/*
   * sdp3430.c  --  SoC audio for TI OMAP3430 SDP
   *
   * Author: Misael Lopez Cruz <x0052729@ti.com>
   *
   * Based on:
   * Author: Steve Sakoman <steve@sakoman.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * version 2 as published by the Free Software Foundation.
   *
   * 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., 51 Franklin St, Fifth Floor, Boston, MA
   * 02110-1301 USA
   *
   */
  
  #include <linux/clk.h>
  #include <linux/platform_device.h>

  #include <linux/i2c/twl.h>

  #include <sound/core.h>
  #include <sound/pcm.h>
  #include <sound/soc.h>
  #include <sound/soc-dapm.h>

  #include <sound/jack.h>

  
  #include <asm/mach-types.h>
  #include <mach/hardware.h>
  #include <mach/gpio.h>

  #include <plat/mcbsp.h>

  
  #include "omap-mcbsp.h"
  #include "omap-pcm.h"
  #include "../codecs/twl4030.h"

  /* TWL4030 PMBR1 Register */
  #define TWL4030_INTBR_PMBR1		0x0D
  /* TWL4030 PMBR1 Register GPIO6 mux bit */
  #define TWL4030_GPIO6_PWM0_MUTE(value)	(value << 2)

  static struct snd_soc_card snd_soc_sdp3430;

  static int sdp3430_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->dai->codec_dai;
  	struct snd_soc_dai *cpu_dai = rtd->dai->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) {
  		printk(KERN_ERR "can't set codec DAI configuration
  ");
  		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) {
  		printk(KERN_ERR "can't set cpu DAI configuration
  ");
  		return ret;
  	}
  
  	/* Set the codec system clock for DAC and ADC */
  	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  					    SND_SOC_CLOCK_IN);
  	if (ret < 0) {
  		printk(KERN_ERR "can't set codec system clock
  ");
  		return ret;
  	}
  
  	return 0;
  }
  
  static struct snd_soc_ops sdp3430_ops = {
  	.hw_params = sdp3430_hw_params,
  };

  static int sdp3430_hw_voice_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->dai->codec_dai;
  	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  	int ret;
  
  	/* Set codec DAI configuration */
  	ret = snd_soc_dai_set_fmt(codec_dai,
  				SND_SOC_DAIFMT_DSP_A |
  				SND_SOC_DAIFMT_IB_NF |

  				SND_SOC_DAIFMT_CBM_CFM);

  	if (ret) {
  		printk(KERN_ERR "can't set codec DAI configuration
  ");
  		return ret;
  	}
  
  	/* Set cpu DAI configuration */
  	ret = snd_soc_dai_set_fmt(cpu_dai,
  				SND_SOC_DAIFMT_DSP_A |
  				SND_SOC_DAIFMT_IB_NF |
  				SND_SOC_DAIFMT_CBM_CFM);
  	if (ret < 0) {
  		printk(KERN_ERR "can't set cpu DAI configuration
  ");
  		return ret;
  	}
  
  	/* Set the codec system clock for DAC and ADC */
  	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  					    SND_SOC_CLOCK_IN);
  	if (ret < 0) {
  		printk(KERN_ERR "can't set codec system clock
  ");
  		return ret;
  	}
  
  	return 0;
  }
  
  static struct snd_soc_ops sdp3430_voice_ops = {
  	.hw_params = sdp3430_hw_voice_params,
  };

  /* Headset jack */
  static struct snd_soc_jack hs_jack;
  
  /* 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[] = {
  	{
  		.gpio = (OMAP_MAX_GPIO_LINES + 2),
  		.name = "hsdet-gpio",
  		.report = SND_JACK_HEADSET,
  		.debounce_time = 200,
  	},
  };

  /* SDP3430 machine DAPM */
  static const struct snd_soc_dapm_widget sdp3430_twl4030_dapm_widgets[] = {
  	SND_SOC_DAPM_MIC("Ext Mic", NULL),
  	SND_SOC_DAPM_SPK("Ext Spk", NULL),

  	SND_SOC_DAPM_MIC("Headset Mic", NULL),
  	SND_SOC_DAPM_HP("Headset Stereophone", NULL),

  };
  
  static const struct snd_soc_dapm_route audio_map[] = {
  	/* External Mics: MAINMIC, SUBMIC with bias*/
  	{"MAINMIC", NULL, "Mic Bias 1"},
  	{"SUBMIC", NULL, "Mic Bias 2"},
  	{"Mic Bias 1", NULL, "Ext Mic"},
  	{"Mic Bias 2", NULL, "Ext Mic"},
  
  	/* External Speakers: HFL, HFR */
  	{"Ext Spk", NULL, "HFL"},
  	{"Ext Spk", NULL, "HFR"},

  	/* Headset Mic: HSMIC with bias */

  	{"HSMIC", NULL, "Headset Mic Bias"},

  	{"Headset Mic Bias", NULL, "Headset Mic"},
  
  	/* Headset Stereophone (Headphone): HSOL, HSOR */
  	{"Headset Stereophone", NULL, "HSOL"},
  	{"Headset Stereophone", NULL, "HSOR"},

  };
  
  static int sdp3430_twl4030_init(struct snd_soc_codec *codec)
  {
  	int ret;
  
  	/* Add SDP3430 specific widgets */
  	ret = snd_soc_dapm_new_controls(codec, sdp3430_twl4030_dapm_widgets,
  				ARRAY_SIZE(sdp3430_twl4030_dapm_widgets));
  	if (ret)
  		return ret;
  
  	/* Set up SDP3430 specific audio path audio_map */
  	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
  
  	/* SDP3430 connected pins */
  	snd_soc_dapm_enable_pin(codec, "Ext Mic");
  	snd_soc_dapm_enable_pin(codec, "Ext Spk");

  	snd_soc_dapm_disable_pin(codec, "Headset Mic");
  	snd_soc_dapm_disable_pin(codec, "Headset Stereophone");

  
  	/* TWL4030 not connected pins */
  	snd_soc_dapm_nc_pin(codec, "AUXL");
  	snd_soc_dapm_nc_pin(codec, "AUXR");
  	snd_soc_dapm_nc_pin(codec, "CARKITMIC");
  	snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
  	snd_soc_dapm_nc_pin(codec, "DIGIMIC1");
  
  	snd_soc_dapm_nc_pin(codec, "OUTL");
  	snd_soc_dapm_nc_pin(codec, "OUTR");
  	snd_soc_dapm_nc_pin(codec, "EARPIECE");
  	snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
  	snd_soc_dapm_nc_pin(codec, "PREDRIVER");
  	snd_soc_dapm_nc_pin(codec, "CARKITL");
  	snd_soc_dapm_nc_pin(codec, "CARKITR");
  
  	ret = snd_soc_dapm_sync(codec);

  	if (ret)
  		return ret;

  	/* Headset jack detection */
  	ret = snd_soc_jack_new(&snd_soc_sdp3430, "Headset Jack",
  				SND_JACK_HEADSET, &hs_jack);
  	if (ret)
  		return ret;

  	ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
  				hs_jack_pins);
  	if (ret)
  		return ret;

  	ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
  				hs_jack_gpios);

  	return ret;
  }

  static int sdp3430_twl4030_voice_init(struct snd_soc_codec *codec)
  {
  	unsigned short reg;
  
  	/* Enable voice interface */
  	reg = codec->read(codec, TWL4030_REG_VOICE_IF);
  	reg |= TWL4030_VIF_DIN_EN | TWL4030_VIF_DOUT_EN | TWL4030_VIF_EN;
  	codec->write(codec, TWL4030_REG_VOICE_IF, reg);
  
  	return 0;
  }

  /* Digital audio interface glue - connects codec <--> CPU */

  static struct snd_soc_dai_link sdp3430_dai[] = {
  	{
  		.name = "TWL4030 I2S",
  		.stream_name = "TWL4030 Audio",
  		.cpu_dai = &omap_mcbsp_dai[0],
  		.codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
  		.init = sdp3430_twl4030_init,
  		.ops = &sdp3430_ops,
  	},
  	{
  		.name = "TWL4030 PCM",
  		.stream_name = "TWL4030 Voice",
  		.cpu_dai = &omap_mcbsp_dai[1],
  		.codec_dai = &twl4030_dai[TWL4030_DAI_VOICE],
  		.init = sdp3430_twl4030_voice_init,
  		.ops = &sdp3430_voice_ops,
  	},

  };
  
  /* Audio machine driver */

  static struct snd_soc_card snd_soc_sdp3430 = {

  	.name = "SDP3430",

  	.platform = &omap_soc_platform,

  	.dai_link = sdp3430_dai,
  	.num_links = ARRAY_SIZE(sdp3430_dai),

  };

  /* twl4030 setup */
  static struct twl4030_setup_data twl4030_setup = {
  	.ramp_delay_value = 3,
  	.sysclk = 26000,

  	.hs_extmute = 1,

  };

  /* Audio subsystem */
  static struct snd_soc_device sdp3430_snd_devdata = {

  	.card = &snd_soc_sdp3430,

  	.codec_dev = &soc_codec_dev_twl4030,

  	.codec_data = &twl4030_setup,

  };
  
  static struct platform_device *sdp3430_snd_device;
  
  static int __init sdp3430_soc_init(void)
  {
  	int ret;

  	u8 pin_mux;

  
  	if (!machine_is_omap_3430sdp()) {
  		pr_debug("Not SDP3430!
  ");
  		return -ENODEV;
  	}
  	printk(KERN_INFO "SDP3430 SoC init
  ");
  
  	sdp3430_snd_device = platform_device_alloc("soc-audio", -1);
  	if (!sdp3430_snd_device) {
  		printk(KERN_ERR "Platform device allocation failed
  ");
  		return -ENOMEM;
  	}
  
  	platform_set_drvdata(sdp3430_snd_device, &sdp3430_snd_devdata);
  	sdp3430_snd_devdata.dev = &sdp3430_snd_device->dev;

  	*(unsigned int *)sdp3430_dai[0].cpu_dai->private_data = 1; /* McBSP2 */
  	*(unsigned int *)sdp3430_dai[1].cpu_dai->private_data = 2; /* McBSP3 */

  	/* Set TWL4030 GPIO6 as EXTMUTE signal */

  	twl_i2c_read_u8(TWL4030_MODULE_INTBR, &pin_mux,

  						TWL4030_INTBR_PMBR1);
  	pin_mux &= ~TWL4030_GPIO6_PWM0_MUTE(0x03);
  	pin_mux |= TWL4030_GPIO6_PWM0_MUTE(0x02);

  	twl_i2c_write_u8(TWL4030_MODULE_INTBR, pin_mux,

  						TWL4030_INTBR_PMBR1);

  	ret = platform_device_add(sdp3430_snd_device);
  	if (ret)
  		goto err1;

  	return 0;

  
  err1:
  	printk(KERN_ERR "Unable to add platform device
  ");
  	platform_device_put(sdp3430_snd_device);
  
  	return ret;
  }
  module_init(sdp3430_soc_init);
  
  static void __exit sdp3430_soc_exit(void)
  {

  	snd_soc_jack_free_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
  				hs_jack_gpios);

  	platform_device_unregister(sdp3430_snd_device);
  }
  module_exit(sdp3430_soc_exit);
  
  MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
  MODULE_DESCRIPTION("ALSA SoC SDP3430");
  MODULE_LICENSE("GPL");