uboot-envtools: add support for environment in ubi volume

On UBI enabled devices, U-Boot might store it's environment on
UBI volume(s). Support this in uboot-envtools, so fw_setenv and
fw_printenv can work on these platforms.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 40929

package/boot/uboot-envtools/Config.in

@@ -0,0 +1,9 @@
+config UBOOT_ENVTOOLS_UBI
+	bool "Support environment in UBI volume"
+	depends on PACKAGE_uboot-envtools
+	default n
+	help
+		Add support for reading and writing U-Boot environment
+		stored in UBI volume(s).
+
+		Increases binary size by about 8 kB

package/boot/uboot-envtools/Makefile

@@ -21,6 +21,8 @@ PKG_MD5SUM:=6d2116d1385a66e9a59742caa9d62a54
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/u-boot-$(PKG_VERSION)
 
+PKG_BUILD_DEPENDS:=+fstools
+
 include $(INCLUDE_DIR)/package.mk
 
 define Package/uboot-envtools
@@ -34,15 +36,22 @@ define Package/uboot-envtools/description
  This package includes tools to read and modify U-Boot bootloader environment.
 endef
 
+define Package/uboot-envtools/config
+	source "$(SOURCE)/Config.in"
+endef
+
 define Build/Configure
 	touch $(PKG_BUILD_DIR)/include/config.mk
 	touch $(PKG_BUILD_DIR)/include/config.h
 endef
 
+TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
+
 define Build/Compile
 	$(MAKE) -C $(PKG_BUILD_DIR) \
 		CROSS_COMPILE="$(TARGET_CROSS)" \
 		TARGET_CFLAGS="$(TARGET_CFLAGS)" \
+		UBI="$(CONFIG_UBOOT_ENVTOOLS_UBI)" \
 		env
 endef
 

package/boot/uboot-envtools/patches/300-support-env-in-ubivol-chardev.patch

@@ -0,0 +1,166 @@
+From ee2c9e3aef32c05b1d7891858baff19bffed1652 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Mon, 19 May 2014 21:38:01 +0200
+Subject: [PATCH] tools/env: add support for env in ubi volume chardev
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ tools/env/Makefile |  5 ++++
+ tools/env/fw_env.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++--------
+ 2 files changed, 69 insertions(+), 10 deletions(-)
+
+diff --git a/tools/env/Makefile b/tools/env/Makefile
+index f5368bc..d006a93 100644
+--- a/tools/env/Makefile
++++ b/tools/env/Makefile
+@@ -20,6 +20,11 @@ ifeq ($(MTD_VERSION),old)
+ HOST_EXTRACFLAGS += -DMTD_OLD
+ endif
+ 
++ifeq ($(UBI),y)
++HOST_EXTRACFLAGS += -DUBI
++HOST_LOADLIBES = "-Wl,--gc-sections,-lubi-utils"
++endif
++
+ always := fw_printenv
+ hostprogs-y := fw_printenv_unstripped
+ 
+diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
+index 30d5b03..5c0acd5 100644
+--- a/tools/env/fw_env.c
++++ b/tools/env/fw_env.c
+@@ -29,6 +29,9 @@
+ # include <mtd/mtd-user.h>
+ #endif
+ 
++#ifdef UBI
++# include <libubi.h>
++#endif
+ #include "fw_env.h"
+ 
+ #include <aes.h>
+@@ -809,6 +812,11 @@ static int flash_write_buf (int dev, int fd, void *buf, size_t count,
+ 	off_t top_of_range;	/* end of the last block we may use */
+ 	loff_t blockstart;	/* running start of the current block -
+ 				   MEMGETBADBLOCK needs 64 bits */
++#ifdef UBI
++	libubi_t *libubi = NULL;/* pointer to libubi struct */
++#else
++	void *libubi = NULL;
++#endif
+ 	int rc;
+ 
+ 	/*
+@@ -914,7 +922,30 @@ static int flash_write_buf (int dev, int fd, void *buf, size_t count,
+ 			continue;
+ 		}
+ 
+-		if (mtd_type != MTD_ABSENT) {
++#ifdef UBI
++		if (mtd_type == MTD_UBIVOLUME) {
++			struct ubi_vol_info volinfo;
++			libubi = libubi_open();
++			if (libubi)
++				rc = ubi_get_vol_info(libubi,
++					DEVNAME(dev_current), &volinfo);
++			if (libubi && !rc) {
++				erasesize = volinfo.leb_size;
++				int leb = blockstart / erasesize;
++				if (volinfo.type != UBI_STATIC_VOLUME)
++					rc = ubi_leb_change_start(libubi, fd,
++						leb, erasesize);
++				else
++					rc = ubi_update_start(libubi, fd,
++						erasesize);
++			}
++			if (libubi && rc) {
++				libubi_close(libubi);
++				libubi = NULL;
++			}
++		}
++#endif
++		if (!libubi && mtd_type != MTD_ABSENT) {
+ 			erase.start = blockstart;
+ 			ioctl(fd, MEMUNLOCK, &erase);
+ 			/* These do not need an explicit erase cycle */
+@@ -931,7 +962,8 @@ static int flash_write_buf (int dev, int fd, void *buf, size_t count,
+ 			fprintf (stderr,
+ 				 "Seek error on %s: %s\n",
+ 				 DEVNAME (dev), strerror (errno));
+-			return -1;
++			processed = -1;
++			goto out;
+ 		}
+ 
+ #ifdef DEBUG
+@@ -941,10 +973,11 @@ static int flash_write_buf (int dev, int fd, void *buf, size_t count,
+ 		if (write (fd, data + processed, erasesize) != erasesize) {
+ 			fprintf (stderr, "Write error on %s: %s\n",
+ 				 DEVNAME (dev), strerror (errno));
+-			return -1;
++			processed = -1;
++			goto out;
+ 		}
+ 
+-		if (mtd_type != MTD_ABSENT)
++		if (!libubi && mtd_type != MTD_ABSENT)
+ 			ioctl(fd, MEMLOCK, &erase);
+ 
+ 		processed  += erasesize;
+@@ -955,6 +988,9 @@ static int flash_write_buf (int dev, int fd, void *buf, size_t count,
+ 	if (write_total > count)
+ 		free (data);
+ 
++out:
++	if (libubi)
++		libubi_close(libubi);
+ 	return processed;
+ }
+ 
+@@ -1066,12 +1102,8 @@ static int flash_read (int fd)
+ 
+ 	if (S_ISCHR(st.st_mode)) {
+ 		rc = ioctl(fd, MEMGETINFO, &mtdinfo);
+-		if (rc < 0) {
+-			fprintf(stderr, "Cannot get MTD information for %s\n",
+-				DEVNAME(dev_current));
+-			return -1;
+-		}
+-		if (mtdinfo.type != MTD_NORFLASH &&
++		if (!rc &&
++		    mtdinfo.type != MTD_NORFLASH &&
+ 		    mtdinfo.type != MTD_NANDFLASH &&
+ 		    mtdinfo.type != MTD_DATAFLASH &&
+ 		    mtdinfo.type != MTD_UBIVOLUME) {
+@@ -1079,6 +1111,28 @@ static int flash_read (int fd)
+ 				 mtdinfo.type, DEVNAME(dev_current));
+ 			return -1;
+ 		}
++#ifdef UBI
++		if (rc) {
++			libubi_t *libubi;
++			struct ubi_vol_info volinfo;
++			libubi = libubi_open();
++			if (!libubi)
++				return -ENOMEM;
++
++			rc = ubi_get_vol_info(libubi, DEVNAME(dev_current),
++						&volinfo);
++			if (rc) {
++				libubi_close(libubi);
++				return -ENODEV;
++			}
++			memset(&mtdinfo, 0, sizeof(mtdinfo));
++			mtdinfo.type = MTD_UBIVOLUME;
++			mtdinfo.size = volinfo.data_bytes;
++			mtdinfo.erasesize = volinfo.leb_size;
++			mtdinfo.writesize = volinfo.leb_size;
++			libubi_close(libubi);
++		}
++#endif
+ 	} else {
+ 		memset(&mtdinfo, 0, sizeof(mtdinfo));
+ 		mtdinfo.type = MTD_ABSENT;
+-- 
+1.9.2
+