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kernel: mtdsplit_uimage: replace "edimax, uimage" parser

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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 <bjorn@mork.no>
This commit is contained in:
Bjørn Mork
2021-01-20 18:36:53 +01:00
committed by Petr Štetiar
parent 3f36dffbde
commit 402408b368
9 changed files with 60 additions and 106 deletions
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129
target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c
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@@ -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;
}