diff options
author | Simon Glass <sjg@chromium.org> | 2016-09-24 18:20:08 -0600 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2016-10-06 15:07:33 -0400 |
commit | 0a9b73a13e3440994d4b245ffdc86c51361a296d (patch) | |
tree | a09c2e012eaba694a0be9e864106ea38041b207b /common/spl/spl_spi.c | |
parent | 7557147927fcc4099d62f564f42babc2370834f3 (diff) |
spl: spi: Move the generic SPI loader into common/spl
All the other SPL loaders are in this directory, so move the SPI one in
there too.
There are two board-specific SPI loaders (fsl and sunxi). These remain in
the drivers/mtd/spi directory, since they do not contain generic code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'common/spl/spl_spi.c')
-rw-r--r-- | common/spl/spl_spi.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/common/spl/spl_spi.c b/common/spl/spl_spi.c new file mode 100644 index 00000000000..e4cc0d08229 --- /dev/null +++ b/common/spl/spl_spi.c @@ -0,0 +1,123 @@ +/* + * Copyright (C) 2011 OMICRON electronics GmbH + * + * based on drivers/mtd/nand/nand_spl_load.c + * + * Copyright (C) 2011 + * Heiko Schocher, DENX Software Engineering, hs@denx.de. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <spi.h> +#include <spi_flash.h> +#include <errno.h> +#include <spl.h> + +#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 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, 0x40, + (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 + +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. + */ +int spl_spi_load_image(struct spl_boot_device *bootdev) +{ + int err = 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; + } + + /* use CONFIG_SYS_TEXT_BASE as temporary storage area */ + header = (struct image_header *)(CONFIG_SYS_TEXT_BASE); + +#ifdef CONFIG_SPL_OS_BOOT + if (spl_start_uboot() || spi_load_image_os(flash, header)) +#endif + { + /* Load u-boot, mkimage header is 64 bytes. */ + err = spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40, + (void *)header); + if (err) + return err; + + if (IS_ENABLED(CONFIG_SPL_LOAD_FIT)) { + 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(&load, + CONFIG_SYS_SPI_U_BOOT_OFFS, + header); + } else { + err = spl_parse_image_header(&spl_image, header); + if (err) + return err; + err = spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, + spl_image.size, + (void *)spl_image.load_addr); + } + } + + return err; +} |