Normally, multiple public keys can be provided and U-Boot is not
required to use all of them for verification. This is because some
images may not be signed, or may be optionally signed.

But we still need a mechanism to determine when a key must be used.
This feature cannot be implemented in the FIT itself, since anyone
could change it to mark a key as optional. The requirement for
key verification must go in with the public keys, in a place that
is protected from modification.

Add a -r option which tells mkimage to mark all keys that it uses
for signing as 'required'.

If some keys are optional and some are required, run mkimage several
times (perhaps with different key directories if some keys are very
secret) using the -F flag to update an existing FIT.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NMarek Vasut <marex@denx.de>

When signing an image, it is useful to add some details about which tool
or person is authorising the signing. Add a comment field which can take
care of miscellaneous requirements.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NMarek Vasut <marex@denx.de>

When signing images it is sometimes necessary to sign with different keys
at different times, or make the signer entirely separate from the FIT
creation to avoid needing the private keys to be publicly available in
the system.

Add a -F option so that key signing can be a separate step, and possibly
done multiple times as different keys are avaiable.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NMarek Vasut <marex@denx.de>

FIT image verification requires public keys. Add a convenient option to
mkimage to write the public keys to an FDT blob when it uses then for
signing an image. This allows us to use:

   mkimage -f test.its -K dest.dtb -k keys test.fit

and have the signatures written to test.fit and the corresponding public
keys written to dest.dtb. Then dest.dtb can be used as the control FDT
for U-Boot (CONFIG_OF_CONTROL), thus providing U-Boot with access to the
public keys it needs.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NMarek Vasut <marex@denx.de>

Keys required for signing images will be in a specific directory. Add a
-k option to specify that directory.

Also update the mkimage man page with this information and a clearer list
of available commands.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de> (v1)

RSA provides a public key encryption facility which is ideal for image
signing and verification.

Images are signed using a private key by mkimage. Then at run-time, the
images are verified using a private key.

This implementation uses openssl for the host part (mkimage). To avoid
bringing large libraries into the U-Boot binary, the RSA public key
is encoded using a simple numeric representation in the device tree.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add support for signing images using a new signature node. The process
is handled by fdt_add_verification_data() which now takes parameters to
provide the keys and related information.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add a structure to describe an algorithm which can sign and (later) verify
images.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add configs to enable tracing when it is needed.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Some changes are needed to x86 timer functions to support tracing. Add
these so that the feature works correctly.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add tracing to Exynos5 boards, so that tracing can be enabled when building
with 'make FTRACE=1'. We use a 16MB trace buffer.
Signed-off-by: NSimon Glass <sjg@chromium.org>

For tracing to work it has to be able to access the microsecond timer
without causing a recursive call to the function entry/exit handlers.
Add attributes to the relevant functions to support this.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>

Implement this feature on ARM for tracing.

It would be nice to have generic bootm support so that it is easily
implemented on any arch.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Acked-by: NAlbert ARIBAUD <albert.u.boot@aribaud.net>

For tracing it is useful to run as much of U-Boot as possible so as to get
a complete picture. Quite a bit of work happens in bootm, and we don't want
to have to stop tracing before bootm starts.

Add a way of doing a 'fake' boot of the OS - which does everything up to
the point where U-Boot is about to jump to the OS image. This allows
tracing to record right until the end.

This requires arch support to work.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present the bootm code is mostly duplicated for the plain 'bootm'
command and its sub-command variant. This makes the code harder to
maintain and means that changes must be made to several places.

Introduce do_bootm_states() which performs selected portions of the bootm
work, so that both plain 'bootm' and 'bootm <sub_command>' can use the
same code.

Additional duplication exists in bootz, so tidy that up as well. This
is not intended to change behaviour, apart from minor fixes where the
previously-duplicated code missed some chunks of code.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present the arguments to bootm are processed in a somewhat confusing
way. Sub-functions must know how many arguments their calling functions
have processed, and the OS boot function must also have this information.
Also it isn't obvious that 'bootm' and 'bootm start' provide arguments in
the same way.

Adjust the code so that arguments are removed from the list before calling
a sub-function. This means that all functions can know that argv[0] is the
first argument of which they need to take notice.
Signed-off-by: NSimon Glass <sjg@chromium.org>

It is difficult to automatically test tracing on most architectures, but
with sandbox it is easy enough to do a simple sanity check.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Support tracing on sandbox by adding suitable CONFIG options. To enable it,
compile U-Boot with FTRACE=1.

The timer functions are marked to skip tracing, since these are called from
the tracing code itself, and we want to avoid an infinite loop.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This tool provides the facility to decode U-Boot trace data and write out
a text file in Linux ftrace format for use with pytimechart.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add hooks for tracing to generic board, including:

- allow early tracing to start early as possible in U-Boot
- reserve memory for trace buffer
- copy early trace buffer to main trace buffer after relocation
- setup full tracing support after relocation
Signed-off-by: NSimon Glass <sjg@chromium.org>

Use -finstrument-functions when tracing is enabled (make FTRACE=1).
Tracing is not currently supported by SPL even if sufficient memory is
available.

When tracing is enabled, we #define FTRACE. This can be used by
board config files to conditionally enable the tracing options.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add a trace command with sub-commands to start/stop tracing, print out
statistics and dump trace information to memory for later upload to a host.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add a library which supports tracing of execution using built-in gcc
features and a microsecond timer. This can be used to record a list of
function which are executed, along with a timestamp for each. Later
this information can be sent to the host for processing.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Move bootstage's numbering printing code into a generic place so that it can
be used by tracing also.
Signed-off-by: NSimon Glass <sjg@chromium.org>

The unstash code is a bit loose with its printf() types, which gives
warnings on sandbox. Correct this.
Signed-off-by: NSimon Glass <sjg@chromium.org>

When this test fails it is useful to see the output from U-Boot. Add
printing of this information on failure.
Signed-off-by: NSimon Glass <sjg@chromium.org>

For some reason this does not normally cause a compiler warning, but the code
seems to be incorrect. Add the missing return.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Enabling FIT produces a compile error. Fix this.
Signed-off-by: NSimon Glass <sjg@chromium.org>

I am not sure of the meaning of extern inline, but this gives errors
when building with function instrumenting enabled. Change these functions
to static inline.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This patch initiates cros-ec in board_init() to enable it for smdk5250.

This patch depends on the patch in the MMC series that brings in exynos5-dt.c.
Refer to http://patchwork.ozlabs.org/patch/240084.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NVincent Palatin <vpalatin@chromium.org>
Signed-off-by: NHung-ying Tyan <tyanh@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>

This patch adds cros-ec related device nodes to exynos5250-snow.dts.
It also adds a gpio node to exynos5250.dtsi.
Signed-off-by: NHung-ying Tyan <tyanh@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>

This patch adds the driver for keyboard that's controlled by ChromeOS EC.
Signed-off-by: NRandall Spangler <rspangler@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NVincent Palatin <vpalatin@chromium.org>
Signed-off-by: NHung-ying Tyan <tyanh@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>

This patch adds LPC support for carrying out the cros_ec protocol.
Signed-off-by: NRandall Spangler <rspangler@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NHung-ying Tyan <tyanh@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>

This patch adds SPI support for carrying out the cros_ec protocol.
Signed-off-by: NHung-ying Tyan <tyanh@chromium.org>
Signed-off-by: NRandall Spangler <rspangler@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>

This patch adds I2C support for carrying out the cros_ec protocol.
Signed-off-by: NRandall Spangler <rspangler@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NHung-ying Tyan <tyanh@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>

This patch adds the cros_ec driver that implements the protocol for
communicating with Google's ChromeOS embedded controller.
Signed-off-by: NBernie Thompson <bhthompson@chromium.org>
Signed-off-by: NBill Richardson <wfrichar@chromium.org>
Signed-off-by: NChe-Liang Chiou <clchiou@chromium.org>
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NGabe Black <gabeblack@chromium.org>
Signed-off-by: NHung-ying Tyan <tyanh@chromium.org>
Signed-off-by: NLouis Yung-Chieh Lo <yjlou@chromium.org>
Signed-off-by: NRandall Spangler <rspangler@chromium.org>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NVincent Palatin <vpalatin@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>

add atheros ar803x phy, used on the upcoming siemens boards.
Signed-off-by: NHeiko Schocher <hs@denx.de>
Cc: Andy Fleming <afleming@freescale.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>

add natsemi dp83630 phy, used on the upcoming siemens boards.
Signed-off-by: NHeiko Schocher <hs@denx.de>
Cc: Andy Fleming <afleming@freescale.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>

Signed-off-by: NKuo-Jung Su <dantesu@faraday-tech.com>
CC: Joe Hershberger <joe.hershberger@gmail.com>
CC: Tom Rini <trini@ti.com>