// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   *  The driver for the ForteMedia FM801 based soundcards

   *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>

   */

  #include <linux/delay.h>
  #include <linux/init.h>
  #include <linux/interrupt.h>

  #include <linux/io.h>

  #include <linux/pci.h>
  #include <linux/slab.h>

  #include <linux/module.h>

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

  #include <sound/tlv.h>

  #include <sound/ac97_codec.h>
  #include <sound/mpu401.h>
  #include <sound/opl3.h>
  #include <sound/initval.h>

  #ifdef CONFIG_SND_FM801_TEA575X_BOOL

  #include <media/drv-intf/tea575x.h>

  #endif

  MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");

  MODULE_DESCRIPTION("ForteMedia FM801");
  MODULE_LICENSE("GPL");
  MODULE_SUPPORTED_DEVICE("{{ForteMedia,FM801},"
  		"{Genius,SoundMaker Live 5.1}}");
  
  static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
  static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */

  static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */

  /*
   *  Enable TEA575x tuner
   *    1 = MediaForte 256-PCS

   *    2 = MediaForte 256-PCP

   *    3 = MediaForte 64-PCR

   *   16 = setup tuner only (this is additional bit), i.e. SF64-PCR FM card

   *  High 16-bits are video (radio) device number + 1
   */

  static int tea575x_tuner[SNDRV_CARDS];

  static int radio_nr[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};

  
  module_param_array(index, int, NULL, 0444);
  MODULE_PARM_DESC(index, "Index value for the FM801 soundcard.");
  module_param_array(id, charp, NULL, 0444);
  MODULE_PARM_DESC(id, "ID string for the FM801 soundcard.");
  module_param_array(enable, bool, NULL, 0444);
  MODULE_PARM_DESC(enable, "Enable FM801 soundcard.");
  module_param_array(tea575x_tuner, int, NULL, 0444);

  MODULE_PARM_DESC(tea575x_tuner, "TEA575x tuner access method (0 = auto, 1 = SF256-PCS, 2=SF256-PCP, 3=SF64-PCR, 8=disable, +16=tuner-only).");

  module_param_array(radio_nr, int, NULL, 0444);
  MODULE_PARM_DESC(radio_nr, "Radio device numbers");

  #define TUNER_DISABLED		(1<<3)

  #define TUNER_ONLY		(1<<4)
  #define TUNER_TYPE_MASK		(~TUNER_ONLY & 0xFFFF)

  
  /*
   *  Direct registers
   */

  #define fm801_writew(chip,reg,value)	outw((value), chip->port + FM801_##reg)
  #define fm801_readw(chip,reg)		inw(chip->port + FM801_##reg)
  
  #define fm801_writel(chip,reg,value)	outl((value), chip->port + FM801_##reg)

  
  #define FM801_PCM_VOL		0x00	/* PCM Output Volume */
  #define FM801_FM_VOL		0x02	/* FM Output Volume */
  #define FM801_I2S_VOL		0x04	/* I2S Volume */
  #define FM801_REC_SRC		0x06	/* Record Source */
  #define FM801_PLY_CTRL		0x08	/* Playback Control */
  #define FM801_PLY_COUNT		0x0a	/* Playback Count */
  #define FM801_PLY_BUF1		0x0c	/* Playback Bufer I */
  #define FM801_PLY_BUF2		0x10	/* Playback Buffer II */
  #define FM801_CAP_CTRL		0x14	/* Capture Control */
  #define FM801_CAP_COUNT		0x16	/* Capture Count */
  #define FM801_CAP_BUF1		0x18	/* Capture Buffer I */
  #define FM801_CAP_BUF2		0x1c	/* Capture Buffer II */
  #define FM801_CODEC_CTRL	0x22	/* Codec Control */
  #define FM801_I2S_MODE		0x24	/* I2S Mode Control */
  #define FM801_VOLUME		0x26	/* Volume Up/Down/Mute Status */
  #define FM801_I2C_CTRL		0x29	/* I2C Control */
  #define FM801_AC97_CMD		0x2a	/* AC'97 Command */
  #define FM801_AC97_DATA		0x2c	/* AC'97 Data */
  #define FM801_MPU401_DATA	0x30	/* MPU401 Data */
  #define FM801_MPU401_CMD	0x31	/* MPU401 Command */
  #define FM801_GPIO_CTRL		0x52	/* General Purpose I/O Control */
  #define FM801_GEN_CTRL		0x54	/* General Control */
  #define FM801_IRQ_MASK		0x56	/* Interrupt Mask */
  #define FM801_IRQ_STATUS	0x5a	/* Interrupt Status */
  #define FM801_OPL3_BANK0	0x68	/* OPL3 Status Read / Bank 0 Write */
  #define FM801_OPL3_DATA0	0x69	/* OPL3 Data 0 Write */
  #define FM801_OPL3_BANK1	0x6a	/* OPL3 Bank 1 Write */
  #define FM801_OPL3_DATA1	0x6b	/* OPL3 Bank 1 Write */
  #define FM801_POWERDOWN		0x70	/* Blocks Power Down Control */

  /* codec access */
  #define FM801_AC97_READ		(1<<7)	/* read=1, write=0 */
  #define FM801_AC97_VALID	(1<<8)	/* port valid=1 */
  #define FM801_AC97_BUSY		(1<<9)	/* busy=1 */
  #define FM801_AC97_ADDR_SHIFT	10	/* codec id (2bit) */

  
  /* playback and record control register bits */
  #define FM801_BUF1_LAST		(1<<1)
  #define FM801_BUF2_LAST		(1<<2)
  #define FM801_START		(1<<5)
  #define FM801_PAUSE		(1<<6)
  #define FM801_IMMED_STOP	(1<<7)
  #define FM801_RATE_SHIFT	8
  #define FM801_RATE_MASK		(15 << FM801_RATE_SHIFT)
  #define FM801_CHANNELS_4	(1<<12)	/* playback only */
  #define FM801_CHANNELS_6	(2<<12)	/* playback only */
  #define FM801_CHANNELS_6MS	(3<<12)	/* playback only */
  #define FM801_CHANNELS_MASK	(3<<12)
  #define FM801_16BIT		(1<<14)
  #define FM801_STEREO		(1<<15)
  
  /* IRQ status bits */
  #define FM801_IRQ_PLAYBACK	(1<<8)
  #define FM801_IRQ_CAPTURE	(1<<9)
  #define FM801_IRQ_VOLUME	(1<<14)
  #define FM801_IRQ_MPU		(1<<15)
  
  /* GPIO control register */
  #define FM801_GPIO_GP0		(1<<0)	/* read/write */
  #define FM801_GPIO_GP1		(1<<1)
  #define FM801_GPIO_GP2		(1<<2)
  #define FM801_GPIO_GP3		(1<<3)
  #define FM801_GPIO_GP(x)	(1<<(0+(x)))
  #define FM801_GPIO_GD0		(1<<8)	/* directions: 1 = input, 0 = output*/
  #define FM801_GPIO_GD1		(1<<9)
  #define FM801_GPIO_GD2		(1<<10)
  #define FM801_GPIO_GD3		(1<<11)
  #define FM801_GPIO_GD(x)	(1<<(8+(x)))
  #define FM801_GPIO_GS0		(1<<12)	/* function select: */
  #define FM801_GPIO_GS1		(1<<13)	/*    1 = GPIO */
  #define FM801_GPIO_GS2		(1<<14)	/*    0 = other (S/PDIF, VOL) */
  #define FM801_GPIO_GS3		(1<<15)
  #define FM801_GPIO_GS(x)	(1<<(12+(x)))
  	

  /**
   * struct fm801 - describes FM801 chip

   * @dev:		device for this chio
   * @irq:		irq number

   * @port:		I/O port number
   * @multichannel:	multichannel support
   * @secondary:		secondary codec
   * @secondary_addr:	address of the secondary codec
   * @tea575x_tuner:	tuner access method & flags
   * @ply_ctrl:		playback control
   * @cap_ctrl:		capture control

   * @ply_buffer:		playback buffer
   * @ply_buf:		playback buffer index
   * @ply_count:		playback buffer count
   * @ply_size:		playback buffer size
   * @ply_pos:		playback position
   * @cap_buffer:		capture buffer
   * @cap_buf:		capture buffer index
   * @cap_count:		capture buffer count
   * @cap_size:		capture buffer size
   * @cap_pos:		capture position
   * @ac97_bus:		ac97 bus handle
   * @ac97:		ac97 handle
   * @ac97_sec:		ac97 secondary handle
   * @card:		ALSA card
   * @pcm:		PCM devices
   * @rmidi:		rmidi device
   * @playback_substream:	substream for playback
   * @capture_substream:	substream for capture
   * @p_dma_size:		playback DMA size
   * @c_dma_size:		capture DMA size
   * @reg_lock:		lock
   * @proc_entry:		/proc entry
   * @v4l2_dev:		v4l2 device
   * @tea:		tea575a structure
   * @saved_regs:		context saved during suspend

   */

  struct fm801 {

  	struct device *dev;

  	int irq;

  	unsigned long port;
  	unsigned int multichannel: 1,
  		     secondary: 1;
  	unsigned char secondary_addr;
  	unsigned int tea575x_tuner;

  	unsigned short ply_ctrl;
  	unsigned short cap_ctrl;

  
  	unsigned long ply_buffer;
  	unsigned int ply_buf;
  	unsigned int ply_count;
  	unsigned int ply_size;
  	unsigned int ply_pos;
  
  	unsigned long cap_buffer;
  	unsigned int cap_buf;
  	unsigned int cap_count;
  	unsigned int cap_size;
  	unsigned int cap_pos;

  	struct snd_ac97_bus *ac97_bus;
  	struct snd_ac97 *ac97;
  	struct snd_ac97 *ac97_sec;

  	struct snd_card *card;
  	struct snd_pcm *pcm;
  	struct snd_rawmidi *rmidi;
  	struct snd_pcm_substream *playback_substream;
  	struct snd_pcm_substream *capture_substream;

  	unsigned int p_dma_size;
  	unsigned int c_dma_size;
  
  	spinlock_t reg_lock;

  	struct snd_info_entry *proc_entry;

  #ifdef CONFIG_SND_FM801_TEA575X_BOOL

  	struct v4l2_device v4l2_dev;

  	struct snd_tea575x tea;

  #endif

  #ifdef CONFIG_PM_SLEEP

  	u16 saved_regs[0x20];
  #endif

  };

  /*
   * IO accessors
   */
  
  static inline void fm801_iowrite16(struct fm801 *chip, unsigned short offset, u16 value)
  {
  	outw(value, chip->port + offset);
  }
  
  static inline u16 fm801_ioread16(struct fm801 *chip, unsigned short offset)
  {
  	return inw(chip->port + offset);
  }

  static const struct pci_device_id snd_fm801_ids[] = {

  	{ 0x1319, 0x0801, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0, },   /* FM801 */

  	{ 0x5213, 0x0510, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0, },   /* Gallant Odyssey Sound 4 */

  	{ 0, }
  };
  
  MODULE_DEVICE_TABLE(pci, snd_fm801_ids);
  
  /*
   *  common I/O routines
   */

  static bool fm801_ac97_is_ready(struct fm801 *chip, unsigned int iterations)
  {
  	unsigned int idx;
  
  	for (idx = 0; idx < iterations; idx++) {
  		if (!(fm801_readw(chip, AC97_CMD) & FM801_AC97_BUSY))
  			return true;
  		udelay(10);
  	}
  	return false;
  }
  
  static bool fm801_ac97_is_valid(struct fm801 *chip, unsigned int iterations)
  {
  	unsigned int idx;
  
  	for (idx = 0; idx < iterations; idx++) {
  		if (fm801_readw(chip, AC97_CMD) & FM801_AC97_VALID)
  			return true;
  		udelay(10);
  	}
  	return false;
  }

  static int snd_fm801_update_bits(struct fm801 *chip, unsigned short reg,

  				 unsigned short mask, unsigned short value)
  {
  	int change;
  	unsigned long flags;
  	unsigned short old, new;
  
  	spin_lock_irqsave(&chip->reg_lock, flags);

  	old = fm801_ioread16(chip, reg);

  	new = (old & ~mask) | value;
  	change = old != new;
  	if (change)

  		fm801_iowrite16(chip, reg, new);

  	spin_unlock_irqrestore(&chip->reg_lock, flags);
  	return change;
  }

  static void snd_fm801_codec_write(struct snd_ac97 *ac97,

  				  unsigned short reg,
  				  unsigned short val)
  {

  	struct fm801 *chip = ac97->private_data;

  
  	/*
  	 *  Wait until the codec interface is not ready..
  	 */

  	if (!fm801_ac97_is_ready(chip, 100)) {
  		dev_err(chip->card->dev, "AC'97 interface is busy (1)
  ");
  		return;

  	}

  	/* write data and address */

  	fm801_writew(chip, AC97_DATA, val);
  	fm801_writew(chip, AC97_CMD, reg | (ac97->addr << FM801_AC97_ADDR_SHIFT));

  	/*
  	 *  Wait until the write command is not completed..

  	 */
  	if (!fm801_ac97_is_ready(chip, 1000))
  		dev_err(chip->card->dev, "AC'97 interface #%d is busy (2)
  ",
  		ac97->num);

  }

  static unsigned short snd_fm801_codec_read(struct snd_ac97 *ac97, unsigned short reg)

  {

  	struct fm801 *chip = ac97->private_data;

  
  	/*
  	 *  Wait until the codec interface is not ready..
  	 */

  	if (!fm801_ac97_is_ready(chip, 100)) {
  		dev_err(chip->card->dev, "AC'97 interface is busy (1)
  ");
  		return 0;

  	}

  	/* read command */

  	fm801_writew(chip, AC97_CMD,
  		     reg | (ac97->addr << FM801_AC97_ADDR_SHIFT) | FM801_AC97_READ);

  	if (!fm801_ac97_is_ready(chip, 100)) {
  		dev_err(chip->card->dev, "AC'97 interface #%d is busy (2)
  ",
  			ac97->num);
  		return 0;

  	}

  	if (!fm801_ac97_is_valid(chip, 1000)) {
  		dev_err(chip->card->dev,
  			"AC'97 interface #%d is not valid (2)
  ", ac97->num);
  		return 0;

  	}

  	return fm801_readw(chip, AC97_DATA);

  }

  static const unsigned int rates[] = {

    5500,  8000,  9600, 11025,
    16000, 19200, 22050, 32000,
    38400, 44100, 48000
  };

  static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {

  	.count = ARRAY_SIZE(rates),
  	.list = rates,
  	.mask = 0,
  };

  static const unsigned int channels[] = {

    2, 4, 6
  };

  static const struct snd_pcm_hw_constraint_list hw_constraints_channels = {

  	.count = ARRAY_SIZE(channels),

  	.list = channels,
  	.mask = 0,
  };
  
  /*
   *  Sample rate routines
   */
  
  static unsigned short snd_fm801_rate_bits(unsigned int rate)
  {
  	unsigned int idx;
  
  	for (idx = 0; idx < ARRAY_SIZE(rates); idx++)
  		if (rates[idx] == rate)
  			return idx;
  	snd_BUG();
  	return ARRAY_SIZE(rates) - 1;
  }
  
  /*
   *  PCM part
   */

  static int snd_fm801_playback_trigger(struct snd_pcm_substream *substream,

  				      int cmd)
  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);

  
  	spin_lock(&chip->reg_lock);
  	switch (cmd) {
  	case SNDRV_PCM_TRIGGER_START:
  		chip->ply_ctrl &= ~(FM801_BUF1_LAST |
  				     FM801_BUF2_LAST |
  				     FM801_PAUSE);
  		chip->ply_ctrl |= FM801_START |
  				   FM801_IMMED_STOP;
  		break;
  	case SNDRV_PCM_TRIGGER_STOP:
  		chip->ply_ctrl &= ~(FM801_START | FM801_PAUSE);
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

  	case SNDRV_PCM_TRIGGER_SUSPEND:

  		chip->ply_ctrl |= FM801_PAUSE;
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

  	case SNDRV_PCM_TRIGGER_RESUME:

  		chip->ply_ctrl &= ~FM801_PAUSE;
  		break;
  	default:
  		spin_unlock(&chip->reg_lock);
  		snd_BUG();
  		return -EINVAL;
  	}

  	fm801_writew(chip, PLY_CTRL, chip->ply_ctrl);

  	spin_unlock(&chip->reg_lock);
  	return 0;
  }

  static int snd_fm801_capture_trigger(struct snd_pcm_substream *substream,

  				     int cmd)
  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);

  
  	spin_lock(&chip->reg_lock);
  	switch (cmd) {
  	case SNDRV_PCM_TRIGGER_START:
  		chip->cap_ctrl &= ~(FM801_BUF1_LAST |
  				     FM801_BUF2_LAST |
  				     FM801_PAUSE);
  		chip->cap_ctrl |= FM801_START |
  				   FM801_IMMED_STOP;
  		break;
  	case SNDRV_PCM_TRIGGER_STOP:
  		chip->cap_ctrl &= ~(FM801_START | FM801_PAUSE);
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

  	case SNDRV_PCM_TRIGGER_SUSPEND:

  		chip->cap_ctrl |= FM801_PAUSE;
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

  	case SNDRV_PCM_TRIGGER_RESUME:

  		chip->cap_ctrl &= ~FM801_PAUSE;
  		break;
  	default:
  		spin_unlock(&chip->reg_lock);
  		snd_BUG();
  		return -EINVAL;
  	}

  	fm801_writew(chip, CAP_CTRL, chip->cap_ctrl);

  	spin_unlock(&chip->reg_lock);
  	return 0;
  }

  static int snd_fm801_playback_prepare(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  
  	chip->ply_size = snd_pcm_lib_buffer_bytes(substream);
  	chip->ply_count = snd_pcm_lib_period_bytes(substream);
  	spin_lock_irq(&chip->reg_lock);
  	chip->ply_ctrl &= ~(FM801_START | FM801_16BIT |
  			     FM801_STEREO | FM801_RATE_MASK |
  			     FM801_CHANNELS_MASK);
  	if (snd_pcm_format_width(runtime->format) == 16)
  		chip->ply_ctrl |= FM801_16BIT;
  	if (runtime->channels > 1) {
  		chip->ply_ctrl |= FM801_STEREO;
  		if (runtime->channels == 4)
  			chip->ply_ctrl |= FM801_CHANNELS_4;
  		else if (runtime->channels == 6)
  			chip->ply_ctrl |= FM801_CHANNELS_6;
  	}
  	chip->ply_ctrl |= snd_fm801_rate_bits(runtime->rate) << FM801_RATE_SHIFT;
  	chip->ply_buf = 0;

  	fm801_writew(chip, PLY_CTRL, chip->ply_ctrl);
  	fm801_writew(chip, PLY_COUNT, chip->ply_count - 1);

  	chip->ply_buffer = runtime->dma_addr;
  	chip->ply_pos = 0;

  	fm801_writel(chip, PLY_BUF1, chip->ply_buffer);
  	fm801_writel(chip, PLY_BUF2,
  		     chip->ply_buffer + (chip->ply_count % chip->ply_size));

  	spin_unlock_irq(&chip->reg_lock);
  	return 0;
  }

  static int snd_fm801_capture_prepare(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  
  	chip->cap_size = snd_pcm_lib_buffer_bytes(substream);
  	chip->cap_count = snd_pcm_lib_period_bytes(substream);
  	spin_lock_irq(&chip->reg_lock);
  	chip->cap_ctrl &= ~(FM801_START | FM801_16BIT |
  			     FM801_STEREO | FM801_RATE_MASK);
  	if (snd_pcm_format_width(runtime->format) == 16)
  		chip->cap_ctrl |= FM801_16BIT;
  	if (runtime->channels > 1)
  		chip->cap_ctrl |= FM801_STEREO;
  	chip->cap_ctrl |= snd_fm801_rate_bits(runtime->rate) << FM801_RATE_SHIFT;
  	chip->cap_buf = 0;

  	fm801_writew(chip, CAP_CTRL, chip->cap_ctrl);
  	fm801_writew(chip, CAP_COUNT, chip->cap_count - 1);

  	chip->cap_buffer = runtime->dma_addr;
  	chip->cap_pos = 0;

  	fm801_writel(chip, CAP_BUF1, chip->cap_buffer);
  	fm801_writel(chip, CAP_BUF2,
  		     chip->cap_buffer + (chip->cap_count % chip->cap_size));

  	spin_unlock_irq(&chip->reg_lock);
  	return 0;
  }

  static snd_pcm_uframes_t snd_fm801_playback_pointer(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);

  	size_t ptr;
  
  	if (!(chip->ply_ctrl & FM801_START))
  		return 0;
  	spin_lock(&chip->reg_lock);

  	ptr = chip->ply_pos + (chip->ply_count - 1) - fm801_readw(chip, PLY_COUNT);
  	if (fm801_readw(chip, IRQ_STATUS) & FM801_IRQ_PLAYBACK) {

  		ptr += chip->ply_count;
  		ptr %= chip->ply_size;
  	}
  	spin_unlock(&chip->reg_lock);
  	return bytes_to_frames(substream->runtime, ptr);
  }

  static snd_pcm_uframes_t snd_fm801_capture_pointer(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);

  	size_t ptr;
  
  	if (!(chip->cap_ctrl & FM801_START))
  		return 0;
  	spin_lock(&chip->reg_lock);

  	ptr = chip->cap_pos + (chip->cap_count - 1) - fm801_readw(chip, CAP_COUNT);
  	if (fm801_readw(chip, IRQ_STATUS) & FM801_IRQ_CAPTURE) {

  		ptr += chip->cap_count;
  		ptr %= chip->cap_size;
  	}
  	spin_unlock(&chip->reg_lock);
  	return bytes_to_frames(substream->runtime, ptr);
  }

  static irqreturn_t snd_fm801_interrupt(int irq, void *dev_id)

  {

  	struct fm801 *chip = dev_id;

  	unsigned short status;
  	unsigned int tmp;

  	status = fm801_readw(chip, IRQ_STATUS);

  	status &= FM801_IRQ_PLAYBACK|FM801_IRQ_CAPTURE|FM801_IRQ_MPU|FM801_IRQ_VOLUME;
  	if (! status)
  		return IRQ_NONE;
  	/* ack first */

  	fm801_writew(chip, IRQ_STATUS, status);

  	if (chip->pcm && (status & FM801_IRQ_PLAYBACK) && chip->playback_substream) {
  		spin_lock(&chip->reg_lock);
  		chip->ply_buf++;
  		chip->ply_pos += chip->ply_count;
  		chip->ply_pos %= chip->ply_size;
  		tmp = chip->ply_pos + chip->ply_count;
  		tmp %= chip->ply_size;

  		if (chip->ply_buf & 1)
  			fm801_writel(chip, PLY_BUF1, chip->ply_buffer + tmp);
  		else
  			fm801_writel(chip, PLY_BUF2, chip->ply_buffer + tmp);

  		spin_unlock(&chip->reg_lock);
  		snd_pcm_period_elapsed(chip->playback_substream);
  	}
  	if (chip->pcm && (status & FM801_IRQ_CAPTURE) && chip->capture_substream) {
  		spin_lock(&chip->reg_lock);
  		chip->cap_buf++;
  		chip->cap_pos += chip->cap_count;
  		chip->cap_pos %= chip->cap_size;
  		tmp = chip->cap_pos + chip->cap_count;
  		tmp %= chip->cap_size;

  		if (chip->cap_buf & 1)
  			fm801_writel(chip, CAP_BUF1, chip->cap_buffer + tmp);
  		else
  			fm801_writel(chip, CAP_BUF2, chip->cap_buffer + tmp);

  		spin_unlock(&chip->reg_lock);
  		snd_pcm_period_elapsed(chip->capture_substream);
  	}
  	if (chip->rmidi && (status & FM801_IRQ_MPU))

  		snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);

  	if (status & FM801_IRQ_VOLUME) {
  		/* TODO */
  	}

  
  	return IRQ_HANDLED;
  }

  static const struct snd_pcm_hardware snd_fm801_playback =

  {
  	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
  				 SNDRV_PCM_INFO_BLOCK_TRANSFER |

  				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |

  				 SNDRV_PCM_INFO_MMAP_VALID),
  	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
  	.rates =		SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
  	.rate_min =		5500,
  	.rate_max =		48000,
  	.channels_min =		1,
  	.channels_max =		2,
  	.buffer_bytes_max =	(128*1024),
  	.period_bytes_min =	64,
  	.period_bytes_max =	(128*1024),
  	.periods_min =		1,
  	.periods_max =		1024,
  	.fifo_size =		0,
  };

  static const struct snd_pcm_hardware snd_fm801_capture =

  {
  	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
  				 SNDRV_PCM_INFO_BLOCK_TRANSFER |

  				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |

  				 SNDRV_PCM_INFO_MMAP_VALID),
  	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
  	.rates =		SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
  	.rate_min =		5500,
  	.rate_max =		48000,
  	.channels_min =		1,
  	.channels_max =		2,
  	.buffer_bytes_max =	(128*1024),
  	.period_bytes_min =	64,
  	.period_bytes_max =	(128*1024),
  	.periods_min =		1,
  	.periods_max =		1024,
  	.fifo_size =		0,
  };

  static int snd_fm801_playback_open(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  	int err;
  
  	chip->playback_substream = substream;
  	runtime->hw = snd_fm801_playback;

  	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
  				   &hw_constraints_rates);

  	if (chip->multichannel) {
  		runtime->hw.channels_max = 6;

  		snd_pcm_hw_constraint_list(runtime, 0,
  					   SNDRV_PCM_HW_PARAM_CHANNELS,
  					   &hw_constraints_channels);

  	}
  	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
  		return err;
  	return 0;
  }

  static int snd_fm801_capture_open(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  	int err;
  
  	chip->capture_substream = substream;
  	runtime->hw = snd_fm801_capture;

  	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
  				   &hw_constraints_rates);

  	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
  		return err;
  	return 0;
  }

  static int snd_fm801_playback_close(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);

  
  	chip->playback_substream = NULL;
  	return 0;
  }

  static int snd_fm801_capture_close(struct snd_pcm_substream *substream)

  {

  	struct fm801 *chip = snd_pcm_substream_chip(substream);

  
  	chip->capture_substream = NULL;
  	return 0;
  }

  static const struct snd_pcm_ops snd_fm801_playback_ops = {

  	.open =		snd_fm801_playback_open,
  	.close =	snd_fm801_playback_close,

  	.prepare =	snd_fm801_playback_prepare,
  	.trigger =	snd_fm801_playback_trigger,
  	.pointer =	snd_fm801_playback_pointer,
  };

  static const struct snd_pcm_ops snd_fm801_capture_ops = {

  	.open =		snd_fm801_capture_open,
  	.close =	snd_fm801_capture_close,

  	.prepare =	snd_fm801_capture_prepare,
  	.trigger =	snd_fm801_capture_trigger,
  	.pointer =	snd_fm801_capture_pointer,
  };

  static int snd_fm801_pcm(struct fm801 *chip, int device)

  {

  	struct pci_dev *pdev = to_pci_dev(chip->dev);

  	struct snd_pcm *pcm;

  	int err;

  	if ((err = snd_pcm_new(chip->card, "FM801", device, 1, 1, &pcm)) < 0)
  		return err;
  
  	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_fm801_playback_ops);
  	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_fm801_capture_ops);
  
  	pcm->private_data = chip;

  	pcm->info_flags = 0;
  	strcpy(pcm->name, "FM801");
  	chip->pcm = pcm;

  	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, &pdev->dev,
  				       chip->multichannel ? 128*1024 : 64*1024, 128*1024);

  	return snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,

  				     snd_pcm_alt_chmaps,
  				     chip->multichannel ? 6 : 2, 0,
  				     NULL);

  }
  
  /*
   *  TEA5757 radio
   */

  #ifdef CONFIG_SND_FM801_TEA575X_BOOL

  /* GPIO to TEA575x maps */
  struct snd_fm801_tea575x_gpio {
  	u8 data, clk, wren, most;

  	char *name;

  };

  static const struct snd_fm801_tea575x_gpio snd_fm801_tea575x_gpios[] = {

  	{ .data = 1, .clk = 3, .wren = 2, .most = 0, .name = "SF256-PCS" },
  	{ .data = 1, .clk = 0, .wren = 2, .most = 3, .name = "SF256-PCP" },
  	{ .data = 2, .clk = 0, .wren = 1, .most = 3, .name = "SF64-PCR" },

  };

  #define get_tea575x_gpio(chip) \
  	(&snd_fm801_tea575x_gpios[((chip)->tea575x_tuner & TUNER_TYPE_MASK) - 1])

  static void snd_fm801_tea575x_set_pins(struct snd_tea575x *tea, u8 pins)

  {

  	struct fm801 *chip = tea->private_data;

  	unsigned short reg = fm801_readw(chip, GPIO_CTRL);

  	struct snd_fm801_tea575x_gpio gpio = *get_tea575x_gpio(chip);

  	reg &= ~(FM801_GPIO_GP(gpio.data) |
  		 FM801_GPIO_GP(gpio.clk) |
  		 FM801_GPIO_GP(gpio.wren));

  	reg |= (pins & TEA575X_DATA) ? FM801_GPIO_GP(gpio.data) : 0;
  	reg |= (pins & TEA575X_CLK)  ? FM801_GPIO_GP(gpio.clk) : 0;
  	/* WRITE_ENABLE is inverted */
  	reg |= (pins & TEA575X_WREN) ? 0 : FM801_GPIO_GP(gpio.wren);

  	fm801_writew(chip, GPIO_CTRL, reg);

  }

  static u8 snd_fm801_tea575x_get_pins(struct snd_tea575x *tea)

  {

  	struct fm801 *chip = tea->private_data;

  	unsigned short reg = fm801_readw(chip, GPIO_CTRL);

  	struct snd_fm801_tea575x_gpio gpio = *get_tea575x_gpio(chip);

  	u8 ret;
  
  	ret = 0;
  	if (reg & FM801_GPIO_GP(gpio.data))
  		ret |= TEA575X_DATA;
  	if (reg & FM801_GPIO_GP(gpio.most))
  		ret |= TEA575X_MOST;
  	return ret;

  }

  static void snd_fm801_tea575x_set_direction(struct snd_tea575x *tea, bool output)

  {

  	struct fm801 *chip = tea->private_data;

  	unsigned short reg = fm801_readw(chip, GPIO_CTRL);

  	struct snd_fm801_tea575x_gpio gpio = *get_tea575x_gpio(chip);

  	/* use GPIO lines and set write enable bit */

  	reg |= FM801_GPIO_GS(gpio.data) |
  	       FM801_GPIO_GS(gpio.wren) |
  	       FM801_GPIO_GS(gpio.clk) |
  	       FM801_GPIO_GS(gpio.most);
  	if (output) {
  		/* all of lines are in the write direction */
  		/* clear data and clock lines */
  		reg &= ~(FM801_GPIO_GD(gpio.data) |
  			 FM801_GPIO_GD(gpio.wren) |
  			 FM801_GPIO_GD(gpio.clk) |
  			 FM801_GPIO_GP(gpio.data) |
  			 FM801_GPIO_GP(gpio.clk) |
  			 FM801_GPIO_GP(gpio.wren));
  	} else {
  		/* use GPIO lines, set data direction to input */
  		reg |= FM801_GPIO_GD(gpio.data) |
  		       FM801_GPIO_GD(gpio.most) |
  		       FM801_GPIO_GP(gpio.data) |
  		       FM801_GPIO_GP(gpio.most) |
  		       FM801_GPIO_GP(gpio.wren);
  		/* all of lines are in the write direction, except data */
  		/* clear data, write enable and clock lines */
  		reg &= ~(FM801_GPIO_GD(gpio.wren) |
  			 FM801_GPIO_GD(gpio.clk) |
  			 FM801_GPIO_GP(gpio.clk));

  	}

  	fm801_writew(chip, GPIO_CTRL, reg);

  }

  static const struct snd_tea575x_ops snd_fm801_tea_ops = {

  	.set_pins = snd_fm801_tea575x_set_pins,
  	.get_pins = snd_fm801_tea575x_get_pins,
  	.set_direction = snd_fm801_tea575x_set_direction,

  };
  #endif
  
  /*
   *  Mixer routines
   */
  
  #define FM801_SINGLE(xname, reg, shift, mask, invert) \
  { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_fm801_info_single, \
    .get = snd_fm801_get_single, .put = snd_fm801_put_single, \
    .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

  static int snd_fm801_info_single(struct snd_kcontrol *kcontrol,
  				 struct snd_ctl_elem_info *uinfo)

  {
  	int mask = (kcontrol->private_value >> 16) & 0xff;
  
  	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
  	uinfo->count = 1;
  	uinfo->value.integer.min = 0;
  	uinfo->value.integer.max = mask;
  	return 0;
  }

  static int snd_fm801_get_single(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct fm801 *chip = snd_kcontrol_chip(kcontrol);

  	int reg = kcontrol->private_value & 0xff;
  	int shift = (kcontrol->private_value >> 8) & 0xff;
  	int mask = (kcontrol->private_value >> 16) & 0xff;
  	int invert = (kcontrol->private_value >> 24) & 0xff;

  	long *value = ucontrol->value.integer.value;

  	value[0] = (fm801_ioread16(chip, reg) >> shift) & mask;

  	if (invert)

  		value[0] = mask - value[0];

  	return 0;
  }

  static int snd_fm801_put_single(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct fm801 *chip = snd_kcontrol_chip(kcontrol);

  	int reg = kcontrol->private_value & 0xff;
  	int shift = (kcontrol->private_value >> 8) & 0xff;
  	int mask = (kcontrol->private_value >> 16) & 0xff;
  	int invert = (kcontrol->private_value >> 24) & 0xff;
  	unsigned short val;
  
  	val = (ucontrol->value.integer.value[0] & mask);
  	if (invert)
  		val = mask - val;
  	return snd_fm801_update_bits(chip, reg, mask << shift, val << shift);
  }
  
  #define FM801_DOUBLE(xname, reg, shift_left, shift_right, mask, invert) \
  { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_fm801_info_double, \
    .get = snd_fm801_get_double, .put = snd_fm801_put_double, \
    .private_value = reg | (shift_left << 8) | (shift_right << 12) | (mask << 16) | (invert << 24) }

  #define FM801_DOUBLE_TLV(xname, reg, shift_left, shift_right, mask, invert, xtlv) \
  { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
    .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
    .name = xname, .info = snd_fm801_info_double, \
    .get = snd_fm801_get_double, .put = snd_fm801_put_double, \
    .private_value = reg | (shift_left << 8) | (shift_right << 12) | (mask << 16) | (invert << 24), \
    .tlv = { .p = (xtlv) } }

  static int snd_fm801_info_double(struct snd_kcontrol *kcontrol,
  				 struct snd_ctl_elem_info *uinfo)

  {
  	int mask = (kcontrol->private_value >> 16) & 0xff;
  
  	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
  	uinfo->count = 2;
  	uinfo->value.integer.min = 0;
  	uinfo->value.integer.max = mask;
  	return 0;
  }

  static int snd_fm801_get_double(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct fm801 *chip = snd_kcontrol_chip(kcontrol);

          int reg = kcontrol->private_value & 0xff;
  	int shift_left = (kcontrol->private_value >> 8) & 0x0f;
  	int shift_right = (kcontrol->private_value >> 12) & 0x0f;
  	int mask = (kcontrol->private_value >> 16) & 0xff;
  	int invert = (kcontrol->private_value >> 24) & 0xff;

  	long *value = ucontrol->value.integer.value;

  
  	spin_lock_irq(&chip->reg_lock);

  	value[0] = (fm801_ioread16(chip, reg) >> shift_left) & mask;
  	value[1] = (fm801_ioread16(chip, reg) >> shift_right) & mask;

  	spin_unlock_irq(&chip->reg_lock);
  	if (invert) {

  		value[0] = mask - value[0];
  		value[1] = mask - value[1];

  	}
  	return 0;
  }

  static int snd_fm801_put_double(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct fm801 *chip = snd_kcontrol_chip(kcontrol);

  	int reg = kcontrol->private_value & 0xff;
  	int shift_left = (kcontrol->private_value >> 8) & 0x0f;
  	int shift_right = (kcontrol->private_value >> 12) & 0x0f;
  	int mask = (kcontrol->private_value >> 16) & 0xff;
  	int invert = (kcontrol->private_value >> 24) & 0xff;
  	unsigned short val1, val2;
   
  	val1 = ucontrol->value.integer.value[0] & mask;
  	val2 = ucontrol->value.integer.value[1] & mask;
  	if (invert) {
  		val1 = mask - val1;
  		val2 = mask - val2;
  	}
  	return snd_fm801_update_bits(chip, reg,
  				     (mask << shift_left) | (mask << shift_right),
  				     (val1 << shift_left ) | (val2 << shift_right));
  }

  static int snd_fm801_info_mux(struct snd_kcontrol *kcontrol,
  			      struct snd_ctl_elem_info *uinfo)

  {

  	static const char * const texts[5] = {

  		"AC97 Primary", "FM", "I2S", "PCM", "AC97 Secondary"
  	};
   

  	return snd_ctl_enum_info(uinfo, 1, 5, texts);

  }

  static int snd_fm801_get_mux(struct snd_kcontrol *kcontrol,
  			     struct snd_ctl_elem_value *ucontrol)

  {

  	struct fm801 *chip = snd_kcontrol_chip(kcontrol);

          unsigned short val;
   

  	val = fm801_readw(chip, REC_SRC) & 7;

  	if (val > 4)
  		val = 4;
          ucontrol->value.enumerated.item[0] = val;
          return 0;
  }

  static int snd_fm801_put_mux(struct snd_kcontrol *kcontrol,
  			     struct snd_ctl_elem_value *ucontrol)

  {

  	struct fm801 *chip = snd_kcontrol_chip(kcontrol);

          unsigned short val;
   
          if ((val = ucontrol->value.enumerated.item[0]) > 4)
                  return -EINVAL;
  	return snd_fm801_update_bits(chip, FM801_REC_SRC, 7, val);
  }

  static const DECLARE_TLV_DB_SCALE(db_scale_dsp, -3450, 150, 0);

  #define FM801_CONTROLS ARRAY_SIZE(snd_fm801_controls)

  static const struct snd_kcontrol_new snd_fm801_controls[] = {

  FM801_DOUBLE_TLV("Wave Playback Volume", FM801_PCM_VOL, 0, 8, 31, 1,
  		 db_scale_dsp),

  FM801_SINGLE("Wave Playback Switch", FM801_PCM_VOL, 15, 1, 1),

  FM801_DOUBLE_TLV("I2S Playback Volume", FM801_I2S_VOL, 0, 8, 31, 1,
  		 db_scale_dsp),

  FM801_SINGLE("I2S Playback Switch", FM801_I2S_VOL, 15, 1, 1),

  FM801_DOUBLE_TLV("FM Playback Volume", FM801_FM_VOL, 0, 8, 31, 1,
  		 db_scale_dsp),

  FM801_SINGLE("FM Playback Switch", FM801_FM_VOL, 15, 1, 1),
  {
  	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	.name = "Digital Capture Source",
  	.info = snd_fm801_info_mux,
  	.get = snd_fm801_get_mux,
  	.put = snd_fm801_put_mux,
  }
  };

  #define FM801_CONTROLS_MULTI ARRAY_SIZE(snd_fm801_controls_multi)

  static const struct snd_kcontrol_new snd_fm801_controls_multi[] = {

  FM801_SINGLE("AC97 2ch->4ch Copy Switch", FM801_CODEC_CTRL, 7, 1, 0),
  FM801_SINGLE("AC97 18-bit Switch", FM801_CODEC_CTRL, 10, 1, 0),

  FM801_SINGLE(SNDRV_CTL_NAME_IEC958("",CAPTURE,SWITCH), FM801_I2S_MODE, 8, 1, 0),
  FM801_SINGLE(SNDRV_CTL_NAME_IEC958("Raw Data ",PLAYBACK,SWITCH), FM801_I2S_MODE, 9, 1, 0),
  FM801_SINGLE(SNDRV_CTL_NAME_IEC958("Raw Data ",CAPTURE,SWITCH), FM801_I2S_MODE, 10, 1, 0),
  FM801_SINGLE(SNDRV_CTL_NAME_IEC958("",PLAYBACK,SWITCH), FM801_GEN_CTRL, 2, 1, 0),

  };

  static void snd_fm801_mixer_free_ac97_bus(struct snd_ac97_bus *bus)

  {

  	struct fm801 *chip = bus->private_data;

  	chip->ac97_bus = NULL;
  }

  static void snd_fm801_mixer_free_ac97(struct snd_ac97 *ac97)

  {

  	struct fm801 *chip = ac97->private_data;

  	if (ac97->num == 0) {
  		chip->ac97 = NULL;
  	} else {
  		chip->ac97_sec = NULL;
  	}
  }

  static int snd_fm801_mixer(struct fm801 *chip)

  {

  	struct snd_ac97_template ac97;

  	unsigned int i;
  	int err;

  	static const struct snd_ac97_bus_ops ops = {

  		.write = snd_fm801_codec_write,
  		.read = snd_fm801_codec_read,
  	};
  
  	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
  		return err;
  	chip->ac97_bus->private_free = snd_fm801_mixer_free_ac97_bus;
  
  	memset(&ac97, 0, sizeof(ac97));
  	ac97.private_data = chip;
  	ac97.private_free = snd_fm801_mixer_free_ac97;
  	if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
  		return err;
  	if (chip->secondary) {
  		ac97.num = 1;
  		ac97.addr = chip->secondary_addr;
  		if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97_sec)) < 0)
  			return err;
  	}

  	for (i = 0; i < FM801_CONTROLS; i++) {
  		err = snd_ctl_add(chip->card,
  			snd_ctl_new1(&snd_fm801_controls[i], chip));
  		if (err < 0)
  			return err;
  	}

  	if (chip->multichannel) {

  		for (i = 0; i < FM801_CONTROLS_MULTI; i++) {
  			err = snd_ctl_add(chip->card,
  				snd_ctl_new1(&snd_fm801_controls_multi[i], chip));
  			if (err < 0)
  				return err;
  		}

  	}
  	return 0;
  }
  
  /*
   *  initialization routines
   */

  static int wait_for_codec(struct fm801 *chip, unsigned int codec_id,
  			  unsigned short reg, unsigned long waits)
  {
  	unsigned long timeout = jiffies + waits;

  	fm801_writew(chip, AC97_CMD,
  		     reg | (codec_id << FM801_AC97_ADDR_SHIFT) | FM801_AC97_READ);

  	udelay(5);
  	do {

  		if ((fm801_readw(chip, AC97_CMD) &
  		     (FM801_AC97_VALID | FM801_AC97_BUSY)) == FM801_AC97_VALID)

  			return 0;
  		schedule_timeout_uninterruptible(1);
  	} while (time_after(timeout, jiffies));
  	return -EIO;
  }

  static int reset_codec(struct fm801 *chip)

  {

  	/* codec cold reset + AC'97 warm reset */

  	fm801_writew(chip, CODEC_CTRL, (1 << 5) | (1 << 6));
  	fm801_readw(chip, CODEC_CTRL); /* flush posting data */

  	udelay(100);

  	fm801_writew(chip, CODEC_CTRL, 0);

  	return wait_for_codec(chip, 0, AC97_RESET, msecs_to_jiffies(750));
  }
  
  static void snd_fm801_chip_multichannel_init(struct fm801 *chip)
  {
  	unsigned short cmdw;

  
  	if (chip->multichannel) {
  		if (chip->secondary_addr) {
  			wait_for_codec(chip, chip->secondary_addr,
  				       AC97_VENDOR_ID1, msecs_to_jiffies(50));
  		} else {
  			/* my card has the secondary codec */
  			/* at address #3, so the loop is inverted */

  			int i;
  			for (i = 3; i > 0; i--) {
  				if (!wait_for_codec(chip, i, AC97_VENDOR_ID1,

  						     msecs_to_jiffies(50))) {

  					cmdw = fm801_readw(chip, AC97_DATA);

  					if (cmdw != 0xffff && cmdw != 0) {
  						chip->secondary = 1;

  						chip->secondary_addr = i;

  						break;
  					}
  				}
  			}
  		}
  
  		/* the recovery phase, it seems that probing for non-existing codec might */
  		/* cause timeout problems */
  		wait_for_codec(chip, 0, AC97_VENDOR_ID1, msecs_to_jiffies(750));
  	}

  }

  static void snd_fm801_chip_init(struct fm801 *chip)
  {
  	unsigned short cmdw;

  	/* init volume */

  	fm801_writew(chip, PCM_VOL, 0x0808);
  	fm801_writew(chip, FM_VOL, 0x9f1f);
  	fm801_writew(chip, I2S_VOL, 0x8808);

  
  	/* I2S control - I2S mode */

  	fm801_writew(chip, I2S_MODE, 0x0003);

  	/* interrupt setup */

  	cmdw = fm801_readw(chip, IRQ_MASK);

  	if (chip->irq < 0)
  		cmdw |= 0x00c3;		/* mask everything, no PCM nor MPU */
  	else
  		cmdw &= ~0x0083;	/* unmask MPU, PLAYBACK & CAPTURE */

  	fm801_writew(chip, IRQ_MASK, cmdw);

  
  	/* interrupt clear */

  	fm801_writew(chip, IRQ_STATUS,
  		     FM801_IRQ_PLAYBACK | FM801_IRQ_CAPTURE | FM801_IRQ_MPU);

  }

  static int snd_fm801_free(struct fm801 *chip)

  {
  	unsigned short cmdw;
  
  	if (chip->irq < 0)
  		goto __end_hw;
  
  	/* interrupt setup - mask everything */

  	cmdw = fm801_readw(chip, IRQ_MASK);

  	cmdw |= 0x00c3;

  	fm801_writew(chip, IRQ_MASK, cmdw);

  	devm_free_irq(chip->dev, chip->irq, chip);

        __end_hw:

  #ifdef CONFIG_SND_FM801_TEA575X_BOOL

  	if (!(chip->tea575x_tuner & TUNER_DISABLED)) {

  		snd_tea575x_exit(&chip->tea);

  		v4l2_device_unregister(&chip->v4l2_dev);
  	}

  #endif

  	return 0;
  }

  static int snd_fm801_dev_free(struct snd_device *device)

  {

  	struct fm801 *chip = device->device_data;

  	return snd_fm801_free(chip);
  }

  static int snd_fm801_create(struct snd_card *card,
  			    struct pci_dev *pci,
  			    int tea575x_tuner,
  			    int radio_nr,
  			    struct fm801 **rchip)

  {

  	struct fm801 *chip;

  	int err;

  	static const struct snd_device_ops ops = {

  		.dev_free =	snd_fm801_dev_free,
  	};
  
  	*rchip = NULL;

  	if ((err = pcim_enable_device(pci)) < 0)

  		return err;

  	chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
  	if (chip == NULL)

  		return -ENOMEM;

  	spin_lock_init(&chip->reg_lock);
  	chip->card = card;

  	chip->dev = &pci->dev;

  	chip->irq = -1;

  	chip->tea575x_tuner = tea575x_tuner;

  	if ((err = pci_request_regions(pci, "FM801")) < 0)

  		return err;

  	chip->port = pci_resource_start(pci, 0);

  
  	if (pci->revision >= 0xb1)	/* FM801-AU */
  		chip->multichannel = 1;
  
  	if (!(chip->tea575x_tuner & TUNER_ONLY)) {
  		if (reset_codec(chip) < 0) {
  			dev_info(chip->card->dev,
  				 "Primary AC'97 codec not found, assume SF64-PCR (tuner-only)
  ");
  			chip->tea575x_tuner = 3 | TUNER_ONLY;
  		} else {
  			snd_fm801_chip_multichannel_init(chip);
  		}
  	}

  	if ((chip->tea575x_tuner & TUNER_ONLY) == 0) {

  		if (devm_request_irq(&pci->dev, pci->irq, snd_fm801_interrupt,
  				IRQF_SHARED, KBUILD_MODNAME, chip)) {
  			dev_err(card->dev, "unable to grab IRQ %d
  ", pci->irq);

  			snd_fm801_free(chip);
  			return -EBUSY;
  		}
  		chip->irq = pci->irq;

  		card->sync_irq = chip->irq;

  		pci_set_master(pci);

  	}

  	snd_fm801_chip_init(chip);

  	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
  		snd_fm801_free(chip);
  		return err;
  	}

  #ifdef CONFIG_SND_FM801_TEA575X_BOOL

  	err = v4l2_device_register(&pci->dev, &chip->v4l2_dev);
  	if (err < 0) {
  		snd_fm801_free(chip);
  		return err;
  	}
  	chip->tea.v4l2_dev = &chip->v4l2_dev;
  	chip->tea.radio_nr = radio_nr;

  	chip->tea.private_data = chip;
  	chip->tea.ops = &snd_fm801_tea_ops;

  	sprintf(chip->tea.bus_info, "PCI:%s", pci_name(pci));

  	if ((chip->tea575x_tuner & TUNER_TYPE_MASK) > 0 &&
  	    (chip->tea575x_tuner & TUNER_TYPE_MASK) < 4) {

  		if (snd_tea575x_init(&chip->tea, THIS_MODULE)) {

  			dev_err(card->dev, "TEA575x radio not found
  ");

  			snd_fm801_free(chip);

  			return -ENODEV;
  		}

  	} else if ((chip->tea575x_tuner & TUNER_TYPE_MASK) == 0) {
  		unsigned int tuner_only = chip->tea575x_tuner & TUNER_ONLY;

  		/* autodetect tuner connection */
  		for (tea575x_tuner = 1; tea575x_tuner <= 3; tea575x_tuner++) {
  			chip->tea575x_tuner = tea575x_tuner;

  			if (!snd_tea575x_init(&chip->tea, THIS_MODULE)) {

  				dev_info(card->dev,
  					 "detected TEA575x radio type %s
  ",

  					   get_tea575x_gpio(chip)->name);

  				break;
  			}
  		}

  		if (tea575x_tuner == 4) {

  			dev_err(card->dev, "TEA575x radio not found
  ");

  			chip->tea575x_tuner = TUNER_DISABLED;

  		}

  
  		chip->tea575x_tuner |= tuner_only;

  	}

  	if (!(chip->tea575x_tuner & TUNER_DISABLED)) {

  		strlcpy(chip->tea.card, get_tea575x_gpio(chip)->name,

  			sizeof(chip->tea.card));
  	}

  #endif
  
  	*rchip = chip;
  	return 0;
  }

  static int snd_card_fm801_probe(struct pci_dev *pci,
  				const struct pci_device_id *pci_id)

  {
  	static int dev;

  	struct snd_card *card;
  	struct fm801 *chip;
  	struct snd_opl3 *opl3;

  	int err;
  
          if (dev >= SNDRV_CARDS)
                  return -ENODEV;
  	if (!enable[dev]) {
  		dev++;
  		return -ENOENT;
  	}

  	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
  			   0, &card);

  	if (err < 0)
  		return err;

  	if ((err = snd_fm801_create(card, pci, tea575x_tuner[dev], radio_nr[dev], &chip)) < 0) {

  		snd_card_free(card);
  		return err;
  	}

  	card->private_data = chip;

  
  	strcpy(card->driver, "FM801");
  	strcpy(card->shortname, "ForteMedia FM801-");
  	strcat(card->shortname, chip->multichannel ? "AU" : "AS");
  	sprintf(card->longname, "%s at 0x%lx, irq %i",
  		card->shortname, chip->port, chip->irq);

  	if (chip->tea575x_tuner & TUNER_ONLY)

  		goto __fm801_tuner_only;

  	if ((err = snd_fm801_pcm(chip, 0)) < 0) {

  		snd_card_free(card);
  		return err;
  	}
  	if ((err = snd_fm801_mixer(chip)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_FM801,

  				       chip->port + FM801_MPU401_DATA,

  				       MPU401_INFO_INTEGRATED |
  				       MPU401_INFO_IRQ_HOOK,
  				       -1, &chip->rmidi)) < 0) {

  		snd_card_free(card);
  		return err;
  	}

  	if ((err = snd_opl3_create(card, chip->port + FM801_OPL3_BANK0,
  				   chip->port + FM801_OPL3_BANK1,

  				   OPL3_HW_OPL3_FM801, 1, &opl3)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
  		snd_card_free(card);
  		return err;
  	}

        __fm801_tuner_only:

  	if ((err = snd_card_register(card)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	pci_set_drvdata(pci, card);
  	dev++;
  	return 0;
  }

  static void snd_card_fm801_remove(struct pci_dev *pci)

  {
  	snd_card_free(pci_get_drvdata(pci));

  }

  #ifdef CONFIG_PM_SLEEP

  static const unsigned char saved_regs[] = {

  	FM801_PCM_VOL, FM801_I2S_VOL, FM801_FM_VOL, FM801_REC_SRC,
  	FM801_PLY_CTRL, FM801_PLY_COUNT, FM801_PLY_BUF1, FM801_PLY_BUF2,
  	FM801_CAP_CTRL, FM801_CAP_COUNT, FM801_CAP_BUF1, FM801_CAP_BUF2,
  	FM801_CODEC_CTRL, FM801_I2S_MODE, FM801_VOLUME, FM801_GEN_CTRL,
  };

  static int snd_fm801_suspend(struct device *dev)

  {

  	struct snd_card *card = dev_get_drvdata(dev);

  	struct fm801 *chip = card->private_data;
  	int i;
  
  	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);

  	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)

  		chip->saved_regs[i] = fm801_ioread16(chip, saved_regs[i]);

  	if (chip->tea575x_tuner & TUNER_ONLY) {
  		/* FIXME: tea575x suspend */
  	} else {

  		snd_ac97_suspend(chip->ac97);
  		snd_ac97_suspend(chip->ac97_sec);
  	}

  	return 0;
  }

  static int snd_fm801_resume(struct device *dev)

  {

  	struct snd_card *card = dev_get_drvdata(dev);

  	struct fm801 *chip = card->private_data;
  	int i;

  	if (chip->tea575x_tuner & TUNER_ONLY) {
  		snd_fm801_chip_init(chip);
  	} else {
  		reset_codec(chip);
  		snd_fm801_chip_multichannel_init(chip);
  		snd_fm801_chip_init(chip);

  		snd_ac97_resume(chip->ac97);
  		snd_ac97_resume(chip->ac97_sec);

  	}

  	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)

  		fm801_iowrite16(chip, saved_regs[i], chip->saved_regs[i]);

  #ifdef CONFIG_SND_FM801_TEA575X_BOOL
  	if (!(chip->tea575x_tuner & TUNER_DISABLED))
  		snd_tea575x_set_freq(&chip->tea);
  #endif

  
  	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
  	return 0;
  }

  
  static SIMPLE_DEV_PM_OPS(snd_fm801_pm, snd_fm801_suspend, snd_fm801_resume);
  #define SND_FM801_PM_OPS	&snd_fm801_pm
  #else
  #define SND_FM801_PM_OPS	NULL

  #endif /* CONFIG_PM_SLEEP */

  static struct pci_driver fm801_driver = {

  	.name = KBUILD_MODNAME,

  	.id_table = snd_fm801_ids,
  	.probe = snd_card_fm801_probe,

  	.remove = snd_card_fm801_remove,

  	.driver = {
  		.pm = SND_FM801_PM_OPS,
  	},

  };

  module_pci_driver(fm801_driver);