Quelle  omap-twl4030.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * omap-twl4030.c  --  SoC audio for TI SoC based boards with twl4030 codec
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com
 * All rights reserved.
 *
 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
 *
 * This driver replaces the following machine drivers:
 * omap3beagle (Author: Steve Sakoman <steve@sakoman.com>)
 * omap3evm (Author: Anuj Aggarwal <anuj.aggarwal@ti.com>)
 * overo (Author: Steve Sakoman <steve@sakoman.com>)
 * igep0020 (Author: Enric Balletbo i Serra <eballetbo@iseebcn.com>)
 * zoom2 (Author: Misael Lopez Cruz <misael.lopez@ti.com>)
 * sdp3430 (Author: Misael Lopez Cruz <misael.lopez@ti.com>)
 */

#include <linux/platform_device.h>
#include <linux/platform_data/omap-twl4030.h>
#include <linux/module.h>
#include <linux/of.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>

#include "omap-mcbsp.h"

struct omap_twl4030 {
 struct snd_soc_jack hs_jack;
};

static int omap_twl4030_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);
 unsigned int fmt;

 switch (params_channels(params)) {
 case 2: /* Stereo I2S mode */
  fmt = SND_SOC_DAIFMT_I2S |
   SND_SOC_DAIFMT_NB_NF |
   SND_SOC_DAIFMT_CBP_CFP;
  break;
 case 4: /* Four channel TDM mode */
  fmt = SND_SOC_DAIFMT_DSP_A |
   SND_SOC_DAIFMT_IB_NF |
   SND_SOC_DAIFMT_CBP_CFP;
  break;
 default:
  return -EINVAL;
 }

 return snd_soc_runtime_set_dai_fmt(rtd, fmt);
}

static const struct snd_soc_ops omap_twl4030_ops = {
 .hw_params = omap_twl4030_hw_params,
};

static const struct snd_soc_dapm_widget dapm_widgets[] = {
 SND_SOC_DAPM_SPK("Earpiece Spk", NULL),
 SND_SOC_DAPM_SPK("Handsfree Spk", NULL),
 SND_SOC_DAPM_HP("Headset Stereophone", NULL),
 SND_SOC_DAPM_SPK("Ext Spk", NULL),
 SND_SOC_DAPM_SPK("Carkit Spk", NULL),

 SND_SOC_DAPM_MIC("Main Mic", NULL),
 SND_SOC_DAPM_MIC("Sub Mic", NULL),
 SND_SOC_DAPM_MIC("Headset Mic", NULL),
 SND_SOC_DAPM_MIC("Carkit Mic", NULL),
 SND_SOC_DAPM_MIC("Digital0 Mic", NULL),
 SND_SOC_DAPM_MIC("Digital1 Mic", NULL),
 SND_SOC_DAPM_LINE("Line In", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
 /* Headset Stereophone:  HSOL, HSOR */
 {"Headset Stereophone", NULL, "HSOL"},
 {"Headset Stereophone", NULL, "HSOR"},
 /* External Speakers: HFL, HFR */
 {"Handsfree Spk", NULL, "HFL"},
 {"Handsfree Spk", NULL, "HFR"},
 /* External Speakers: PredrivL, PredrivR */
 {"Ext Spk", NULL, "PREDRIVEL"},
 {"Ext Spk", NULL, "PREDRIVER"},
 /* Carkit speakers:  CARKITL, CARKITR */
 {"Carkit Spk", NULL, "CARKITL"},
 {"Carkit Spk", NULL, "CARKITR"},
 /* Earpiece */
 {"Earpiece Spk", NULL, "EARPIECE"},

 /* External Mics: MAINMIC, SUBMIC with bias */
 {"MAINMIC", NULL, "Main Mic"},
 {"Main Mic", NULL, "Mic Bias 1"},
 {"SUBMIC", NULL, "Sub Mic"},
 {"Sub Mic", NULL, "Mic Bias 2"},
 /* Headset Mic: HSMIC with bias */
 {"HSMIC", NULL, "Headset Mic"},
 {"Headset Mic", NULL, "Headset Mic Bias"},
 /* Digital Mics: DIGIMIC0, DIGIMIC1 with bias */
 {"DIGIMIC0", NULL, "Digital0 Mic"},
 {"Digital0 Mic", NULL, "Mic Bias 1"},
 {"DIGIMIC1", NULL, "Digital1 Mic"},
 {"Digital1 Mic", NULL, "Mic Bias 2"},
 /* Carkit In: CARKITMIC */
 {"CARKITMIC", NULL, "Carkit Mic"},
 /* Aux In: AUXL, AUXR */
 {"AUXL", NULL, "Line In"},
 {"AUXR", NULL, "Line In"},
};

/* Headset jack detection DAPM pins */
static struct snd_soc_jack_pin hs_jack_pins[] = {
 {
  .pin = "Headset Mic",
  .mask = SND_JACK_MICROPHONE,
 },
 {
  .pin = "Headset Stereophone",
  .mask = SND_JACK_HEADPHONE,
 },
};

/* Headset jack detection gpios */
static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 {
  .name = "ti,jack-det",
  .report = SND_JACK_HEADSET,
  .debounce_time = 200,
 },
};

static inline void twl4030_disconnect_pin(struct snd_soc_dapm_context *dapm,
       int connected, char *pin)
{
 if (!connected)
  snd_soc_dapm_disable_pin(dapm, pin);
}

static int omap_twl4030_init(struct snd_soc_pcm_runtime *rtd)
{
 struct snd_soc_card *card = rtd->card;
 struct snd_soc_dapm_context *dapm = &card->dapm;
 struct omap_tw4030_pdata *pdata = dev_get_platdata(card->dev);
 struct omap_twl4030 *priv = snd_soc_card_get_drvdata(card);
 int ret = 0;

 /*
 * This is a bit of a hack, but the GPIO is optional so we
 * only want to add the jack detection if the GPIO is there.
 */
 if (of_property_present(card->dev->of_node, "ti,jack-det-gpio")) {
  hs_jack_gpios[0].gpiod_dev = card->dev;
  hs_jack_gpios[0].idx = 0;

  ret = snd_soc_card_jack_new_pins(rtd->card, "Headset Jack",
       SND_JACK_HEADSET,
       &priv->hs_jack, hs_jack_pins,
       ARRAY_SIZE(hs_jack_pins));
  if (ret)
   return ret;

  ret = snd_soc_jack_add_gpios(&priv->hs_jack,
          ARRAY_SIZE(hs_jack_gpios),
          hs_jack_gpios);
  if (ret)
   return ret;
 }

 /*
 * NULL pdata means we booted with DT. In this case the routing is
 * provided and the card is fully routed, no need to mark pins.
 */
 if (!pdata || !pdata->custom_routing)
  return ret;

 /* Disable not connected paths if not used */
 twl4030_disconnect_pin(dapm, pdata->has_ear, "Earpiece Spk");
 twl4030_disconnect_pin(dapm, pdata->has_hf, "Handsfree Spk");
 twl4030_disconnect_pin(dapm, pdata->has_hs, "Headset Stereophone");
 twl4030_disconnect_pin(dapm, pdata->has_predriv, "Ext Spk");
 twl4030_disconnect_pin(dapm, pdata->has_carkit, "Carkit Spk");

 twl4030_disconnect_pin(dapm, pdata->has_mainmic, "Main Mic");
 twl4030_disconnect_pin(dapm, pdata->has_submic, "Sub Mic");
 twl4030_disconnect_pin(dapm, pdata->has_hsmic, "Headset Mic");
 twl4030_disconnect_pin(dapm, pdata->has_carkitmic, "Carkit Mic");
 twl4030_disconnect_pin(dapm, pdata->has_digimic0, "Digital0 Mic");
 twl4030_disconnect_pin(dapm, pdata->has_digimic1, "Digital1 Mic");
 twl4030_disconnect_pin(dapm, pdata->has_linein, "Line In");

 return ret;
}

/* Digital audio interface glue - connects codec <--> CPU */
SND_SOC_DAILINK_DEFS(hifi,
 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")),
 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2")));

SND_SOC_DAILINK_DEFS(voice,
 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.3")),
 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-voice")),
 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.3")));

static struct snd_soc_dai_link omap_twl4030_dai_links[] = {
 {
  .name = "TWL4030 HiFi",
  .stream_name = "TWL4030 HiFi",
  .init = omap_twl4030_init,
  .ops = &omap_twl4030_ops,
  SND_SOC_DAILINK_REG(hifi),
 },
 {
  .name = "TWL4030 Voice",
  .stream_name = "TWL4030 Voice",
  .dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF |
      SND_SOC_DAIFMT_CBP_CFP,
  SND_SOC_DAILINK_REG(voice),
 },
};

/* Audio machine driver */
static struct snd_soc_card omap_twl4030_card = {
 .owner = THIS_MODULE,
 .dai_link = omap_twl4030_dai_links,
 .num_links = ARRAY_SIZE(omap_twl4030_dai_links),

 .dapm_widgets = dapm_widgets,
 .num_dapm_widgets = ARRAY_SIZE(dapm_widgets),
 .dapm_routes = audio_map,
 .num_dapm_routes = ARRAY_SIZE(audio_map),
};

static int omap_twl4030_probe(struct platform_device *pdev)
{
 struct omap_tw4030_pdata *pdata = dev_get_platdata(&pdev->dev);
 struct device_node *node = pdev->dev.of_node;
 struct snd_soc_card *card = &omap_twl4030_card;
 struct omap_twl4030 *priv;
 int ret = 0;

 card->dev = &pdev->dev;

 priv = devm_kzalloc(&pdev->dev, sizeof(struct omap_twl4030), GFP_KERNEL);
 if (priv == NULL)
  return -ENOMEM;

 if (node) {
  struct device_node *dai_node;
  struct property *prop;

  if (snd_soc_of_parse_card_name(card, "ti,model")) {
   dev_err(&pdev->dev, "Card name is not provided\n");
   return -ENODEV;
  }

  dai_node = of_parse_phandle(node, "ti,mcbsp", 0);
  if (!dai_node) {
   dev_err(&pdev->dev, "McBSP node is not provided\n");
   return -EINVAL;
  }
  omap_twl4030_dai_links[0].cpus->dai_name  = NULL;
  omap_twl4030_dai_links[0].cpus->of_node = dai_node;

  omap_twl4030_dai_links[0].platforms->name  = NULL;
  omap_twl4030_dai_links[0].platforms->of_node = dai_node;

  dai_node = of_parse_phandle(node, "ti,mcbsp-voice", 0);
  if (!dai_node) {
   card->num_links = 1;
  } else {
   omap_twl4030_dai_links[1].cpus->dai_name  = NULL;
   omap_twl4030_dai_links[1].cpus->of_node = dai_node;

   omap_twl4030_dai_links[1].platforms->name  = NULL;
   omap_twl4030_dai_links[1].platforms->of_node = dai_node;
  }

  /* Optional: audio routing can be provided */
  prop = of_find_property(node, "ti,audio-routing", NULL);
  if (prop) {
   ret = snd_soc_of_parse_audio_routing(card,
           "ti,audio-routing");
   if (ret)
    return ret;

   card->fully_routed = 1;
  }
 } else if (pdata) {
  if (pdata->card_name) {
   card->name = pdata->card_name;
  } else {
   dev_err(&pdev->dev, "Card name is not provided\n");
   return -ENODEV;
  }

  if (!pdata->voice_connected)
   card->num_links = 1;
 } else {
  dev_err(&pdev->dev, "Missing pdata\n");
  return -ENODEV;
 }

 snd_soc_card_set_drvdata(card, priv);
 ret = devm_snd_soc_register_card(&pdev->dev, card);
 if (ret) {
  dev_err(&pdev->dev, "devm_snd_soc_register_card() failed: %d\n",
   ret);
  return ret;
 }

 return 0;
}

static const struct of_device_id omap_twl4030_of_match[] = {
 {.compatible = "ti,omap-twl4030", },
 { },
};
MODULE_DEVICE_TABLE(of, omap_twl4030_of_match);

static struct platform_driver omap_twl4030_driver = {
 .driver = {
  .name = "omap-twl4030",
  .pm = &snd_soc_pm_ops,
  .of_match_table = omap_twl4030_of_match,
 },
 .probe = omap_twl4030_probe,
};

module_platform_driver(omap_twl4030_driver);

MODULE_AUTHOR("Peter Ujfalusi ");
MODULE_DESCRIPTION("ALSA SoC for TI SoC based boards with twl4030 codec");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:omap-twl4030");