diff options
Diffstat (limited to 'sound/soc/samsung/smdk_wm8580pcm.c')
| -rw-r--r-- | sound/soc/samsung/smdk_wm8580pcm.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/sound/soc/samsung/smdk_wm8580pcm.c b/sound/soc/samsung/smdk_wm8580pcm.c new file mode 100644 index 00000000..0d12092d --- /dev/null +++ b/sound/soc/samsung/smdk_wm8580pcm.c @@ -0,0 +1,206 @@ +/* + * 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"); |