1 files changed, 102 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/nhlt/nhlt.c b/src/soc/intel/skylake/nhlt/nhlt.c
new file mode 100644
index 0000000000..56e7d39254
--- /dev/null
+++ b/src/soc/intel/skylake/nhlt/nhlt.c
@@ -0,0 +1,102 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 Google, 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 <cbmem.h>
+#include <soc/acpi.h>
+#include <soc/nhlt.h>
+
+#define NHLT_VID 0x8086
+#define NHLT_DID_DMIC 0xae20
+#define NHLT_DID_BT 0xae30
+#define NHLT_DID_SSP 0xae34
+
+struct nhlt_endpoint *nhlt_soc_add_endpoint(struct nhlt *nhlt, int soc_hwintf,
+						int soc_devtype, int dir)
+{
+	int nhlt_link_type;
+	int nhlt_dev_type;
+	uint16_t did;
+	struct nhlt_endpoint *endp;
+
+	/* Check link type and device type. */
+	switch (soc_hwintf) {
+	case AUDIO_LINK_SSP0:
+	case AUDIO_LINK_SSP1:
+		/* Only I2S devices on SSP0 and SSP1. */
+		if (soc_devtype != AUDIO_DEV_I2S)
+			return NULL;
+		nhlt_link_type = NHLT_LINK_SSP;
+		break;
+	case AUDIO_LINK_SSP2:
+		/* Only Bluetooth devices on SSP2. */
+		if (soc_devtype != AUDIO_DEV_BT)
+			return NULL;
+		nhlt_link_type = NHLT_LINK_SSP;
+		break;
+	case AUDIO_LINK_DMIC:
+		/* Only DMIC devices on DMIC links. */
+		if (soc_devtype != AUDIO_DEV_DMIC)
+			return NULL;
+		nhlt_link_type = NHLT_LINK_PDM;
+		break;
+	default:
+		return NULL;
+	}
+
+	switch (soc_devtype) {
+	case AUDIO_DEV_I2S:
+		nhlt_dev_type = NHLT_SSP_DEV_I2S;
+		did = NHLT_DID_SSP;
+		break;
+	case AUDIO_DEV_DMIC:
+		nhlt_dev_type = NHLT_PDM_DEV;
+		did = NHLT_DID_DMIC;
+		break;
+	case AUDIO_DEV_BT:
+		nhlt_dev_type = NHLT_SSP_DEV_BT;
+		did = NHLT_DID_BT;
+		break;
+	default:
+		return NULL;
+	}
+
+	endp = nhlt_add_endpoint(nhlt, nhlt_link_type, nhlt_dev_type, dir,
+				NHLT_VID, did);
+
+	if (endp == NULL)
+		return NULL;
+
+	/* Virtual bus id of SSP links are the hardware port ids proper. */
+	if (nhlt_link_type == NHLT_LINK_SSP)
+		endp->virtual_bus_id = soc_hwintf;
+
+	return endp;
+}
+
+uintptr_t nhlt_soc_serialize(struct nhlt *nhlt, uintptr_t acpi_addr)
+{
+	global_nvs_t *gnvs;
+
+	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
+
+	if (gnvs == NULL)
+		return acpi_addr;
+
+	/* Update NHLT GNVS Data */
+	gnvs->nhla = (uintptr_t)acpi_addr;
+	gnvs->nhll = nhlt_current_size(nhlt);
+
+	return nhlt_serialize(nhlt, acpi_addr);
+}