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, 201 insertions, 0 deletions

diff --git a/src/mainboard/google/zork/variants/dalboz/variant.c b/src/mainboard/google/zork/variants/dalboz/variant.c
new file mode 100644
index 0000000000..aae8f03058
--- /dev/null
+++ b/src/mainboard/google/zork/variants/dalboz/variant.c
@@ -0,0 +1,201 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/variants.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <drivers/i2c/generic/chip.h>
+#include <soc/pci_devs.h>
+#include <ec/google/chromeec/ec.h>
+#include <ec/google/chromeec/i2c_tunnel/chip.h>
+#include <string.h>
+
+#define EC_PNP_ID 0x0c09
+
+/* Look for an EC device of type PNP with id 0x0c09 */
+static bool match_ec_dev(DEVTREE_CONST struct device *dev)
+{
+	if (dev->path.type != DEVICE_PATH_PNP)
+		return false;
+
+	if (dev->path.pnp.port != EC_PNP_ID)
+		return false;
+
+	return true;
+}
+
+extern struct chip_operations drivers_i2c_generic_ops;
+
+/* Look for an I2C device with HID "10EC5682" */
+static bool match_audio_dev(DEVTREE_CONST struct device *dev)
+{
+	struct drivers_i2c_generic_config *cfg;
+
+	if (dev->chip_ops != &drivers_i2c_generic_ops)
+		return false;
+
+	cfg = dev->chip_info;
+
+	return !strcmp(cfg->hid, "10EC5682");
+}
+
+extern struct chip_operations ec_google_chromeec_i2c_tunnel_ops;
+
+/* Look for Cros EC tunnel device which has audio device under it. */
+static bool match_audio_tunnel(DEVTREE_CONST struct device *dev)
+{
+	const struct device *audio_dev;
+
+	if (dev->chip_ops != &ec_google_chromeec_i2c_tunnel_ops)
+		return false;
+
+	audio_dev = dev_find_matching_device_on_bus(dev->link_list, match_audio_dev);
+
+	if (!audio_dev)
+		return false;
+
+	return true;
+}
+
+/*
+ * This is to allow support for audio on older board versions (< 2). [b/153458561]. This
+ * should be removed once these boards are phased out.
+ */
+static void update_audio_configuration(void)
+{
+	uint32_t board_version;
+	const struct device *lpc_controller;
+	const struct device *ec_dev;
+	const struct device *i2c_tunnel_dev;
+	struct ec_google_chromeec_i2c_tunnel_config *cfg;
+
+	/* If CBI board version cannot be read, assume this is an older revision of hardware. */
+	if (google_chromeec_cbi_get_board_version(&board_version) != 0)
+		board_version = 1;
+
+	if (board_version >= 2)
+		return;
+
+	lpc_controller = SOC_LPC_DEV;
+	if (lpc_controller == NULL) {
+		printk(BIOS_ERR, "%s: LPC controller device not found!\n", __func__);
+		return;
+	}
+
+	ec_dev = dev_find_matching_device_on_bus(lpc_controller->link_list, match_ec_dev);
+
+	if (ec_dev == NULL) {
+		printk(BIOS_ERR, "%s: EC device not found!\n", __func__);
+		return;
+	}
+
+	i2c_tunnel_dev = dev_find_matching_device_on_bus(ec_dev->link_list, match_audio_tunnel);
+
+	if (i2c_tunnel_dev == NULL) {
+		printk(BIOS_ERR, "%s: I2C tunnel device not found!\n", __func__);
+		return;
+	}
+
+	cfg = i2c_tunnel_dev->chip_info;
+	if (cfg == NULL) {
+		printk(BIOS_ERR, "%s: I2C tunnel device config not found!\n", __func__);
+		return;
+	}
+
+	cfg->remote_bus = 5;
+}
+
+static int sku_has_emmc(void)
+{
+	uint32_t board_sku = sku_id();
+
+	/* Factory flow requires all OS boot media to be enabled. */
+	if (boot_is_factory_unprovisioned())
+		return 1;
+
+	/* FIXME: This needs to be fw_config controlled. */
+	/* Enable emmc0 for unknown skus. Only sku3/0xC really has it. */
+	if (board_sku == 0x5A80000C || board_sku == 0x5A800003 || board_sku == CROS_SKU_UNKNOWN)
+		return 1;
+
+	return 0;
+}
+
+void variant_devtree_update(void)
+{
+	struct soc_amd_picasso_config *cfg;
+
+	cfg = config_of_soc();
+
+	if (sku_has_emmc()) {
+		if (sku_id() == 0x5A800003)
+			/* rev0 boards have issues with HS400 */
+			cfg->sd_emmc_config = SD_EMMC_EMMC_HS200;
+	} else {
+		cfg->sd_emmc_config = SD_EMMC_DISABLE;
+	}
+
+	update_audio_configuration();
+}
+
+/* FIXME: Comments seem to suggest these are not entirely correct. */
+static const picasso_fsp_ddi_descriptor non_hdmi_ddi_descriptors[] = {
+	{
+		// DDI0, DP0, eDP
+		.connector_type = EDP,
+		.aux_index = AUX1,
+		.hdp_index = HDP1
+	},
+	{
+		// DDI1, DP1, DB OPT2 USB-C1 / DB OPT3 MST hub
+		.connector_type = DP,
+		.aux_index = AUX2,
+		.hdp_index = HDP2
+	},
+	{
+		// DP2 pins not connected on Dali
+		// DDI2, DP3, USB-C0
+		.connector_type = DP,
+		.aux_index = AUX4,
+		.hdp_index = HDP4,
+	}
+};
+
+static const picasso_fsp_ddi_descriptor hdmi_ddi_descriptors[] = {
+	{ // DDI0, DP0, eDP
+		.connector_type = EDP,
+		.aux_index = AUX1,
+		.hdp_index = HDP1
+	},
+	{ // DDI1, DP1, DB OPT2 USB-C1 / DB OPT3 MST hub
+		.connector_type = HDMI,
+		.aux_index = AUX2,
+		.hdp_index = HDP2
+	},
+	// DP2 pins not connected on Dali
+	{ // DDI2, DP3, USB-C0
+		.connector_type = DP,
+		.aux_index = AUX4,
+		.hdp_index = HDP4,
+	}
+};
+
+void variant_get_pcie_ddi_descriptors(const picasso_fsp_pcie_descriptor **pcie_descs,
+				      size_t *pcie_num,
+				      const picasso_fsp_ddi_descriptor **ddi_descs,
+				      size_t *ddi_num)
+{
+	uint32_t board_sku = sku_id();
+
+	*pcie_descs = baseboard_get_pcie_descriptors(pcie_num);
+
+	/* SKU 1, A, and D DB have HDMI, as well as unknown */
+	/* FIXME: this needs to be fw_config controlled. */
+	if ((board_sku == 0x5A80000A) || (board_sku == 0x5A80000D) || (board_sku == 0x5A800001)
+	    || (board_sku == CROS_SKU_UNKNOWN)) {
+		*ddi_descs = &hdmi_ddi_descriptors[0];
+		*ddi_num = ARRAY_SIZE(hdmi_ddi_descriptors);
+	} else {
+		*ddi_descs = &non_hdmi_ddi_descriptors[0];
+		*ddi_num = ARRAY_SIZE(non_hdmi_ddi_descriptors);
+	}
+}