87bea31c7b
The core will sync DAPM as part of the card initialization, there is no need for machine drivers to do so during their setup. OMAP drivers are omitted as I know Peter already has patches for them. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
280 lines
6.8 KiB
C
280 lines
6.8 KiB
C
/*
|
|
* sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
|
|
* ATMEL AT91SAM9G20ek board.
|
|
*
|
|
* Copyright (C) 2005 SAN People
|
|
* Copyright (C) 2008 Atmel
|
|
*
|
|
* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
|
|
*
|
|
* Based on ati_b1_wm8731.c by:
|
|
* Frank Mandarino <fmandarino@endrelia.com>
|
|
* Copyright 2006 Endrelia Technologies Inc.
|
|
* Based on corgi.c by:
|
|
* Copyright 2005 Wolfson Microelectronics PLC.
|
|
* Copyright 2005 Openedhand 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/i2c.h>
|
|
|
|
#include <linux/atmel-ssc.h>
|
|
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
#include <mach/hardware.h>
|
|
#include <mach/gpio.h>
|
|
|
|
#include "../codecs/wm8731.h"
|
|
#include "atmel-pcm.h"
|
|
#include "atmel_ssc_dai.h"
|
|
|
|
#define MCLK_RATE 12000000
|
|
|
|
/*
|
|
* As shipped the board does not have inputs. However, it is relatively
|
|
* straightforward to modify the board to hook them up so support is left
|
|
* in the driver.
|
|
*/
|
|
#undef ENABLE_MIC_INPUT
|
|
|
|
static struct clk *mclk;
|
|
|
|
static int at91sam9g20ek_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 ret;
|
|
|
|
/* set 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 cpu 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;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_ops at91sam9g20ek_ops = {
|
|
.hw_params = at91sam9g20ek_hw_params,
|
|
};
|
|
|
|
static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
|
|
struct snd_soc_dapm_context *dapm,
|
|
enum snd_soc_bias_level level)
|
|
{
|
|
static int mclk_on;
|
|
int ret = 0;
|
|
|
|
switch (level) {
|
|
case SND_SOC_BIAS_ON:
|
|
case SND_SOC_BIAS_PREPARE:
|
|
if (!mclk_on)
|
|
ret = clk_enable(mclk);
|
|
if (ret == 0)
|
|
mclk_on = 1;
|
|
break;
|
|
|
|
case SND_SOC_BIAS_OFF:
|
|
case SND_SOC_BIAS_STANDBY:
|
|
if (mclk_on)
|
|
clk_disable(mclk);
|
|
mclk_on = 0;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
|
|
SND_SOC_DAPM_MIC("Int Mic", NULL),
|
|
SND_SOC_DAPM_SPK("Ext Spk", NULL),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route intercon[] = {
|
|
|
|
/* speaker connected to LHPOUT */
|
|
{"Ext Spk", NULL, "LHPOUT"},
|
|
|
|
/* mic is connected to Mic Jack, with WM8731 Mic Bias */
|
|
{"MICIN", NULL, "Mic Bias"},
|
|
{"Mic Bias", NULL, "Int Mic"},
|
|
};
|
|
|
|
/*
|
|
* Logic for a wm8731 as connected on a at91sam9g20ek board.
|
|
*/
|
|
static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
struct snd_soc_codec *codec = rtd->codec;
|
|
struct snd_soc_dai *codec_dai = rtd->codec_dai;
|
|
struct snd_soc_dapm_context *dapm = &codec->dapm;
|
|
int ret;
|
|
|
|
printk(KERN_DEBUG
|
|
"at91sam9g20ek_wm8731 "
|
|
": at91sam9g20ek_wm8731_init() called\n");
|
|
|
|
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
|
|
MCLK_RATE, SND_SOC_CLOCK_IN);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Add specific widgets */
|
|
snd_soc_dapm_new_controls(dapm, at91sam9g20ek_dapm_widgets,
|
|
ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
|
|
/* Set up specific audio path interconnects */
|
|
snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
|
|
|
|
/* not connected */
|
|
snd_soc_dapm_nc_pin(dapm, "RLINEIN");
|
|
snd_soc_dapm_nc_pin(dapm, "LLINEIN");
|
|
|
|
#ifdef ENABLE_MIC_INPUT
|
|
snd_soc_dapm_enable_pin(dapm, "Int Mic");
|
|
#else
|
|
snd_soc_dapm_nc_pin(dapm, "Int Mic");
|
|
#endif
|
|
|
|
/* always connected */
|
|
snd_soc_dapm_enable_pin(dapm, "Ext Spk");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_dai_link at91sam9g20ek_dai = {
|
|
.name = "WM8731",
|
|
.stream_name = "WM8731 PCM",
|
|
.cpu_dai_name = "atmel-ssc-dai.0",
|
|
.codec_dai_name = "wm8731-hifi",
|
|
.init = at91sam9g20ek_wm8731_init,
|
|
.platform_name = "atmel-pcm-audio",
|
|
.codec_name = "wm8731.0-001b",
|
|
.ops = &at91sam9g20ek_ops,
|
|
};
|
|
|
|
static struct snd_soc_card snd_soc_at91sam9g20ek = {
|
|
.name = "AT91SAMG20-EK",
|
|
.dai_link = &at91sam9g20ek_dai,
|
|
.num_links = 1,
|
|
.set_bias_level = at91sam9g20ek_set_bias_level,
|
|
};
|
|
|
|
static struct platform_device *at91sam9g20ek_snd_device;
|
|
|
|
static int __init at91sam9g20ek_init(void)
|
|
{
|
|
struct clk *pllb;
|
|
int ret;
|
|
|
|
if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
|
|
return -ENODEV;
|
|
|
|
ret = atmel_ssc_set_audio(0);
|
|
if (ret != 0) {
|
|
pr_err("Failed to set SSC 0 for audio: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Codec MCLK is supplied by PCK0 - set it up.
|
|
*/
|
|
mclk = clk_get(NULL, "pck0");
|
|
if (IS_ERR(mclk)) {
|
|
printk(KERN_ERR "ASoC: Failed to get MCLK\n");
|
|
ret = PTR_ERR(mclk);
|
|
goto err;
|
|
}
|
|
|
|
pllb = clk_get(NULL, "pllb");
|
|
if (IS_ERR(pllb)) {
|
|
printk(KERN_ERR "ASoC: Failed to get PLLB\n");
|
|
ret = PTR_ERR(pllb);
|
|
goto err_mclk;
|
|
}
|
|
ret = clk_set_parent(mclk, pllb);
|
|
clk_put(pllb);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
|
|
goto err_mclk;
|
|
}
|
|
|
|
clk_set_rate(mclk, MCLK_RATE);
|
|
|
|
at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
|
|
if (!at91sam9g20ek_snd_device) {
|
|
printk(KERN_ERR "ASoC: Platform device allocation failed\n");
|
|
ret = -ENOMEM;
|
|
goto err_mclk;
|
|
}
|
|
|
|
platform_set_drvdata(at91sam9g20ek_snd_device,
|
|
&snd_soc_at91sam9g20ek);
|
|
|
|
ret = platform_device_add(at91sam9g20ek_snd_device);
|
|
if (ret) {
|
|
printk(KERN_ERR "ASoC: Platform device allocation failed\n");
|
|
goto err_device_add;
|
|
}
|
|
|
|
return ret;
|
|
|
|
err_device_add:
|
|
platform_device_put(at91sam9g20ek_snd_device);
|
|
err_mclk:
|
|
clk_put(mclk);
|
|
mclk = NULL;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit at91sam9g20ek_exit(void)
|
|
{
|
|
platform_device_unregister(at91sam9g20ek_snd_device);
|
|
at91sam9g20ek_snd_device = NULL;
|
|
clk_put(mclk);
|
|
mclk = NULL;
|
|
}
|
|
|
|
module_init(at91sam9g20ek_init);
|
|
module_exit(at91sam9g20ek_exit);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
|
|
MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
|
|
MODULE_LICENSE("GPL");
|