1 files changed, 99 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/nhlt/dmic.c b/src/soc/intel/skylake/nhlt/dmic.c
new file mode 100644
index 0000000000..0aadbb20df
--- /dev/null
+++ b/src/soc/intel/skylake/nhlt/dmic.c
@@ -0,0 +1,99 @@
+/*
+ * 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 <soc/nhlt.h>
+#include <string.h>
+
+static const struct nhlt_format_config dmic_2ch_cfg[] = {
+	/* 48 KHz 16-bits per sample. */
+	{
+		.num_channels = 2,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 16,
+		.valid_bits_per_sample = 16,
+		.speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT,
+		.settings_file = "dmic-2ch-48khz-16b.bin",
+	},
+	/* 48 KHz 32-bits per sample. */
+	{
+		.num_channels = 2,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 32,
+		.valid_bits_per_sample = 32,
+		.speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT,
+		.settings_file = "dmic-2ch-48khz-32b.bin",
+	},
+};
+
+static const struct nhlt_format_config dmic_4ch_cfg[] = {
+	/* 48 KHz 16-bits per sample. */
+	{
+		.num_channels = 4,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 16,
+		.valid_bits_per_sample = 16,
+		.speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT |
+				SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT,
+		.settings_file = "dmic-4ch-48khz-16b.bin",
+	},
+	/* 48 KHz 32-bits per sample. */
+	{
+		.num_channels = 4,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 32,
+		.valid_bits_per_sample = 32,
+		.speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT |
+				SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT,
+		.settings_file = "dmic-4ch-48khz-32b.bin",
+	},
+};
+
+int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels)
+{
+	struct nhlt_endpoint *endp;
+	struct nhlt_dmic_array_config mic_config;
+	const struct nhlt_format_config *formats;
+	size_t num_formats;
+
+	if (num_channels != 2 && num_channels != 4)
+		return -1;
+
+	endp = nhlt_soc_add_endpoint(nhlt, AUDIO_LINK_DMIC, AUDIO_DEV_DMIC,
+					NHLT_DIR_CAPTURE);
+
+	if (endp == NULL)
+		return -1;
+
+	memset(&mic_config, 0, sizeof(mic_config));
+	mic_config.tdm_config.config_type = NHLT_TDM_MIC_ARRAY;
+
+	switch (num_channels) {
+	case 2:
+		formats = dmic_2ch_cfg;
+		num_formats = ARRAY_SIZE(dmic_2ch_cfg);
+		mic_config.array_type = NHLT_MIC_ARRAY_2CH_SMALL;
+		break;
+	case 4:
+		formats = dmic_4ch_cfg;
+		num_formats = ARRAY_SIZE(dmic_4ch_cfg);
+		mic_config.array_type = NHLT_MIC_ARRAY_4CH_L_SHAPED;
+		break;
+	}
+
+	if (nhlt_endpoint_append_config(endp, &mic_config, sizeof(mic_config)))
+		return -1;
+
+	return nhlt_endpoint_add_formats(endp, formats, num_formats);
+}