sound/soc/samsung/s3c-i2s-v2.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * ALSA Soc Audio Layer - S3C_I2SV2 I2S driver
   4  *
   5  * Copyright (c) 2007 Simtec Electronics
   6  *      http://armlinux.simtec.co.uk/
   7  *      Ben Dooks <ben@simtec.co.uk>
   8  */
   9
  10 /* This code is the core support for the I2S block found in a number of
  11  * Samsung SoC devices which is unofficially named I2S-V2. Currently the
  12  * S3C2412 and the S3C64XX series use this block to provide 1 or 2 I2S
  13  * channels via configurable GPIO.
  14  */
  15
  16 #ifndef __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H
  17 #define __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H __FILE__
  18
  19 #define S3C_I2SV2_DIV_BCLK      (1)
  20 #define S3C_I2SV2_DIV_RCLK      (2)
  21 #define S3C_I2SV2_DIV_PRESCALER (3)
  22
  23 #define S3C_I2SV2_CLKSRC_PCLK           0
  24 #define S3C_I2SV2_CLKSRC_AUDIOBUS       1
  25 #define S3C_I2SV2_CLKSRC_CDCLK          2
  26
  27 /* Set this flag for I2S controllers that have the bit IISMOD[12]
  28  * bridge/break RCLK signal and external Xi2sCDCLK pin.
  29  */
  30 #define S3C_FEATURE_CDCLKCON    (1 << 0)
  31
  32 /**
  33  * struct s3c_i2sv2_info - S3C I2S-V2 information
  34  * @dev: The parent device passed to use from the probe.
  35  * @regs: The pointer to the device registe block.
  36  * @feature: Set of bit-flags indicating features of the controller.
  37  * @master: True if the I2S core is the I2S bit clock master.
  38  * @dma_playback: DMA information for playback channel.
  39  * @dma_capture: DMA information for capture channel.
  40  * @suspend_iismod: PM save for the IISMOD register.
  41  * @suspend_iiscon: PM save for the IISCON register.
  42  * @suspend_iispsr: PM save for the IISPSR register.
  43  *
  44  * This is the private codec state for the hardware associated with an
  45  * I2S channel such as the register mappings and clock sources.
  46  */
  47 struct s3c_i2sv2_info {
  48         struct device   *dev;
  49         void __iomem    *regs;
  50
  51         u32             feature;
  52
  53         struct clk      *iis_pclk;
  54         struct clk      *iis_cclk;
  55
  56         unsigned char    master;
  57
  58         struct snd_dmaengine_dai_dma_data *dma_playback;
  59         struct snd_dmaengine_dai_dma_data *dma_capture;
  60
  61         u32              suspend_iismod;
  62         u32              suspend_iiscon;
  63         u32              suspend_iispsr;
  64
  65         unsigned long   base;
  66 };
  67
  68 extern struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai);
  69
  70 struct s3c_i2sv2_rate_calc {
  71         unsigned int    clk_div;        /* for prescaler */
  72         unsigned int    fs_div;         /* for root frame clock */
  73 };
  74
  75 extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info,
  76                                    unsigned int *fstab,
  77                                    unsigned int rate, struct clk *clk);
  78
  79 /**
  80  * s3c_i2sv2_probe - probe for i2s device helper
  81  * @dai: The ASoC DAI structure supplied to the original probe.
  82  * @i2s: Our local i2s structure to fill in.
  83  * @base: The base address for the registers.
  84  */
  85 extern int s3c_i2sv2_probe(struct snd_soc_dai *dai,
  86                            struct s3c_i2sv2_info *i2s,
  87                            unsigned long base);
  88
  89 /**
  90  * s3c_i2sv2_cleanup - cleanup resources allocated in s3c_i2sv2_probe
  91  * @dai: The ASoC DAI structure supplied to the original probe.
  92  * @i2s: Our local i2s structure to fill in.
  93  */
  94 extern void s3c_i2sv2_cleanup(struct snd_soc_dai *dai,
  95                               struct s3c_i2sv2_info *i2s);
  96 /**
  97  * s3c_i2sv2_register_component - register component and dai with soc core
  98  * @dev: DAI device
  99  * @id: DAI ID
 100  * @drv: The driver structure to register
 101  *
 102  * Fill in any missing fields and then register the given dai with the
 103  * soc core.
 104  */
 105 extern int s3c_i2sv2_register_component(struct device *dev, int id,
 106                                         const struct snd_soc_component_driver *cmp_drv,
 107                                         struct snd_soc_dai_driver *dai_drv);
 108
 109 #endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */