1 /* sound/soc/s3c24xx/s3c-i2s-v2.h
3 * ALSA Soc Audio Layer - S3C_I2SV2 I2S driver
5 * Copyright (c) 2007 Simtec Electronics
6 * http://armlinux.simtec.co.uk/
7 * Ben Dooks <ben@simtec.co.uk>
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.
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.
21 #ifndef __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H
22 #define __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H __FILE__
24 #define S3C_I2SV2_DIV_BCLK (1)
25 #define S3C_I2SV2_DIV_RCLK (2)
26 #define S3C_I2SV2_DIV_PRESCALER (3)
28 #define S3C_I2SV2_CLKSRC_PCLK 0
29 #define S3C_I2SV2_CLKSRC_AUDIOBUS 1
30 #define S3C_I2SV2_CLKSRC_CDCLK 2
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 * @master: True if the I2S core is the I2S bit clock master.
37 * @dma_playback: DMA information for playback channel.
38 * @dma_capture: DMA information for capture channel.
39 * @suspend_iismod: PM save for the IISMOD register.
40 * @suspend_iiscon: PM save for the IISCON register.
41 * @suspend_iispsr: PM save for the IISPSR register.
43 * This is the private codec state for the hardware associated with an
44 * I2S channel such as the register mappings and clock sources.
46 struct s3c_i2sv2_info {
55 struct s3c_dma_params *dma_playback;
56 struct s3c_dma_params *dma_capture;
63 extern struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai);
65 struct s3c_i2sv2_rate_calc {
66 unsigned int clk_div; /* for prescaler */
67 unsigned int fs_div; /* for root frame clock */
70 extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info,
72 unsigned int rate, struct clk *clk);
75 * s3c_i2sv2_probe - probe for i2s device helper
76 * @pdev: The platform device supplied to the original probe.
77 * @dai: The ASoC DAI structure supplied to the original probe.
78 * @i2s: Our local i2s structure to fill in.
79 * @base: The base address for the registers.
81 extern int s3c_i2sv2_probe(struct platform_device *pdev,
82 struct snd_soc_dai *dai,
83 struct s3c_i2sv2_info *i2s,
87 * s3c_i2sv2_register_dai - register dai with soc core
88 * @dai: The snd_soc_dai structure to register
90 * Fill in any missing fields and then register the given dai with the
93 extern int s3c_i2sv2_register_dai(struct snd_soc_dai *dai);
95 #endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */