spl_spi.c
4.23 KB
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2011 OMICRON electronics GmbH
*
* based on drivers/mtd/nand/raw/nand_spl_load.c
*
* Copyright (C) 2011
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*/
#include <common.h>
#include <spi.h>
#include <spi_flash.h>
#include <errno.h>
#include <spl.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_SPL_OS_BOOT
/*
* Load the kernel, check for a valid header we can parse, and if found load
* the kernel and then device tree.
*/
static int spi_load_image_os(struct spl_image_info *spl_image,
struct spi_flash *flash,
struct image_header *header)
{
int err;
/* Read for a header, parse or error out. */
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, sizeof(*header),
(void *)header);
if (image_get_magic(header) != IH_MAGIC)
return -1;
err = spl_parse_image_header(spl_image, header);
if (err)
return err;
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
spl_image->size, (void *)spl_image->load_addr);
/* Read device tree. */
spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
CONFIG_SYS_SPI_ARGS_SIZE,
(void *)CONFIG_SYS_SPL_ARGS_ADDR);
return 0;
}
#endif
#ifdef CONFIG_SYS_SPI_U_BOOT_OFFS
unsigned long __weak spl_spi_get_uboot_raw_sector(struct spi_flash *flash)
{
return CONFIG_SYS_SPI_U_BOOT_OFFS;
}
#endif
#ifdef CONFIG_PARSE_CONTAINER
int __weak spi_load_image_parse_container(struct spl_image_info *spl_image,
struct spi_flash *flash,
unsigned long offset)
{
return -EINVAL;
}
#endif
static ulong spl_spi_fit_read(struct spl_load_info *load, ulong sector,
ulong count, void *buf)
{
struct spi_flash *flash = load->dev;
ulong ret;
ret = spi_flash_read(flash, sector, count, buf);
if (!ret)
return count;
else
return 0;
}
/*
* The main entry for SPI booting. It's necessary that SDRAM is already
* configured and available since this code loads the main U-Boot image
* from SPI into SDRAM and starts it from there.
*/
static int spl_spi_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
int err = 0;
unsigned payload_offs = 0;
struct spi_flash *flash;
struct image_header *header;
/*
* Load U-Boot image from SPI flash into RAM
*/
flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
CONFIG_SF_DEFAULT_CS,
CONFIG_SF_DEFAULT_SPEED,
CONFIG_SF_DEFAULT_MODE);
if (!flash) {
puts("SPI probe failed.\n");
return -ENODEV;
}
payload_offs = spl_spi_get_uboot_raw_sector(flash);
header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
payload_offs = fdtdec_get_config_int(gd->fdt_blob,
"u-boot,spl-payload-offset",
payload_offs);
#endif
#ifdef CONFIG_SPL_OS_BOOT
if (spl_start_uboot() || spi_load_image_os(spl_image, flash, header))
#endif
{
/* Load u-boot, mkimage header is 64 bytes. */
err = spi_flash_read(flash, payload_offs, sizeof(*header),
(void *)header);
if (err) {
debug("%s: Failed to read from SPI flash (err=%d)\n",
__func__, err);
return err;
}
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
image_get_magic(header) == FDT_MAGIC) {
err = spi_flash_read(flash, payload_offs,
roundup(fdt_totalsize(header), 4),
(void *)CONFIG_SYS_LOAD_ADDR);
if (err)
return err;
err = spl_parse_image_header(spl_image,
(struct image_header *)CONFIG_SYS_LOAD_ADDR);
} else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
image_get_magic(header) == FDT_MAGIC) {
struct spl_load_info load;
debug("Found FIT\n");
load.dev = flash;
load.priv = NULL;
load.filename = NULL;
load.bl_len = 1;
load.read = spl_spi_fit_read;
err = spl_load_simple_fit(spl_image, &load,
payload_offs,
header);
} else {
#ifdef CONFIG_PARSE_CONTAINER
err = spi_load_image_parse_container(spl_image,
flash,
payload_offs);
#else
err = spl_parse_image_header(spl_image, header);
if (err)
return err;
err = spi_flash_read(flash, payload_offs,
spl_image->size,
(void *)spl_image->load_addr);
#endif
}
}
return err;
}
/* Use priorty 1 so that boards can override this */
SPL_LOAD_IMAGE_METHOD("SPI", 1, BOOT_DEVICE_SPI, spl_spi_load_image);