xref: /netbsd-src/sys/arch/evbmips/malta/dev/mainbus.c (revision 3587d6f89c746bbb4f886219ddacd41ace480ecf)
1 /*	$NetBSD: mainbus.c,v 1.17 2021/08/07 16:18:51 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 1.17 2021/08/07 16:18:51 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 #if defined(PCI_NETBSD_CONFIGURE)
47 #include <sys/malloc.h>
48 #endif
49 
50 #include <dev/pci/pcivar.h>
51 #if defined(PCI_NETBSD_CONFIGURE)
52 #include <dev/pci/pciconf.h>
53 #endif
54 
55 #include <mips/cache.h>
56 #include <mips/cpuregs.h>
57 
58 #include <evbmips/malta/autoconf.h>
59 #include <evbmips/malta/maltareg.h>
60 #include <evbmips/malta/maltavar.h>
61 
62 #if defined(PCI_NETBSD_ENABLE_IDE)
63 #include <dev/pci/pciide_piix_reg.h>
64 #endif /* PCI_NETBSD_ENABLE_IDE */
65 
66 #include "locators.h"
67 #include "pci.h"
68 
69 static int	mainbus_match(device_t, cfdata_t, void *);
70 static void	mainbus_attach(device_t, device_t, void *);
71 static int	mainbus_submatch(device_t, cfdata_t, const int *, void *);
72 static int	mainbus_print(void *, const char *);
73 
74 CFATTACH_DECL_NEW(mainbus, 0,
75     mainbus_match, mainbus_attach, NULL, NULL);
76 
77 /* There can be only one. */
78 bool mainbus_found;
79 
80 struct mainbusdev {
81 	const char *md_name;
82 	bus_addr_t md_addr;
83 	int md_intr;
84 };
85 
86 const struct mainbusdev mainbusdevs[] = {
87 	{ "cpu",		-1,			-1 },
88 	{ "gt",			MALTA_CORECTRL_BASE,	-1 },
89 	{ "com",		MALTA_CBUSUART,		MALTA_CBUSUART_INTR },
90 	{ "i2c",		MALTA_I2C_BASE,		-1 },
91 	{ "gpio",		MALTA_GPIO_BASE,	-1 },
92 	{ NULL,			0,			0 },
93 };
94 
95 #define	PCI_IO_START	0x00001000
96 #define	PCI_IO_END	0x0000efff
97 #define	PCI_IO_SIZE	((PCI_IO_END - PCI_IO_START) + 1)
98 
99 #define	PCI_MEM_START	MALTA_PCIMEM1_BASE
100 #define	PCI_MEM_SIZE	MALTA_PCIMEM1_SIZE
101 
102 static int
103 mainbus_match(device_t parent, cfdata_t match, void *aux)
104 {
105 
106 	if (mainbus_found)
107 		return (0);
108 
109 	return (1);
110 }
111 
112 static void
113 mainbus_attach(device_t parent, device_t self, void *aux)
114 {
115 	struct mainbus_attach_args ma;
116 	const struct mainbusdev *md;
117 #if defined(PCI_NETBSD_ENABLE_IDE) || defined(PCI_NETBSD_CONFIGURE)
118 	struct malta_config *mcp = &malta_configuration;
119 	pci_chipset_tag_t pc = &mcp->mc_pc;
120 #endif
121 
122 	mainbus_found = true;
123 	printf("\n");
124 
125 #if defined(PCI_NETBSD_CONFIGURE)
126 	struct mips_cache_info * const mci = &mips_cache_info;
127 	struct pciconf_resources *pcires = pciconf_resource_init();
128 
129 	pciconf_resource_add(pcires, PCICONF_RESOURCE_IO,
130 	    PCI_IO_START, PCI_IO_SIZE);
131 	pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM,
132 	    PCI_MEM_START, PCI_MEM_SIZE);
133 
134 	pci_configure_bus(pc, pcires, 0, mci->mci_dcache_align);
135 	pciconf_resource_fini(pcires);
136 #endif /* PCI_NETBSD_CONFIGURE */
137 
138 #if defined(PCI_NETBSD_ENABLE_IDE)
139 	/*
140 	 * Perhaps PMON has not enabled the IDE controller.  Easy to
141 	 * fix -- just set the ENABLE bits for each channel in the
142 	 * IDETIM register.  Just clear all the bits for the channel
143 	 * except for the ENABLE bits -- the `pciide' driver will
144 	 * properly configure it later.
145 	 */
146 	pcireg_t idetim = 0;
147 	if (PCI_NETBSD_ENABLE_IDE & 0x01)
148 		idetim = PIIX_IDETIM_SET(idetim, PIIX_IDETIM_IDE, 0);
149 	if (PCI_NETBSD_ENABLE_IDE & 0x02)
150 		idetim = PIIX_IDETIM_SET(idetim, PIIX_IDETIM_IDE, 1);
151 
152 	/* pciide0 is pci device 10, function 1 */
153 	pcitag_t idetag = pci_make_tag(pc, 0, 10, 1);
154 	pci_conf_write(pc, idetag, PIIX_IDETIM, idetim);
155 #endif
156 	for (md = mainbusdevs; md->md_name != NULL; md++) {
157 		ma.ma_name = md->md_name;
158 		ma.ma_addr = md->md_addr;
159 		ma.ma_intr = md->md_intr;
160 		config_found(self, &ma, mainbus_print,
161 		    CFARGS(.submatch = mainbus_submatch));
162 	}
163 }
164 
165 static int
166 mainbus_submatch(device_t parent, cfdata_t cf,
167 		 const int *ldesc, void *aux)
168 {
169 	struct mainbus_attach_args *ma = aux;
170 
171 	if (cf->cf_loc[MAINBUSCF_ADDR] != MAINBUSCF_ADDR_DEFAULT &&
172 	    cf->cf_loc[MAINBUSCF_ADDR] != ma->ma_addr)
173 		return (0);
174 
175 	return (config_match(parent, cf, aux));
176 }
177 
178 static int
179 mainbus_print(void *aux, const char *pnp)
180 {
181 	struct mainbus_attach_args *ma = aux;
182 
183 	if (pnp != 0)
184 		return QUIET;
185 
186 	if (pnp)
187 		aprint_normal("%s at %s", ma->ma_name, pnp);
188 	if (ma->ma_addr != MAINBUSCF_ADDR_DEFAULT)
189 		aprint_normal(" addr 0x%lx", ma->ma_addr);
190 
191 	return (UNCONF);
192 }
193