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199 lines
5 KiB
C
199 lines
5 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/gpio-samsung.h>
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#include <plat/gpio-cfg.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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#include <linux/platform_data/asoc-s3c.h>
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static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out = {
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.addr_width = 4,
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};
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static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in = {
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.addr_width = 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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snd_soc_dai_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out,
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&s3c2412_i2s_pcm_stereo_in);
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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 = devm_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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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_prepare_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 (GPE0...GPE4) in correct mode */
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s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
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S3C_GPIO_PULL_NONE);
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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_unprepare(s3c2412_i2s.iis_cclk);
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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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u32 iismod;
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pr_debug("Entered %s\n", __func__);
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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_width(params)) {
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case 8:
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iismod |= S3C2412_IISMOD_8BIT;
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break;
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case 16:
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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 const struct snd_soc_component_driver s3c2412_i2s_component = {
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.name = "s3c2412-i2s",
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};
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static int s3c2412_iis_dev_probe(struct platform_device *pdev)
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{
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int ret = 0;
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struct resource *res;
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struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
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if (!pdata) {
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dev_err(&pdev->dev, "missing platform data");
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return -ENXIO;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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s3c2412_i2s.regs = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(s3c2412_i2s.regs))
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return PTR_ERR(s3c2412_i2s.regs);
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s3c2412_i2s_pcm_stereo_out.addr = res->start + S3C2412_IISTXD;
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s3c2412_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
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s3c2412_i2s_pcm_stereo_in.addr = res->start + S3C2412_IISRXD;
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s3c2412_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
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ret = samsung_asoc_dma_platform_register(&pdev->dev,
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pdata->dma_filter,
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NULL, NULL);
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if (ret) {
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pr_err("failed to register the DMA: %d\n", ret);
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return ret;
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}
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ret = s3c_i2sv2_register_component(&pdev->dev, -1,
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&s3c2412_i2s_component,
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&s3c2412_i2s_dai);
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if (ret)
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pr_err("failed to register the dai\n");
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return ret;
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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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.driver = {
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.name = "s3c2412-iis",
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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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