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authorSimon Glass <sjg@chromium.org>2019-02-16 20:24:55 -0700
committerBin Meng <bmeng.cn@gmail.com>2019-02-20 15:27:09 +0800
commit2ca471379b471dc0d31459974d7cc4b54c824956 (patch)
tree983fe8748d877c73a8cbbfb277d6c6078ebea30e /include/dt-bindings/sound/azalia.h
parent2850266965ade165f913a66f679a0449faf21180 (diff)
sound: Add support for Intel HDA
The Intel High-definition Audio is a newer-generation audio system which provides for transfer of a large number of audio stream, each containing up to 16 channels. Add support for HDA as a library which can be used by other drivers. U-Boot currently uses only two channels (stereo). Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include/dt-bindings/sound/azalia.h')
-rw-r--r--include/dt-bindings/sound/azalia.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/include/dt-bindings/sound/azalia.h b/include/dt-bindings/sound/azalia.h
new file mode 100644
index 0000000000..10ace3ef56
--- /dev/null
+++ b/include/dt-bindings/sound/azalia.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Intel HDA audio codec config. This is a mechanicm to configure codecs when
+ * using Intel HDA audio.
+ *
+ * Copyright 2018 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#ifndef __AZALIA_H
+#define __AZALIA_H
+
+#define AZALIA_CODEC_SHIFT 28
+#define AZALIA_NID_SHIFT 20
+#define AZALIA_VERB_SHIFT 8
+
+/* Supported opcodes */
+#define AZALIA_OPCODE_CONFIG_DEFAULT 0x71c
+#define AZALIA_OPCODE_IMPL_ID 0x720
+#define AZALIA_OPCODE_READ_PARAM 0xf00
+
+#define AZALIA_PARAM_VENDOR_ID 0
+
+/* Generate the register value to write a particular byte of a 32-bit value */
+#define AZALIA_SET_BYTE(codec, nid, opcode, val, byte) \
+ ((codec) << AZALIA_CODEC_SHIFT | \
+ (nid) << AZALIA_NID_SHIFT | \
+ ((opcode) + (byte)) << AZALIA_VERB_SHIFT | \
+ (((val) >> ((byte) * 8)) & 0xff))
+
+/* Generate the register value to write all bytes of a 32-bit value */
+#define AZALIA_WORD(codec, nid, opcode, val) \
+ (AZALIA_SET_BYTE(codec, nid, opcode, val, 0) | \
+ AZALIA_SET_BYTE(codec, nid, opcode, val, 1) | \
+ AZALIA_SET_BYTE(codec, nid, opcode, val, 2) | \
+ AZALIA_SET_BYTE(codec, nid, opcode, val, 3))
+
+#define AZALIA_PIN_CFG(codec, nid, val) \
+ AZALIA_WORD(codec, nid, AZALIA_OPCODE_CONFIG_DEFAULT, val)
+
+#define AZALIA_SUBVENDOR(codec, val) \
+ AZALIA_WORD(codec, 1, AZALIA_OPCODE_IMPL_ID, val)
+
+#endif /* __AZALIA_H */