cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

s3c-i2s-v2.h (3352B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * ALSA Soc Audio Layer - S3C_I2SV2 I2S driver
      4 *
      5 * Copyright (c) 2007 Simtec Electronics
      6 *	http://armlinux.simtec.co.uk/
      7 *	Ben Dooks <ben@simtec.co.uk>
      8 */
      9
     10/* This code is the core support for the I2S block found in a number of
     11 * Samsung SoC devices which is unofficially named I2S-V2. Currently the
     12 * S3C2412 and the S3C64XX series use this block to provide 1 or 2 I2S
     13 * channels via configurable GPIO.
     14 */
     15
     16#ifndef __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H
     17#define __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H __FILE__
     18
     19#define S3C_I2SV2_DIV_BCLK	(1)
     20#define S3C_I2SV2_DIV_RCLK	(2)
     21#define S3C_I2SV2_DIV_PRESCALER	(3)
     22
     23#define S3C_I2SV2_CLKSRC_PCLK		0
     24#define S3C_I2SV2_CLKSRC_AUDIOBUS	1
     25#define S3C_I2SV2_CLKSRC_CDCLK		2
     26
     27/* Set this flag for I2S controllers that have the bit IISMOD[12]
     28 * bridge/break RCLK signal and external Xi2sCDCLK pin.
     29 */
     30#define S3C_FEATURE_CDCLKCON	(1 << 0)
     31
     32/**
     33 * struct s3c_i2sv2_info - S3C I2S-V2 information
     34 * @dev: The parent device passed to use from the probe.
     35 * @regs: The pointer to the device registe block.
     36 * @feature: Set of bit-flags indicating features of the controller.
     37 * @master: True if the I2S core is the I2S bit clock master.
     38 * @dma_playback: DMA information for playback channel.
     39 * @dma_capture: DMA information for capture channel.
     40 * @suspend_iismod: PM save for the IISMOD register.
     41 * @suspend_iiscon: PM save for the IISCON register.
     42 * @suspend_iispsr: PM save for the IISPSR register.
     43 *
     44 * This is the private codec state for the hardware associated with an
     45 * I2S channel such as the register mappings and clock sources.
     46 */
     47struct s3c_i2sv2_info {
     48	struct device	*dev;
     49	void __iomem	*regs;
     50
     51	u32		feature;
     52
     53	struct clk	*iis_pclk;
     54	struct clk	*iis_cclk;
     55
     56	unsigned char	 master;
     57
     58	struct snd_dmaengine_dai_dma_data *dma_playback;
     59	struct snd_dmaengine_dai_dma_data *dma_capture;
     60
     61	u32		 suspend_iismod;
     62	u32		 suspend_iiscon;
     63	u32		 suspend_iispsr;
     64
     65	unsigned long	base;
     66};
     67
     68extern struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai);
     69
     70struct s3c_i2sv2_rate_calc {
     71	unsigned int	clk_div;	/* for prescaler */
     72	unsigned int	fs_div;		/* for root frame clock */
     73};
     74
     75extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info,
     76				   unsigned int *fstab,
     77				   unsigned int rate, struct clk *clk);
     78
     79/**
     80 * s3c_i2sv2_probe - probe for i2s device helper
     81 * @dai: The ASoC DAI structure supplied to the original probe.
     82 * @i2s: Our local i2s structure to fill in.
     83 * @base: The base address for the registers.
     84 */
     85extern int s3c_i2sv2_probe(struct snd_soc_dai *dai,
     86			   struct s3c_i2sv2_info *i2s);
     87
     88/**
     89 * s3c_i2sv2_cleanup - cleanup resources allocated in s3c_i2sv2_probe
     90 * @dai: The ASoC DAI structure supplied to the original probe.
     91 * @i2s: Our local i2s structure to fill in.
     92 */
     93extern void s3c_i2sv2_cleanup(struct snd_soc_dai *dai,
     94			      struct s3c_i2sv2_info *i2s);
     95/**
     96 * s3c_i2sv2_register_component - register component and dai with soc core
     97 * @dev: DAI device
     98 * @id: DAI ID
     99 * @drv: The driver structure to register
    100 *
    101 * Fill in any missing fields and then register the given dai with the
    102 * soc core.
    103 */
    104extern int s3c_i2sv2_register_component(struct device *dev, int id,
    105					const struct snd_soc_component_driver *cmp_drv,
    106					struct snd_soc_dai_driver *dai_drv);
    107
    108#endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */