From 402408b36840e078b8a98d66163d72e48ca3275b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= Date: Wed, 20 Jan 2021 18:36:53 +0100 Subject: kernel: mtdsplit_uimage: replace "edimax, uimage" parser MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The "edimax,uimage"" parser can be replaced by the generic parser using device specific openwrt,partition-magic and openwrt,offset properties. Signed-off-by: Bjørn Mork --- .../files/drivers/mtd/mtdsplit/mtdsplit_uimage.c | 129 +++++---------------- .../include/dt-bindings/mtd/partitions/uimage.h | 2 + 2 files changed, 32 insertions(+), 99 deletions(-) (limited to 'target/linux/generic') diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c index 7a8ccdf8f5..a3e55fb1fe 100644 --- a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c @@ -23,12 +23,6 @@ #include "mtdsplit.h" -/* - * uimage_header itself is only 64B, but it may be prepended with another data. - * Currently the biggest size is for Fon(Foxconn) devices: 64B + 32B - */ -#define MAX_HEADER_LEN 96 - /* * Legacy format image header, * all data in network byte order (aka natural aka bigendian). @@ -90,6 +84,32 @@ static void uimage_parse_dt(struct mtd_info *master, int *extralen, pr_debug("got openwrt,partition-magic=%08x from device-tree\n", *part_magic); } +static ssize_t uimage_verify_default(u_char *buf, u32 ih_magic, u32 ih_type) +{ + struct uimage_header *header = (struct uimage_header *)buf; + + /* default sanity checks */ + if (be32_to_cpu(header->ih_magic) != ih_magic) { + pr_debug("invalid uImage magic: %08x != %08x\n", + be32_to_cpu(header->ih_magic), ih_magic); + return -EINVAL; + } + + if (header->ih_os != IH_OS_LINUX) { + pr_debug("invalid uImage OS: %08x != %08x\n", + be32_to_cpu(header->ih_os), IH_OS_LINUX); + return -EINVAL; + } + + if (header->ih_type != ih_type) { + pr_debug("invalid uImage type: %08x != %08x\n", + be32_to_cpu(header->ih_type), ih_type); + return -EINVAL; + } + + return 0; +} + /** * __mtdsplit_parse_uimage - scan partition and create kernel + rootfs parts * @@ -98,8 +118,7 @@ static void uimage_parse_dt(struct mtd_info *master, int *extralen, */ static int __mtdsplit_parse_uimage(struct mtd_info *master, const struct mtd_partition **pparts, - struct mtd_part_parser_data *data, - ssize_t (*find_header)(u_char *buf, size_t len, u32 ih_magic, u32 ih_type)) + struct mtd_part_parser_data *data) { struct mtd_partition *parts; u_char *buf; @@ -125,7 +144,7 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master, return -ENOMEM; uimage_parse_dt(master, &extralen, &ih_magic, &ih_type, &header_offset, &part_magic); - buflen = MAX_HEADER_LEN; + buflen = sizeof(struct uimage_header) + header_offset; buf = vmalloc(buflen); if (!buf) { ret = -ENOMEM; @@ -146,16 +165,13 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master, if (header_offset && part_magic && (be32_to_cpu(*(u32 *)buf) != part_magic)) continue; - ret = find_header(buf + header_offset, buflen, ih_magic, ih_type); + ret = uimage_verify_default(buf + header_offset, ih_magic, ih_type); if (ret < 0) { pr_debug("no valid uImage found in \"%s\" at offset %llx\n", master->name, (unsigned long long) offset); continue; } - /* let uimage_find_edimax override the offset */ - if (ret > 0) - header_offset = ret; header = (struct uimage_header *)(buf + header_offset); uimage_size = sizeof(*header) + @@ -238,41 +254,6 @@ err_free_parts: return ret; } -static ssize_t uimage_verify_default(u_char *buf, size_t len, u32 ih_magic, u32 ih_type) -{ - struct uimage_header *header = (struct uimage_header *)buf; - - /* default sanity checks */ - if (be32_to_cpu(header->ih_magic) != ih_magic) { - pr_debug("invalid uImage magic: %08x != %08x\n", - be32_to_cpu(header->ih_magic), ih_magic); - return -EINVAL; - } - - if (header->ih_os != IH_OS_LINUX) { - pr_debug("invalid uImage OS: %08x != %08x\n", - be32_to_cpu(header->ih_os), IH_OS_LINUX); - return -EINVAL; - } - - if (header->ih_type != ih_type) { - pr_debug("invalid uImage type: %08x != %08x\n", - be32_to_cpu(header->ih_type), ih_type); - return -EINVAL; - } - - return 0; -} - -static int -mtdsplit_uimage_parse_generic(struct mtd_info *master, - const struct mtd_partition **pparts, - struct mtd_part_parser_data *data) -{ - return __mtdsplit_parse_uimage(master, pparts, data, - uimage_verify_default); -} - static const struct of_device_id mtdsplit_uimage_of_match_table[] = { { .compatible = "denx,uimage" }, { .compatible = "openwrt,uimage" }, @@ -283,59 +264,10 @@ static struct mtd_part_parser uimage_generic_parser = { .owner = THIS_MODULE, .name = "uimage-fw", .of_match_table = mtdsplit_uimage_of_match_table, - .parse_fn = mtdsplit_uimage_parse_generic, + .parse_fn = __mtdsplit_parse_uimage, .type = MTD_PARSER_TYPE_FIRMWARE, }; -/************************************************** - * Edimax - **************************************************/ - -#define FW_EDIMAX_OFFSET 20 -#define FW_MAGIC_EDIMAX 0x43535953 - -static ssize_t uimage_find_edimax(u_char *buf, size_t len, u32 ih_magic, u32 ih_type) -{ - u32 *magic; - - if (len < FW_EDIMAX_OFFSET + sizeof(struct uimage_header)) { - pr_err("Buffer too small for checking Edimax header\n"); - return -ENOSPC; - } - - magic = (u32 *)buf; - if (be32_to_cpu(*magic) != FW_MAGIC_EDIMAX) - return -EINVAL; - - if (!uimage_verify_default(buf + FW_EDIMAX_OFFSET, len, ih_magic, ih_type)) - return FW_EDIMAX_OFFSET; - - return -EINVAL; -} - -static int -mtdsplit_uimage_parse_edimax(struct mtd_info *master, - const struct mtd_partition **pparts, - struct mtd_part_parser_data *data) -{ - return __mtdsplit_parse_uimage(master, pparts, data, - uimage_find_edimax); -} - -static const struct of_device_id mtdsplit_uimage_edimax_of_match_table[] = { - { .compatible = "edimax,uimage" }, - {}, -}; - -static struct mtd_part_parser uimage_edimax_parser = { - .owner = THIS_MODULE, - .name = "edimax-fw", - .of_match_table = mtdsplit_uimage_edimax_of_match_table, - .parse_fn = mtdsplit_uimage_parse_edimax, - .type = MTD_PARSER_TYPE_FIRMWARE, -}; - - /************************************************** * Init **************************************************/ @@ -343,7 +275,6 @@ static struct mtd_part_parser uimage_edimax_parser = { static int __init mtdsplit_uimage_init(void) { register_mtd_parser(&uimage_generic_parser); - register_mtd_parser(&uimage_edimax_parser); return 0; } diff --git a/target/linux/generic/files/include/dt-bindings/mtd/partitions/uimage.h b/target/linux/generic/files/include/dt-bindings/mtd/partitions/uimage.h index 407e46ce2c..43d5f7b5da 100644 --- a/target/linux/generic/files/include/dt-bindings/mtd/partitions/uimage.h +++ b/target/linux/generic/files/include/dt-bindings/mtd/partitions/uimage.h @@ -192,5 +192,7 @@ * Magic values specific to "openwrt,uimage" partitions */ #define IH_MAGIC_OKLI 0x4f4b4c49 /* 'OKLI' */ +#define FW_EDIMAX_OFFSET 20 /* Edimax Firmware Offset */ +#define FW_MAGIC_EDIMAX 0x43535953 /* Edimax Firmware Magic Number */ #endif /* __UIMAGE_H__ */ -- cgit v1.2.3