1 /* sound/soc/samsung/s3c-i2s-v2.h 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 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 */ 14 15 /* This code is the core support for the I2S block found in a number of 16 * Samsung SoC devices which is unofficially named I2S-V2. Currently the 17 * S3C2412 and the S3C64XX series use this block to provide 1 or 2 I2S 18 * channels via configurable GPIO. 19 */ 20 21 #ifndef __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H 22 #define __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H __FILE__ 23 24 #define S3C_I2SV2_DIV_BCLK (1) 25 #define S3C_I2SV2_DIV_RCLK (2) 26 #define S3C_I2SV2_DIV_PRESCALER (3) 27 28 #define S3C_I2SV2_CLKSRC_PCLK 0 29 #define S3C_I2SV2_CLKSRC_AUDIOBUS 1 30 #define S3C_I2SV2_CLKSRC_CDCLK 2 31 32 /* Set this flag for I2S controllers that have the bit IISMOD[12] 33 * bridge/break RCLK signal and external Xi2sCDCLK pin. 34 */ 35 #define S3C_FEATURE_CDCLKCON (1 << 0) 36 37 /** 38 * struct s3c_i2sv2_info - S3C I2S-V2 information 39 * @dev: The parent device passed to use from the probe. 40 * @regs: The pointer to the device registe block. 41 * @feature: Set of bit-flags indicating features of the controller. 42 * @master: True if the I2S core is the I2S bit clock master. 43 * @dma_playback: DMA information for playback channel. 44 * @dma_capture: DMA information for capture channel. 45 * @suspend_iismod: PM save for the IISMOD register. 46 * @suspend_iiscon: PM save for the IISCON register. 47 * @suspend_iispsr: PM save for the IISPSR register. 48 * 49 * This is the private codec state for the hardware associated with an 50 * I2S channel such as the register mappings and clock sources. 51 */ 52 struct s3c_i2sv2_info { 53 struct device *dev; 54 void __iomem *regs; 55 56 u32 feature; 57 58 struct clk *iis_pclk; 59 struct clk *iis_cclk; 60 61 unsigned char master; 62 63 struct s3c_dma_params *dma_playback; 64 struct s3c_dma_params *dma_capture; 65 66 u32 suspend_iismod; 67 u32 suspend_iiscon; 68 u32 suspend_iispsr; 69 70 unsigned long base; 71 }; 72 73 extern struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai); 74 75 struct s3c_i2sv2_rate_calc { 76 unsigned int clk_div; /* for prescaler */ 77 unsigned int fs_div; /* for root frame clock */ 78 }; 79 80 extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info, 81 unsigned int *fstab, 82 unsigned int rate, struct clk *clk); 83 84 /** 85 * s3c_i2sv2_probe - probe for i2s device helper 86 * @dai: The ASoC DAI structure supplied to the original probe. 87 * @i2s: Our local i2s structure to fill in. 88 * @base: The base address for the registers. 89 */ 90 extern int s3c_i2sv2_probe(struct snd_soc_dai *dai, 91 struct s3c_i2sv2_info *i2s, 92 unsigned long base); 93 94 /** 95 * s3c_i2sv2_register_dai - register dai with soc core 96 * @dev: DAI device 97 * @id: DAI ID 98 * @drv: The driver structure to register 99 * 100 * Fill in any missing fields and then register the given dai with the 101 * soc core. 102 */ 103 extern int s3c_i2sv2_register_dai(struct device *dev, int id, 104 struct snd_soc_dai_driver *drv); 105 106 #endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */ 107