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 */ 109