108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/* 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 snd_dmaengine_dai_dma_data *dma_playback;
|
|
struct snd_dmaengine_dai_dma_data *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_component - register component and 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_component(struct device *dev, int id,
|
|
const struct snd_soc_component_driver *cmp_drv,
|
|
struct snd_soc_dai_driver *dai_drv);
|
|
|
|
#endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */
|