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;
30 EXPORT_SYMBOL_GPL(rt_sysc_membase);
31
plat_of_remap_node(const char * node)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
plat_mem_setup(void)54 void __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
plat_of_setup(void)80 static 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
91 arch_initcall(plat_of_setup);
92