[RESEND RFC PATCH 05/10] FWU: stm32mp1: Add helper functions for accessing metadata

[Sughosh Ganu]

Add helper functions needed for accessing the metadata which contains
information on the updatable images. These functions have been added
for the STM32MP157C-DK2 board which has the updatable images on the
uSD card, formatted as GPT partitions.

Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
---
 board/st/stm32mp1/stm32mp1.c | 63 ++++++++++++++++++++++++++++++++++++
 include/fwu_metadata.h       |  3 ++
 2 files changed, 66 insertions(+)

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 84592677e4..a6884d2772 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -7,6 +7,7 @@
 
 #include <common.h>
 #include <adc.h>
+#include <blk.h>
 #include <bootm.h>
 #include <clk.h>
 #include <config.h>
@@ -14,6 +15,7 @@
 #include <env.h>
 #include <env_internal.h>
 #include <fdt_support.h>
+#include <fwu_metadata.h>
 #include <g_dnl.h>
 #include <generic-phy.h>
 #include <hang.h>
@@ -23,6 +25,7 @@
 #include <log.h>
 #include <malloc.h>
 #include <misc.h>
+#include <mmc.h>
 #include <mtd_node.h>
 #include <net.h>
 #include <netdev.h>
@@ -938,3 +941,63 @@ static void board_copro_image_process(ulong fw_image, size_t fw_size)
 }
 
 U_BOOT_FIT_LOADABLE_HANDLER(IH_TYPE_COPRO, board_copro_image_process);
+
+#ifdef CONFIG_FWU_MULTI_BANK_UPDATE
+
+int fwu_plat_get_update_index(u32 *update_idx)
+{
+	int ret;
+	u32 active_idx;
+
+	ret = fwu_get_active_index(&active_idx);
+
+	if (ret < 0)
+		return -1;
+
+	*update_idx = active_idx ^= 0x1;
+
+	return ret;
+}
+
+int fwu_plat_get_blk_desc(struct blk_desc **desc)
+{
+	int ret;
+	struct mmc *mmc;
+	struct udevice *dev;
+
+	/*
+	 * Initial support is being added for the DK2
+	 * platform
+	 */
+	if (CONFIG_IS_ENABLED(TARGET_ST_STM32MP15x) &&
+	    (of_machine_is_compatible("st,stm32mp157c-dk2"))) {
+		ret = uclass_get_device(UCLASS_MMC, 0, &dev);
+		if (ret)
+			return -1;
+
+		mmc = mmc_get_mmc_dev(dev);
+		if (!mmc)
+			return -1;
+
+		if (mmc_init(mmc))
+			return -1;
+
+		*desc = mmc_get_blk_desc(mmc);
+		if (!*desc)
+			return -1;
+	}
+
+	return 0;
+}
+
+struct fwu_metadata_ops *get_plat_fwu_metadata_ops(void)
+{
+	if (CONFIG_IS_ENABLED(TARGET_ST_STM32MP15x) &&
+	    (of_machine_is_compatible("st,stm32mp157c-dk2"))) {
+		return &fwu_gpt_blk_ops;
+	}
+
+	return NULL;
+}
+
+#endif /* CONFIG_FWU_MULTI_BANK_UPDATE */
diff --git a/include/fwu_metadata.h b/include/fwu_metadata.h
index e692ef7506..6a5e814ab6 100644
--- a/include/fwu_metadata.h
+++ b/include/fwu_metadata.h
@@ -122,4 +122,7 @@ int fwu_accept_image(efi_guid_t *img_type_id);
 int fwu_clear_accept_image(efi_guid_t *img_type_id, u32 bank);
 int fwu_get_metadata(struct fwu_metadata **metadata);
 
+int fwu_plat_get_update_index(u32 *update_idx);
+int fwu_plat_get_blk_desc(struct blk_desc **desc);
+
 #endif /* _FWU_METADATA_H_ */
-- 
2.17.1