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authorSimon Glass <sjg@chromium.org>2016-09-24 18:20:08 -0600
committerTom Rini <trini@konsulko.com>2016-10-06 15:07:33 -0400
commit0a9b73a13e3440994d4b245ffdc86c51361a296d (patch)
treea09c2e012eaba694a0be9e864106ea38041b207b /common
parent7557147927fcc4099d62f564f42babc2370834f3 (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')
-rw-r--r--common/spl/Makefile1
-rw-r--r--common/spl/spl_spi.c123
2 files changed, 124 insertions, 0 deletions
diff --git a/common/spl/Makefile b/common/spl/Makefile
index 5bd0b1841ee..ed02635e720 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -25,4 +25,5 @@ obj-$(CONFIG_SPL_FAT_SUPPORT) += spl_fat.o
obj-$(CONFIG_SPL_EXT_SUPPORT) += spl_ext.o
obj-$(CONFIG_SPL_SATA_SUPPORT) += spl_sata.o
obj-$(CONFIG_SPL_DFU_SUPPORT) += spl_dfu.o
+obj-$(CONFIG_SPL_SPI_LOAD) += spl_spi.o
endif
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;
+}