Linux-2.6.33.2/sound/soc/s3c24xx/smdk64xx_wm8580.c
/*
* smdk64xx_wm8580.c
*
* Copyright (c) 2009 Samsung Electronics Co. Ltd
* Author: Jaswinder Singh <jassi.brar@samsung.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/platform_device.h>
#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include "../codecs/wm8580.h"
#include "s3c-dma.h"
#include "s3c64xx-i2s.h"
#define S3C64XX_I2S_V4 2
/* SMDK64XX has a 12MHZ crystal attached to WM8580 */
#define SMDK64XX_WM8580_FREQ 12000000
static int smdk64xx_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 *cpu_dai = rtd->dai->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
unsigned int pll_out;
int bfs, rfs, ret;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_U8:
case SNDRV_PCM_FORMAT_S8:
bfs = 16;
break;
case SNDRV_PCM_FORMAT_U16_LE:
case SNDRV_PCM_FORMAT_S16_LE:
bfs = 32;
break;
default:
return -EINVAL;
}
/* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
* This criterion can't be met if we request PLL output
* as {8000x256, 64000x256, 11025x256}Hz.
* As a wayout, we rather change rfs to a minimum value that
* results in (params_rate(params) * rfs), and itself, acceptable
* to both - the CODEC and the CPU.
*/
switch (params_rate(params)) {
case 16000:
case 22050:
case 32000:
case 44100:
case 48000:
case 88200:
case 96000:
rfs = 256;
break;
case 64000:
rfs = 384;
break;
case 8000:
case 11025:
rfs = 512;
break;
default:
return -EINVAL;
}
pll_out = params_rate(params) * rfs;
/* Set the Codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
/* Set the AP DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_CDCLK,
0, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* We use PCLK for basic ops in SoC-Slave mode */
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_PCLK,
0, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* Set WM8580 to drive MCLK from its PLLA */
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
WM8580_CLKSRC_PLLA);
if (ret < 0)
return ret;
/* Explicitly set WM8580-DAC to source from MCLK */
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_DAC_CLKSEL,
WM8580_CLKSRC_MCLK);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
SMDK64XX_WM8580_FREQ, pll_out);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
if (ret < 0)
return ret;
return 0;
}
/*
* SMDK64XX WM8580 DAI operations.
*/
static struct snd_soc_ops smdk64xx_ops = {
.hw_params = smdk64xx_hw_params,
};
/* SMDK64xx Playback widgets */
static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
SND_SOC_DAPM_HP("Front-L/R", NULL),
SND_SOC_DAPM_HP("Center/Sub", NULL),
SND_SOC_DAPM_HP("Rear-L/R", NULL),
};
/* SMDK64xx Capture widgets */
static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
SND_SOC_DAPM_MIC("MicIn", NULL),
SND_SOC_DAPM_LINE("LineIn", NULL),
};
/* SMDK-PAIFTX connections */
static const struct snd_soc_dapm_route audio_map_tx[] = {
/* MicIn feeds AINL */
{"AINL", NULL, "MicIn"},
/* LineIn feeds AINL/R */
{"AINL", NULL, "LineIn"},
{"AINR", NULL, "LineIn"},
};
/* SMDK-PAIFRX connections */
static const struct snd_soc_dapm_route audio_map_rx[] = {
/* Front Left/Right are fed VOUT1L/R */
{"Front-L/R", NULL, "VOUT1L"},
{"Front-L/R", NULL, "VOUT1R"},
/* Center/Sub are fed VOUT2L/R */
{"Center/Sub", NULL, "VOUT2L"},
{"Center/Sub", NULL, "VOUT2R"},
/* Rear Left/Right are fed VOUT3L/R */
{"Rear-L/R", NULL, "VOUT3L"},
{"Rear-L/R", NULL, "VOUT3R"},
};
static int smdk64xx_wm8580_init_paiftx(struct snd_soc_codec *codec)
{
/* Add smdk64xx specific Capture widgets */
snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_cpt,
ARRAY_SIZE(wm8580_dapm_widgets_cpt));
/* Set up PAIFTX audio path */
snd_soc_dapm_add_routes(codec, audio_map_tx, ARRAY_SIZE(audio_map_tx));
/* Enabling the microphone requires the fitting of a 0R
* resistor to connect the line from the microphone jack.
*/
snd_soc_dapm_disable_pin(codec, "MicIn");
/* signal a DAPM event */
snd_soc_dapm_sync(codec);
return 0;
}
static int smdk64xx_wm8580_init_paifrx(struct snd_soc_codec *codec)
{
/* Add smdk64xx specific Playback widgets */
snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_pbk,
ARRAY_SIZE(wm8580_dapm_widgets_pbk));
/* Set up PAIFRX audio path */
snd_soc_dapm_add_routes(codec, audio_map_rx, ARRAY_SIZE(audio_map_rx));
/* signal a DAPM event */
snd_soc_dapm_sync(codec);
return 0;
}
static struct snd_soc_dai_link smdk64xx_dai[] = {
{ /* Primary Playback i/f */
.name = "WM8580 PAIF RX",
.stream_name = "Playback",
.cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
.codec_dai = &wm8580_dai[WM8580_DAI_PAIFRX],
.init = smdk64xx_wm8580_init_paifrx,
.ops = &smdk64xx_ops,
},
{ /* Primary Capture i/f */
.name = "WM8580 PAIF TX",
.stream_name = "Capture",
.cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
.codec_dai = &wm8580_dai[WM8580_DAI_PAIFTX],
.init = smdk64xx_wm8580_init_paiftx,
.ops = &smdk64xx_ops,
},
};
static struct snd_soc_card smdk64xx = {
.name = "smdk64xx",
.platform = &s3c24xx_soc_platform,
.dai_link = smdk64xx_dai,
.num_links = ARRAY_SIZE(smdk64xx_dai),
};
static struct snd_soc_device smdk64xx_snd_devdata = {
.card = &smdk64xx,
.codec_dev = &soc_codec_dev_wm8580,
};
static struct platform_device *smdk64xx_snd_device;
static int __init smdk64xx_audio_init(void)
{
int ret;
smdk64xx_snd_device = platform_device_alloc("soc-audio", -1);
if (!smdk64xx_snd_device)
return -ENOMEM;
platform_set_drvdata(smdk64xx_snd_device, &smdk64xx_snd_devdata);
smdk64xx_snd_devdata.dev = &smdk64xx_snd_device->dev;
ret = platform_device_add(smdk64xx_snd_device);
if (ret)
platform_device_put(smdk64xx_snd_device);
return ret;
}
module_init(smdk64xx_audio_init);
MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
MODULE_DESCRIPTION("ALSA SoC SMDK64XX WM8580");
MODULE_LICENSE("GPL");