sound/soc/sprd/sprd-mcdt.h

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #ifndef __SPRD_MCDT_H
   4 #define __SPRD_MCDT_H
   5
   6 enum sprd_mcdt_channel_type {
   7         SPRD_MCDT_DAC_CHAN,
   8         SPRD_MCDT_ADC_CHAN,
   9         SPRD_MCDT_UNKNOWN_CHAN,
  10 };
  11
  12 enum sprd_mcdt_dma_chan {
  13         SPRD_MCDT_DMA_CH0,
  14         SPRD_MCDT_DMA_CH1,
  15         SPRD_MCDT_DMA_CH2,
  16         SPRD_MCDT_DMA_CH3,
  17         SPRD_MCDT_DMA_CH4,
  18 };
  19
  20 struct sprd_mcdt_chan_callback {
  21         void (*notify)(void *data);
  22         void *data;
  23 };
  24
  25 /**
  26  * struct sprd_mcdt_chan - this struct represents a single channel instance
  27  * @mcdt: the mcdt controller
  28  * @id: channel id
  29  * @fifo_phys: channel fifo physical address which is used for DMA transfer
  30  * @type: channel type
  31  * @cb: channel fifo interrupt's callback interface to notify the fifo events
  32  * @dma_enable: indicate if use DMA mode to transfer data
  33  * @int_enable: indicate if use interrupt mode to notify users to read or
  34  * write data manually
  35  * @list: used to link into the global list
  36  *
  37  * Note: users should not modify any members of this structure.
  38  */
  39 struct sprd_mcdt_chan {
  40         struct sprd_mcdt_dev *mcdt;
  41         u8 id;
  42         unsigned long fifo_phys;
  43         enum sprd_mcdt_channel_type type;
  44         enum sprd_mcdt_dma_chan dma_chan;
  45         struct sprd_mcdt_chan_callback *cb;
  46         bool dma_enable;
  47         bool int_enable;
  48         struct list_head list;
  49 };
  50
  51 #ifdef CONFIG_SND_SOC_SPRD_MCDT
  52 struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
  53                                               enum sprd_mcdt_channel_type type);
  54 void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan);
  55
  56 int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size);
  57 int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size);
  58 int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
  59                               struct sprd_mcdt_chan_callback *cb);
  60 void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan);
  61
  62 int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
  63                               enum sprd_mcdt_dma_chan dma_chan, u32 water_mark);
  64 void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan);
  65
  66 #else
  67
  68 struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
  69                                               enum sprd_mcdt_channel_type type)
  70 {
  71         return NULL;
  72 }
  73
  74 void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan)
  75 { }
  76
  77 int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size)
  78 {
  79         return -EINVAL;
  80 }
  81
  82 int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size)
  83 {
  84         return 0;
  85 }
  86
  87 int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
  88                               struct sprd_mcdt_chan_callback *cb)
  89 {
  90         return -EINVAL;
  91 }
  92
  93 void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan)
  94 { }
  95
  96 int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
  97                               enum sprd_mcdt_dma_chan dma_chan, u32 water_mark)
  98 {
  99         return -EINVAL;
 100 }
 101
 102 void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan)
 103 { }
 104
 105 #endif
 106
 107 #endif /* __SPRD_MCDT_H */