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;
30 EXPORT_SYMBOL_GPL(rt_sysc_membase);
31
32 static 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
41 static 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
55 static __iomem void *
56 mtmips_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
78 void __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
87 void __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
113 static int __init plat_of_setup(void)
114 {
115 __dt_register_buses(soc_info.compatible, "palmbus");
116
117 return 0;
118 }
119
120 arch_initcall(plat_of_setup);
121
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