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, matches: match); |
62 | if (!np) |
63 | panic(fmt: "Failed to find %s controller node" , type); |
64 | |
65 | if (of_address_to_resource(dev: np, index: 0, r: &res)) |
66 | panic(fmt: "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(fmt: "Failed to request resources for %s node" , np->name); |
72 | |
73 | of_node_put(node: np); |
74 | |
75 | return ioremap(offset: res.start, size: resource_size(res: &res)); |
76 | } |
77 | |
78 | void __init ralink_of_remap(void) |
79 | { |
80 | rt_sysc_membase = mtmips_of_remap_node(match: mtmips_sysc_match, type: "system" ); |
81 | rt_memc_membase = mtmips_of_remap_node(match: mtmips_memc_match, type: "memory" ); |
82 | |
83 | if (!rt_sysc_membase || !rt_memc_membase) |
84 | panic(fmt: "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(base: soc_info.mem_base, size: 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 | |