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/*
* smdk_wm8580.c
*
* Copyright (c) 2009 Samsung Electronics Co. Ltd
* Author: Jaswinder Singh <jassisinghbrar@gmail.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 <sound/soc.h>
#include <sound/pcm_params.h>
#include "../codecs/wm8580.h"
#include "i2s.h"
/*
* Default CFG switch settings to use this driver:
*
* SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
*/
/* SMDK has a 12MHZ crystal attached to WM8580 */
#define SMDK_WM8580_FREQ 12000000
static int smdk_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;
unsigned int pll_out;
int bfs, rfs, ret;
switch (params_width(params)) {
case 8:
bfs = 16;
break;
case 16:
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 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;
ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
SMDK_WM8580_FREQ, pll_out);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
pll_out, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
/*
* SMDK WM8580 DAI operations.
*/
static struct snd_soc_ops smdk_ops = {
.hw_params = smdk_hw_params,
};
/* SMDK Playback widgets */
static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
SND_SOC_DAPM_HP("Front", NULL),
SND_SOC_DAPM_HP("Center+Sub", NULL),
SND_SOC_DAPM_HP("Rear", NULL),
SND_SOC_DAPM_MIC("MicIn", NULL),
SND_SOC_DAPM_LINE("LineIn", NULL),
};
/* SMDK-PAIFTX connections */
static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
/* MicIn feeds AINL */
{"AINL", NULL, "MicIn"},
/* LineIn feeds AINL/R */
{"AINL", NULL, "LineIn"},
{"AINR", NULL, "LineIn"},
/* Front Left/Right are fed VOUT1L/R */
{"Front", NULL, "VOUT1L"},
{"Front", NULL, "VOUT1R"},
/* Center/Sub are fed VOUT2L/R */
{"Center+Sub", NULL, "VOUT2L"},
{"Center+Sub", NULL, "VOUT2R"},
/* Rear Left/Right are fed VOUT3L/R */
{"Rear", NULL, "VOUT3L"},
{"Rear", NULL, "VOUT3R"},
};
static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
{
/* Enabling the microphone requires the fitting of a 0R
* resistor to connect the line from the microphone jack.
*/
snd_soc_dapm_disable_pin(&rtd->card->dapm, "MicIn");
return 0;
}
enum {
PRI_PLAYBACK = 0,
PRI_CAPTURE,
};
#define SMDK_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
SND_SOC_DAIFMT_CBM_CFM)
static struct snd_soc_dai_link smdk_dai[] = {
[PRI_PLAYBACK] = { /* Primary Playback i/f */
.name = "WM8580 PAIF RX",
.stream_name = "Playback",
.cpu_dai_name = "samsung-i2s.2",
.codec_dai_name = "wm8580-hifi-playback",
.platform_name = "samsung-i2s.0",
.codec_name = "wm8580.0-001b",
.dai_fmt = SMDK_DAI_FMT,
.ops = &smdk_ops,
},
[PRI_CAPTURE] = { /* Primary Capture i/f */
.name = "WM8580 PAIF TX",
.stream_name = "Capture",
.cpu_dai_name = "samsung-i2s.2",
.codec_dai_name = "wm8580-hifi-capture",
.platform_name = "samsung-i2s.0",
.codec_name = "wm8580.0-001b",
.dai_fmt = SMDK_DAI_FMT,
.init = smdk_wm8580_init_paiftx,
.ops = &smdk_ops,
},
};
static struct snd_soc_card smdk = {
.name = "SMDK-I2S",
.owner = THIS_MODULE,
.dai_link = smdk_dai,
.num_links = ARRAY_SIZE(smdk_dai),
.dapm_widgets = smdk_wm8580_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
.dapm_routes = smdk_wm8580_audio_map,
.num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
};
static struct platform_device *smdk_snd_device;
static int __init smdk_audio_init(void)
{
int ret;
smdk_snd_device = platform_device_alloc("soc-audio", -1);
if (!smdk_snd_device)
return -ENOMEM;
platform_set_drvdata(smdk_snd_device, &smdk);
ret = platform_device_add(smdk_snd_device);
if (ret)
platform_device_put(smdk_snd_device);
return ret;
}
module_init(smdk_audio_init);
static void __exit smdk_audio_exit(void)
{
platform_device_unregister(smdk_snd_device);
}
module_exit(smdk_audio_exit);
MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
MODULE_LICENSE("GPL");
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