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// SPDX-License-Identifier: GPL-2.0-only
/*
* ASoC driver for TI DAVINCI EVM platform
*
* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/dma.h>
#include <asm/mach-types.h>
struct snd_soc_card_drvdata_davinci {
struct clk *mclk;
unsigned sysclk;
};
static int evm_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_card *soc_card = rtd->card;
struct snd_soc_card_drvdata_davinci *drvdata =
snd_soc_card_get_drvdata(soc_card);
if (drvdata->mclk)
return clk_prepare_enable(drvdata->mclk);
return 0;
}
static void evm_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_card *soc_card = rtd->card;
struct snd_soc_card_drvdata_davinci *drvdata =
snd_soc_card_get_drvdata(soc_card);
clk_disable_unprepare(drvdata->mclk);
}
static int evm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct snd_soc_card *soc_card = rtd->card;
int ret = 0;
unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
snd_soc_card_get_drvdata(soc_card))->sysclk;
/* set the codec system clock */
ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
if (ret < 0)
return ret;
/* set the CPU system clock */
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
if (ret < 0 && ret != -ENOTSUPP)
return ret;
return 0;
}
static const struct snd_soc_ops evm_ops = {
.startup = evm_startup,
.shutdown = evm_shutdown,
.hw_params = evm_hw_params,
};
/* davinci-evm machine dapm widgets */
static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_LINE("Line Out", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_LINE("Line In", NULL),
};
/* davinci-evm machine audio_mapnections to the codec pins */
static const struct snd_soc_dapm_route audio_map[] = {
/* Headphone connected to HPLOUT, HPROUT */
{"Headphone Jack", NULL, "HPLOUT"},
{"Headphone Jack", NULL, "HPROUT"},
/* Line Out connected to LLOUT, RLOUT */
{"Line Out", NULL, "LLOUT"},
{"Line Out", NULL, "RLOUT"},
/* Mic connected to (MIC3L | MIC3R) */
{"MIC3L", NULL, "Mic Bias"},
{"MIC3R", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Mic Jack"},
/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
{"LINE1L", NULL, "Line In"},
{"LINE2L", NULL, "Line In"},
{"LINE1R", NULL, "Line In"},
{"LINE2R", NULL, "Line In"},
};
/* Logic for a aic3x as connected on a davinci-evm */
static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_card *card = rtd->card;
struct device_node *np = card->dev->of_node;
int ret;
/* Add davinci-evm specific widgets */
snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
ARRAY_SIZE(aic3x_dapm_widgets));
if (np) {
ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
if (ret)
return ret;
} else {
/* Set up davinci-evm specific audio path audio_map */
snd_soc_dapm_add_routes(&card->dapm, audio_map,
ARRAY_SIZE(audio_map));
}
/* not connected */
snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");
return 0;
}
/*
* The struct is used as place holder. It will be completely
* filled with data from dt node.
*/
SND_SOC_DAILINK_DEFS(evm,
DAILINK_COMP_ARRAY(COMP_EMPTY()),
DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
DAILINK_COMP_ARRAY(COMP_EMPTY()));
static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
.name = "TLV320AIC3X",
.stream_name = "AIC3X",
.ops = &evm_ops,
.init = evm_aic3x_init,
.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
SND_SOC_DAIFMT_IB_NF,
SND_SOC_DAILINK_REG(evm),
};
static const struct of_device_id davinci_evm_dt_ids[] = {
{
.compatible = "ti,da830-evm-audio",
.data = (void *) &evm_dai_tlv320aic3x,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
/* davinci evm audio machine driver */
static struct snd_soc_card evm_soc_card = {
.owner = THIS_MODULE,
.num_links = 1,
};
static int davinci_evm_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct snd_soc_dai_link *dai;
struct snd_soc_card_drvdata_davinci *drvdata = NULL;
struct clk *mclk;
int ret = 0;
dai = (struct snd_soc_dai_link *) device_get_match_data(&pdev->dev);
if (!dai) {
dev_err(&pdev->dev, "Error: No device match found\n");
return -ENODEV;
}
evm_soc_card.dai_link = dai;
dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);
if (!dai->codecs->of_node)
return -EINVAL;
dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
if (!dai->cpus->of_node)
return -EINVAL;
dai->platforms->of_node = dai->cpus->of_node;
evm_soc_card.dev = &pdev->dev;
ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
if (ret)
return ret;
mclk = devm_clk_get(&pdev->dev, "mclk");
if (PTR_ERR(mclk) == -EPROBE_DEFER) {
return -EPROBE_DEFER;
} else if (IS_ERR(mclk)) {
dev_dbg(&pdev->dev, "mclk not found.\n");
mclk = NULL;
}
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
drvdata->mclk = mclk;
ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);
if (ret < 0) {
if (!drvdata->mclk) {
dev_err(&pdev->dev,
"No clock or clock rate defined.\n");
return -EINVAL;
}
drvdata->sysclk = clk_get_rate(drvdata->mclk);
} else if (drvdata->mclk) {
unsigned int requestd_rate = drvdata->sysclk;
clk_set_rate(drvdata->mclk, drvdata->sysclk);
drvdata->sysclk = clk_get_rate(drvdata->mclk);
if (drvdata->sysclk != requestd_rate)
dev_warn(&pdev->dev,
"Could not get requested rate %u using %u.\n",
requestd_rate, drvdata->sysclk);
}
snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);
if (ret)
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
return ret;
}
static struct platform_driver davinci_evm_driver = {
.probe = davinci_evm_probe,
.driver = {
.name = "davinci_evm",
.pm = &snd_soc_pm_ops,
.of_match_table = davinci_evm_dt_ids,
},
};
module_platform_driver(davinci_evm_driver);
MODULE_AUTHOR("Vladimir Barinov");
MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
MODULE_LICENSE("GPL");
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