blob: f9eda5d8f82cd54681efbdf65c4f55123a3dfeed [file] [log] [blame]
John Crispin3a5bfe72013-01-20 22:02:01 +01001/*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
5 *
6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
8 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
9 */
10
11#include <linux/io.h>
12#include <linux/clk.h>
13#include <linux/init.h>
John Crispindd63b002013-04-13 15:15:51 +020014#include <linux/sizes.h>
John Crispin3a5bfe72013-01-20 22:02:01 +010015#include <linux/of_fdt.h>
16#include <linux/kernel.h>
17#include <linux/bootmem.h>
18#include <linux/of_platform.h>
19#include <linux/of_address.h>
20
21#include <asm/reboot.h>
22#include <asm/bootinfo.h>
23#include <asm/addrspace.h>
Rob Herring089a49b2013-09-07 14:58:54 -050024#include <asm/prom.h>
John Crispin3a5bfe72013-01-20 22:02:01 +010025
26#include "common.h"
27
28__iomem void *rt_sysc_membase;
29__iomem void *rt_memc_membase;
30
John Crispin3a5bfe72013-01-20 22:02:01 +010031__iomem void *plat_of_remap_node(const char *node)
32{
33 struct resource res;
34 struct device_node *np;
35
36 np = of_find_compatible_node(NULL, NULL, node);
37 if (!np)
38 panic("Failed to find %s node", node);
39
40 if (of_address_to_resource(np, 0, &res))
41 panic("Failed to get resource for %s", node);
42
43 if ((request_mem_region(res.start,
44 resource_size(&res),
45 res.name) < 0))
46 panic("Failed to request resources for %s", node);
47
48 return ioremap_nocache(res.start, resource_size(&res));
49}
50
51void __init device_tree_init(void)
52{
Rob Herringafb46f72014-04-02 19:07:24 -050053 unflatten_and_copy_device_tree();
John Crispin3a5bfe72013-01-20 22:02:01 +010054}
55
John Crispin15d11122014-10-08 22:40:02 +020056static int memory_dtb;
57
58static int __init early_init_dt_find_memory(unsigned long node,
59 const char *uname, int depth, void *data)
60{
61 if (depth == 1 && !strcmp(uname, "memory@0"))
62 memory_dtb = 1;
63
64 return 0;
65}
66
John Crispin3a5bfe72013-01-20 22:02:01 +010067void __init plat_mem_setup(void)
68{
69 set_io_port_base(KSEG1);
70
71 /*
72 * Load the builtin devicetree. This causes the chosen node to be
73 * parsed resulting in our memory appearing
74 */
Rob Herring0cdde832014-03-31 15:13:07 -050075 __dt_setup_arch(__dtb_start);
John Crispindd63b002013-04-13 15:15:51 +020076
John Crispin15d11122014-10-08 22:40:02 +020077 of_scan_flat_dt(early_init_dt_find_memory, NULL);
78 if (memory_dtb)
79 of_scan_flat_dt(early_init_dt_scan_memory, NULL);
80 else if (soc_info.mem_size)
John Crispincdfce532013-06-06 12:55:53 +000081 add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
John Crispindd63b002013-04-13 15:15:51 +020082 BOOT_MEM_RAM);
83 else
84 detect_memory_region(soc_info.mem_base,
85 soc_info.mem_size_min * SZ_1M,
86 soc_info.mem_size_max * SZ_1M);
John Crispin3a5bfe72013-01-20 22:02:01 +010087}
88
89static int __init plat_of_setup(void)
90{
Kevin Cernekee84988c02014-10-20 21:28:02 -070091 __dt_register_buses(soc_info.compatible, "palmbus");
John Crispin3a5bfe72013-01-20 22:02:01 +010092
Kevin Cernekee84988c02014-10-20 21:28:02 -070093 /* make sure that the reset controller is setup early */
John Crispin2a153f12013-09-04 00:16:59 +020094 ralink_rst_init();
95
John Crispin3a5bfe72013-01-20 22:02:01 +010096 return 0;
97}
98
99arch_initcall(plat_of_setup);