1 /* $NetBSD: mainbus.c,v 1.18 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 1.18 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 <evbmips/malta/autoconf.h>
56 #include <evbmips/malta/maltareg.h>
57 #include <evbmips/malta/maltavar.h>
58
59 #if defined(PCI_NETBSD_ENABLE_IDE)
60 #include <dev/pci/pciide_piix_reg.h>
61 #endif /* PCI_NETBSD_ENABLE_IDE */
62
63 #include "locators.h"
64 #include "pci.h"
65
66 static int mainbus_match(device_t, cfdata_t, void *);
67 static void mainbus_attach(device_t, device_t, void *);
68 static int mainbus_submatch(device_t, cfdata_t, const int *, void *);
69 static int mainbus_print(void *, const char *);
70
71 CFATTACH_DECL_NEW(mainbus, 0,
72 mainbus_match, mainbus_attach, NULL, NULL);
73
74 /* There can be only one. */
75 bool mainbus_found;
76
77 struct mainbusdev {
78 const char *md_name;
79 bus_addr_t md_addr;
80 int md_intr;
81 };
82
83 const struct mainbusdev mainbusdevs[] = {
84 { "cpu", -1, -1 },
85 { "gt", MALTA_CORECTRL_BASE, -1 },
86 { "com", MALTA_CBUSUART, MALTA_CBUSUART_INTR },
87 { "i2c", MALTA_I2C_BASE, -1 },
88 { "gpio", MALTA_GPIO_BASE, -1 },
89 { NULL, 0, 0 },
90 };
91
92 #define PCI_IO_START 0x00001000
93 #define PCI_IO_END 0x0000efff
94 #define PCI_IO_SIZE ((PCI_IO_END - PCI_IO_START) + 1)
95
96 #define PCI_MEM_START MALTA_PCIMEM1_BASE
97 #define PCI_MEM_SIZE MALTA_PCIMEM1_SIZE
98
99 static int
mainbus_match(device_t parent,cfdata_t match,void * aux)100 mainbus_match(device_t parent, cfdata_t match, void *aux)
101 {
102
103 if (mainbus_found)
104 return (0);
105
106 return (1);
107 }
108
109 static void
mainbus_attach(device_t parent,device_t self,void * aux)110 mainbus_attach(device_t parent, device_t self, void *aux)
111 {
112 struct mainbus_attach_args ma;
113 const struct mainbusdev *md;
114 #if defined(PCI_NETBSD_ENABLE_IDE) || defined(PCI_NETBSD_CONFIGURE)
115 struct malta_config *mcp = &malta_configuration;
116 pci_chipset_tag_t pc = &mcp->mc_pc;
117 #endif
118
119 mainbus_found = true;
120 printf("\n");
121
122 #if defined(PCI_NETBSD_CONFIGURE)
123 struct mips_cache_info * const mci = &mips_cache_info;
124 struct pciconf_resources *pcires = pciconf_resource_init();
125
126 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO,
127 PCI_IO_START, PCI_IO_SIZE);
128 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM,
129 PCI_MEM_START, PCI_MEM_SIZE);
130
131 pci_configure_bus(pc, pcires, 0, mci->mci_dcache_align);
132 pciconf_resource_fini(pcires);
133 #endif /* PCI_NETBSD_CONFIGURE */
134
135 #if defined(PCI_NETBSD_ENABLE_IDE)
136 /*
137 * Perhaps PMON has not enabled the IDE controller. Easy to
138 * fix -- just set the ENABLE bits for each channel in the
139 * IDETIM register. Just clear all the bits for the channel
140 * except for the ENABLE bits -- the `pciide' driver will
141 * properly configure it later.
142 */
143 pcireg_t idetim = 0;
144 if (PCI_NETBSD_ENABLE_IDE & 0x01)
145 idetim = PIIX_IDETIM_SET(idetim, PIIX_IDETIM_IDE, 0);
146 if (PCI_NETBSD_ENABLE_IDE & 0x02)
147 idetim = PIIX_IDETIM_SET(idetim, PIIX_IDETIM_IDE, 1);
148
149 /* pciide0 is pci device 10, function 1 */
150 pcitag_t idetag = pci_make_tag(pc, 0, 10, 1);
151 pci_conf_write(pc, idetag, PIIX_IDETIM, idetim);
152 #endif
153 for (md = mainbusdevs; md->md_name != NULL; md++) {
154 ma.ma_name = md->md_name;
155 ma.ma_addr = md->md_addr;
156 ma.ma_intr = md->md_intr;
157 config_found(self, &ma, mainbus_print,
158 CFARGS(.submatch = mainbus_submatch));
159 }
160 }
161
162 static int
mainbus_submatch(device_t parent,cfdata_t cf,const int * ldesc,void * aux)163 mainbus_submatch(device_t parent, cfdata_t cf,
164 const int *ldesc, void *aux)
165 {
166 struct mainbus_attach_args *ma = aux;
167
168 if (cf->cf_loc[MAINBUSCF_ADDR] != MAINBUSCF_ADDR_DEFAULT &&
169 cf->cf_loc[MAINBUSCF_ADDR] != ma->ma_addr)
170 return (0);
171
172 return (config_match(parent, cf, aux));
173 }
174
175 static int
mainbus_print(void * aux,const char * pnp)176 mainbus_print(void *aux, const char *pnp)
177 {
178 struct mainbus_attach_args *ma = aux;
179
180 if (pnp != 0)
181 return QUIET;
182
183 if (pnp)
184 aprint_normal("%s at %s", ma->ma_name, pnp);
185 if (ma->ma_addr != MAINBUSCF_ADDR_DEFAULT)
186 aprint_normal(" addr 0x%lx", ma->ma_addr);
187
188 return (UNCONF);
189 }
190