/*
   * ALSA SoC I2S Audio Layer for the Stretch S6000 family
   *
   * Author:      Daniel Gloeckner, <dg@emlix.com>
   * Copyright:   (C) 2009 emlix GmbH <info@emlix.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.
   */
  
  #include <linux/init.h>
  #include <linux/module.h>
  #include <linux/device.h>
  #include <linux/delay.h>
  #include <linux/clk.h>
  #include <linux/interrupt.h>
  #include <linux/io.h>
  #include <linux/slab.h>
  
  #include <sound/core.h>
  #include <sound/pcm.h>
  #include <sound/pcm_params.h>
  #include <sound/initval.h>
  #include <sound/soc.h>
  
  #include "s6000-i2s.h"
  #include "s6000-pcm.h"
  
  struct s6000_i2s_dev {
  	dma_addr_t sifbase;
  	u8 __iomem *scbbase;
  	unsigned int wide;
  	unsigned int channel_in;
  	unsigned int channel_out;
  	unsigned int lines_in;
  	unsigned int lines_out;
  	struct s6000_pcm_dma_params dma_params;
  };
  
  #define S6_I2S_INTERRUPT_STATUS	0x00
  #define   S6_I2S_INT_OVERRUN	1
  #define   S6_I2S_INT_UNDERRUN	2
  #define   S6_I2S_INT_ALIGNMENT	4
  #define S6_I2S_INTERRUPT_ENABLE	0x04
  #define S6_I2S_INTERRUPT_RAW	0x08
  #define S6_I2S_INTERRUPT_CLEAR	0x0C
  #define S6_I2S_INTERRUPT_SET	0x10
  #define S6_I2S_MODE		0x20
  #define   S6_I2S_DUAL		0
  #define   S6_I2S_WIDE		1
  #define S6_I2S_TX_DEFAULT	0x24
  #define S6_I2S_DATA_CFG(c)	(0x40 + 0x10 * (c))
  #define   S6_I2S_IN		0
  #define   S6_I2S_OUT		1
  #define   S6_I2S_UNUSED		2
  #define S6_I2S_INTERFACE_CFG(c)	(0x44 + 0x10 * (c))
  #define   S6_I2S_DIV_MASK	0x001fff
  #define   S6_I2S_16BIT		0x000000
  #define   S6_I2S_20BIT		0x002000
  #define   S6_I2S_24BIT		0x004000
  #define   S6_I2S_32BIT		0x006000
  #define   S6_I2S_BITS_MASK	0x006000
  #define   S6_I2S_MEM_16BIT	0x000000
  #define   S6_I2S_MEM_32BIT	0x008000
  #define   S6_I2S_MEM_MASK	0x008000
  #define   S6_I2S_CHANNELS_SHIFT	16
  #define   S6_I2S_CHANNELS_MASK	0x030000
  #define   S6_I2S_SCK_IN		0x000000
  #define   S6_I2S_SCK_OUT	0x040000
  #define   S6_I2S_SCK_DIR	0x040000
  #define   S6_I2S_WS_IN		0x000000
  #define   S6_I2S_WS_OUT		0x080000
  #define   S6_I2S_WS_DIR		0x080000
  #define   S6_I2S_LEFT_FIRST	0x000000
  #define   S6_I2S_RIGHT_FIRST	0x100000
  #define   S6_I2S_FIRST		0x100000
  #define   S6_I2S_CUR_SCK	0x200000
  #define   S6_I2S_CUR_WS		0x400000
  #define S6_I2S_ENABLE(c)	(0x48 + 0x10 * (c))
  #define   S6_I2S_DISABLE_IF	0x02
  #define   S6_I2S_ENABLE_IF	0x03
  #define   S6_I2S_IS_BUSY	0x04
  #define   S6_I2S_DMA_ACTIVE	0x08
  #define   S6_I2S_IS_ENABLED	0x10
  
  #define S6_I2S_NUM_LINES	4
  
  #define S6_I2S_SIF_PORT0	0x0000000
  #define S6_I2S_SIF_PORT1	0x0000080 /* docs say 0x0000010 */
  
  static inline void s6_i2s_write_reg(struct s6000_i2s_dev *dev, int reg, u32 val)
  {
  	writel(val, dev->scbbase + reg);
  }
  
  static inline u32 s6_i2s_read_reg(struct s6000_i2s_dev *dev, int reg)
  {
  	return readl(dev->scbbase + reg);
  }
  
  static inline void s6_i2s_mod_reg(struct s6000_i2s_dev *dev, int reg,
  				  u32 mask, u32 val)
  {
  	val ^= s6_i2s_read_reg(dev, reg) & ~mask;
  	s6_i2s_write_reg(dev, reg, val);
  }
  
  static void s6000_i2s_start_channel(struct s6000_i2s_dev *dev, int channel)
  {
  	int i, j, cur, prev;
  
  	/*
  	 * Wait for WCLK to toggle 5 times before enabling the channel
  	 * s6000 Family Datasheet 3.6.4:
  	 *   "At least two cycles of WS must occur between commands
  	 *    to disable or enable the interface"
  	 */
  	j = 0;
  	prev = ~S6_I2S_CUR_WS;
  	for (i = 1000000; --i && j < 6; ) {
  		cur = s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(channel))
  		       & S6_I2S_CUR_WS;
  		if (prev != cur) {
  			prev = cur;
  			j++;
  		}
  	}
  	if (j < 6)
  		printk(KERN_WARNING "s6000-i2s: timeout waiting for WCLK
  ");
  
  	s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_ENABLE_IF);
  }
  
  static void s6000_i2s_stop_channel(struct s6000_i2s_dev *dev, int channel)
  {
  	s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_DISABLE_IF);
  }
  
  static void s6000_i2s_start(struct snd_pcm_substream *substream)
  {
  	struct snd_soc_pcm_runtime *rtd = substream->private_data;
  	struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
  	int channel;
  
  	channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  			dev->channel_out : dev->channel_in;
  
  	s6000_i2s_start_channel(dev, channel);
  }
  
  static void s6000_i2s_stop(struct snd_pcm_substream *substream)
  {
  	struct snd_soc_pcm_runtime *rtd = substream->private_data;
  	struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
  	int channel;
  
  	channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  			dev->channel_out : dev->channel_in;
  
  	s6000_i2s_stop_channel(dev, channel);
  }
  
  static int s6000_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
  			     int after)
  {
  	switch (cmd) {
  	case SNDRV_PCM_TRIGGER_START:
  	case SNDRV_PCM_TRIGGER_RESUME:
  	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
  		if ((substream->stream == SNDRV_PCM_STREAM_CAPTURE) ^ !after)
  			s6000_i2s_start(substream);
  		break;
  	case SNDRV_PCM_TRIGGER_STOP:
  	case SNDRV_PCM_TRIGGER_SUSPEND:
  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
  		if (!after)
  			s6000_i2s_stop(substream);
  	}
  	return 0;
  }
  
  static unsigned int s6000_i2s_int_sources(struct s6000_i2s_dev *dev)
  {
  	unsigned int pending;
  	pending = s6_i2s_read_reg(dev, S6_I2S_INTERRUPT_RAW);
  	pending &= S6_I2S_INT_ALIGNMENT |
  		   S6_I2S_INT_UNDERRUN |
  		   S6_I2S_INT_OVERRUN;
  	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR, pending);
  
  	return pending;
  }
  
  static unsigned int s6000_i2s_check_xrun(struct snd_soc_dai *cpu_dai)
  {
  	struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
  	unsigned int errors;
  	unsigned int ret;
  
  	errors = s6000_i2s_int_sources(dev);
  	if (likely(!errors))
  		return 0;
  
  	ret = 0;
  	if (errors & S6_I2S_INT_ALIGNMENT)
  		printk(KERN_ERR "s6000-i2s: WCLK misaligned
  ");
  	if (errors & S6_I2S_INT_UNDERRUN)
  		ret |= 1 << SNDRV_PCM_STREAM_PLAYBACK;
  	if (errors & S6_I2S_INT_OVERRUN)
  		ret |= 1 << SNDRV_PCM_STREAM_CAPTURE;
  	return ret;
  }
  
  static void s6000_i2s_wait_disabled(struct s6000_i2s_dev *dev)
  {
  	int channel;
  	int n = 50;
  	for (channel = 0; channel < 2; channel++) {
  		while (--n >= 0) {
  			int v = s6_i2s_read_reg(dev, S6_I2S_ENABLE(channel));
  			if ((v & S6_I2S_IS_ENABLED)
  			    || !(v & (S6_I2S_DMA_ACTIVE | S6_I2S_IS_BUSY)))
  				break;
  			udelay(20);
  		}
  	}
  	if (n < 0)
  		printk(KERN_WARNING "s6000-i2s: timeout disabling interfaces");
  }
  
  static int s6000_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
  				   unsigned int fmt)
  {
  	struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
  	u32 w;
  
  	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
  	case SND_SOC_DAIFMT_CBM_CFM:
  		w = S6_I2S_SCK_IN | S6_I2S_WS_IN;
  		break;
  	case SND_SOC_DAIFMT_CBS_CFM:
  		w = S6_I2S_SCK_OUT | S6_I2S_WS_IN;
  		break;
  	case SND_SOC_DAIFMT_CBM_CFS:
  		w = S6_I2S_SCK_IN | S6_I2S_WS_OUT;
  		break;
  	case SND_SOC_DAIFMT_CBS_CFS:
  		w = S6_I2S_SCK_OUT | S6_I2S_WS_OUT;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
  	case SND_SOC_DAIFMT_NB_NF:
  		w |= S6_I2S_LEFT_FIRST;
  		break;
  	case SND_SOC_DAIFMT_NB_IF:
  		w |= S6_I2S_RIGHT_FIRST;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(0),
  		       S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w);
  	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(1),
  		       S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w);
  
  	return 0;
  }
  
  static int s6000_i2s_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
  {
  	struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
  
  	if (!div || (div & 1) || div > (S6_I2S_DIV_MASK + 1) * 2)
  		return -EINVAL;
  
  	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(div_id),
  		       S6_I2S_DIV_MASK, div / 2 - 1);
  	return 0;
  }
  
  static int s6000_i2s_hw_params(struct snd_pcm_substream *substream,
  			       struct snd_pcm_hw_params *params,
  			       struct snd_soc_dai *dai)
  {
  	struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
  	int interf;
  	u32 w = 0;
  
  	if (dev->wide)
  		interf = 0;
  	else {
  		w |= (((params_channels(params) - 2) / 2)
  		      << S6_I2S_CHANNELS_SHIFT) & S6_I2S_CHANNELS_MASK;
  		interf = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  				? dev->channel_out : dev->channel_in;
  	}
  
  	switch (params_format(params)) {
  	case SNDRV_PCM_FORMAT_S16_LE:
  		w |= S6_I2S_16BIT | S6_I2S_MEM_16BIT;
  		break;
  	case SNDRV_PCM_FORMAT_S32_LE:
  		w |= S6_I2S_32BIT | S6_I2S_MEM_32BIT;
  		break;
  	default:
  		printk(KERN_WARNING "s6000-i2s: unsupported PCM format %x
  ",
  		       params_format(params));
  		return -EINVAL;
  	}
  
  	if (s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(interf))
  	     & S6_I2S_IS_ENABLED) {
  		printk(KERN_ERR "s6000-i2s: interface already enabled
  ");
  		return -EBUSY;
  	}
  
  	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(interf),
  		       S6_I2S_CHANNELS_MASK|S6_I2S_MEM_MASK|S6_I2S_BITS_MASK,
  		       w);
  
  	return 0;
  }
  
  static int s6000_i2s_dai_probe(struct snd_soc_dai *dai)
  {
  	struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
  	struct s6000_snd_platform_data *pdata = dai->dev->platform_data;
  
  	if (!pdata)
  		return -EINVAL;
  
  	dai->capture_dma_data = &dev->dma_params;
  	dai->playback_dma_data = &dev->dma_params;
  
  	dev->wide = pdata->wide;
  	dev->channel_in = pdata->channel_in;
  	dev->channel_out = pdata->channel_out;
  	dev->lines_in = pdata->lines_in;
  	dev->lines_out = pdata->lines_out;
  
  	s6_i2s_write_reg(dev, S6_I2S_MODE,
  			 dev->wide ? S6_I2S_WIDE : S6_I2S_DUAL);
  
  	if (dev->wide) {
  		int i;
  
  		if (dev->lines_in + dev->lines_out > S6_I2S_NUM_LINES)
  			return -EINVAL;
  
  		dev->channel_in = 0;
  		dev->channel_out = 1;
  		dai->driver->capture.channels_min = 2 * dev->lines_in;
  		dai->driver->capture.channels_max = dai->driver->capture.channels_min;
  		dai->driver->playback.channels_min = 2 * dev->lines_out;
  		dai->driver->playback.channels_max = dai->driver->playback.channels_min;
  
  		for (i = 0; i < dev->lines_out; i++)
  			s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_OUT);
  
  		for (; i < S6_I2S_NUM_LINES - dev->lines_in; i++)
  			s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i),
  					 S6_I2S_UNUSED);
  
  		for (; i < S6_I2S_NUM_LINES; i++)
  			s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_IN);
  	} else {
  		unsigned int cfg[2] = {S6_I2S_UNUSED, S6_I2S_UNUSED};
  
  		if (dev->lines_in > 1 || dev->lines_out > 1)
  			return -EINVAL;
  
  		dai->driver->capture.channels_min = 2 * dev->lines_in;
  		dai->driver->capture.channels_max = 8 * dev->lines_in;
  		dai->driver->playback.channels_min = 2 * dev->lines_out;
  		dai->driver->playback.channels_max = 8 * dev->lines_out;
  
  		if (dev->lines_in)
  			cfg[dev->channel_in] = S6_I2S_IN;
  		if (dev->lines_out)
  			cfg[dev->channel_out] = S6_I2S_OUT;
  
  		s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(0), cfg[0]);
  		s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(1), cfg[1]);
  	}
  
  	if (dev->lines_out) {
  		if (dev->lines_in) {
  			if (!dev->dma_params.dma_out)
  				return -ENODEV;
  		} else {
  			dev->dma_params.dma_out = dev->dma_params.dma_in;
  			dev->dma_params.dma_in = 0;
  		}
  	}
  	dev->dma_params.sif_in = dev->sifbase + (dev->channel_in ?
  					S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0);
  	dev->dma_params.sif_out = dev->sifbase + (dev->channel_out ?
  					S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0);
  	dev->dma_params.same_rate = pdata->same_rate | pdata->wide;
  	return 0;
  }
  
  #define S6000_I2S_RATES SNDRV_PCM_RATE_CONTINUOUS
  #define S6000_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
  
  static const struct snd_soc_dai_ops s6000_i2s_dai_ops = {
  	.set_fmt = s6000_i2s_set_dai_fmt,
  	.set_clkdiv = s6000_i2s_set_clkdiv,
  	.hw_params = s6000_i2s_hw_params,
  };
  
  static struct snd_soc_dai_driver s6000_i2s_dai = {
  	.probe = s6000_i2s_dai_probe,
  	.playback = {
  		.channels_min = 2,
  		.channels_max = 8,
  		.formats = S6000_I2S_FORMATS,
  		.rates = S6000_I2S_RATES,
  		.rate_min = 0,
  		.rate_max = 1562500,
  	},
  	.capture = {
  		.channels_min = 2,
  		.channels_max = 8,
  		.formats = S6000_I2S_FORMATS,
  		.rates = S6000_I2S_RATES,
  		.rate_min = 0,
  		.rate_max = 1562500,
  	},
  	.ops = &s6000_i2s_dai_ops,
  };
  
  static const struct snd_soc_component_driver s6000_i2s_component = {
  	.name		= "s6000-i2s",
  };
  
  static int s6000_i2s_probe(struct platform_device *pdev)
  {
  	struct s6000_i2s_dev *dev;
  	struct resource *scbmem, *sifmem, *region, *dma1, *dma2;
  	u8 __iomem *mmio;
  	int ret;
  
  	scbmem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	if (!scbmem) {
  		dev_err(&pdev->dev, "no mem resource?
  ");
  		ret = -ENODEV;
  		goto err_release_none;
  	}
  
  	region = request_mem_region(scbmem->start, resource_size(scbmem),
  								pdev->name);
  	if (!region) {
  		dev_err(&pdev->dev, "I2S SCB region already claimed
  ");
  		ret = -EBUSY;
  		goto err_release_none;
  	}
  
  	mmio = ioremap(scbmem->start, resource_size(scbmem));
  	if (!mmio) {
  		dev_err(&pdev->dev, "can't ioremap SCB region
  ");
  		ret = -ENOMEM;
  		goto err_release_scb;
  	}
  
  	sifmem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
  	if (!sifmem) {
  		dev_err(&pdev->dev, "no second mem resource?
  ");
  		ret = -ENODEV;
  		goto err_release_map;
  	}
  
  	region = request_mem_region(sifmem->start, resource_size(sifmem),
  								pdev->name);
  	if (!region) {
  		dev_err(&pdev->dev, "I2S SIF region already claimed
  ");
  		ret = -EBUSY;
  		goto err_release_map;
  	}
  
  	dma1 = platform_get_resource(pdev, IORESOURCE_DMA, 0);
  	if (!dma1) {
  		dev_err(&pdev->dev, "no dma resource?
  ");
  		ret = -ENODEV;
  		goto err_release_sif;
  	}
  
  	region = request_mem_region(dma1->start, resource_size(dma1),
  								pdev->name);
  	if (!region) {
  		dev_err(&pdev->dev, "I2S DMA region already claimed
  ");
  		ret = -EBUSY;
  		goto err_release_sif;
  	}
  
  	dma2 = platform_get_resource(pdev, IORESOURCE_DMA, 1);
  	if (dma2) {
  		region = request_mem_region(dma2->start, resource_size(dma2),
  								pdev->name);
  		if (!region) {
  			dev_err(&pdev->dev,
  				"I2S DMA region already claimed
  ");
  			ret = -EBUSY;
  			goto err_release_dma1;
  		}
  	}
  
  	dev = kzalloc(sizeof(struct s6000_i2s_dev), GFP_KERNEL);
  	if (!dev) {
  		ret = -ENOMEM;
  		goto err_release_dma2;
  	}
  	dev_set_drvdata(&pdev->dev, dev);
  
  	dev->sifbase = sifmem->start;
  	dev->scbbase = mmio;
  
  	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0);
  	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR,
  			 S6_I2S_INT_ALIGNMENT |
  			 S6_I2S_INT_UNDERRUN |
  			 S6_I2S_INT_OVERRUN);
  
  	s6000_i2s_stop_channel(dev, 0);
  	s6000_i2s_stop_channel(dev, 1);
  	s6000_i2s_wait_disabled(dev);
  
  	dev->dma_params.check_xrun = s6000_i2s_check_xrun;
  	dev->dma_params.trigger = s6000_i2s_trigger;
  	dev->dma_params.dma_in = dma1->start;
  	dev->dma_params.dma_out = dma2 ? dma2->start : 0;
  	dev->dma_params.irq = platform_get_irq(pdev, 0);
  	if (dev->dma_params.irq < 0) {
  		dev_err(&pdev->dev, "no irq resource?
  ");
  		ret = -ENODEV;
  		goto err_release_dev;
  	}
  
  	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE,
  			 S6_I2S_INT_ALIGNMENT |
  			 S6_I2S_INT_UNDERRUN |
  			 S6_I2S_INT_OVERRUN);
  
  	ret = snd_soc_register_component(&pdev->dev, &s6000_i2s_component,
  					 &s6000_i2s_dai, 1);
  	if (ret)
  		goto err_release_dev;
  
  	return 0;
  
  err_release_dev:
  	kfree(dev);
  err_release_dma2:
  	if (dma2)
  		release_mem_region(dma2->start, resource_size(dma2));
  err_release_dma1:
  	release_mem_region(dma1->start, resource_size(dma1));
  err_release_sif:
  	release_mem_region(sifmem->start, resource_size(sifmem));
  err_release_map:
  	iounmap(mmio);
  err_release_scb:
  	release_mem_region(scbmem->start, resource_size(scbmem));
  err_release_none:
  	return ret;
  }
  
  static void s6000_i2s_remove(struct platform_device *pdev)
  {
  	struct s6000_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
  	struct resource *region;
  	void __iomem *mmio = dev->scbbase;
  
  	snd_soc_unregister_component(&pdev->dev);
  
  	s6000_i2s_stop_channel(dev, 0);
  	s6000_i2s_stop_channel(dev, 1);
  
  	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0);
  	kfree(dev);
  
  	region = platform_get_resource(pdev, IORESOURCE_DMA, 0);
  	release_mem_region(region->start, resource_size(region));
  
  	region = platform_get_resource(pdev, IORESOURCE_DMA, 1);
  	if (region)
  		release_mem_region(region->start, resource_size(region));
  
  	region = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	release_mem_region(region->start, resource_size(region));
  
  	iounmap(mmio);
  	region = platform_get_resource(pdev, IORESOURCE_IO, 0);
  	release_mem_region(region->start, resource_size(region));
  }
  
  static struct platform_driver s6000_i2s_driver = {
  	.probe  = s6000_i2s_probe,
  	.remove = s6000_i2s_remove,
  	.driver = {
  		.name   = "s6000-i2s",
  		.owner  = THIS_MODULE,
  	},
  };
  
  module_platform_driver(s6000_i2s_driver);
  
  MODULE_AUTHOR("Daniel Gloeckner");
  MODULE_DESCRIPTION("Stretch s6000 family I2S SoC Interface");
  MODULE_LICENSE("GPL");