kernel/2.6.29.6-aldebaran-rt/sound/soc/s3c24xx/s3c2412-i2s.h

   1 /* sound/soc/s3c24xx/s3c2412-i2s.c
   2  *
   3  * ALSA Soc Audio Layer - S3C2412 I2S driver
   4  *
   5  * Copyright (c) 2007 Simtec Electronics
   6  *      http://armlinux.simtec.co.uk/
   7  *      Ben Dooks <ben@simtec.co.uk>
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13 */
  14
  15 #ifndef __SND_SOC_S3C24XX_S3C2412_I2S_H
  16 #define __SND_SOC_S3C24XX_S3C2412_I2S_H __FILE__
  17
  18 #define S3C2412_DIV_BCLK        (1)
  19 #define S3C2412_DIV_RCLK        (2)
  20 #define S3C2412_DIV_PRESCALER   (3)
  21
  22 #define S3C2412_CLKSRC_PCLK     (0)
  23 #define S3C2412_CLKSRC_I2SCLK   (1)
  24
  25 extern struct clk *s3c2412_get_iisclk(void);
  26
  27 extern struct snd_soc_dai s3c2412_i2s_dai;
  28
  29 struct s3c2412_rate_calc {
  30         unsigned int    clk_div;        /* for prescaler */
  31         unsigned int    fs_div;         /* for root frame clock */
  32 };
  33
  34 extern int s3c2412_iis_calc_rate(struct s3c2412_rate_calc *info,
  35                                  unsigned int *fstab,
  36                                  unsigned int rate, struct clk *clk);
  37
  38 #endif /* __SND_SOC_S3C24XX_S3C2412_I2S_H */