1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *
4 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
5 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
6 * Copyright (C) 2013 John Crispin <john@phrozen.org>
7 */
8
9#include <linux/io.h>
10#include <linux/clk.h>
11#include <linux/export.h>
12#include <linux/init.h>
13#include <linux/sizes.h>
14#include <linux/of_fdt.h>
15#include <linux/kernel.h>
16#include <linux/memblock.h>
17#include <linux/of.h>
18#include <linux/of_address.h>
19
20#include <asm/reboot.h>
21#include <asm/bootinfo.h>
22#include <asm/addrspace.h>
23#include <asm/prom.h>
24#include <asm/mach-ralink/ralink_regs.h>
25
26#include "common.h"
27
28__iomem void *rt_sysc_membase;
29__iomem void *rt_memc_membase;
30EXPORT_SYMBOL_GPL(rt_sysc_membase);
31
32static const struct of_device_id mtmips_memc_match[] = {
33	{ .compatible = "mediatek,mt7621-memc" },
34	{ .compatible = "ralink,mt7620a-memc" },
35	{ .compatible = "ralink,rt2880-memc" },
36	{ .compatible = "ralink,rt3050-memc" },
37	{ .compatible = "ralink,rt3883-memc" },
38	{}
39};
40
41static const struct of_device_id mtmips_sysc_match[] = {
42	{ .compatible = "mediatek,mt7621-sysc" },
43	{ .compatible = "ralink,mt7620-sysc" },
44	{ .compatible = "ralink,mt7628-sysc" },
45	{ .compatible = "ralink,mt7688-sysc" },
46	{ .compatible = "ralink,rt2880-sysc" },
47	{ .compatible = "ralink,rt3050-sysc" },
48	{ .compatible = "ralink,rt3052-sysc" },
49	{ .compatible = "ralink,rt3352-sysc" },
50	{ .compatible = "ralink,rt3883-sysc" },
51	{ .compatible = "ralink,rt5350-sysc" },
52	{}
53};
54
55static __iomem void *
56mtmips_of_remap_node(const struct of_device_id *match, const char *type)
57{
58	struct resource res;
59	struct device_node *np;
60
61	np = of_find_matching_node(NULL, match);
62	if (!np)
63		panic("Failed to find %s controller node", type);
64
65	if (of_address_to_resource(np, 0, &res))
66		panic("Failed to get resource for %s node", np->name);
67
68	if (!request_mem_region(res.start,
69				resource_size(&res),
70				res.name))
71		panic("Failed to request resources for %s node", np->name);
72
73	of_node_put(np);
74
75	return ioremap(res.start, resource_size(&res));
76}
77
78void __init ralink_of_remap(void)
79{
80	rt_sysc_membase = mtmips_of_remap_node(mtmips_sysc_match, "system");
81	rt_memc_membase = mtmips_of_remap_node(mtmips_memc_match, "memory");
82
83	if (!rt_sysc_membase || !rt_memc_membase)
84		panic("Failed to remap core resources");
85}
86
87void __init plat_mem_setup(void)
88{
89	void *dtb;
90
91	set_io_port_base(KSEG1);
92
93	/*
94	 * Load the builtin devicetree. This causes the chosen node to be
95	 * parsed resulting in our memory appearing.
96	 */
97	dtb = get_fdt();
98	__dt_setup_arch(dtb);
99
100	if (early_init_dt_scan_memory())
101		return;
102
103	if (soc_info.mem_detect)
104		soc_info.mem_detect();
105	else if (soc_info.mem_size)
106		memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
107	else
108		detect_memory_region(soc_info.mem_base,
109				     soc_info.mem_size_min * SZ_1M,
110				     soc_info.mem_size_max * SZ_1M);
111}
112
113static int __init plat_of_setup(void)
114{
115	__dt_register_buses(soc_info.compatible, "palmbus");
116
117	return 0;
118}
119
120arch_initcall(plat_of_setup);
121