diff --git a/sound/oss/pas2_mixer.c b/sound/oss/pas2_mixer.c
new file mode 100644
index 0000000..4aade53
--- /dev/null
+++ b/sound/oss/pas2_mixer.c
@@ -0,0 +1,336 @@
+
+/*
+ * sound/pas2_mixer.c
+ *
+ * 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"
+
+#ifndef DEB
+#define DEB(what)		/* (what) */
+#endif
+
+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;
+
+	DEB(printk("static int pas_mixer_set(int whichDev = %d, unsigned int level = %X)\n", whichDev, level));
+
+	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;
+
+	DEB(printk("pas2_mixer.c: void pas_mixer_reset(void)\n"));
+
+	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;
+
+	DEB(printk("pas2_mixer.c: int pas_mixer_ioctl(unsigned int cmd = %X, unsigned int arg = %X)\n", cmd, arg));
+	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;
+}