kernel/3.10: add new Kconfig option for firmware partition split

Add a new kernel config option for generic firmware partition
split support and change the uImage split support to depend on
the new option. Aslo rename the MTD_UIMAGE_SPLIT_NAME option to
MTD_SPLIT_FIRMWARE_NAME to make it more generic.

The patch is in preparation for multiple firmware format
support.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38002 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 31 insertions, 22 deletions

diff --git a/target/linux/generic/config-3.10 b/target/linux/generic/config-3.10
index 3cf5bb2e03..0f3b78f2a7 100644
--- a/target/linux/generic/config-3.10
+++ b/target/linux/generic/config-3.10
@@ -1931,12 +1931,13 @@ CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-1
 CONFIG_MTD_ROOTFS_ROOT_DEV=y
 CONFIG_MTD_ROOTFS_SPLIT=y
 # CONFIG_MTD_SLRAM is not set
+# CONFIG_MTD_SPLIT_FIRMWARE is not set
+CONFIG_MTD_SPLIT_FIRMWARE_NAME="firmware"
 # CONFIG_MTD_SST25L is not set
 # CONFIG_MTD_SWAP is not set
 # CONFIG_MTD_TESTS is not set
 # CONFIG_MTD_UBI is not set
 # CONFIG_MTD_UIMAGE_SPLIT is not set
-CONFIG_MTD_UIMAGE_SPLIT_NAME="firmware"
 # CONFIG_MUTEX_SPIN_ON_OWNER is not set
 # CONFIG_MV643XX_ETH is not set
 # CONFIG_MVMDIO is not set
diff --git a/target/linux/generic/patches-3.10/400-mtd-add-rootfs-split-support.patch b/target/linux/generic/patches-3.10/400-mtd-add-rootfs-split-support.patch
index edbb704115..6a4c16134e 100644
--- a/target/linux/generic/patches-3.10/400-mtd-add-rootfs-split-support.patch
+++ b/target/linux/generic/patches-3.10/400-mtd-add-rootfs-split-support.patch
@@ -1,6 +1,6 @@
 --- a/drivers/mtd/Kconfig
 +++ b/drivers/mtd/Kconfig
-@@ -12,6 +12,27 @@ menuconfig MTD
+@@ -12,6 +12,32 @@ menuconfig MTD
  
  if MTD
  
@@ -14,15 +14,20 @@
 +	bool "Automatically split 'rootfs' partition for squashfs"
 +	default y
 +
-+config MTD_UIMAGE_SPLIT
-+	bool "Automatically split off rootfs from a kernel partition containing a uImage"
++config MTD_SPLIT_FIRMWARE
++	bool "Automatically split firmware partition for kernel+rootfs"
 +	default y
 +
-+config MTD_UIMAGE_SPLIT_NAME
-+	string "uImage partition name"
-+	depends on MTD_UIMAGE_SPLIT
++config MTD_SPLIT_FIRMWARE_NAME
++	string "Firmware partition 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
++
 +endmenu
 +
  config MTD_TESTS
@@ -116,7 +121,7 @@
  int mtd_del_partition(struct mtd_info *master, int partno)
  {
  	struct mtd_part *slave, *next;
-@@ -613,6 +627,148 @@ int mtd_del_partition(struct mtd_info *m
+@@ -613,6 +627,151 @@ int mtd_del_partition(struct mtd_info *m
  }
  EXPORT_SYMBOL_GPL(mtd_del_partition);
  
@@ -196,12 +201,6 @@
 +
 +#define UBOOT_MAGIC	0x27051956
 +
-+#ifdef CONFIG_MTD_UIMAGE_SPLIT_NAME
-+#define UIMAGE_SPLIT_NAME	CONFIG_MTD_UIMAGE_SPLIT_NAME
-+#else
-+#define UIMAGE_SPLIT_NAME	"unused"
-+#endif
-+
 +static void split_uimage(struct mtd_info *master, struct mtd_part *part)
 +{
 +	struct {
@@ -211,9 +210,6 @@
 +	} hdr;
 +	size_t len;
 +
-+	if (strcmp(part->mtd.name, UIMAGE_SPLIT_NAME) != 0)
-+		return;
-+
 +	if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
 +		return;
 +
@@ -229,12 +225,23 @@
 +			    part->mtd.size - len, false);
 +}
 +
++#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
++#define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
++#else
++#define SPLIT_FIRMWARE_NAME	"unused"
++#endif
++
++static void split_firmware(struct mtd_info *master, struct mtd_part *part)
++{
++	if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
++		split_uimage(master, part);
++}
++
 +void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
 +                                int offset, int size)
 +{
 +}
 +
-+
 +static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
 +{
 +	static int rootfs_found = 0;
@@ -256,8 +263,9 @@
 +			split_rootfs_data(master, part);
 +	}
 +
-+	if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
-+		split_uimage(master, part);
++	if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
++	    config_enabled(CONFIG_MTD_SPLIT_FIRMWARE))
++		split_firmware(master, part);
 +
 +	arch_split_mtd_part(master, part->mtd.name, part->offset,
 +			    part->mtd.size);
@@ -265,7 +273,7 @@
  /*
   * This function, given a master MTD object and a partition table, creates
   * and registers slave MTD objects which are bound to the master according to
-@@ -642,6 +798,7 @@ int add_mtd_partitions(struct mtd_info *
+@@ -642,6 +801,7 @@ int add_mtd_partitions(struct mtd_info *
  		mutex_unlock(&mtd_partitions_mutex);
  
  		add_mtd_device(&slave->mtd);
diff --git a/target/linux/generic/patches-3.10/430-mtd-add-myloader-partition-parser.patch b/target/linux/generic/patches-3.10/430-mtd-add-myloader-partition-parser.patch
index 4b61307c37..bca00230ae 100644
--- a/target/linux/generic/patches-3.10/430-mtd-add-myloader-partition-parser.patch
+++ b/target/linux/generic/patches-3.10/430-mtd-add-myloader-partition-parser.patch
@@ -1,6 +1,6 @@
 --- a/drivers/mtd/Kconfig
 +++ b/drivers/mtd/Kconfig
-@@ -176,6 +176,22 @@ config MTD_BCM47XX_PARTS
+@@ -181,6 +181,22 @@ config MTD_BCM47XX_PARTS
  	  This provides partitions parser for devices based on BCM47xx
  	  boards.