text: // SPDX-License-Identifier: GPL-2.0+
  //
  // neo1973_wm8753.c - SoC audio for Openmoko Neo1973 and Freerunner devices
  //
  // Copyright 2007 Openmoko Inc
  // Author: Graeme Gregory <graeme@openmoko.org>
  // Copyright 2007 Wolfson Microelectronics PLC.
  // Author: Graeme Gregory
  //         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
  // Copyright 2009 Wolfson Microelectronics
  
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/gpio.h>
  
  #include <sound/soc.h>
  
  #include <mach/gpio-samsung.h>
  #include <asm/mach-types.h>
  #include "regs-iis.h"
  
  #include "../codecs/wm8753.h"
  #include "s3c24xx-i2s.h"
  
  static int neo1973_hifi_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 = asoc_rtd_to_codec(rtd, 0);
  	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  	unsigned int pll_out = 0, bclk = 0;
  	int ret = 0;
  	unsigned long iis_clkrate;
  
  	iis_clkrate = s3c24xx_i2s_get_clockrate();
  
  	switch (params_rate(params)) {
  	case 8000:
  	case 16000:
  		pll_out = 12288000;
  		break;
  	case 48000:
  		bclk = WM8753_BCLK_DIV_4;
  		pll_out = 12288000;
  		break;
  	case 96000:
  		bclk = WM8753_BCLK_DIV_2;
  		pll_out = 12288000;
  		break;
  	case 11025:
  		bclk = WM8753_BCLK_DIV_16;
  		pll_out = 11289600;
  		break;
  	case 22050:
  		bclk = WM8753_BCLK_DIV_8;
  		pll_out = 11289600;
  		break;
  	case 44100:
  		bclk = WM8753_BCLK_DIV_4;
  		pll_out = 11289600;
  		break;
  	case 88200:
  		bclk = WM8753_BCLK_DIV_2;
  		pll_out = 11289600;
  		break;
  	}
  
  	/* set the codec system clock for DAC and ADC */
  	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
  		SND_SOC_CLOCK_IN);
  	if (ret < 0)
  		return ret;
  
  	/* set MCLK division for sample rate */
  	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
  		S3C2410_IISMOD_32FS);
  	if (ret < 0)
  		return ret;
  
  	/* set codec BCLK division for sample rate */
  	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
  	if (ret < 0)
  		return ret;
  
  	/* set prescaler division for sample rate */
  	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
  		S3C24XX_PRESCALE(4, 4));
  	if (ret < 0)
  		return ret;
  
  	/* codec PLL input is PCLK/4 */
  	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
  		iis_clkrate / 4, pll_out);
  	if (ret < 0)
  		return ret;
  
  	return 0;
  }
  
  static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
  {
  	struct snd_soc_pcm_runtime *rtd = substream->private_data;
  	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  
  	/* disable the PLL */
  	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
  }
  
  /*
   * Neo1973 WM8753 HiFi DAI opserations.
   */
  static struct snd_soc_ops neo1973_hifi_ops = {
  	.hw_params = neo1973_hifi_hw_params,
  	.hw_free = neo1973_hifi_hw_free,
  };
  
  static int neo1973_voice_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 = asoc_rtd_to_codec(rtd, 0);
  	unsigned int pcmdiv = 0;
  	int ret = 0;
  	unsigned long iis_clkrate;
  
  	iis_clkrate = s3c24xx_i2s_get_clockrate();
  
  	if (params_rate(params) != 8000)
  		return -EINVAL;
  	if (params_channels(params) != 1)
  		return -EINVAL;
  
  	pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
  
  	/* set the codec system clock for DAC and ADC */
  	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
  		SND_SOC_CLOCK_IN);
  	if (ret < 0)
  		return ret;
  
  	/* set codec PCM division for sample rate */
  	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
  	if (ret < 0)
  		return ret;
  
  	/* configure and enable PLL for 12.288MHz output */
  	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
  		iis_clkrate / 4, 12288000);
  	if (ret < 0)
  		return ret;
  
  	return 0;
  }
  
  static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
  {
  	struct snd_soc_pcm_runtime *rtd = substream->private_data;
  	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  
  	/* disable the PLL */
  	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
  }
  
  static struct snd_soc_ops neo1973_voice_ops = {
  	.hw_params = neo1973_voice_hw_params,
  	.hw_free = neo1973_voice_hw_free,
  };
  
  static int gta02_speaker_enabled;
  
  static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_value *ucontrol)
  {
  	gta02_speaker_enabled = ucontrol->value.integer.value[0];
  
  	gpio_set_value(S3C2410_GPJ(2), !gta02_speaker_enabled);
  
  	return 0;
  }
  
  static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_value *ucontrol)
  {
  	ucontrol->value.integer.value[0] = gta02_speaker_enabled;
  	return 0;
  }
  
  static int lm4853_event(struct snd_soc_dapm_widget *w,
  			struct snd_kcontrol *k, int event)
  {
  	gpio_set_value(S3C2410_GPJ(1), SND_SOC_DAPM_EVENT_OFF(event));
  
  	return 0;
  }
  
  static const struct snd_soc_dapm_widget neo1973_wm8753_dapm_widgets[] = {
  	SND_SOC_DAPM_LINE("GSM Line Out", NULL),
  	SND_SOC_DAPM_LINE("GSM Line In", NULL),
  	SND_SOC_DAPM_MIC("Headset Mic", NULL),
  	SND_SOC_DAPM_MIC("Handset Mic", NULL),
  	SND_SOC_DAPM_SPK("Handset Spk", NULL),
  	SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
  };
  
  static const struct snd_soc_dapm_route neo1973_wm8753_routes[] = {
  	/* Connections to the GSM Module */
  	{"GSM Line Out", NULL, "MONO1"},
  	{"GSM Line Out", NULL, "MONO2"},
  	{"RXP", NULL, "GSM Line In"},
  	{"RXN", NULL, "GSM Line In"},
  
  	/* Connections to Headset */
  	{"MIC1", NULL, "Mic Bias"},
  	{"Mic Bias", NULL, "Headset Mic"},
  
  	/* Call Mic */
  	{"MIC2", NULL, "Mic Bias"},
  	{"MIC2N", NULL, "Mic Bias"},
  	{"Mic Bias", NULL, "Handset Mic"},
  
  	/* Connect the ALC pins */
  	{"ACIN", NULL, "ACOP"},
  
  	/* Connections to the amp */
  	{"Stereo Out", NULL, "LOUT1"},
  	{"Stereo Out", NULL, "ROUT1"},
  
  	/* Call Speaker */
  	{"Handset Spk", NULL, "LOUT2"},
  	{"Handset Spk", NULL, "ROUT2"},
  };
  
  static const struct snd_kcontrol_new neo1973_wm8753_controls[] = {
  	SOC_DAPM_PIN_SWITCH("GSM Line Out"),
  	SOC_DAPM_PIN_SWITCH("GSM Line In"),
  	SOC_DAPM_PIN_SWITCH("Headset Mic"),
  	SOC_DAPM_PIN_SWITCH("Handset Mic"),
  	SOC_DAPM_PIN_SWITCH("Handset Spk"),
  	SOC_DAPM_PIN_SWITCH("Stereo Out"),
  
  	SOC_SINGLE_BOOL_EXT("Amp Spk Switch", 0,
  		lm4853_get_spk,
  		lm4853_set_spk),
  };
  
  static int neo1973_wm8753_init(struct snd_soc_pcm_runtime *rtd)
  {
  	struct snd_soc_card *card = rtd->card;
  
  	/* set endpoints to default off mode */
  	snd_soc_dapm_disable_pin(&card->dapm, "GSM Line Out");
  	snd_soc_dapm_disable_pin(&card->dapm, "GSM Line In");
  	snd_soc_dapm_disable_pin(&card->dapm, "Headset Mic");
  	snd_soc_dapm_disable_pin(&card->dapm, "Handset Mic");
  	snd_soc_dapm_disable_pin(&card->dapm, "Stereo Out");
  	snd_soc_dapm_disable_pin(&card->dapm, "Handset Spk");
  
  	/* allow audio paths from the GSM modem to run during suspend */
  	snd_soc_dapm_ignore_suspend(&card->dapm, "GSM Line Out");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "GSM Line In");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Headset Mic");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Handset Mic");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Stereo Out");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Handset Spk");
  
  	return 0;
  }
  
  SND_SOC_DAILINK_DEFS(wm8753,
  	DAILINK_COMP_ARRAY(COMP_CPU("s3c24xx-iis")),
  	DAILINK_COMP_ARRAY(COMP_CODEC("wm8753.0-001a", "wm8753-hifi")),
  	DAILINK_COMP_ARRAY(COMP_PLATFORM("s3c24xx-iis")));
  
  SND_SOC_DAILINK_DEFS(bluetooth,
  	DAILINK_COMP_ARRAY(COMP_CPU("bt-sco-pcm")),
  	DAILINK_COMP_ARRAY(COMP_CODEC("wm8753.0-001a", "wm8753-voice")));
  
  static struct snd_soc_dai_link neo1973_dai[] = {
  { /* Hifi Playback - for similatious use with voice below */
  	.name = "WM8753",
  	.stream_name = "WM8753 HiFi",
  	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  		   SND_SOC_DAIFMT_CBM_CFM,
  	.init = neo1973_wm8753_init,
  	.ops = &neo1973_hifi_ops,
  	SND_SOC_DAILINK_REG(wm8753),
  },
  { /* Voice via BT */
  	.name = "Bluetooth",
  	.stream_name = "Voice",
  	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
  		   SND_SOC_DAIFMT_CBS_CFS,
  	.ops = &neo1973_voice_ops,
  	SND_SOC_DAILINK_REG(bluetooth),
  },
  };
  
  static struct snd_soc_aux_dev neo1973_aux_devs[] = {
  	{
  		.dlc = COMP_AUX("dfbmcs320.0"),
  	},
  };
  
  static struct snd_soc_codec_conf neo1973_codec_conf[] = {
  	{
  		.dlc = COMP_CODEC_CONF("lm4857.0-007c"),
  		.name_prefix = "Amp",
  	},
  };
  
  static const struct gpio neo1973_gta02_gpios[] = {
  	{ S3C2410_GPJ(2), GPIOF_OUT_INIT_HIGH, "GTA02_HP_IN" },
  	{ S3C2410_GPJ(1), GPIOF_OUT_INIT_HIGH, "GTA02_AMP_SHUT" },
  };
  
  static struct snd_soc_card neo1973 = {
  	.name = "neo1973",
  	.owner = THIS_MODULE,
  	.dai_link = neo1973_dai,
  	.num_links = ARRAY_SIZE(neo1973_dai),
  	.aux_dev = neo1973_aux_devs,
  	.num_aux_devs = ARRAY_SIZE(neo1973_aux_devs),
  	.codec_conf = neo1973_codec_conf,
  	.num_configs = ARRAY_SIZE(neo1973_codec_conf),
  
  	.controls = neo1973_wm8753_controls,
  	.num_controls = ARRAY_SIZE(neo1973_wm8753_controls),
  	.dapm_widgets = neo1973_wm8753_dapm_widgets,
  	.num_dapm_widgets = ARRAY_SIZE(neo1973_wm8753_dapm_widgets),
  	.dapm_routes = neo1973_wm8753_routes,
  	.num_dapm_routes = ARRAY_SIZE(neo1973_wm8753_routes),
  	.fully_routed = true,
  };
  
  static struct platform_device *neo1973_snd_device;
  
  static int __init neo1973_init(void)
  {
  	int ret;
  
  	if (!machine_is_neo1973_gta02())
  		return -ENODEV;
  
  	if (machine_is_neo1973_gta02()) {
  		neo1973.name = "neo1973gta02";
  		neo1973.num_aux_devs = 1;
  
  		ret = gpio_request_array(neo1973_gta02_gpios,
  				ARRAY_SIZE(neo1973_gta02_gpios));
  		if (ret)
  			return ret;
  	}
  
  	neo1973_snd_device = platform_device_alloc("soc-audio", -1);
  	if (!neo1973_snd_device) {
  		ret = -ENOMEM;
  		goto err_gpio_free;
  	}
  
  	platform_set_drvdata(neo1973_snd_device, &neo1973);
  	ret = platform_device_add(neo1973_snd_device);
  
  	if (ret)
  		goto err_put_device;
  
  	return 0;
  
  err_put_device:
  	platform_device_put(neo1973_snd_device);
  err_gpio_free:
  	if (machine_is_neo1973_gta02()) {
  		gpio_free_array(neo1973_gta02_gpios,
  				ARRAY_SIZE(neo1973_gta02_gpios));
  	}
  	return ret;
  }
  module_init(neo1973_init);
  
  static void __exit neo1973_exit(void)
  {
  	platform_device_unregister(neo1973_snd_device);
  
  	if (machine_is_neo1973_gta02()) {
  		gpio_free_array(neo1973_gta02_gpios,
  				ARRAY_SIZE(neo1973_gta02_gpios));
  	}
  }
  module_exit(neo1973_exit);
  
  /* Module information */
  MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org, www.openmoko.org");
  MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 and Frerunner");
  MODULE_LICENSE("GPL");
  