1/*-
2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37#include <sys/bus.h>
38
39#include <machine/intr_machdep.h>
40
41#include <dev/ofw/ofw_bus.h>
42#include <dev/ofw/ofw_bus_subr.h>
43#include <dev/ofw/openfirm.h>
44
45#include "ofw_bus_if.h"
46#include "fdt_common.h"
47
48static void
49fdt_fixup_busfreq(phandle_t root, uint32_t div)
50{
51	phandle_t sb, cpus, child;
52	pcell_t freq;
53
54	/*
55	 * Do a strict check so as to skip non-SOC nodes, which also claim
56	 * simple-bus compatibility such as eLBC etc.
57	 */
58	if ((sb = fdt_find_compatible(root, "simple-bus", 1)) == 0)
59		return;
60
61	/*
62	 * This fixup uses /cpus/ bus-frequency prop value to set simple-bus
63	 * bus-frequency property.
64	 */
65	if ((cpus = OF_finddevice("/cpus")) == -1)
66		return;
67
68	if ((child = OF_child(cpus)) == 0)
69		return;
70
71	if (OF_getprop(child, "bus-frequency", (void *)&freq,
72	    sizeof(freq)) <= 0)
73		return;
74
75	if (div == 0)
76		return;
77
78	freq /= div;
79
80	OF_setprop(sb, "bus-frequency", (void *)&freq, sizeof(freq));
81}
82
83static void
84fdt_fixup_busfreq_mpc85xx(phandle_t root)
85{
86
87	fdt_fixup_busfreq(root, 1);
88}
89
90static void
91fdt_fixup_busfreq_dpaa(phandle_t root)
92{
93
94	fdt_fixup_busfreq(root, 2);
95}
96
97static void
98fdt_fixup_fman(phandle_t root)
99{
100	phandle_t node;
101	pcell_t freq;
102
103	if ((node = fdt_find_compatible(root, "simple-bus", 1)) == 0)
104		return;
105
106	if (OF_getprop(node, "bus-frequency", (void *)&freq,
107	    sizeof(freq)) <= 0)
108		return;
109
110	/*
111	 * Set clock-frequency for FMan nodes (only on QorIQ DPAA targets).
112	 * That frequency is equal to /soc node bus-frequency.
113	 */
114	for (node = OF_child(node); node != 0; node = OF_peer(node)) {
115		if (fdt_is_compatible(node, "fsl,fman") == 0)
116			continue;
117
118		if (OF_setprop(node, "clock-frequency", (void *)&freq,
119		    sizeof(freq)) == -1) {
120			/*
121			 * XXX Shall we take some actions if no clock-frequency
122			 * property was found?
123			 */
124		}
125	}
126}
127
128struct fdt_fixup_entry fdt_fixup_table[] = {
129	{ "fsl,MPC8572DS", &fdt_fixup_busfreq_mpc85xx },
130	{ "MPC8555CDS", &fdt_fixup_busfreq_mpc85xx },
131	{ "fsl,P2020", &fdt_fixup_busfreq_mpc85xx },
132	{ "fsl,P2041RDB", &fdt_fixup_busfreq_dpaa },
133	{ "fsl,P2041RDB", &fdt_fixup_fman },
134	{ "fsl,P3041DS", &fdt_fixup_busfreq_dpaa },
135	{ "fsl,P3041DS", &fdt_fixup_fman },
136	{ "fsl,P5020DS", &fdt_fixup_busfreq_dpaa },
137	{ "fsl,P5020DS", &fdt_fixup_fman },
138	{ "varisys,CYRUS", &fdt_fixup_busfreq_dpaa },
139	{ "varisys,CYRUS", &fdt_fixup_fman },
140	{ NULL, NULL }
141};
142
143