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);