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1/*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
5 *
6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
8 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
9 */
10
11#include <linux/io.h>
12#include <linux/clk.h>
13#include <linux/init.h>
14#include <linux/sizes.h>
15#include <linux/of_fdt.h>
16#include <linux/kernel.h>
17#include <linux/bootmem.h>
18#include <linux/of_platform.h>
19#include <linux/of_address.h>
20
21#include <asm/reboot.h>
22#include <asm/bootinfo.h>
23#include <asm/addrspace.h>
24#include <asm/prom.h>
25
26#include "common.h"
27
28__iomem void *rt_sysc_membase;
29__iomem void *rt_memc_membase;
30
31extern struct boot_param_header __dtb_start;
32
33__iomem void *plat_of_remap_node(const char *node)
34{
35 struct resource res;
36 struct device_node *np;
37
38 np = of_find_compatible_node(NULL, NULL, node);
39 if (!np)
40 panic("Failed to find %s node", node);
41
42 if (of_address_to_resource(np, 0, &res))
43 panic("Failed to get resource for %s", node);
44
45 if ((request_mem_region(res.start,
46 resource_size(&res),
47 res.name) < 0))
48 panic("Failed to request resources for %s", node);
49
50 return ioremap_nocache(res.start, resource_size(&res));
51}
52
53void __init device_tree_init(void)
54{
55 unsigned long base, size;
56 void *fdt_copy;
57
58 if (!initial_boot_params)
59 return;
60
61 base = virt_to_phys((void *)initial_boot_params);
62 size = be32_to_cpu(initial_boot_params->totalsize);
63
64 /* Before we do anything, lets reserve the dt blob */
65 reserve_bootmem(base, size, BOOTMEM_DEFAULT);
66
67 /* The strings in the flattened tree are referenced directly by the
68 * device tree, so copy the flattened device tree from init memory
69 * to regular memory.
70 */
71 fdt_copy = alloc_bootmem(size);
72 memcpy(fdt_copy, initial_boot_params, size);
73 initial_boot_params = fdt_copy;
74
75 unflatten_device_tree();
76
77 /* free the space reserved for the dt blob */
78 free_bootmem(base, size);
79}
80
81void __init plat_mem_setup(void)
82{
83 set_io_port_base(KSEG1);
84
85 /*
86 * Load the builtin devicetree. This causes the chosen node to be
87 * parsed resulting in our memory appearing
88 */
89 __dt_setup_arch(&__dtb_start);
90
91 if (soc_info.mem_size)
92 add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
93 BOOT_MEM_RAM);
94 else
95 detect_memory_region(soc_info.mem_base,
96 soc_info.mem_size_min * SZ_1M,
97 soc_info.mem_size_max * SZ_1M);
98}
99
100static int __init plat_of_setup(void)
101{
102 static struct of_device_id of_ids[3];
103 int len = sizeof(of_ids[0].compatible);
104
105 if (!of_have_populated_dt())
106 panic("device tree not present");
107
108 strlcpy(of_ids[0].compatible, soc_info.compatible, len);
109 strncpy(of_ids[1].compatible, "palmbus", len);
110
111 if (of_platform_populate(NULL, of_ids, NULL, NULL))
112 panic("failed to populate DT");
113
114 /* make sure ithat the reset controller is setup early */
115 ralink_rst_init();
116
117 return 0;
118}
119
120arch_initcall(plat_of_setup);
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);