1 files changed, 56 insertions, 0 deletions
diff --git a/sound/soc/sprd/dai/sprd-dmaengine-pcm.h b/sound/soc/sprd/dai/sprd-dmaengine-pcm.h
new file mode 100644
index 00000000..09bf8c3a
--- /dev/null
+++ b/sound/soc/sprd/dai/sprd-dmaengine-pcm.h
@@ -0,0 +1,56 @@
+/*
+ * sound/soc/sprd/dai/sprd-dmaengine-pcm.h
+ *
+ * SpreadTrum DMA for the pcm stream.
+ *
+ * Copyright (C) 2012 SpreadTrum Ltd.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 __SPRD_DMA_ENGINE_PCM_H
+#define __SPRD_DMA_ENGINE_PCM_H
+
+//#include <mach/dma.h>
+//#include <sprd_dma.h>
+#include <../../../drivers/dma/sprd_dma.h>
+#include <linux/dmaengine.h>
+
+
+#define VBC_PCM_FORMATS			SNDRV_PCM_FMTBIT_S16_LE
+#define VBC_FIFO_FRAME_NUM	  	(160)
+#define VBC_BUFFER_BYTES_MAX 		(128 * 1024)
+
+#define I2S_BUFFER_BYTES_MAX 		(64 * 1024)
+
+#define AUDIO_BUFFER_BYTES_MAX 		(VBC_BUFFER_BYTES_MAX + I2S_BUFFER_BYTES_MAX)
+
+struct sprd_pcm_dma_params {
+	char *name;		/* stream identifier */
+	int channels[2];	/* channel id */
+	int irq_type;		/* dma interrupt type */
+	struct sprd_dma_cfg desc;	/* dma description struct */
+	u32 dev_paddr[2];	/* device physical address for DMA */
+};
+
+static inline u32 sprd_pcm_dma_get_addr(struct dma_chan *dma_chn,
+					dma_cookie_t cookie, struct snd_pcm_substream *substream)
+{
+	struct dma_tx_state dma_state;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		dma_state.residue = SPRD_SRC_ADDR;
+	} else {
+		dma_state.residue = SPRD_DST_ADDR;
+	}
+	dmaengine_tx_status(dma_chn, cookie, &dma_state);
+	//printk(KERN_ERR "%s, residue:0x%x \n",__func__,dma_state.residue);
+	return dma_state.residue;
+}
+
+#endif /* __SPRD_DMA_ENGINE_PCM_H */