intel/skylake: add nhlt support

The use of a NHLT table is required to make audio work
on the skylake SoCs employing the internal DSP. The table
describes the audo endpoints (render vs capture) along with
their supported formats. These formats are not only dependent
on the audio peripheral but also hardware interfaces. As such
each format has an associated blob of DSP settings to make
the peripheral work. Lastly, each of these settings are provided
by Intel and need to be generated for each device's hardware
connection plus mode/format it supports. This patch does not
include the dsp setting blobs.

The current supported connections:
- digital mic array 2 channel
- digital mic array 4 channel
- Maxim 98357 amplifier
- ADI ssm4567
- NAU88L25 headset codec

BUG=chrome-os-partner:44481
BRANCH=None
TEST=Built glados. Speakers, headphones, and mic on camera decently
     worked.
CQ-DEPEND=CL:*239598

Change-Id: If1a9be97573b9b160893944661790cac7df26fca
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 1f5514e27811c500732de97e1cc7edeced2607e7
Original-Change-Id: Ib42e895f00e7605cb30ce24d9b8dd00bf68a7477
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/313998
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/12938
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/src/soc/intel/skylake/include/soc/nhlt.h b/src/soc/intel/skylake/include/soc/nhlt.h
new file mode 100644
index 0000000000..3800bb978d
--- /dev/null
+++ b/src/soc/intel/skylake/include/soc/nhlt.h
@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+
+#ifndef _SOC_NHLT_H_
+#define _SOC_NHLT_H_
+
+#include <nhlt.h>
+
+/*
+ * Skylake NHLT device and hardware link types. These values are to be used
+ * with nhlt_soc_add_endpoint().
+ */
+
+enum {
+	AUDIO_LINK_SSP0,
+	AUDIO_LINK_SSP1,
+	AUDIO_LINK_SSP2, /* Only Bluetooth supported on SSP2. */
+	AUDIO_LINK_DMIC,
+};
+
+enum {
+	AUDIO_DEV_I2S,
+	AUDIO_DEV_DMIC,
+	AUDIO_DEV_BT,
+};
+
+/*
+ * Add a dmic array composed of the provided number of channels. The skylake
+ * SoC currently only supports dmic arrays on the dmic signals. Either 2
+ * or 4 channel arrays are supported. Returns 0 on success, < 0 on error.
+ */
+int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels);
+
+/*
+ * Add nau88l25 headset codec on provided SSP link. Return 0 on succes, < 0
+ * on error.
+ */
+int nhlt_soc_add_nau88l25(struct nhlt *nhlt, int hwlink);
+
+/*
+ * Add ssm4567 smart amplifiers in stereo configuration on provided SSP link.
+ * Return 0 on success, < 0 on error.
+ */
+int nhlt_soc_add_ssm4567(struct nhlt *nhlt, int hwlink);
+
+/*
+ * Add max98357a amplifier in stereo configuration on provide SSP link.
+ * Return 0 on success, < 0 on error.
+ */
+int nhlt_soc_add_max98357(struct nhlt *nhlt, int hwlink);
+
+#endif