1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2011 OMICRON electronics GmbH
4 *
5 * based on drivers/mtd/nand/raw/nand_spl_load.c
6 *
7 * Copyright (C) 2011
8 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
9 */
10
11 #include <common.h>
12 #include <spi.h>
13 #include <spi_flash.h>
14 #include <errno.h>
15 #include <spl.h>
16
17 DECLARE_GLOBAL_DATA_PTR;
18
19 #ifdef CONFIG_SPL_OS_BOOT
20 /*
21 * Load the kernel, check for a valid header we can parse, and if found load
22 * the kernel and then device tree.
23 */
spi_load_image_os(struct spl_image_info * spl_image,struct spi_flash * flash,struct image_header * header)24 static int spi_load_image_os(struct spl_image_info *spl_image,
25 struct spi_flash *flash,
26 struct image_header *header)
27 {
28 int err;
29
30 /* Read for a header, parse or error out. */
31 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, sizeof(*header),
32 (void *)header);
33
34 if (image_get_magic(header) != IH_MAGIC)
35 return -1;
36
37 err = spl_parse_image_header(spl_image, header);
38 if (err)
39 return err;
40
41 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
42 spl_image->size, (void *)spl_image->load_addr);
43
44 /* Read device tree. */
45 spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
46 CONFIG_SYS_SPI_ARGS_SIZE,
47 (void *)CONFIG_SYS_SPL_ARGS_ADDR);
48
49 return 0;
50 }
51 #endif
52
spl_spi_fit_read(struct spl_load_info * load,ulong sector,ulong count,void * buf)53 static ulong spl_spi_fit_read(struct spl_load_info *load, ulong sector,
54 ulong count, void *buf)
55 {
56 struct spi_flash *flash = load->dev;
57 ulong ret;
58
59 ret = spi_flash_read(flash, sector, count, buf);
60 if (!ret)
61 return count;
62 else
63 return 0;
64 }
65 /*
66 * The main entry for SPI booting. It's necessary that SDRAM is already
67 * configured and available since this code loads the main U-Boot image
68 * from SPI into SDRAM and starts it from there.
69 */
spl_spi_load_image(struct spl_image_info * spl_image,struct spl_boot_device * bootdev)70 static int spl_spi_load_image(struct spl_image_info *spl_image,
71 struct spl_boot_device *bootdev)
72 {
73 int err = 0;
74 unsigned payload_offs = CONFIG_SYS_SPI_U_BOOT_OFFS;
75 struct spi_flash *flash;
76 struct image_header *header;
77
78 /*
79 * Load U-Boot image from SPI flash into RAM
80 */
81
82 flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
83 CONFIG_SF_DEFAULT_CS,
84 CONFIG_SF_DEFAULT_SPEED,
85 CONFIG_SF_DEFAULT_MODE);
86 if (!flash) {
87 puts("SPI probe failed.\n");
88 return -ENODEV;
89 }
90
91 header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
92
93 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
94 payload_offs = fdtdec_get_config_int(gd->fdt_blob,
95 "u-boot,spl-payload-offset",
96 payload_offs);
97 #endif
98
99 #ifdef CONFIG_SPL_OS_BOOT
100 if (spl_start_uboot() || spi_load_image_os(spl_image, flash, header))
101 #endif
102 {
103 /* Load u-boot, mkimage header is 64 bytes. */
104 err = spi_flash_read(flash, payload_offs, sizeof(*header),
105 (void *)header);
106 if (err) {
107 debug("%s: Failed to read from SPI flash (err=%d)\n",
108 __func__, err);
109 return err;
110 }
111
112 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
113 image_get_magic(header) == FDT_MAGIC) {
114 err = spi_flash_read(flash, payload_offs,
115 roundup(fdt_totalsize(header), 4),
116 (void *)CONFIG_SYS_LOAD_ADDR);
117 if (err)
118 return err;
119 err = spl_parse_image_header(spl_image,
120 (struct image_header *)CONFIG_SYS_LOAD_ADDR);
121 } else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
122 image_get_magic(header) == FDT_MAGIC) {
123 struct spl_load_info load;
124
125 debug("Found FIT\n");
126 load.dev = flash;
127 load.priv = NULL;
128 load.filename = NULL;
129 load.bl_len = 1;
130 load.read = spl_spi_fit_read;
131 err = spl_load_simple_fit(spl_image, &load,
132 payload_offs,
133 header);
134 } else {
135 err = spl_parse_image_header(spl_image, header);
136 if (err)
137 return err;
138 err = spi_flash_read(flash, payload_offs,
139 spl_image->size,
140 (void *)spl_image->load_addr);
141 }
142 }
143
144 return err;
145 }
146 /* Use priorty 1 so that boards can override this */
147 SPL_LOAD_IMAGE_METHOD("SPI", 1, BOOT_DEVICE_SPI, spl_spi_load_image);
148