uboot: updating the default uboot to 2012.07

This is what I use in the sheevplug, with the provided patches.
The old sheevaplug uboot doesn't understand ubifs.

pkgs/misc/uboot/default.nix

@@ -20,11 +20,11 @@ let
 in
 
 stdenv.mkDerivation {
-  name = "uboot-2009.11";
+  name = "uboot-2012.07";
    
   src = fetchurl {
-    url = "ftp://ftp.denx.de/pub/u-boot/u-boot-2009.11.tar.bz2";
-    sha256 = "1rld7q3ww89si84g80hqskd1z995lni5r5xc4d4322n99wqiarh6";
+    url = "ftp://ftp.denx.de/pub/u-boot/u-boot-2012.07.tar.bz2";
+    sha256 = "15nli6h9a127ldizsck3g4ysy5j4m910wawspgpadz4vjyk213p0";
   };
 
   buildNativeInputs = [ unzip ];
@@ -40,6 +40,15 @@ stdenv.mkDerivation {
     cp tools/{envcrc,mkimage} $out/bin
   '';
 
+  # They have 'errno.h' included by a "-idirafter". As the gcc
+  # wrappers add the glibc include as "-idirafter", the only way
+  # we can make the glibc take priority is to -include errno.h.
+  postPatch = if stdenv ? glibc && stdenv.glibc != null then ''
+    sed -i 's,$(HOSTCPPFLAGS),-include ${stdenv.glibc}/include/errno.h $(HOSTCPPFLAGS),' config.mk
+  '' else "";
+
+  patches = [ ./sheevaplug-sdio.patch ./sheevaplug-config.patch ];
+
   configurePhase =
     assert platform ? uboot && platform.uboot != null;
     assert (platform ? ubootConfig);

pkgs/misc/uboot/sheevaplug-config.patch

@@ -0,0 +1,57 @@
+diff --git a/include/configs/sheevaplug.h b/include/configs/sheevaplug.h
+index 7c8497c..b0da1e5 100644
+--- a/include/configs/sheevaplug.h
++++ b/include/configs/sheevaplug.h
+@@ -50,7 +50,6 @@
+ #define CONFIG_CMD_MII
+ #define CONFIG_CMD_MMC
+ #define CONFIG_CMD_NAND
+-#define CONFIG_JFFS2_NAND
+ #define CONFIG_CMD_PING
+ #define CONFIG_CMD_USB
+ /*
+@@ -73,25 +72,36 @@
+  * it has to be rounded to sector size
+  */
+ #define CONFIG_ENV_SIZE			0x20000	/* 128k */
+-#define CONFIG_ENV_ADDR			0xa0000
+-#define CONFIG_ENV_OFFSET		0xa0000	/* env starts here */
++#define CONFIG_ENV_ADDR			0x60000
++#define CONFIG_ENV_OFFSET		0x60000	/* env starts here */
+ 
+ /*
+  * Default environment variables
+  */
+-#define CONFIG_BOOTCOMMAND		"${x_bootcmd_kernel}; "	\
++#define CONFIG_BOOTCOMMAND		"${x_bootcmd_ubi0}; "	\
++	"${x_bootcmd_ubi1}; " \
++	"${x_bootcmd_ubi2}; " \
++	"${x_bootcmd_ubi3}; " \
+ 	"setenv bootargs ${x_bootargs} ${x_bootargs_root}; "	\
+-	"${x_bootcmd_usb}; bootm 0x6400000;"
++	"${x_bootcmd_usb}; bootm 0x200000 0x1100000;"
+ 
+ #define CONFIG_MTDPARTS		"orion_nand:512k(uboot),"	\
+-	"0x1ff00000@512k(rootfs) rw\0"
++	"0x1ff00000@512k(rootfs)\0"
++#define CONFIG_MTDPARTSK		"orion_nand:512k(uboot),"	\
++	"0x1ff00000@512k(rootfs)rw\0"
+ 
+ #define CONFIG_EXTRA_ENV_SETTINGS	"x_bootargs=console"	\
+-	"=ttyS0,115200 mtdparts="CONFIG_MTDPARTS	\
++	"=ttyS0,115200 mtdparts="CONFIG_MTDPARTSK	\
++	"mtdparts=mtdparts="CONFIG_MTDPARTS	\
+ 	"mtdids=nand0=orion_nand\0"	\
+-	"x_bootcmd_kernel=nand read 0x6400000 0x100000 0x300000\0" \
++	"ipaddr=192.168.1.4\0"	\
++	"x_bootcmd_ubi0=ubi part nand0,1\0" \
++	"x_bootcmd_ubi1=ubifsmount rootfs\0" \
++	"x_bootcmd_ubi2=ubifsload 0x200000 /nixos-kernel\0" \
++	"x_bootcmd_ubi3=ubifsload 0x1100000 /nixos-initrd\0" \
+ 	"x_bootcmd_usb=usb start\0" \
+-	"x_bootargs_root=root=/dev/mtdblock3 rw rootfstype=jffs2\0"
++	"x_bootargs_root=ubi.mtd=rootfs root=ubi0:rootfs rw rootfstype=ubifs " \
++	"init=/boot/nixos-init systemConfig=/boot/default/system\0"
+ 
+ /*
+  * Ethernet Driver configuration