ASoC: SAMSUNG: Add Machine driver for S/PDIF PCM audio
This patch add S/PDIF machine driver to support S/PDIF PCM audio on SMDKC100, SMDKC110 and SMDKV210 boards. Signed-off-by: Seungwhan Youn <sw.youn@samsung.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Seungwhan Youn
Mark Brown
parent
fc127ccccc
commit
b67089e4c2
@ -161,3 +161,10 @@ config SND_S5PV210_SOC_GONI_WM8994
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help
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Say Y if you want to add support for SoC audio on goni
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with the WM8994.
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config SND_SOC_SMDK_SPDIF
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tristate "SoC S/PDIF Audio support for SMDK"
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depends on SND_S3C24XX_SOC && (MACH_SMDKC100 || MACH_SMDKC110 || MACH_SMDKV210)
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select SND_S5P_SOC_SPDIF
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help
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Say Y if you want to add support for SoC S/PDIF audio on the SMDK.
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@ -35,6 +35,7 @@ snd-soc-smdk-wm9713-objs := smdk_wm9713.o
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snd-soc-s3c64xx-smartq-wm8987-objs := smartq_wm8987.o
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snd-soc-aquila-wm8994-objs := aquila_wm8994.o
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snd-soc-goni-wm8994-objs := goni_wm8994.o
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snd-soc-smdk-spdif-objs := smdk_spdif.o
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obj-$(CONFIG_SND_S3C24XX_SOC_JIVE_WM8750) += snd-soc-jive-wm8750.o
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obj-$(CONFIG_SND_S3C24XX_SOC_NEO1973_WM8753) += snd-soc-neo1973-wm8753.o
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@ -51,3 +52,4 @@ obj-$(CONFIG_SND_SOC_SMDK_WM9713) += snd-soc-smdk-wm9713.o
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obj-$(CONFIG_SND_S3C64XX_SOC_SMARTQ) += snd-soc-s3c64xx-smartq-wm8987.o
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obj-$(CONFIG_SND_S5PC110_SOC_AQUILA_WM8994) += snd-soc-aquila-wm8994.o
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obj-$(CONFIG_SND_S5PV210_SOC_GONI_WM8994) += snd-soc-goni-wm8994.o
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obj-$(CONFIG_SND_SOC_SMDK_SPDIF) += snd-soc-smdk-spdif.o
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223
sound/soc/s3c24xx/smdk_spdif.c
Normal file
223
sound/soc/s3c24xx/smdk_spdif.c
Normal file
@ -0,0 +1,223 @@
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/*
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* smdk_spdif.c -- S/PDIF audio for SMDK
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*
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* Copyright 2010 Samsung Electronics Co. Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/clk.h>
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#include <plat/devs.h>
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#include <sound/soc.h>
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#include "s3c-dma.h"
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#include "spdif.h"
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/* Audio clock settings are belonged to board specific part. Every
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* board can set audio source clock setting which is matched with H/W
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* like this function-'set_audio_clock_heirachy'.
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*/
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static int set_audio_clock_heirachy(struct platform_device *pdev)
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{
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struct clk *fout_epll, *mout_epll, *sclk_audio0, *sclk_spdif;
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int ret;
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fout_epll = clk_get(NULL, "fout_epll");
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if (IS_ERR(fout_epll)) {
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printk(KERN_WARNING "%s: Cannot find fout_epll.\n",
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__func__);
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return -EINVAL;
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}
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mout_epll = clk_get(NULL, "mout_epll");
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if (IS_ERR(fout_epll)) {
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printk(KERN_WARNING "%s: Cannot find mout_epll.\n",
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__func__);
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ret = -EINVAL;
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goto out1;
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}
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sclk_audio0 = clk_get(&pdev->dev, "sclk_audio");
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if (IS_ERR(sclk_audio0)) {
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printk(KERN_WARNING "%s: Cannot find sclk_audio.\n",
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__func__);
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ret = -EINVAL;
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goto out2;
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}
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sclk_spdif = clk_get(NULL, "sclk_spdif");
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if (IS_ERR(fout_epll)) {
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printk(KERN_WARNING "%s: Cannot find sclk_spdif.\n",
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__func__);
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ret = -EINVAL;
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goto out3;
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}
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/* Set audio clock heirachy for S/PDIF */
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clk_set_parent(mout_epll, fout_epll);
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clk_set_parent(sclk_audio0, mout_epll);
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clk_set_parent(sclk_spdif, sclk_audio0);
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clk_put(sclk_spdif);
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out3:
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clk_put(sclk_audio0);
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out2:
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clk_put(mout_epll);
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out1:
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clk_put(fout_epll);
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return ret;
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}
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/* We should haved to set clock directly on this part because of clock
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* scheme of Samsudng SoCs did not support to set rates from abstrct
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* clock of it's heirachy.
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*/
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static int set_audio_clock_rate(unsigned long epll_rate,
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unsigned long audio_rate)
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{
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struct clk *fout_epll, *sclk_spdif;
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fout_epll = clk_get(NULL, "fout_epll");
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if (IS_ERR(fout_epll)) {
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printk(KERN_ERR "%s: failed to get fout_epll\n", __func__);
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return -ENOENT;
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}
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clk_set_rate(fout_epll, epll_rate);
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clk_put(fout_epll);
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sclk_spdif = clk_get(NULL, "sclk_spdif");
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if (IS_ERR(sclk_spdif)) {
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printk(KERN_ERR "%s: failed to get sclk_spdif\n", __func__);
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return -ENOENT;
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}
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clk_set_rate(sclk_spdif, audio_rate);
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clk_put(sclk_spdif);
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return 0;
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}
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static int smdk_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned long pll_out, rclk_rate;
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int ret, ratio;
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switch (params_rate(params)) {
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case 44100:
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pll_out = 45158400;
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break;
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case 32000:
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case 48000:
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case 96000:
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pll_out = 49152000;
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break;
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default:
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return -EINVAL;
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}
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/* Setting ratio to 512fs helps to use S/PDIF with HDMI without
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* modify S/PDIF ASoC machine driver.
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*/
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ratio = 512;
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rclk_rate = params_rate(params) * ratio;
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/* Set audio source clock rates */
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ret = set_audio_clock_rate(pll_out, rclk_rate);
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if (ret < 0)
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return ret;
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/* Set S/PDIF uses internal source clock */
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ret = snd_soc_dai_set_sysclk(cpu_dai, SND_SOC_SPDIF_INT_MCLK,
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rclk_rate, SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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return ret;
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}
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static struct snd_soc_ops smdk_spdif_ops = {
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.hw_params = smdk_hw_params,
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};
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static struct snd_soc_card smdk;
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static struct snd_soc_dai_link smdk_dai = {
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.name = "S/PDIF",
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.stream_name = "S/PDIF PCM Playback",
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.platform_name = "s3c24xx-pcm-audio",
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.cpu_dai_name = "samsung-spdif",
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.codec_dai_name = "dit-hifi",
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.codec_name = "spdif-dit",
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.ops = &smdk_spdif_ops,
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};
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static struct snd_soc_card smdk = {
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.name = "SMDK-S/PDIF",
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.dai_link = &smdk_dai,
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.num_links = 1,
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};
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static struct platform_device *smdk_snd_spdif_dit_device;
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static struct platform_device *smdk_snd_spdif_device;
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static int __init smdk_init(void)
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{
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int ret;
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smdk_snd_spdif_dit_device = platform_device_alloc("spdif-dit", -1);
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if (!smdk_snd_spdif_dit_device)
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return -ENOMEM;
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ret = platform_device_add(smdk_snd_spdif_dit_device);
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if (ret)
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goto err2;
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smdk_snd_spdif_device = platform_device_alloc("soc-audio", -1);
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if (!smdk_snd_spdif_device) {
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ret = -ENOMEM;
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goto err2;
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}
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platform_set_drvdata(smdk_snd_spdif_device, &smdk);
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ret = platform_device_add(smdk_snd_spdif_device);
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if (ret)
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goto err1;
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/* Set audio clock heirachy manually */
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ret = set_audio_clock_heirachy(smdk_snd_spdif_device);
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if (ret)
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goto err1;
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return 0;
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err1:
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platform_device_put(smdk_snd_spdif_device);
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err2:
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platform_device_put(smdk_snd_spdif_dit_device);
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return ret;
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}
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static void __exit smdk_exit(void)
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{
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platform_device_unregister(smdk_snd_spdif_device);
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}
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module_init(smdk_init);
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module_exit(smdk_exit);
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MODULE_AUTHOR("Seungwhan Youn, <sw.youn@samsung.com>");
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MODULE_DESCRIPTION("ALSA SoC SMDK+S/PDIF");
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MODULE_LICENSE("GPL");
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