/*
   * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
   *
   * Author:	Nicolas Pitre
   * Created:	Dec 02, 2004
   * Copyright:	MontaVista Software Inc.
   *
   * 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.
   */
  
  #include <linux/init.h>
  #include <linux/io.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/dmaengine.h>
  
  #include <sound/core.h>
  #include <sound/ac97_codec.h>
  #include <sound/soc.h>
  #include <sound/pxa2xx-lib.h>
  #include <sound/dmaengine_pcm.h>
  
  #include <mach/hardware.h>
  #include <mach/regs-ac97.h>
  #include <mach/audio.h>
  
  #include "pxa2xx-ac97.h"
  
  static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
  {
  	pxa2xx_ac97_try_warm_reset(ac97);
  
  	pxa2xx_ac97_finish_reset(ac97);
  }
  
  static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
  {
  	pxa2xx_ac97_try_cold_reset(ac97);
  
  	pxa2xx_ac97_finish_reset(ac97);
  }
  
  static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  	.read	= pxa2xx_ac97_read,
  	.write	= pxa2xx_ac97_write,
  	.warm_reset	= pxa2xx_ac97_warm_reset,
  	.reset	= pxa2xx_ac97_cold_reset,
  };
  
  static unsigned long pxa2xx_ac97_pcm_stereo_in_req = 12;
  static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
  	.addr		= __PREG(PCDR),
  	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
  	.maxburst	= 32,
  	.filter_data	= &pxa2xx_ac97_pcm_stereo_in_req,
  };
  
  static unsigned long pxa2xx_ac97_pcm_stereo_out_req = 11;
  static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
  	.addr		= __PREG(PCDR),
  	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
  	.maxburst	= 32,
  	.filter_data	= &pxa2xx_ac97_pcm_stereo_out_req,
  };
  
  static unsigned long pxa2xx_ac97_pcm_aux_mono_out_req = 10;
  static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
  	.addr		= __PREG(MODR),
  	.addr_width	= DMA_SLAVE_BUSWIDTH_2_BYTES,
  	.maxburst	= 16,
  	.filter_data	= &pxa2xx_ac97_pcm_aux_mono_out_req,
  };
  
  static unsigned long pxa2xx_ac97_pcm_aux_mono_in_req = 9;
  static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
  	.addr		= __PREG(MODR),
  	.addr_width	= DMA_SLAVE_BUSWIDTH_2_BYTES,
  	.maxburst	= 16,
  	.filter_data	= &pxa2xx_ac97_pcm_aux_mono_in_req,
  };
  
  static unsigned long pxa2xx_ac97_pcm_aux_mic_mono_req = 8;
  static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
  	.addr		= __PREG(MCDR),
  	.addr_width	= DMA_SLAVE_BUSWIDTH_2_BYTES,
  	.maxburst	= 16,
  	.filter_data	= &pxa2xx_ac97_pcm_aux_mic_mono_req,
  };
  
  static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
  				 struct snd_pcm_hw_params *params,
  				 struct snd_soc_dai *cpu_dai)
  {
  	struct snd_dmaengine_dai_dma_data *dma_data;
  
  	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  		dma_data = &pxa2xx_ac97_pcm_stereo_out;
  	else
  		dma_data = &pxa2xx_ac97_pcm_stereo_in;
  
  	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
  
  	return 0;
  }
  
  static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
  				     struct snd_pcm_hw_params *params,
  				     struct snd_soc_dai *cpu_dai)
  {
  	struct snd_dmaengine_dai_dma_data *dma_data;
  
  	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  		dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
  	else
  		dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
  
  	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
  
  	return 0;
  }
  
  static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
  				     struct snd_pcm_hw_params *params,
  				     struct snd_soc_dai *cpu_dai)
  {
  	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  		return -ENODEV;
  	else
  		snd_soc_dai_set_dma_data(cpu_dai, substream,
  					 &pxa2xx_ac97_pcm_mic_mono_in);
  
  	return 0;
  }
  
  #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
  		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
  		SNDRV_PCM_RATE_48000)
  
  static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
  	.hw_params	= pxa2xx_ac97_hw_params,
  };
  
  static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
  	.hw_params	= pxa2xx_ac97_hw_aux_params,
  };
  
  static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
  	.hw_params	= pxa2xx_ac97_hw_mic_params,
  };
  
  /*
   * There is only 1 physical AC97 interface for pxa2xx, but it
   * has extra fifo's that can be used for aux DACs and ADCs.
   */
  static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
  {
  	.name = "pxa2xx-ac97",
  	.ac97_control = 1,
  	.playback = {
  		.stream_name = "AC97 Playback",
  		.channels_min = 2,
  		.channels_max = 2,
  		.rates = PXA2XX_AC97_RATES,
  		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
  	.capture = {
  		.stream_name = "AC97 Capture",
  		.channels_min = 2,
  		.channels_max = 2,
  		.rates = PXA2XX_AC97_RATES,
  		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
  	.ops = &pxa_ac97_hifi_dai_ops,
  },
  {
  	.name = "pxa2xx-ac97-aux",
  	.ac97_control = 1,
  	.playback = {
  		.stream_name = "AC97 Aux Playback",
  		.channels_min = 1,
  		.channels_max = 1,
  		.rates = PXA2XX_AC97_RATES,
  		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
  	.capture = {
  		.stream_name = "AC97 Aux Capture",
  		.channels_min = 1,
  		.channels_max = 1,
  		.rates = PXA2XX_AC97_RATES,
  		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
  	.ops = &pxa_ac97_aux_dai_ops,
  },
  {
  	.name = "pxa2xx-ac97-mic",
  	.ac97_control = 1,
  	.capture = {
  		.stream_name = "AC97 Mic Capture",
  		.channels_min = 1,
  		.channels_max = 1,
  		.rates = PXA2XX_AC97_RATES,
  		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
  	.ops = &pxa_ac97_mic_dai_ops,
  },
  };
  
  static const struct snd_soc_component_driver pxa_ac97_component = {
  	.name		= "pxa-ac97",
  };
  
  static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
  {
  	int ret;
  
  	if (pdev->id != -1) {
  		dev_err(&pdev->dev, "PXA2xx has only one AC97 port.
  ");
  		return -ENXIO;
  	}
  
  	ret = pxa2xx_ac97_hw_probe(pdev);
  	if (ret) {
  		dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)
  ", ret);
  		return ret;
  	}
  
  	ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
  	if (ret != 0)
  		return ret;
  
  	/* Punt most of the init to the SoC probe; we may need the machine
  	 * driver to do interesting things with the clocking to get us up
  	 * and running.
  	 */
  	return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
  					  pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
  }
  
  static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
  {
  	snd_soc_unregister_component(&pdev->dev);
  	snd_soc_set_ac97_ops(NULL);
  	pxa2xx_ac97_hw_remove(pdev);
  	return 0;
  }
  
  #ifdef CONFIG_PM_SLEEP
  static int pxa2xx_ac97_dev_suspend(struct device *dev)
  {
  	return pxa2xx_ac97_hw_suspend();
  }
  
  static int pxa2xx_ac97_dev_resume(struct device *dev)
  {
  	return pxa2xx_ac97_hw_resume();
  }
  
  static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
  		pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
  #endif
  
  static struct platform_driver pxa2xx_ac97_driver = {
  	.probe		= pxa2xx_ac97_dev_probe,
  	.remove		= pxa2xx_ac97_dev_remove,
  	.driver		= {
  		.name	= "pxa2xx-ac97",
  		.owner	= THIS_MODULE,
  #ifdef CONFIG_PM_SLEEP
  		.pm	= &pxa2xx_ac97_pm_ops,
  #endif
  	},
  };
  
  module_platform_driver(pxa2xx_ac97_driver);
  
  MODULE_AUTHOR("Nicolas Pitre");
  MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
  MODULE_LICENSE("GPL");