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_platform.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
32__iomem void *plat_of_remap_node(const char *node)
33{
34	struct resource res;
35	struct device_node *np;
36
37	np = of_find_compatible_node(NULL, NULL, node);
38	if (!np)
39		panic("Failed to find %s node", node);
40
41	if (of_address_to_resource(np, 0, &res))
42		panic("Failed to get resource for %s", node);
43
44	of_node_put(np);
45
46	if (!request_mem_region(res.start,
47				resource_size(&res),
48				res.name))
49		panic("Failed to request resources for %s", node);
50
51	return ioremap(res.start, resource_size(&res));
52}
53
54void __init plat_mem_setup(void)
55{
56	void *dtb;
57
58	set_io_port_base(KSEG1);
59
60	/*
61	 * Load the builtin devicetree. This causes the chosen node to be
62	 * parsed resulting in our memory appearing.
63	 */
64	dtb = get_fdt();
65	__dt_setup_arch(dtb);
66
67	if (early_init_dt_scan_memory())
68		return;
69
70	if (soc_info.mem_detect)
71		soc_info.mem_detect();
72	else if (soc_info.mem_size)
73		memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
74	else
75		detect_memory_region(soc_info.mem_base,
76				     soc_info.mem_size_min * SZ_1M,
77				     soc_info.mem_size_max * SZ_1M);
78}
79
80static int __init plat_of_setup(void)
81{
82	__dt_register_buses(soc_info.compatible, "palmbus");
83
84	/* make sure that the reset controller is setup early */
85	if (ralink_soc != MT762X_SOC_MT7621AT)
86		ralink_rst_init();
87
88	return 0;
89}
90
91arch_initcall(plat_of_setup);