mainboard: Add ASUS Maximus IV GENE-Z

Tested with GRUB 2.02 as a payload, booting Debian GNU/Linux 9.3 with
kernel 4.9. This code is based on the output of autoport.

Working:
 - S3 suspend/resume
 - USB
 - Gigabit Ethernet
 - integrated graphics
 - PCIe
 - SATA
 - eSATA
 - PS/2 port (only a mouse has been tested)
 - hardware monitor
 - onboard audio
 - front panel audio
 - native raminit (2 x 4GB + 2 x 8GB, DDR3-1333)
 - native graphics init with libgfxinit
 - EHCI debug. The debug port is the port closest to the HDMI port.
 - flashrom, using the internal programmer. Tested with coreboot,
   untested with the vendor firmware.
 - NVRAM settings. Only `gfx_uma_size` and `debug_level` have been
   tested with values different from the default.

Untested:
 - VGA BIOS for graphics init
 - PCIe graphics
 - S/PDIF audio

Not working:
 - "clear CMOS" button

The CPUTIN sensor on the Super I/O is not connected. The PECI agent is
likely connected instead to give CPU temperature readings. However,
there does not appear to be enough information in the publicly available
datasheets to fully set up the PECI agent. As a result, there is
currently no accurate, automatic fan control via the Super I/O.

Change-Id: I1fc7940bb139623a5a0fde984c023deca9b551f2
Signed-off-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-on: https://review.coreboot.org/24971
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 114 insertions, 0 deletions

diff --git a/src/mainboard/asus/maximus_iv_gene-z/cmos.layout b/src/mainboard/asus/maximus_iv_gene-z/cmos.layout
new file mode 100644
index 0000000000..9fe6fc2b92
--- /dev/null
+++ b/src/mainboard/asus/maximus_iv_gene-z/cmos.layout
@@ -0,0 +1,114 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2007-2008 coresystems GmbH
+## Copyright (C) 2014 Vladimir Serbinenko
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+# -----------------------------------------------------------------
+entries
+
+# -----------------------------------------------------------------
+# Status Register A
+# -----------------------------------------------------------------
+# Status Register B
+# -----------------------------------------------------------------
+# Status Register C
+#96           4       r       0        status_c_rsvd
+#100          1       r       0        uf_flag
+#101          1       r       0        af_flag
+#102          1       r       0        pf_flag
+#103          1       r       0        irqf_flag
+# -----------------------------------------------------------------
+# Status Register D
+#104          7       r       0        status_d_rsvd
+#111          1       r       0        valid_cmos_ram
+# -----------------------------------------------------------------
+# Diagnostic Status Register
+#112          8       r       0        diag_rsvd1
+
+# -----------------------------------------------------------------
+0            120     r       0        reserved_memory
+#120          264     r       0        unused
+
+# -----------------------------------------------------------------
+# RTC_BOOT_BYTE (coreboot hardcoded)
+384          1       e       3        boot_option
+388          4       h       0        reboot_counter
+
+# -----------------------------------------------------------------
+# coreboot config options: console
+#392          3       r       0        unused
+395          4       e       4        debug_level
+#399          1       r       0        unused
+
+#400         8       r       0        reserved for century byte
+
+# coreboot config options: southbridge
+408          1       e       1        nmi
+409          2       e       5        power_on_after_fail
+411          1       e       6        sata_mode
+
+# coreboot config options: northbridge
+412          3       e       7        gfx_uma_size
+
+# SandyBridge MRC Scrambler Seed values
+896          32      r       0        mrc_scrambler_seed
+928          32      r       0        mrc_scrambler_seed_s3
+960          16      r       0        mrc_scrambler_seed_chk
+
+# coreboot config options: check sums
+984          16      h       0        check_sum
+
+# -----------------------------------------------------------------
+
+enumerations
+
+#ID value   text
+1     0     Disable
+1     1     Enable
+
+2     0     Enable
+2     1     Disable
+
+3     0     Fallback
+3     1     Normal
+
+4     0     Emergency
+4     1     Alert
+4     2     Critical
+4     3     Error
+4     4     Warning
+4     5     Notice
+4     6     Info
+4     7     Debug
+4     8     Spew
+
+5     0     Disable
+5     1     Enable
+5     2     Keep
+
+6     0     AHCI
+6     1     Compatible
+
+7     0     32M
+7     1     64M
+7     2     96M
+7     3     128M
+7     4     160M
+7     5     192M
+7     6     224M
+
+# -----------------------------------------------------------------
+checksums
+
+checksum 392 415 984