root/include/sound/designware_i2s.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com)
   4  */
   5 
   6 #ifndef __SOUND_DESIGNWARE_I2S_H
   7 #define __SOUND_DESIGNWARE_I2S_H
   8 
   9 #include <linux/dmaengine.h>
  10 #include <linux/types.h>
  11 
  12 /*
  13  * struct i2s_clk_config_data - represent i2s clk configuration data
  14  * @chan_nr: number of channel
  15  * @data_width: number of bits per sample (8/16/24/32 bit)
  16  * @sample_rate: sampling frequency (8Khz, 16Khz, 32Khz, 44Khz, 48Khz)
  17  */
  18 struct i2s_clk_config_data {
  19         int chan_nr;
  20         u32 data_width;
  21         u32 sample_rate;
  22 };
  23 
  24 struct i2s_platform_data {
  25         #define DWC_I2S_PLAY    (1 << 0)
  26         #define DWC_I2S_RECORD  (1 << 1)
  27         #define DW_I2S_SLAVE    (1 << 2)
  28         #define DW_I2S_MASTER   (1 << 3)
  29         unsigned int cap;
  30         int channel;
  31         u32 snd_fmts;
  32         u32 snd_rates;
  33 
  34         #define DW_I2S_QUIRK_COMP_REG_OFFSET    (1 << 0)
  35         #define DW_I2S_QUIRK_COMP_PARAM1        (1 << 1)
  36         #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2)
  37         unsigned int quirks;
  38         unsigned int i2s_reg_comp1;
  39         unsigned int i2s_reg_comp2;
  40 
  41         void *play_dma_data;
  42         void *capture_dma_data;
  43         bool (*filter)(struct dma_chan *chan, void *slave);
  44         int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
  45 };
  46 
  47 struct i2s_dma_data {
  48         void *data;
  49         dma_addr_t addr;
  50         u32 max_burst;
  51         enum dma_slave_buswidth addr_width;
  52         bool (*filter)(struct dma_chan *chan, void *slave);
  53 };
  54 
  55 /* I2S DMA registers */
  56 #define I2S_RXDMA               0x01C0
  57 #define I2S_TXDMA               0x01C8
  58 
  59 #define TWO_CHANNEL_SUPPORT     2       /* up to 2.0 */
  60 #define FOUR_CHANNEL_SUPPORT    4       /* up to 3.1 */
  61 #define SIX_CHANNEL_SUPPORT     6       /* up to 5.1 */
  62 #define EIGHT_CHANNEL_SUPPORT   8       /* up to 7.1 */
  63 
  64 #endif /*  __SOUND_DESIGNWARE_I2S_H */