1 /* $Id: imx23_ahb.c,v 1.3 2021/08/07 16:18:44 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2013 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 ahb_match(device_t, cfdata_t, void *);
44 static void ahb_attach(device_t, device_t, void *);
45 static int ahb_detach(device_t, int);
46 static int ahb_activate(device_t, enum devact);
47
48 static int ahb_search_cb(device_t, cfdata_t, const int *, void *);
49 static int ahb_print(void *,const char *);
50
51 CFATTACH_DECL3_NEW(ahb,
52 sizeof(struct ahb_softc),
53 ahb_match,
54 ahb_attach,
55 ahb_detach,
56 ahb_activate,
57 NULL,
58 NULL,
59 0);
60
61 static int
ahb_match(device_t parent,cfdata_t match,void * aux)62 ahb_match(device_t parent, cfdata_t match, void *aux)
63 {
64 struct mainbus_attach_args *mb = aux;
65
66 if ((mb->mb_iobase == AHB_BASE) && (mb->mb_iosize == AHB_SIZE))
67 return 1;
68
69 return 0;
70 }
71
72 static void
ahb_attach(device_t parent,device_t self,void * aux)73 ahb_attach(device_t parent, device_t self, void *aux)
74 {
75 struct ahb_attach_args aa;
76 static int ahb_attached = 0;
77
78 if (ahb_attached)
79 return;
80
81 aa.aa_iot = &imx23_bus_space;
82 aa.aa_dmat = &imx23_bus_dma_tag;
83
84 aprint_normal("\n");
85
86 config_search(self, &aa,
87 CFARGS(.search = ahb_search_cb));
88
89 ahb_attached = 1;
90
91 return;
92 }
93
94 static int
ahb_detach(device_t self,int flags)95 ahb_detach(device_t self, int flags)
96 {
97 return 0;
98 }
99
100 static int
ahb_activate(device_t self,enum devact act)101 ahb_activate(device_t self, enum devact act)
102 {
103 return EOPNOTSUPP;
104 }
105
106 /*
107 * config_search_ia() callback function.
108 */
109 static int
ahb_search_cb(device_t parent,cfdata_t cf,const int * locs,void * aux)110 ahb_search_cb(device_t parent, cfdata_t cf, const int *locs, void *aux)
111 {
112 struct apb_attach_args *aa = aux;
113
114 aa->aa_name = cf->cf_name;
115 aa->aa_addr = cf->cf_loc[AHBCF_ADDR];
116 aa->aa_size = cf->cf_loc[AHBCF_SIZE];
117 aa->aa_irq = cf->cf_loc[AHBCF_IRQ];
118
119 if (config_probe(parent, cf, aux))
120 config_attach(parent, cf, aux, ahb_print, CFARGS_NONE);
121
122 return 0;
123 }
124
125 /*
126 * Called from config_attach()
127 */
128 static int
ahb_print(void * aux,const char * name __unused)129 ahb_print(void *aux, const char *name __unused)
130 {
131 struct apb_attach_args *aa = aux;
132
133 if (aa->aa_addr != AHBCF_ADDR_DEFAULT) {
134 aprint_normal(" addr 0x%lx", aa->aa_addr);
135 if (aa->aa_size > AHBCF_SIZE_DEFAULT)
136 aprint_normal("-0x%lx", aa->aa_addr + aa->aa_size-1);
137 }
138
139 if (aa->aa_irq != AHBCF_IRQ_DEFAULT)
140 aprint_normal(" irq %d", aa->aa_irq);
141
142 return UNCONF;
143 }
144