sound: ASoC: Blackfin: AC97 Blackfin CPU DAI driver

Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 36 insertions, 0 deletions

diff --git a/sound/soc/blackfin/bf5xx-ac97.h b/sound/soc/blackfin/bf5xx-ac97.h
new file mode 100644
index 000000000000..3f77cc558dc0
--- /dev/null
+++ b/sound/soc/blackfin/bf5xx-ac97.h
@@ -0,0 +1,36 @@
+/*
+ * linux/sound/arm/bf5xx-ac97.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _BF5XX_AC97_H
+#define _BF5XX_AC97_H
+
+extern struct snd_ac97_bus_ops bf5xx_ac97_ops;
+extern struct snd_ac97 *ac97;
+/* Frame format in memory, only support stereo currently */
+struct ac97_frame {
+        u16 ac97_tag;           /* slot 0 */
+        u16 ac97_addr;          /* slot 1 */
+        u16 ac97_data;          /* slot 2 */
+        u32 ac97_pcm;           /* slot 3 and 4: left and right pcm data */
+} __attribute__ ((packed));
+
+#define TAG_VALID               0x8000
+#define TAG_CMD                 0x6000
+#define TAG_PCM_LEFT            0x1000
+#define TAG_PCM_RIGHT           0x0800
+#define TAG_PCM                 (TAG_PCM_LEFT | TAG_PCM_RIGHT)
+
+extern struct snd_soc_dai bfin_ac97_dai;
+
+void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u32 *src, \
+                size_t count);
+
+void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u32 *dst, \
+                size_t count);
+
+#endif