avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/common/fb_mmc.c

@@ -0,0 +1,204 @@
+/*
+ * Copyright 2014 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <blk.h>
+#include <fastboot.h>
+#include <fb_mmc.h>
+#include <image-sparse.h>
+#include <part.h>
+#include <mmc.h>
+#include <div64.h>
+
+#ifndef CONFIG_FASTBOOT_GPT_NAME
+#define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
+#endif
+
+struct fb_mmc_sparse {
+	struct blk_desc	*dev_desc;
+};
+
+static int part_get_info_efi_by_name_or_alias(struct blk_desc *dev_desc,
+		const char *name, disk_partition_t *info)
+{
+	int ret;
+
+	ret = part_get_info_efi_by_name(dev_desc, name, info);
+	if (ret) {
+		/* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
+		char env_alias_name[25 + 32 + 1];
+		char *aliased_part_name;
+
+		/* check for alias */
+		strcpy(env_alias_name, "fastboot_partition_alias_");
+		strncat(env_alias_name, name, 32);
+		aliased_part_name = getenv(env_alias_name);
+		if (aliased_part_name != NULL)
+			ret = part_get_info_efi_by_name(dev_desc,
+					aliased_part_name, info);
+	}
+	return ret;
+}
+
+static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
+		lbaint_t blk, lbaint_t blkcnt, const void *buffer)
+{
+	struct fb_mmc_sparse *sparse = info->priv;
+	struct blk_desc *dev_desc = sparse->dev_desc;
+
+	return blk_dwrite(dev_desc, blk, blkcnt, buffer);
+}
+
+static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
+		lbaint_t blk, lbaint_t blkcnt)
+{
+	return blkcnt;
+}
+
+static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
+		const char *part_name, void *buffer,
+		unsigned int download_bytes)
+{
+	lbaint_t blkcnt;
+	lbaint_t blks;
+
+	/* determine number of blocks to write */
+	blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
+	blkcnt = lldiv(blkcnt, info->blksz);
+
+	if (blkcnt > info->size) {
+		error("too large for partition: '%s'\n", part_name);
+		fastboot_fail("too large for partition");
+		return;
+	}
+
+	puts("Flashing Raw Image\n");
+
+	blks = blk_dwrite(dev_desc, info->start, blkcnt, buffer);
+	if (blks != blkcnt) {
+		error("failed writing to device %d\n", dev_desc->devnum);
+		fastboot_fail("failed writing to device");
+		return;
+	}
+
+	printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
+	       part_name);
+	fastboot_okay("");
+}
+
+void fb_mmc_flash_write(const char *cmd, void *download_buffer,
+			unsigned int download_bytes)
+{
+	struct blk_desc *dev_desc;
+	disk_partition_t info;
+
+	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
+	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
+		error("invalid mmc device\n");
+		fastboot_fail("invalid mmc device");
+		return;
+	}
+
+	if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
+		printf("%s: updating MBR, Primary and Backup GPT(s)\n",
+		       __func__);
+		if (is_valid_gpt_buf(dev_desc, download_buffer)) {
+			printf("%s: invalid GPT - refusing to write to flash\n",
+			       __func__);
+			fastboot_fail("invalid GPT partition");
+			return;
+		}
+		if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
+			printf("%s: writing GPT partitions failed\n", __func__);
+			fastboot_fail(
+				      "writing GPT partitions failed");
+			return;
+		}
+		printf("........ success\n");
+		fastboot_okay("");
+		return;
+	} else if (part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
+		error("cannot find partition: '%s'\n", cmd);
+		fastboot_fail("cannot find partition");
+		return;
+	}
+
+	if (is_sparse_image(download_buffer)) {
+		struct fb_mmc_sparse sparse_priv;
+		struct sparse_storage sparse;
+
+		sparse_priv.dev_desc = dev_desc;
+
+		sparse.blksz = info.blksz;
+		sparse.start = info.start;
+		sparse.size = info.size;
+		sparse.write = fb_mmc_sparse_write;
+		sparse.reserve = fb_mmc_sparse_reserve;
+
+		printf("Flashing sparse image at offset " LBAFU "\n",
+		       sparse.start);
+
+		sparse.priv = &sparse_priv;
+		write_sparse_image(&sparse, cmd, download_buffer,
+				   download_bytes);
+	} else {
+		write_raw_image(dev_desc, &info, cmd, download_buffer,
+				download_bytes);
+	}
+}
+
+void fb_mmc_erase(const char *cmd)
+{
+	int ret;
+	struct blk_desc *dev_desc;
+	disk_partition_t info;
+	lbaint_t blks, blks_start, blks_size, grp_size;
+	struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
+
+	if (mmc == NULL) {
+		error("invalid mmc device");
+		fastboot_fail("invalid mmc device");
+		return;
+	}
+
+	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
+	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
+		error("invalid mmc device");
+		fastboot_fail("invalid mmc device");
+		return;
+	}
+
+	ret = part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info);
+	if (ret) {
+		error("cannot find partition: '%s'", cmd);
+		fastboot_fail("cannot find partition");
+		return;
+	}
+
+	/* Align blocks to erase group size to avoid erasing other partitions */
+	grp_size = mmc->erase_grp_size;
+	blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
+	if (info.size >= grp_size)
+		blks_size = (info.size - (blks_start - info.start)) &
+				(~(grp_size - 1));
+	else
+		blks_size = 0;
+
+	printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
+	       blks_start, blks_start + blks_size);
+
+	blks = dev_desc->block_erase(dev_desc, blks_start, blks_size);
+	if (blks != blks_size) {
+		error("failed erasing from device %d", dev_desc->devnum);
+		fastboot_fail("failed erasing from device");
+		return;
+	}
+
+	printf("........ erased " LBAFU " bytes from '%s'\n",
+	       blks_size * info.blksz, cmd);
+	fastboot_okay("");
+}