1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Copyright (C) 2010 John Crispin <john@phrozen.org>
5 */
6
7 #include <linux/export.h>
8 #include <linux/clk.h>
9 #include <linux/memblock.h>
10 #include <linux/of_fdt.h>
11
12 #include <asm/bootinfo.h>
13 #include <asm/time.h>
14 #include <asm/prom.h>
15
16 #include <lantiq.h>
17
18 #include "prom.h"
19 #include "clk.h"
20
21 /* access to the ebu needs to be locked between different drivers */
22 DEFINE_SPINLOCK(ebu_lock);
23 EXPORT_SYMBOL_GPL(ebu_lock);
24
25 /*
26 * this struct is filled by the soc specific detection code and holds
27 * information about the specific soc type, revision and name
28 */
29 static struct ltq_soc_info soc_info;
30
get_system_type(void)31 const char *get_system_type(void)
32 {
33 return soc_info.sys_type;
34 }
35
ltq_soc_type(void)36 int ltq_soc_type(void)
37 {
38 return soc_info.type;
39 }
40
prom_free_prom_memory(void)41 void __init prom_free_prom_memory(void)
42 {
43 }
44
prom_init_cmdline(void)45 static void __init prom_init_cmdline(void)
46 {
47 int argc = fw_arg0;
48 char **argv = (char **) KSEG1ADDR(fw_arg1);
49 int i;
50
51 arcs_cmdline[0] = '\0';
52
53 for (i = 0; i < argc; i++) {
54 char *p = (char *) KSEG1ADDR(argv[i]);
55
56 if (CPHYSADDR(p) && *p) {
57 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
58 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
59 }
60 }
61 }
62
plat_mem_setup(void)63 void __init plat_mem_setup(void)
64 {
65 void *dtb;
66
67 ioport_resource.start = IOPORT_RESOURCE_START;
68 ioport_resource.end = IOPORT_RESOURCE_END;
69 iomem_resource.start = IOMEM_RESOURCE_START;
70 iomem_resource.end = IOMEM_RESOURCE_END;
71
72 set_io_port_base((unsigned long) KSEG1);
73
74 if (fw_passed_dtb) /* UHI interface */
75 dtb = (void *)fw_passed_dtb;
76 else if (&__dtb_start != &__dtb_end)
77 dtb = (void *)__dtb_start;
78 else
79 panic("no dtb found");
80
81 /*
82 * Load the devicetree. This causes the chosen node to be
83 * parsed resulting in our memory appearing
84 */
85 __dt_setup_arch(dtb);
86 }
87
device_tree_init(void)88 void __init device_tree_init(void)
89 {
90 unflatten_and_copy_device_tree();
91 }
92
prom_init(void)93 void __init prom_init(void)
94 {
95 /* call the soc specific detetcion code and get it to fill soc_info */
96 ltq_soc_detect(&soc_info);
97 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
98 soc_info.name, soc_info.rev_type);
99 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
100 pr_info("SoC: %s\n", soc_info.sys_type);
101 prom_init_cmdline();
102
103 #if defined(CONFIG_MIPS_MT_SMP)
104 if (register_vsmp_smp_ops())
105 panic("failed to register_vsmp_smp_ops()");
106 #endif
107 }
108