/*
   *   ALSA driver for RME Digi32, Digi32/8 and Digi32 PRO audio interfaces
   *
   *      Copyright (c) 2002-2004 Martin Langer <martin-langer@gmx.de>,
   *                              Pilo Chambert <pilo.c@wanadoo.fr>
   *
   *      Thanks to :        Anders Torger <torger@ludd.luth.se>,
   *                         Henk Hesselink <henk@anda.nl>
   *                         for writing the digi96-driver 
   *                         and RME for all informations.
   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
   * 
   * 
   * ****************************************************************************
   * 
   * Note #1 "Sek'd models" ................................... martin 2002-12-07
   * 
   * Identical soundcards by Sek'd were labeled:
   * RME Digi 32     = Sek'd Prodif 32
   * RME Digi 32 Pro = Sek'd Prodif 96
   * RME Digi 32/8   = Sek'd Prodif Gold
   * 
   * ****************************************************************************
   * 
   * Note #2 "full duplex mode" ............................... martin 2002-12-07
   * 
   * Full duplex doesn't work. All cards (32, 32/8, 32Pro) are working identical
   * in this mode. Rec data and play data are using the same buffer therefore. At
   * first you have got the playing bits in the buffer and then (after playing
   * them) they were overwitten by the captured sound of the CS8412/14. Both 
   * modes (play/record) are running harmonically hand in hand in the same buffer
   * and you have only one start bit plus one interrupt bit to control this 
   * paired action.
   * This is opposite to the latter rme96 where playing and capturing is totally
   * separated and so their full duplex mode is supported by alsa (using two 
   * start bits and two interrupts for two different buffers). 
   * But due to the wrong sequence of playing and capturing ALSA shows no solved
   * full duplex support for the rme32 at the moment. That's bad, but I'm not
   * able to solve it. Are you motivated enough to solve this problem now? Your
   * patch would be welcome!
   * 
   * ****************************************************************************
   *
   * "The story after the long seeking" -- tiwai
   *
   * Ok, the situation regarding the full duplex is now improved a bit.
   * In the fullduplex mode (given by the module parameter), the hardware buffer
   * is split to halves for read and write directions at the DMA pointer.
   * That is, the half above the current DMA pointer is used for write, and
   * the half below is used for read.  To mangle this strange behavior, an
   * software intermediate buffer is introduced.  This is, of course, not good
   * from the viewpoint of the data transfer efficiency.  However, this allows
   * you to use arbitrary buffer sizes, instead of the fixed I/O buffer size.
   *
   * ****************************************************************************
   */
  
  
  #include <sound/driver.h>
  #include <linux/delay.h>
  #include <linux/init.h>
  #include <linux/interrupt.h>
  #include <linux/pci.h>
  #include <linux/slab.h>
  #include <linux/moduleparam.h>
  
  #include <sound/core.h>
  #include <sound/info.h>
  #include <sound/control.h>
  #include <sound/pcm.h>
  #include <sound/pcm_params.h>
  #include <sound/pcm-indirect.h>
  #include <sound/asoundef.h>
  #include <sound/initval.h>
  
  #include <asm/io.h>
  
  static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
  static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
  static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
  static int fullduplex[SNDRV_CARDS]; // = {[0 ... (SNDRV_CARDS - 1)] = 1};
  
  module_param_array(index, int, NULL, 0444);
  MODULE_PARM_DESC(index, "Index value for RME Digi32 soundcard.");
  module_param_array(id, charp, NULL, 0444);
  MODULE_PARM_DESC(id, "ID string for RME Digi32 soundcard.");
  module_param_array(enable, bool, NULL, 0444);
  MODULE_PARM_DESC(enable, "Enable RME Digi32 soundcard.");
  module_param_array(fullduplex, bool, NULL, 0444);
  MODULE_PARM_DESC(fullduplex, "Support full-duplex mode.");
  MODULE_AUTHOR("Martin Langer <martin-langer@gmx.de>, Pilo Chambert <pilo.c@wanadoo.fr>");
  MODULE_DESCRIPTION("RME Digi32, Digi32/8, Digi32 PRO");
  MODULE_LICENSE("GPL");
  MODULE_SUPPORTED_DEVICE("{{RME,Digi32}," "{RME,Digi32/8}," "{RME,Digi32 PRO}}");
  
  /* Defines for RME Digi32 series */
  #define RME32_SPDIF_NCHANNELS 2
  
  /* Playback and capture buffer size */
  #define RME32_BUFFER_SIZE 0x20000
  
  /* IO area size */
  #define RME32_IO_SIZE 0x30000
  
  /* IO area offsets */
  #define RME32_IO_DATA_BUFFER        0x0
  #define RME32_IO_CONTROL_REGISTER   0x20000
  #define RME32_IO_GET_POS            0x20000
  #define RME32_IO_CONFIRM_ACTION_IRQ 0x20004
  #define RME32_IO_RESET_POS          0x20100
  
  /* Write control register bits */
  #define RME32_WCR_START     (1 << 0)    /* startbit */
  #define RME32_WCR_MONO      (1 << 1)    /* 0=stereo, 1=mono
                                             Setting the whole card to mono
                                             doesn't seem to be very useful.
                                             A software-solution can handle 
                                             full-duplex with one direction in
                                             stereo and the other way in mono. 
                                             So, the hardware should work all 
                                             the time in stereo! */
  #define RME32_WCR_MODE24    (1 << 2)    /* 0=16bit, 1=32bit */
  #define RME32_WCR_SEL       (1 << 3)    /* 0=input on output, 1=normal playback/capture */
  #define RME32_WCR_FREQ_0    (1 << 4)    /* frequency (play) */
  #define RME32_WCR_FREQ_1    (1 << 5)
  #define RME32_WCR_INP_0     (1 << 6)    /* input switch */
  #define RME32_WCR_INP_1     (1 << 7)
  #define RME32_WCR_RESET     (1 << 8)    /* Reset address */
  #define RME32_WCR_MUTE      (1 << 9)    /* digital mute for output */
  #define RME32_WCR_PRO       (1 << 10)   /* 1=professional, 0=consumer */
  #define RME32_WCR_DS_BM     (1 << 11)	/* 1=DoubleSpeed (only PRO-Version); 1=BlockMode (only Adat-Version) */
  #define RME32_WCR_ADAT      (1 << 12)	/* Adat Mode (only Adat-Version) */
  #define RME32_WCR_AUTOSYNC  (1 << 13)   /* AutoSync */
  #define RME32_WCR_PD        (1 << 14)	/* DAC Reset (only PRO-Version) */
  #define RME32_WCR_EMP       (1 << 15)	/* 1=Emphasis on (only PRO-Version) */
  
  #define RME32_WCR_BITPOS_FREQ_0 4
  #define RME32_WCR_BITPOS_FREQ_1 5
  #define RME32_WCR_BITPOS_INP_0 6
  #define RME32_WCR_BITPOS_INP_1 7
  
  /* Read control register bits */
  #define RME32_RCR_AUDIO_ADDR_MASK 0x1ffff
  #define RME32_RCR_LOCK      (1 << 23)   /* 1=locked, 0=not locked */
  #define RME32_RCR_ERF       (1 << 26)   /* 1=Error, 0=no Error */
  #define RME32_RCR_FREQ_0    (1 << 27)   /* CS841x frequency (record) */
  #define RME32_RCR_FREQ_1    (1 << 28)
  #define RME32_RCR_FREQ_2    (1 << 29)
  #define RME32_RCR_KMODE     (1 << 30)   /* card mode: 1=PLL, 0=quartz */
  #define RME32_RCR_IRQ       (1 << 31)   /* interrupt */
  
  #define RME32_RCR_BITPOS_F0 27
  #define RME32_RCR_BITPOS_F1 28
  #define RME32_RCR_BITPOS_F2 29
  
  /* Input types */
  #define RME32_INPUT_OPTICAL 0
  #define RME32_INPUT_COAXIAL 1
  #define RME32_INPUT_INTERNAL 2
  #define RME32_INPUT_XLR 3
  
  /* Clock modes */
  #define RME32_CLOCKMODE_SLAVE 0
  #define RME32_CLOCKMODE_MASTER_32 1
  #define RME32_CLOCKMODE_MASTER_44 2
  #define RME32_CLOCKMODE_MASTER_48 3
  
  /* Block sizes in bytes */
  #define RME32_BLOCK_SIZE 8192
  
  /* Software intermediate buffer (max) size */
  #define RME32_MID_BUFFER_SIZE (1024*1024)
  
  /* Hardware revisions */
  #define RME32_32_REVISION 192
  #define RME32_328_REVISION_OLD 100
  #define RME32_328_REVISION_NEW 101
  #define RME32_PRO_REVISION_WITH_8412 192
  #define RME32_PRO_REVISION_WITH_8414 150

  struct rme32 {

  	spinlock_t lock;
  	int irq;
  	unsigned long port;
  	void __iomem *iobase;
  
  	u32 wcreg;		/* cached write control register value */
  	u32 wcreg_spdif;	/* S/PDIF setup */
  	u32 wcreg_spdif_stream;	/* S/PDIF setup (temporary) */
  	u32 rcreg;		/* cached read control register value */
  
  	u8 rev;			/* card revision number */

  	struct snd_pcm_substream *playback_substream;
  	struct snd_pcm_substream *capture_substream;

  
  	int playback_frlog;	/* log2 of framesize */
  	int capture_frlog;
  
  	size_t playback_periodsize;	/* in bytes, zero if not used */
  	size_t capture_periodsize;	/* in bytes, zero if not used */
  
  	unsigned int fullduplex_mode;
  	int running;

  	struct snd_pcm_indirect playback_pcm;
  	struct snd_pcm_indirect capture_pcm;

  	struct snd_card *card;
  	struct snd_pcm *spdif_pcm;
  	struct snd_pcm *adat_pcm;

  	struct pci_dev *pci;

  	struct snd_kcontrol *spdif_ctl;
  };

  static struct pci_device_id snd_rme32_ids[] = {

  	{PCI_VENDOR_ID_XILINX_RME, PCI_DEVICE_ID_RME_DIGI32,

  	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0,},

  	{PCI_VENDOR_ID_XILINX_RME, PCI_DEVICE_ID_RME_DIGI32_8,

  	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0,},

  	{PCI_VENDOR_ID_XILINX_RME, PCI_DEVICE_ID_RME_DIGI32_PRO,

  	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0,},
  	{0,}
  };
  
  MODULE_DEVICE_TABLE(pci, snd_rme32_ids);
  
  #define RME32_ISWORKING(rme32) ((rme32)->wcreg & RME32_WCR_START)

  #define RME32_PRO_WITH_8414(rme32) ((rme32)->pci->device == PCI_DEVICE_ID_RME_DIGI32_PRO && (rme32)->rev == RME32_PRO_REVISION_WITH_8414)

  static int snd_rme32_playback_prepare(struct snd_pcm_substream *substream);

  static int snd_rme32_capture_prepare(struct snd_pcm_substream *substream);

  static int snd_rme32_pcm_trigger(struct snd_pcm_substream *substream, int cmd);

  static void snd_rme32_proc_init(struct rme32 * rme32);

  static int snd_rme32_create_switches(struct snd_card *card, struct rme32 * rme32);

  static inline unsigned int snd_rme32_pcm_byteptr(struct rme32 * rme32)

  {
  	return (readl(rme32->iobase + RME32_IO_GET_POS)
  		& RME32_RCR_AUDIO_ADDR_MASK);
  }
  
  static int snd_rme32_ratecode(int rate)
  {
  	switch (rate) {
  	case 32000: return SNDRV_PCM_RATE_32000;
  	case 44100: return SNDRV_PCM_RATE_44100;
  	case 48000: return SNDRV_PCM_RATE_48000;
  	case 64000: return SNDRV_PCM_RATE_64000;
  	case 88200: return SNDRV_PCM_RATE_88200;
  	case 96000: return SNDRV_PCM_RATE_96000;
  	}
  	return 0;
  }
  
  /* silence callback for halfduplex mode */

  static int snd_rme32_playback_silence(struct snd_pcm_substream *substream, int channel,	/* not used (interleaved data) */

  				      snd_pcm_uframes_t pos,
  				      snd_pcm_uframes_t count)
  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	count <<= rme32->playback_frlog;
  	pos <<= rme32->playback_frlog;
  	memset_io(rme32->iobase + RME32_IO_DATA_BUFFER + pos, 0, count);
  	return 0;
  }
  
  /* copy callback for halfduplex mode */

  static int snd_rme32_playback_copy(struct snd_pcm_substream *substream, int channel,	/* not used (interleaved data) */

  				   snd_pcm_uframes_t pos,
  				   void __user *src, snd_pcm_uframes_t count)
  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	count <<= rme32->playback_frlog;
  	pos <<= rme32->playback_frlog;
  	if (copy_from_user_toio(rme32->iobase + RME32_IO_DATA_BUFFER + pos,
  			    src, count))
  		return -EFAULT;
  	return 0;
  }
  
  /* copy callback for halfduplex mode */

  static int snd_rme32_capture_copy(struct snd_pcm_substream *substream, int channel,	/* not used (interleaved data) */

  				  snd_pcm_uframes_t pos,
  				  void __user *dst, snd_pcm_uframes_t count)
  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	count <<= rme32->capture_frlog;
  	pos <<= rme32->capture_frlog;
  	if (copy_to_user_fromio(dst,
  			    rme32->iobase + RME32_IO_DATA_BUFFER + pos,
  			    count))
  		return -EFAULT;
  	return 0;
  }
  
  /*

   * SPDIF I/O capabilities (half-duplex mode)

   */

  static struct snd_pcm_hardware snd_rme32_spdif_info = {

  	.info =		(SNDRV_PCM_INFO_MMAP_IOMEM |
  			 SNDRV_PCM_INFO_MMAP_VALID |
  			 SNDRV_PCM_INFO_INTERLEAVED | 
  			 SNDRV_PCM_INFO_PAUSE |
  			 SNDRV_PCM_INFO_SYNC_START),
  	.formats =	(SNDRV_PCM_FMTBIT_S16_LE | 
  			 SNDRV_PCM_FMTBIT_S32_LE),
  	.rates =	(SNDRV_PCM_RATE_32000 |
  			 SNDRV_PCM_RATE_44100 | 
  			 SNDRV_PCM_RATE_48000),
  	.rate_min =	32000,
  	.rate_max =	48000,
  	.channels_min =	2,
  	.channels_max =	2,
  	.buffer_bytes_max = RME32_BUFFER_SIZE,
  	.period_bytes_min = RME32_BLOCK_SIZE,
  	.period_bytes_max = RME32_BLOCK_SIZE,
  	.periods_min =	RME32_BUFFER_SIZE / RME32_BLOCK_SIZE,
  	.periods_max =	RME32_BUFFER_SIZE / RME32_BLOCK_SIZE,
  	.fifo_size =	0,
  };
  
  /*

   * ADAT I/O capabilities (half-duplex mode)

   */

  static struct snd_pcm_hardware snd_rme32_adat_info =

  {
  	.info =		     (SNDRV_PCM_INFO_MMAP_IOMEM |
  			      SNDRV_PCM_INFO_MMAP_VALID |
  			      SNDRV_PCM_INFO_INTERLEAVED |
  			      SNDRV_PCM_INFO_PAUSE |
  			      SNDRV_PCM_INFO_SYNC_START),
  	.formats=            SNDRV_PCM_FMTBIT_S16_LE,
  	.rates =             (SNDRV_PCM_RATE_44100 | 
  			      SNDRV_PCM_RATE_48000),
  	.rate_min =          44100,
  	.rate_max =          48000,
  	.channels_min =      8,
  	.channels_max =	     8,
  	.buffer_bytes_max =  RME32_BUFFER_SIZE,
  	.period_bytes_min =  RME32_BLOCK_SIZE,
  	.period_bytes_max =  RME32_BLOCK_SIZE,
  	.periods_min =	    RME32_BUFFER_SIZE / RME32_BLOCK_SIZE,
  	.periods_max =	    RME32_BUFFER_SIZE / RME32_BLOCK_SIZE,
  	.fifo_size =	    0,
  };
  
  /*

   * SPDIF I/O capabilities (full-duplex mode)

   */

  static struct snd_pcm_hardware snd_rme32_spdif_fd_info = {

  	.info =		(SNDRV_PCM_INFO_MMAP |
  			 SNDRV_PCM_INFO_MMAP_VALID |
  			 SNDRV_PCM_INFO_INTERLEAVED | 
  			 SNDRV_PCM_INFO_PAUSE |
  			 SNDRV_PCM_INFO_SYNC_START),
  	.formats =	(SNDRV_PCM_FMTBIT_S16_LE | 
  			 SNDRV_PCM_FMTBIT_S32_LE),
  	.rates =	(SNDRV_PCM_RATE_32000 |
  			 SNDRV_PCM_RATE_44100 | 
  			 SNDRV_PCM_RATE_48000),
  	.rate_min =	32000,
  	.rate_max =	48000,
  	.channels_min =	2,
  	.channels_max =	2,
  	.buffer_bytes_max = RME32_MID_BUFFER_SIZE,
  	.period_bytes_min = RME32_BLOCK_SIZE,
  	.period_bytes_max = RME32_BLOCK_SIZE,
  	.periods_min =	2,
  	.periods_max =	RME32_MID_BUFFER_SIZE / RME32_BLOCK_SIZE,
  	.fifo_size =	0,
  };
  
  /*

   * ADAT I/O capabilities (full-duplex mode)

   */

  static struct snd_pcm_hardware snd_rme32_adat_fd_info =

  {
  	.info =		     (SNDRV_PCM_INFO_MMAP |
  			      SNDRV_PCM_INFO_MMAP_VALID |
  			      SNDRV_PCM_INFO_INTERLEAVED |
  			      SNDRV_PCM_INFO_PAUSE |
  			      SNDRV_PCM_INFO_SYNC_START),
  	.formats=            SNDRV_PCM_FMTBIT_S16_LE,
  	.rates =             (SNDRV_PCM_RATE_44100 | 
  			      SNDRV_PCM_RATE_48000),
  	.rate_min =          44100,
  	.rate_max =          48000,
  	.channels_min =      8,
  	.channels_max =	     8,
  	.buffer_bytes_max =  RME32_MID_BUFFER_SIZE,
  	.period_bytes_min =  RME32_BLOCK_SIZE,
  	.period_bytes_max =  RME32_BLOCK_SIZE,
  	.periods_min =	    2,
  	.periods_max =	    RME32_MID_BUFFER_SIZE / RME32_BLOCK_SIZE,
  	.fifo_size =	    0,
  };

  static void snd_rme32_reset_dac(struct rme32 *rme32)

  {
          writel(rme32->wcreg | RME32_WCR_PD,
                 rme32->iobase + RME32_IO_CONTROL_REGISTER);
          writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  }

  static int snd_rme32_playback_getrate(struct rme32 * rme32)

  {
  	int rate;
  
  	rate = ((rme32->wcreg >> RME32_WCR_BITPOS_FREQ_0) & 1) +
  	       (((rme32->wcreg >> RME32_WCR_BITPOS_FREQ_1) & 1) << 1);
  	switch (rate) {
  	case 1:
  		rate = 32000;
  		break;
  	case 2:
  		rate = 44100;
  		break;
  	case 3:
  		rate = 48000;
  		break;
  	default:
  		return -1;
  	}
  	return (rme32->wcreg & RME32_WCR_DS_BM) ? rate << 1 : rate;
  }

  static int snd_rme32_capture_getrate(struct rme32 * rme32, int *is_adat)

  {
  	int n;
  
  	*is_adat = 0;
  	if (rme32->rcreg & RME32_RCR_LOCK) { 
                  /* ADAT rate */
                  *is_adat = 1;
  	}
  	if (rme32->rcreg & RME32_RCR_ERF) {
  		return -1;
  	}
  
          /* S/PDIF rate */
  	n = ((rme32->rcreg >> RME32_RCR_BITPOS_F0) & 1) +
  		(((rme32->rcreg >> RME32_RCR_BITPOS_F1) & 1) << 1) +
  		(((rme32->rcreg >> RME32_RCR_BITPOS_F2) & 1) << 2);
  
  	if (RME32_PRO_WITH_8414(rme32))
  		switch (n) {	/* supporting the CS8414 */
  		case 0:
  		case 1:
  		case 2:
  			return -1;
  		case 3:
  			return 96000;
  		case 4:
  			return 88200;
  		case 5:
  			return 48000;
  		case 6:
  			return 44100;
  		case 7:
  			return 32000;
  		default:
  			return -1;
  			break;
  		} 
  	else
  		switch (n) {	/* supporting the CS8412 */
  		case 0:
  			return -1;
  		case 1:
  			return 48000;
  		case 2:
  			return 44100;
  		case 3:
  			return 32000;
  		case 4:
  			return 48000;
  		case 5:
  			return 44100;
  		case 6:
  			return 44056;
  		case 7:
  			return 32000;
  		default:
  			break;
  		}
  	return -1;
  }

  static int snd_rme32_playback_setrate(struct rme32 * rme32, int rate)

  {
          int ds;
  
          ds = rme32->wcreg & RME32_WCR_DS_BM;
  	switch (rate) {
  	case 32000:
  		rme32->wcreg &= ~RME32_WCR_DS_BM;
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_0) & 
  			~RME32_WCR_FREQ_1;
  		break;
  	case 44100:
  		rme32->wcreg &= ~RME32_WCR_DS_BM;
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_1) & 
  			~RME32_WCR_FREQ_0;
  		break;
  	case 48000:
  		rme32->wcreg &= ~RME32_WCR_DS_BM;
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_0) | 
  			RME32_WCR_FREQ_1;
  		break;
  	case 64000:

  		if (rme32->pci->device != PCI_DEVICE_ID_RME_DIGI32_PRO)

  			return -EINVAL;
  		rme32->wcreg |= RME32_WCR_DS_BM;
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_0) & 
  			~RME32_WCR_FREQ_1;
  		break;
  	case 88200:

  		if (rme32->pci->device != PCI_DEVICE_ID_RME_DIGI32_PRO)

  			return -EINVAL;
  		rme32->wcreg |= RME32_WCR_DS_BM;
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_1) & 
  			~RME32_WCR_FREQ_0;
  		break;
  	case 96000:

  		if (rme32->pci->device != PCI_DEVICE_ID_RME_DIGI32_PRO)

  			return -EINVAL;
  		rme32->wcreg |= RME32_WCR_DS_BM;
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_0) | 
  			RME32_WCR_FREQ_1;
  		break;
  	default:
  		return -EINVAL;
  	}
          if ((!ds && rme32->wcreg & RME32_WCR_DS_BM) ||
              (ds && !(rme32->wcreg & RME32_WCR_DS_BM)))
          {
                  /* change to/from double-speed: reset the DAC (if available) */
                  snd_rme32_reset_dac(rme32);
          } else {
                  writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	}
  	return 0;
  }

  static int snd_rme32_setclockmode(struct rme32 * rme32, int mode)

  {
  	switch (mode) {
  	case RME32_CLOCKMODE_SLAVE:
  		/* AutoSync */
  		rme32->wcreg = (rme32->wcreg & ~RME32_WCR_FREQ_0) & 
  			~RME32_WCR_FREQ_1;
  		break;
  	case RME32_CLOCKMODE_MASTER_32:
  		/* Internal 32.0kHz */
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_0) & 
  			~RME32_WCR_FREQ_1;
  		break;
  	case RME32_CLOCKMODE_MASTER_44:
  		/* Internal 44.1kHz */
  		rme32->wcreg = (rme32->wcreg & ~RME32_WCR_FREQ_0) | 
  			RME32_WCR_FREQ_1;
  		break;
  	case RME32_CLOCKMODE_MASTER_48:
  		/* Internal 48.0kHz */
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_FREQ_0) | 
  			RME32_WCR_FREQ_1;
  		break;
  	default:
  		return -EINVAL;
  	}
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	return 0;
  }

  static int snd_rme32_getclockmode(struct rme32 * rme32)

  {
  	return ((rme32->wcreg >> RME32_WCR_BITPOS_FREQ_0) & 1) +
  	    (((rme32->wcreg >> RME32_WCR_BITPOS_FREQ_1) & 1) << 1);
  }

  static int snd_rme32_setinputtype(struct rme32 * rme32, int type)

  {
  	switch (type) {
  	case RME32_INPUT_OPTICAL:
  		rme32->wcreg = (rme32->wcreg & ~RME32_WCR_INP_0) & 
  			~RME32_WCR_INP_1;
  		break;
  	case RME32_INPUT_COAXIAL:
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_INP_0) & 
  			~RME32_WCR_INP_1;
  		break;
  	case RME32_INPUT_INTERNAL:
  		rme32->wcreg = (rme32->wcreg & ~RME32_WCR_INP_0) | 
  			RME32_WCR_INP_1;
  		break;
  	case RME32_INPUT_XLR:
  		rme32->wcreg = (rme32->wcreg | RME32_WCR_INP_0) | 
  			RME32_WCR_INP_1;
  		break;
  	default:
  		return -EINVAL;
  	}
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	return 0;
  }

  static int snd_rme32_getinputtype(struct rme32 * rme32)

  {
  	return ((rme32->wcreg >> RME32_WCR_BITPOS_INP_0) & 1) +
  	    (((rme32->wcreg >> RME32_WCR_BITPOS_INP_1) & 1) << 1);
  }
  
  static void

  snd_rme32_setframelog(struct rme32 * rme32, int n_channels, int is_playback)

  {
  	int frlog;
  
  	if (n_channels == 2) {
  		frlog = 1;
  	} else {
  		/* assume 8 channels */
  		frlog = 3;
  	}
  	if (is_playback) {
  		frlog += (rme32->wcreg & RME32_WCR_MODE24) ? 2 : 1;
  		rme32->playback_frlog = frlog;
  	} else {
  		frlog += (rme32->wcreg & RME32_WCR_MODE24) ? 2 : 1;
  		rme32->capture_frlog = frlog;
  	}
  }

  static int snd_rme32_setformat(struct rme32 * rme32, int format)

  {
  	switch (format) {
  	case SNDRV_PCM_FORMAT_S16_LE:
  		rme32->wcreg &= ~RME32_WCR_MODE24;
  		break;
  	case SNDRV_PCM_FORMAT_S32_LE:
  		rme32->wcreg |= RME32_WCR_MODE24;
  		break;
  	default:
  		return -EINVAL;
  	}
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	return 0;
  }
  
  static int

  snd_rme32_playback_hw_params(struct snd_pcm_substream *substream,
  			     struct snd_pcm_hw_params *params)

  {
  	int err, rate, dummy;

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  
  	if (rme32->fullduplex_mode) {
  		err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
  		if (err < 0)
  			return err;
  	} else {

  		runtime->dma_area = (void __force *)(rme32->iobase +
  						     RME32_IO_DATA_BUFFER);

  		runtime->dma_addr = rme32->port + RME32_IO_DATA_BUFFER;
  		runtime->dma_bytes = RME32_BUFFER_SIZE;
  	}
  
  	spin_lock_irq(&rme32->lock);
  	if ((rme32->rcreg & RME32_RCR_KMODE) &&
  	    (rate = snd_rme32_capture_getrate(rme32, &dummy)) > 0) {
  		/* AutoSync */
  		if ((int)params_rate(params) != rate) {
  			spin_unlock_irq(&rme32->lock);
  			return -EIO;
  		}
  	} else if ((err = snd_rme32_playback_setrate(rme32, params_rate(params))) < 0) {
  		spin_unlock_irq(&rme32->lock);
  		return err;
  	}
  	if ((err = snd_rme32_setformat(rme32, params_format(params))) < 0) {
  		spin_unlock_irq(&rme32->lock);
  		return err;
  	}
  
  	snd_rme32_setframelog(rme32, params_channels(params), 1);
  	if (rme32->capture_periodsize != 0) {
  		if (params_period_size(params) << rme32->playback_frlog != rme32->capture_periodsize) {
  			spin_unlock_irq(&rme32->lock);
  			return -EBUSY;
  		}
  	}
  	rme32->playback_periodsize = params_period_size(params) << rme32->playback_frlog;
  	/* S/PDIF setup */
  	if ((rme32->wcreg & RME32_WCR_ADAT) == 0) {
  		rme32->wcreg &= ~(RME32_WCR_PRO | RME32_WCR_EMP);
  		rme32->wcreg |= rme32->wcreg_spdif_stream;
  		writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	}
  	spin_unlock_irq(&rme32->lock);
  
  	return 0;
  }
  
  static int

  snd_rme32_capture_hw_params(struct snd_pcm_substream *substream,
  			    struct snd_pcm_hw_params *params)

  {
  	int err, isadat, rate;

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  
  	if (rme32->fullduplex_mode) {
  		err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
  		if (err < 0)
  			return err;
  	} else {

  		runtime->dma_area = (void __force *)rme32->iobase +
  					RME32_IO_DATA_BUFFER;

  		runtime->dma_addr = rme32->port + RME32_IO_DATA_BUFFER;
  		runtime->dma_bytes = RME32_BUFFER_SIZE;
  	}
  
  	spin_lock_irq(&rme32->lock);
  	/* enable AutoSync for record-preparing */
  	rme32->wcreg |= RME32_WCR_AUTOSYNC;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  
  	if ((err = snd_rme32_setformat(rme32, params_format(params))) < 0) {
  		spin_unlock_irq(&rme32->lock);
  		return err;
  	}
  	if ((err = snd_rme32_playback_setrate(rme32, params_rate(params))) < 0) {
  		spin_unlock_irq(&rme32->lock);
  		return err;
  	}
  	if ((rate = snd_rme32_capture_getrate(rme32, &isadat)) > 0) {
                  if ((int)params_rate(params) != rate) {
  			spin_unlock_irq(&rme32->lock);
                          return -EIO;                    
                  }
                  if ((isadat && runtime->hw.channels_min == 2) ||
                      (!isadat && runtime->hw.channels_min == 8)) {
  			spin_unlock_irq(&rme32->lock);
                          return -EIO;
                  }
  	}
  	/* AutoSync off for recording */
  	rme32->wcreg &= ~RME32_WCR_AUTOSYNC;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  
  	snd_rme32_setframelog(rme32, params_channels(params), 0);
  	if (rme32->playback_periodsize != 0) {
  		if (params_period_size(params) << rme32->capture_frlog !=
  		    rme32->playback_periodsize) {
  			spin_unlock_irq(&rme32->lock);
  			return -EBUSY;
  		}
  	}
  	rme32->capture_periodsize =
  	    params_period_size(params) << rme32->capture_frlog;
  	spin_unlock_irq(&rme32->lock);
  
  	return 0;
  }

  static int snd_rme32_pcm_hw_free(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	if (! rme32->fullduplex_mode)
  		return 0;
  	return snd_pcm_lib_free_pages(substream);
  }

  static void snd_rme32_pcm_start(struct rme32 * rme32, int from_pause)

  {
  	if (!from_pause) {
  		writel(0, rme32->iobase + RME32_IO_RESET_POS);
  	}
  
  	rme32->wcreg |= RME32_WCR_START;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  }

  static void snd_rme32_pcm_stop(struct rme32 * rme32, int to_pause)

  {
  	/*
  	 * Check if there is an unconfirmed IRQ, if so confirm it, or else
  	 * the hardware will not stop generating interrupts
  	 */
  	rme32->rcreg = readl(rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	if (rme32->rcreg & RME32_RCR_IRQ) {
  		writel(0, rme32->iobase + RME32_IO_CONFIRM_ACTION_IRQ);
  	}
  	rme32->wcreg &= ~RME32_WCR_START;
  	if (rme32->wcreg & RME32_WCR_SEL)
  		rme32->wcreg |= RME32_WCR_MUTE;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	if (! to_pause)
  		writel(0, rme32->iobase + RME32_IO_RESET_POS);
  }

  static irqreturn_t snd_rme32_interrupt(int irq, void *dev_id)

  {

  	struct rme32 *rme32 = (struct rme32 *) dev_id;

  
  	rme32->rcreg = readl(rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	if (!(rme32->rcreg & RME32_RCR_IRQ)) {
  		return IRQ_NONE;
  	} else {
  		if (rme32->capture_substream) {
  			snd_pcm_period_elapsed(rme32->capture_substream);
  		}
  		if (rme32->playback_substream) {
  			snd_pcm_period_elapsed(rme32->playback_substream);
  		}
  		writel(0, rme32->iobase + RME32_IO_CONFIRM_ACTION_IRQ);
  	}
  	return IRQ_HANDLED;
  }
  
  static unsigned int period_bytes[] = { RME32_BLOCK_SIZE };

  static struct snd_pcm_hw_constraint_list hw_constraints_period_bytes = {

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

  static void snd_rme32_set_buffer_constraint(struct rme32 *rme32, struct snd_pcm_runtime *runtime)

  {
  	if (! rme32->fullduplex_mode) {
  		snd_pcm_hw_constraint_minmax(runtime,
  					     SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
  					     RME32_BUFFER_SIZE, RME32_BUFFER_SIZE);
  		snd_pcm_hw_constraint_list(runtime, 0,
  					   SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
  					   &hw_constraints_period_bytes);
  	}
  }

  static int snd_rme32_playback_spdif_open(struct snd_pcm_substream *substream)

  {
  	int rate, dummy;

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  
  	snd_pcm_set_sync(substream);
  
  	spin_lock_irq(&rme32->lock);
  	if (rme32->playback_substream != NULL) {
  		spin_unlock_irq(&rme32->lock);
  		return -EBUSY;
  	}
  	rme32->wcreg &= ~RME32_WCR_ADAT;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	rme32->playback_substream = substream;
  	spin_unlock_irq(&rme32->lock);
  
  	if (rme32->fullduplex_mode)
  		runtime->hw = snd_rme32_spdif_fd_info;
  	else
  		runtime->hw = snd_rme32_spdif_info;

  	if (rme32->pci->device == PCI_DEVICE_ID_RME_DIGI32_PRO) {

  		runtime->hw.rates |= SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000;
  		runtime->hw.rate_max = 96000;
  	}
  	if ((rme32->rcreg & RME32_RCR_KMODE) &&
  	    (rate = snd_rme32_capture_getrate(rme32, &dummy)) > 0) {
  		/* AutoSync */
  		runtime->hw.rates = snd_rme32_ratecode(rate);
  		runtime->hw.rate_min = rate;
  		runtime->hw.rate_max = rate;
  	}       
  
  	snd_rme32_set_buffer_constraint(rme32, runtime);
  
  	rme32->wcreg_spdif_stream = rme32->wcreg_spdif;
  	rme32->spdif_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
  	snd_ctl_notify(rme32->card, SNDRV_CTL_EVENT_MASK_VALUE |
  		       SNDRV_CTL_EVENT_MASK_INFO, &rme32->spdif_ctl->id);
  	return 0;
  }

  static int snd_rme32_capture_spdif_open(struct snd_pcm_substream *substream)

  {
  	int isadat, rate;

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  
  	snd_pcm_set_sync(substream);
  
  	spin_lock_irq(&rme32->lock);
          if (rme32->capture_substream != NULL) {
  		spin_unlock_irq(&rme32->lock);
                  return -EBUSY;
          }
  	rme32->capture_substream = substream;
  	spin_unlock_irq(&rme32->lock);
  
  	if (rme32->fullduplex_mode)
  		runtime->hw = snd_rme32_spdif_fd_info;
  	else
  		runtime->hw = snd_rme32_spdif_info;
  	if (RME32_PRO_WITH_8414(rme32)) {
  		runtime->hw.rates |= SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000;
  		runtime->hw.rate_max = 96000;
  	}
  	if ((rate = snd_rme32_capture_getrate(rme32, &isadat)) > 0) {
  		if (isadat) {
  			return -EIO;
  		}
  		runtime->hw.rates = snd_rme32_ratecode(rate);
  		runtime->hw.rate_min = rate;
  		runtime->hw.rate_max = rate;
  	}
  
  	snd_rme32_set_buffer_constraint(rme32, runtime);
  
  	return 0;
  }
  
  static int

  snd_rme32_playback_adat_open(struct snd_pcm_substream *substream)

  {
  	int rate, dummy;

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  	
  	snd_pcm_set_sync(substream);
  
  	spin_lock_irq(&rme32->lock);	
          if (rme32->playback_substream != NULL) {
  		spin_unlock_irq(&rme32->lock);
                  return -EBUSY;
          }
  	rme32->wcreg |= RME32_WCR_ADAT;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	rme32->playback_substream = substream;
  	spin_unlock_irq(&rme32->lock);
  	
  	if (rme32->fullduplex_mode)
  		runtime->hw = snd_rme32_adat_fd_info;
  	else
  		runtime->hw = snd_rme32_adat_info;
  	if ((rme32->rcreg & RME32_RCR_KMODE) &&
  	    (rate = snd_rme32_capture_getrate(rme32, &dummy)) > 0) {
                  /* AutoSync */
                  runtime->hw.rates = snd_rme32_ratecode(rate);
                  runtime->hw.rate_min = rate;
                  runtime->hw.rate_max = rate;
  	}        
  
  	snd_rme32_set_buffer_constraint(rme32, runtime);
  	return 0;
  }
  
  static int

  snd_rme32_capture_adat_open(struct snd_pcm_substream *substream)

  {
  	int isadat, rate;

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
  	struct snd_pcm_runtime *runtime = substream->runtime;

  
  	if (rme32->fullduplex_mode)
  		runtime->hw = snd_rme32_adat_fd_info;
  	else
  		runtime->hw = snd_rme32_adat_info;
  	if ((rate = snd_rme32_capture_getrate(rme32, &isadat)) > 0) {
  		if (!isadat) {
  			return -EIO;
  		}
                  runtime->hw.rates = snd_rme32_ratecode(rate);
                  runtime->hw.rate_min = rate;
                  runtime->hw.rate_max = rate;
          }
  
  	snd_pcm_set_sync(substream);
          
  	spin_lock_irq(&rme32->lock);	
  	if (rme32->capture_substream != NULL) {
  		spin_unlock_irq(&rme32->lock);
  		return -EBUSY;
          }
  	rme32->capture_substream = substream;
  	spin_unlock_irq(&rme32->lock);
  
  	snd_rme32_set_buffer_constraint(rme32, runtime);
  	return 0;
  }

  static int snd_rme32_playback_close(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	int spdif = 0;
  
  	spin_lock_irq(&rme32->lock);
  	rme32->playback_substream = NULL;
  	rme32->playback_periodsize = 0;
  	spdif = (rme32->wcreg & RME32_WCR_ADAT) == 0;
  	spin_unlock_irq(&rme32->lock);
  	if (spdif) {
  		rme32->spdif_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
  		snd_ctl_notify(rme32->card, SNDRV_CTL_EVENT_MASK_VALUE |
  			       SNDRV_CTL_EVENT_MASK_INFO,
  			       &rme32->spdif_ctl->id);
  	}
  	return 0;
  }

  static int snd_rme32_capture_close(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  
  	spin_lock_irq(&rme32->lock);
  	rme32->capture_substream = NULL;
  	rme32->capture_periodsize = 0;
  	spin_unlock(&rme32->lock);
  	return 0;
  }

  static int snd_rme32_playback_prepare(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  
  	spin_lock_irq(&rme32->lock);
  	if (rme32->fullduplex_mode) {
  		memset(&rme32->playback_pcm, 0, sizeof(rme32->playback_pcm));
  		rme32->playback_pcm.hw_buffer_size = RME32_BUFFER_SIZE;
  		rme32->playback_pcm.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
  	} else {
  		writel(0, rme32->iobase + RME32_IO_RESET_POS);
  	}
  	if (rme32->wcreg & RME32_WCR_SEL)
  		rme32->wcreg &= ~RME32_WCR_MUTE;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	spin_unlock_irq(&rme32->lock);
  	return 0;
  }

  static int snd_rme32_capture_prepare(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  
  	spin_lock_irq(&rme32->lock);
  	if (rme32->fullduplex_mode) {
  		memset(&rme32->capture_pcm, 0, sizeof(rme32->capture_pcm));
  		rme32->capture_pcm.hw_buffer_size = RME32_BUFFER_SIZE;
  		rme32->capture_pcm.hw_queue_size = RME32_BUFFER_SIZE / 2;
  		rme32->capture_pcm.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
  	} else {
  		writel(0, rme32->iobase + RME32_IO_RESET_POS);
  	}
  	spin_unlock_irq(&rme32->lock);
  	return 0;
  }
  
  static int

  snd_rme32_pcm_trigger(struct snd_pcm_substream *substream, int cmd)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	struct snd_pcm_substream *s;

  
  	spin_lock(&rme32->lock);

  	snd_pcm_group_for_each_entry(s, substream) {

  		if (s != rme32->playback_substream &&
  		    s != rme32->capture_substream)
  			continue;
  		switch (cmd) {
  		case SNDRV_PCM_TRIGGER_START:
  			rme32->running |= (1 << s->stream);
  			if (rme32->fullduplex_mode) {
  				/* remember the current DMA position */
  				if (s == rme32->playback_substream) {
  					rme32->playback_pcm.hw_io =
  					rme32->playback_pcm.hw_data = snd_rme32_pcm_byteptr(rme32);
  				} else {
  					rme32->capture_pcm.hw_io =
  					rme32->capture_pcm.hw_data = snd_rme32_pcm_byteptr(rme32);
  				}
  			}
  			break;
  		case SNDRV_PCM_TRIGGER_STOP:
  			rme32->running &= ~(1 << s->stream);
  			break;
  		}
  		snd_pcm_trigger_done(s, substream);
  	}
  	
  	/* prefill playback buffer */
  	if (cmd == SNDRV_PCM_TRIGGER_START && rme32->fullduplex_mode) {

  		snd_pcm_group_for_each_entry(s, substream) {

  			if (s == rme32->playback_substream) {
  				s->ops->ack(s);
  				break;
  			}
  		}
  	}
  
  	switch (cmd) {
  	case SNDRV_PCM_TRIGGER_START:
  		if (rme32->running && ! RME32_ISWORKING(rme32))
  			snd_rme32_pcm_start(rme32, 0);
  		break;
  	case SNDRV_PCM_TRIGGER_STOP:
  		if (! rme32->running && RME32_ISWORKING(rme32))
  			snd_rme32_pcm_stop(rme32, 0);
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
  		if (rme32->running && RME32_ISWORKING(rme32))
  			snd_rme32_pcm_stop(rme32, 1);
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
  		if (rme32->running && ! RME32_ISWORKING(rme32))
  			snd_rme32_pcm_start(rme32, 1);
  		break;
  	}
  	spin_unlock(&rme32->lock);
  	return 0;
  }
  
  /* pointer callback for halfduplex mode */
  static snd_pcm_uframes_t

  snd_rme32_playback_pointer(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	return snd_rme32_pcm_byteptr(rme32) >> rme32->playback_frlog;
  }
  
  static snd_pcm_uframes_t

  snd_rme32_capture_pointer(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	return snd_rme32_pcm_byteptr(rme32) >> rme32->capture_frlog;
  }
  
  
  /* ack and pointer callbacks for fullduplex mode */

  static void snd_rme32_pb_trans_copy(struct snd_pcm_substream *substream,
  				    struct snd_pcm_indirect *rec, size_t bytes)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	memcpy_toio(rme32->iobase + RME32_IO_DATA_BUFFER + rec->hw_data,
  		    substream->runtime->dma_area + rec->sw_data, bytes);
  }

  static int snd_rme32_playback_fd_ack(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
  	struct snd_pcm_indirect *rec, *cprec;

  
  	rec = &rme32->playback_pcm;
  	cprec = &rme32->capture_pcm;
  	spin_lock(&rme32->lock);
  	rec->hw_queue_size = RME32_BUFFER_SIZE;
  	if (rme32->running & (1 << SNDRV_PCM_STREAM_CAPTURE))
  		rec->hw_queue_size -= cprec->hw_ready;
  	spin_unlock(&rme32->lock);
  	snd_pcm_indirect_playback_transfer(substream, rec,
  					   snd_rme32_pb_trans_copy);
  	return 0;
  }

  static void snd_rme32_cp_trans_copy(struct snd_pcm_substream *substream,
  				    struct snd_pcm_indirect *rec, size_t bytes)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	memcpy_fromio(substream->runtime->dma_area + rec->sw_data,
  		      rme32->iobase + RME32_IO_DATA_BUFFER + rec->hw_data,
  		      bytes);
  }

  static int snd_rme32_capture_fd_ack(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	snd_pcm_indirect_capture_transfer(substream, &rme32->capture_pcm,
  					  snd_rme32_cp_trans_copy);
  	return 0;
  }
  
  static snd_pcm_uframes_t

  snd_rme32_playback_fd_pointer(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	return snd_pcm_indirect_playback_pointer(substream, &rme32->playback_pcm,
  						 snd_rme32_pcm_byteptr(rme32));
  }
  
  static snd_pcm_uframes_t

  snd_rme32_capture_fd_pointer(struct snd_pcm_substream *substream)

  {

  	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

  	return snd_pcm_indirect_capture_pointer(substream, &rme32->capture_pcm,
  						snd_rme32_pcm_byteptr(rme32));
  }
  
  /* for halfduplex mode */

  static struct snd_pcm_ops snd_rme32_playback_spdif_ops = {

  	.open =		snd_rme32_playback_spdif_open,
  	.close =	snd_rme32_playback_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_playback_hw_params,
  	.hw_free =	snd_rme32_pcm_hw_free,
  	.prepare =	snd_rme32_playback_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_playback_pointer,
  	.copy =		snd_rme32_playback_copy,
  	.silence =	snd_rme32_playback_silence,
  	.mmap =		snd_pcm_lib_mmap_iomem,
  };

  static struct snd_pcm_ops snd_rme32_capture_spdif_ops = {

  	.open =		snd_rme32_capture_spdif_open,
  	.close =	snd_rme32_capture_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_capture_hw_params,
  	.hw_free =	snd_rme32_pcm_hw_free,
  	.prepare =	snd_rme32_capture_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_capture_pointer,
  	.copy =		snd_rme32_capture_copy,
  	.mmap =		snd_pcm_lib_mmap_iomem,
  };

  static struct snd_pcm_ops snd_rme32_playback_adat_ops = {

  	.open =		snd_rme32_playback_adat_open,
  	.close =	snd_rme32_playback_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_playback_hw_params,
  	.prepare =	snd_rme32_playback_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_playback_pointer,
  	.copy =		snd_rme32_playback_copy,
  	.silence =	snd_rme32_playback_silence,
  	.mmap =		snd_pcm_lib_mmap_iomem,
  };

  static struct snd_pcm_ops snd_rme32_capture_adat_ops = {

  	.open =		snd_rme32_capture_adat_open,
  	.close =	snd_rme32_capture_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_capture_hw_params,
  	.prepare =	snd_rme32_capture_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_capture_pointer,
  	.copy =		snd_rme32_capture_copy,
  	.mmap =		snd_pcm_lib_mmap_iomem,
  };
  
  /* for fullduplex mode */

  static struct snd_pcm_ops snd_rme32_playback_spdif_fd_ops = {

  	.open =		snd_rme32_playback_spdif_open,
  	.close =	snd_rme32_playback_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_playback_hw_params,
  	.hw_free =	snd_rme32_pcm_hw_free,
  	.prepare =	snd_rme32_playback_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_playback_fd_pointer,
  	.ack =		snd_rme32_playback_fd_ack,
  };

  static struct snd_pcm_ops snd_rme32_capture_spdif_fd_ops = {

  	.open =		snd_rme32_capture_spdif_open,
  	.close =	snd_rme32_capture_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_capture_hw_params,
  	.hw_free =	snd_rme32_pcm_hw_free,
  	.prepare =	snd_rme32_capture_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_capture_fd_pointer,
  	.ack =		snd_rme32_capture_fd_ack,
  };

  static struct snd_pcm_ops snd_rme32_playback_adat_fd_ops = {

  	.open =		snd_rme32_playback_adat_open,
  	.close =	snd_rme32_playback_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_playback_hw_params,
  	.prepare =	snd_rme32_playback_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_playback_fd_pointer,
  	.ack =		snd_rme32_playback_fd_ack,
  };

  static struct snd_pcm_ops snd_rme32_capture_adat_fd_ops = {

  	.open =		snd_rme32_capture_adat_open,
  	.close =	snd_rme32_capture_close,
  	.ioctl =	snd_pcm_lib_ioctl,
  	.hw_params =	snd_rme32_capture_hw_params,
  	.prepare =	snd_rme32_capture_prepare,
  	.trigger =	snd_rme32_pcm_trigger,
  	.pointer =	snd_rme32_capture_fd_pointer,
  	.ack =		snd_rme32_capture_fd_ack,
  };
  
  static void snd_rme32_free(void *private_data)
  {

  	struct rme32 *rme32 = (struct rme32 *) private_data;

  
  	if (rme32 == NULL) {
  		return;
  	}
  	if (rme32->irq >= 0) {
  		snd_rme32_pcm_stop(rme32, 0);
  		free_irq(rme32->irq, (void *) rme32);
  		rme32->irq = -1;
  	}
  	if (rme32->iobase) {
  		iounmap(rme32->iobase);
  		rme32->iobase = NULL;
  	}
  	if (rme32->port) {
  		pci_release_regions(rme32->pci);
  		rme32->port = 0;
  	}
  	pci_disable_device(rme32->pci);
  }

  static void snd_rme32_free_spdif_pcm(struct snd_pcm *pcm)

  {

  	struct rme32 *rme32 = (struct rme32 *) pcm->private_data;

  	rme32->spdif_pcm = NULL;
  }
  
  static void

  snd_rme32_free_adat_pcm(struct snd_pcm *pcm)

  {

  	struct rme32 *rme32 = (struct rme32 *) pcm->private_data;

  	rme32->adat_pcm = NULL;
  }

  static int __devinit snd_rme32_create(struct rme32 * rme32)

  {
  	struct pci_dev *pci = rme32->pci;
  	int err;
  
  	rme32->irq = -1;
  	spin_lock_init(&rme32->lock);
  
  	if ((err = pci_enable_device(pci)) < 0)
  		return err;
  
  	if ((err = pci_request_regions(pci, "RME32")) < 0)
  		return err;
  	rme32->port = pci_resource_start(rme32->pci, 0);

  	if ((rme32->iobase = ioremap_nocache(rme32->port, RME32_IO_SIZE)) == 0) {

  		snd_printk(KERN_ERR "unable to remap memory region 0x%lx-0x%lx
  ",

  			   rme32->port, rme32->port + RME32_IO_SIZE - 1);
  		return -ENOMEM;
  	}

  	if (request_irq(pci->irq, snd_rme32_interrupt, IRQF_SHARED,
  			"RME32", rme32)) {

  		snd_printk(KERN_ERR "unable to grab IRQ %d
  ", pci->irq);
  		return -EBUSY;
  	}
  	rme32->irq = pci->irq;

  	/* read the card's revision number */
  	pci_read_config_byte(pci, 8, &rme32->rev);
  
  	/* set up ALSA pcm device for S/PDIF */
  	if ((err = snd_pcm_new(rme32->card, "Digi32 IEC958", 0, 1, 1, &rme32->spdif_pcm)) < 0) {
  		return err;
  	}
  	rme32->spdif_pcm->private_data = rme32;
  	rme32->spdif_pcm->private_free = snd_rme32_free_spdif_pcm;
  	strcpy(rme32->spdif_pcm->name, "Digi32 IEC958");
  	if (rme32->fullduplex_mode) {
  		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_PLAYBACK,
  				&snd_rme32_playback_spdif_fd_ops);
  		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_CAPTURE,
  				&snd_rme32_capture_spdif_fd_ops);
  		snd_pcm_lib_preallocate_pages_for_all(rme32->spdif_pcm, SNDRV_DMA_TYPE_CONTINUOUS,
  						      snd_dma_continuous_data(GFP_KERNEL),
  						      0, RME32_MID_BUFFER_SIZE);
  		rme32->spdif_pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
  	} else {
  		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_PLAYBACK,
  				&snd_rme32_playback_spdif_ops);
  		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_CAPTURE,
  				&snd_rme32_capture_spdif_ops);
  		rme32->spdif_pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
  	}
  
  	/* set up ALSA pcm device for ADAT */

  	if ((pci->device == PCI_DEVICE_ID_RME_DIGI32) ||
  	    (pci->device == PCI_DEVICE_ID_RME_DIGI32_PRO)) {

  		/* ADAT is not available on DIGI32 and DIGI32 Pro */
  		rme32->adat_pcm = NULL;
  	}
  	else {
  		if ((err = snd_pcm_new(rme32->card, "Digi32 ADAT", 1,
  				       1, 1, &rme32->adat_pcm)) < 0)
  		{
  			return err;
  		}		
  		rme32->adat_pcm->private_data = rme32;
  		rme32->adat_pcm->private_free = snd_rme32_free_adat_pcm;
  		strcpy(rme32->adat_pcm->name, "Digi32 ADAT");
  		if (rme32->fullduplex_mode) {
  			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_PLAYBACK, 
  					&snd_rme32_playback_adat_fd_ops);
  			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_CAPTURE, 
  					&snd_rme32_capture_adat_fd_ops);
  			snd_pcm_lib_preallocate_pages_for_all(rme32->adat_pcm, SNDRV_DMA_TYPE_CONTINUOUS,
  							      snd_dma_continuous_data(GFP_KERNEL),
  							      0, RME32_MID_BUFFER_SIZE);
  			rme32->adat_pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
  		} else {
  			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_PLAYBACK, 
  					&snd_rme32_playback_adat_ops);
  			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_CAPTURE, 
  					&snd_rme32_capture_adat_ops);
  			rme32->adat_pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
  		}
  	}
  
  
  	rme32->playback_periodsize = 0;
  	rme32->capture_periodsize = 0;
  
  	/* make sure playback/capture is stopped, if by some reason active */
  	snd_rme32_pcm_stop(rme32, 0);
  
          /* reset DAC */
          snd_rme32_reset_dac(rme32);
  
  	/* reset buffer pointer */
  	writel(0, rme32->iobase + RME32_IO_RESET_POS);
  
  	/* set default values in registers */
  	rme32->wcreg = RME32_WCR_SEL |	 /* normal playback */
  		RME32_WCR_INP_0 | /* input select */
  		RME32_WCR_MUTE;	 /* muting on */
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  
  
  	/* init switch interface */
  	if ((err = snd_rme32_create_switches(rme32->card, rme32)) < 0) {
  		return err;
  	}
  
  	/* init proc interface */
  	snd_rme32_proc_init(rme32);
  
  	rme32->capture_substream = NULL;
  	rme32->playback_substream = NULL;
  
  	return 0;
  }
  
  /*
   * proc interface
   */
  
  static void

  snd_rme32_proc_read(struct snd_info_entry * entry, struct snd_info_buffer *buffer)

  {
  	int n;

  	struct rme32 *rme32 = (struct rme32 *) entry->private_data;

  
  	rme32->rcreg = readl(rme32->iobase + RME32_IO_CONTROL_REGISTER);
  
  	snd_iprintf(buffer, rme32->card->longname);
  	snd_iprintf(buffer, " (index #%d)
  ", rme32->card->number + 1);
  
  	snd_iprintf(buffer, "
  General settings
  ");
  	if (rme32->fullduplex_mode)
  		snd_iprintf(buffer, "  Full-duplex mode
  ");
  	else
  		snd_iprintf(buffer, "  Half-duplex mode
  ");
  	if (RME32_PRO_WITH_8414(rme32)) {
  		snd_iprintf(buffer, "  receiver: CS8414
  ");
  	} else {
  		snd_iprintf(buffer, "  receiver: CS8412
  ");
  	}
  	if (rme32->wcreg & RME32_WCR_MODE24) {
  		snd_iprintf(buffer, "  format: 24 bit");
  	} else {
  		snd_iprintf(buffer, "  format: 16 bit");
  	}
  	if (rme32->wcreg & RME32_WCR_MONO) {
  		snd_iprintf(buffer, ", Mono
  ");
  	} else {
  		snd_iprintf(buffer, ", Stereo
  ");
  	}
  
  	snd_iprintf(buffer, "
  Input settings
  ");
  	switch (snd_rme32_getinputtype(rme32)) {
  	case RME32_INPUT_OPTICAL:
  		snd_iprintf(buffer, "  input: optical");
  		break;
  	case RME32_INPUT_COAXIAL:
  		snd_iprintf(buffer, "  input: coaxial");
  		break;
  	case RME32_INPUT_INTERNAL:
  		snd_iprintf(buffer, "  input: internal");
  		break;
  	case RME32_INPUT_XLR:
  		snd_iprintf(buffer, "  input: XLR");
  		break;
  	}
  	if (snd_rme32_capture_getrate(rme32, &n) < 0) {
  		snd_iprintf(buffer, "
    sample rate: no valid signal
  ");
  	} else {
  		if (n) {
  			snd_iprintf(buffer, " (8 channels)
  ");
  		} else {
  			snd_iprintf(buffer, " (2 channels)
  ");
  		}
  		snd_iprintf(buffer, "  sample rate: %d Hz
  ",
  			    snd_rme32_capture_getrate(rme32, &n));
  	}
  
  	snd_iprintf(buffer, "
  Output settings
  ");
  	if (rme32->wcreg & RME32_WCR_SEL) {
  		snd_iprintf(buffer, "  output signal: normal playback");
  	} else {
  		snd_iprintf(buffer, "  output signal: same as input");
  	}
  	if (rme32->wcreg & RME32_WCR_MUTE) {
  		snd_iprintf(buffer, " (muted)
  ");
  	} else {
  		snd_iprintf(buffer, "
  ");
  	}
  
  	/* master output frequency */
  	if (!
  	    ((!(rme32->wcreg & RME32_WCR_FREQ_0))
  	     && (!(rme32->wcreg & RME32_WCR_FREQ_1)))) {
  		snd_iprintf(buffer, "  sample rate: %d Hz
  ",
  			    snd_rme32_playback_getrate(rme32));
  	}
  	if (rme32->rcreg & RME32_RCR_KMODE) {
  		snd_iprintf(buffer, "  sample clock source: AutoSync
  ");
  	} else {
  		snd_iprintf(buffer, "  sample clock source: Internal
  ");
  	}
  	if (rme32->wcreg & RME32_WCR_PRO) {
  		snd_iprintf(buffer, "  format: AES/EBU (professional)
  ");
  	} else {
  		snd_iprintf(buffer, "  format: IEC958 (consumer)
  ");
  	}
  	if (rme32->wcreg & RME32_WCR_EMP) {
  		snd_iprintf(buffer, "  emphasis: on
  ");
  	} else {
  		snd_iprintf(buffer, "  emphasis: off
  ");
  	}
  }

  static void __devinit snd_rme32_proc_init(struct rme32 * rme32)

  {

  	struct snd_info_entry *entry;

  
  	if (! snd_card_proc_new(rme32->card, "rme32", &entry))

  		snd_info_set_text_ops(entry, rme32, snd_rme32_proc_read);

  }
  
  /*
   * control interface
   */
  
  static int

  snd_rme32_info_loopback_control(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
  	uinfo->count = 1;
  	uinfo->value.integer.min = 0;
  	uinfo->value.integer.max = 1;
  	return 0;
  }
  static int

  snd_rme32_get_loopback_control(struct snd_kcontrol *kcontrol,
  			       struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  
  	spin_lock_irq(&rme32->lock);
  	ucontrol->value.integer.value[0] =
  	    rme32->wcreg & RME32_WCR_SEL ? 0 : 1;
  	spin_unlock_irq(&rme32->lock);
  	return 0;
  }
  static int

  snd_rme32_put_loopback_control(struct snd_kcontrol *kcontrol,
  			       struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  	unsigned int val;
  	int change;
  
  	val = ucontrol->value.integer.value[0] ? 0 : RME32_WCR_SEL;
  	spin_lock_irq(&rme32->lock);
  	val = (rme32->wcreg & ~RME32_WCR_SEL) | val;
  	change = val != rme32->wcreg;
  	if (ucontrol->value.integer.value[0])
  		val &= ~RME32_WCR_MUTE;
  	else
  		val |= RME32_WCR_MUTE;
  	rme32->wcreg = val;
  	writel(val, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	spin_unlock_irq(&rme32->lock);
  	return change;
  }
  
  static int

  snd_rme32_info_inputtype_control(struct snd_kcontrol *kcontrol,
  				 struct snd_ctl_elem_info *uinfo)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  	static char *texts[4] = { "Optical", "Coaxial", "Internal", "XLR" };
  
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  	uinfo->count = 1;
  	switch (rme32->pci->device) {

  	case PCI_DEVICE_ID_RME_DIGI32:
  	case PCI_DEVICE_ID_RME_DIGI32_8:

  		uinfo->value.enumerated.items = 3;
  		break;

  	case PCI_DEVICE_ID_RME_DIGI32_PRO:

  		uinfo->value.enumerated.items = 4;
  		break;
  	default:
  		snd_BUG();
  		break;
  	}
  	if (uinfo->value.enumerated.item >
  	    uinfo->value.enumerated.items - 1) {
  		uinfo->value.enumerated.item =
  		    uinfo->value.enumerated.items - 1;
  	}
  	strcpy(uinfo->value.enumerated.name,
  	       texts[uinfo->value.enumerated.item]);
  	return 0;
  }
  static int

  snd_rme32_get_inputtype_control(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  	unsigned int items = 3;
  
  	spin_lock_irq(&rme32->lock);
  	ucontrol->value.enumerated.item[0] = snd_rme32_getinputtype(rme32);
  
  	switch (rme32->pci->device) {

  	case PCI_DEVICE_ID_RME_DIGI32:
  	case PCI_DEVICE_ID_RME_DIGI32_8:

  		items = 3;
  		break;

  	case PCI_DEVICE_ID_RME_DIGI32_PRO:

  		items = 4;
  		break;
  	default:
  		snd_BUG();
  		break;
  	}
  	if (ucontrol->value.enumerated.item[0] >= items) {
  		ucontrol->value.enumerated.item[0] = items - 1;
  	}
  
  	spin_unlock_irq(&rme32->lock);
  	return 0;
  }
  static int

  snd_rme32_put_inputtype_control(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  	unsigned int val;
  	int change, items = 3;
  
  	switch (rme32->pci->device) {

  	case PCI_DEVICE_ID_RME_DIGI32:
  	case PCI_DEVICE_ID_RME_DIGI32_8:

  		items = 3;
  		break;

  	case PCI_DEVICE_ID_RME_DIGI32_PRO:

  		items = 4;
  		break;
  	default:
  		snd_BUG();
  		break;
  	}
  	val = ucontrol->value.enumerated.item[0] % items;
  
  	spin_lock_irq(&rme32->lock);
  	change = val != (unsigned int)snd_rme32_getinputtype(rme32);
  	snd_rme32_setinputtype(rme32, val);
  	spin_unlock_irq(&rme32->lock);
  	return change;
  }
  
  static int

  snd_rme32_info_clockmode_control(struct snd_kcontrol *kcontrol,
  				 struct snd_ctl_elem_info *uinfo)

  {
  	static char *texts[4] = { "AutoSync", 
  				  "Internal 32.0kHz", 
  				  "Internal 44.1kHz", 
  				  "Internal 48.0kHz" };
  
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  	uinfo->count = 1;
  	uinfo->value.enumerated.items = 4;
  	if (uinfo->value.enumerated.item > 3) {
  		uinfo->value.enumerated.item = 3;
  	}
  	strcpy(uinfo->value.enumerated.name,
  	       texts[uinfo->value.enumerated.item]);
  	return 0;
  }
  static int

  snd_rme32_get_clockmode_control(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  
  	spin_lock_irq(&rme32->lock);
  	ucontrol->value.enumerated.item[0] = snd_rme32_getclockmode(rme32);
  	spin_unlock_irq(&rme32->lock);
  	return 0;
  }
  static int

  snd_rme32_put_clockmode_control(struct snd_kcontrol *kcontrol,
  				struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  	unsigned int val;
  	int change;
  
  	val = ucontrol->value.enumerated.item[0] % 3;
  	spin_lock_irq(&rme32->lock);
  	change = val != (unsigned int)snd_rme32_getclockmode(rme32);
  	snd_rme32_setclockmode(rme32, val);
  	spin_unlock_irq(&rme32->lock);
  	return change;
  }

  static u32 snd_rme32_convert_from_aes(struct snd_aes_iec958 * aes)

  {
  	u32 val = 0;
  	val |= (aes->status[0] & IEC958_AES0_PROFESSIONAL) ? RME32_WCR_PRO : 0;
  	if (val & RME32_WCR_PRO)
  		val |= (aes->status[0] & IEC958_AES0_PRO_EMPHASIS_5015) ? RME32_WCR_EMP : 0;
  	else
  		val |= (aes->status[0] & IEC958_AES0_CON_EMPHASIS_5015) ? RME32_WCR_EMP : 0;
  	return val;
  }

  static void snd_rme32_convert_to_aes(struct snd_aes_iec958 * aes, u32 val)

  {
  	aes->status[0] = ((val & RME32_WCR_PRO) ? IEC958_AES0_PROFESSIONAL : 0);
  	if (val & RME32_WCR_PRO)
  		aes->status[0] |= (val & RME32_WCR_EMP) ? IEC958_AES0_PRO_EMPHASIS_5015 : 0;
  	else
  		aes->status[0] |= (val & RME32_WCR_EMP) ? IEC958_AES0_CON_EMPHASIS_5015 : 0;
  }

  static int snd_rme32_control_spdif_info(struct snd_kcontrol *kcontrol,
  					struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
  	uinfo->count = 1;
  	return 0;
  }

  static int snd_rme32_control_spdif_get(struct snd_kcontrol *kcontrol,
  				       struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  
  	snd_rme32_convert_to_aes(&ucontrol->value.iec958,
  				 rme32->wcreg_spdif);
  	return 0;
  }

  static int snd_rme32_control_spdif_put(struct snd_kcontrol *kcontrol,
  				       struct snd_ctl_elem_value *ucontrol)

  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  	int change;
  	u32 val;
  
  	val = snd_rme32_convert_from_aes(&ucontrol->value.iec958);
  	spin_lock_irq(&rme32->lock);
  	change = val != rme32->wcreg_spdif;
  	rme32->wcreg_spdif = val;
  	spin_unlock_irq(&rme32->lock);
  	return change;
  }

  static int snd_rme32_control_spdif_stream_info(struct snd_kcontrol *kcontrol,
  					       struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
  	uinfo->count = 1;
  	return 0;
  }

  static int snd_rme32_control_spdif_stream_get(struct snd_kcontrol *kcontrol,
  					      struct snd_ctl_elem_value *

  					      ucontrol)
  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  
  	snd_rme32_convert_to_aes(&ucontrol->value.iec958,
  				 rme32->wcreg_spdif_stream);
  	return 0;
  }

  static int snd_rme32_control_spdif_stream_put(struct snd_kcontrol *kcontrol,
  					      struct snd_ctl_elem_value *

  					      ucontrol)
  {

  	struct rme32 *rme32 = snd_kcontrol_chip(kcontrol);

  	int change;
  	u32 val;
  
  	val = snd_rme32_convert_from_aes(&ucontrol->value.iec958);
  	spin_lock_irq(&rme32->lock);
  	change = val != rme32->wcreg_spdif_stream;
  	rme32->wcreg_spdif_stream = val;
  	rme32->wcreg &= ~(RME32_WCR_PRO | RME32_WCR_EMP);
  	rme32->wcreg |= val;
  	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
  	spin_unlock_irq(&rme32->lock);
  	return change;
  }

  static int snd_rme32_control_spdif_mask_info(struct snd_kcontrol *kcontrol,
  					     struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
  	uinfo->count = 1;
  	return 0;
  }

  static int snd_rme32_control_spdif_mask_get(struct snd_kcontrol *kcontrol,
  					    struct snd_ctl_elem_value *

  					    ucontrol)
  {
  	ucontrol->value.iec958.status[0] = kcontrol->private_value;
  	return 0;
  }

  static struct snd_kcontrol_new snd_rme32_controls[] = {

  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
  		.name =	SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
  		.info =	snd_rme32_control_spdif_info,
  		.get =	snd_rme32_control_spdif_get,
  		.put =	snd_rme32_control_spdif_put
  	},
  	{
  		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
  		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
  		.name =	SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
  		.info =	snd_rme32_control_spdif_stream_info,
  		.get =	snd_rme32_control_spdif_stream_get,
  		.put =	snd_rme32_control_spdif_stream_put
  	},
  	{
  		.access = SNDRV_CTL_ELEM_ACCESS_READ,

  		.iface = SNDRV_CTL_ELEM_IFACE_PCM,

  		.name =	SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
  		.info =	snd_rme32_control_spdif_mask_info,
  		.get =	snd_rme32_control_spdif_mask_get,
  		.private_value = IEC958_AES0_PROFESSIONAL | IEC958_AES0_CON_EMPHASIS
  	},
  	{
  		.access = SNDRV_CTL_ELEM_ACCESS_READ,

  		.iface = SNDRV_CTL_ELEM_IFACE_PCM,

  		.name =	SNDRV_CTL_NAME_IEC958("", PLAYBACK, PRO_MASK),
  		.info =	snd_rme32_control_spdif_mask_info,
  		.get =	snd_rme32_control_spdif_mask_get,
  		.private_value = IEC958_AES0_PROFESSIONAL | IEC958_AES0_PRO_EMPHASIS
  	},
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name =	"Input Connector",
  		.info =	snd_rme32_info_inputtype_control,
  		.get =	snd_rme32_get_inputtype_control,
  		.put =	snd_rme32_put_inputtype_control
  	},
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name =	"Loopback Input",
  		.info =	snd_rme32_info_loopback_control,
  		.get =	snd_rme32_get_loopback_control,
  		.put =	snd_rme32_put_loopback_control
  	},
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name =	"Sample Clock Source",
  		.info =	snd_rme32_info_clockmode_control,
  		.get =	snd_rme32_get_clockmode_control,
  		.put =	snd_rme32_put_clockmode_control
  	}
  };

  static int snd_rme32_create_switches(struct snd_card *card, struct rme32 * rme32)

  {
  	int idx, err;

  	struct snd_kcontrol *kctl;

  
  	for (idx = 0; idx < (int)ARRAY_SIZE(snd_rme32_controls); idx++) {
  		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_rme32_controls[idx], rme32))) < 0)
  			return err;
  		if (idx == 1)	/* IEC958 (S/PDIF) Stream */
  			rme32->spdif_ctl = kctl;
  	}
  
  	return 0;
  }
  
  /*
   * Card initialisation
   */

  static void snd_rme32_card_free(struct snd_card *card)

  {
  	snd_rme32_free(card->private_data);
  }
  
  static int __devinit
  snd_rme32_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
  {
  	static int dev;

  	struct rme32 *rme32;
  	struct snd_card *card;

  	int err;
  
  	if (dev >= SNDRV_CARDS) {
  		return -ENODEV;
  	}
  	if (!enable[dev]) {
  		dev++;
  		return -ENOENT;
  	}
  
  	if ((card = snd_card_new(index[dev], id[dev], THIS_MODULE,

  				 sizeof(struct rme32))) == NULL)

  		return -ENOMEM;
  	card->private_free = snd_rme32_card_free;

  	rme32 = (struct rme32 *) card->private_data;

  	rme32->card = card;
  	rme32->pci = pci;
  	snd_card_set_dev(card, &pci->dev);
          if (fullduplex[dev])
  		rme32->fullduplex_mode = 1;
  	if ((err = snd_rme32_create(rme32)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  
  	strcpy(card->driver, "Digi32");
  	switch (rme32->pci->device) {

  	case PCI_DEVICE_ID_RME_DIGI32:

  		strcpy(card->shortname, "RME Digi32");
  		break;

  	case PCI_DEVICE_ID_RME_DIGI32_8:

  		strcpy(card->shortname, "RME Digi32/8");
  		break;

  	case PCI_DEVICE_ID_RME_DIGI32_PRO:

  		strcpy(card->shortname, "RME Digi32 PRO");
  		break;
  	}
  	sprintf(card->longname, "%s (Rev. %d) at 0x%lx, irq %d",
  		card->shortname, rme32->rev, rme32->port, rme32->irq);
  
  	if ((err = snd_card_register(card)) < 0) {
  		snd_card_free(card);
  		return err;
  	}
  	pci_set_drvdata(pci, card);
  	dev++;
  	return 0;
  }
  
  static void __devexit snd_rme32_remove(struct pci_dev *pci)
  {
  	snd_card_free(pci_get_drvdata(pci));
  	pci_set_drvdata(pci, NULL);
  }
  
  static struct pci_driver driver = {
  	.name =		"RME Digi32",
  	.id_table =	snd_rme32_ids,
  	.probe =	snd_rme32_probe,
  	.remove =	__devexit_p(snd_rme32_remove),
  };
  
  static int __init alsa_card_rme32_init(void)
  {

  	return pci_register_driver(&driver);

  }
  
  static void __exit alsa_card_rme32_exit(void)
  {
  	pci_unregister_driver(&driver);
  }
  
  module_init(alsa_card_rme32_init)
  module_exit(alsa_card_rme32_exit)