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Vadim Bendebury 71558f5627 i2c: add support for ww_ring
This is a copy of the depthcharge ww ring driver implementation ported
into coreboot. The main differences are:

 - direct use of the i2c driver instead of using the callback driver
   description

 - no dynamic memory allocation for the controller structures

BRANCH=storm
BUG=chrome-os-partner:36059
TEST=with the rest of the patches applied the LED ring gets
     initialized to the default pattern at coreboot start.

Change-Id: I6902c8b76fc173ad2ec28b8cc94695e892df338a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: eda24b78f8aff311dd6296d458bdfecf26c3d65a
Original-Change-Id: I5660dc3f255aab8fbe3a87041c72916a645c193b
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/257730
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9858
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-04-22 19:52:51 +02:00
3rdparty@892a6976ba 3rdparty: move checkout marker forward 2015-04-14 01:09:51 +02:00
documentation documentation: define downstream data consumption rules 2015-04-07 00:20:13 +02:00
payloads arm64: Add arch_program_segment_loaded call to arm64 2015-04-22 08:56:36 +02:00
src i2c: add support for ww_ring 2015-04-22 19:52:51 +02:00
util abuild: add option to build with CHROMEOS enabled 2015-04-22 19:37:01 +02:00
.gitignore .gitignore: add the doxygen directory. 2014-12-14 23:30:45 +01:00
.gitmodules nvidia/cbootimage: avoid upstream's build system 2014-10-02 10:26:58 +02:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COPYING
Makefile Makefile: Disable implicit rules 2015-04-22 08:41:54 +02:00
Makefile.inc broadcom/cygnus: add secimage and sign bootblock 2015-04-22 08:59:18 +02:00
README Update README with newer version of the text from the web page 2011-06-15 10:16:33 +02:00
toolchain.inc ARM: Remove -mno-unaligned-access 2015-04-17 09:21:16 +02:00

README

-------------------------------------------------------------------------------
coreboot README
-------------------------------------------------------------------------------

coreboot is a Free Software project aimed at replacing the proprietary BIOS
(firmware) found in most computers.  coreboot performs a little bit of
hardware initialization and then executes additional boot logic, called a
payload.

With the separation of hardware initialization and later boot logic,
coreboot can scale from specialized applications that run directly
firmware, run operating systems in flash, load custom
bootloaders, or implement firmware standards, like PC BIOS services or
UEFI. This allows for systems to only include the features necessary
in the target application, reducing the amount of code and flash space
required.

coreboot was formerly known as LinuxBIOS.


Payloads
--------

After the basic initialization of the hardware has been performed, any
desired "payload" can be started by coreboot.

See http://www.coreboot.org/Payloads for a list of supported payloads.


Supported Hardware
------------------

coreboot supports a wide range of chipsets, devices, and mainboards.

For details please consult:

 * http://www.coreboot.org/Supported_Motherboards
 * http://www.coreboot.org/Supported_Chipsets_and_Devices


Build Requirements
------------------

 * gcc / g++
 * make

Optional:

 * doxygen (for generating/viewing documentation)
 * iasl (for targets with ACPI support)
 * gdb (for better debugging facilities on some targets)
 * ncurses (for 'make menuconfig')
 * flex and bison (for regenerating parsers)


Building coreboot
-----------------

Please consult http://www.coreboot.org/Build_HOWTO for details.


Testing coreboot Without Modifying Your Hardware
------------------------------------------------

If you want to test coreboot without any risks before you really decide
to use it on your hardware, you can use the QEMU system emulator to run
coreboot virtually in QEMU.

Please see http://www.coreboot.org/QEMU for details.


Website and Mailing List
------------------------

Further details on the project, a FAQ, many HOWTOs, news, development
guidelines and more can be found on the coreboot website:

  http://www.coreboot.org

You can contact us directly on the coreboot mailing list:

  http://www.coreboot.org/Mailinglist


Copyright and License
---------------------

The copyright on coreboot is owned by quite a large number of individual
developers and companies. Please check the individual source files for details.

coreboot is licensed under the terms of the GNU General Public License (GPL).
Some files are licensed under the "GPL (version 2, or any later version)",
and some files are licensed under the "GPL, version 2". For some parts, which
were derived from other projects, other (GPL-compatible) licenses may apply.
Please check the individual source files for details.

This makes the resulting coreboot images licensed under the GPL, version 2.