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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/sound/soc/samsung/s3c-i2s-v2.h
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/* sound/soc/samsung/s3c-i2s-v2.h

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 *

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 * ALSA Soc Audio Layer - S3C_I2SV2 I2S driver

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 *

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 * Copyright (c) 2007 Simtec Electronics

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 *	http://armlinux.simtec.co.uk/

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 *	Ben Dooks <[email protected]>

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 *

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 *  This program is free software; you can redistribute  it and/or modify it

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 *  under  the terms of  the GNU General  Public License as published by the

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 *  Free Software Foundation;  either version 2 of the  License, or (at your

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 *  option) any later version.

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*/

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/* This code is the core support for the I2S block found in a number of

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 * Samsung SoC devices which is unofficially named I2S-V2. Currently the

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 * S3C2412 and the S3C64XX series use this block to provide 1 or 2 I2S

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 * channels via configurable GPIO.

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 */

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#ifndef __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H

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#define __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H __FILE__

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#define S3C_I2SV2_DIV_BCLK	(1)

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#define S3C_I2SV2_DIV_RCLK	(2)

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#define S3C_I2SV2_DIV_PRESCALER	(3)

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#define S3C_I2SV2_CLKSRC_PCLK		0

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#define S3C_I2SV2_CLKSRC_AUDIOBUS	1

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#define S3C_I2SV2_CLKSRC_CDCLK		2

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/* Set this flag for I2S controllers that have the bit IISMOD[12]

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 * bridge/break RCLK signal and external Xi2sCDCLK pin.

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 */

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#define S3C_FEATURE_CDCLKCON	(1 << 0)

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/**

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 * struct s3c_i2sv2_info - S3C I2S-V2 information

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 * @dev: The parent device passed to use from the probe.

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 * @regs: The pointer to the device registe block.

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 * @feature: Set of bit-flags indicating features of the controller.

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 * @master: True if the I2S core is the I2S bit clock master.

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 * @dma_playback: DMA information for playback channel.

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 * @dma_capture: DMA information for capture channel.

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 * @suspend_iismod: PM save for the IISMOD register.

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 * @suspend_iiscon: PM save for the IISCON register.

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 * @suspend_iispsr: PM save for the IISPSR register.

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 *

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 * This is the private codec state for the hardware associated with an

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 * I2S channel such as the register mappings and clock sources.

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 */

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struct s3c_i2sv2_info {

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	struct device	*dev;

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	void __iomem	*regs;

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	u32		feature;

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	struct clk	*iis_pclk;

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	struct clk	*iis_cclk;

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	unsigned char	 master;

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	struct s3c_dma_params	*dma_playback;

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	struct s3c_dma_params	*dma_capture;

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	u32		 suspend_iismod;

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	u32		 suspend_iiscon;

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	u32		 suspend_iispsr;

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	unsigned long	base;

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};

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extern struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai);

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struct s3c_i2sv2_rate_calc {

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	unsigned int	clk_div;	/* for prescaler */

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	unsigned int	fs_div;		/* for root frame clock */

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};

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extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info,

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				   unsigned int *fstab,

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				   unsigned int rate, struct clk *clk);

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/**

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 * s3c_i2sv2_probe - probe for i2s device helper

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 * @dai: The ASoC DAI structure supplied to the original probe.

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 * @i2s: Our local i2s structure to fill in.

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 * @base: The base address for the registers.

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 */

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extern int s3c_i2sv2_probe(struct snd_soc_dai *dai,

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			   struct s3c_i2sv2_info *i2s,

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			   unsigned long base);

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/**

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 * s3c_i2sv2_register_dai - register dai with soc core

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 * @dev: DAI device

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 * @id: DAI ID

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 * @drv: The driver structure to register

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 *

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 * Fill in any missing fields and then register the given dai with the

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 * soc core.

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 */

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extern int s3c_i2sv2_register_dai(struct device *dev, int id,

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		struct snd_soc_dai_driver *drv);

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#endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */

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