imx23_ahb.c revision 1.2 
1/* $Id: imx23_ahb.c,v 1.2 2021/04/24 23:36:27 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
43static int	ahb_match(device_t, cfdata_t, void *);
44static void	ahb_attach(device_t, device_t, void *);
45static int	ahb_detach(device_t, int);
46static int	ahb_activate(device_t, enum devact);
47
48static int	ahb_search_cb(device_t, cfdata_t, const int *, void *);
49static int	ahb_print(void *,const char *);
50
51CFATTACH_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
61static int
62ahb_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
72static void
73ahb_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	    CFARG_SEARCH, ahb_search_cb,
88	    CFARG_EOL);
89
90	ahb_attached = 1;
91
92	return;
93}
94
95static int
96ahb_detach(device_t self, int flags)
97{
98	return 0;
99}
100
101static int
102ahb_activate(device_t self, enum devact act)
103{
104	return EOPNOTSUPP;
105}
106
107/*
108 * config_search_ia() callback function.
109 */
110static int
111ahb_search_cb(device_t parent, cfdata_t cf, const int *locs, void *aux)
112{
113	struct apb_attach_args *aa = aux;
114
115	aa->aa_name = cf->cf_name;
116	aa->aa_addr = cf->cf_loc[AHBCF_ADDR];
117	aa->aa_size = cf->cf_loc[AHBCF_SIZE];
118	aa->aa_irq = cf->cf_loc[AHBCF_IRQ];
119
120	if (config_probe(parent, cf, aux))
121		config_attach(parent, cf, aux, ahb_print, CFARG_EOL);
122
123	return 0;
124}
125
126/*
127 * Called from config_attach()
128 */
129static int
130ahb_print(void *aux, const char *name __unused)
131{
132	struct apb_attach_args *aa = aux;
133
134	if (aa->aa_addr != AHBCF_ADDR_DEFAULT) {
135		aprint_normal(" addr 0x%lx", aa->aa_addr);
136		if (aa->aa_size > AHBCF_SIZE_DEFAULT)
137			aprint_normal("-0x%lx", aa->aa_addr + aa->aa_size-1);
138	}
139
140	if (aa->aa_irq != AHBCF_IRQ_DEFAULT)
141		aprint_normal(" irq %d", aa->aa_irq);
142
143	return UNCONF;
144}
145