1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
5*4882a593Smuzhiyun * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
6*4882a593Smuzhiyun * Copyright (C) 2013 John Crispin <john@phrozen.org>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/io.h>
10*4882a593Smuzhiyun #include <linux/clk.h>
11*4882a593Smuzhiyun #include <linux/export.h>
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/sizes.h>
14*4882a593Smuzhiyun #include <linux/of_fdt.h>
15*4882a593Smuzhiyun #include <linux/kernel.h>
16*4882a593Smuzhiyun #include <linux/memblock.h>
17*4882a593Smuzhiyun #include <linux/of_platform.h>
18*4882a593Smuzhiyun #include <linux/of_address.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include <asm/reboot.h>
21*4882a593Smuzhiyun #include <asm/bootinfo.h>
22*4882a593Smuzhiyun #include <asm/addrspace.h>
23*4882a593Smuzhiyun #include <asm/prom.h>
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun #include "common.h"
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun __iomem void *rt_sysc_membase;
28*4882a593Smuzhiyun __iomem void *rt_memc_membase;
29*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(rt_sysc_membase);
30*4882a593Smuzhiyun
plat_of_remap_node(const char * node)31*4882a593Smuzhiyun __iomem void *plat_of_remap_node(const char *node)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun struct resource res;
34*4882a593Smuzhiyun struct device_node *np;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun np = of_find_compatible_node(NULL, NULL, node);
37*4882a593Smuzhiyun if (!np)
38*4882a593Smuzhiyun panic("Failed to find %s node", node);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (of_address_to_resource(np, 0, &res))
41*4882a593Smuzhiyun panic("Failed to get resource for %s", node);
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun if (!request_mem_region(res.start,
44*4882a593Smuzhiyun resource_size(&res),
45*4882a593Smuzhiyun res.name))
46*4882a593Smuzhiyun panic("Failed to request resources for %s", node);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun return ioremap(res.start, resource_size(&res));
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
device_tree_init(void)51*4882a593Smuzhiyun void __init device_tree_init(void)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun unflatten_and_copy_device_tree();
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun static int memory_dtb;
57*4882a593Smuzhiyun
early_init_dt_find_memory(unsigned long node,const char * uname,int depth,void * data)58*4882a593Smuzhiyun static int __init early_init_dt_find_memory(unsigned long node,
59*4882a593Smuzhiyun const char *uname, int depth, void *data)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun if (depth == 1 && !strcmp(uname, "memory@0"))
62*4882a593Smuzhiyun memory_dtb = 1;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun return 0;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
plat_mem_setup(void)67*4882a593Smuzhiyun void __init plat_mem_setup(void)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun void *dtb = NULL;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun set_io_port_base(KSEG1);
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun /*
74*4882a593Smuzhiyun * Load the builtin devicetree. This causes the chosen node to be
75*4882a593Smuzhiyun * parsed resulting in our memory appearing. fw_passed_dtb is used
76*4882a593Smuzhiyun * by CONFIG_MIPS_APPENDED_RAW_DTB as well.
77*4882a593Smuzhiyun */
78*4882a593Smuzhiyun if (fw_passed_dtb)
79*4882a593Smuzhiyun dtb = (void *)fw_passed_dtb;
80*4882a593Smuzhiyun else if (&__dtb_start != &__dtb_end)
81*4882a593Smuzhiyun dtb = (void *)__dtb_start;
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun __dt_setup_arch(dtb);
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun of_scan_flat_dt(early_init_dt_find_memory, NULL);
86*4882a593Smuzhiyun if (memory_dtb)
87*4882a593Smuzhiyun of_scan_flat_dt(early_init_dt_scan_memory, NULL);
88*4882a593Smuzhiyun else if (soc_info.mem_size)
89*4882a593Smuzhiyun memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
90*4882a593Smuzhiyun else
91*4882a593Smuzhiyun detect_memory_region(soc_info.mem_base,
92*4882a593Smuzhiyun soc_info.mem_size_min * SZ_1M,
93*4882a593Smuzhiyun soc_info.mem_size_max * SZ_1M);
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
plat_of_setup(void)96*4882a593Smuzhiyun static int __init plat_of_setup(void)
97*4882a593Smuzhiyun {
98*4882a593Smuzhiyun __dt_register_buses(soc_info.compatible, "palmbus");
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun /* make sure that the reset controller is setup early */
101*4882a593Smuzhiyun ralink_rst_init();
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun return 0;
104*4882a593Smuzhiyun }
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun arch_initcall(plat_of_setup);
107