1 files changed, 72 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/acp.c b/src/soc/amd/picasso/acp.c
new file mode 100644
index 0000000000..ad5333a266
--- /dev/null
+++ b/src/soc/amd/picasso/acp.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include "chip.h"
+#include <soc/acpi.h>
+#include <soc/pci_devs.h>
+#include <soc/northbridge.h>
+#include <soc/southbridge.h>
+#include <amdblocks/acpimmio.h>
+#include <commonlib/helpers.h>
+
+static void enable(struct device *dev)
+{
+	const struct soc_amd_picasso_config *cfg;
+	const struct device *nb_dev = pcidev_path_on_root(GNB_DEVFN);
+	struct resource *res;
+	uintptr_t bar;
+
+	pci_dev_enable_resources(dev);
+
+	/* Set the proper I2S_PIN_CONFIG state */
+	if (!nb_dev || !nb_dev->chip_info)
+		return;
+
+	cfg = nb_dev->chip_info;
+
+	res = dev->resource_list;
+	if (!res || !res->base) {
+		printk(BIOS_ERR, "Error, unable to configure pin in %s\n", __func__);
+		return;
+	}
+
+	bar = (uintptr_t)res->base;
+	write32((void *)(bar + ACP_I2S_PIN_CONFIG), cfg->acp_pin_cfg);
+
+	if (cfg->acp_pin_cfg == I2S_PINS_I2S_TDM)
+		sb_clk_output_48Mhz(); /* Internal connection to I2S */
+}
+
+static struct pci_operations lops_pci = {
+	.set_subsystem = pci_dev_set_subsystem,
+};
+
+static struct device_operations acp_ops = {
+	.read_resources = pci_dev_read_resources,
+	.set_resources = pci_dev_set_resources,
+	.enable_resources = enable,
+	.ops_pci = &lops_pci,
+};
+
+static const struct pci_driver acp_driver __pci_driver = {
+	.ops = &acp_ops,
+	.vendor = PCI_VENDOR_ID_AMD,
+	.device = PCI_DEVICD_ID_AMD_PCO_ACP,
+};