[U-Boot] [PATCH v5 2/2] splash: add support for loading splash from a FIT image
Tomas Melin
tomas.melin at vaisala.com
Fri Jan 13 12:20:14 CET 2017
Enable support for loading a splash image from within a FIT image.
The image is assumed to be generated with mkimage -E flag to hold
the data external to the FIT.
Signed-off-by: Tomas Melin <tomas.melin at vaisala.com>
---
Changes in v5:
- Change two debug() statements to use printf(), update printed error msg
Changes in v4:
- Added missing changelog
Changes in v3:
- Add documentation to README.splashprepare
- Change printf() to debug()
- Coding style fixes
Changes in v2:
- Add helper functions to image-fit.c for getting required FIT data fields
- Add comments
common/image-fit.c | 48 ++++++++++++++++++++++++++++++++
common/splash_source.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++-
doc/README.splashprepare | 15 ++++++----
include/image.h | 4 +++
include/splash.h | 5 ++--
5 files changed, 136 insertions(+), 8 deletions(-)
diff --git a/common/image-fit.c b/common/image-fit.c
index 77dc011..2bc536c 100644
--- a/common/image-fit.c
+++ b/common/image-fit.c
@@ -777,6 +777,54 @@ int fit_image_get_data(const void *fit, int noffset,
}
/**
+ * Get 'data-offset' property from a given image node.
+ *
+ * @fit: pointer to the FIT image header
+ * @noffset: component image node offset
+ * @data_offset: holds the data-offset property
+ *
+ * returns:
+ * 0, on success
+ * -ENOENT if the property could not be found
+ */
+int fit_image_get_data_offset(const void *fit, int noffset, int *data_offset)
+{
+ const fdt32_t *val;
+
+ val = fdt_getprop(fit, noffset, FIT_DATA_OFFSET_PROP, NULL);
+ if (!val)
+ return -ENOENT;
+
+ *data_offset = fdt32_to_cpu(*val);
+
+ return 0;
+}
+
+/**
+ * Get 'data-size' property from a given image node.
+ *
+ * @fit: pointer to the FIT image header
+ * @noffset: component image node offset
+ * @data_size: holds the data-size property
+ *
+ * returns:
+ * 0, on success
+ * -ENOENT if the property could not be found
+ */
+int fit_image_get_data_size(const void *fit, int noffset, int *data_size)
+{
+ const fdt32_t *val;
+
+ val = fdt_getprop(fit, noffset, FIT_DATA_SIZE_PROP, NULL);
+ if (!val)
+ return -ENOENT;
+
+ *data_size = fdt32_to_cpu(*val);
+
+ return 0;
+}
+
+/**
* fit_image_hash_get_algo - get hash algorithm name
* @fit: pointer to the FIT format image header
* @noffset: hash node offset
diff --git a/common/splash_source.c b/common/splash_source.c
index 5f6e961..4c64f10 100644
--- a/common/splash_source.c
+++ b/common/splash_source.c
@@ -10,6 +10,7 @@
#include <bmp_layout.h>
#include <errno.h>
#include <fs.h>
+#include <fdt_support.h>
#include <image.h>
#include <nand.h>
#include <sata.h>
@@ -296,6 +297,72 @@ static struct splash_location *select_splash_location(
return NULL;
}
+#ifdef CONFIG_FIT
+static int splash_load_fit(struct splash_location *location, u32 bmp_load_addr)
+{
+ int res;
+ int node_offset;
+ int splash_offset;
+ int splash_size;
+ struct image_header *img_header;
+ const u32 *fit_header;
+ u32 fit_size;
+ const size_t header_size = sizeof(struct image_header);
+
+ /* Read in image header */
+ res = splash_storage_read_raw(location, bmp_load_addr, header_size);
+ if (res < 0)
+ return res;
+
+ img_header = (struct image_header *)bmp_load_addr;
+ fit_size = fdt_totalsize(img_header);
+
+ /* Read in entire FIT */
+ fit_header = (const u32 *)(bmp_load_addr + header_size);
+ res = splash_storage_read_raw(location, (u32)fit_header, fit_size);
+ if (res < 0)
+ return res;
+
+ res = fit_check_format(fit_header);
+ if (!res) {
+ debug("Could not find valid FIT image\n");
+ return -EINVAL;
+ }
+
+ node_offset = fit_image_get_node(fit_header, location->name);
+ if (node_offset < 0) {
+ debug("Could not find splash image '%s' in FIT\n",
+ location->name);
+ return -ENOENT;
+ }
+
+ res = fit_image_get_data_offset(fit_header, node_offset,
+ &splash_offset);
+ if (res < 0) {
+ printf("Failed to load splash image (err=%d)\n", res);
+ return res;
+ }
+
+ res = fit_image_get_data_size(fit_header, node_offset, &splash_size);
+ if (res < 0) {
+ printf("Failed to load splash image (err=%d)\n", res);
+ return res;
+ }
+
+ /* Align data offset to 4-byte boundrary */
+ fit_size = fdt_totalsize(fit_header);
+ fit_size = (fit_size + 3) & ~3;
+
+ /* Read in the splash data */
+ location->offset = (location->offset + fit_size + splash_offset);
+ res = splash_storage_read_raw(location, bmp_load_addr , splash_size);
+ if (res < 0)
+ return res;
+
+ return 0;
+}
+#endif /* CONFIG_FIT */
+
/**
* splash_source_load - load splash image from a supported location.
*
@@ -332,6 +399,9 @@ int splash_source_load(struct splash_location *locations, uint size)
return splash_load_raw(splash_location, bmp_load_addr);
else if (splash_location->flags & SPLASH_STORAGE_FS)
return splash_load_fs(splash_location, bmp_load_addr);
-
+#ifdef CONFIG_FIT
+ else if (splash_location->flags == SPLASH_STORAGE_FIT)
+ return splash_load_fit(splash_location, bmp_load_addr);
+#endif
return -EINVAL;
}
diff --git a/doc/README.splashprepare b/doc/README.splashprepare
index 56c1bef..f1418de 100644
--- a/doc/README.splashprepare
+++ b/doc/README.splashprepare
@@ -5,7 +5,7 @@ The splash_screen_prepare() function is a weak function defined in
common/splash.c. It is called as part of the splash screen display
sequence. It gives the board an opportunity to prepare the splash
image data before it is processed and sent to the frame buffer by
-U-Boot. Define your own version to use this feature.
+U-Boot. Define your own version to use this feature.
CONFIG_SPLASH_SOURCE
@@ -20,7 +20,12 @@ splashsource works as follows:
- If splashsource is undefined, use the first splash location as default.
- If splashsource is set to an unsupported value, do not load a splash screen.
-A splash source location can describe either storage with raw data, or storage
-formatted with a file system. In case of a filesystem, the splash screen data is
-loaded as a file. The name of the splash screen file can be controlled with the
-environment variable "splashfile".
+A splash source location can describe either storage with raw data, a storage
+formatted with a file system or a FIT image. In case of a filesystem, the splash
+screen data is loaded as a file. The name of the splash screen file can be
+controlled with the environment variable "splashfile".
+
+To enable loading the splash image from a FIT image, CONFIG_FIT must be
+enabled. Struct splash_location field 'name' should match the splash image
+name within the FIT and the FIT should start at the 'offset' field address in
+the specified storage.
diff --git a/include/image.h b/include/image.h
index 2b1296c..94df589 100644
--- a/include/image.h
+++ b/include/image.h
@@ -870,6 +870,8 @@ int bootz_setup(ulong image, ulong *start, ulong *end);
/* image node */
#define FIT_DATA_PROP "data"
+#define FIT_DATA_OFFSET_PROP "data-offset"
+#define FIT_DATA_SIZE_PROP "data-size"
#define FIT_TIMESTAMP_PROP "timestamp"
#define FIT_DESC_PROP "description"
#define FIT_ARCH_PROP "arch"
@@ -948,6 +950,8 @@ int fit_image_get_load(const void *fit, int noffset, ulong *load);
int fit_image_get_entry(const void *fit, int noffset, ulong *entry);
int fit_image_get_data(const void *fit, int noffset,
const void **data, size_t *size);
+int fit_image_get_data_offset(const void *fit, int noffset, int *data_offset);
+int fit_image_get_data_size(const void *fit, int noffset, int *data_size);
int fit_image_hash_get_algo(const void *fit, int noffset, char **algo);
int fit_image_hash_get_value(const void *fit, int noffset, uint8_t **value,
diff --git a/include/splash.h b/include/splash.h
index 136eac7..228aff4 100644
--- a/include/splash.h
+++ b/include/splash.h
@@ -33,8 +33,9 @@ enum splash_storage {
};
enum splash_flags {
- SPLASH_STORAGE_RAW,
- SPLASH_STORAGE_FS,
+ SPLASH_STORAGE_RAW, /* Stored in raw memory */
+ SPLASH_STORAGE_FS, /* Stored within a file system */
+ SPLASH_STORAGE_FIT, /* Stored inside a FIT image */
};
struct splash_location {
--
2.1.4
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