doc: board: Add Intel Bay Trail based board docs

This extracts Intel Bay Trail based board specific information from
README.x86, converts plain text documentation to reST format and
adds them to Sphinx TOC tree. No essential content change.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>

3 files changed, 101 insertions, 0 deletions

diff --git a/doc/board/intel/bayleybay.rst b/doc/board/intel/bayleybay.rst
new file mode 100644
index 0000000000..db97f645fd
--- /dev/null
+++ b/doc/board/intel/bayleybay.rst
@@ -0,0 +1,29 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. sectionauthor:: Bin Meng <bmeng.cn@gmail.com>
+
+Bayley Bay CRB
+==============
+
+This uses as FSP as with Crown Bay, except it is for the Atom E3800 series.
+Download this and get the .fd file (BAYTRAIL_FSP_GOLD_003_16-SEP-2014.fd at
+the time of writing). Put it in the corresponding board directory and rename
+it to fsp.bin.
+
+Obtain the VGA RAM (Vga.dat at the time of writing) and put it into the same
+board directory as vga.bin.
+
+You still need two more binary blobs. For Bayley Bay, they can be extracted
+from the sample SPI image provided in the FSP (SPI.bin at the time of writing)::
+
+   $ ./tools/ifdtool -x BayleyBay/SPI.bin
+   $ cp flashregion_0_flashdescriptor.bin board/intel/bayleybay/descriptor.bin
+   $ cp flashregion_2_intel_me.bin board/intel/bayleybay/me.bin
+
+Now you can build U-Boot and obtain u-boot.rom::
+
+   $ make bayleybay_defconfig
+   $ make all
+
+Note that the debug version of the FSP is bigger in size. If this version
+is used, CONFIG_FSP_ADDR needs to be configured to 0xfffb0000 instead of
+the default value 0xfffc0000.
diff --git a/doc/board/intel/index.rst b/doc/board/intel/index.rst
index 93b8ba26aa..af24760b78 100644
--- a/doc/board/intel/index.rst
+++ b/doc/board/intel/index.rst
@@ -6,4 +6,6 @@ Intel
 .. toctree::
    :maxdepth: 2
 
+   bayleybay
    crownbay
+   minnowmax
diff --git a/doc/board/intel/minnowmax.rst b/doc/board/intel/minnowmax.rst
new file mode 100644
index 0000000000..028121735a
--- /dev/null
+++ b/doc/board/intel/minnowmax.rst
@@ -0,0 +1,70 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. sectionauthor:: Simon Glass <sjg@chromium.org>
+
+Minnowboard MAX
+===============
+
+This uses as FSP as with Crown Bay, except it is for the Atom E3800 series.
+Download this and get the .fd file (BAYTRAIL_FSP_GOLD_003_16-SEP-2014.fd at
+the time of writing). Put it in the corresponding board directory and rename
+it to fsp.bin.
+
+Obtain the VGA RAM (Vga.dat at the time of writing) and put it into the same
+board directory as vga.bin.
+
+You still need two more binary blobs. For Minnowboard MAX, we can reuse the
+same ME firmware above, but for flash descriptor, we need get that somewhere
+else, as the one above does not seem to work, probably because it is not
+designed for the Minnowboard MAX. Now download the original firmware image
+for this board from:
+
+   * http://firmware.intel.com/sites/default/files/2014-WW42.4-MinnowBoardMax.73-64-bit.bin_Release.zip
+
+Unzip it::
+
+   $ unzip 2014-WW42.4-MinnowBoardMax.73-64-bit.bin_Release.zip
+
+Use ifdtool in the U-Boot tools directory to extract the images from that
+file, for example::
+
+   $ ./tools/ifdtool -x MNW2MAX1.X64.0073.R02.1409160934.bin
+
+This will provide the descriptor file - copy this into the correct place::
+
+   $ cp flashregion_0_flashdescriptor.bin board/intel/minnowmax/descriptor.bin
+
+Now you can build U-Boot and obtain u-boot.rom::
+
+   $ make minnowmax_defconfig
+   $ make all
+
+Checksums are as follows (but note that newer versions will invalidate this)::
+
+   $ md5sum -b board/intel/minnowmax/*.bin
+   ffda9a3b94df5b74323afb328d51e6b4  board/intel/minnowmax/descriptor.bin
+   69f65b9a580246291d20d08cbef9d7c5  board/intel/minnowmax/fsp.bin
+   894a97d371544ec21de9c3e8e1716c4b  board/intel/minnowmax/me.bin
+   a2588537da387da592a27219d56e9962  board/intel/minnowmax/vga.bin
+
+The ROM image is broken up into these parts:
+
+======   ==================  ============================
+Offset   Description         Controlling config
+======   ==================  ============================
+000000   descriptor.bin      Hard-coded to 0 in ifdtool
+001000   me.bin              Set by the descriptor
+500000   <spare>
+6ef000   Environment         CONFIG_ENV_OFFSET
+6f0000   MRC cache           CONFIG_ENABLE_MRC_CACHE
+700000   u-boot-dtb.bin      CONFIG_SYS_TEXT_BASE
+7b0000   vga.bin             CONFIG_VGA_BIOS_ADDR
+7c0000   fsp.bin             CONFIG_FSP_ADDR
+7f8000   <spare>             (depends on size of fsp.bin)
+7ff800   U-Boot 16-bit boot  CONFIG_SYS_X86_START16
+======   ==================  ============================
+
+Overall ROM image size is controlled by CONFIG_ROM_SIZE.
+
+Note that the debug version of the FSP is bigger in size. If this version
+is used, CONFIG_FSP_ADDR needs to be configured to 0xfffb0000 instead of
+the default value 0xfffc0000.