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sound/oss/pas2_mixer.c 7.84 KB
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1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  /*
f30c22695   Uwe Zeisberger   fix file specific... 
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   * sound/oss/pas2_mixer.c
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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   *
   * Mixer routines for the Pro Audio Spectrum cards.
   */
  
  /*
   * Copyright (C) by Hannu Savolainen 1993-1997
   *
   * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
   * Version 2 (June 1991). See the "COPYING" file distributed with this software
   * for more info.
   */
  /*
   * Thomas Sailer   : ioctl code reworked (vmalloc/vfree removed)
   * Bartlomiej Zolnierkiewicz : added __init to pas_init_mixer()
   */
  #include <linux/init.h>
  #include "sound_config.h"
  
  #include "pas2.h"
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  extern int      pas_translate_code;
  extern char     pas_model;
  extern int     *pas_osp;
  extern int      pas_audiodev;
  
  static int      rec_devices = (SOUND_MASK_MIC);		/* Default recording source */
  static int      mode_control;
  
  #define POSSIBLE_RECORDING_DEVICES	(SOUND_MASK_SYNTH | SOUND_MASK_SPEAKER | SOUND_MASK_LINE | SOUND_MASK_MIC | \
  					 SOUND_MASK_CD | SOUND_MASK_ALTPCM)
  
  #define SUPPORTED_MIXER_DEVICES		(SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_SPEAKER | SOUND_MASK_LINE | SOUND_MASK_MIC | \
  					 SOUND_MASK_CD | SOUND_MASK_ALTPCM | SOUND_MASK_IMIX | \
  					 SOUND_MASK_VOLUME | SOUND_MASK_BASS | SOUND_MASK_TREBLE | SOUND_MASK_RECLEV)
  
  static int     *levels;
  
  static int      default_levels[32] =
  {
  	0x3232,			/* Master Volume */
  	0x3232,			/* Bass */
  	0x3232,			/* Treble */
  	0x5050,			/* FM */
  	0x4b4b,			/* PCM */
  	0x3232,			/* PC Speaker */
  	0x4b4b,			/* Ext Line */
  	0x4b4b,			/* Mic */
  	0x4b4b,			/* CD */
  	0x6464,			/* Recording monitor */
  	0x4b4b,			/* SB PCM */
  	0x6464			/* Recording level */
  };
  
  void
  mix_write(unsigned char data, int ioaddr)
  {
  	/*
  	 * The Revision D cards have a problem with their MVA508 interface. The
  	 * kludge-o-rama fix is to make a 16-bit quantity with identical LSB and
  	 * MSBs out of the output byte and to do a 16-bit out to the mixer port -
  	 * 1. We need to do this because it isn't timing problem but chip access
  	 * sequence problem.
  	 */
  
  	if (pas_model == 4)
  	  {
  		  outw(data | (data << 8), (ioaddr + pas_translate_code) - 1);
  		  outb((0x80), 0);
  	} else
  		pas_write(data, ioaddr);
  }
  
  static int
  mixer_output(int right_vol, int left_vol, int div, int bits,
  	     int mixer)		/* Input or output mixer */
  {
  	int             left = left_vol * div / 100;
  	int             right = right_vol * div / 100;
  
  
  	if (bits & 0x10)
  	  {
  		  left |= mixer;
  		  right |= mixer;
  	  }
  	if (bits == 0x03 || bits == 0x04)
  	  {
  		  mix_write(0x80 | bits, 0x078B);
  		  mix_write(left, 0x078B);
  		  right_vol = left_vol;
  	} else
  	  {
  		  mix_write(0x80 | 0x20 | bits, 0x078B);
  		  mix_write(left, 0x078B);
  		  mix_write(0x80 | 0x40 | bits, 0x078B);
  		  mix_write(right, 0x078B);
  	  }
  
  	return (left_vol | (right_vol << 8));
  }
  
  static void
  set_mode(int new_mode)
  {
  	mix_write(0x80 | 0x05, 0x078B);
  	mix_write(new_mode, 0x078B);
  
  	mode_control = new_mode;
  }
  
  static int
  pas_mixer_set(int whichDev, unsigned int level)
  {
  	int             left, right, devmask, changed, i, mixer = 0;
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  	left = level & 0x7f;
  	right = (level & 0x7f00) >> 8;
  
  	if (whichDev < SOUND_MIXER_NRDEVICES) {
  		if ((1 << whichDev) & rec_devices)
  			mixer = 0x20;
  		else
  			mixer = 0x00;
  	}
  
  	switch (whichDev)
  	  {
  	  case SOUND_MIXER_VOLUME:	/* Master volume (0-63) */
  		  levels[whichDev] = mixer_output(right, left, 63, 0x01, 0);
  		  break;
  
  		  /*
  		   * Note! Bass and Treble are mono devices. Will use just the left
  		   * channel.
  		   */
  	  case SOUND_MIXER_BASS:	/* Bass (0-12) */
  		  levels[whichDev] = mixer_output(right, left, 12, 0x03, 0);
  		  break;
  	  case SOUND_MIXER_TREBLE:	/* Treble (0-12) */
  		  levels[whichDev] = mixer_output(right, left, 12, 0x04, 0);
  		  break;
  
  	  case SOUND_MIXER_SYNTH:	/* Internal synthesizer (0-31) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x00, mixer);
  		  break;
  	  case SOUND_MIXER_PCM:	/* PAS PCM (0-31) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x05, mixer);
  		  break;
  	  case SOUND_MIXER_ALTPCM:	/* SB PCM (0-31) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x07, mixer);
  		  break;
  	  case SOUND_MIXER_SPEAKER:	/* PC speaker (0-31) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x06, mixer);
  		  break;
  	  case SOUND_MIXER_LINE:	/* External line (0-31) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x02, mixer);
  		  break;
  	  case SOUND_MIXER_CD:	/* CD (0-31) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x03, mixer);
  		  break;
  	  case SOUND_MIXER_MIC:	/* External microphone (0-31) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x04, mixer);
  		  break;
  	  case SOUND_MIXER_IMIX:	/* Recording monitor (0-31) (Output mixer only) */
  		  levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x01,
  						  0x00);
  		  break;
  	  case SOUND_MIXER_RECLEV:	/* Recording level (0-15) */
  		  levels[whichDev] = mixer_output(right, left, 15, 0x02, 0);
  		  break;
  
  
  	  case SOUND_MIXER_RECSRC:
  		  devmask = level & POSSIBLE_RECORDING_DEVICES;
  
  		  changed = devmask ^ rec_devices;
  		  rec_devices = devmask;
  
  		  for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  			  if (changed & (1 << i))
  			    {
  				    pas_mixer_set(i, levels[i]);
  			    }
  		  return rec_devices;
  		  break;
  
  	  default:
  		  return -EINVAL;
  	  }
  
  	return (levels[whichDev]);
  }
  
  /*****/
  
  static void
  pas_mixer_reset(void)
  {
  	int             foo;
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  	for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
  		pas_mixer_set(foo, levels[foo]);
  
  	set_mode(0x04 | 0x01);
  }
  
  static int pas_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
  {
  	int level,v ;
  	int __user *p = (int __user *)arg;
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  	if (cmd == SOUND_MIXER_PRIVATE1) { /* Set loudness bit */
  		if (get_user(level, p))
  			return -EFAULT;
  		if (level == -1)  /* Return current settings */
  			level = (mode_control & 0x04);
  		else {
  			mode_control &= ~0x04;
  			if (level)
  				mode_control |= 0x04;
  			set_mode(mode_control);
  		}
  		level = !!level;
  		return put_user(level, p);
  	}
  	if (cmd == SOUND_MIXER_PRIVATE2) { /* Set enhance bit */
  		if (get_user(level, p))
  			return -EFAULT;
  		if (level == -1) { /* Return current settings */
  			if (!(mode_control & 0x03))
  				level = 0;
  			else
  				level = ((mode_control & 0x03) + 1) * 20;
  		} else {
  			int i = 0;
  			
  			level &= 0x7f;
  			if (level)
  				i = (level / 20) - 1;
  			mode_control &= ~0x03;
  			mode_control |= i & 0x03;
  			set_mode(mode_control);
  			if (i)
  				i = (i + 1) * 20;
  			level = i;
  		}
  		return put_user(level, p);
  	}
  	if (cmd == SOUND_MIXER_PRIVATE3) { /* Set mute bit */
  		if (get_user(level, p))
  			return -EFAULT;
  		if (level == -1)	/* Return current settings */
  			level = !(pas_read(0x0B8A) & 0x20);
  		else {
  			if (level)
  				pas_write(pas_read(0x0B8A) & (~0x20), 0x0B8A);
  			else
  				pas_write(pas_read(0x0B8A) | 0x20, 0x0B8A);
  
  			level = !(pas_read(0x0B8A) & 0x20);
  		}
  		return put_user(level, p);
  	}
  	if (((cmd >> 8) & 0xff) == 'M') {
  		if (get_user(v, p))
  			return -EFAULT;
  		if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
  			v = pas_mixer_set(cmd & 0xff, v);
  		} else {
  			switch (cmd & 0xff) {
  			case SOUND_MIXER_RECSRC:
  				v = rec_devices;
  				break;
  				
  			case SOUND_MIXER_STEREODEVS:
  				v = SUPPORTED_MIXER_DEVICES & ~(SOUND_MASK_BASS | SOUND_MASK_TREBLE);
  				break;
  				
  			case SOUND_MIXER_DEVMASK:
  				v = SUPPORTED_MIXER_DEVICES;
  				break;
  				
  			case SOUND_MIXER_RECMASK:
  				v = POSSIBLE_RECORDING_DEVICES & SUPPORTED_MIXER_DEVICES;
  				break;
  				
  			case SOUND_MIXER_CAPS:
  				v = 0;	/* No special capabilities */
  				break;
  				
  			default:
  				v = levels[cmd & 0xff];
  				break;
  			}
  		}
  		return put_user(v, p);
  	}
  	return -EINVAL;
  }
  
  static struct mixer_operations pas_mixer_operations =
  {
  	.owner	= THIS_MODULE,
  	.id	= "PAS16",
  	.name	= "Pro Audio Spectrum 16",
  	.ioctl	= pas_mixer_ioctl
  };
  
  int __init
  pas_init_mixer(void)
  {
  	int             d;
  
  	levels = load_mixer_volumes("PAS16_1", default_levels, 1);
  
  	pas_mixer_reset();
  
  	if ((d = sound_alloc_mixerdev()) != -1)
  	  {
  		  audio_devs[pas_audiodev]->mixer_dev = d;
  		  mixer_devs[d] = &pas_mixer_operations;
  	  }
  	return 1;
  }