ASoC: sprd: Add Spreadtrum multi-channel data transfer support (d7bff893) · Commits · 戴 / test

sound/soc/sprd/Kconfig

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		@@ -5,3 +5,11 @@ config SND_SOC_SPRD
		help
		Say Y or M if you want to add support for codecs attached to
		the Spreadtrum SoCs' Audio interfaces.

		config SND_SOC_SPRD_MCDT
		bool "Spreadtrum multi-channel data transfer support"
		depends on SND_SOC_SPRD
		help
		Say y here to enable multi-channel data transfer support. It
		is used for sound stream transmission between audio subsystem
		and other AP/CP subsystem.

sound/soc/sprd/Makefile

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		@@ -4,3 +4,5 @@
		snd-soc-sprd-platform-objs := sprd-pcm-dma.o sprd-pcm-compress.o

		obj-$(CONFIG_SND_SOC_SPRD) += snd-soc-sprd-platform.o

		obj-$(CONFIG_SND_SOC_SPRD_MCDT) += sprd-mcdt.o

sound/soc/sprd/sprd-mcdt.c

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File added.

Preview size limit exceeded, changes collapsed.

sound/soc/sprd/sprd-mcdt.h

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		// 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;
		};

		#ifdef 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 */

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