f_fastboot: remove only image from bootm variables ...

Remove only the bootm.image variable which will be set by fastboot.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: gadget: fastboot: print fastboot messages also to the logs ...

It's nice to also see on the barebox side what is going on with
fastboot, so print the messages to the logs also.

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

usb: gadget: fastboot: simplify reboot ...

Now that we end the fastboot session when shutting down barebox
we can call restart_machine() directly and not in the completion
callback of the answer request.

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

usb: gadget: fastboot: be more informative on booting ...

We used to end the fastboot session once we received the boot command.
Now that we end the session during shutdown we can do better: We can
end the session once we actually shutdown, or more importantly in the
case of an error.

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

usb: gadget: fastboot: tell host that we are going to shutdown ...

Some commands like booting a kernel will trigger a shutdown of barebox,
but the host will never notice and timeout later. Be more friendly and
tell the host we are going to shutdown and end the current fastboot
session.

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

usb: gadget: fastboot: remove unnecessary context setting ...

Instead of setting the context for in_req we have set the context
for out_req twice. This didn't trigger an error because we haven't
used the context. So instead of fixing it we can equally well just
remove it.

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

usb: gadget: fastboot: drop unnecessary global variable ...

Polling for the status of a request does not require a global variable.
We can poll for the status directly.

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

usb: gadget: fastboot: pass message type as enum ...

We used to pass the message type ("INFO", "FAIL", "OKAY") as strings
to fastboot_tx_print(). Change this to a enum type. This allows
fastboot_tx_print() to react on the message type in the next step.

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

usb: gadget: fastboot: remove unused variable ...

ep is unused, remove it.

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

Merge branch 'for-next/misc'

bbu: Add "handler" parameter to barebox_update() ...

Add "handler" parameter to barebox_update() and remove the code that
was respondible for header lookup before. With this change finding
appropriate handler is caller's responsibility, which makes it
possible to implement custom handler lookup/existence check, chache
it, and then re-use it without calling handler_find_by_* functions for
the second time.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

bbu: Expose bbu_find_handler_by_*() functions ...

Expose bbu_find_handler_by_device() and bbu_find_handler_by_name() as
public functions and convert the only user of
barebox_update_handler_exists() to use the former function instead.

With this done, barebox_update_handler_exists() is no longer used
anywhere in the code and can be removed.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: gadget: fastboot: fix downloading files of wMaxPacketSize bytes ...

File transfers with sizes of exact multiples of wMaxPacketSize up to
EP_BUFFER_SIZE do not work. For a typical scenario that would be files
of 512, 1024 ... 3584 bytes.

This happens because we unconditionally put EP_BUFFER_SIZE into the
initial request length. For non wMaxPacketSize aligned lengths this
works well because the transfer is completed with a short packet.
For wMaxPacketSize aligned lengths there is no short packet though,
so the transfer never completes. Instead we have to put the file
size into the initial request length.

Some controllers like the DWC3 do not work when the request length is
not aligned to wMaxPacketSize, so we align up to wMaxPacketSize like
done in U-Boot.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported-by: Gavin Schenk <g.schenk@eckelmann.de>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

usb: gadget: fastboot: detect device if not present ...

When a device file is not present when the fastboot gadget is created
then try to detect it before we fail. It may be that we want to write
to a device that we haven't used before.

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

usb: gadget: allow to actually enable sparse fastboot support ...

When sparse support was (intended to be) made optional it was
effectively unconditionally disabled because

	IS_ENABLED(USB_GADGET_FASTBOOT_SPARSE)

always evaluates to 0. To actually make use of the introduced kconfig
symbol the CONFIG_ prefix must not be skipped.

Fixes: f4b5d3eeb607 ("usb: gadget: fastboot: Make sparse support optional")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Gavin Schenk <g.schenk@eckelmann.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: gadget: fastboot: fix barebox update without using buffer ...

Commit e5098495 "usb: gadget: fastboot: Add option to download to a buffer"
breaks the use of temporary files for fastboot barebox_update.

In the patch the ".imagefile = FASTBOOT_TMPFILE" allocation gets
removed, but data.imagefile is still used. This leads to an NULL
pointer dereference. We fix it by using sourcefile instead.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: gadget: fastboot: Add external command execution support ...

Custom projects may need vendor specific expansions to the fastboot
command execution. Allow these to be implemented without messing in
the fastboot code directly.
We have a hook for all commands and also one for the "flash" command.
Each hook can decide if the generic command parser is executed
afterwards (return value FASTBOOT_CMD_FALLTHROUGH) or if the generic
parser shall be skipped (return value 0 or negative error code).

This allows board code to implement vendor specific "oem" commands
or to handle the downloaded image in a special way (i.e. do signature
checks on them)

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

usb: gadget: fastboot: Add option to download to a buffer ...

This adds an option to download the image data to a temporary
buffer rather than to a file. While a file is generally the
better option, in some special cases a buffer is better for
memory usage.

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

usb: gadget: fastboot: beautify fb_run_command() ...

Only some refactoring, no functional change intended.

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

usb: gadget: fastboot: fix typo ...

s/correspoinding/corresponding/

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

usb: gadget: fastboot: Always remove temporary file ...

We should consistently remove the temporary image file, regardless
of the error code. To do so, always jump to the end of the function
where the temporary file is removed.

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

usb: gadget: fastboot: use read_file_2 ...

read_file_2 gives us a proper error code and allows us
to specify a maximum size which in this case we happen to know.

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

usb: gadget: fastboot: pass struct f_fastboot * around ...

The different fastboot commands mostly do not need the USB endpoint
or the USB request, they need the context data structure struct
f_fastboot * instead, so rather pass this one around between the
different functions.

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

usb: gadget: fastboot: Make sparse support optional ...

Sparse support is not always desired, make it optional.

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

usb: gadget: fastboot: allow data.image to be const ...

Do not directly store the dynamically allocated memory in data.image
as we want to make that pointer const and then no longer can call
free() on it.

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

usb: gadget: fastboot: Add sparse image support ...

Sparse images are needed for fastboot to flash images that do not
fit into memory.

Android fastboot is kind of a dumb protocol. It first sends you a
big image and afterwards it tells you where to put this image. This
of course limits fastboot to files smaller than the available memory.
To bypass this issue fastboot has so called Sparse image support. This
is a new image format that can contain holes in the data so a big image
can be written in multiple steps with holes in other areas each step.

Implementing this for UBI images is kind of tricky since ubiformat
normally expects to get a single image. Preparations to ubiformat
a device in multiple parts have been done in previous patches.
It is however, only for the first part possible to detect if it is
a UBI image. The other parts are just binary data and we cannot
know if we have to pass this data raw to the flash or use ubiformat.
For this reason this patch makes the 'u' flag in the partition
description mandatory for proper UBI image flashing on MTD devices.

fastboot passes a max_download_size variable to the host. This
variable contains the image size fastboot can take in one go.
We have to choose a good compromise here. On one hand we do not
want to risk that we actually do not have enough memory to hold the
transferred image, on the other hand we want images like bootloaders
not as sparse images, but in one go instead to make atomic exchange
of the bootloader possible. Right now we have chosen 8MiB which
should be big enough for all bootloaders. The value is configurable
via global.usbgadget.fastboot_max_download_size.

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

usbgadget: fastboot: Allow to automatically export the bbu handlers ...

We have a list of registered handlers which take a barebox update. Do
the next step and allow to automatically export them via fastboot so
that barebox can be updated via fastboot without manually exporting
the partition. Since this may not be desirable in all cases this
behaviour is configurable.

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

usbgadget: fastboot: Use function to find file_list entry by name ...

We have file_list_entry_by_name() now, so use it rather than open
coding it.

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

usb: gadget: fastboot: delete temporary file ...

After we have copied the data to its final destination there is
no need to keep the temporary file around. Remove it when done
with it.

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

fastboot: abort autoboot timeout when fastboot gadget is activated ...

This patch adds a call to "console_countdown_abort()" to abort a currently or
upcoming running console timeout.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>