mb/google/zork: Add Picasso based Zork mainboard and variants

This is a copy of the mb/google/zork directory from the chromiumos
coreboot-zork branch. This was from commit 29308ac8606.

See https://chromium.googlesource.com/chromiumos/third_party/coreboot/+/29308ac8606/src/mainboard/google/zork

Changes:
* Minor changes to make the board build.
* Add bootblock.c.
* Modify romstage.c
* Removed the FSP_X configs from zork/Kconfig since they should be
  set in picasso/Kconfig. picasso/Kconfig doesn't currently define the
  binaries since they haven't been published. To get a working build
  a custom config that sets FSP_X_FILE is required.

BUG=b:157140753
TEST=Build trembyle and boot to OS

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I3933fa54e3f603985a0818852a1c77d8e248484f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41581
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/src/mainboard/google/zork/verstage.c b/src/mainboard/google/zork/verstage.c
new file mode 100644
index 0000000000..7bfc10782a
--- /dev/null
+++ b/src/mainboard/google/zork/verstage.c
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <amdblocks/gpio_banks.h>
+#include <baseboard/variants.h>
+#include <console/console.h>
+#include <security/vboot/vboot_common.h>
+#include <soc/southbridge.h>
+
+static void setup_gpio(void)
+{
+	const struct soc_amd_gpio *gpios;
+	size_t num_gpios;
+
+	printk(BIOS_DEBUG, "Setting GPIOs\n");
+	gpios = variant_romstage_gpio_table(&num_gpios);
+	program_gpios(gpios, num_gpios);
+	printk(BIOS_DEBUG, "GPIOs setup\n");
+}
+
+static void setup_i2c(void)
+{
+	printk(BIOS_DEBUG, "Setting up i2c\n");
+	i2c_soc_early_init();
+	printk(BIOS_DEBUG, "i2c setup\n");
+}
+
+void verstage_mainboard_early_init(void)
+{
+	setup_gpio();
+}
+
+void verstage_mainboard_init(void)
+{
+	setup_i2c();
+}