s3c-i2s-v2.h
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/* sound/soc/samsung/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)
#define S3C_I2SV2_CLKSRC_PCLK 0
#define S3C_I2SV2_CLKSRC_AUDIOBUS 1
#define S3C_I2SV2_CLKSRC_CDCLK 2
/* Set this flag for I2S controllers that have the bit IISMOD[12]
* bridge/break RCLK signal and external Xi2sCDCLK pin.
*/
#define S3C_FEATURE_CDCLKCON (1 << 0)
/**
* 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.
* @feature: Set of bit-flags indicating features of the controller.
* @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;
u32 feature;
struct clk *iis_pclk;
struct clk *iis_cclk;
unsigned char master;
struct s3c_dma_params *dma_playback;
struct s3c_dma_params *dma_capture;
u32 suspend_iismod;
u32 suspend_iiscon;
u32 suspend_iispsr;
unsigned long base;
};
extern struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai);
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
* @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 snd_soc_dai *dai,
struct s3c_i2sv2_info *i2s,
unsigned long base);
/**
* s3c_i2sv2_register_dai - register dai with soc core
* @dev: DAI device
* @id: DAI ID
* @drv: The driver 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 device *dev, int id,
struct snd_soc_dai_driver *drv);
#endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */