kobs-ng: Add support for overriding size

By default kobs-ng will use the size of /dev/mtd0 for the IMX bootstreams.
This patch allows overriding that size in order to reserve space at the end
of the mtd partition for u-boot.img in the case of using an SPL bootloader.

For example, to flash an SPL bootloader that loads u-boot.img from 0xe0000
(14MB) offset in a 16MB /dev/mtd0:

  kobs-ng init -v -x --search_exponent=1 --chip_0_size=0xe00000 SPL
  nandwrite --start=0xe00000 --pad /dev/mtd0 u-boot.img

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

SVN-Revision: 40532

package/boot/kobs-ng/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2013 OpenWrt.org
+# Copyright (C) 2013-2014 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=kobs-ng
 PKG_VERSION:=3.0.35-4.0.0
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://repository.timesys.com/buildsources/k/kobs-ng/kobs-ng-$(PKG_VERSION)/

package/boot/kobs-ng/patches/002-add-init-size-param.patch

@@ -0,0 +1,42 @@
+--- a/src/main.c
++++ b/src/main.c
+@@ -94,6 +94,7 @@ void usage(void)
+ 	"  [KOBS] boot structures config options\n"
+ 	"    --chip_0_device_path=<path> .......... Device of boot (default /dev/mtd0)\n"
+ 	"    --chip_1_device_path=<path> .......... The second chip in case of multichip NAND\n"
++	"    --chip_0_size=<size> ................. Override size of chip_0 device\n"
+ 	"    --search_exponent=<value> ............ NCB field (default 2)\n"
+ 	"    --data_setup_time=<value> ............ NCB field (default 80)\n"
+ 	"    --data_hold_time=<value> ............. NCB field (default 60)\n"
+--- a/src/mtd.c
++++ b/src/mtd.c
+@@ -716,6 +716,11 @@ struct mtd_data *mtd_open(const struct m
+ 			goto out;
+ 		}
+ 
++		/* override MTD size */
++		if (md->cfg.chip_0_size) {
++			miu->size = md->cfg.chip_0_size;
++		}
++
+ 		/* verify it's a nand */
+ 		if (miu->type != MTD_NANDFLASH) {
+ 			fprintf(stderr, "mtd: device %s not NAND\n", mp->name);
+@@ -2914,7 +2919,7 @@ static const struct {
+ } mtd_int_args[] = {
+ 	ARG_IGNORE(chip_count),
+ 	ARG_IGNORE(chip_0_offset),
+-	ARG_IGNORE(chip_0_size),
++	ARG(chip_0_size),
+ 	ARG_IGNORE(chip_1_offset),
+ 	ARG_IGNORE(chip_1_size),
+ 	ARG(search_exponent),
+@@ -3107,7 +3112,7 @@ void mtd_cfg_dump(struct mtd_config *cfg
+ //	Pd(chip_count);
+ 	Ps(chip_0_device_path);
+ //	Pd(chip_0_offset);
+-//	Pd(chip_0_size);
++	Pd(chip_0_size);
+ 	Ps(chip_1_device_path);
+ //	Pd(chip_1_offset);
+ //	Pd(chip_1_size);