devfs: factor out core devfs functionality ...

This makes it possible to compile without devfs. devfs_create/devfs_remove
is used by drivers and thus must still be present even without devfs support.
Also, this patch adds cdev_open/cdev_close/cdev_flush/cdev_ioctl calls to
work with devices without using the file api.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: implement flush function ...

Once we have caching in file functions we need a way to sync
the the underlying devices.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: remove unused struct filep* argument from open/close ...

the cdev layer is under the file layer, so it should not use
struct filep*.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: remove unused field 'type' from struct fs_driver_d ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: only check for ioctl function when needed ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

add partition mtd support ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

rename U-Boot-v2 project to barebox ...

This has been done with the following script:

find -path ./.git -prune -o -type f -print0 | xargs -0 -r sed -i \
	-e 's/u2boot/barebox/g' \
	-e 's/U2Boot/barebox/g' \
	-e 's/U-boot V2/barebox/g' \
	-e 's/u-boot v2/barebox/g' \
	-e 's/U-Boot V2/barebox/g' \
	-e 's/U-Boot-v2/barebox/g' \
	-e 's/U_BOOT/BAREBOX/g' \
	-e 's/UBOOT/BAREBOX/g' \
	-e 's/uboot/barebox/g' \
	-e 's/u-boot/barebox/g' \
	-e 's/u_boot/barebox/g' \
	-e 's/U-Boot/barebox/g' \
	-e 's/U-boot/barebox/g' \
	-e 's/U-BOOT/barebox/g'

find -path ./.git -prune -o \( -name "*u-boot*" -o -name "*uboot*" -o -name "*u_boot*" \) -print0 | \
	xargs -0 -r rename 's/u[-_]?boot/barebox/'

It needs some manual fixup following in the next patch

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: fix return value for lseek in partitions ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: add open counter ...

Add an open counter for device files so that we cannot accidently
remove an opened device. This happened with bb devices.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

get rid of device ids ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

make sure ramfs/devfs are initialised when needed ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Get rid of DEVICE_TYPE_FS usage ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: add missing remove function ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

introduce cdev ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

lseek: return -1 for errors and check for that return value ...

We cannot check for < 0 in lseek, otherwise we get problems with files > 0x7fffffff

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

- introduce ioctl call ...

- pass open/close/lseek through to drivers

Use Linux kernel list for drivers and devices instead of handmade ...

list.

declare lots of functions static

implement flash protection

implement memmap(). ...

With this function we can get a pointer to directly memory mapped
devices like nor flash or RAM. Useful for bootm where we save one
memcopy when the image is mappable

implement truncate for devfs

svn_rev_706 ...

add file headers

svn_rev_448 ...

add erase

svn_rev_437 ...

use dev_read/dev_write

svn_rev_420 ...

- do more POSIX:
  - use DIR instead of struct dirent
  - use (struct dirent)->d_name instead of (struct dirent)->name
- switch to a new layout for U_BOOT_CMD:
  - use C99 initializers to be able to add more fields to the
    command struct
  - add aliases for commands (needed mainly for help -> ? and test -> [
  - This is not done for all commands yet, but the compiler will tell you ;)

svn_rev_369 ...

include asm-generic in errno.h instead of all other files

svn_rev_337

svn_rev_284 ...

add devfs