patch-2.2.13 linux/drivers/sound/cmpci.c

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diff -u --recursive --new-file v2.2.12/linux/drivers/sound/cmpci.c linux/drivers/sound/cmpci.c
@@ -0,0 +1,2392 @@
+/*****************************************************************************/
+
+/*
+ *      cmpci.c  --  C-Media PCI audio driver.
+ *
+ *      Copyright (C) 1999  ChenLi Tien (cltien@home.com)
+ *
+ *	Based on the PCI drivers by Thomas Sailer (sailer@ife.ee.ethz.ch)
+ *
+ *      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.
+ *
+ * Special thanks to David C. Niemi
+ *
+ *
+ * Module command line parameters:
+ *   none so far
+ *
+ *
+ *  Supported devices:
+ *  /dev/dsp    standard /dev/dsp device, (mostly) OSS compatible
+ *  /dev/mixer  standard /dev/mixer device, (mostly) OSS compatible
+ *  /dev/midi   simple MIDI UART interface, no ioctl
+ *
+ *  The card has both an FM and a Wavetable synth, but I have to figure
+ *  out first how to drive them...
+ *
+ *  Revision history
+ *    06.05.98   0.1   Initial release
+ *    10.05.98   0.2   Fixed many bugs, esp. ADC rate calculation
+ *                     First stab at a simple midi interface (no bells&whistles)
+ *    13.05.98   0.3   Fix stupid cut&paste error: set_adc_rate was called instead of
+ *                     set_dac_rate in the FMODE_WRITE case in cm_open
+ *                     Fix hwptr out of bounds (now mpg123 works)
+ *    14.05.98   0.4   Don't allow excessive interrupt rates
+ *    08.06.98   0.5   First release using Alan Cox' soundcore instead of miscdevice
+ *    03.08.98   0.6   Do not include modversions.h
+ *                     Now mixer behaviour can basically be selected between
+ *                     "OSS documented" and "OSS actual" behaviour
+ *    31.08.98   0.7   Fix realplayer problems - dac.count issues
+ *    10.12.98   0.8   Fix drain_dac trying to wait on not yet initialized DMA
+ *    16.12.98   0.9   Fix a few f_file & FMODE_ bugs
+ *    06.01.99   0.10  remove the silly SA_INTERRUPT flag.
+ *                     hopefully killed the egcs section type conflict
+ *    12.03.99   0.11  cinfo.blocks should be reset after GETxPTR ioctl.
+ *                     reported by Johan Maes <joma@telindus.be>
+ *    22.03.99   0.12  return EAGAIN instead of EBUSY when O_NONBLOCK
+ *                     read/write cannot be executed
+ *
+ */
+
+/*****************************************************************************/
+      
+#include <linux/config.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/sound.h>
+#include <linux/malloc.h>
+#include <linux/soundcard.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <asm/spinlock.h>
+#include <asm/uaccess.h>
+#include <asm/hardirq.h>
+
+#include "dm.h"
+
+/* --------------------------------------------------------------------- */
+
+#undef OSS_DOCUMENTED_MIXER_SEMANTICS
+
+/* --------------------------------------------------------------------- */
+
+#ifndef PCI_VENDOR_ID_CMEDIA
+#define PCI_VENDOR_ID_CMEDIA         0x13F6
+#endif
+#ifndef PCI_DEVICE_ID_CMEDIA_CM8338A
+#define PCI_DEVICE_ID_CMEDIA_CM8338A 0x0100
+#endif
+#ifndef PCI_DEVICE_ID_CMEDIA_CM8338B
+#define PCI_DEVICE_ID_CMEDIA_CM8338B 0x0101
+#endif
+#ifndef PCI_DEVICE_ID_CMEDIA_CM8738
+#define PCI_DEVICE_ID_CMEDIA_CM8738  0x0111
+#endif
+
+#define CM_MAGIC  ((PCI_VENDOR_ID_CMEDIA<<16)|PCI_DEVICE_ID_CMEDIA_CM8338A)
+
+/*
+ * CM8338 registers definition
+ */
+
+#define CODEC_CMI_FUNCTRL0      (0x00)
+#define CODEC_CMI_FUNCTRL1      (0x04)
+#define CODEC_CMI_CHFORMAT      (0x08)
+#define CODEC_CMI_INT_HLDCLR    (0x0C)
+#define CODEC_CMI_INT_STATUS    (0x10)
+#define CODEC_CMI_LEGACY_CTRL   (0x14)
+#define CODEC_CMI_MISC_CTRL     (0x18)
+#define CODEC_CMI_TDMA_POS      (0x1C)
+#define CODEC_CMI_MIXER         (0x20)
+#define CODEC_SB16_DATA         (0x22)
+#define CODEC_SB16_ADDR         (0x23)
+#define CODEC_CMI_MIXER1        (0x24)
+#define CODEC_CMI_MIXER2        (0x25)
+#define CODEC_CMI_AUX_VOL       (0x26)
+#define CODEC_CMI_MISC          (0x27)
+#define CODEC_CMI_AC97          (0x28)
+
+#define CODEC_CMI_CH0_FRAME1    (0x80)
+#define CODEC_CMI_CH0_FRAME2    (0x84)
+#define CODEC_CMI_CH1_FRAME1    (0x88)
+#define CODEC_CMI_CH1_FRAME2    (0x8C)
+
+#define CODEC_CMI_EXT_REG       (0xF0)
+#define UCHAR	unsigned char
+/*
+**  Mixer registers for SB16
+*/
+
+#define DSP_MIX_DATARESETIDX    ((UCHAR)(0x00))
+
+#define DSP_MIX_MASTERVOLIDX_L  ((UCHAR)(0x30))
+#define DSP_MIX_MASTERVOLIDX_R  ((UCHAR)(0x31))
+#define DSP_MIX_VOICEVOLIDX_L   ((UCHAR)(0x32))
+#define DSP_MIX_VOICEVOLIDX_R   ((UCHAR)(0x33))
+#define DSP_MIX_FMVOLIDX_L      ((UCHAR)(0x34))
+#define DSP_MIX_FMVOLIDX_R      ((UCHAR)(0x35))
+#define DSP_MIX_CDVOLIDX_L      ((UCHAR)(0x36))
+#define DSP_MIX_CDVOLIDX_R      ((UCHAR)(0x37))
+#define DSP_MIX_LINEVOLIDX_L    ((UCHAR)(0x38))
+#define DSP_MIX_LINEVOLIDX_R    ((UCHAR)(0x39))
+
+#define DSP_MIX_MICVOLIDX       ((UCHAR)(0x3A))
+#define DSP_MIX_SPKRVOLIDX      ((UCHAR)(0x3B))
+
+#define DSP_MIX_OUTMIXIDX       ((UCHAR)(0x3C))
+
+#define DSP_MIX_ADCMIXIDX_L     ((UCHAR)(0x3D))
+#define DSP_MIX_ADCMIXIDX_R     ((UCHAR)(0x3E))
+
+#define DSP_MIX_INGAINIDX_L     ((UCHAR)(0x3F))
+#define DSP_MIX_INGAINIDX_R     ((UCHAR)(0x40))
+#define DSP_MIX_OUTGAINIDX_L    ((UCHAR)(0x41))
+#define DSP_MIX_OUTGAINIDX_R    ((UCHAR)(0x42))
+
+#define DSP_MIX_AGCIDX          ((UCHAR)(0x43))
+
+#define DSP_MIX_TREBLEIDX_L     ((UCHAR)(0x44))
+#define DSP_MIX_TREBLEIDX_R     ((UCHAR)(0x45))
+#define DSP_MIX_BASSIDX_L       ((UCHAR)(0x46))
+#define DSP_MIX_BASSIDX_R       ((UCHAR)(0x47))
+#define CM_CH0_RESET	  0x04
+#define CM_CH1_RESET	  0x08
+#define CM_EXTENT_CODEC	  0x100
+#define CM_EXTENT_MIDI	  0x2
+#define CM_EXTENT_SYNTH	  0x4
+#define CM_INT_CH0	  1
+#define CM_INT_CH1	  2
+
+#define CM_CFMT_STEREO     0x01
+#define CM_CFMT_16BIT      0x02
+#define CM_CFMT_MASK       0x03
+#define CM_CFMT_DACSHIFT   0   
+#define CM_CFMT_ADCSHIFT   2
+
+static const unsigned sample_size[] = { 1, 2, 2, 4 };
+static const unsigned sample_shift[] = { 0, 1, 1, 2 };
+
+#define CM_CENABLE_RE      0x2
+#define CM_CENABLE_PE      0x1
+
+
+/* MIDI buffer sizes */
+
+#define MIDIINBUF  256
+#define MIDIOUTBUF 256
+
+#define FMODE_MIDI_SHIFT 2
+#define FMODE_MIDI_READ  (FMODE_READ << FMODE_MIDI_SHIFT)
+#define FMODE_MIDI_WRITE (FMODE_WRITE << FMODE_MIDI_SHIFT)
+
+#define FMODE_DMFM 0x10
+
+#define SND_DEV_DSP16   5 
+
+/* --------------------------------------------------------------------- */
+
+struct cm_state {
+	/* magic */
+	unsigned int magic;
+
+	/* we keep cm cards in a linked list */
+	struct cm_state *next;
+
+	/* soundcore stuff */
+	int dev_audio;
+	int dev_mixer;
+	int dev_midi;
+	int dev_dmfm;
+
+	/* hardware resources */
+	unsigned int iosb, iobase, iosynth, iomidi, iogame, irq;
+
+        /* mixer stuff */
+        struct {
+                unsigned int modcnt;
+#ifndef OSS_DOCUMENTED_MIXER_SEMANTICS
+		unsigned short vol[13];
+#endif /* OSS_DOCUMENTED_MIXER_SEMANTICS */
+        } mix;
+
+	/* wave stuff */
+	unsigned int rateadc, ratedac;
+	unsigned char fmt, enable;
+
+	spinlock_t lock;
+	struct semaphore open_sem;
+	mode_t open_mode;
+	struct wait_queue *open_wait;
+
+	struct dmabuf {
+		void *rawbuf;
+		unsigned buforder;
+		unsigned numfrag;
+		unsigned fragshift;
+		unsigned hwptr, swptr;
+		unsigned total_bytes;
+		int count;
+		unsigned error; /* over/underrun */
+		struct wait_queue *wait;
+		/* redundant, but makes calculations easier */
+		unsigned fragsize;
+		unsigned dmasize;
+		unsigned fragsamples;
+		/* OSS stuff */
+		unsigned mapped:1;
+		unsigned ready:1;
+		unsigned endcleared:1;
+		unsigned ossfragshift;
+		int ossmaxfrags;
+		unsigned subdivision;
+	} dma_dac, dma_adc;
+
+	/* midi stuff */
+	struct {
+		unsigned ird, iwr, icnt;
+		unsigned ord, owr, ocnt;
+		struct wait_queue *iwait;
+		struct wait_queue *owait;
+		struct timer_list timer;
+		unsigned char ibuf[MIDIINBUF];
+		unsigned char obuf[MIDIOUTBUF];
+	} midi;
+};
+
+/* --------------------------------------------------------------------- */
+
+static struct cm_state *devs = NULL;
+static unsigned long wavetable_mem = 0;
+
+/* --------------------------------------------------------------------- */
+
+extern __inline__ unsigned ld2(unsigned int x)
+{
+	unsigned r = 0;
+	
+	if (x >= 0x10000) {
+		x >>= 16;
+		r += 16;
+	}
+	if (x >= 0x100) {
+		x >>= 8;
+		r += 8;
+	}
+	if (x >= 0x10) {
+		x >>= 4;
+		r += 4;
+	}
+	if (x >= 4) {
+		x >>= 2;
+		r += 2;
+	}
+	if (x >= 2)
+		r++;
+	return r;
+}
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+
+#ifdef hweight32
+#undef hweight32
+#endif
+
+extern __inline__ unsigned int hweight32(unsigned int w)
+{
+        unsigned int res = (w & 0x55555555) + ((w >> 1) & 0x55555555);
+        res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
+        res = (res & 0x0F0F0F0F) + ((res >> 4) & 0x0F0F0F0F);
+        res = (res & 0x00FF00FF) + ((res >> 8) & 0x00FF00FF);
+        return (res & 0x0000FFFF) + ((res >> 16) & 0x0000FFFF);
+}
+
+/* --------------------------------------------------------------------- */
+
+static void set_dmadac(struct cm_state *s, unsigned int addr, unsigned int count)
+{
+	count--;
+	outl(addr, s->iobase + CODEC_CMI_CH0_FRAME1);
+	outw(count, s->iobase + CODEC_CMI_CH0_FRAME2);
+	outb(inb(s->iobase + CODEC_CMI_FUNCTRL0) & ~1, s->iobase + CODEC_CMI_FUNCTRL0);
+	outb(inb(s->iobase + CODEC_CMI_FUNCTRL0 + 2) | 1, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+}
+
+static void set_dmaadc(struct cm_state *s, unsigned int addr, unsigned int count)
+{
+	count--;
+	outl(addr, s->iobase + CODEC_CMI_CH1_FRAME1);
+	outw(count, s->iobase + CODEC_CMI_CH1_FRAME2);
+	outb(inb(s->iobase + CODEC_CMI_FUNCTRL0) | 2, s->iobase + CODEC_CMI_FUNCTRL0);
+	outb(inb(s->iobase + CODEC_CMI_FUNCTRL0 + 2) | 2, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+}
+
+extern __inline__ unsigned get_dmadac(struct cm_state *s)
+{
+	unsigned int curr_addr;
+
+	curr_addr = inl(s->iobase + CODEC_CMI_CH0_FRAME1);
+	curr_addr -= virt_to_bus(s->dma_dac.rawbuf);
+	curr_addr = s->dma_dac.dmasize - curr_addr;
+	curr_addr &= ~(sample_size[(s->fmt >> CM_CFMT_DACSHIFT) & CM_CFMT_MASK]-1);
+	return curr_addr;
+}
+
+extern __inline__ unsigned get_dmaadc(struct cm_state *s)
+{
+	unsigned int curr_addr;
+
+	curr_addr = inl(s->iobase + CODEC_CMI_CH1_FRAME1);
+	curr_addr -= virt_to_bus(s->dma_adc.rawbuf);
+	curr_addr = s->dma_adc.dmasize - curr_addr;
+	curr_addr &= ~(sample_size[(s->fmt >> CM_CFMT_ADCSHIFT) & CM_CFMT_MASK]-1);
+	return curr_addr;
+}
+
+static void wrmixer(struct cm_state *s, unsigned char idx, unsigned char data)
+{
+	outb(idx, s->iobase + CODEC_SB16_ADDR);
+	udelay(10);
+	outb(data, s->iobase + CODEC_SB16_DATA);
+	udelay(10);
+}
+
+static unsigned char rdmixer(struct cm_state *s, unsigned char idx)
+{
+	unsigned char v;
+
+	outb(idx, s->iobase + CODEC_SB16_ADDR);
+	udelay(10);
+	v = inb(s->iobase + CODEC_SB16_DATA);
+	udelay(10);
+	return v;
+}
+
+static void set_fmt(struct cm_state *s, unsigned char mask, unsigned char data)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	if (mask) {
+		s->fmt = inb(s->iobase + CODEC_CMI_CHFORMAT);
+		udelay(10);
+	}
+	s->fmt = (s->fmt & mask) | data;
+	outb(s->fmt, s->iobase + CODEC_CMI_CHFORMAT);
+	spin_unlock_irqrestore(&s->lock, flags);
+	udelay(10);
+}
+
+static void frobindir(struct cm_state *s, unsigned char idx, unsigned char mask, unsigned char data)
+{
+	outb(idx, s->iobase + CODEC_SB16_ADDR);
+	udelay(10);
+	outb((inb(s->iobase + CODEC_SB16_DATA) & mask) | data, s->iobase + CODEC_SB16_DATA);
+	udelay(10);
+}
+
+static struct {
+	unsigned	rate;
+	unsigned	lower;
+	unsigned	upper;
+	unsigned char	freq;
+} rate_lookup[] =
+{
+	{ 5512,		(0 + 5512) / 2,		(5512 + 8000) / 2,	0 },
+	{ 8000,		(5512 + 8000) / 2,	(8000 + 11025) / 2,	4 },
+	{ 11025,	(8000 + 11025) / 2,	(11025 + 16000) / 2,	1 },
+	{ 16000,	(11025 + 16000) / 2,	(16000 + 22050) / 2,	5 },
+	{ 22050,	(16000 + 22050) / 2,	(22050 + 32000) / 2,	2 },
+	{ 32000,	(22050 + 32000) / 2,	(32000 + 44100) / 2,	6 },
+	{ 44100,	(32000 + 44100) / 2,	(44100 + 48000) / 2,	3 },
+	{ 48000,	48000,			48000,			7 }
+};
+
+static void set_dac_rate(struct cm_state *s, unsigned rate)
+{
+	unsigned long flags;
+	unsigned char freq = 4, val;
+	int	i;
+
+	if (rate > 48000)
+		rate = 48000;
+	if (rate < 5512)
+		rate = 5512;
+	for (i = 0; i < sizeof(rate_lookup) / sizeof(rate_lookup[0]); i++)
+	{
+		if (rate > rate_lookup[i].lower && rate <= rate_lookup[i].upper)
+		{
+			rate = rate_lookup[i].rate;
+			freq = rate_lookup[i].freq;
+			break;
+	    	}
+	}
+	s->ratedac = rate;
+	freq <<= 2;
+	spin_lock_irqsave(&s->lock, flags);
+	val = inb(s->iobase + CODEC_CMI_FUNCTRL1 + 1) & ~0x1c; 
+	outb(val | freq, s->iobase + CODEC_CMI_FUNCTRL1 + 1);
+	spin_unlock_irqrestore(&s->lock, flags);
+}
+
+static void set_adc_rate(struct cm_state *s, unsigned rate)
+{
+	unsigned long flags;
+	unsigned char freq = 4, val;
+	int	i;
+
+	if (rate > 48000)
+		rate = 48000;
+	if (rate < 5512)
+		rate = 5512;
+	for (i = 0; i < sizeof(rate_lookup) / sizeof(rate_lookup[0]); i++)
+	{
+		if (rate > rate_lookup[i].lower && rate <= rate_lookup[i].upper)
+		{
+			rate = rate_lookup[i].rate;
+			freq = rate_lookup[i].freq;
+			break;
+	    	}
+	}
+	s->rateadc = rate;
+	freq <<= 5;
+	spin_lock_irqsave(&s->lock, flags);
+	val = inb(s->iobase + CODEC_CMI_FUNCTRL1 + 1) & ~0xe0; 
+	outb(val | freq, s->iobase + CODEC_CMI_FUNCTRL1 + 1);
+	spin_unlock_irqrestore(&s->lock, flags);
+}
+
+/* --------------------------------------------------------------------- */
+
+extern inline void stop_adc(struct cm_state *s)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	s->enable &= ~CM_CENABLE_RE;
+	/* disable interrupt */
+	outb(inb(s->iobase + CODEC_CMI_INT_HLDCLR + 2) & ~2, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	/* disable channel and reset */
+	outb(s->enable | CM_CH1_RESET, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+	udelay(10);
+	outb(s->enable & ~CM_CH1_RESET, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+	spin_unlock_irqrestore(&s->lock, flags);
+}	
+
+extern inline void stop_dac(struct cm_state *s)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	s->enable &= ~CM_CENABLE_PE;
+	/* disable interrupt */
+	outb(inb(s->iobase + CODEC_CMI_INT_HLDCLR + 2) & ~1, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	/* disable channel and reset */
+	outb(s->enable | CM_CH0_RESET, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+	udelay(10);
+	outb(s->enable & ~CM_CH0_RESET, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+	spin_unlock_irqrestore(&s->lock, flags);
+}	
+
+static void start_dac(struct cm_state *s)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	if ((s->dma_dac.mapped || s->dma_dac.count > 0) && s->dma_dac.ready) {
+		s->enable |= CM_CENABLE_PE;
+		outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+	}
+	outb(inb(s->iobase + CODEC_CMI_INT_HLDCLR + 2) | 1, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	spin_unlock_irqrestore(&s->lock, flags);
+}	
+
+static void start_adc(struct cm_state *s)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	if ((s->dma_adc.mapped || s->dma_adc.count < (signed)(s->dma_adc.dmasize - 2*s->dma_adc.fragsize)) 
+	    && s->dma_adc.ready) {
+		s->enable |= CM_CENABLE_RE;
+		outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+	}
+	outb(inb(s->iobase + CODEC_CMI_INT_HLDCLR + 2) | 2, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	spin_unlock_irqrestore(&s->lock, flags);
+}	
+
+/* --------------------------------------------------------------------- */
+
+#define DMABUF_DEFAULTORDER (17-PAGE_SHIFT)
+#define DMABUF_MINORDER 1
+
+static void dealloc_dmabuf(struct dmabuf *db)
+{
+	unsigned long map, mapend;
+
+	if (db->rawbuf) {
+		/* undo marking the pages as reserved */
+		mapend = MAP_NR(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
+		for (map = MAP_NR(db->rawbuf); map <= mapend; map++)
+			clear_bit(PG_reserved, &mem_map[map].flags);	
+		free_pages((unsigned long)db->rawbuf, db->buforder);
+	}
+	db->rawbuf = NULL;
+	db->mapped = db->ready = 0;
+}
+
+
+/* Ch0 is used for playback, Ch1 is used for recording */
+
+static int prog_dmabuf(struct cm_state *s, unsigned rec)
+{
+	struct dmabuf *db = rec ? &s->dma_adc : &s->dma_dac;
+	unsigned rate = rec ? s->rateadc : s->ratedac;
+	int order;
+	unsigned bytepersec;
+	unsigned bufs;
+	unsigned long map, mapend;
+	unsigned char fmt;
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	fmt = s->fmt;
+	if (rec) {
+		s->enable &= ~CM_CENABLE_RE;
+		fmt >>= CM_CFMT_ADCSHIFT;
+	} else {
+		s->enable &= ~CM_CENABLE_PE;
+		fmt >>= CM_CFMT_DACSHIFT;
+	}
+	outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+	spin_unlock_irqrestore(&s->lock, flags);
+	fmt &= CM_CFMT_MASK;
+	db->hwptr = db->swptr = db->total_bytes = db->count = db->error = db->endcleared = 0;
+	if (!db->rawbuf) {
+		db->ready = db->mapped = 0;
+		for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER && !db->rawbuf; order--)
+			db->rawbuf = (void *)__get_free_pages(GFP_KERNEL | GFP_DMA, order);
+		if (!db->rawbuf)
+			return -ENOMEM;
+		db->buforder = order;
+		if ((virt_to_bus(db->rawbuf) ^ (virt_to_bus(db->rawbuf) + (PAGE_SIZE << db->buforder) - 1)) & ~0xffff)
+			printk(KERN_DEBUG "cm: DMA buffer crosses 64k boundary: busaddr 0x%lx  size %ld\n", 
+			       virt_to_bus(db->rawbuf), PAGE_SIZE << db->buforder);
+		if ((virt_to_bus(db->rawbuf) + (PAGE_SIZE << db->buforder) - 1) & ~0xffffff)
+			printk(KERN_DEBUG "cm: DMA buffer beyond 16MB: busaddr 0x%lx  size %ld\n", 
+			       virt_to_bus(db->rawbuf), PAGE_SIZE << db->buforder);
+		/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+		mapend = MAP_NR(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
+		for (map = MAP_NR(db->rawbuf); map <= mapend; map++)
+			set_bit(PG_reserved, &mem_map[map].flags);
+	}
+	bytepersec = rate << sample_shift[fmt];
+	bufs = PAGE_SIZE << db->buforder;
+	if (db->ossfragshift) {
+		if ((1000 << db->ossfragshift) < bytepersec)
+			db->fragshift = ld2(bytepersec/1000);
+		else
+			db->fragshift = db->ossfragshift;
+	} else {
+		db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1));
+		if (db->fragshift < 3)
+			db->fragshift = 3;
+	}
+	db->numfrag = bufs >> db->fragshift;
+	while (db->numfrag < 4 && db->fragshift > 3) {
+		db->fragshift--;
+		db->numfrag = bufs >> db->fragshift;
+	}
+	db->fragsize = 1 << db->fragshift;
+	if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
+		db->numfrag = db->ossmaxfrags;
+#if 1
+	/* to make fragsize >= 4096 */
+	while (db->fragsize < 4096 && db->numfrag >= 4)
+	{
+		db->fragsize *= 2;
+		db->fragshift++;
+		db->numfrag /= 2;
+	}
+#endif
+	db->fragsamples = db->fragsize >> sample_shift[fmt];
+	db->dmasize = db->numfrag << db->fragshift;
+	memset(db->rawbuf, (fmt & CM_CFMT_16BIT) ? 0 : 0x80, db->dmasize);
+	spin_lock_irqsave(&s->lock, flags);
+	if (rec) {
+		set_dmaadc(s, virt_to_bus(db->rawbuf), db->dmasize >> sample_shift[fmt]);
+		/* program sample counts */
+		outw(db->fragsamples-1, s->iobase + CODEC_CMI_CH1_FRAME2 + 2);
+	} else {
+		set_dmadac(s, virt_to_bus(db->rawbuf), db->dmasize >> sample_shift[fmt]);
+		/* program sample counts */
+		outw(db->fragsamples-1, s->iobase + CODEC_CMI_CH0_FRAME2 + 2);
+	}
+	spin_unlock_irqrestore(&s->lock, flags);
+	db->ready = 1;
+	return 0;
+}
+
+extern __inline__ void clear_advance(struct cm_state *s)
+{
+	unsigned char c = (s->fmt & (CM_CFMT_16BIT << CM_CFMT_DACSHIFT)) ? 0 : 0x80;
+	unsigned char *buf = s->dma_dac.rawbuf;
+	unsigned bsize = s->dma_dac.dmasize;
+	unsigned bptr = s->dma_dac.swptr;
+	unsigned len = s->dma_dac.fragsize;
+
+	if (bptr + len > bsize) {
+		unsigned x = bsize - bptr;
+		memset(buf + bptr, c, x);
+		bptr = 0;
+		len -= x;
+	}
+	memset(buf + bptr, c, len);
+}
+
+/* call with spinlock held! */
+static void cm_update_ptr(struct cm_state *s)
+{
+	unsigned hwptr;
+	int diff;
+
+	/* update ADC pointer */
+	if (s->dma_adc.ready) {
+		hwptr = (s->dma_adc.dmasize - get_dmaadc(s)) % s->dma_adc.dmasize;
+		diff = (s->dma_adc.dmasize + hwptr - s->dma_adc.hwptr) % s->dma_adc.dmasize;
+		s->dma_adc.hwptr = hwptr;
+		s->dma_adc.total_bytes += diff;
+		s->dma_adc.count += diff;
+		if (s->dma_adc.count >= (signed)s->dma_adc.fragsize) 
+			wake_up(&s->dma_adc.wait);
+		if (!s->dma_adc.mapped) {
+			if (s->dma_adc.count > (signed)(s->dma_adc.dmasize - ((3 * s->dma_adc.fragsize) >> 1))) {
+				s->enable &= ~CM_CENABLE_RE;
+				outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+				s->dma_adc.error++;
+			}
+		}
+	}
+	/* update DAC pointer */
+	if (s->dma_dac.ready) {
+		hwptr = (s->dma_dac.dmasize - get_dmadac(s)) % s->dma_dac.dmasize;
+		diff = (s->dma_dac.dmasize + hwptr - s->dma_dac.hwptr) % s->dma_dac.dmasize;
+		s->dma_dac.hwptr = hwptr;
+		s->dma_dac.total_bytes += diff;
+		if (s->dma_dac.mapped) {
+			s->dma_dac.count += diff;
+			if (s->dma_dac.count >= (signed)s->dma_dac.fragsize)
+				wake_up(&s->dma_dac.wait);
+		} else {
+			s->dma_dac.count -= diff;
+			if (s->dma_dac.count <= 0) {
+				s->enable &= ~CM_CENABLE_PE;
+				outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
+				s->dma_dac.error++;
+			} else if (s->dma_dac.count <= (signed)s->dma_dac.fragsize && !s->dma_dac.endcleared) {
+				clear_advance(s);
+				s->dma_dac.endcleared = 1;
+			}
+			if (s->dma_dac.count + (signed)s->dma_dac.fragsize <= (signed)s->dma_dac.dmasize)
+				wake_up(&s->dma_dac.wait);
+		}
+	}
+}
+
+/* hold spinlock for the following! */
+static void cm_handle_midi(struct cm_state *s)
+{
+	unsigned char ch;
+	int wake;
+
+	wake = 0;
+	while (!(inb(s->iomidi+1) & 0x80)) {
+		ch = inb(s->iomidi);
+		if (s->midi.icnt < MIDIINBUF) {
+			s->midi.ibuf[s->midi.iwr] = ch;
+			s->midi.iwr = (s->midi.iwr + 1) % MIDIINBUF;
+			s->midi.icnt++;
+		}
+		wake = 1;
+	}
+	if (wake)
+		wake_up(&s->midi.iwait);
+	wake = 0;
+	while (!(inb(s->iomidi+1) & 0x40) && s->midi.ocnt > 0) {
+		outb(s->midi.obuf[s->midi.ord], s->iomidi);
+		s->midi.ord = (s->midi.ord + 1) % MIDIOUTBUF;
+		s->midi.ocnt--;
+		if (s->midi.ocnt < MIDIOUTBUF-16)
+			wake = 1;
+	}
+	if (wake)
+		wake_up(&s->midi.owait);
+}
+
+static void cm_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct cm_state *s = (struct cm_state *)dev_id;
+	unsigned int intsrc, intstat;
+	
+	/* fastpath out, to ease interrupt sharing */
+	intsrc = inb(s->iobase + CODEC_CMI_INT_STATUS);
+	if (!(intsrc & (CM_INT_CH0 | CM_INT_CH1)))
+		return;
+	spin_lock(&s->lock);
+	intstat = inb(s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	/* disable interrupt */
+	if (intsrc & CM_INT_CH0)
+		outb(intstat & ~1, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	if (intsrc & CM_INT_CH1)
+		outb(intstat & ~2, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	cm_update_ptr(s);
+#ifdef SOUND_CONFIG_CMPCI_MIDI
+	cm_handle_midi(s);
+#endif
+	/* enable interrupt */
+	if (intsrc & CM_INT_CH0)
+		outb(intstat | 1, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	if (intsrc & CM_INT_CH1)
+		outb(intstat | 2, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
+	spin_unlock(&s->lock);
+}
+
+static void cm_midi_timer(unsigned long data)
+{
+	struct cm_state *s = (struct cm_state *)data;
+	unsigned long flags;
+	
+	spin_lock_irqsave(&s->lock, flags);
+	cm_handle_midi(s);
+	spin_unlock_irqrestore(&s->lock, flags);
+	s->midi.timer.expires = jiffies+1;
+	add_timer(&s->midi.timer);
+}
+
+/* --------------------------------------------------------------------- */
+
+static const char invalid_magic[] = KERN_CRIT "cm: invalid magic value\n";
+
+#ifdef CONFIG_SOUND_CMPCI	/* support multiple chips */
+#define VALIDATE_STATE(s)
+#else
+#define VALIDATE_STATE(s)                         \
+({                                                \
+	if (!(s) || (s)->magic != CM_MAGIC) { \
+		printk(invalid_magic);            \
+		return -ENXIO;                    \
+	}                                         \
+})
+#endif
+
+/* --------------------------------------------------------------------- */
+
+#define MT_4          1
+#define MT_5MUTE      2
+#define MT_4MUTEMONO  3
+#define MT_6MUTE      4
+
+static const struct {
+	unsigned left;
+	unsigned right;
+	unsigned type;
+	unsigned rec;
+	unsigned play;
+} mixtable[SOUND_MIXER_NRDEVICES] = {
+	[SOUND_MIXER_CD]     = { DSP_MIX_CDVOLIDX_L,     DSP_MIX_CDVOLIDX_R,     MT_5MUTE,     0x04, 0x02 },
+	[SOUND_MIXER_LINE]   = { DSP_MIX_LINEVOLIDX_L,   DSP_MIX_LINEVOLIDX_R,   MT_5MUTE,     0x10, 0x08 },
+	[SOUND_MIXER_MIC]    = { DSP_MIX_MICVOLIDX,      CODEC_CMI_MIXER2,       MT_4MUTEMONO, 0x01, 0x01 },
+	[SOUND_MIXER_SYNTH]  = { DSP_MIX_FMVOLIDX_L,  	 DSP_MIX_FMVOLIDX_R,     MT_5MUTE,     0x40, 0x00 },
+	[SOUND_MIXER_VOLUME] = { DSP_MIX_MASTERVOLIDX_L, DSP_MIX_MASTERVOLIDX_R, MT_5MUTE,     0x00, 0x00 },
+	[SOUND_MIXER_PCM]    = { DSP_MIX_VOICEVOLIDX_L,  DSP_MIX_VOICEVOLIDX_R,  MT_5MUTE,     0x00, 0x00 }
+};
+
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+
+static int return_mixval(struct cm_state *s, unsigned i, int *arg)
+{
+	unsigned long flags;
+	unsigned char l, r, rl, rr;
+
+	spin_lock_irqsave(&s->lock, flags);
+	l = rdmixer(s, mixtable[i].left);
+	r = rdmixer(s, mixtable[i].right);
+	spin_unlock_irqrestore(&s->lock, flags);
+	switch (mixtable[i].type) {
+	case MT_4:
+		r &= 0xf;
+		l &= 0xf;
+		rl = 10 + 6 * (l & 15);
+		rr = 10 + 6 * (r & 15);
+		break;
+
+	case MT_4MUTEMONO:
+		rl = 55 - 3 * (l & 15);
+		if (r & 0x10)
+			rl += 45;
+		rr = rl;
+		r = l;
+		break;
+
+	case MT_5MUTE:
+	default:
+		rl = 100 - 3 * (l & 31);
+		rr = 100 - 3 * (r & 31);
+		break;
+				
+	case MT_6MUTE:
+		rl = 100 - 3 * (l & 63) / 2;
+		rr = 100 - 3 * (r & 63) / 2;
+		break;
+	}
+	if (l & 0x80)
+		rl = 0;
+	if (r & 0x80)
+		rr = 0;
+	return put_user((rr << 8) | rl, arg);
+}
+
+#else /* OSS_DOCUMENTED_MIXER_SEMANTICS */
+
+static const unsigned char volidx[SOUND_MIXER_NRDEVICES] = 
+{
+	[SOUND_MIXER_CD]     = 1,
+	[SOUND_MIXER_LINE]   = 2,
+	[SOUND_MIXER_MIC]    = 3,
+	[SOUND_MIXER_SYNTH]  = 4,
+	[SOUND_MIXER_VOLUME] = 5,
+	[SOUND_MIXER_PCM]    = 6
+};
+
+#endif /* OSS_DOCUMENTED_MIXER_SEMANTICS */
+
+static unsigned mixer_recmask(struct cm_state *s)
+{
+	unsigned long flags;
+	int i, j, k;
+
+	spin_lock_irqsave(&s->lock, flags);
+	j = rdmixer(s, DSP_MIX_ADCMIXIDX_L);
+	spin_unlock_irqrestore(&s->lock, flags);
+	j &= 0x7f;
+	for (k = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
+		if (j & mixtable[i].rec)
+			k |= 1 << i;
+	return k;
+}
+
+static int mixer_ioctl(struct cm_state *s, unsigned int cmd, unsigned long arg)
+{
+	unsigned long flags;
+	int i, val, j;
+	unsigned char l, r, rl, rr;
+
+	VALIDATE_STATE(s);
+        if (cmd == SOUND_MIXER_INFO) {
+		mixer_info info;
+		strncpy(info.id, "cmpci", sizeof(info.id));
+		strncpy(info.name, "C-Media PCI", sizeof(info.name));
+		info.modify_counter = s->mix.modcnt;
+		if (copy_to_user((void *)arg, &info, sizeof(info)))
+			return -EFAULT;
+		return 0;
+	}
+	if (cmd == SOUND_OLD_MIXER_INFO) {
+		_old_mixer_info info;
+		strncpy(info.id, "cmpci", sizeof(info.id));
+		strncpy(info.name, "C-Media cmpci", sizeof(info.name));
+		if (copy_to_user((void *)arg, &info, sizeof(info)))
+			return -EFAULT;
+		return 0;
+	}
+	if (cmd == OSS_GETVERSION)
+		return put_user(SOUND_VERSION, (int *)arg);
+	if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
+                return -EINVAL;
+        if (_IOC_DIR(cmd) == _IOC_READ) {
+                switch (_IOC_NR(cmd)) {
+                case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
+			return put_user(mixer_recmask(s), (int *)arg);
+			
+                case SOUND_MIXER_OUTSRC: /* Arg contains a bit for each recording source */
+			return put_user(mixer_recmask(s), (int *)arg);//need fix
+			
+                case SOUND_MIXER_DEVMASK: /* Arg contains a bit for each supported device */
+			for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
+				if (mixtable[i].type)
+					val |= 1 << i;
+			return put_user(val, (int *)arg);
+
+                case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
+			for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
+				if (mixtable[i].rec)
+					val |= 1 << i;
+			return put_user(val, (int *)arg);
+			
+                case SOUND_MIXER_OUTMASK: /* Arg contains a bit for each supported recording source */
+			for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
+				if (mixtable[i].play)
+					val |= 1 << i;
+			return put_user(val, (int *)arg);
+			
+                 case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
+			for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
+				if (mixtable[i].type && mixtable[i].type != MT_4MUTEMONO)
+					val |= 1 << i;
+			return put_user(val, (int *)arg);
+			
+                case SOUND_MIXER_CAPS:
+			return put_user(0, (int *)arg);
+
+		default:
+			i = _IOC_NR(cmd);
+                        if (i >= SOUND_MIXER_NRDEVICES || !mixtable[i].type)
+                                return -EINVAL;
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+			return return_mixval(s, i, (int *)arg);
+#else /* OSS_DOCUMENTED_MIXER_SEMANTICS */
+			if (!volidx[i])
+				return -EINVAL;
+			return put_user(s->mix.vol[volidx[i]-1], (int *)arg);
+#endif /* OSS_DOCUMENTED_MIXER_SEMANTICS */
+		}
+	}
+        if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE)) 
+		return -EINVAL;
+	s->mix.modcnt++;
+	switch (_IOC_NR(cmd)) {
+	case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
+		get_user_ret(val, (int *)arg, -EFAULT);
+		i = hweight32(val);
+		for (j = i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
+			if (!(val & (1 << i)))
+				continue;
+			if (!mixtable[i].rec) {
+				val &= ~(1 << i);
+				continue;
+			}
+			j |= mixtable[i].rec;
+		}
+		spin_lock_irqsave(&s->lock, flags);
+		wrmixer(s, DSP_MIX_ADCMIXIDX_L, j);
+		wrmixer(s, DSP_MIX_ADCMIXIDX_R, (j & 1) | j>>1);
+		spin_unlock_irqrestore(&s->lock, flags);
+		return 0;
+
+	case SOUND_MIXER_OUTSRC: /* Arg contains a bit for each recording source */
+		get_user_ret(val, (int *)arg, -EFAULT);
+		for (j = i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
+			if (!(val & (1 << i)))
+				continue;
+			if (!mixtable[i].play) {
+				val &= ~(1 << i);
+				continue;
+			}
+			j |= mixtable[i].play;
+		}
+		spin_lock_irqsave(&s->lock, flags);
+		frobindir(s, DSP_MIX_OUTMIXIDX, 0x1f, j);
+		spin_unlock_irqrestore(&s->lock, flags);
+		return 0;
+
+		default:
+		i = _IOC_NR(cmd);
+		if (i >= SOUND_MIXER_NRDEVICES || !mixtable[i].type)
+			return -EINVAL;
+		get_user_ret(val, (int *)arg, -EFAULT);
+		l = val & 0xff;
+		r = (val >> 8) & 0xff;
+		if (l > 100)
+			l = 100;
+		if (r > 100)
+			r = 100;
+		spin_lock_irqsave(&s->lock, flags);
+		switch (mixtable[i].type) {
+		case MT_4:
+			if (l >= 10)
+				l -= 10;
+			if (r >= 10)
+				r -= 10;
+			frobindir(s, mixtable[i].left, 0xf0, l / 6);
+			frobindir(s, mixtable[i].right, 0xf0, l / 6);
+			break;
+
+		case MT_4MUTEMONO:
+			rl = (l < 4 ? 0 : (l - 5) / 3) & 31;
+			rr = (rl >> 2) & 7;
+			wrmixer(s, mixtable[i].left, rl<<3);
+			outb((inb(s->iobase + CODEC_CMI_MIXER2) & ~0x0e) | rr<<1, s->iobase + CODEC_CMI_MIXER2);
+			break;
+			
+		case MT_5MUTE:
+			rl = l < 4 ? 0 : (l - 5) / 3;
+			rr = r < 4 ? 0 : (r - 5) / 3;
+ 			wrmixer(s, mixtable[i].left, rl<<3);
+			wrmixer(s, mixtable[i].right, rr<<3);
+			break;
+				
+		case MT_6MUTE:
+			if (l < 6)
+				rl = 0x00;
+			else
+				rl = l * 2 / 3;
+			if (r < 6)
+				rr = 0x00;
+			else
+				rr = r * 2 / 3;
+			wrmixer(s, mixtable[i].left, rl);
+			wrmixer(s, mixtable[i].right, rr);
+			break;
+		}
+		spin_unlock_irqrestore(&s->lock, flags);
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+                return return_mixval(s, i, (int *)arg);
+#else /* OSS_DOCUMENTED_MIXER_SEMANTICS */
+		if (!volidx[i])
+			return -EINVAL;
+		s->mix.vol[volidx[i]-1] = val;
+		return put_user(s->mix.vol[volidx[i]-1], (int *)arg);
+#endif /* OSS_DOCUMENTED_MIXER_SEMANTICS */
+	}
+}
+
+/* --------------------------------------------------------------------- */
+
+static loff_t cm_llseek(struct file *file, loff_t offset, int origin)
+{
+	return -ESPIPE;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int cm_open_mixdev(struct inode *inode, struct file *file)
+{
+	int minor = MINOR(inode->i_rdev);
+	struct cm_state *s = devs;
+
+	while (s && s->dev_mixer != minor)
+		s = s->next;
+	if (!s)
+		return -ENODEV;
+       	VALIDATE_STATE(s);
+	file->private_data = s;
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int cm_release_mixdev(struct inode *inode, struct file *file)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	
+	VALIDATE_STATE(s);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static int cm_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	return mixer_ioctl((struct cm_state *)file->private_data, cmd, arg);
+}
+
+static /*const*/ struct file_operations cm_mixer_fops = {
+	&cm_llseek,
+	NULL,  /* read */
+	NULL,  /* write */
+	NULL,  /* readdir */
+	NULL,  /* poll */
+	&cm_ioctl_mixdev,
+	NULL,  /* mmap */
+	&cm_open_mixdev,
+	NULL,	/* flush */
+	&cm_release_mixdev,
+	NULL,  /* fsync */
+	NULL,  /* fasync */
+	NULL,  /* check_media_change */
+	NULL,  /* revalidate */
+	NULL,  /* lock */
+};
+
+/* --------------------------------------------------------------------- */
+
+static int drain_dac(struct cm_state *s, int nonblock)
+{
+        struct wait_queue wait = { current, NULL };
+	unsigned long flags;
+	int count, tmo;
+
+	if (s->dma_dac.mapped || !s->dma_dac.ready)
+		return 0;
+        current->state = TASK_INTERRUPTIBLE;
+        add_wait_queue(&s->dma_dac.wait, &wait);
+        for (;;) {
+                spin_lock_irqsave(&s->lock, flags);
+		count = s->dma_dac.count;
+                spin_unlock_irqrestore(&s->lock, flags);
+		if (count <= 0)
+			break;
+		if (signal_pending(current))
+                        break;
+                if (nonblock) {
+                        remove_wait_queue(&s->dma_dac.wait, &wait);
+                        current->state = TASK_RUNNING;
+                        return -EBUSY;
+                }
+		tmo = (count * HZ) / s->ratedac;
+		tmo >>= sample_shift[(s->fmt >> CM_CFMT_DACSHIFT) & CM_CFMT_MASK];
+		if (!schedule_timeout(tmo ? : 1) && tmo)
+			printk(KERN_DEBUG "cm: dma timed out??\n");
+        }
+        remove_wait_queue(&s->dma_dac.wait, &wait);
+        current->state = TASK_RUNNING;
+        if (signal_pending(current))
+                return -ERESTARTSYS;
+        return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static ssize_t cm_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	ssize_t ret;
+	unsigned long flags;
+	unsigned swptr;
+	int cnt;
+
+	VALIDATE_STATE(s);
+	if (ppos != &file->f_pos)
+		return -ESPIPE;
+	if (s->dma_adc.mapped)
+		return -ENXIO;
+	if (!s->dma_adc.ready && (ret = prog_dmabuf(s, 1)))
+		return ret;
+	if (!access_ok(VERIFY_WRITE, buffer, count))
+		return -EFAULT;
+	ret = 0;
+#if 0
+   spin_lock_irqsave(&s->lock, flags);
+   cm_update_ptr(s);
+   spin_unlock_irqrestore(&s->lock, flags);
+#endif
+	while (count > 0) {
+		spin_lock_irqsave(&s->lock, flags);
+		swptr = s->dma_adc.swptr;
+		cnt = s->dma_adc.dmasize-swptr;
+		if (s->dma_adc.count < cnt)
+			cnt = s->dma_adc.count;
+		spin_unlock_irqrestore(&s->lock, flags);
+		if (cnt > count)
+			cnt = count;
+		if (cnt <= 0) {
+			start_adc(s);
+			if (file->f_flags & O_NONBLOCK)
+				return ret ? ret : -EAGAIN;
+			interruptible_sleep_on(&s->dma_adc.wait);
+			if (signal_pending(current))
+				return ret ? ret : -ERESTARTSYS;
+			continue;
+		}
+		if (copy_to_user(buffer, s->dma_adc.rawbuf + swptr, cnt))
+			return ret ? ret : -EFAULT;
+		swptr = (swptr + cnt) % s->dma_adc.dmasize;
+		spin_lock_irqsave(&s->lock, flags);
+		s->dma_adc.swptr = swptr;
+		s->dma_adc.count -= cnt;
+		spin_unlock_irqrestore(&s->lock, flags);
+		count -= cnt;
+		buffer += cnt;
+		ret += cnt;
+		start_adc(s);
+	}
+	return ret;
+}
+
+static ssize_t cm_write(struct file *file, const char *buffer, size_t count, loff_t *ppos)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	ssize_t ret;
+	unsigned long flags;
+	unsigned swptr;
+	int cnt;
+
+	VALIDATE_STATE(s);
+	if (ppos != &file->f_pos)
+		return -ESPIPE;
+	if (s->dma_dac.mapped)
+		return -ENXIO;
+	if (!s->dma_dac.ready && (ret = prog_dmabuf(s, 0)))
+		return ret;
+	if (!access_ok(VERIFY_READ, buffer, count))
+		return -EFAULT;
+	ret = 0;
+#if 0
+   spin_lock_irqsave(&s->lock, flags);
+   cm_update_ptr(s);
+   spin_unlock_irqrestore(&s->lock, flags);
+#endif
+	while (count > 0) {
+		spin_lock_irqsave(&s->lock, flags);
+		if (s->dma_dac.count < 0) {
+			s->dma_dac.count = 0;
+			s->dma_dac.swptr = s->dma_dac.hwptr;
+		}
+		swptr = s->dma_dac.swptr;
+		cnt = s->dma_dac.dmasize-swptr;
+		if (s->dma_dac.count + cnt > s->dma_dac.dmasize)
+			cnt = s->dma_dac.dmasize - s->dma_dac.count;
+		spin_unlock_irqrestore(&s->lock, flags);
+		if (cnt > count)
+			cnt = count;
+		if (cnt <= 0) {
+			start_dac(s);
+			if (file->f_flags & O_NONBLOCK)
+				return ret ? ret : -EAGAIN;
+			interruptible_sleep_on(&s->dma_dac.wait);
+			if (signal_pending(current))
+				return ret ? ret : -ERESTARTSYS;
+			continue;
+		}
+		if (copy_from_user(s->dma_dac.rawbuf + swptr, buffer, cnt))
+			return ret ? ret : -EFAULT;
+		swptr = (swptr + cnt) % s->dma_dac.dmasize;
+		spin_lock_irqsave(&s->lock, flags);
+		s->dma_dac.swptr = swptr;
+		s->dma_dac.count += cnt;
+		s->dma_dac.endcleared = 0;
+		spin_unlock_irqrestore(&s->lock, flags);
+		count -= cnt;
+		buffer += cnt;
+		ret += cnt;
+		start_dac(s);
+	}
+	return ret;
+}
+
+static unsigned int cm_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	unsigned long flags;
+	unsigned int mask = 0;
+
+	VALIDATE_STATE(s);
+	if (file->f_mode & FMODE_WRITE)
+		poll_wait(file, &s->dma_dac.wait, wait);
+	if (file->f_mode & FMODE_READ)
+		poll_wait(file, &s->dma_adc.wait, wait);
+	spin_lock_irqsave(&s->lock, flags);
+	cm_update_ptr(s);
+	if (file->f_mode & FMODE_READ) {
+		if (s->dma_adc.count >= (signed)s->dma_adc.fragsize)
+			mask |= POLLIN | POLLRDNORM;
+	}
+	if (file->f_mode & FMODE_WRITE) {
+		if (s->dma_dac.mapped) {
+			if (s->dma_dac.count >= (signed)s->dma_dac.fragsize) 
+				mask |= POLLOUT | POLLWRNORM;
+		} else {
+			if ((signed)s->dma_dac.dmasize >= s->dma_dac.count + (signed)s->dma_dac.fragsize)
+				mask |= POLLOUT | POLLWRNORM;
+		}
+	}
+	spin_unlock_irqrestore(&s->lock, flags);
+	return mask;
+}
+
+static int cm_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	struct dmabuf *db;
+	int ret;
+	unsigned long size;
+
+	VALIDATE_STATE(s);
+	if (vma->vm_flags & VM_WRITE) {
+		if ((ret = prog_dmabuf(s, 1)) != 0)
+			return ret;
+		db = &s->dma_dac;
+	} else if (vma->vm_flags & VM_READ) {
+		if ((ret = prog_dmabuf(s, 0)) != 0)
+			return ret;
+		db = &s->dma_adc;
+	} else 
+		return -EINVAL;
+	if (vma->vm_offset != 0)
+		return -EINVAL;
+	size = vma->vm_end - vma->vm_start;
+	if (size > (PAGE_SIZE << db->buforder))
+		return -EINVAL;
+	if (remap_page_range(vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
+		return -EAGAIN;
+	db->mapped = 1;
+	return 0;
+}
+
+static int cm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	unsigned long flags;
+        audio_buf_info abinfo;
+        count_info cinfo;
+	int val, mapped, ret;
+	unsigned char fmtm, fmtd;
+
+	VALIDATE_STATE(s);
+        mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
+		((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
+	switch (cmd) {
+	case OSS_GETVERSION:
+		return put_user(SOUND_VERSION, (int *)arg);
+
+	case SNDCTL_DSP_SYNC:
+		if (file->f_mode & FMODE_WRITE)
+			return drain_dac(s, 0/*file->f_flags & O_NONBLOCK*/);
+		return 0;
+		
+	case SNDCTL_DSP_SETDUPLEX:
+		return 0;
+
+	case SNDCTL_DSP_GETCAPS:
+		return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
+		
+        case SNDCTL_DSP_RESET:
+		if (file->f_mode & FMODE_WRITE) {
+			stop_dac(s);
+			synchronize_irq();
+			s->dma_dac.swptr = s->dma_dac.hwptr = s->dma_dac.count = s->dma_dac.total_bytes = 0;
+		}
+		if (file->f_mode & FMODE_READ) {
+			stop_adc(s);
+			synchronize_irq();
+			s->dma_adc.swptr = s->dma_adc.hwptr = s->dma_adc.count = s->dma_adc.total_bytes = 0;
+		}
+		return 0;
+
+        case SNDCTL_DSP_SPEED:
+                get_user_ret(val, (int *)arg, -EFAULT);
+		if (val >= 0) {
+			if (file->f_mode & FMODE_READ) {
+				stop_adc(s);
+				s->dma_adc.ready = 0;
+				set_adc_rate(s, val);
+			}
+			if (file->f_mode & FMODE_WRITE) {
+				stop_dac(s);
+				s->dma_dac.ready = 0;
+				set_dac_rate(s, val);
+			}
+		}
+		return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, (int *)arg);
+		
+        case SNDCTL_DSP_STEREO:
+                get_user_ret(val, (int *)arg, -EFAULT);
+		fmtd = 0;
+		fmtm = ~0;
+		if (file->f_mode & FMODE_READ) {
+			stop_adc(s);
+			s->dma_adc.ready = 0;
+			if (val)
+				fmtd |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
+			else
+				fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_ADCSHIFT);
+		}
+		if (file->f_mode & FMODE_WRITE) {
+			stop_dac(s);
+			s->dma_dac.ready = 0;
+			if (val)
+				fmtd |= CM_CFMT_STEREO << CM_CFMT_DACSHIFT;
+			else
+				fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_DACSHIFT);
+		}
+		set_fmt(s, fmtm, fmtd);
+		return 0;
+
+        case SNDCTL_DSP_CHANNELS:
+                get_user_ret(val, (int *)arg, -EFAULT);
+		if (val != 0) {
+			fmtd = 0;
+			fmtm = ~0;
+			if (file->f_mode & FMODE_READ) {
+				stop_adc(s);
+				s->dma_adc.ready = 0;
+				if (val >= 2)
+					fmtd |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
+				else
+					fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_ADCSHIFT);
+			}
+			if (file->f_mode & FMODE_WRITE) {
+				stop_dac(s);
+				s->dma_dac.ready = 0;
+				if (val >= 2)
+					fmtd |= CM_CFMT_STEREO << CM_CFMT_DACSHIFT;
+				else
+					fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_DACSHIFT);
+			}
+			set_fmt(s, fmtm, fmtd);
+		}
+		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_STEREO << CM_CFMT_ADCSHIFT) 
+					   : (CM_CFMT_STEREO << CM_CFMT_DACSHIFT))) ? 2 : 1, (int *)arg);
+		
+	case SNDCTL_DSP_GETFMTS: /* Returns a mask */
+                return put_user(AFMT_S16_LE|AFMT_U8, (int *)arg);
+		
+	case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
+		get_user_ret(val, (int *)arg, -EFAULT);
+		if (val != AFMT_QUERY) {
+			fmtd = 0;
+			fmtm = ~0;
+			if (file->f_mode & FMODE_READ) {
+				stop_adc(s);
+				s->dma_adc.ready = 0;
+				if (val == AFMT_S16_LE)
+					fmtd |= CM_CFMT_16BIT << CM_CFMT_ADCSHIFT;
+				else
+					fmtm &= ~(CM_CFMT_16BIT << CM_CFMT_ADCSHIFT);
+			}
+			if (file->f_mode & FMODE_WRITE) {
+				stop_dac(s);
+				s->dma_dac.ready = 0;
+				if (val == AFMT_S16_LE)
+					fmtd |= CM_CFMT_16BIT << CM_CFMT_DACSHIFT;
+				else
+					fmtm &= ~(CM_CFMT_16BIT << CM_CFMT_DACSHIFT);
+			}
+			set_fmt(s, fmtm, fmtd);
+		}
+		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_16BIT << CM_CFMT_ADCSHIFT) 
+					   : (CM_CFMT_16BIT << CM_CFMT_DACSHIFT))) ? AFMT_S16_LE : AFMT_U8, (int *)arg);
+		
+	case SNDCTL_DSP_POST:
+                return 0;
+
+        case SNDCTL_DSP_GETTRIGGER:
+		val = 0;
+		if (file->f_mode & FMODE_READ && s->enable & CM_CENABLE_RE) 
+			val |= PCM_ENABLE_INPUT;
+		if (file->f_mode & FMODE_WRITE && s->enable & CM_CENABLE_PE) 
+			val |= PCM_ENABLE_OUTPUT;
+		return put_user(val, (int *)arg);
+		
+	case SNDCTL_DSP_SETTRIGGER:
+		get_user_ret(val, (int *)arg, -EFAULT);
+		if (file->f_mode & FMODE_READ) {
+			if (val & PCM_ENABLE_INPUT) {
+				if (!s->dma_adc.ready && (ret =  prog_dmabuf(s, 1)))
+					return ret;
+				start_adc(s);
+			} else
+				stop_adc(s);
+		}
+		if (file->f_mode & FMODE_WRITE) {
+			if (val & PCM_ENABLE_OUTPUT) {
+				if (!s->dma_dac.ready && (ret = prog_dmabuf(s, 0)))
+					return ret;
+				start_dac(s);
+			} else
+				stop_dac(s);
+		}
+		return 0;
+
+	case SNDCTL_DSP_GETOSPACE:
+		if (!(file->f_mode & FMODE_WRITE))
+			return -EINVAL;
+		if (!(s->enable & CM_CENABLE_PE) && (val = prog_dmabuf(s, 0)) != 0)
+			return val;
+		spin_lock_irqsave(&s->lock, flags);
+		cm_update_ptr(s);
+		abinfo.fragsize = s->dma_dac.fragsize;
+                abinfo.bytes = s->dma_dac.dmasize - s->dma_dac.count;
+                abinfo.fragstotal = s->dma_dac.numfrag;
+                abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;      
+		spin_unlock_irqrestore(&s->lock, flags);
+		return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+
+	case SNDCTL_DSP_GETISPACE:
+		if (!(file->f_mode & FMODE_READ))
+			return -EINVAL;
+		if (!(s->enable & CM_CENABLE_RE) && (val = prog_dmabuf(s, 1)) != 0)
+			return val;
+		spin_lock_irqsave(&s->lock, flags);
+		cm_update_ptr(s);
+		abinfo.fragsize = s->dma_adc.fragsize;
+                abinfo.bytes = s->dma_adc.count;
+                abinfo.fragstotal = s->dma_adc.numfrag;
+                abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;      
+		spin_unlock_irqrestore(&s->lock, flags);
+		return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+		
+        case SNDCTL_DSP_NONBLOCK:
+                file->f_flags |= O_NONBLOCK;
+                return 0;
+
+        case SNDCTL_DSP_GETODELAY:
+		if (!(file->f_mode & FMODE_WRITE))
+			return -EINVAL;
+		spin_lock_irqsave(&s->lock, flags);
+		cm_update_ptr(s);
+                val = s->dma_dac.count;
+		spin_unlock_irqrestore(&s->lock, flags);
+		return put_user(val, (int *)arg);
+
+        case SNDCTL_DSP_GETIPTR:
+		if (!(file->f_mode & FMODE_READ))
+			return -EINVAL;
+		spin_lock_irqsave(&s->lock, flags);
+		cm_update_ptr(s);
+                cinfo.bytes = s->dma_adc.total_bytes;
+                cinfo.blocks = s->dma_adc.count >> s->dma_adc.fragshift;
+                cinfo.ptr = s->dma_adc.hwptr;
+		if (s->dma_adc.mapped)
+			s->dma_adc.count &= s->dma_adc.fragsize-1;
+		spin_unlock_irqrestore(&s->lock, flags);
+                return copy_to_user((void *)arg, &cinfo, sizeof(cinfo));
+
+        case SNDCTL_DSP_GETOPTR:
+		if (!(file->f_mode & FMODE_WRITE))
+			return -EINVAL;
+		spin_lock_irqsave(&s->lock, flags);
+		cm_update_ptr(s);
+                cinfo.bytes = s->dma_dac.total_bytes;
+                cinfo.blocks = s->dma_dac.count >> s->dma_dac.fragshift;
+                cinfo.ptr = s->dma_dac.hwptr;
+		if (s->dma_dac.mapped)
+			s->dma_dac.count &= s->dma_dac.fragsize-1;
+		spin_unlock_irqrestore(&s->lock, flags);
+                return copy_to_user((void *)arg, &cinfo, sizeof(cinfo));
+
+        case SNDCTL_DSP_GETBLKSIZE:
+		if (file->f_mode & FMODE_WRITE) {
+			if ((val = prog_dmabuf(s, 0)))
+				return val;
+			return put_user(s->dma_dac.fragsize, (int *)arg);
+		}
+		if ((val = prog_dmabuf(s, 1)))
+			return val;
+		return put_user(s->dma_adc.fragsize, (int *)arg);
+
+        case SNDCTL_DSP_SETFRAGMENT:
+                get_user_ret(val, (int *)arg, -EFAULT);
+		if (file->f_mode & FMODE_READ) {
+			s->dma_adc.ossfragshift = val & 0xffff;
+			s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
+			if (s->dma_adc.ossfragshift < 4)
+				s->dma_adc.ossfragshift = 4;
+			if (s->dma_adc.ossfragshift > 15)
+				s->dma_adc.ossfragshift = 15;
+			if (s->dma_adc.ossmaxfrags < 4)
+				s->dma_adc.ossmaxfrags = 4;
+		}
+		if (file->f_mode & FMODE_WRITE) {
+			s->dma_dac.ossfragshift = val & 0xffff;
+			s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
+			if (s->dma_dac.ossfragshift < 4)
+				s->dma_dac.ossfragshift = 4;
+			if (s->dma_dac.ossfragshift > 15)
+				s->dma_dac.ossfragshift = 15;
+			if (s->dma_dac.ossmaxfrags < 4)
+				s->dma_dac.ossmaxfrags = 4;
+		}
+		return 0;
+
+        case SNDCTL_DSP_SUBDIVIDE:
+		if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
+		    (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
+			return -EINVAL;
+                get_user_ret(val, (int *)arg, -EFAULT);
+		if (val != 1 && val != 2 && val != 4)
+			return -EINVAL;
+		if (file->f_mode & FMODE_READ)
+			s->dma_adc.subdivision = val;
+		if (file->f_mode & FMODE_WRITE)
+			s->dma_dac.subdivision = val;
+		return 0;
+
+        case SOUND_PCM_READ_RATE:
+		return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, (int *)arg);
+
+        case SOUND_PCM_READ_CHANNELS:
+		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_STEREO << CM_CFMT_ADCSHIFT) : (CM_CFMT_STEREO << CM_CFMT_DACSHIFT))) ? 2 : 1, (int *)arg);
+
+        case SOUND_PCM_READ_BITS:
+		return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_16BIT << CM_CFMT_ADCSHIFT) : (CM_CFMT_16BIT << CM_CFMT_DACSHIFT))) ? 16 : 8, (int *)arg);
+
+        case SOUND_PCM_WRITE_FILTER:
+        case SNDCTL_DSP_SETSYNCRO:
+        case SOUND_PCM_READ_FILTER:
+                return -EINVAL;
+		
+	}
+	return mixer_ioctl(s, cmd, arg);
+}
+
+static int cm_open(struct inode *inode, struct file *file)
+{
+	int minor = MINOR(inode->i_rdev);
+	struct cm_state *s = devs;
+	unsigned char fmtm = ~0, fmts = 0;
+
+	while (s && ((s->dev_audio ^ minor) & ~0xf))
+		s = s->next;
+	if (!s)
+		return -ENODEV;
+       	VALIDATE_STATE(s);
+	file->private_data = s;
+	/* wait for device to become free */
+	down(&s->open_sem);
+	while (s->open_mode & file->f_mode) {
+		if (file->f_flags & O_NONBLOCK) {
+			up(&s->open_sem);
+			return -EBUSY;
+		}
+		up(&s->open_sem);
+		interruptible_sleep_on(&s->open_wait);
+		if (signal_pending(current))
+			return -ERESTARTSYS;
+		down(&s->open_sem);
+	}
+	if (file->f_mode & FMODE_READ) {
+		fmtm &= ~((CM_CFMT_STEREO | CM_CFMT_16BIT) << CM_CFMT_ADCSHIFT);
+		if ((minor & 0xf) == SND_DEV_DSP16)
+			fmts |= CM_CFMT_16BIT << CM_CFMT_ADCSHIFT;
+		s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags = s->dma_adc.subdivision = 0;
+		set_adc_rate(s, 8000);
+	}
+	if (file->f_mode & FMODE_WRITE) {
+		fmtm &= ~((CM_CFMT_STEREO | CM_CFMT_16BIT) << CM_CFMT_DACSHIFT);
+		if ((minor & 0xf) == SND_DEV_DSP16)
+			fmts |= CM_CFMT_16BIT << CM_CFMT_DACSHIFT;
+		s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags = s->dma_dac.subdivision = 0;
+		set_dac_rate(s, 8000);
+	}
+	set_fmt(s, fmtm, fmts);
+	s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
+	up(&s->open_sem);
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int cm_release(struct inode *inode, struct file *file)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+
+	VALIDATE_STATE(s);
+	if (file->f_mode & FMODE_WRITE)
+		drain_dac(s, file->f_flags & O_NONBLOCK);
+	down(&s->open_sem);
+	if (file->f_mode & FMODE_WRITE) {
+		stop_dac(s);
+		dealloc_dmabuf(&s->dma_dac);
+	}
+	if (file->f_mode & FMODE_READ) {
+		stop_adc(s);
+		dealloc_dmabuf(&s->dma_adc);
+	}
+	s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
+	up(&s->open_sem);
+	wake_up(&s->open_wait);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static /*const*/ struct file_operations cm_audio_fops = {
+	&cm_llseek,
+	&cm_read,
+	&cm_write,
+	NULL,  /* readdir */
+	&cm_poll,
+	&cm_ioctl,
+	&cm_mmap,
+	&cm_open,
+	NULL,	/* flush */
+	&cm_release,
+	NULL,  /* fsync */
+	NULL,  /* fasync */
+	NULL,  /* check_media_change */
+	NULL,  /* revalidate */
+	NULL,  /* lock */
+};
+
+#ifdef CONFIG_SOUND_CMPCI_MIDI
+/* --------------------------------------------------------------------- */
+
+static ssize_t cm_midi_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	ssize_t ret;
+	unsigned long flags;
+	unsigned ptr;
+	int cnt;
+
+	VALIDATE_STATE(s);
+	if (ppos != &file->f_pos)
+		return -ESPIPE;
+	if (!access_ok(VERIFY_WRITE, buffer, count))
+		return -EFAULT;
+	ret = 0;
+	while (count > 0) {
+		spin_lock_irqsave(&s->lock, flags);
+		ptr = s->midi.ird;
+		cnt = MIDIINBUF - ptr;
+		if (s->midi.icnt < cnt)
+			cnt = s->midi.icnt;
+		spin_unlock_irqrestore(&s->lock, flags);
+		if (cnt > count)
+			cnt = count;
+		if (cnt <= 0) {
+			if (file->f_flags & O_NONBLOCK)
+				return ret ? ret : -EAGAIN;
+			interruptible_sleep_on(&s->midi.iwait);
+			if (signal_pending(current))
+				return ret ? ret : -ERESTARTSYS;
+			continue;
+		}
+		if (copy_to_user(buffer, s->midi.ibuf + ptr, cnt))
+			return ret ? ret : -EFAULT;
+		ptr = (ptr + cnt) % MIDIINBUF;
+		spin_lock_irqsave(&s->lock, flags);
+		s->midi.ird = ptr;
+		s->midi.icnt -= cnt;
+		spin_unlock_irqrestore(&s->lock, flags);
+		count -= cnt;
+		buffer += cnt;
+		ret += cnt;
+	}
+	return ret;
+}
+
+static ssize_t cm_midi_write(struct file *file, const char *buffer, size_t count, loff_t *ppos)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	ssize_t ret;
+	unsigned long flags;
+	unsigned ptr;
+	int cnt;
+
+	VALIDATE_STATE(s);
+	if (ppos != &file->f_pos)
+		return -ESPIPE;
+	if (!access_ok(VERIFY_READ, buffer, count))
+		return -EFAULT;
+	ret = 0;
+	while (count > 0) {
+		spin_lock_irqsave(&s->lock, flags);
+		ptr = s->midi.owr;
+		cnt = MIDIOUTBUF - ptr;
+		if (s->midi.ocnt + cnt > MIDIOUTBUF)
+			cnt = MIDIOUTBUF - s->midi.ocnt;
+		if (cnt <= 0)
+			cm_handle_midi(s);
+		spin_unlock_irqrestore(&s->lock, flags);
+		if (cnt > count)
+			cnt = count;
+		if (cnt <= 0) {
+			if (file->f_flags & O_NONBLOCK)
+				return ret ? ret : -EAGAIN;
+			interruptible_sleep_on(&s->midi.owait);
+			if (signal_pending(current))
+				return ret ? ret : -ERESTARTSYS;
+			continue;
+		}
+		if (copy_from_user(s->midi.obuf + ptr, buffer, cnt))
+			return ret ? ret : -EFAULT;
+		ptr = (ptr + cnt) % MIDIOUTBUF;
+		spin_lock_irqsave(&s->lock, flags);
+		s->midi.owr = ptr;
+		s->midi.ocnt += cnt;
+		spin_unlock_irqrestore(&s->lock, flags);
+		count -= cnt;
+		buffer += cnt;
+		ret += cnt;
+		spin_lock_irqsave(&s->lock, flags);
+		cm_handle_midi(s);
+		spin_unlock_irqrestore(&s->lock, flags);
+	}
+	return ret;
+}
+
+static unsigned int cm_midi_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	unsigned long flags;
+	unsigned int mask = 0;
+
+	VALIDATE_STATE(s);
+	if (file->f_mode & FMODE_WRITE)
+		poll_wait(file, &s->midi.owait, wait);
+	if (file->f_mode & FMODE_READ)
+		poll_wait(file, &s->midi.iwait, wait);
+	spin_lock_irqsave(&s->lock, flags);
+	if (file->f_mode & FMODE_READ) {
+		if (s->midi.icnt > 0)
+			mask |= POLLIN | POLLRDNORM;
+	}
+	if (file->f_mode & FMODE_WRITE) {
+		if (s->midi.ocnt < MIDIOUTBUF)
+			mask |= POLLOUT | POLLWRNORM;
+	}
+	spin_unlock_irqrestore(&s->lock, flags);
+	return mask;
+}
+
+static int cm_midi_open(struct inode *inode, struct file *file)
+{
+	int minor = MINOR(inode->i_rdev);
+	struct cm_state *s = devs;
+	unsigned long flags;
+
+	while (s && s->dev_midi != minor)
+		s = s->next;
+	if (!s)
+		return -ENODEV;
+       	VALIDATE_STATE(s);
+	file->private_data = s;
+	/* wait for device to become free */
+	down(&s->open_sem);
+	while (s->open_mode & (file->f_mode << FMODE_MIDI_SHIFT)) {
+		if (file->f_flags & O_NONBLOCK) {
+			up(&s->open_sem);
+			return -EBUSY;
+		}
+		up(&s->open_sem);
+		interruptible_sleep_on(&s->open_wait);
+		if (signal_pending(current))
+			return -ERESTARTSYS;
+		down(&s->open_sem);
+	}
+	spin_lock_irqsave(&s->lock, flags);
+	if (!(s->open_mode & (FMODE_MIDI_READ | FMODE_MIDI_WRITE))) {
+		s->midi.ird = s->midi.iwr = s->midi.icnt = 0;
+		s->midi.ord = s->midi.owr = s->midi.ocnt = 0;
+		/* enable MPU-401 */
+		outb(inb(s->iobase + CODEC_CMI_FUNCTRL1) | 4, s->iobase + CODEC_CMI_FUNCTRL1);
+		outb(0xff, s->iomidi+1); /* reset command */
+		if (!(inb(s->iomidi+1) & 0x80))
+			inb(s->iomidi);
+		outb(0x3f, s->iomidi+1); /* uart command */
+		if (!(inb(s->iomidi+1) & 0x80))
+			inb(s->iomidi);
+		s->midi.ird = s->midi.iwr = s->midi.icnt = 0;
+		init_timer(&s->midi.timer);
+		s->midi.timer.expires = jiffies+1;
+		s->midi.timer.data = (unsigned long)s;
+		s->midi.timer.function = cm_midi_timer;
+		add_timer(&s->midi.timer);
+	}
+	if (file->f_mode & FMODE_READ) {
+		s->midi.ird = s->midi.iwr = s->midi.icnt = 0;
+	}
+	if (file->f_mode & FMODE_WRITE) {
+		s->midi.ord = s->midi.owr = s->midi.ocnt = 0;
+	}
+	spin_unlock_irqrestore(&s->lock, flags);
+	s->open_mode |= (file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE);
+	up(&s->open_sem);
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int cm_midi_release(struct inode *inode, struct file *file)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+        struct wait_queue wait = { current, NULL };
+	unsigned long flags;
+	unsigned count, tmo;
+
+	VALIDATE_STATE(s);
+
+	if (file->f_mode & FMODE_WRITE) {
+		current->state = TASK_INTERRUPTIBLE;
+		add_wait_queue(&s->midi.owait, &wait);
+		for (;;) {
+			spin_lock_irqsave(&s->lock, flags);
+			count = s->midi.ocnt;
+			spin_unlock_irqrestore(&s->lock, flags);
+			if (count <= 0)
+				break;
+			if (signal_pending(current))
+				break;
+			if (file->f_flags & O_NONBLOCK) {
+				remove_wait_queue(&s->midi.owait, &wait);
+				current->state = TASK_RUNNING;
+				return -EBUSY;
+			}
+			tmo = (count * HZ) / 3100;
+			if (!schedule_timeout(tmo ? : 1) && tmo)
+				printk(KERN_DEBUG "cm: midi timed out??\n");
+		}
+		remove_wait_queue(&s->midi.owait, &wait);
+		current->state = TASK_RUNNING;
+	}
+	down(&s->open_sem);
+	s->open_mode &= (~(file->f_mode << FMODE_MIDI_SHIFT)) & (FMODE_MIDI_READ|FMODE_MIDI_WRITE);
+	spin_lock_irqsave(&s->lock, flags);
+	if (!(s->open_mode & (FMODE_MIDI_READ | FMODE_MIDI_WRITE))) {
+		del_timer(&s->midi.timer);		
+		outb(0xff, s->iomidi+1); /* reset command */
+		if (!(inb(s->iomidi+1) & 0x80))
+			inb(s->iomidi);
+		/* disable MPU-401 */
+		outb(inb(s->iobase + CODEC_CMI_FUNCTRL1) & ~4, s->iobase + CODEC_CMI_FUNCTRL1);
+	}
+	spin_unlock_irqrestore(&s->lock, flags);
+	up(&s->open_sem);
+	wake_up(&s->open_wait);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static /*const*/ struct file_operations cm_midi_fops = {
+	&cm_llseek,
+	&cm_midi_read,
+	&cm_midi_write,
+	NULL,  /* readdir */
+	&cm_midi_poll,
+	NULL,  /* ioctl */
+	NULL,  /* mmap */
+	&cm_midi_open,
+	NULL,	/* flush */
+	&cm_midi_release,
+	NULL,  /* fsync */
+	NULL,  /* fasync */
+	NULL,  /* check_media_change */
+	NULL,  /* revalidate */
+	NULL,  /* lock */
+};
+#endif
+
+/* --------------------------------------------------------------------- */
+
+#ifdef CONFIG_SOUND_CMPCI_FM
+static int cm_dmfm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	static const unsigned char op_offset[18] = {
+		0x00, 0x01, 0x02, 0x03, 0x04, 0x05,
+		0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D,
+		0x10, 0x11, 0x12, 0x13, 0x14, 0x15
+	};
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	struct dm_fm_voice v;
+	struct dm_fm_note n;
+	struct dm_fm_params p;
+	unsigned int io;
+	unsigned int regb;
+
+	switch (cmd) {		
+	case FM_IOCTL_RESET:
+		for (regb = 0xb0; regb < 0xb9; regb++) {
+			outb(regb, s->iosynth);
+			outb(0, s->iosynth+1);
+			outb(regb, s->iosynth+2);
+			outb(0, s->iosynth+3);
+		}
+		return 0;
+
+	case FM_IOCTL_PLAY_NOTE:
+		if (copy_from_user(&n, (void *)arg, sizeof(n)))
+			return -EFAULT;
+		if (n.voice >= 18)
+			return -EINVAL;
+		if (n.voice >= 9) {
+			regb = n.voice - 9;
+			io = s->iosynth+2;
+		} else {
+			regb = n.voice;
+			io = s->iosynth;
+		}
+		outb(0xa0 + regb, io);
+		outb(n.fnum & 0xff, io+1);
+		outb(0xb0 + regb, io);
+		outb(((n.fnum >> 8) & 3) | ((n.octave & 7) << 2) | ((n.key_on & 1) << 5), io+1);
+		return 0;
+
+	case FM_IOCTL_SET_VOICE:
+		if (copy_from_user(&v, (void *)arg, sizeof(v)))
+			return -EFAULT;
+		if (v.voice >= 18)
+			return -EINVAL;
+		regb = op_offset[v.voice];
+		io = s->iosynth + ((v.op & 1) << 1);
+		outb(0x20 + regb, io);
+		outb(((v.am & 1) << 7) | ((v.vibrato & 1) << 6) | ((v.do_sustain & 1) << 5) | 
+		     ((v.kbd_scale & 1) << 4) | (v.harmonic & 0xf), io+1);
+		outb(0x40 + regb, io);
+		outb(((v.scale_level & 0x3) << 6) | (v.volume & 0x3f), io+1);
+		outb(0x60 + regb, io);
+		outb(((v.attack & 0xf) << 4) | (v.decay & 0xf), io+1);
+		outb(0x80 + regb, io);
+		outb(((v.sustain & 0xf) << 4) | (v.release & 0xf), io+1);
+		outb(0xe0 + regb, io);
+		outb(v.waveform & 0x7, io+1);
+		if (n.voice >= 9) {
+			regb = n.voice - 9;
+			io = s->iosynth+2;
+		} else {
+			regb = n.voice;
+			io = s->iosynth;
+		}
+		outb(0xc0 + regb, io);
+		outb(((v.right & 1) << 5) | ((v.left & 1) << 4) | ((v.feedback & 7) << 1) |
+		     (v.connection & 1), io+1);
+		return 0;
+		
+	case FM_IOCTL_SET_PARAMS:
+		if (copy_from_user(&p, (void *)arg, sizeof(p)))
+			return -EFAULT;
+		outb(0x08, s->iosynth);
+		outb((p.kbd_split & 1) << 6, s->iosynth+1);
+		outb(0xbd, s->iosynth);
+		outb(((p.am_depth & 1) << 7) | ((p.vib_depth & 1) << 6) | ((p.rhythm & 1) << 5) | ((p.bass & 1) << 4) |
+		     ((p.snare & 1) << 3) | ((p.tomtom & 1) << 2) | ((p.cymbal & 1) << 1) | (p.hihat & 1), s->iosynth+1);
+		return 0;
+
+	case FM_IOCTL_SET_OPL:
+		outb(4, s->iosynth+2);
+		outb(arg, s->iosynth+3);
+		return 0;
+
+	case FM_IOCTL_SET_MODE:
+		outb(5, s->iosynth+2);
+		outb(arg & 1, s->iosynth+3);
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static int cm_dmfm_open(struct inode *inode, struct file *file)
+{
+	int minor = MINOR(inode->i_rdev);
+	struct cm_state *s = devs;
+
+	while (s && s->dev_dmfm != minor)
+		s = s->next;
+	if (!s)
+		return -ENODEV;
+       	VALIDATE_STATE(s);
+	file->private_data = s;
+	/* wait for device to become free */
+	down(&s->open_sem);
+	while (s->open_mode & FMODE_DMFM) {
+		if (file->f_flags & O_NONBLOCK) {
+			up(&s->open_sem);
+			return -EBUSY;
+		}
+		up(&s->open_sem);
+		interruptible_sleep_on(&s->open_wait);
+		if (signal_pending(current))
+			return -ERESTARTSYS;
+		down(&s->open_sem);
+	}
+	/* init the stuff */
+	outb(1, s->iosynth);
+	outb(0x20, s->iosynth+1); /* enable waveforms */
+	outb(4, s->iosynth+2);
+	outb(0, s->iosynth+3);  /* no 4op enabled */
+	outb(5, s->iosynth+2);
+	outb(1, s->iosynth+3);  /* enable OPL3 */
+	s->open_mode |= FMODE_DMFM;
+	up(&s->open_sem);
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int cm_dmfm_release(struct inode *inode, struct file *file)
+{
+	struct cm_state *s = (struct cm_state *)file->private_data;
+	unsigned int regb;
+
+	VALIDATE_STATE(s);
+	down(&s->open_sem);
+	s->open_mode &= ~FMODE_DMFM;
+	for (regb = 0xb0; regb < 0xb9; regb++) {
+		outb(regb, s->iosynth);
+		outb(0, s->iosynth+1);
+		outb(regb, s->iosynth+2);
+		outb(0, s->iosynth+3);
+	}
+	up(&s->open_sem);
+	wake_up(&s->open_wait);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static /*const*/ struct file_operations cm_dmfm_fops = {
+	&cm_llseek,
+	NULL,  /* read */
+	NULL,  /* write */
+	NULL,  /* readdir */
+	NULL,  /* poll */
+	&cm_dmfm_ioctl,
+	NULL,  /* mmap */
+	&cm_dmfm_open,
+	NULL,	/* flush */
+	&cm_dmfm_release,
+	NULL,  /* fsync */
+	NULL,  /* fasync */
+	NULL,  /* check_media_change */
+	NULL,  /* revalidate */
+	NULL,  /* lock */
+};
+#endif /* CONFIG_SOUND_CMPCI_FM */
+
+/* --------------------------------------------------------------------- */
+
+/* maximum number of devices */
+#define NR_DEVICE 5
+
+#if 0
+static int reverb[NR_DEVICE] = { 0, };
+
+static int wavetable[NR_DEVICE] = { 0, };
+#endif
+
+/* --------------------------------------------------------------------- */
+
+static struct initvol {
+	int mixch;
+	int vol;
+} initvol[] __initdata = {
+	{ SOUND_MIXER_WRITE_CD, 0x4040 },
+	{ SOUND_MIXER_WRITE_LINE, 0x4040 },
+	{ SOUND_MIXER_WRITE_MIC, 0x4040 },
+	{ SOUND_MIXER_WRITE_SYNTH, 0x4040 },
+	{ SOUND_MIXER_WRITE_VOLUME, 0x4040 },
+	{ SOUND_MIXER_WRITE_PCM, 0x4040 }
+};
+
+#ifdef MODULE
+__initfunc(int init_module(void))
+#else
+__initfunc(int init_cmpci(void))
+#endif
+{
+	struct cm_state *s;
+	struct pci_dev *pcidev = NULL;
+	mm_segment_t fs;
+	int i, val, index = 0;
+	struct {
+		unsigned short	deviceid;
+		char		*devicename;
+	} devicetable[] =
+	{
+		{ PCI_DEVICE_ID_CMEDIA_CM8338A, "CM8338A" },
+		{ PCI_DEVICE_ID_CMEDIA_CM8338B, "CM8338B" },
+		{ PCI_DEVICE_ID_CMEDIA_CM8738,  "CM8738" },
+	};
+	char	*devicename = "unknown";
+
+#ifdef CONFIG_PCI
+	if (!pci_present())   /* No PCI bus in this machine! */
+#endif
+		return -ENODEV;
+	printk(KERN_INFO "cm: version v1.1 time " __TIME__ " " __DATE__ "\n");
+#if 0
+	if (!(wavetable_mem = __get_free_pages(GFP_KERNEL, 20-PAGE_SHIFT)))
+		printk(KERN_INFO "cm: cannot allocate 1MB of contiguous nonpageable memory for wavetable data\n");
+#endif
+	while (index < NR_DEVICE && pcidev == NULL && (
+ 	       (pcidev = pci_find_device(PCI_VENDOR_ID_CMEDIA, PCI_DEVICE_ID_CMEDIA_CM8338A, pcidev)) ||
+	       (pcidev = pci_find_device(PCI_VENDOR_ID_CMEDIA, PCI_DEVICE_ID_CMEDIA_CM8338B, pcidev)) ||
+	       (pcidev = pci_find_device(PCI_VENDOR_ID_CMEDIA, PCI_DEVICE_ID_CMEDIA_CM8738, pcidev)))) {
+		if (pcidev->irq == 0)
+			continue;
+		if (!(s = kmalloc(sizeof(struct cm_state), GFP_KERNEL))) {
+			printk(KERN_WARNING "cm: out of memory\n");
+			continue;
+		}
+		/* search device name */
+		for (i = 0; i < sizeof(devicetable) / sizeof(devicetable[0]); i++)
+		{
+			if (devicetable[i].deviceid == pcidev->device)
+			{
+				devicename = devicetable[i].devicename;
+				break;
+			}
+		}
+		memset(s, 0, sizeof(struct cm_state));
+		init_waitqueue(&s->dma_adc.wait);
+		init_waitqueue(&s->dma_dac.wait);
+		init_waitqueue(&s->open_wait);
+		init_waitqueue(&s->midi.iwait);
+		init_waitqueue(&s->midi.owait);
+		s->open_sem = MUTEX;
+		s->magic = CM_MAGIC;
+		s->iobase = pcidev->base_address[0] & PCI_BASE_ADDRESS_IO_MASK;
+#ifdef CONFIG_SOUND_CMPCI_FM
+		s->iosynth = 0x388;
+#endif
+#ifdef CONFIG_SOUND_CMPCI_MIDI
+		s->iomidi = 0x330;
+#endif
+		if (s->iobase == 0)
+			continue;
+		s->irq = pcidev->irq;
+
+		if (check_region(s->iobase, CM_EXTENT_CODEC)) {
+			printk(KERN_ERR "cm: io ports %#x-%#x in use\n", s->iobase, s->iobase+CM_EXTENT_CODEC-1);
+			goto err_region5;
+		}
+		request_region(s->iobase, CM_EXTENT_CODEC, "cmpci");
+#ifdef CONFIG_SOUND_CMPCI_MIDI
+		if (check_region(s->iomidi, CM_EXTENT_MIDI)) {
+			printk(KERN_ERR "cm: io ports %#x-%#x in use\n", s->iomidi, s->iomidi+CM_EXTENT_MIDI-1);
+			goto err_region4;
+		}
+		request_region(s->iomidi, CM_EXTENT_MIDI, "cmpci Midi");
+		/* set IO based at 0x330 */
+		outb(inb(s->iobase + CODEC_CMI_LEGACY_CTRL + 3) & ~0x60, s->iobase + CODEC_CMI_LEGACY_CTRL + 3);
+#endif
+#ifdef CONFIG_SOUND_CMPCI_FM
+		if (check_region(s->iosynth, CM_EXTENT_SYNTH)) {
+			printk(KERN_ERR "cm: io ports %#x-%#x in use\n", s->iosynth, s->iosynth+CM_EXTENT_SYNTH-1);
+			goto err_region1;
+		}
+		request_region(s->iosynth, CM_EXTENT_SYNTH, "cmpci FM");
+		/* enable FM */
+		outb(inb(s->iobase + CODEC_CMI_MISC_CTRL + 2) | 8, s->iobase + CODEC_CMI_MISC_CTRL);
+#endif
+		/* initialize codec registers */
+		outb(0, s->iobase + CODEC_CMI_INT_HLDCLR + 2);  /* disable ints */
+		outb(0, s->iobase + CODEC_CMI_FUNCTRL0 + 2); /* reset channels */
+		/* reset mixer */
+		wrmixer(s, DSP_MIX_DATARESETIDX, 0);
+
+		/* request irq */
+		if (request_irq(s->irq, cm_interrupt, SA_SHIRQ, "cmpci", s)) {
+			printk(KERN_ERR "cm: irq %u in use\n", s->irq);
+			goto err_irq;
+		}
+		printk(KERN_INFO "cm: found %s adapter at io %#06x irq %u\n",
+		       devicename, s->iobase, s->irq);
+		/* register devices */
+		if ((s->dev_audio = register_sound_dsp(&cm_audio_fops, -1)) < 0)
+			goto err_dev1;
+		if ((s->dev_mixer = register_sound_mixer(&cm_mixer_fops, -1)) < 0)
+			goto err_dev2;
+#ifdef CONFIG_SOUND_CMPCI_MIDI
+		if ((s->dev_midi = register_sound_midi(&cm_midi_fops, -1)) < 0)
+			goto err_dev3;
+#endif
+#ifdef CONFIG_SOUND_CMPCI_FM
+		if ((s->dev_dmfm = register_sound_special(&cm_dmfm_fops, 15 /* ?? */)) < 0)
+			goto err_dev4;
+#endif
+		/* initialize the chips */
+		fs = get_fs();
+		set_fs(KERNEL_DS);
+		/* set mixer output */
+		frobindir(s, DSP_MIX_OUTMIXIDX, 0x1f, 0x1f);
+		/* set mixer input */
+		val = SOUND_MASK_LINE|SOUND_MASK_SYNTH|SOUND_MASK_CD|SOUND_MASK_MIC;
+		mixer_ioctl(s, SOUND_MIXER_WRITE_RECSRC, (unsigned long)&val);
+		for (i = 0; i < sizeof(initvol)/sizeof(initvol[0]); i++) {
+			val = initvol[i].vol;
+			mixer_ioctl(s, initvol[i].mixch, (unsigned long)&val);
+		}
+		set_fs(fs);
+		/* queue it for later freeing */
+		s->next = devs;
+		devs = s;
+		index++;
+		continue;
+
+	err_dev4:
+		unregister_sound_midi(s->dev_midi);
+	err_dev3:
+		unregister_sound_mixer(s->dev_mixer);
+	err_dev2:
+		unregister_sound_dsp(s->dev_audio);
+	err_dev1:
+		printk(KERN_ERR "cm: cannot register misc device\n");
+		free_irq(s->irq, s);
+	err_irq:
+#ifdef CONFIG_SOUND_CMPCI_FM
+		release_region(s->iosynth, CM_EXTENT_SYNTH);
+	err_region1:
+#endif
+#ifdef CONFIG_SOUND_CMPCI_MIDI
+		release_region(s->iomidi, CM_EXTENT_MIDI);
+#endif
+	err_region4:
+		release_region(s->iobase, CM_EXTENT_CODEC);
+	err_region5:
+		kfree_s(s, sizeof(struct cm_state));
+	}
+	if (!devs) {
+		if (wavetable_mem)
+			free_pages(wavetable_mem, 20-PAGE_SHIFT);
+		return -ENODEV;
+	}
+	return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+#ifdef MODULE
+
+#if 0
+MODULE_PARM(wavetable, "1-" __MODULE_STRING(NR_DEVICE) "i");
+MODULE_PARM_DESC(wavetable, "if 1 the wavetable synth is enabled");
+#endif
+
+MODULE_AUTHOR("ChenLi Tien, cltien@home.com");
+MODULE_DESCRIPTION("CMPCI Audio Driver");
+
+void cleanup_module(void)
+{
+	struct cm_state *s;
+
+	while ((s = devs)) {
+		devs = devs->next;
+		outb(0, s->iobase + CODEC_CMI_INT_HLDCLR + 2);  /* disable ints */
+		synchronize_irq();
+		outb(0, s->iobase + CODEC_CMI_FUNCTRL0 + 2); /* reset channels */
+		free_irq(s->irq, s);
+
+		/* reset mixer */
+		wrmixer(s, DSP_MIX_DATARESETIDX, 0);
+
+		release_region(s->iobase, CM_EXTENT_CODEC);
+#ifdef CONFIG_SOUND_CMPCI_MIDI
+		release_region(s->iomidi, CM_EXTENT_MIDI);
+#endif
+#ifdef CONFIG_SOUND_CMPCI_FM
+		release_region(s->iosynth, CM_EXTENT_SYNTH);
+#endif
+		unregister_sound_dsp(s->dev_audio);
+		unregister_sound_mixer(s->dev_mixer);
+#ifdef CONFIG_SOUND_CMPCI_MIDI
+		unregister_sound_midi(s->dev_midi);
+#endif
+#ifdef CONFIG_SOUND_CMPCI_FM
+		unregister_sound_special(s->dev_dmfm);
+#endif
+		kfree_s(s, sizeof(struct cm_state));
+	}
+	if (wavetable_mem)
+		free_pages(wavetable_mem, 20-PAGE_SHIFT);
+	printk(KERN_INFO "cm: unloading\n");
+}
+
+#endif /* MODULE */

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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)