| Ben Dooks | dc85447 | 2009-03-04 00:49:30 +0000 | [diff] [blame] | 1 | /* sound/soc/s3c24xx/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 | /** |
| 29 | * struct s3c_i2sv2_info - S3C I2S-V2 information |
| 30 | * @dev: The parent device passed to use from the probe. |
| 31 | * @regs: The pointer to the device registe block. |
| 32 | * @master: True if the I2S core is the I2S bit clock master. |
| 33 | * @dma_playback: DMA information for playback channel. |
| 34 | * @dma_capture: DMA information for capture channel. |
| 35 | * @suspend_iismod: PM save for the IISMOD register. |
| 36 | * @suspend_iiscon: PM save for the IISCON register. |
| 37 | * @suspend_iispsr: PM save for the IISPSR register. |
| 38 | * |
| 39 | * This is the private codec state for the hardware associated with an |
| 40 | * I2S channel such as the register mappings and clock sources. |
| 41 | */ |
| 42 | struct s3c_i2sv2_info { |
| 43 | struct device *dev; |
| 44 | void __iomem *regs; |
| 45 | |
| 46 | struct clk *iis_pclk; |
| 47 | struct clk *iis_cclk; |
| 48 | struct clk *iis_clk; |
| 49 | |
| 50 | unsigned char master; |
| 51 | |
| 52 | struct s3c24xx_pcm_dma_params *dma_playback; |
| 53 | struct s3c24xx_pcm_dma_params *dma_capture; |
| 54 | |
| 55 | u32 suspend_iismod; |
| 56 | u32 suspend_iiscon; |
| 57 | u32 suspend_iispsr; |
| 58 | }; |
| 59 | |
| 60 | struct s3c_i2sv2_rate_calc { |
| 61 | unsigned int clk_div; /* for prescaler */ |
| 62 | unsigned int fs_div; /* for root frame clock */ |
| 63 | }; |
| 64 | |
| 65 | extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info, |
| 66 | unsigned int *fstab, |
| 67 | unsigned int rate, struct clk *clk); |
| 68 | |
| 69 | /** |
| 70 | * s3c_i2sv2_probe - probe for i2s device helper |
| 71 | * @pdev: The platform device supplied to the original probe. |
| 72 | * @dai: The ASoC DAI structure supplied to the original probe. |
| 73 | * @i2s: Our local i2s structure to fill in. |
| 74 | * @base: The base address for the registers. |
| 75 | */ |
| 76 | extern int s3c_i2sv2_probe(struct platform_device *pdev, |
| 77 | struct snd_soc_dai *dai, |
| 78 | struct s3c_i2sv2_info *i2s, |
| 79 | unsigned long base); |
| 80 | |
| 81 | /** |
| 82 | * s3c_i2sv2_register_dai - register dai with soc core |
| 83 | * @dai: The snd_soc_dai structure to register |
| 84 | * |
| 85 | * Fill in any missing fields and then register the given dai with the |
| 86 | * soc core. |
| 87 | */ |
| 88 | extern int s3c_i2sv2_register_dai(struct snd_soc_dai *dai); |
| 89 | |
| 90 | #endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */ |