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s3c-i2s-v2.h

/* sound/soc/s3c24xx/s3c-i2s-v2.h
 *
 * ALSA Soc Audio Layer - S3C_I2SV2 I2S driver
 *
 * Copyright (c) 2007 Simtec Electronics
 *    http://armlinux.simtec.co.uk/
 *    Ben Dooks <ben@simtec.co.uk>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
*/

/* This code is the core support for the I2S block found in a number of
 * Samsung SoC devices which is unofficially named I2S-V2. Currently the
 * S3C2412 and the S3C64XX series use this block to provide 1 or 2 I2S
 * channels via configurable GPIO.
 */

#ifndef __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H
#define __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H __FILE__

#define S3C_I2SV2_DIV_BCLK    (1)
#define S3C_I2SV2_DIV_RCLK    (2)
#define S3C_I2SV2_DIV_PRESCALER     (3)

/**
 * struct s3c_i2sv2_info - S3C I2S-V2 information
 * @dev: The parent device passed to use from the probe.
 * @regs: The pointer to the device registe block.
 * @master: True if the I2S core is the I2S bit clock master.
 * @dma_playback: DMA information for playback channel.
 * @dma_capture: DMA information for capture channel.
 * @suspend_iismod: PM save for the IISMOD register.
 * @suspend_iiscon: PM save for the IISCON register.
 * @suspend_iispsr: PM save for the IISPSR register.
 *
 * This is the private codec state for the hardware associated with an
 * I2S channel such as the register mappings and clock sources.
 */
struct s3c_i2sv2_info {
      struct device     *dev;
      void __iomem      *regs;

      struct clk  *iis_pclk;
      struct clk  *iis_cclk;
      struct clk  *iis_clk;

      unsigned char      master;

      struct s3c_dma_params   *dma_playback;
      struct s3c_dma_params   *dma_capture;

      u32          suspend_iismod;
      u32          suspend_iiscon;
      u32          suspend_iispsr;
};

struct s3c_i2sv2_rate_calc {
      unsigned int      clk_div;    /* for prescaler */
      unsigned int      fs_div;           /* for root frame clock */
};

extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info,
                           unsigned int *fstab,
                           unsigned int rate, struct clk *clk);

/**
 * s3c_i2sv2_probe - probe for i2s device helper
 * @pdev: The platform device supplied to the original probe.
 * @dai: The ASoC DAI structure supplied to the original probe.
 * @i2s: Our local i2s structure to fill in.
 * @base: The base address for the registers.
 */
extern int s3c_i2sv2_probe(struct platform_device *pdev,
                     struct snd_soc_dai *dai,
                     struct s3c_i2sv2_info *i2s,
                     unsigned long base);

/**
 * s3c_i2sv2_register_dai - register dai with soc core
 * @dai: The snd_soc_dai structure to register
 *
 * Fill in any missing fields and then register the given dai with the
 * soc core.
 */
extern int s3c_i2sv2_register_dai(struct snd_soc_dai *dai);

#endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */

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