soc/intel/apollolake: add initial NHLT support

Provide the initial NHLT support for the following hardware:

1. 2 channel digital microphone array
2. Dialog 7219 headset
3. Maxim 98357 speaker amplifiers.

The code utilizes the Intel SoC common NHLT support.

Change-Id: Ic31e834a08f29c66512a7a63ad7bb35e0374e86a
Signed-off-by: Saurabh Satija <saurabh.satija@intel.com>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15504
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)

src/soc/intel/apollolake/Kconfig

@@ -17,6 +17,9 @@ config CPU_SPECIFIC_OPTIONS
 	select SMP
 	select SSE2
 	select SUPPORT_CPU_UCODE_IN_CBFS
+	# Audio options
+	select ACPI_NHLT
+	select SOC_INTEL_COMMON_NHLT
 	# Misc options
 	select C_ENVIRONMENT_BOOTBLOCK
 	select COLLECT_TIMESTAMPS
@@ -182,4 +185,25 @@ config IFWI_FILE_NAME
 	help
 	  Name of file to store in the IFWI region.
 
+config NHLT_DMIC_2CH_16B
+	bool
+	depends on ACPI_NHLT
+	default n
+	help
+	  Include DSP firmware settings for 2 channel 16B DMIC array.
+
+config NHLT_MAX98357
+	bool
+	depends on ACPI_NHLT
+	default n
+	help
+	  Include DSP firmware settings for headset codec.
+
+config NHLT_DA7219
+	bool
+	depends on ACPI_NHLT
+	default n
+	help
+	  Include DSP firmware settings for headset codec.
+
 endif

src/soc/intel/apollolake/Makefile.inc

@@ -51,6 +51,7 @@ ramstage-y += lpc_lib.c
 ramstage-y += memmap.c
 ramstage-y += mmap_boot.c
 ramstage-y += uart.c
+ramstage-y += nhlt.c
 ramstage-y += northbridge.c
 ramstage-y += spi.c
 ramstage-y += tsc_freq.c
@@ -104,4 +105,22 @@ files_added:: $(IFWITOOL)
 	$(CBFSTOOL) $(obj)/coreboot.rom write -r $(CONFIG_IFWI_FMAP_NAME) -f $(objcbfs)/ifwi.bin.tmp --fill-upward
 endif
 
+# DSP firmware settings files.
+NHLT_BLOB_PATH = 3rdparty/blobs/soc/intel/apollolake/nhlt-blobs
+DMIC_2CH_48KHZ_16B = dmic-2ch-48khz-16b.bin
+MAX98357_RENDER = max98357-render-2ch-48khz-24b.bin
+DA7219_RENDER_CAPTURE = dialog-2ch-48khz-24b.bin
+
+cbfs-files-$(CONFIG_NHLT_DMIC_2CH) += $(DMIC_2CH_48KHZ_16B)
+$(DMIC_2CH_48KHZ_16B)-file := $(NHLT_BLOB_PATH)/$(DMIC_2CH_48KHZ_16B)
+$(DMIC_2CH_48KHZ_16B)-type := raw
+
+cbfs-files-$(CONFIG_NHLT_MAX98357) += $(MAX98357_RENDER)
+$(MAX98357_RENDER)-file := $(NHLT_BLOB_PATH)/$(MAX98357_RENDER)
+$(MAX98357_RENDER)-type := raw
+
+cbfs-files-$(CONFIG_NHLT_DA7219) += $(DA7219_RENDER_CAPTURE)
+$(DA7219_RENDER_CAPTURE)-file := $(NHLT_BLOB_PATH)/$(DA7219_RENDER_CAPTURE)
+$(DA7219_RENDER_CAPTURE)-type := raw
+
 endif

src/soc/intel/apollolake/include/soc/nhlt.h

@@ -0,0 +1,43 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef _SOC_APOLLOLAKE_NHLT_H_
+#define _SOC_APOLLOLAKE_NHLT_H_
+
+#include <nhlt.h>
+
+#define NHLT_VID 0x8086
+#define NHLT_DID_DMIC 0xae20
+#define NHLT_DID_BT 0xae30
+#define NHLT_DID_SSP 0xae34
+
+/* The following link values should be used for the hwlink parameters below. */
+enum {
+	AUDIO_LINK_SSP0,
+	AUDIO_LINK_SSP1,
+	AUDIO_LINK_SSP2,
+	AUDIO_LINK_SSP3,
+	AUDIO_LINK_SSP4,
+	AUDIO_LINK_SSP5,
+	AUDIO_LINK_DMIC,
+};
+
+/* Returns < 0 on error, 0 on success. */
+int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels);
+int nhlt_soc_add_max98357(struct nhlt *nhlt, int hwlink);
+int nhlt_soc_add_da7219(struct nhlt *nhlt, int hwlink);
+
+#endif

src/soc/intel/apollolake/nhlt.c

@@ -0,0 +1,142 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <nhlt.h>
+#include <soc/nhlt.h>
+
+static const struct nhlt_format_config dmic_2ch_formats[] = {
+	/* 48 KHz 16-bits per sample. */
+	{
+		.num_channels = 2,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 16,
+		.valid_bits_per_sample = 16,
+		.settings_file = "dmic-2ch-48khz-16b.bin",
+	},
+};
+
+static const struct nhlt_dmic_array_config dmic_2ch_mic_config = {
+	.tdm_config = {
+		.config_type = NHLT_TDM_MIC_ARRAY,
+	},
+	.array_type = NHLT_MIC_ARRAY_2CH_SMALL,
+};
+
+static const struct nhlt_endp_descriptor dmic_2ch_descriptors[] = {
+	{
+		.link = NHLT_LINK_PDM,
+		.device = NHLT_PDM_DEV,
+		.direction = NHLT_DIR_CAPTURE,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_DMIC,
+		.cfg = &dmic_2ch_mic_config,
+		.cfg_size = sizeof(dmic_2ch_mic_config),
+		.formats = dmic_2ch_formats,
+		.num_formats = ARRAY_SIZE(dmic_2ch_formats),
+	},
+};
+
+static const struct nhlt_format_config da7219_formats[] = {
+	/* 48 KHz 24-bits per sample. */
+	{
+		.num_channels = 2,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 32,
+		.valid_bits_per_sample = 24,
+		.settings_file = "dialog-2ch-48khz-24b.bin",
+	},
+};
+
+static const struct nhlt_tdm_config tdm_config = {
+	.virtual_slot = 0,
+	.config_type = NHLT_TDM_BASIC,
+};
+
+static const struct nhlt_endp_descriptor da7219_descriptors[] = {
+	/* Render Endpoint */
+	{
+		.link = NHLT_LINK_SSP,
+		.device = NHLT_SSP_DEV_I2S,
+		.direction = NHLT_DIR_RENDER,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_SSP,
+		.cfg = &tdm_config,
+		.cfg_size = sizeof(tdm_config),
+		.formats = da7219_formats,
+		.num_formats = ARRAY_SIZE(da7219_formats),
+	},
+	/* Capture Endpoint */
+	{
+		.link = NHLT_LINK_SSP,
+		.device = NHLT_SSP_DEV_I2S,
+		.direction = NHLT_DIR_CAPTURE,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_SSP,
+		.cfg = &tdm_config,
+		.cfg_size = sizeof(tdm_config),
+		.formats = da7219_formats,
+		.num_formats = ARRAY_SIZE(da7219_formats),
+	},
+};
+
+static const struct nhlt_format_config max98357_formats[] = {
+	/* 48 KHz 24-bits per sample. */
+	{
+		.num_channels = 2,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 32,
+		.valid_bits_per_sample = 24,
+		.settings_file = "max98357-render-2ch-48khz-24b.bin",
+	},
+};
+
+static const struct nhlt_endp_descriptor max98357_descriptors[] = {
+	{
+		.link = NHLT_LINK_SSP,
+		.device = NHLT_SSP_DEV_I2S,
+		.direction = NHLT_DIR_RENDER,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_SSP,
+		.formats = max98357_formats,
+		.num_formats = ARRAY_SIZE(max98357_formats),
+	},
+};
+
+int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels)
+{
+	if (num_channels != 2) {
+		printk(BIOS_ERR, "APL only supports 2CH DMIC array.\n");
+		return -1;
+	}
+
+	return nhlt_add_endpoints(nhlt, dmic_2ch_descriptors,
+				ARRAY_SIZE(dmic_2ch_descriptors));
+}
+
+int nhlt_soc_add_da7219(struct nhlt *nhlt, int hwlink)
+{
+	/* Virtual bus id of SSP links are the hardware port ids proper. */
+	return nhlt_add_ssp_endpoints(nhlt, hwlink, da7219_descriptors,
+					ARRAY_SIZE(da7219_descriptors));
+}
+
+int nhlt_soc_add_max98357(struct nhlt *nhlt, int hwlink)
+{
+	/* Virtual bus id of SSP links are the hardware port ids proper. */
+	return nhlt_add_ssp_endpoints(nhlt, hwlink, max98357_descriptors,
+					ARRAY_SIZE(max98357_descriptors));
+}