| /* sound/soc/s3c24xx/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 s3c_dma_params *dma_playback; |
| struct s3c_dma_params *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_dai - register 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_dai(struct device *dev, int id, |
| struct snd_soc_dai_driver *drv); |
| |
| #endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */ |
