--- /dev/null
+/*
+ * 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 <linux/module.h>
+#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 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;
+
+ 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,
+};
+
+#define SMDK_DAI_FMT (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | \
+ SND_SOC_DAIFMT_CBS_CFS)
+
+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 = "wm8580.0-001b",
+ .dai_fmt = SMDK_DAI_FMT,
+ .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-pcm.0",
+ .codec_name = "wm8580.0-001b",
+ .dai_fmt = SMDK_DAI_FMT,
+ .ops = &smdk_wm8580_pcm_ops,
+ },
+};
+
+static struct snd_soc_card smdk_pcm = {
+ .name = "SMDK-PCM",
+ .owner = THIS_MODULE,
+ .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 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 = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
+ if (ret)
+ dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
+
+ return ret;
+}
+
+static struct platform_driver snd_smdk_driver = {
+ .driver = {
+ .name = "samsung-smdk-pcm",
+ },
+ .probe = snd_smdk_probe,
+};
+
+module_platform_driver(snd_smdk_driver);
+
+MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff