LXR linux/include/sound/designware

   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 */
  18struct i2s_clk_config_data {
  19        int chan_nr;
  20        u32 data_width;
  21        u32 sample_rate;
  22};
  23
  24struct 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
  47struct 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 */
  65