[U-Boot] [PATCH V2 3/5] splash_source: add support for filesystem formatted usb

[Nikita Kiryanov]

Add support for loading splash image from USB drive formatted with a
filesystem.

Cc: Igor Grinberg <grinb...@compulab.co.il>
Cc: Tom Rini <tr...@konsulko.com>
Signed-off-by: Nikita Kiryanov <nik...@compulab.co.il>
---
Changes in V2:
        - Refactored device initialization code so that #ifdefs are outside of
          the functions. This affects patches 3 and 4.

 common/splash_source.c | 31 ++++++++++++++++++++++++++++++-
 include/splash.h       |  1 +
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/common/splash_source.c b/common/splash_source.c
index 7de8695..cf47569 100644
--- a/common/splash_source.c
+++ b/common/splash_source.c
@@ -12,6 +12,7 @@
 #include <splash.h>
 #include <spi_flash.h>
 #include <spi.h>
+#include <usb.h>
 #include <bmp_layout.h>
 #include <fs.h>
 
@@ -112,6 +113,9 @@ static int splash_select_fs_dev(struct splash_location 
*location)
        case SPLASH_STORAGE_MMC:
                res = fs_set_blk_dev("mmc", location->devpart, FS_TYPE_ANY);
                break;
+       case SPLASH_STORAGE_USB:
+               res = fs_set_blk_dev("usb", location->devpart, FS_TYPE_ANY);
+               break;
        default:
                printf("Error: unsupported location storage.\n");
                return -ENODEV;
@@ -123,11 +127,30 @@ static int splash_select_fs_dev(struct splash_location 
*location)
        return res;
 }
 
+#ifdef CONFIG_USB_STORAGE
+static int splash_init_usb(void)
+{
+       int err;
+
+       err = usb_init();
+       if (err)
+               return err;
+
+       return usb_stor_scan(1) < 0 ? -ENODEV : 0;
+}
+#else
+static inline int splash_init_usb(void)
+{
+       printf("Cannot load splash image: no USB support\n");
+       return -ENOSYS;
+}
+#endif
+
 #define SPLASH_SOURCE_DEFAULT_FILE_NAME                "splash.bmp"
 
 static int splash_load_fs(struct splash_location *location, u32 bmp_load_addr)
 {
-       int res;
+       int res = 0;
        loff_t bmp_size;
        char *splash_file;
 
@@ -135,6 +158,12 @@ static int splash_load_fs(struct splash_location 
*location, u32 bmp_load_addr)
        if (!splash_file)
                splash_file = SPLASH_SOURCE_DEFAULT_FILE_NAME;
 
+       if (location->storage == SPLASH_STORAGE_USB)
+               res = splash_init_usb();
+
+       if (res)
+               return res;
+
        res = splash_select_fs_dev(location);
        if (res)
                return res;
diff --git a/include/splash.h b/include/splash.h
index d1fba69..b728bd6 100644
--- a/include/splash.h
+++ b/include/splash.h
@@ -28,6 +28,7 @@ enum splash_storage {
        SPLASH_STORAGE_NAND,
        SPLASH_STORAGE_SF,
        SPLASH_STORAGE_MMC,
+       SPLASH_STORAGE_USB,
 };
 
 enum splash_flags {
-- 
1.9.1

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