194 lines
5.0 KiB
C
194 lines
5.0 KiB
C
/* sound/soc/samsung/s3c2412-i2s.c
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*
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* ALSA Soc Audio Layer - S3C2412 I2S driver
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*
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* Copyright (c) 2006 Wolfson Microelectronics PLC.
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* Graeme Gregory graeme.gregory@wolfsonmicro.com
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* linux@wolfsonmicro.com
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*
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* Copyright (c) 2007, 2004-2005 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <mach/regs-gpio.h>
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#include <mach/dma.h>
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#include "dma.h"
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#include "regs-i2s-v2.h"
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#include "s3c2412-i2s.h"
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static struct s3c2410_dma_client s3c2412_dma_client_out = {
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.name = "I2S PCM Stereo out"
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};
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static struct s3c2410_dma_client s3c2412_dma_client_in = {
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.name = "I2S PCM Stereo in"
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};
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static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
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.client = &s3c2412_dma_client_out,
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.channel = DMACH_I2S_OUT,
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.dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD,
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.dma_size = 4,
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};
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static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
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.client = &s3c2412_dma_client_in,
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.channel = DMACH_I2S_IN,
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.dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD,
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.dma_size = 4,
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};
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static struct s3c_i2sv2_info s3c2412_i2s;
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static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
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{
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int ret;
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pr_debug("Entered %s\n", __func__);
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ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
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if (ret)
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return ret;
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s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
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s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
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s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk");
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if (IS_ERR(s3c2412_i2s.iis_cclk)) {
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pr_err("failed to get i2sclk clock\n");
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iounmap(s3c2412_i2s.regs);
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return PTR_ERR(s3c2412_i2s.iis_cclk);
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}
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/* Set MPLL as the source for IIS CLK */
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clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
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clk_enable(s3c2412_i2s.iis_cclk);
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s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
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/* Configure the I2S pins in correct mode */
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s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
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s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
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s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
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s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
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s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
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return 0;
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}
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static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
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{
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clk_disable(s3c2412_i2s.iis_cclk);
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clk_put(s3c2412_i2s.iis_cclk);
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iounmap(s3c2412_i2s.regs);
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return 0;
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}
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static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *cpu_dai)
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{
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struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
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struct s3c_dma_params *dma_data;
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u32 iismod;
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pr_debug("Entered %s\n", __func__);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dma_data = i2s->dma_playback;
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else
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dma_data = i2s->dma_capture;
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snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
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iismod = readl(i2s->regs + S3C2412_IISMOD);
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pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S8:
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iismod |= S3C2412_IISMOD_8BIT;
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break;
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case SNDRV_PCM_FORMAT_S16_LE:
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iismod &= ~S3C2412_IISMOD_8BIT;
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break;
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}
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writel(iismod, i2s->regs + S3C2412_IISMOD);
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pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
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return 0;
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}
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#define S3C2412_I2S_RATES \
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(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
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SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
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static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
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.hw_params = s3c2412_i2s_hw_params,
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};
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static struct snd_soc_dai_driver s3c2412_i2s_dai = {
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.probe = s3c2412_i2s_probe,
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.remove = s3c2412_i2s_remove,
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.playback = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C2412_I2S_RATES,
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.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
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},
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.capture = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C2412_I2S_RATES,
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.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
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},
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.ops = &s3c2412_i2s_dai_ops,
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};
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static __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
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{
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return s3c_i2sv2_register_dai(&pdev->dev, -1, &s3c2412_i2s_dai);
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}
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static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_dai(&pdev->dev);
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return 0;
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}
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static struct platform_driver s3c2412_iis_driver = {
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.probe = s3c2412_iis_dev_probe,
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.remove = __devexit_p(s3c2412_iis_dev_remove),
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.driver = {
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.name = "s3c2412-iis",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(s3c2412_iis_driver);
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/* Module information */
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MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
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MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:s3c2412-iis");
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