- 根目录:
- sound
- soc
- samsung
- littlemill.c
/*
* Littlemill audio support
*
* Copyright 2011 Wolfson Microelectronics
*
* 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/soc-dapm.h>
#include <sound/jack.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include "../codecs/wm8994.h"
static int sample_rate = 44100;
static int littlemill_set_bias_level(struct snd_soc_card *card,
struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level)
{
struct snd_soc_dai *aif1_dai = card->rtd[0].codec_dai;
int ret;
if (dapm->dev != aif1_dai->dev)
return 0;
switch (level) {
case SND_SOC_BIAS_PREPARE:
/*
* If we've not already clocked things via hw_params()
* then do so now, otherwise these are noops.
*/
if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
WM8994_FLL_SRC_MCLK2, 32768,
sample_rate * 512);
if (ret < 0) {
pr_err("Failed to start FLL: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(aif1_dai,
WM8994_SYSCLK_FLL1,
sample_rate * 512,
SND_SOC_CLOCK_IN);
if (ret < 0) {
pr_err("Failed to set SYSCLK: %d\n", ret);
return ret;
}
}
break;
default:
break;
}
return 0;
}
static int littlemill_set_bias_level_post(struct snd_soc_card *card,
struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level)
{
struct snd_soc_dai *aif1_dai = card->rtd[0].codec_dai;
int ret;
if (dapm->dev != aif1_dai->dev)
return 0;
switch (level) {
case SND_SOC_BIAS_STANDBY:
ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
32768, SND_SOC_CLOCK_IN);
if (ret < 0) {
pr_err("Failed to switch away from FLL1: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
0, 0, 0);
if (ret < 0) {
pr_err("Failed to stop FLL1: %d\n", ret);
return ret;
}
break;
default:
break;
}
dapm->bias_level = level;
return 0;
}
static int littlemill_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;
int ret;
sample_rate = params_rate(params);
ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
WM8994_FLL_SRC_MCLK2, 32768,
sample_rate * 512);
if (ret < 0) {
pr_err("Failed to start FLL: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(codec_dai,
WM8994_SYSCLK_FLL1,
sample_rate * 512,
SND_SOC_CLOCK_IN);
if (ret < 0) {
pr_err("Failed to set SYSCLK: %d\n", ret);
return ret;
}
return 0;
}
static struct snd_soc_ops littlemill_ops = {
.hw_params = littlemill_hw_params,
};
static const struct snd_soc_pcm_stream baseband_params = {
.formats = SNDRV_PCM_FMTBIT_S32_LE,
.rate_min = 8000,
.rate_max = 8000,
.channels_min = 2,
.channels_max = 2,
};
static struct snd_soc_dai_link littlemill_dai[] = {
{
.name = "CPU",
.stream_name = "CPU",
.cpu_dai_name = "samsung-i2s.0",
.codec_dai_name = "wm8994-aif1",
.platform_name = "samsung-i2s.0",
.codec_name = "wm8994-codec",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM,
.ops = &littlemill_ops,
},
{
.name = "Baseband",
.stream_name = "Baseband",
.cpu_dai_name = "wm8994-aif2",
.codec_dai_name = "wm1250-ev1",
.codec_name = "wm1250-ev1.1-0027",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM,
.ignore_suspend = 1,
.params = &baseband_params,
},
};
static int bbclk_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_card *card = w->dapm->card;
struct snd_soc_dai *aif2_dai = card->rtd[1].cpu_dai;
int ret;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
WM8994_FLL_SRC_BCLK, 64 * 8000,
8000 * 256);
if (ret < 0) {
pr_err("Failed to start FLL: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
8000 * 256,
SND_SOC_CLOCK_IN);
if (ret < 0) {
pr_err("Failed to set SYSCLK: %d\n", ret);
return ret;
}
break;
case SND_SOC_DAPM_POST_PMD:
ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
32768, SND_SOC_CLOCK_IN);
if (ret < 0) {
pr_err("Failed to switch away from FLL2: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
0, 0, 0);
if (ret < 0) {
pr_err("Failed to stop FLL2: %d\n", ret);
return ret;
}
break;
default:
return -EINVAL;
}
return 0;
}
static const struct snd_kcontrol_new controls[] = {
SOC_DAPM_PIN_SWITCH("WM1250 Input"),
SOC_DAPM_PIN_SWITCH("WM1250 Output"),
};
static struct snd_soc_dapm_widget widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_MIC("AMIC", NULL),
SND_SOC_DAPM_MIC("DMIC", NULL),
SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
bbclk_ev,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
};
static struct snd_soc_dapm_route audio_paths[] = {
{ "Headphone", NULL, "HPOUT1L" },
{ "Headphone", NULL, "HPOUT1R" },
{ "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */
{ "IN1LN", NULL, "AMIC" },
{ "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */
{ "DMIC1DAT", NULL, "DMIC" },
{ "DMIC2DAT", NULL, "DMIC" },
{ "AIF2CLK", NULL, "Baseband Clock" },
};
static struct snd_soc_jack littlemill_headset;
static int littlemill_late_probe(struct snd_soc_card *card)
{
struct snd_soc_codec *codec = card->rtd[0].codec;
struct snd_soc_dai *aif1_dai = card->rtd[0].codec_dai;
struct snd_soc_dai *aif2_dai = card->rtd[1].cpu_dai;
int ret;
ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
32768, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
32768, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_jack_new(codec, "Headset",
SND_JACK_HEADSET | SND_JACK_MECHANICAL |
SND_JACK_BTN_0 | SND_JACK_BTN_1 |
SND_JACK_BTN_2 | SND_JACK_BTN_3 |
SND_JACK_BTN_4 | SND_JACK_BTN_5,
&littlemill_headset);
if (ret)
return ret;
/* This will check device compatibility itself */
wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL, NULL, NULL);
/* As will this */
wm8994_mic_detect(codec, &littlemill_headset, 1);
return 0;
}
static struct snd_soc_card littlemill = {
.name = "Littlemill",
.owner = THIS_MODULE,
.dai_link = littlemill_dai,
.num_links = ARRAY_SIZE(littlemill_dai),
.set_bias_level = littlemill_set_bias_level,
.set_bias_level_post = littlemill_set_bias_level_post,
.controls = controls,
.num_controls = ARRAY_SIZE(controls),
.dapm_widgets = widgets,
.num_dapm_widgets = ARRAY_SIZE(widgets),
.dapm_routes = audio_paths,
.num_dapm_routes = ARRAY_SIZE(audio_paths),
.late_probe = littlemill_late_probe,
};
static int littlemill_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &littlemill;
int ret;
card->dev = &pdev->dev;
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
ret);
return ret;
}
return 0;
}
static int littlemill_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
snd_soc_unregister_card(card);
return 0;
}
static struct platform_driver littlemill_driver = {
.driver = {
.name = "littlemill",
.owner = THIS_MODULE,
.pm = &snd_soc_pm_ops,
},
.probe = littlemill_probe,
.remove = littlemill_remove,
};
module_platform_driver(littlemill_driver);
MODULE_DESCRIPTION("Littlemill audio support");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:littlemill");