1 files changed, 107 insertions, 0 deletions
diff --git a/sound/soc/sprd/sprd-mcdt.h b/sound/soc/sprd/sprd-mcdt.h
new file mode 100644
index 000000000..679e3af3b
--- /dev/null
+++ b/sound/soc/sprd/sprd-mcdt.h
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#ifndef __SPRD_MCDT_H
+#define __SPRD_MCDT_H
+
+enum sprd_mcdt_channel_type {
+	SPRD_MCDT_DAC_CHAN,
+	SPRD_MCDT_ADC_CHAN,
+	SPRD_MCDT_UNKNOWN_CHAN,
+};
+
+enum sprd_mcdt_dma_chan {
+	SPRD_MCDT_DMA_CH0,
+	SPRD_MCDT_DMA_CH1,
+	SPRD_MCDT_DMA_CH2,
+	SPRD_MCDT_DMA_CH3,
+	SPRD_MCDT_DMA_CH4,
+};
+
+struct sprd_mcdt_chan_callback {
+	void (*notify)(void *data);
+	void *data;
+};
+
+/**
+ * struct sprd_mcdt_chan - this struct represents a single channel instance
+ * @mcdt: the mcdt controller
+ * @id: channel id
+ * @fifo_phys: channel fifo physical address which is used for DMA transfer
+ * @type: channel type
+ * @cb: channel fifo interrupt's callback interface to notify the fifo events
+ * @dma_enable: indicate if use DMA mode to transfer data
+ * @int_enable: indicate if use interrupt mode to notify users to read or
+ * write data manually
+ * @list: used to link into the global list
+ *
+ * Note: users should not modify any members of this structure.
+ */
+struct sprd_mcdt_chan {
+	struct sprd_mcdt_dev *mcdt;
+	u8 id;
+	unsigned long fifo_phys;
+	enum sprd_mcdt_channel_type type;
+	enum sprd_mcdt_dma_chan dma_chan;
+	struct sprd_mcdt_chan_callback *cb;
+	bool dma_enable;
+	bool int_enable;
+	struct list_head list;
+};
+
+#if IS_ENABLED(CONFIG_SND_SOC_SPRD_MCDT)
+struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
+					      enum sprd_mcdt_channel_type type);
+void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan);
+
+int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size);
+int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size);
+int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
+			      struct sprd_mcdt_chan_callback *cb);
+void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan);
+
+int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
+			      enum sprd_mcdt_dma_chan dma_chan, u32 water_mark);
+void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan);
+
+#else
+
+struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
+					      enum sprd_mcdt_channel_type type)
+{
+	return NULL;
+}
+
+void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan)
+{ }
+
+int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size)
+{
+	return -EINVAL;
+}
+
+int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size)
+{
+	return 0;
+}
+
+int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
+			      struct sprd_mcdt_chan_callback *cb)
+{
+	return -EINVAL;
+}
+
+void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan)
+{ }
+
+int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
+			      enum sprd_mcdt_dma_chan dma_chan, u32 water_mark)
+{
+	return -EINVAL;
+}
+
+void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan)
+{ }
+
+#endif
+
+#endif /* __SPRD_MCDT_H */