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, 48 insertions, 0 deletions

diff --git a/src/mainboard/google/zork/variants/morphius/gpio.c b/src/mainboard/google/zork/variants/morphius/gpio.c
new file mode 100644
index 000000000000..ff8fa202fc6b
--- /dev/null
+++ b/src/mainboard/google/zork/variants/morphius/gpio.c
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <boardid.h>
+#include <gpio.h>
+#include <soc/gpio.h>
+#include <ec/google/chromeec/ec.h>
+
+static const struct soc_amd_gpio morphius_v1_gpio_set_stage_ram[] = {
+	/* USB_OC4_L - USB_A1 */
+	PAD_NF(GPIO_14, USB_OC4_L, PULL_UP),
+	/* USB_OC2_L - USB A0 */
+	PAD_NF(GPIO_18, USB_OC2_L, PULL_UP),
+	/* DMIC_AD_EN */
+	PAD_GPO(GPIO_84, HIGH),
+};
+
+static const struct soc_amd_gpio morphius_v2_gpio_set_stage_ram[] = {
+	/* USB_OC4_L - USB_A1 */
+	PAD_NF(GPIO_14, USB_OC4_L, PULL_UP),
+	/* USB_OC2_L - USB A0 */
+	PAD_NF(GPIO_18, USB_OC2_L, PULL_UP),
+};
+
+const struct soc_amd_gpio *variant_override_gpio_table(size_t *size)
+{
+	uint32_t board_version;
+
+	/*
+	 * If board version cannot be read, assume that this is an older revision of the board
+	 * and so apply overrides. If board version is provided by the EC, then apply overrides
+	 * if version < 2.
+	 */
+	if (google_chromeec_cbi_get_board_version(&board_version))
+		board_version = 1;
+
+	if (board_version <= 1) {
+		*size = ARRAY_SIZE(morphius_v1_gpio_set_stage_ram);
+		return morphius_v1_gpio_set_stage_ram;
+	} else if (board_version <= 2) {
+		*size = ARRAY_SIZE(morphius_v2_gpio_set_stage_ram);
+		return morphius_v2_gpio_set_stage_ram;
+	}
+
+	*size = 0;
+	return NULL;
+}