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kernel: mtdsplit_uimage: add "openwrt, ih-type" device-tree property

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Some devices use uimage headers with a non-default ih_type. Add
support for overriding this in device tree.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
This commit is contained in:
Bjørn Mork
2021-01-20 18:36:50 +01:00
committed by Petr Štetiar
parent 647fdafcc5
commit de64d4b958
1 changed files with 14 additions and 10 deletions
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24
target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c
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@@ -69,7 +69,8 @@ read_uimage_header(struct mtd_info *mtd, size_t offset, u_char *buf,
return 0;
}
static void uimage_parse_dt(struct mtd_info *master, int *extralen, u32 *ih_magic)
static void uimage_parse_dt(struct mtd_info *master, int *extralen,
u32 *ih_magic, u32 *ih_type)
{
struct device_node *np = mtd_get_of_node(master);
@@ -80,6 +81,8 @@ static void uimage_parse_dt(struct mtd_info *master, int *extralen, u32 *ih_magi
pr_debug("got openwrt,padding=%d from device-tree\n", *extralen);
if (!of_property_read_u32(np, "openwrt,ih-magic", ih_magic))
pr_debug("got openwrt,ih-magic=%08x from device-tree\n", *ih_magic);
if (!of_property_read_u32(np, "openwrt,ih-type", ih_type))
pr_debug("got openwrt,ih-type=%08x from device-tree\n", *ih_type);
}
/**
@@ -91,7 +94,7 @@ static void uimage_parse_dt(struct mtd_info *master, int *extralen, u32 *ih_magi
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))
ssize_t (*find_header)(u_char *buf, size_t len, u32 ih_magic, u32 ih_type))
{
struct mtd_partition *parts;
u_char *buf;
@@ -105,6 +108,7 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master,
int ret;
int extralen = 0;
u32 ih_magic = IH_MAGIC;
u32 ih_type = IH_TYPE_KERNEL;
enum mtdsplit_part_type type;
nr_parts = 2;
@@ -118,7 +122,7 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master,
goto err_free_parts;
}
uimage_parse_dt(master, &extralen, &ih_magic);
uimage_parse_dt(master, &extralen, &ih_magic, &ih_type);
/* find uImage on erase block boundaries */
for (offset = 0; offset < master->size; offset += master->erasesize) {
@@ -130,7 +134,7 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master,
if (ret)
continue;
ret = find_header(buf, MAX_HEADER_LEN, ih_magic);
ret = find_header(buf, MAX_HEADER_LEN, 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);
@@ -218,7 +222,7 @@ err_free_parts:
return ret;
}
static ssize_t uimage_verify_default(u_char *buf, size_t len, u32 ih_magic)
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;
@@ -235,9 +239,9 @@ static ssize_t uimage_verify_default(u_char *buf, size_t len, u32 ih_magic)
return -EINVAL;
}
if (header->ih_type != IH_TYPE_KERNEL) {
if (header->ih_type != ih_type) {
pr_debug("invalid uImage type: %08x != %08x\n",
be32_to_cpu(header->ih_type), IH_TYPE_KERNEL);
be32_to_cpu(header->ih_type), ih_type);
return -EINVAL;
}
@@ -279,7 +283,7 @@ static struct mtd_part_parser uimage_generic_parser = {
#define FW_MAGIC_WNDR3700V2 0x33373031
#define FW_MAGIC_WPN824N 0x31313030
static ssize_t uimage_verify_wndr3700(u_char *buf, size_t len, u32 ih_magic)
static ssize_t uimage_verify_wndr3700(u_char *buf, size_t len, u32 ih_magic, u32 ih_type)
{
struct uimage_header *header = (struct uimage_header *)buf;
uint8_t expected_type = IH_TYPE_FILESYSTEM;
@@ -340,7 +344,7 @@ static struct mtd_part_parser uimage_netgear_parser = {
#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)
static ssize_t uimage_find_edimax(u_char *buf, size_t len, u32 ih_magic, u32 ih_type)
{
u32 *magic;
@@ -353,7 +357,7 @@ static ssize_t uimage_find_edimax(u_char *buf, size_t len, u32 ih_magic)
if (be32_to_cpu(*magic) != FW_MAGIC_EDIMAX)
return -EINVAL;
if (!uimage_verify_default(buf + FW_EDIMAX_OFFSET, len, ih_magic))
if (!uimage_verify_default(buf + FW_EDIMAX_OFFSET, len, ih_magic, ih_type))
return FW_EDIMAX_OFFSET;
return -EINVAL;