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
43static int	apbh_match(device_t, cfdata_t, void *);
44static void	apbh_attach(device_t, device_t, void *);
45static int	apbh_detach(device_t, int);
46static int	apbh_activate(device_t, enum devact);
47
48static int	apbh_search_cb(device_t, cfdata_t, const int *, void *);
49static int	apbh_search_crit_cb(device_t, cfdata_t, const int *, void *);
50static int	apbh_print(void *,const char *);
51
52struct apbh_softc {
53	device_t	sc_dev;
54	device_t	dmac; /* DMA controller device for this bus. */
55};
56
57CFATTACH_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
67static int
68apbh_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
78static void
79apbh_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
102static int
103apbh_detach(device_t self, int flags)
104{
105	return 0;
106}
107
108static int
109apbh_activate(device_t self, enum devact act)
110{
111	return EOPNOTSUPP;
112}
113
114/*
115 * config_search_ia() callback function.
116 */
117static int
118apbh_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 */
136static int
137apbh_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 */
160static int
161apbh_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