/*
* zylonite.c -- SoC audio for Zylonite
*
* Copyright 2008 Wolfson Microelectronics PLC.
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* 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 <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "../codecs/wm9713.h"
#include "pxa2xx-ac97.h"
#include "pxa-ssp.h"
/*
* There is a physical switch SW15 on the board which changes the MCLK
* for the WM9713 between the standard AC97 master clock and the
* output of the CLK_POUT signal from the PXA.
*/
static int clk_pout;
module_param(clk_pout, int, 0);
MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
static struct clk *pout;
static struct snd_soc_card zylonite;
static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_MIC("Headset Microphone", NULL),
SND_SOC_DAPM_MIC("Handset Microphone", NULL),
SND_SOC_DAPM_SPK("Multiactor", NULL),
SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
};
/* Currently supported audio map */
static const struct snd_soc_dapm_route audio_map[] = {
/* Headphone output connected to HPL/HPR */
{ "Headphone", NULL, "HPL" },
{ "Headphone", NULL, "HPR" },
/* On-board earpiece */
{ "Headset Earpiece", NULL, "OUT3" },
/* Headphone mic */
{ "MIC2A", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "Headset Microphone" },
/* On-board mic */
{ "MIC1", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "Handset Microphone" },
/* Multiactor differentially connected over SPKL/SPKR */
{ "Multiactor", NULL, "SPKL" },
{ "Multiactor", NULL, "SPKR" },
};
static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
{
if (clk_pout)
snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
clk_get_rate(pout), 0);
return 0;
}
static int zylonite_voice_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;
unsigned int pll_out = 0;
unsigned int wm9713_div = 0;
int ret = 0;
int rate = params_rate(params);
int width = snd_pcm_format_physical_width(params_format(params));
/* Only support ratios that we can generate neatly from the AC97
* based master clock - in particular, this excludes 44.1kHz.
* In most applications the voice DAC will be used for telephony
* data so multiples of 8kHz will be the common case.
*/
switch (rate) {
case 8000:
wm9713_div = 12;
break;
case 16000:
wm9713_div = 6;
break;
case 48000:
wm9713_div = 2;
break;
default:
/* Don't support OSS emulation */
return -EINVAL;
}
/* Add 1 to the width for the leading clock cycle */
pll_out = rate * (width + 1) * 8;
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
if (ret < 0)
return ret;
if (clk_pout)
ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
WM9713_PCMDIV(wm9713_div));
else
ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
WM9713_PCMDIV(wm9713_div));
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops zylonite_voice_ops = {
.hw_params = zylonite_voice_hw_params,
};
static struct snd_soc_dai_link zylonite_dai[] = {
{
.name = "AC97",
.stream_name = "AC97 HiFi",
.codec_name = "wm9713-codec",
.platform_name = "pxa-pcm-audio",
.cpu_dai_name = "pxa2xx-ac97",
.codec_dai_name = "wm9713-hifi",
.init = zylonite_wm9713_init,
},
{
.name = "AC97 Aux",
.stream_name = "AC97 Aux",
.codec_name = "wm9713-codec",
.platform_name = "pxa-pcm-audio",
.cpu_dai_name = "pxa2xx-ac97-aux",
.codec_dai_name = "wm9713-aux",
},
{
.name = "WM9713 Voice",
.stream_name = "WM9713 Voice",
.codec_name = "wm9713-codec",
.platform_name = "pxa-pcm-audio",
.cpu_dai_name = "pxa-ssp-dai.2",
.codec_dai_name = "wm9713-voice",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &zylonite_voice_ops,
},
};
static int zylonite_probe(struct snd_soc_card *card)
{
int ret;
if (clk_pout) {
pout = clk_get(NULL, "CLK_POUT");
if (IS_ERR(pout)) {
dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
PTR_ERR(pout));
return PTR_ERR(pout);
}
ret = clk_enable(pout);
if (ret != 0) {
dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
ret);
clk_put(pout);
return ret;
}
dev_dbg(card->dev, "MCLK enabled at %luHz\n",
clk_get_rate(pout));
}
return 0;
}
static int zylonite_remove(struct snd_soc_card *card)
{
if (clk_pout) {
clk_disable(pout);
clk_put(pout);
}
return 0;
}
static int zylonite_suspend_post(struct snd_soc_card *card)
{
if (clk_pout)
clk_disable(pout);
return 0;
}
static int zylonite_resume_pre(struct snd_soc_card *card)
{
int ret = 0;
if (clk_pout) {
ret = clk_enable(pout);
if (ret != 0)
dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
ret);
}
return ret;
}
static struct snd_soc_card zylonite = {
.name = "Zylonite",
.owner = THIS_MODULE,
.probe = &zylonite_probe,
.remove = &zylonite_remove,
.suspend_post = &zylonite_suspend_post,
.resume_pre = &zylonite_resume_pre,
.dai_link = zylonite_dai,
.num_links = ARRAY_SIZE(zylonite_dai),
.dapm_widgets = zylonite_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(zylonite_dapm_widgets),
.dapm_routes = audio_map,
.num_dapm_routes = ARRAY_SIZE(audio_map),
};
static struct platform_device *zylonite_snd_ac97_device;
static int __init zylonite_init(void)
{
int ret;
zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
if (!zylonite_snd_ac97_device)
return -ENOMEM;
platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
ret = platform_device_add(zylonite_snd_ac97_device);
if (ret != 0)
platform_device_put(zylonite_snd_ac97_device);
return ret;
}
static void __exit zylonite_exit(void)
{
platform_device_unregister(zylonite_snd_ac97_device);
}
module_init(zylonite_init);
module_exit(zylonite_exit);
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
MODULE_LICENSE("GPL");