"
96 " %s rev. %d.%d\n", BONITO_REV_FPGA(rev) ? "FPGA" : "ASIC",
97 BONITO_REV_MAJOR(rev), BONITO_REV_MINOR(rev));
98 } else {
99 aprint_normal(": Memory and PCI-X controller, rev. %d\n",
100 PCI_REVISION(rev));
101 }
102
103 /*
104 * Attach PCI bus.
105 */
106
107 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY;
108 pba.pba_bus = 0;
109 pba.pba_bridgetag = NULL;
110
111 pba.pba_iot = &bonito_iot;
112 pba.pba_memt = &bonito_memt;
113 pba.pba_dmat = &bonito_dmat;
114 pba.pba_dmat64 = NULL;
115 pba.pba_pc = &bonito_pc;
116
117 config_found(self, &pba, pcibusprint, CFARGS_NONE);
118 }
119