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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;
- };
- #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 */
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