[RFC PATCH 10/10] FWU: cmd: Add a command to read metadata

[Sughosh Ganu <sughosh.ganu@linaro.org>]

Add a command to read the metadata as specified in the FWU
specification and print the fields of the metadata.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
---
 cmd/Kconfig        |  6 +++++
 cmd/Makefile       |  1 +
 cmd/fwu_metadata.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+)
 create mode 100644 cmd/fwu_metadata.c

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 5b30b13e43..1bf590caf0 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -137,6 +137,12 @@ config CMD_CPU
 	  internal name) and clock frequency. Other information may be
 	  available depending on the CPU driver.
 
+config CMD_FWU_METADATA
+	bool "fwu metadata read"
+	default y if FWU_MULTI_BANK_UPDATE
+	help
+	  Command to read the metadata and dump it's contents
+
 config CMD_LICENSE
 	bool "license"
 	select BUILD_BIN2C
diff --git a/cmd/Makefile b/cmd/Makefile
index 891819ae0f..9dc05dd719 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -72,6 +72,7 @@ obj-$(CONFIG_CMD_FPGA) += fpga.o
 obj-$(CONFIG_CMD_FPGAD) += fpgad.o
 obj-$(CONFIG_CMD_FS_GENERIC) += fs.o
 obj-$(CONFIG_CMD_FUSE) += fuse.o
+obj-$(CONFIG_CMD_FWU_METADATA) += fwu_metadata.o
 obj-$(CONFIG_CMD_GETTIME) += gettime.o
 obj-$(CONFIG_CMD_GPIO) += gpio.o
 obj-$(CONFIG_CMD_HVC) += smccc.o
diff --git a/cmd/fwu_metadata.c b/cmd/fwu_metadata.c
new file mode 100644
index 0000000000..3908b60dea
--- /dev/null
+++ b/cmd/fwu_metadata.c
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2021, Linaro Limited
+ */
+
+#include <command.h>
+#include <fwu_metadata.h>
+#include <stdlib.h>
+
+#include <linux/types.h>
+
+static void print_metadata(struct fwu_metadata *metadata)
+{
+	int i, j;
+	struct fwu_image_entry *img_entry;
+	struct fwu_image_bank_info *img_info;
+	u32 nimages, nbanks;
+
+	printf("\tMetadata Read\n");
+	printf("crc32: %#x\n", metadata->crc32);
+	printf("version: %#x\n", metadata->version);
+	printf("active_index: %#x\n", metadata->active_index);
+	printf("previous_active_index: %#x\n", metadata->previous_active_index);
+
+	nimages = CONFIG_FWU_NUM_IMAGES_PER_BANK;
+	nbanks = CONFIG_FWU_NUM_BANKS;
+	printf("\tImage Info\n");
+	for (i = 0; i < nimages; i++) {
+		img_entry = &metadata->img_entry[i];
+		printf("\nImage Type Guid: %pUL\n", &img_entry->image_type_uuid);
+		printf("Location Guid: %pUL\n", &img_entry->location_uuid);
+		for (j = 0; j < nbanks; j++) {
+			img_info = &img_entry->img_bank_info[j];
+			printf("Image Guid:  %pUL\n", &img_info->image_uuid);
+			printf("Image Acceptance: %#x\n", img_info->accepted);
+		}
+	}
+}
+
+int do_metadata_read(struct cmd_tbl *cmdtp, int flag,
+		     int argc, char * const argv[])
+{
+	int ret = CMD_RET_SUCCESS;
+	struct fwu_metadata *metadata;
+
+	printf("Trying to get the metadata\n");
+	ret = fwu_get_metadata(&metadata);
+	if (ret < 0) {
+		log_err("Unable to get valid metadata\n");
+		ret = CMD_RET_FAILURE;
+		goto out;
+	}
+
+	print_metadata(metadata);
+
+out:
+	free(metadata);
+	return ret;
+}
+
+U_BOOT_CMD(
+	metadata_read,	1,	1,	do_metadata_read,
+	"Read and print FWU metadata",
+	""
+);
-- 
2.17.1