1 /* $Id: imx23_apbh.c,v 1.3 2021/08/07 16:18:44 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Petri Laakso.
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/param.h>
33 #include <sys/bus.h>
34 #include <sys/device.h>
35 #include <sys/errno.h>
36
37 #include <arm/mainbus/mainbus.h>
38
39 #include <arm/imx/imx23var.h>
40
41 #include "locators.h"
42
43 static int apbh_match(device_t, cfdata_t, void *);
44 static void apbh_attach(device_t, device_t, void *);
45 static int apbh_detach(device_t, int);
46 static int apbh_activate(device_t, enum devact);
47
48 static int apbh_search_cb(device_t, cfdata_t, const int *, void *);
49 static int apbh_search_crit_cb(device_t, cfdata_t, const int *, void *);
50 static int apbh_print(void *,const char *);
51
52 struct apbh_softc {
53 device_t sc_dev;
54 device_t dmac; /* DMA controller device for this bus. */
55 };
56
57 CFATTACH_DECL3_NEW(apbh,
58 sizeof(struct apbh_softc),
59 apbh_match,
60 apbh_attach,
61 apbh_detach,
62 apbh_activate,
63 NULL,
64 NULL,
65 0);
66
67 static int
apbh_match(device_t parent,cfdata_t match,void * aux)68 apbh_match(device_t parent, cfdata_t match, void *aux)
69 {
70 struct mainbus_attach_args *mb = aux;
71
72 if ((mb->mb_iobase == APBH_BASE) && (mb->mb_iosize == APBH_SIZE))
73 return 1;
74
75 return 0;
76 }
77
78 static void
apbh_attach(device_t parent,device_t self,void * aux)79 apbh_attach(device_t parent, device_t self, void *aux)
80 {
81 struct apb_attach_args aa;
82 static int apbh_attached = 0;
83
84 if (apbh_attached)
85 return;
86
87 aa.aa_iot = &imx23_bus_space;
88 aa.aa_dmat = &imx23_bus_dma_tag;
89
90 aprint_normal("\n");
91
92 config_search(self, &aa,
93 CFARGS(.search = apbh_search_crit_cb));
94 config_search(self, &aa,
95 CFARGS(.search = apbh_search_cb));
96
97 apbh_attached = 1;
98
99 return;
100 }
101
102 static int
apbh_detach(device_t self,int flags)103 apbh_detach(device_t self, int flags)
104 {
105 return 0;
106 }
107
108 static int
apbh_activate(device_t self,enum devact act)109 apbh_activate(device_t self, enum devact act)
110 {
111 return EOPNOTSUPP;
112 }
113
114 /*
115 * config_search_ia() callback function.
116 */
117 static int
apbh_search_cb(device_t parent,cfdata_t cf,const int * locs,void * aux)118 apbh_search_cb(device_t parent, cfdata_t cf, const int *locs, void *aux)
119 {
120 struct apb_attach_args *aa = aux;
121
122 aa->aa_name = cf->cf_name;
123 aa->aa_addr = cf->cf_loc[APBHCF_ADDR];
124 aa->aa_size = cf->cf_loc[APBHCF_SIZE];
125 aa->aa_irq = cf->cf_loc[APBHCF_IRQ];
126
127 if (config_probe(parent, cf, aux))
128 config_attach(parent, cf, aux, apbh_print, CFARGS_NONE);
129
130 return 0;
131 }
132
133 /*
134 * config_search_ia() callback function which only applies to critical devices.
135 */
136 static int
apbh_search_crit_cb(device_t parent,cfdata_t cf,const int * locs,void * aux)137 apbh_search_crit_cb(device_t parent, cfdata_t cf, const int *locs, void *aux)
138 {
139 struct apb_attach_args *aa = aux;
140
141 /* Return if not critical device. */
142 if ((strcmp(cf->cf_name, "icoll") != 0)
143 && (strcmp(cf->cf_name, "apbdma") != 0))
144 return 0;
145
146 aa->aa_name = cf->cf_name;
147 aa->aa_addr = cf->cf_loc[APBHCF_ADDR];
148 aa->aa_size = cf->cf_loc[APBHCF_SIZE];
149 aa->aa_irq = cf->cf_loc[APBHCF_IRQ];
150
151 if (config_probe(parent, cf, aux))
152 config_attach(parent, cf, aux, apbh_print, CFARGS_NONE);
153
154 return 0;
155 }
156
157 /*
158 * Called from config_attach()
159 */
160 static int
apbh_print(void * aux,const char * name __unused)161 apbh_print(void *aux, const char *name __unused)
162 {
163 struct apb_attach_args *aa = aux;
164
165 if (aa->aa_addr != APBHCF_ADDR_DEFAULT) {
166 aprint_normal(" addr 0x%lx", aa->aa_addr);
167 if (aa->aa_size > APBHCF_SIZE_DEFAULT)
168 aprint_normal("-0x%lx", aa->aa_addr + aa->aa_size-1);
169 }
170
171 if (aa->aa_irq != APBHCF_IRQ_DEFAULT)
172 aprint_normal(" irq %d", aa->aa_irq);
173
174 return UNCONF;
175 }
176