1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2013 John Crispin <john@phrozen.org>
*/
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/sizes.h>
#include <linux/of_fdt.h>
#include <linux/kernel.h>
#include <linux/memblock.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/reboot.h>
#include <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <asm/prom.h>
#include <asm/mach-ralink/ralink_regs.h>
#include "common.h"
__iomem void *rt_sysc_membase;
__iomem void *rt_memc_membase;
EXPORT_SYMBOL_GPL(rt_sysc_membase);
static const struct of_device_id mtmips_memc_match[] = {
{ .compatible = "mediatek,mt7621-memc" },
{ .compatible = "ralink,mt7620a-memc" },
{ .compatible = "ralink,rt2880-memc" },
{ .compatible = "ralink,rt3050-memc" },
{ .compatible = "ralink,rt3883-memc" },
{}
};
static const struct of_device_id mtmips_sysc_match[] = {
{ .compatible = "mediatek,mt7621-sysc" },
{ .compatible = "ralink,mt7620-sysc" },
{ .compatible = "ralink,mt7628-sysc" },
{ .compatible = "ralink,mt7688-sysc" },
{ .compatible = "ralink,rt2880-sysc" },
{ .compatible = "ralink,rt3050-sysc" },
{ .compatible = "ralink,rt3052-sysc" },
{ .compatible = "ralink,rt3352-sysc" },
{ .compatible = "ralink,rt3883-sysc" },
{ .compatible = "ralink,rt5350-sysc" },
{}
};
static __iomem void *
mtmips_of_remap_node(const struct of_device_id *match, const char *type)
{
struct resource res;
struct device_node *np;
np = of_find_matching_node(NULL, match);
if (!np)
panic("Failed to find %s controller node", type);
if (of_address_to_resource(np, 0, &res))
panic("Failed to get resource for %s node", np->name);
if (!request_mem_region(res.start,
resource_size(&res),
res.name))
panic("Failed to request resources for %s node", np->name);
of_node_put(np);
return ioremap(res.start, resource_size(&res));
}
void __init ralink_of_remap(void)
{
rt_sysc_membase = mtmips_of_remap_node(mtmips_sysc_match, "system");
rt_memc_membase = mtmips_of_remap_node(mtmips_memc_match, "memory");
if (!rt_sysc_membase || !rt_memc_membase)
panic("Failed to remap core resources");
}
void __init plat_mem_setup(void)
{
void *dtb;
set_io_port_base(KSEG1);
/*
* Load the builtin devicetree. This causes the chosen node to be
* parsed resulting in our memory appearing.
*/
dtb = get_fdt();
__dt_setup_arch(dtb);
if (early_init_dt_scan_memory())
return;
if (soc_info.mem_detect)
soc_info.mem_detect();
else if (soc_info.mem_size)
memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
else
detect_memory_region(soc_info.mem_base,
soc_info.mem_size_min * SZ_1M,
soc_info.mem_size_max * SZ_1M);
}
static int __init plat_of_setup(void)
{
__dt_register_buses(soc_info.compatible, "palmbus");
return 0;
}
arch_initcall(plat_of_setup);
|
