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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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