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Diffstat (limited to 'sound/soc/s3c24xx/s3c-i2s-v2.h')
-rw-r--r-- | sound/soc/s3c24xx/s3c-i2s-v2.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/sound/soc/s3c24xx/s3c-i2s-v2.h b/sound/soc/s3c24xx/s3c-i2s-v2.h new file mode 100644 index 000000000000..f66854a77fb2 --- /dev/null +++ b/sound/soc/s3c24xx/s3c-i2s-v2.h | |||
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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 */ | ||