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, 79 insertions, 0 deletions

diff --git a/src/mainboard/asus/maximus_iv_gene-z/romstage.c b/src/mainboard/asus/maximus_iv_gene-z/romstage.c
new file mode 100644
index 0000000000..75f99727b1
--- /dev/null
+++ b/src/mainboard/asus/maximus_iv_gene-z/romstage.c
@@ -0,0 +1,79 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017–2018 Tristan Corrick <tristan@corrick.kiwi>
+ *
+ * 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <arch/io.h>
+#include <device/dram/ddr3.h>
+#include <northbridge/intel/sandybridge/raminit_native.h>
+#include <northbridge/intel/sandybridge/sandybridge.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+#include <superio/nuvoton/common/nuvoton.h>
+#include <superio/nuvoton/nct6776/nct6776.h>
+
+const struct southbridge_usb_port mainboard_usb_ports[] = {
+	{ 1, 0, 0 },
+	{ 1, 0, 0 },
+	{ 1, 0, 1 },
+	{ 1, 0, 1 },
+	{ 1, 0, 2 },
+	{ 1, 0, 2 },
+	{ 1, 0, 3 },
+	{ 1, 0, 3 },
+	{ 1, 0, 4 },
+	{ 1, 0, 4 },
+	{ 1, 0, 5 },
+	{ 1, 0, 5 },
+	{ 1, 0, 6 },
+	{ 1, 0, 6 },
+};
+
+void pch_enable_lpc(void)
+{
+	pci_or_config16(PCH_LPC_DEV, LPC_EN, CNF1_LPC_EN | KBC_LPC_EN);
+}
+
+void mainboard_rcba_config(void)
+{
+}
+
+void mainboard_early_init(int s3resume)
+{
+}
+
+void mainboard_config_superio(void)
+{
+	static const pnp_devfn_t GLOBAL_PSEUDO_DEV = PNP_DEV(0x2e, 0);
+	static const pnp_devfn_t ACPI_DEV = PNP_DEV(0x2e, NCT6776_ACPI);
+
+	nuvoton_pnp_enter_conf_state(GLOBAL_PSEUDO_DEV);
+
+	/* Select HWM/LED functions instead of floppy functions. */
+	pnp_write_config(GLOBAL_PSEUDO_DEV, 0x1c, 0x03);
+	pnp_write_config(GLOBAL_PSEUDO_DEV, 0x24, 0x24);
+
+	/* Power RAM in S3. */
+	pnp_set_logical_device(ACPI_DEV);
+	pnp_write_config(ACPI_DEV, 0xe4, 0x10);
+
+	nuvoton_pnp_exit_conf_state(GLOBAL_PSEUDO_DEV);
+}
+
+void mainboard_get_spd(spd_raw_data *spd, bool id_only)
+{
+	read_spd(&spd[0], 0x50, id_only);
+	read_spd(&spd[1], 0x51, id_only);
+	read_spd(&spd[2], 0x52, id_only);
+	read_spd(&spd[3], 0x53, id_only);
+}