From 651083bbd9f2a63a27d185512f903eb184f1f292 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sun, 17 Jan 2016 10:41:08 +0000 Subject: [PATCH] kernel: mtdsplit: add support for EVA images This allows splitting EVA images (usually found in fritz devices). The firmware will be split into a kernel and a separate rootfs partition. Signed-off-by: Martin Blumenstingl SVN-Revision: 48262 --- target/linux/generic/config-3.18 | 1 + target/linux/generic/config-4.1 | 1 + target/linux/generic/config-4.3 | 1 + target/linux/generic/config-4.4 | 1 + .../files/drivers/mtd/mtdsplit/Kconfig | 5 + .../files/drivers/mtd/mtdsplit/Makefile | 1 + .../files/drivers/mtd/mtdsplit/mtdsplit_eva.c | 96 +++++++++++++++++++ 7 files changed, 106 insertions(+) create mode 100644 target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_eva.c diff --git a/target/linux/generic/config-3.18 b/target/linux/generic/config-3.18 index c8ba32802c..f3ec88d036 100644 --- a/target/linux/generic/config-3.18 +++ b/target/linux/generic/config-3.18 @@ -2266,6 +2266,7 @@ CONFIG_MTD_ROOTFS_SPLIT=y # CONFIG_MTD_SPINAND_MT29F is not set CONFIG_MTD_SPLIT=y # CONFIG_MTD_SPLIT_BRNIMAGE_FW is not set +# CONFIG_MTD_SPLIT_EVA_FW is not set # CONFIG_MTD_SPLIT_FIRMWARE is not set CONFIG_MTD_SPLIT_FIRMWARE_NAME="firmware" # CONFIG_MTD_SPLIT_FIT_FW is not set diff --git a/target/linux/generic/config-4.1 b/target/linux/generic/config-4.1 index ade6807b21..222f8c1c76 100644 --- a/target/linux/generic/config-4.1 +++ b/target/linux/generic/config-4.1 @@ -2358,6 +2358,7 @@ CONFIG_MTD_ROOTFS_ROOT_DEV=y # CONFIG_MTD_SPINAND_MT29F is not set CONFIG_MTD_SPLIT=y # CONFIG_MTD_SPLIT_BRNIMAGE_FW is not set +# CONFIG_MTD_SPLIT_EVA_FW is not set # CONFIG_MTD_SPLIT_FIRMWARE is not set CONFIG_MTD_SPLIT_FIRMWARE_NAME="firmware" # CONFIG_MTD_SPLIT_FIT_FW is not set diff --git a/target/linux/generic/config-4.3 b/target/linux/generic/config-4.3 index f5d8ce88a2..23e6048736 100644 --- a/target/linux/generic/config-4.3 +++ b/target/linux/generic/config-4.3 @@ -2416,6 +2416,7 @@ CONFIG_MTD_ROOTFS_ROOT_DEV=y # CONFIG_MTD_SPINAND_MT29F is not set CONFIG_MTD_SPLIT=y # CONFIG_MTD_SPLIT_BRNIMAGE_FW is not set +# CONFIG_MTD_SPLIT_EVA_FW is not set # CONFIG_MTD_SPLIT_FIRMWARE is not set CONFIG_MTD_SPLIT_FIRMWARE_NAME="firmware" # CONFIG_MTD_SPLIT_FIT_FW is not set diff --git a/target/linux/generic/config-4.4 b/target/linux/generic/config-4.4 index c27192d385..6ad3008af6 100644 --- a/target/linux/generic/config-4.4 +++ b/target/linux/generic/config-4.4 @@ -2319,6 +2319,7 @@ CONFIG_MTD_ROOTFS_ROOT_DEV=y # CONFIG_MTD_SPI_NOR_USE_4K_SECTORS is not set CONFIG_MTD_SPLIT=y # CONFIG_MTD_SPLIT_BRNIMAGE_FW is not set +# CONFIG_MTD_SPLIT_EVA_FW is not set # CONFIG_MTD_SPLIT_FIRMWARE is not set CONFIG_MTD_SPLIT_FIRMWARE_NAME="firmware" # CONFIG_MTD_SPLIT_FIT_FW is not set diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig b/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig index 0370a21c9f..131a74fd30 100644 --- a/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig @@ -54,3 +54,8 @@ config MTD_SPLIT_BRNIMAGE_FW bool "brnImage (brnboot image) firmware parser" depends on MTD_SPLIT_SUPPORT select MTD_SPLIT + +config MTD_SPLIT_EVA_FW + bool "EVA image based firmware partition parser" + depends on MTD_SPLIT_SUPPORT + select MTD_SPLIT diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile b/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile index ca24c717dc..acf799e27a 100644 --- a/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_MTD_SPLIT_LZMA_FW) += mtdsplit_lzma.o obj-$(CONFIG_MTD_SPLIT_TPLINK_FW) += mtdsplit_tplink.o obj-$(CONFIG_MTD_SPLIT_TRX_FW) += mtdsplit_trx.o obj-$(CONFIG_MTD_SPLIT_BRNIMAGE_FW) += mtdsplit_brnimage.o +obj-$(CONFIG_MTD_SPLIT_EVA_FW) += mtdsplit_eva.o diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_eva.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_eva.c new file mode 100644 index 0000000000..d262e6083e --- /dev/null +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_eva.c @@ -0,0 +1,96 @@ +/* + * Copyright (C) 2012 John Crispin + * Copyright (C) 2015 Martin Blumenstingl + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "mtdsplit.h" + +#define EVA_NR_PARTS 2 +#define EVA_MAGIC 0xfeed1281 +#define EVA_FOOTER_SIZE 0x18 +#define EVA_DUMMY_SQUASHFS_SIZE 0x100 + +struct eva_image_header { + uint32_t magic; + uint32_t size; +}; + +static int mtdsplit_parse_eva(struct mtd_info *master, + struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + struct mtd_partition *parts; + struct eva_image_header hdr; + size_t retlen; + unsigned long kernel_size, rootfs_offset; + int err; + + err = mtd_read(master, 0, sizeof(hdr), &retlen, (void *) &hdr); + if (err) + return err; + + if (retlen != sizeof(hdr)) + return -EIO; + + if (le32_to_cpu(hdr.magic) != EVA_MAGIC) + return -EINVAL; + + kernel_size = le32_to_cpu(hdr.size) + EVA_FOOTER_SIZE; + + /* rootfs starts at the next 0x10000 boundary: */ + rootfs_offset = round_up(kernel_size, 0x10000); + + /* skip the dummy EVA squashfs partition (with wrong endianness): */ + rootfs_offset += EVA_DUMMY_SQUASHFS_SIZE; + + if (rootfs_offset >= master->size) + return -EINVAL; + + err = mtd_check_rootfs_magic(master, rootfs_offset); + if (err) + return err; + + parts = kzalloc(EVA_NR_PARTS * sizeof(*parts), GFP_KERNEL); + if (!parts) + return -ENOMEM; + + parts[0].name = KERNEL_PART_NAME; + parts[0].offset = 0; + parts[0].size = kernel_size; + + parts[1].name = ROOTFS_PART_NAME; + parts[1].offset = rootfs_offset; + parts[1].size = master->size - rootfs_offset; + + *pparts = parts; + return EVA_NR_PARTS; +} + +static struct mtd_part_parser mtdsplit_eva_parser = { + .owner = THIS_MODULE, + .name = "eva-fw", + .parse_fn = mtdsplit_parse_eva, + .type = MTD_PARSER_TYPE_FIRMWARE, +}; + +static int __init mtdsplit_eva_init(void) +{ + register_mtd_parser(&mtdsplit_eva_parser); + + return 0; +} + +subsys_initcall(mtdsplit_eva_init); -- 2.25.1