ASoC: SAMSUNG: Add WM8580 PCM Machine driver (b8eeee68) · Commits · 戴 / test

sound/soc/samsung/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -162,3 +162,11 @@ config SND_SOC_SAMSUNG_SMDK_SPDIF
		select SND_SAMSUNG_SPDIF
		help
		Say Y if you want to add support for SoC S/PDIF audio on the SMDK.

		config SND_SOC_SMDK_WM8580_PCM
		tristate "SoC PCM Audio support for WM8580 on SMDK"
		depends on SND_SOC_SAMSUNG && (MACH_SMDK6450 \|\| MACH_SMDKV210 \|\| MACH_SMDKC110)
		select SND_SOC_WM8580
		select SND_SAMSUNG_PCM
		help
		Say Y if you want to add support for SoC audio on the SMDK.

sound/soc/samsung/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,7 @@ snd-soc-smdk-wm9713-objs := smdk_wm9713.o
		snd-soc-s3c64xx-smartq-wm8987-objs := smartq_wm8987.o
		snd-soc-goni-wm8994-objs := goni_wm8994.o
		snd-soc-smdk-spdif-objs := smdk_spdif.o
		snd-soc-smdk-wm8580pcm-objs := smdk_wm8580pcm.o

		obj-$(CONFIG_SND_SOC_SAMSUNG_JIVE_WM8750) += snd-soc-jive-wm8750.o
		obj-$(CONFIG_SND_SOC_SAMSUNG_NEO1973_WM8753) += snd-soc-neo1973-wm8753.o
		@@ -51,3 +52,4 @@ obj-$(CONFIG_SND_SOC_SAMSUNG_SMDK_WM9713) += snd-soc-smdk-wm9713.o
		obj-$(CONFIG_SND_SOC_SMARTQ) += snd-soc-s3c64xx-smartq-wm8987.o
		obj-$(CONFIG_SND_SOC_SAMSUNG_SMDK_SPDIF) += snd-soc-smdk-spdif.o
		obj-$(CONFIG_SND_SOC_GONI_AQUILA_WM8994) += snd-soc-goni-wm8994.o
		obj-$(CONFIG_SND_SOC_SMDK_WM8580_PCM) += snd-soc-smdk-wm8580pcm.o

sound/soc/samsung/smdk_wm8580pcm.c

0 → 100644

+206 −0

Original line number	Diff line number	Diff line
		/*
		* sound/soc/samsung/smdk_wm8580pcm.c
		*
		* Copyright (c) 2011 Samsung Electronics Co. Ltd
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License as published by the
		* Free Software Foundation; either version 2 of the License, or (at your
		* option) any later version.
		*/
		#include <sound/soc.h>
		#include <sound/pcm_params.h>
		#include <sound/pcm.h>

		#include <asm/mach-types.h>

		#include "../codecs/wm8580.h"
		#include "dma.h"
		#include "pcm.h"

		/*
		* Board Settings:
		* o '1' means 'ON'
		* o '0' means 'OFF'
		* o 'X' means 'Don't care'
		*
		* SMDK6410, SMDK6440, SMDK6450 Base B/D: CFG1-0000, CFG2-1111
		* SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000
		*/

		#define SMDK_WM8580_EXT_OSC 12000000
		#define SMDK_WM8580_EXT_MCLK 4096000
		#define SMDK_WM8580_EXT_VOICE 2048000

		static unsigned long mclk_freq;
		static unsigned long xtal_freq;

		/*
		* If MCLK clock directly gets from XTAL, we don't have to use PLL
		* to make MCLK, but if XTAL clock source connects with other codec
		* pin (like XTI), we should have to set codec's PLL to make MCLK.
		* Because Samsung SoC does not support pcmcdclk output like I2S.
		*/

		static int smdk_wm8580_pcm_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct snd_soc_dai *codec_dai = rtd->codec_dai;
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
		int rfs, ret;

		switch (params_rate(params)) {
		case 8000:
		break;
		default:
		printk(KERN_ERR "%s:%d Sampling Rate %u not supported!\n",
		__func__, __LINE__, params_rate(params));
		return -EINVAL;
		}

		rfs = mclk_freq / params_rate(params) / 2;

		/* Set the codec DAI configuration */
		ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B
		\| SND_SOC_DAIFMT_IB_NF
		\| SND_SOC_DAIFMT_CBS_CFS);
		if (ret < 0)
		return ret;

		/* Set the cpu DAI configuration */
		ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_B
		\| SND_SOC_DAIFMT_IB_NF
		\| SND_SOC_DAIFMT_CBS_CFS);
		if (ret < 0)
		return ret;

		if (mclk_freq == xtal_freq) {
		ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK,
		mclk_freq, SND_SOC_CLOCK_IN);
		if (ret < 0)
		return ret;

		ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
		WM8580_CLKSRC_MCLK);
		if (ret < 0)
		return ret;
		} else {
		ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
		mclk_freq, SND_SOC_CLOCK_IN);
		if (ret < 0)
		return ret;

		ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
		WM8580_CLKSRC_PLLA);
		if (ret < 0)
		return ret;

		ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
		xtal_freq, mclk_freq);
		if (ret < 0)
		return ret;
		}

		/* Set PCM source clock on CPU */
		ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
		mclk_freq, SND_SOC_CLOCK_IN);
		if (ret < 0)
		return ret;

		/* Set SCLK_DIV for making bclk */
		ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
		if (ret < 0)
		return ret;

		return 0;
		}

		static struct snd_soc_ops smdk_wm8580_pcm_ops = {
		.hw_params = smdk_wm8580_pcm_hw_params,
		};

		static struct snd_soc_dai_link smdk_dai[] = {
		{
		.name = "WM8580 PAIF PCM RX",
		.stream_name = "Playback",
		.cpu_dai_name = "samsung-pcm.0",
		.codec_dai_name = "wm8580-hifi-playback",
		.platform_name = "samsung-audio",
		.codec_name = "wm8580-codec.0-001b",
		.ops = &smdk_wm8580_pcm_ops,
		}, {
		.name = "WM8580 PAIF PCM TX",
		.stream_name = "Capture",
		.cpu_dai_name = "samsung-pcm.0",
		.codec_dai_name = "wm8580-hifi-capture",
		.platform_name = "samsung-audio",
		.codec_name = "wm8580-codec.0-001b",
		.ops = &smdk_wm8580_pcm_ops,
		},
		};

		static struct snd_soc_card smdk_pcm = {
		.name = "SMDK-PCM",
		.dai_link = smdk_dai,
		.num_links = 2,
		};

		/*
		* After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1)
		* is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4),
		* 2.0484Mhz, directly with MCLK both Codec and SoC.
		*/
		static int __devinit snd_smdk_probe(struct platform_device *pdev)
		{
		int ret = 0;

		xtal_freq = SMDK_WM8580_EXT_OSC;
		mclk_freq = SMDK_WM8580_EXT_MCLK;

		if (machine_is_smdkc110() \|\| machine_is_smdkv210())
		xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE;

		smdk_pcm.dev = &pdev->dev;
		ret = snd_soc_register_card(&smdk_pcm);
		if (ret) {
		dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
		return ret;
		}

		return 0;
		}

		static int __devexit snd_smdk_remove(struct platform_device *pdev)
		{
		snd_soc_unregister_card(&smdk_pcm);
		platform_set_drvdata(pdev, NULL);
		return 0;
		}

		static struct platform_driver snd_smdk_driver = {
		.driver = {
		.owner = THIS_MODULE,
		.name = "samsung-smdk-pcm",
		},
		.probe = snd_smdk_probe,
		.remove = __devexit_p(snd_smdk_remove),
		};

		static int __init smdk_audio_init(void)
		{
		return platform_driver_register(&snd_smdk_driver);
		}

		module_init(smdk_audio_init);

		static void __exit smdk_audio_exit(void)
		{
		platform_driver_unregister(&snd_smdk_driver);
		}

		module_exit(smdk_audio_exit);

		MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
		MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM");
		MODULE_LICENSE("GPL");

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