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