1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Joshua Henderson, joshua.henderson@microchip.com
* Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/of_address.h>
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <linux/platform_data/sdhci-pic32.h>
#include <asm/fw/fw.h>
#include <asm/mips-boards/generic.h>
#include <asm/prom.h>
#include "pic32mzda.h"
const char *get_system_type(void)
{
return "PIC32MZDA";
}
static ulong get_fdtaddr(void)
{
ulong ftaddr = 0;
if (fw_passed_dtb && !fw_arg2 && !fw_arg3)
return (ulong)fw_passed_dtb;
if (&__dtb_start < &__dtb_end)
ftaddr = (ulong)__dtb_start;
return ftaddr;
}
void __init plat_mem_setup(void)
{
void *dtb;
dtb = (void *)get_fdtaddr();
if (!dtb) {
pr_err("pic32: no DTB found.\n");
return;
}
/*
* Load the builtin device tree. This causes the chosen node to be
* parsed resulting in our memory appearing.
*/
__dt_setup_arch(dtb);
pr_info("Found following command lines\n");
pr_info(" boot_command_line: %s\n", boot_command_line);
pr_info(" arcs_cmdline : %s\n", arcs_cmdline);
#ifdef CONFIG_CMDLINE_BOOL
pr_info(" builtin_cmdline : %s\n", CONFIG_CMDLINE);
#endif
if (dtb != __dtb_start)
strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
#ifdef CONFIG_EARLY_PRINTK
fw_init_early_console();
#endif
pic32_config_init();
}
static __init void pic32_init_cmdline(int argc, char *argv[])
{
unsigned int count = COMMAND_LINE_SIZE - 1;
int i;
char *dst = &(arcs_cmdline[0]);
char *src;
for (i = 1; i < argc && count; ++i) {
src = argv[i];
while (*src && count) {
*dst++ = *src++;
--count;
}
*dst++ = ' ';
}
if (i > 1)
--dst;
*dst = 0;
}
void __init prom_init(void)
{
pic32_init_cmdline((int)fw_arg0, (char **)fw_arg1);
}
void __init prom_free_prom_memory(void)
{
}
void __init device_tree_init(void)
{
if (!initial_boot_params)
return;
unflatten_and_copy_device_tree();
}
static struct pic32_sdhci_platform_data sdhci_data = {
.setup_dma = pic32_set_sdhci_adma_fifo_threshold,
};
static struct of_dev_auxdata pic32_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("microchip,pic32mzda-sdhci", 0, "sdhci", &sdhci_data),
{ /* sentinel */}
};
static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup)
{
struct device_node *root, *np;
struct resource res;
root = of_find_node_by_path("/");
for (; lookup->compatible; lookup++) {
np = of_find_compatible_node(NULL, NULL, lookup->compatible);
if (np) {
lookup->name = (char *)np->name;
if (lookup->phys_addr)
continue;
if (!of_address_to_resource(np, 0, &res))
lookup->phys_addr = res.start;
}
}
return 0;
}
static int __init plat_of_setup(void)
{
if (!of_have_populated_dt())
panic("Device tree not present");
pic32_of_prepare_platform_data(pic32_auxdata_lookup);
if (of_platform_default_populate(NULL, pic32_auxdata_lookup, NULL))
panic("Failed to populate DT");
return 0;
}
arch_initcall(plat_of_setup);
|
