From 1c063070cf6bc2b81674f60b6ad6ae0ee9b4152f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Mon, 23 Feb 2015 22:59:53 +0000
Subject: generic: early (incomplete!) 4.0 support
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 44511
---
.../405-mtd-old-firmware-uimage-splitter.patch | 70 ++++++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 target/linux/generic/patches-4.0/405-mtd-old-firmware-uimage-splitter.patch
(limited to 'target/linux/generic/patches-4.0/405-mtd-old-firmware-uimage-splitter.patch')
diff --git a/target/linux/generic/patches-4.0/405-mtd-old-firmware-uimage-splitter.patch b/target/linux/generic/patches-4.0/405-mtd-old-firmware-uimage-splitter.patch
new file mode 100644
index 0000000..fa2fdc0
--- /dev/null
+++ b/target/linux/generic/patches-4.0/405-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
+@@ -680,6 +680,37 @@ 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
+@@ -688,7 +719,14 @@ 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,
--
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