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29e189c29d
The core will ensure that the device is in either STANDBY or OFF bias before suspending, restoring the bias in the driver is unneeded. Some drivers doing slightly more roundabout things have been left alone for now. Tested-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
300 lines
7.2 KiB
C
300 lines
7.2 KiB
C
/*
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* ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
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*
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* Copyright (C) 2010 Texas Instruments, Inc
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*
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* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/mfd/davinci_voicecodec.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include <sound/soc-dapm.h>
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#include <sound/initval.h>
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#include <mach/dm365.h>
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#include "cq93vc.h"
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static inline unsigned int cq93vc_read(struct snd_soc_codec *codec,
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unsigned int reg)
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{
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struct davinci_vc *davinci_vc = codec->control_data;
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return readl(davinci_vc->base + reg);
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}
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static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg,
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unsigned int value)
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{
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struct davinci_vc *davinci_vc = codec->control_data;
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writel(value, davinci_vc->base + reg);
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return 0;
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}
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static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
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SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
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SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
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};
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static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
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{
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struct snd_soc_codec *codec = dai->codec;
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u8 reg = cq93vc_read(codec, DAVINCI_VC_REG09) & ~DAVINCI_VC_REG09_MUTE;
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if (mute)
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cq93vc_write(codec, DAVINCI_VC_REG09,
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reg | DAVINCI_VC_REG09_MUTE);
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else
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cq93vc_write(codec, DAVINCI_VC_REG09, reg);
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return 0;
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}
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static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct snd_soc_codec *codec = codec_dai->codec;
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struct davinci_vc *davinci_vc = codec->control_data;
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switch (freq) {
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case 22579200:
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case 27000000:
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case 33868800:
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davinci_vc->cq93vc.sysclk = freq;
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return 0;
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}
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return -EINVAL;
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}
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static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
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enum snd_soc_bias_level level)
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{
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switch (level) {
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case SND_SOC_BIAS_ON:
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cq93vc_write(codec, DAVINCI_VC_REG12,
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DAVINCI_VC_REG12_POWER_ALL_ON);
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break;
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case SND_SOC_BIAS_PREPARE:
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break;
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case SND_SOC_BIAS_STANDBY:
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cq93vc_write(codec, DAVINCI_VC_REG12,
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DAVINCI_VC_REG12_POWER_ALL_OFF);
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break;
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case SND_SOC_BIAS_OFF:
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/* force all power off */
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cq93vc_write(codec, DAVINCI_VC_REG12,
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DAVINCI_VC_REG12_POWER_ALL_OFF);
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break;
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}
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codec->bias_level = level;
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return 0;
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}
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#define CQ93VC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
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#define CQ93VC_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
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static struct snd_soc_dai_ops cq93vc_dai_ops = {
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.digital_mute = cq93vc_mute,
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.set_sysclk = cq93vc_set_dai_sysclk,
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};
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struct snd_soc_dai cq93vc_dai = {
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.name = "CQ93VC",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = CQ93VC_RATES,
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.formats = CQ93VC_FORMATS,},
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = CQ93VC_RATES,
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.formats = CQ93VC_FORMATS,},
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.ops = &cq93vc_dai_ops,
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};
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EXPORT_SYMBOL_GPL(cq93vc_dai);
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static int cq93vc_resume(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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return 0;
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}
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static struct snd_soc_codec *cq93vc_codec;
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static int cq93vc_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct device *dev = &pdev->dev;
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struct snd_soc_codec *codec;
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int ret;
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socdev->card->codec = cq93vc_codec;
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codec = socdev->card->codec;
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/* Register pcms */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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dev_err(dev, "%s: failed to create pcms\n", pdev->name);
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return ret;
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}
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/* Set controls */
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snd_soc_add_controls(codec, cq93vc_snd_controls,
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ARRAY_SIZE(cq93vc_snd_controls));
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/* Off, with power on */
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cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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return 0;
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}
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static int cq93vc_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_cq93vc = {
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.probe = cq93vc_probe,
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.remove = cq93vc_remove,
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.resume = cq93vc_resume,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_cq93vc);
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static __init int cq93vc_codec_probe(struct platform_device *pdev)
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{
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struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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int ret;
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codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
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if (codec == NULL) {
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dev_dbg(davinci_vc->dev,
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"could not allocate memory for codec data\n");
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return -ENOMEM;
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}
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davinci_vc->cq93vc.codec = codec;
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cq93vc_dai.dev = &pdev->dev;
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mutex_init(&codec->mutex);
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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codec->dev = &pdev->dev;
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codec->name = "CQ93VC";
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codec->owner = THIS_MODULE;
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codec->read = cq93vc_read;
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codec->write = cq93vc_write;
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codec->set_bias_level = cq93vc_set_bias_level;
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codec->dai = &cq93vc_dai;
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codec->num_dai = 1;
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codec->control_data = davinci_vc;
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cq93vc_codec = codec;
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ret = snd_soc_register_codec(codec);
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if (ret) {
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dev_err(davinci_vc->dev, "failed to register codec\n");
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goto fail1;
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}
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ret = snd_soc_register_dai(&cq93vc_dai);
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if (ret) {
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dev_err(davinci_vc->dev, "could register dai\n");
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goto fail2;
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}
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return 0;
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fail2:
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snd_soc_unregister_codec(codec);
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fail1:
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kfree(codec);
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cq93vc_codec = NULL;
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return ret;
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}
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static int __devexit cq93vc_codec_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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snd_soc_unregister_dai(&cq93vc_dai);
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snd_soc_unregister_codec(&codec);
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kfree(codec);
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cq93vc_codec = NULL;
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return 0;
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}
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static struct platform_driver cq93vc_codec_driver = {
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.driver = {
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.name = "cq93vc",
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.owner = THIS_MODULE,
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},
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.probe = cq93vc_codec_probe,
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.remove = __devexit_p(cq93vc_codec_remove),
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};
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static __init int cq93vc_init(void)
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{
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return platform_driver_probe(&cq93vc_codec_driver, cq93vc_codec_probe);
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}
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module_init(cq93vc_init);
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static __exit void cq93vc_exit(void)
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{
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platform_driver_unregister(&cq93vc_codec_driver);
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}
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module_exit(cq93vc_exit);
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MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
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MODULE_AUTHOR("Miguel Aguilar");
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MODULE_LICENSE("GPL");
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