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
spl_spi_get_uboot_offs(struct spi_flash * flash)66 unsigned int __weak spl_spi_get_uboot_offs(struct spi_flash *flash)
67 {
68 return CONFIG_SYS_SPI_U_BOOT_OFFS;
69 }
70
71 /*
72 * The main entry for SPI booting. It's necessary that SDRAM is already
73 * configured and available since this code loads the main U-Boot image
74 * from SPI into SDRAM and starts it from there.
75 */
spl_spi_load_image(struct spl_image_info * spl_image,struct spl_boot_device * bootdev)76 static int spl_spi_load_image(struct spl_image_info *spl_image,
77 struct spl_boot_device *bootdev)
78 {
79 int err = 0;
80 unsigned int payload_offs;
81 struct spi_flash *flash;
82 struct image_header *header;
83
84 /*
85 * Load U-Boot image from SPI flash into RAM
86 * In DM mode: defaults speed and mode will be
87 * taken from DT when available
88 */
89
90 flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
91 CONFIG_SF_DEFAULT_CS,
92 CONFIG_SF_DEFAULT_SPEED,
93 CONFIG_SF_DEFAULT_MODE);
94 if (!flash) {
95 puts("SPI probe failed.\n");
96 return -ENODEV;
97 }
98
99 payload_offs = spl_spi_get_uboot_offs(flash);
100
101 header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
102
103 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
104 payload_offs = fdtdec_get_config_int(gd->fdt_blob,
105 "u-boot,spl-payload-offset",
106 payload_offs);
107 #endif
108
109 #ifdef CONFIG_SPL_OS_BOOT
110 if (spl_start_uboot() || spi_load_image_os(spl_image, flash, header))
111 #endif
112 {
113 /* Load u-boot, mkimage header is 64 bytes. */
114 err = spi_flash_read(flash, payload_offs, sizeof(*header),
115 (void *)header);
116 if (err) {
117 debug("%s: Failed to read from SPI flash (err=%d)\n",
118 __func__, err);
119 return err;
120 }
121
122 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
123 image_get_magic(header) == FDT_MAGIC) {
124 err = spi_flash_read(flash, payload_offs,
125 roundup(fdt_totalsize(header), 4),
126 (void *)CONFIG_SYS_LOAD_ADDR);
127 if (err)
128 return err;
129 err = spl_parse_image_header(spl_image,
130 (struct image_header *)CONFIG_SYS_LOAD_ADDR);
131 } else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
132 image_get_magic(header) == FDT_MAGIC) {
133 struct spl_load_info load;
134
135 debug("Found FIT\n");
136 load.dev = flash;
137 load.priv = NULL;
138 load.filename = NULL;
139 load.bl_len = 1;
140 load.read = spl_spi_fit_read;
141 err = spl_load_simple_fit(spl_image, &load,
142 payload_offs,
143 header);
144 } else if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER)) {
145 struct spl_load_info load;
146
147 load.dev = flash;
148 load.priv = NULL;
149 load.filename = NULL;
150 load.bl_len = 1;
151 load.read = spl_spi_fit_read;
152
153 err = spl_load_imx_container(spl_image, &load,
154 payload_offs);
155 } else {
156 err = spl_parse_image_header(spl_image, header);
157 if (err)
158 return err;
159 err = spi_flash_read(flash, payload_offs,
160 spl_image->size,
161 (void *)spl_image->load_addr);
162 }
163 }
164
165 return err;
166 }
167 /* Use priorty 1 so that boards can override this */
168 SPL_LOAD_IMAGE_METHOD("SPI", 1, BOOT_DEVICE_SPI, spl_spi_load_image);
169