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 */
52struct 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
73extern struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai);
74
75struct s3c_i2sv2_rate_calc {
76	unsigned int	clk_div;	/* for prescaler */
77	unsigned int	fs_div;		/* for root frame clock */
78};
79
80extern 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 */
90extern 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_component - register component and 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 */
103extern int s3c_i2sv2_register_component(struct device *dev, int id,
104					struct snd_soc_component_driver *cmp_drv,
105					struct snd_soc_dai_driver *dai_drv);
106
107#endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */
108