Merge branch 'tda998x-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-cubox into...
[cascardo/linux.git] / arch / mips / lantiq / prom.c
1 /*
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) 2010 John Crispin <blogic@openwrt.org>
7  */
8
9 #include <linux/export.h>
10 #include <linux/clk.h>
11 #include <linux/bootmem.h>
12 #include <linux/of_platform.h>
13 #include <linux/of_fdt.h>
14
15 #include <asm/bootinfo.h>
16 #include <asm/time.h>
17 #include <asm/prom.h>
18
19 #include <lantiq.h>
20
21 #include "prom.h"
22 #include "clk.h"
23
24 /* access to the ebu needs to be locked between different drivers */
25 DEFINE_SPINLOCK(ebu_lock);
26 EXPORT_SYMBOL_GPL(ebu_lock);
27
28 /*
29  * this struct is filled by the soc specific detection code and holds
30  * information about the specific soc type, revision and name
31  */
32 static struct ltq_soc_info soc_info;
33
34 const char *get_system_type(void)
35 {
36         return soc_info.sys_type;
37 }
38
39 void prom_free_prom_memory(void)
40 {
41 }
42
43 static void __init prom_init_cmdline(void)
44 {
45         int argc = fw_arg0;
46         char **argv = (char **) KSEG1ADDR(fw_arg1);
47         int i;
48
49         arcs_cmdline[0] = '\0';
50
51         for (i = 0; i < argc; i++) {
52                 char *p = (char *) KSEG1ADDR(argv[i]);
53
54                 if (CPHYSADDR(p) && *p) {
55                         strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
56                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
57                 }
58         }
59 }
60
61 void __init plat_mem_setup(void)
62 {
63         ioport_resource.start = IOPORT_RESOURCE_START;
64         ioport_resource.end = IOPORT_RESOURCE_END;
65         iomem_resource.start = IOMEM_RESOURCE_START;
66         iomem_resource.end = IOMEM_RESOURCE_END;
67
68         set_io_port_base((unsigned long) KSEG1);
69
70         /*
71          * Load the builtin devicetree. This causes the chosen node to be
72          * parsed resulting in our memory appearing
73          */
74         __dt_setup_arch(__dtb_start);
75 }
76
77 void __init device_tree_init(void)
78 {
79         unflatten_and_copy_device_tree();
80 }
81
82 void __init prom_init(void)
83 {
84         /* call the soc specific detetcion code and get it to fill soc_info */
85         ltq_soc_detect(&soc_info);
86         snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
87                 soc_info.name, soc_info.rev_type);
88         soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
89         pr_info("SoC: %s\n", soc_info.sys_type);
90         prom_init_cmdline();
91
92 #if defined(CONFIG_MIPS_MT_SMP)
93         if (register_vsmp_smp_ops())
94                 panic("failed to register_vsmp_smp_ops()");
95 #endif
96 }
97
98 int __init plat_of_setup(void)
99 {
100         static struct of_device_id of_ids[3];
101
102         if (!of_have_populated_dt())
103                 panic("device tree not present");
104
105         strlcpy(of_ids[0].compatible, soc_info.compatible,
106                 sizeof(of_ids[0].compatible));
107         strncpy(of_ids[1].compatible, "simple-bus",
108                 sizeof(of_ids[1].compatible));
109         return of_platform_populate(NULL, of_ids, NULL, NULL);
110 }
111
112 arch_initcall(plat_of_setup);