kernel: move mtdsplit files to drivers/mtd/mtdsplit/ to simplify maintenance, unify...

[openwrt.git] / target / linux / generic / patches-3.18 / 405-mtd-old-firmware-uimage-splitter.patch

diff --git a/target/linux/generic/patches-3.18/405-mtd-old-firmware-uimage-splitter.patch b/target/linux/generic/patches-3.18/405-mtd-old-firmware-uimage-splitter.patch
new file mode 100644 (file)
index 0000000..a19202a
--- /dev/null
+++ b/target/linux/generic/patches-3.18/405-mtd-old-firmware-uimage-splitter.patch
@@ -0,0 +1,70 @@
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -27,6 +27,11 @@ config MTD_SPLIT_FIRMWARE_NAME
+       depends on MTD_SPLIT_FIRMWARE
+       default "firmware"
+ 
++config MTD_UIMAGE_SPLIT
++      bool "Enable split support for firmware partitions containing a uImage"
++      depends on MTD_SPLIT_FIRMWARE
++      default y
++
+ source "drivers/mtd/mtdsplit/Kconfig"
+ 
+ endmenu
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -681,6 +681,37 @@ mtd_pad_erasesize(struct mtd_info *mtd, 
+       return len;
+ }
+ 
++#define UBOOT_MAGIC   0x27051956
++
++static void split_uimage(struct mtd_info *master, struct mtd_part *part)
++{
++      struct {
++              __be32 magic;
++              __be32 pad[2];
++              __be32 size;
++      } hdr;
++      size_t len;
++
++      if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
++              return;
++
++      if (len != sizeof(hdr) || hdr.magic != cpu_to_be32(UBOOT_MAGIC))
++              return;
++
++      len = be32_to_cpu(hdr.size) + 0x40;
++      len = mtd_pad_erasesize(master, part->offset, len);
++      if (len + master->erasesize > part->mtd.size)
++              return;
++
++      if (config_enabled(CONFIG_MTD_SPLIT_UIMAGE_FW))
++              pr_err("Dedicated partitioner didn't split firmware partition, please fill a bug report!\n");
++      else
++              pr_warn("Support for built-in firmware splitter will be removed, please use CONFIG_MTD_SPLIT_UIMAGE_FW\n");
++
++      __mtd_add_partition(master, "rootfs", part->offset + len,
++                          part->mtd.size - len, false);
++}
++
+ #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
+ #define SPLIT_FIRMWARE_NAME   CONFIG_MTD_SPLIT_FIRMWARE_NAME
+ #else
+@@ -689,7 +720,14 @@ mtd_pad_erasesize(struct mtd_info *mtd, 
+ 
+ static void split_firmware(struct mtd_info *master, struct mtd_part *part)
+ {
+-      run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
++      int ret;
++
++      ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
++      if (ret > 0)
++              return;
++
++      if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
++              split_uimage(master, part);
+ }
+ 
+ void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,