## Automatically generated incremental diff
## From:   linux-2.2.20-pre4
## To:     linux-2.2.20-pre5
## Robot:  $Id: make-incremental-diff,v 1.8 2001/12/04 06:05:04 hpa Exp $

diff -urN linux-2.2.20-pre4/Makefile linux/Makefile
--- linux-2.2.20-pre4/Makefile	Mon Dec  3 22:19:15 2001
+++ linux/Makefile	Mon Dec  3 22:19:22 2001
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 2
 SUBLEVEL = 20
-EXTRAVERSION = pre4
+EXTRAVERSION = pre5
 
 ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/)
 
diff -urN linux-2.2.20-pre4/drivers/sound/ad1848.c linux/drivers/sound/ad1848.c
--- linux-2.2.20-pre4/drivers/sound/ad1848.c	Wed Dec 31 16:00:00 1969
+++ linux/drivers/sound/ad1848.c	Sun Mar 25 08:31:34 2001
@@ -0,0 +1,2761 @@
+/*
+ * sound/ad1848.c
+ *
+ * The low level driver for the AD1848/CS4248 codec chip which
+ * is used for example in the MS Sound System.
+ *
+ * The CS4231 which is used in the GUS MAX and some other cards is
+ * upwards compatible with AD1848 and this driver is able to drive it.
+ *
+ * CS4231A and AD1845 are upward compatible with CS4231. However
+ * the new features of these chips are different.
+ *
+ * CS4232 is a PnP audio chip which contains a CS4231A (and SB, MPU).
+ * CS4232A is an improved version of CS4232.
+ *
+ *
+ *
+ * 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)
+ *		     general sleep/wakeup clean up.
+ * Alan Cox	   : reformatted. Fixed SMP bugs. Moved to kernel alloc/free
+ *		     of irqs. Use dev_id.
+ *
+ * Status:
+ *		Tested. Believed fully functional.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/stddef.h>
+
+#include "soundmodule.h"
+
+#define DEB(x)
+#define DEB1(x)
+#include "sound_config.h"
+
+#ifdef CONFIG_AD1848
+
+#include "ad1848_mixer.h"
+
+typedef struct
+{
+	int             base;
+	int             irq;
+	int             dma1, dma2;
+	int             dual_dma;	/* 1, when two DMA channels allocated */
+	unsigned char   MCE_bit;
+	unsigned char   saved_regs[32];
+	int             debug_flag;
+
+	int             audio_flags;
+	int             record_dev, playback_dev;
+
+	int             xfer_count;
+	int             audio_mode;
+	int             open_mode;
+	int             intr_active;
+	char           *chip_name, *name;
+	int             model;
+#define MD_1848		1
+#define MD_4231		2
+#define MD_4231A	3
+#define MD_1845		4
+#define MD_4232		5
+#define MD_C930		6
+#define MD_IWAVE	7
+#define MD_4235         8 /* Crystal Audio CS4235  */
+#define MD_1845_SSCAPE  9 /* Ensoniq Soundscape PNP*/
+
+	/* Mixer parameters */
+	int             recmask;
+	int             supported_devices, orig_devices;
+	int             supported_rec_devices, orig_rec_devices;
+	int            *levels;
+	short           mixer_reroute[32];
+	int             dev_no;
+	volatile unsigned long timer_ticks;
+	int             timer_running;
+	int             irq_ok;
+	mixer_ents     *mix_devices;
+	int             mixer_output_port;
+} ad1848_info;
+
+typedef struct ad1848_port_info
+{
+	int             open_mode;
+	int             speed;
+	unsigned char   speed_bits;
+	int             channels;
+	int             audio_format;
+	unsigned char   format_bits;
+}
+ad1848_port_info;
+
+static int nr_ad1848_devs = 0;
+int deskpro_xl = 0;
+int deskpro_m = 0;
+#ifdef CONFIG_SOUND_SPRO
+int soundpro = 1;
+#else
+int soundpro = 0;
+#endif
+
+static volatile signed char irq2dev[17] = {
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1, -1
+};
+
+#if defined(CONFIG_SEQUENCER) && !defined(EXCLUDE_TIMERS) || defined(MODULE)
+
+static int timer_installed = -1;
+
+#endif
+
+static int ad_format_mask[10 /*devc->model */ ] =
+{
+	0,
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW,
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW | AFMT_S16_BE | AFMT_IMA_ADPCM,
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW | AFMT_S16_BE | AFMT_IMA_ADPCM,
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW,	/* AD1845 */
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW | AFMT_S16_BE | AFMT_IMA_ADPCM,
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW | AFMT_S16_BE | AFMT_IMA_ADPCM,
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW | AFMT_S16_BE | AFMT_IMA_ADPCM,
+	AFMT_U8 | AFMT_S16_LE /* CS4235 */,
+	AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW	/* Ensoniq Soundscape*/
+};
+
+static ad1848_info adev_info[MAX_AUDIO_DEV];
+
+#define io_Index_Addr(d)	((d)->base)
+#define io_Indexed_Data(d)	((d)->base+1)
+#define io_Status(d)		((d)->base+2)
+#define io_Polled_IO(d)		((d)->base+3)
+
+static struct {
+     unsigned char flags;
+#define CAP_F_TIMER 0x01     
+} capabilities [10 /*devc->model */ ] = {
+     {0}
+    ,{0}           /* MD_1848  */
+    ,{CAP_F_TIMER} /* MD_4231  */
+    ,{CAP_F_TIMER} /* MD_4231A */
+    ,{CAP_F_TIMER} /* MD_1845  */
+    ,{CAP_F_TIMER} /* MD_4232  */
+    ,{0}           /* MD_C930  */
+    ,{CAP_F_TIMER} /* MD_IWAVE */
+    ,{0}           /* MD_4235  */
+    ,{CAP_F_TIMER} /* MD_1845_SSCAPE */
+};
+
+static int      ad1848_open(int dev, int mode);
+static void     ad1848_close(int dev);
+static void     ad1848_output_block(int dev, unsigned long buf, int count, int intrflag);
+static void     ad1848_start_input(int dev, unsigned long buf, int count, int intrflag);
+static int      ad1848_prepare_for_output(int dev, int bsize, int bcount);
+static int      ad1848_prepare_for_input(int dev, int bsize, int bcount);
+static void     ad1848_halt(int dev);
+static void     ad1848_halt_input(int dev);
+static void     ad1848_halt_output(int dev);
+static void     ad1848_trigger(int dev, int bits);
+
+#if defined(CONFIG_SEQUENCER) && !defined(EXCLUDE_TIMERS)
+static int ad1848_tmr_install(int dev);
+static void ad1848_tmr_reprogram(int dev);
+
+#endif
+
+static int ad_read(ad1848_info * devc, int reg)
+{
+	unsigned long flags;
+	int x;
+	int timeout = 900000;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/*Are we initializing */
+		timeout--;
+
+	save_flags(flags);
+	cli();
+	outb(((unsigned char) (reg & 0xff) | devc->MCE_bit), io_Index_Addr(devc));
+	x = inb(io_Indexed_Data(devc));
+/* printk("(%02x<-%02x) ", reg|devc->MCE_bit, x); */
+	restore_flags(flags);
+
+	return x;
+}
+
+static void ad_write(ad1848_info * devc, int reg, int data)
+{
+	unsigned long flags;
+	int timeout = 900000;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/* Are we initializing */
+		timeout--;
+
+	save_flags(flags);
+	cli();
+	outb(((unsigned char) (reg & 0xff) | devc->MCE_bit), io_Index_Addr(devc));
+	outb(((unsigned char) (data & 0xff)), io_Indexed_Data(devc));
+	/* printk("(%02x->%02x) ", reg|devc->MCE_bit, data); */
+	restore_flags(flags);
+}
+
+static void wait_for_calibration(ad1848_info * devc)
+{
+	int timeout = 0;
+
+	/*
+	 * Wait until the auto calibration process has finished.
+	 *
+	 * 1)       Wait until the chip becomes ready (reads don't return 0x80).
+	 * 2)       Wait until the ACI bit of I11 gets on and then off.
+	 */
+
+	timeout = 100000;
+	while (timeout > 0 && inb(devc->base) == 0x80)
+		timeout--;
+	if (inb(devc->base) & 0x80)
+		printk(KERN_WARNING "ad1848: Auto calibration timed out(1).\n");
+
+	timeout = 100;
+	while (timeout > 0 && !(ad_read(devc, 11) & 0x20))
+		timeout--;
+	if (!(ad_read(devc, 11) & 0x20))
+		return;
+
+	timeout = 80000;
+	while (timeout > 0 && (ad_read(devc, 11) & 0x20))
+		timeout--;
+	if (ad_read(devc, 11) & 0x20)
+		if ( (devc->model != MD_1845) || (devc->model != MD_1845_SSCAPE))
+			printk(KERN_WARNING "ad1848: Auto calibration timed out(3).\n");
+}
+
+static void ad_mute(ad1848_info * devc)
+{
+	int i;
+	unsigned char prev;
+
+	/*
+	 * Save old register settings and mute output channels
+	 */
+	 
+	for (i = 6; i < 8; i++)
+	{
+		prev = devc->saved_regs[i] = ad_read(devc, i);
+	}
+
+}
+
+static void ad_unmute(ad1848_info * devc)
+{
+}
+
+static void ad_enter_MCE(ad1848_info * devc)
+{
+	unsigned long flags;
+	int timeout = 1000;
+	unsigned short prev;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/*Are we initializing */
+		timeout--;
+
+	save_flags(flags);
+	cli();
+
+	devc->MCE_bit = 0x40;
+	prev = inb(io_Index_Addr(devc));
+	if (prev & 0x40)
+	{
+		restore_flags(flags);
+		return;
+	}
+	outb((devc->MCE_bit), io_Index_Addr(devc));
+	restore_flags(flags);
+}
+
+static void ad_leave_MCE(ad1848_info * devc)
+{
+	unsigned long flags;
+	unsigned char prev, acal;
+	int timeout = 1000;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/*Are we initializing */
+		timeout--;
+
+	save_flags(flags);
+	cli();
+
+	acal = ad_read(devc, 9);
+
+	devc->MCE_bit = 0x00;
+	prev = inb(io_Index_Addr(devc));
+	outb((0x00), io_Index_Addr(devc));	/* Clear the MCE bit */
+
+	if ((prev & 0x40) == 0)	/* Not in MCE mode */
+	{
+		restore_flags(flags);
+		return;
+	}
+	outb((0x00), io_Index_Addr(devc));	/* Clear the MCE bit */
+	if (acal & 0x08)	/* Auto calibration is enabled */
+		wait_for_calibration(devc);
+	restore_flags(flags);
+}
+
+static int ad1848_set_recmask(ad1848_info * devc, int mask)
+{
+	unsigned char   recdev;
+	int             i, n;
+
+	mask &= devc->supported_rec_devices;
+
+	/* Rename the mixer bits if necessary */
+	for (i = 0; i < 32; i++)
+	{
+		if (devc->mixer_reroute[i] != i)
+		{
+			if (mask & (1 << i))
+			{
+				mask &= ~(1 << i);
+				mask |= (1 << devc->mixer_reroute[i]);
+			}
+		}
+	}
+	
+	n = 0;
+	for (i = 0; i < 32; i++)	/* Count selected device bits */
+		if (mask & (1 << i))
+			n++;
+
+	if (!soundpro) {
+		if (n == 0)
+			mask = SOUND_MASK_MIC;
+		else if (n != 1) {	/* Too many devices selected */
+			mask &= ~devc->recmask;	/* Filter out active settings */
+
+			n = 0;
+			for (i = 0; i < 32; i++)	/* Count selected device bits */
+				if (mask & (1 << i))
+					n++;
+
+			if (n != 1)
+				mask = SOUND_MASK_MIC;
+		}
+		switch (mask) {
+		case SOUND_MASK_MIC:
+			recdev = 2;
+			break;
+
+		case SOUND_MASK_LINE:
+		case SOUND_MASK_LINE3:
+			recdev = 0;
+			break;
+
+		case SOUND_MASK_CD:
+		case SOUND_MASK_LINE1:
+			recdev = 1;
+			break;
+
+		case SOUND_MASK_IMIX:
+			recdev = 3;
+			break;
+
+		default:
+			mask = SOUND_MASK_MIC;
+			recdev = 2;
+		}
+
+		recdev <<= 6;
+		ad_write(devc, 0, (ad_read(devc, 0) & 0x3f) | recdev);
+		ad_write(devc, 1, (ad_read(devc, 1) & 0x3f) | recdev);
+	} else { /* soundpro */
+		unsigned char val;
+		int set_rec_bit;
+		int j;
+
+		for (i = 0; i < 32; i++) {	/* For each bit */
+			if ((devc->supported_rec_devices & (1 << i)) == 0)
+				continue;	/* Device not supported */
+
+			for (j = LEFT_CHN; j <= RIGHT_CHN; j++) {
+				if (devc->mix_devices[i][j].nbits == 0) /* Inexistent channel */
+					continue;
+
+				/*
+				 * This is tricky:
+				 * set_rec_bit becomes 1 if the corresponding bit in mask is set
+				 * then it gets flipped if the polarity is inverse
+				 */
+				set_rec_bit = ((mask & (1 << i)) != 0) ^ devc->mix_devices[i][j].recpol;
+
+				val = ad_read(devc, devc->mix_devices[i][j].recreg);
+				val &= ~(1 << devc->mix_devices[i][j].recpos);
+				val |= (set_rec_bit << devc->mix_devices[i][j].recpos);
+				ad_write(devc, devc->mix_devices[i][j].recreg, val);
+			}
+		}
+	}
+
+	/* Rename the mixer bits back if necessary */
+	for (i = 0; i < 32; i++)
+	{
+		if (devc->mixer_reroute[i] != i)
+		{
+			if (mask & (1 << devc->mixer_reroute[i]))
+			{
+				mask &= ~(1 << devc->mixer_reroute[i]);
+				mask |= (1 << i);
+			}
+		}
+	}
+	devc->recmask = mask;
+	return mask;
+}
+
+static void change_bits(ad1848_info * devc, unsigned char *regval,
+			unsigned char *muteval, int dev, int chn, int newval)
+{
+	unsigned char mask;
+	int shift;
+	int mute;
+	int mutemask;
+	int set_mute_bit;
+
+	set_mute_bit = (newval == 0) ^ devc->mix_devices[dev][chn].mutepol;
+
+	if (devc->mix_devices[dev][chn].polarity == 1)	/* Reverse */
+		newval = 100 - newval;
+
+	mask = (1 << devc->mix_devices[dev][chn].nbits) - 1;
+	shift = devc->mix_devices[dev][chn].bitpos;
+
+	if (devc->mix_devices[dev][chn].mutepos == 8)
+	{			/* if there is no mute bit */
+		mute = 0;	/* No mute bit; do nothing special */
+		mutemask = ~0;	/* No mute bit; do nothing special */
+	}
+	else
+	{
+		mute = (set_mute_bit << devc->mix_devices[dev][chn].mutepos);
+		mutemask = ~(1 << devc->mix_devices[dev][chn].mutepos);
+	}
+
+	newval = (int) ((newval * mask) + 50) / 100;	/* Scale it */
+	*regval &= ~(mask << shift);			/* Clear bits */
+	*regval |= (newval & mask) << shift;		/* Set new value */
+
+	*muteval &= mutemask;
+	*muteval |= mute;
+}
+
+static int ad1848_mixer_get(ad1848_info * devc, int dev)
+{
+	if (!((1 << dev) & devc->supported_devices))
+		return -EINVAL;
+
+	dev = devc->mixer_reroute[dev];
+
+	return devc->levels[dev];
+}
+
+static void ad1848_mixer_set_channel(ad1848_info *devc, int dev, int value, int channel)
+{
+	int regoffs, muteregoffs;
+	unsigned char val, muteval;
+
+	regoffs = devc->mix_devices[dev][channel].regno;
+	muteregoffs = devc->mix_devices[dev][channel].mutereg;
+	val = ad_read(devc, regoffs);
+
+	if (muteregoffs != regoffs) {
+		muteval = ad_read(devc, muteregoffs);
+		change_bits(devc, &val, &muteval, dev, channel, value);
+	}
+	else
+		change_bits(devc, &val, &val, dev, channel, value);
+
+	ad_write(devc, regoffs, val);
+	devc->saved_regs[regoffs] = val;
+	if (muteregoffs != regoffs) {
+		ad_write(devc, muteregoffs, muteval);
+		devc->saved_regs[muteregoffs] = muteval;
+	}
+}
+
+static int ad1848_mixer_set(ad1848_info * devc, int dev, int value)
+{
+	int left = value & 0x000000ff;
+	int right = (value & 0x0000ff00) >> 8;
+	int retvol;
+
+	if (dev > 31)
+		return -EINVAL;
+
+	if (!(devc->supported_devices & (1 << dev)))
+		return -EINVAL;
+
+	dev = devc->mixer_reroute[dev];
+
+	if (devc->mix_devices[dev][LEFT_CHN].nbits == 0)
+		return -EINVAL;
+
+	if (left > 100)
+		left = 100;
+	if (right > 100)
+		right = 100;
+
+	if (devc->mix_devices[dev][RIGHT_CHN].nbits == 0)	/* Mono control */
+		right = left;
+
+	retvol = left | (right << 8);
+
+	/* Scale volumes */
+	left = mix_cvt[left];
+	right = mix_cvt[right];
+
+	devc->levels[dev] = retvol;
+
+	/*
+	 * Set the left channel
+	 */
+	ad1848_mixer_set_channel(devc, dev, left, LEFT_CHN);
+
+	/*
+	 * Set the right channel
+	 */
+	if (devc->mix_devices[dev][RIGHT_CHN].nbits == 0)
+		goto out;
+	ad1848_mixer_set_channel(devc, dev, right, RIGHT_CHN);
+
+ out:
+	return retvol;
+}
+
+static void ad1848_mixer_reset(ad1848_info * devc)
+{
+	int i;
+	char name[32];
+
+	devc->mix_devices = &(ad1848_mix_devices[0]);
+
+	sprintf(name, "%s_%d", devc->chip_name, nr_ad1848_devs);
+
+	for (i = 0; i < 32; i++)
+		devc->mixer_reroute[i] = i;
+
+	devc->supported_rec_devices = MODE1_REC_DEVICES;
+
+	switch (devc->model)
+	{
+		case MD_4231:
+		case MD_4231A:
+		case MD_1845:
+		case MD_1845_SSCAPE:
+			devc->supported_devices = MODE2_MIXER_DEVICES;
+			break;
+
+		case MD_C930:
+			devc->supported_devices = C930_MIXER_DEVICES;
+			devc->mix_devices = &(c930_mix_devices[0]);
+			break;
+
+		case MD_IWAVE:
+			devc->supported_devices = MODE3_MIXER_DEVICES;
+			devc->mix_devices = &(iwave_mix_devices[0]);
+			break;
+
+		case MD_4232:
+			devc->supported_devices = MODE3_MIXER_DEVICES;
+			break;
+
+		case MD_1848:
+			if (soundpro) {
+				devc->supported_devices = SPRO_MIXER_DEVICES;
+				devc->supported_rec_devices = SPRO_REC_DEVICES;
+				devc->mix_devices = &(spro_mix_devices[0]);
+				break;
+			}
+
+		default:
+			devc->supported_devices = MODE1_MIXER_DEVICES;
+	}
+
+	devc->orig_devices = devc->supported_devices;
+	devc->orig_rec_devices = devc->supported_rec_devices;
+
+	devc->levels = load_mixer_volumes(name, default_mixer_levels, 1);
+
+	for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
+	{
+		if (devc->supported_devices & (1 << i))
+			ad1848_mixer_set(devc, i, devc->levels[i]);
+	}
+	
+	ad1848_set_recmask(devc, SOUND_MASK_MIC);
+	
+	devc->mixer_output_port = devc->levels[31] | AUDIO_HEADPHONE | AUDIO_LINE_OUT;
+
+	if (!soundpro) {
+		if (devc->mixer_output_port & AUDIO_SPEAKER)
+			ad_write(devc, 26, ad_read(devc, 26) & ~0x40);	/* Unmute mono out */
+		else
+			ad_write(devc, 26, ad_read(devc, 26) | 0x40);	/* Mute mono out */
+	} else {
+		/*
+		 * From the "wouldn't it be nice if the mixer API had (better)
+		 * support for custom stuff" category
+		 */
+		/* Enable surround mode and SB16 mixer */
+		ad_write(devc, 16, 0x60);
+	}
+}
+
+static int ad1848_mixer_ioctl(int dev, unsigned int cmd, caddr_t arg)
+{
+	ad1848_info *devc = mixer_devs[dev]->devc;
+	int val;
+
+	if (cmd == SOUND_MIXER_PRIVATE1) 
+	{
+		if (get_user(val, (int *)arg))
+			return -EFAULT;
+
+		if (val != 0xffff) 
+		{
+			val &= (AUDIO_SPEAKER | AUDIO_HEADPHONE | AUDIO_LINE_OUT);
+			devc->mixer_output_port = val;
+			val |= AUDIO_HEADPHONE | AUDIO_LINE_OUT;	/* Always on */
+			devc->mixer_output_port = val;
+			if (val & AUDIO_SPEAKER)
+				ad_write(devc, 26, ad_read(devc, 26) & ~0x40);	/* Unmute mono out */
+			else
+				ad_write(devc, 26, ad_read(devc, 26) | 0x40);		/* Mute mono out */
+		}
+		val = devc->mixer_output_port;
+		return put_user(val, (int *)arg);
+	}
+	if (cmd == SOUND_MIXER_PRIVATE2)
+	{
+		if (get_user(val, (int *)arg))
+			return -EFAULT;
+		return(ad1848_control(AD1848_MIXER_REROUTE, val));
+	}
+	if (((cmd >> 8) & 0xff) == 'M') 
+	{
+		if (_SIOC_DIR(cmd) & _SIOC_WRITE)
+		{
+			switch (cmd & 0xff) 
+			{
+				case SOUND_MIXER_RECSRC:
+					if (get_user(val, (int *)arg))
+						return -EFAULT;
+					val = ad1848_set_recmask(devc, val);
+					break;
+				
+				default:
+					if (get_user(val, (int *)arg))
+					return -EFAULT;
+					val = ad1848_mixer_set(devc, cmd & 0xff, val);
+					break;
+			} 
+			return put_user(val, (int *)arg);
+		}
+		else
+		{
+			switch (cmd & 0xff) 
+			{
+				/*
+				 * Return parameters
+				 */
+			    
+				case SOUND_MIXER_RECSRC:
+					val = devc->recmask;
+					break;
+				
+				case SOUND_MIXER_DEVMASK:
+					val = devc->supported_devices;
+					break;
+				
+				case SOUND_MIXER_STEREODEVS:
+					val = devc->supported_devices;
+					if (devc->model != MD_C930)
+						val &= ~(SOUND_MASK_SPEAKER | SOUND_MASK_IMIX);
+					break;
+				
+				case SOUND_MIXER_RECMASK:
+					val = devc->supported_rec_devices;
+					break;
+
+				case SOUND_MIXER_CAPS:
+					val=SOUND_CAP_EXCL_INPUT;
+					break;
+
+				default:
+					val = ad1848_mixer_get(devc, cmd & 0xff);
+					break;
+			}
+			return put_user(val, (int *)arg);
+		}
+	}
+	else
+		return -EINVAL;
+}
+
+static int ad1848_set_speed(int dev, int arg)
+{
+	ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	/*
+	 * The sampling speed is encoded in the least significant nibble of I8. The
+	 * LSB selects the clock source (0=24.576 MHz, 1=16.9344 MHz) and other
+	 * three bits select the divisor (indirectly):
+	 *
+	 * The available speeds are in the following table. Keep the speeds in
+	 * the increasing order.
+	 */
+	typedef struct
+	{
+		int             speed;
+		unsigned char   bits;
+	}
+	speed_struct;
+
+	static speed_struct speed_table[] =
+	{
+		{5510, (0 << 1) | 1},
+		{5510, (0 << 1) | 1},
+		{6620, (7 << 1) | 1},
+		{8000, (0 << 1) | 0},
+		{9600, (7 << 1) | 0},
+		{11025, (1 << 1) | 1},
+		{16000, (1 << 1) | 0},
+		{18900, (2 << 1) | 1},
+		{22050, (3 << 1) | 1},
+		{27420, (2 << 1) | 0},
+		{32000, (3 << 1) | 0},
+		{33075, (6 << 1) | 1},
+		{37800, (4 << 1) | 1},
+		{44100, (5 << 1) | 1},
+		{48000, (6 << 1) | 0}
+	};
+
+	int i, n, selected = -1;
+
+	n = sizeof(speed_table) / sizeof(speed_struct);
+
+	if (arg <= 0)
+		return portc->speed;
+
+	if (devc->model == MD_1845 || devc->model == MD_1845_SSCAPE)	/* AD1845 has different timer than others */
+	{
+		if (arg < 4000)
+			arg = 4000;
+		if (arg > 50000)
+			arg = 50000;
+
+		portc->speed = arg;
+		portc->speed_bits = speed_table[3].bits;
+		return portc->speed;
+	}
+	if (arg < speed_table[0].speed)
+		selected = 0;
+	if (arg > speed_table[n - 1].speed)
+		selected = n - 1;
+
+	for (i = 1 /*really */ ; selected == -1 && i < n; i++)
+	{
+		if (speed_table[i].speed == arg)
+			selected = i;
+		else if (speed_table[i].speed > arg)
+		{
+			int diff1, diff2;
+
+			diff1 = arg - speed_table[i - 1].speed;
+			diff2 = speed_table[i].speed - arg;
+
+			if (diff1 < diff2)
+				selected = i - 1;
+			else
+				selected = i;
+		}
+	}
+	if (selected == -1)
+	{
+		printk(KERN_WARNING "ad1848: Can't find speed???\n");
+		selected = 3;
+	}
+	portc->speed = speed_table[selected].speed;
+	portc->speed_bits = speed_table[selected].bits;
+	return portc->speed;
+}
+
+static short ad1848_set_channels(int dev, short arg)
+{
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	if (arg != 1 && arg != 2)
+		return portc->channels;
+
+	portc->channels = arg;
+	return arg;
+}
+
+static unsigned int ad1848_set_bits(int dev, unsigned int arg)
+{
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	static struct format_tbl
+	{
+		  int             format;
+		  unsigned char   bits;
+	}
+	format2bits[] =
+	{
+		{
+			0, 0
+		}
+		,
+		{
+			AFMT_MU_LAW, 1
+		}
+		,
+		{
+			AFMT_A_LAW, 3
+		}
+		,
+		{
+			AFMT_IMA_ADPCM, 5
+		}
+		,
+		{
+			AFMT_U8, 0
+		}
+		,
+		{
+			AFMT_S16_LE, 2
+		}
+		,
+		{
+			AFMT_S16_BE, 6
+		}
+		,
+		{
+			AFMT_S8, 0
+		}
+		,
+		{
+			AFMT_U16_LE, 0
+		}
+		,
+		{
+			AFMT_U16_BE, 0
+		}
+	};
+	int i, n = sizeof(format2bits) / sizeof(struct format_tbl);
+
+	if (arg == 0)
+		return portc->audio_format;
+
+	if (!(arg & ad_format_mask[devc->model]))
+		arg = AFMT_U8;
+
+	portc->audio_format = arg;
+
+	for (i = 0; i < n; i++)
+		if (format2bits[i].format == arg)
+		{
+			if ((portc->format_bits = format2bits[i].bits) == 0)
+				return portc->audio_format = AFMT_U8;		/* Was not supported */
+
+			return arg;
+		}
+	/* Still hanging here. Something must be terribly wrong */
+	portc->format_bits = 0;
+	return portc->audio_format = AFMT_U8;
+}
+
+static struct audio_driver ad1848_audio_driver =
+{
+	ad1848_open,
+	ad1848_close,
+	ad1848_output_block,
+	ad1848_start_input,
+	NULL,
+	ad1848_prepare_for_input,
+	ad1848_prepare_for_output,
+	ad1848_halt,
+	NULL,
+	NULL,
+	ad1848_halt_input,
+	ad1848_halt_output,
+	ad1848_trigger,
+	ad1848_set_speed,
+	ad1848_set_bits,
+	ad1848_set_channels
+};
+
+static struct mixer_operations ad1848_mixer_operations =
+{
+	"SOUNDPORT",
+	"AD1848/CS4248/CS4231",
+	ad1848_mixer_ioctl
+};
+
+static int ad1848_open(int dev, int mode)
+{
+	ad1848_info    *devc = NULL;
+	ad1848_port_info *portc;
+	unsigned long   flags;
+
+	if (dev < 0 || dev >= num_audiodevs)
+		return -ENXIO;
+
+	devc = (ad1848_info *) audio_devs[dev]->devc;
+	portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	save_flags(flags);
+	cli();
+	if (portc->open_mode || (devc->open_mode & mode))
+	{
+		restore_flags(flags);
+		return -EBUSY;
+	}
+	devc->dual_dma = 0;
+
+	if (audio_devs[dev]->flags & DMA_DUPLEX)
+	{
+		devc->dual_dma = 1;
+	}
+	devc->intr_active = 0;
+	devc->audio_mode = 0;
+	devc->open_mode |= mode;
+	portc->open_mode = mode;
+	ad1848_trigger(dev, 0);
+
+	if (mode & OPEN_READ)
+		devc->record_dev = dev;
+	if (mode & OPEN_WRITE)
+		devc->playback_dev = dev;
+	restore_flags(flags);
+/*
+ * Mute output until the playback really starts. This decreases clicking (hope so).
+ */
+	ad_mute(devc);
+
+	return 0;
+}
+
+static void ad1848_close(int dev)
+{
+	unsigned long   flags;
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	DEB(printk("ad1848_close(void)\n"));
+
+	save_flags(flags);
+	cli();
+
+	devc->intr_active = 0;
+	ad1848_halt(dev);
+
+	devc->audio_mode = 0;
+	devc->open_mode &= ~portc->open_mode;
+	portc->open_mode = 0;
+
+	ad_unmute(devc);
+	restore_flags(flags);
+}
+
+static void ad1848_output_block(int dev, unsigned long buf, int count, int intrflag)
+{
+	unsigned long   flags, cnt;
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	cnt = count;
+
+	if (portc->audio_format == AFMT_IMA_ADPCM)
+	{
+		cnt /= 4;
+	}
+	else
+	{
+		if (portc->audio_format & (AFMT_S16_LE | AFMT_S16_BE))	/* 16 bit data */
+			cnt >>= 1;
+	}
+	if (portc->channels > 1)
+		cnt >>= 1;
+	cnt--;
+
+	if ((devc->audio_mode & PCM_ENABLE_OUTPUT) && (audio_devs[dev]->flags & DMA_AUTOMODE) &&
+	    intrflag &&
+	    cnt == devc->xfer_count)
+	{
+		devc->audio_mode |= PCM_ENABLE_OUTPUT;
+		devc->intr_active = 1;
+		return;	/*
+			 * Auto DMA mode on. No need to react
+			 */
+	}
+	save_flags(flags);
+	cli();
+
+	ad_write(devc, 15, (unsigned char) (cnt & 0xff));
+	ad_write(devc, 14, (unsigned char) ((cnt >> 8) & 0xff));
+
+	devc->xfer_count = cnt;
+	devc->audio_mode |= PCM_ENABLE_OUTPUT;
+	devc->intr_active = 1;
+	restore_flags(flags);
+}
+
+static void ad1848_start_input(int dev, unsigned long buf, int count, int intrflag)
+{
+	unsigned long   flags, cnt;
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	cnt = count;
+	if (portc->audio_format == AFMT_IMA_ADPCM)
+	{
+		cnt /= 4;
+	}
+	else
+	{
+		if (portc->audio_format & (AFMT_S16_LE | AFMT_S16_BE))	/* 16 bit data */
+			cnt >>= 1;
+	}
+	if (portc->channels > 1)
+		cnt >>= 1;
+	cnt--;
+
+	if ((devc->audio_mode & PCM_ENABLE_INPUT) && (audio_devs[dev]->flags & DMA_AUTOMODE) &&
+		intrflag &&
+		cnt == devc->xfer_count)
+	{
+		devc->audio_mode |= PCM_ENABLE_INPUT;
+		devc->intr_active = 1;
+		return;	/*
+			 * Auto DMA mode on. No need to react
+			 */
+	}
+	save_flags(flags);
+	cli();
+
+	if (devc->model == MD_1848)
+	{
+		  ad_write(devc, 15, (unsigned char) (cnt & 0xff));
+		  ad_write(devc, 14, (unsigned char) ((cnt >> 8) & 0xff));
+	}
+	else
+	{
+		  ad_write(devc, 31, (unsigned char) (cnt & 0xff));
+		  ad_write(devc, 30, (unsigned char) ((cnt >> 8) & 0xff));
+	}
+
+	ad_unmute(devc);
+
+	devc->xfer_count = cnt;
+	devc->audio_mode |= PCM_ENABLE_INPUT;
+	devc->intr_active = 1;
+	restore_flags(flags);
+}
+
+static int ad1848_prepare_for_output(int dev, int bsize, int bcount)
+{
+	int             timeout;
+	unsigned char   fs, old_fs, tmp = 0;
+	unsigned long   flags;
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	ad_mute(devc);
+
+	save_flags(flags);
+	cli();
+	fs = portc->speed_bits | (portc->format_bits << 5);
+
+	if (portc->channels > 1)
+		fs |= 0x10;
+
+	ad_enter_MCE(devc);	/* Enables changes to the format select reg */
+
+	if (devc->model == MD_1845 || devc->model == MD_1845_SSCAPE) /* Use alternate speed select registers */
+	{
+		fs &= 0xf0;	/* Mask off the rate select bits */
+
+		ad_write(devc, 22, (portc->speed >> 8) & 0xff);	/* Speed MSB */
+		ad_write(devc, 23, portc->speed & 0xff);	/* Speed LSB */
+	}
+	old_fs = ad_read(devc, 8);
+
+	if (devc->model == MD_4232)
+	{
+		tmp = ad_read(devc, 16);
+		ad_write(devc, 16, tmp | 0x30);
+	}
+	if (devc->model == MD_IWAVE)
+		ad_write(devc, 17, 0xc2);	/* Disable variable frequency select */
+
+	ad_write(devc, 8, fs);
+
+	/*
+	 * Write to I8 starts resynchronization. Wait until it completes.
+	 */
+
+	timeout = 0;
+	while (timeout < 100 && inb(devc->base) != 0x80)
+		timeout++;
+	timeout = 0;
+	while (timeout < 10000 && inb(devc->base) == 0x80)
+		timeout++;
+
+	if (devc->model == MD_4232)
+		ad_write(devc, 16, tmp & ~0x30);
+
+	ad_leave_MCE(devc);	/*
+				 * Starts the calibration process.
+				 */
+	restore_flags(flags);
+	devc->xfer_count = 0;
+
+#if defined(CONFIG_SEQUENCER) && !defined(EXCLUDE_TIMERS)
+	if (dev == timer_installed && devc->timer_running)
+		if ((fs & 0x01) != (old_fs & 0x01))
+		{
+			ad1848_tmr_reprogram(dev);
+		}
+#endif
+	ad1848_halt_output(dev);
+	return 0;
+}
+
+static int ad1848_prepare_for_input(int dev, int bsize, int bcount)
+{
+	int timeout;
+	unsigned char fs, old_fs, tmp = 0;
+	unsigned long flags;
+	ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	if (devc->audio_mode)
+		return 0;
+
+	save_flags(flags);
+	cli();
+	fs = portc->speed_bits | (portc->format_bits << 5);
+
+	if (portc->channels > 1)
+		fs |= 0x10;
+
+	ad_enter_MCE(devc);	/* Enables changes to the format select reg */
+
+	if ((devc->model == MD_1845) || (devc->model == MD_1845_SSCAPE))	/* Use alternate speed select registers */
+	{
+		fs &= 0xf0;	/* Mask off the rate select bits */
+
+		ad_write(devc, 22, (portc->speed >> 8) & 0xff);	/* Speed MSB */
+		ad_write(devc, 23, portc->speed & 0xff);	/* Speed LSB */
+	}
+	if (devc->model == MD_4232)
+	{
+		tmp = ad_read(devc, 16);
+		ad_write(devc, 16, tmp | 0x30);
+	}
+	if (devc->model == MD_IWAVE)
+		ad_write(devc, 17, 0xc2);	/* Disable variable frequency select */
+
+	/*
+	 * If mode >= 2 (CS4231), set I28. It's the capture format register.
+	 */
+	
+	if (devc->model != MD_1848)
+	{
+		old_fs = ad_read(devc, 28);
+		ad_write(devc, 28, fs);
+
+		/*
+		 * Write to I28 starts resynchronization. Wait until it completes.
+		 */
+		
+		timeout = 0;
+		while (timeout < 100 && inb(devc->base) != 0x80)
+			timeout++;
+
+		timeout = 0;
+		while (timeout < 10000 && inb(devc->base) == 0x80)
+			timeout++;
+
+		if (devc->model != MD_1848 && devc->model != MD_1845 && devc->model != MD_1845_SSCAPE)
+		{
+			/*
+			 * CS4231 compatible devices don't have separate sampling rate selection
+			 * register for recording an playback. The I8 register is shared so we have to
+			 * set the speed encoding bits of it too.
+			 */
+			unsigned char   tmp = portc->speed_bits | (ad_read(devc, 8) & 0xf0);
+
+			ad_write(devc, 8, tmp);
+			/*
+			 * Write to I8 starts resynchronization. Wait until it completes.
+			 */
+			timeout = 0;
+			while (timeout < 100 && inb(devc->base) != 0x80)
+				timeout++;
+
+			timeout = 0;
+			while (timeout < 10000 && inb(devc->base) == 0x80)
+				timeout++;
+		}
+	}
+	else
+	{			/* For AD1848 set I8. */
+
+		old_fs = ad_read(devc, 8);
+		ad_write(devc, 8, fs);
+		/*
+		 * Write to I8 starts resynchronization. Wait until it completes.
+		 */
+		timeout = 0;
+		while (timeout < 100 && inb(devc->base) != 0x80)
+			timeout++;
+		timeout = 0;
+		while (timeout < 10000 && inb(devc->base) == 0x80)
+			timeout++;
+	}
+
+	if (devc->model == MD_4232)
+		ad_write(devc, 16, tmp & ~0x30);
+
+	ad_leave_MCE(devc);	/*
+				 * Starts the calibration process.
+				 */
+	restore_flags(flags);
+	devc->xfer_count = 0;
+
+#if defined(CONFIG_SEQUENCER) && !defined(EXCLUDE_TIMERS)
+	if (dev == timer_installed && devc->timer_running)
+	{
+		if ((fs & 0x01) != (old_fs & 0x01))
+		{
+			ad1848_tmr_reprogram(dev);
+		}
+	}
+#endif
+	ad1848_halt_input(dev);
+	return 0;
+}
+
+static void ad1848_halt(int dev)
+{
+	ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+
+	unsigned char   bits = ad_read(devc, 9);
+
+	if (bits & 0x01 && (portc->open_mode & OPEN_WRITE))
+		ad1848_halt_output(dev);
+
+	if (bits & 0x02 && (portc->open_mode & OPEN_READ))
+		ad1848_halt_input(dev);
+	devc->audio_mode = 0;
+}
+
+static void ad1848_halt_input(int dev)
+{
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	unsigned long   flags;
+
+	if (!(ad_read(devc, 9) & 0x02))
+		return;		/* Capture not enabled */
+
+	save_flags(flags);
+	cli();
+
+	ad_mute(devc);
+
+	{
+		int             tmout;
+		
+		if(!isa_dma_bridge_buggy)
+		        disable_dma(audio_devs[dev]->dmap_in->dma);
+
+		for (tmout = 0; tmout < 100000; tmout++)
+			if (ad_read(devc, 11) & 0x10)
+				break;
+		ad_write(devc, 9, ad_read(devc, 9) & ~0x02);	/* Stop capture */
+
+		if(!isa_dma_bridge_buggy)
+		        enable_dma(audio_devs[dev]->dmap_in->dma);
+		devc->audio_mode &= ~PCM_ENABLE_INPUT;
+	}
+
+	outb(0, io_Status(devc));	/* Clear interrupt status */
+	outb(0, io_Status(devc));	/* Clear interrupt status */
+
+	devc->audio_mode &= ~PCM_ENABLE_INPUT;
+
+	restore_flags(flags);
+}
+
+static void ad1848_halt_output(int dev)
+{
+	ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
+	unsigned long flags;
+
+	if (!(ad_read(devc, 9) & 0x01))
+		return;		/* Playback not enabled */
+
+	save_flags(flags);
+	cli();
+
+	ad_mute(devc);
+	{
+		int             tmout;
+
+		if(!isa_dma_bridge_buggy)
+		        disable_dma(audio_devs[dev]->dmap_out->dma);
+
+		for (tmout = 0; tmout < 100000; tmout++)
+			if (ad_read(devc, 11) & 0x10)
+				break;
+		ad_write(devc, 9, ad_read(devc, 9) & ~0x01);	/* Stop playback */
+
+		if(!isa_dma_bridge_buggy)
+		       enable_dma(audio_devs[dev]->dmap_out->dma);
+
+		devc->audio_mode &= ~PCM_ENABLE_OUTPUT;
+	}
+
+	outb((0), io_Status(devc));	/* Clear interrupt status */
+	outb((0), io_Status(devc));	/* Clear interrupt status */
+
+	devc->audio_mode &= ~PCM_ENABLE_OUTPUT;
+
+	restore_flags(flags);
+}
+
+static void ad1848_trigger(int dev, int state)
+{
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	ad1848_port_info *portc = (ad1848_port_info *) audio_devs[dev]->portc;
+	unsigned long   flags;
+	unsigned char   tmp, old;
+
+	save_flags(flags);
+	cli();
+	state &= devc->audio_mode;
+
+	tmp = old = ad_read(devc, 9);
+
+	if (portc->open_mode & OPEN_READ)
+	{
+		  if (state & PCM_ENABLE_INPUT)
+			  tmp |= 0x02;
+		  else
+			  tmp &= ~0x02;
+	}
+	if (portc->open_mode & OPEN_WRITE)
+	{
+		if (state & PCM_ENABLE_OUTPUT)
+			tmp |= 0x01;
+		else
+			tmp &= ~0x01;
+	}
+	/* ad_mute(devc); */
+	if (tmp != old)
+	{
+		  ad_write(devc, 9, tmp);
+		  ad_unmute(devc);
+	}
+	restore_flags(flags);
+}
+
+static void ad1848_init_hw(ad1848_info * devc)
+{
+	int i;
+
+	/*
+	 * Initial values for the indirect registers of CS4248/AD1848.
+	 */
+	static int      init_values[] =
+	{
+		0xa8, 0xa8, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00,
+		0x00, 0x0c, 0x02, 0x00, 0x8a, 0x01, 0x00, 0x00,
+
+	/* Positions 16 to 31 just for CS4231/2 and ad1845 */
+		0x80, 0x00, 0x10, 0x10, 0x00, 0x00, 0x1f, 0x40,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+	};
+
+
+	for (i = 0; i < 16; i++)
+		ad_write(devc, i, init_values[i]);
+
+
+	ad_mute(devc);		/* Initialize some variables */
+	ad_unmute(devc);	/* Leave it unmuted now */
+
+	if (devc->model > MD_1848)
+	{
+		if (devc->model == MD_1845_SSCAPE)
+			ad_write(devc, 12, ad_read(devc, 12) | 0x50);
+		else 
+			ad_write(devc, 12, ad_read(devc, 12) | 0x40);		/* Mode2 = enabled */
+
+		if (devc->model == MD_IWAVE)
+			ad_write(devc, 12, 0x6c);	/* Select codec mode 3 */
+
+		if (devc-> model != MD_1845_SSCAPE)
+			for (i = 16; i < 32; i++)
+				ad_write(devc, i, init_values[i]);
+
+		if (devc->model == MD_IWAVE)
+			ad_write(devc, 16, 0x30);	/* Playback and capture counters enabled */
+	}
+	if (devc->model > MD_1848)
+	{
+		if (devc->audio_flags & DMA_DUPLEX)
+			ad_write(devc, 9, ad_read(devc, 9) & ~0x04);	/* Dual DMA mode */
+		else
+			ad_write(devc, 9, ad_read(devc, 9) | 0x04);	/* Single DMA mode */
+
+		if (devc->model == MD_1845 || devc->model == MD_1845_SSCAPE)
+			ad_write(devc, 27, ad_read(devc, 27) | 0x08);		/* Alternate freq select enabled */
+
+		if (devc->model == MD_IWAVE)
+		{		/* Some magic Interwave specific initialization */
+			ad_write(devc, 12, 0x6c);	/* Select codec mode 3 */
+			ad_write(devc, 16, 0x30);	/* Playback and capture counters enabled */
+			ad_write(devc, 17, 0xc2);	/* Alternate feature enable */
+		}
+	}
+	else
+	{
+		  devc->audio_flags &= ~DMA_DUPLEX;
+		  ad_write(devc, 9, ad_read(devc, 9) | 0x04);	/* Single DMA mode */
+		  if (soundpro)
+			  ad_write(devc, 12, ad_read(devc, 12) | 0x40);	/* Mode2 = enabled */
+	}
+
+	outb((0), io_Status(devc));	/* Clear pending interrupts */
+
+	/*
+	 * Toggle the MCE bit. It completes the initialization phase.
+	 */
+
+	ad_enter_MCE(devc);	/* In case the bit was off */
+	ad_leave_MCE(devc);
+
+	ad1848_mixer_reset(devc);
+}
+
+int ad1848_detect(int io_base, int *ad_flags, int *osp)
+{
+	unsigned char tmp;
+	ad1848_info *devc = &adev_info[nr_ad1848_devs];
+	unsigned char tmp1 = 0xff, tmp2 = 0xff;
+	int optiC930 = 0;	/* OPTi 82C930 flag */
+	int interwave = 0;
+	int ad1847_flag = 0;
+	int cs4248_flag = 0;
+	int sscape_flag = 0;
+
+	int i;
+
+	DDB(printk("ad1848_detect(%x)\n", io_base));
+
+	if (ad_flags)
+	{
+		if (*ad_flags == 0x12345678)
+		{
+			interwave = 1;
+			*ad_flags = 0;
+		}
+		
+		if (*ad_flags == 0x87654321)
+		{
+			sscape_flag = 1;
+			*ad_flags = 0;
+		}
+		
+		if (*ad_flags == 0x12345677)
+		{
+		    cs4248_flag = 1;
+		    *ad_flags = 0;
+		}
+	}
+	if (nr_ad1848_devs >= MAX_AUDIO_DEV)
+	{
+		printk(KERN_ERR "ad1848 - Too many audio devices\n");
+		return 0;
+	}
+	if (check_region(io_base, 4))
+	{
+		printk(KERN_ERR "ad1848.c: Port %x not free.\n", io_base);
+		return 0;
+	}
+	devc->base = io_base;
+	devc->irq_ok = 0;
+	devc->timer_running = 0;
+	devc->MCE_bit = 0x40;
+	devc->irq = 0;
+	devc->open_mode = 0;
+	devc->chip_name = devc->name = "AD1848";
+	devc->model = MD_1848;	/* AD1848 or CS4248 */
+	devc->levels = NULL;
+	devc->debug_flag = 0;
+
+	/*
+	 * Check that the I/O address is in use.
+	 *
+	 * The bit 0x80 of the base I/O port is known to be 0 after the
+	 * chip has performed its power on initialization. Just assume
+	 * this has happened before the OS is starting.
+	 *
+	 * If the I/O address is unused, it typically returns 0xff.
+	 */
+
+	if (inb(devc->base) == 0xff)
+	{
+		DDB(printk("ad1848_detect: The base I/O address appears to be dead\n"));
+	}
+
+	/*
+	 * Wait for the device to stop initialization
+	 */
+	
+	DDB(printk("ad1848_detect() - step 0\n"));
+
+	for (i = 0; i < 10000000; i++)
+	{
+		unsigned char   x = inb(devc->base);
+
+		if (x == 0xff || !(x & 0x80))
+			break;
+	}
+
+	DDB(printk("ad1848_detect() - step A\n"));
+
+	if (inb(devc->base) == 0x80)	/* Not ready. Let's wait */
+		ad_leave_MCE(devc);
+
+	if ((inb(devc->base) & 0x80) != 0x00)	/* Not a AD1848 */
+	{
+		DDB(printk("ad1848 detect error - step A (%02x)\n", (int) inb(devc->base)));
+		return 0;
+	}
+	
+	/*
+	 * Test if it's possible to change contents of the indirect registers.
+	 * Registers 0 and 1 are ADC volume registers. The bit 0x10 is read only
+	 * so try to avoid using it.
+	 */
+
+	DDB(printk("ad1848_detect() - step B\n"));
+	ad_write(devc, 0, 0xaa);
+	ad_write(devc, 1, 0x45);	/* 0x55 with bit 0x10 clear */
+
+	if ((tmp1 = ad_read(devc, 0)) != 0xaa || (tmp2 = ad_read(devc, 1)) != 0x45)
+	{
+		if (tmp2 == 0x65)	/* AD1847 has couple of bits hardcoded to 1 */
+			ad1847_flag = 1;
+		else
+		{
+			DDB(printk("ad1848 detect error - step B (%x/%x)\n", tmp1, tmp2));
+			return 0;
+		}
+	}
+	DDB(printk("ad1848_detect() - step C\n"));
+	ad_write(devc, 0, 0x45);
+	ad_write(devc, 1, 0xaa);
+
+	if ((tmp1 = ad_read(devc, 0)) != 0x45 || (tmp2 = ad_read(devc, 1)) != 0xaa)
+	{
+		if (tmp2 == 0x8a)	/* AD1847 has few bits hardcoded to 1 */
+			ad1847_flag = 1;
+		else
+		{
+			DDB(printk("ad1848 detect error - step C (%x/%x)\n", tmp1, tmp2));
+			return 0;
+		}
+	}
+
+	/*
+	 * The indirect register I12 has some read only bits. Let's
+	 * try to change them.
+	 */
+
+	DDB(printk("ad1848_detect() - step D\n"));
+	tmp = ad_read(devc, 12);
+	ad_write(devc, 12, (~tmp) & 0x0f);
+
+	if ((tmp & 0x0f) != ((tmp1 = ad_read(devc, 12)) & 0x0f))
+	{
+		DDB(printk("ad1848 detect error - step D (%x)\n", tmp1));
+		return 0;
+	}
+	
+	/*
+	 * NOTE! Last 4 bits of the reg I12 tell the chip revision.
+	 *   0x01=RevB and 0x0A=RevC.
+	 */
+
+	/*
+	 * The original AD1848/CS4248 has just 15 indirect registers. This means
+	 * that I0 and I16 should return the same value (etc.).
+	 * However this doesn't work with CS4248. Actually it seems to be impossible
+	 * to detect if the chip is a CS4231 or CS4248.
+	 * Ensure that the Mode2 enable bit of I12 is 0. Otherwise this test fails
+	 * with CS4231.
+	 */
+
+	/*
+	 * OPTi 82C930 has mode2 control bit in another place. This test will fail
+	 * with it. Accept this situation as a possible indication of this chip.
+	 */
+
+	DDB(printk("ad1848_detect() - step F\n"));
+	ad_write(devc, 12, 0);	/* Mode2=disabled */
+
+	for (i = 0; i < 16; i++)
+	{
+		if ((tmp1 = ad_read(devc, i)) != (tmp2 = ad_read(devc, i + 16)))
+		{
+			DDB(printk("ad1848 detect step F(%d/%x/%x) - OPTi chip???\n", i, tmp1, tmp2));
+			if (!ad1847_flag)
+				optiC930 = 1;
+			break;
+		}
+	}
+
+	/*
+	 * Try to switch the chip to mode2 (CS4231) by setting the MODE2 bit (0x40).
+	 * The bit 0x80 is always 1 in CS4248 and CS4231.
+	 */
+
+	DDB(printk("ad1848_detect() - step G\n"));
+
+	if (ad_flags && *ad_flags == 400)
+		*ad_flags = 0;
+	else
+		ad_write(devc, 12, 0x40);	/* Set mode2, clear 0x80 */
+
+
+	if (ad_flags)
+		*ad_flags = 0;
+
+	tmp1 = ad_read(devc, 12);
+	if (tmp1 & 0x80)
+	{
+		if (ad_flags)
+			*ad_flags |= AD_F_CS4248;
+
+		devc->chip_name = "CS4248";	/* Our best knowledge just now */
+	}
+	if (optiC930 || (tmp1 & 0xc0) == (0x80 | 0x40))
+	{
+		/*
+		 *      CS4231 detected - is it?
+		 *
+		 *      Verify that setting I0 doesn't change I16.
+		 */
+		
+		DDB(printk("ad1848_detect() - step H\n"));
+		ad_write(devc, 16, 0);	/* Set I16 to known value */
+
+		ad_write(devc, 0, 0x45);
+		if ((tmp1 = ad_read(devc, 16)) != 0x45)	/* No change -> CS4231? */
+		{
+			ad_write(devc, 0, 0xaa);
+			if ((tmp1 = ad_read(devc, 16)) == 0xaa)	/* Rotten bits? */
+			{
+				DDB(printk("ad1848 detect error - step H(%x)\n", tmp1));
+				return 0;
+			}
+			
+			/*
+			 * Verify that some bits of I25 are read only.
+			 */
+
+			DDB(printk("ad1848_detect() - step I\n"));
+			tmp1 = ad_read(devc, 25);	/* Original bits */
+			ad_write(devc, 25, ~tmp1);	/* Invert all bits */
+			if ((ad_read(devc, 25) & 0xe7) == (tmp1 & 0xe7))
+			{
+				int id;
+
+				/*
+				 *      It's at least CS4231
+				 */
+
+				devc->chip_name = "CS4231";
+				devc->model = MD_4231;
+				
+				/*
+				 * It could be an AD1845 or CS4231A as well.
+				 * CS4231 and AD1845 report the same revision info in I25
+				 * while the CS4231A reports different.
+				 */
+
+				id = ad_read(devc, 25);
+				if ((id & 0xe7) == 0x80)	/* Device busy??? */
+					id = ad_read(devc, 25);
+				if ((id & 0xe7) == 0x80)	/* Device still busy??? */
+					id = ad_read(devc, 25);
+				DDB(printk("ad1848_detect() - step J (%02x/%02x)\n", id, ad_read(devc, 25)));
+
+                                if ((id & 0xe7) == 0x80) {
+					/* 
+					 * It must be a CS4231 or AD1845. The register I23 of
+					 * CS4231 is undefined and it appears to be read only.
+					 * AD1845 uses I23 for setting sample rate. Assume
+					 * the chip is AD1845 if I23 is changeable.
+					 */
+
+					unsigned char   tmp = ad_read(devc, 23);
+					ad_write(devc, 23, ~tmp);
+
+					if (interwave)
+					{
+						devc->model = MD_IWAVE;
+						devc->chip_name = "IWave";
+					}
+					else if (ad_read(devc, 23) != tmp)	/* AD1845 ? */
+					{
+						devc->chip_name = "AD1845";
+						devc->model = MD_1845;
+					}
+					else if (cs4248_flag)
+					{
+						if (ad_flags)
+							  *ad_flags |= AD_F_CS4248;
+						devc->chip_name = "CS4248";
+						devc->model = MD_1848;
+						ad_write(devc, 12, ad_read(devc, 12) & ~0x40);	/* Mode2 off */
+					}
+					ad_write(devc, 23, tmp);	/* Restore */
+				}
+				else
+				{
+					switch (id & 0x1f) {
+					case 3: /* CS4236/CS4235 */
+						{
+							int xid;
+							ad_write(devc, 12, ad_read(devc, 12) | 0x60); /* switch to mode 3 */
+							ad_write(devc, 23, 0x9c); /* select extended register 25 */
+							xid = inb(io_Indexed_Data(devc));
+							ad_write(devc, 12, ad_read(devc, 12) & ~0x60); /* back to mode 0 */
+							if ((xid & 0x1f) == 0x1d) {
+								devc->chip_name = "CS4235";
+								devc->model = MD_4235;
+							} else {
+								devc->chip_name = "CS4236";
+								devc->model = MD_4232;
+							}
+						}
+						break;
+
+					case 2: /* CS4232/CS4232A */
+						devc->chip_name = "CS4232";
+						devc->model = MD_4232;
+						break;
+				
+					case 0:
+						if ((id & 0xe0) == 0xa0)
+						{
+							devc->chip_name = "CS4231A";
+							devc->model = MD_4231A;
+						}
+						else
+						{
+							devc->chip_name = "CS4321";
+							devc->model = MD_4231;
+						}
+						break;
+
+					default: /* maybe */
+						DDB(printk("ad1848: I25 = %02x/%02x\n", ad_read(devc, 25), ad_read(devc, 25) & 0xe7));
+                                                if (optiC930)
+                                                {
+                                                        devc->chip_name = "82C930";
+                                                        devc->model = MD_C930;
+                                                }
+						else
+						{
+							devc->chip_name = "CS4231";
+							devc->model = MD_4231;
+						}
+					}
+				}
+			}
+			ad_write(devc, 25, tmp1);	/* Restore bits */
+
+			DDB(printk("ad1848_detect() - step K\n"));
+		}
+	} else if (tmp1 == 0x0a) {
+		/*
+		 * Is it perhaps a SoundPro CMI8330?
+		 * If so, then we should be able to change indirect registers
+		 * greater than I15 after activating MODE2, even though reading
+		 * back I12 does not show it.
+		 */
+
+		/*
+		 * Let's try comparing register values
+		 */
+		for (i = 0; i < 16; i++) {
+			if ((tmp1 = ad_read(devc, i)) != (tmp2 = ad_read(devc, i + 16))) {
+				DDB(printk("ad1848 detect step H(%d/%x/%x) - SoundPro chip?\n", i, tmp1, tmp2));
+				soundpro = 1;
+				devc->chip_name = "SoundPro CMI 8330";
+				break;
+			}
+		}
+	}
+
+	DDB(printk("ad1848_detect() - step L\n"));
+	if (ad_flags)
+	{
+		  if (devc->model != MD_1848)
+			  *ad_flags |= AD_F_CS4231;
+	}
+	DDB(printk("ad1848_detect() - Detected OK\n"));
+
+	if (devc->model == MD_1848 && ad1847_flag)
+		devc->chip_name = "AD1847";
+
+
+	if (sscape_flag == 1)
+		devc->model = MD_1845_SSCAPE;
+
+	return 1;
+}
+
+int ad1848_init(char *name, int io_base, int irq, int dma_playback, int dma_capture, int share_dma, int *osp)
+{
+	/*
+	 * NOTE! If irq < 0, there is another driver which has allocated the IRQ
+	 *   so that this driver doesn't need to allocate/deallocate it.
+	 *   The actually used IRQ is ABS(irq).
+	 */
+
+
+	int my_dev;
+	char dev_name[100];
+	int e;
+
+	ad1848_info  *devc = &adev_info[nr_ad1848_devs];
+
+	ad1848_port_info *portc = NULL;
+
+	devc->irq = (irq > 0) ? irq : 0;
+	devc->open_mode = 0;
+	devc->timer_ticks = 0;
+	devc->dma1 = dma_playback;
+	devc->dma2 = dma_capture;
+	devc->audio_flags = DMA_AUTOMODE;
+	devc->playback_dev = devc->record_dev = 0;
+	if (name != NULL)
+		devc->name = name;
+
+	if (name != NULL && name[0] != 0)
+		sprintf(dev_name,
+			"%s (%s)", name, devc->chip_name);
+	else
+		sprintf(dev_name,
+			"Generic audio codec (%s)", devc->chip_name);
+
+	request_region(devc->base, 4, devc->name);
+
+	conf_printf2(dev_name, devc->base, devc->irq, dma_playback, dma_capture);
+
+	if (devc->model == MD_1848 || devc->model == MD_C930)
+		devc->audio_flags |= DMA_HARDSTOP;
+
+	if (devc->model > MD_1848)
+	{
+		if (devc->dma1 == devc->dma2 || devc->dma2 == -1 || devc->dma1 == -1)
+			devc->audio_flags &= ~DMA_DUPLEX;
+		else
+			devc->audio_flags |= DMA_DUPLEX;
+	}
+
+	portc = (ad1848_port_info *) kmalloc(sizeof(ad1848_port_info), GFP_KERNEL);
+	if(portc==NULL)
+		return -1;
+		
+	if ((my_dev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
+					     dev_name,
+					     &ad1848_audio_driver,
+					     sizeof(struct audio_driver),
+					     devc->audio_flags,
+					     ad_format_mask[devc->model],
+					     devc,
+					     dma_playback,
+					     dma_capture)) < 0)
+	{
+		kfree(portc);
+		portc=NULL;
+		return -1;
+	}
+	
+	audio_devs[my_dev]->portc = portc;
+	audio_devs[my_dev]->mixer_dev = -1;
+	memset((char *) portc, 0, sizeof(*portc));
+
+	nr_ad1848_devs++;
+
+	ad1848_init_hw(devc);
+
+	if (irq > 0)
+	{
+		devc->dev_no = my_dev;
+		if (request_irq(devc->irq, adintr, 0, devc->name, (void *)my_dev) < 0)
+		{
+			printk(KERN_WARNING "ad1848: Unable to allocate IRQ\n");
+			/* Don't free it either then.. */
+			devc->irq = 0;
+		}
+		if (capabilities[devc->model].flags & CAP_F_TIMER)
+		{
+#ifndef __SMP__
+			int x;
+			unsigned char tmp = ad_read(devc, 16);
+#endif			
+
+			devc->timer_ticks = 0;
+
+			ad_write(devc, 21, 0x00);	/* Timer MSB */
+			ad_write(devc, 20, 0x10);	/* Timer LSB */
+#ifndef __SMP__
+			ad_write(devc, 16, tmp | 0x40);	/* Enable timer */
+			for (x = 0; x < 100000 && devc->timer_ticks == 0; x++);
+			ad_write(devc, 16, tmp & ~0x40);	/* Disable timer */
+
+			if (devc->timer_ticks == 0)
+				printk(KERN_WARNING "ad1848: Interrupt test failed (IRQ%d)\n", irq);
+			else
+			{
+				DDB(printk("Interrupt test OK\n"));
+				devc->irq_ok = 1;
+			}
+#else
+			devc->irq_ok=1;
+#endif			
+		}
+		else
+			devc->irq_ok = 1;	/* Couldn't test. assume it's OK */
+	} else if (irq < 0)
+		irq2dev[-irq] = devc->dev_no = my_dev;
+
+#if defined(CONFIG_SEQUENCER) && !defined(EXCLUDE_TIMERS)
+	if ((capabilities[devc->model].flags & CAP_F_TIMER) &&
+	    devc->irq_ok)
+		ad1848_tmr_install(my_dev);
+#endif
+
+	if (!share_dma)
+	{
+		if (sound_alloc_dma(dma_playback, devc->name))
+			printk(KERN_WARNING "ad1848.c: Can't allocate DMA%d\n", dma_playback);
+
+		if (dma_capture != dma_playback)
+			if (sound_alloc_dma(dma_capture, devc->name))
+				printk(KERN_WARNING "ad1848.c: Can't allocate DMA%d\n", dma_capture);
+	}
+	if ((e = sound_install_mixer(MIXER_DRIVER_VERSION,
+				     dev_name,
+				     &ad1848_mixer_operations,
+				     sizeof(struct mixer_operations),
+				     devc)) >= 0)
+	{
+		audio_devs[my_dev]->mixer_dev = e;
+	}
+	return my_dev;
+}
+
+int ad1848_control(int cmd, int arg)
+{
+	ad1848_info *devc;
+
+	if (nr_ad1848_devs < 1)
+		return -ENODEV;
+
+	devc = &adev_info[nr_ad1848_devs - 1];
+
+	switch (cmd)
+	{
+		case AD1848_SET_XTAL:	/* Change clock frequency of AD1845 (only ) */
+			if (devc->model != MD_1845 || devc->model != MD_1845_SSCAPE)
+				return -EINVAL;
+			ad_enter_MCE(devc);
+			ad_write(devc, 29, (ad_read(devc, 29) & 0x1f) | (arg << 5));
+			ad_leave_MCE(devc);
+			break;
+
+		case AD1848_MIXER_REROUTE:
+		{
+			int o = (arg >> 8) & 0xff;
+			int n = arg & 0xff;
+
+			if (o < 0 || o >= SOUND_MIXER_NRDEVICES)
+				return -EINVAL;
+
+			if (!(devc->supported_devices & (1 << o)) &&
+			    !(devc->supported_rec_devices & (1 << o)))
+				return -EINVAL;
+
+			if (n == SOUND_MIXER_NONE)
+			{	/* Just hide this control */
+				ad1848_mixer_set(devc, o, 0);	/* Shut up it */
+				devc->supported_devices &= ~(1 << o);
+				devc->supported_rec_devices &= ~(1 << o);
+				break;
+			}
+
+			/* Make the mixer control identified by o to appear as n */
+			if (n < 0 || n >= SOUND_MIXER_NRDEVICES)
+				return -EINVAL;
+
+			devc->mixer_reroute[n] = o;	/* Rename the control */
+			if (devc->supported_devices & (1 << o))
+				devc->supported_devices |= (1 << n);
+			if (devc->supported_rec_devices & (1 << o))
+				devc->supported_rec_devices |= (1 << n);
+
+			devc->supported_devices &= ~(1 << o);
+			devc->supported_rec_devices &= ~(1 << o);
+		}
+		break;
+	}
+	return 0;
+}
+
+void ad1848_unload(int io_base, int irq, int dma_playback, int dma_capture, int share_dma)
+{
+	int i, mixer, dev = 0;
+	ad1848_info *devc = NULL;
+
+	for (i = 0; devc == NULL && i < nr_ad1848_devs; i++)
+	{
+		if (adev_info[i].base == io_base)
+		{
+			devc = &adev_info[i];
+			dev = devc->dev_no;
+		}
+	}
+		
+	if (devc != NULL)
+	{
+		if(audio_devs[dev]->portc!=NULL)
+			kfree(audio_devs[dev]->portc);
+		release_region(devc->base, 4);
+
+		if (!share_dma)
+		{
+			if (devc->irq > 0) /* There is no point in freeing irq, if it wasn't allocated */
+				free_irq(devc->irq, (void *)devc->dev_no);
+
+			sound_free_dma(dma_playback);
+
+			if (dma_playback != dma_capture)
+				sound_free_dma(dma_capture);
+
+		}
+		mixer = audio_devs[devc->dev_no]->mixer_dev;
+		if(mixer>=0)
+			sound_unload_mixerdev(mixer);
+
+		nr_ad1848_devs--;
+		for ( ; i < nr_ad1848_devs ; i++)
+			adev_info[i] = adev_info[i+1];
+	}
+	else
+		printk(KERN_ERR "ad1848: Can't find device to be unloaded. Base=%x\n", io_base);
+}
+
+void adintr(int irq, void *dev_id, struct pt_regs *dummy)
+{
+	unsigned char status;
+	ad1848_info *devc;
+	int dev;
+	int alt_stat = 0xff;
+	unsigned char c930_stat = 0;
+	int cnt = 0;
+
+	dev = (int)dev_id;
+	devc = (ad1848_info *) audio_devs[dev]->devc;
+
+interrupt_again:		/* Jump back here if int status doesn't reset */
+
+	status = inb(io_Status(devc));
+
+	if (status == 0x80)
+		printk(KERN_DEBUG "adintr: Why?\n");
+	if (devc->model == MD_1848)
+		outb((0), io_Status(devc));	/* Clear interrupt status */
+
+	if (status & 0x01)
+	{
+		if (devc->model == MD_C930)
+		{		/* 82C930 has interrupt status register in MAD16 register MC11 */
+			unsigned long   flags;
+
+			save_flags(flags);
+			cli();
+
+			/* 0xe0e is C930 address port
+			 * 0xe0f is C930 data port
+			 */
+			outb(11, 0xe0e);
+			c930_stat = inb(0xe0f);
+			outb((~c930_stat), 0xe0f);
+
+			restore_flags(flags);
+
+			alt_stat = (c930_stat << 2) & 0x30;
+		}
+		else if (devc->model != MD_1848)
+		{
+			alt_stat = ad_read(devc, 24);
+			ad_write(devc, 24, ad_read(devc, 24) & ~alt_stat);	/* Selective ack */
+		}
+
+		if ((devc->open_mode & OPEN_READ) && (devc->audio_mode & PCM_ENABLE_INPUT) && (alt_stat & 0x20))
+		{
+			DMAbuf_inputintr(devc->record_dev);
+		}
+		if ((devc->open_mode & OPEN_WRITE) && (devc->audio_mode & PCM_ENABLE_OUTPUT) &&
+		      (alt_stat & 0x10))
+		{
+			DMAbuf_outputintr(devc->playback_dev, 1);
+		}
+		if (devc->model != MD_1848 && (alt_stat & 0x40))	/* Timer interrupt */
+		{
+			devc->timer_ticks++;
+#if defined(CONFIG_SEQUENCER) && !defined(EXCLUDE_TIMERS)
+			if (timer_installed == dev && devc->timer_running)
+				sound_timer_interrupt();
+#endif
+		}
+	}
+/*
+ * Sometimes playback or capture interrupts occur while a timer interrupt
+ * is being handled. The interrupt will not be retriggered if we don't
+ * handle it now. Check if an interrupt is still pending and restart
+ * the handler in this case.
+ */
+	if (inb(io_Status(devc)) & 0x01 && cnt++ < 4)
+	{
+		  goto interrupt_again;
+	}
+}
+
+/*
+ *	Experimental initialization sequence for the integrated sound system
+ *	of the Compaq Deskpro M.
+ */
+
+static int init_deskpro_m(struct address_info *hw_config)
+{
+	unsigned char   tmp;
+
+	if ((tmp = inb(0xc44)) == 0xff)
+	{
+		DDB(printk("init_deskpro_m: Dead port 0xc44\n"));
+		return 0;
+	}
+
+	outb(0x10, 0xc44);
+	outb(0x40, 0xc45);
+	outb(0x00, 0xc46);
+	outb(0xe8, 0xc47);
+	outb(0x14, 0xc44);
+	outb(0x40, 0xc45);
+	outb(0x00, 0xc46);
+	outb(0xe8, 0xc47);
+	outb(0x10, 0xc44);
+
+	return 1;
+}
+
+/*
+ *	Experimental initialization sequence for the integrated sound system
+ *	of Compaq Deskpro XL.
+ */
+
+static int init_deskpro(struct address_info *hw_config)
+{
+	unsigned char   tmp;
+
+	if ((tmp = inb(0xc44)) == 0xff)
+	{
+		DDB(printk("init_deskpro: Dead port 0xc44\n"));
+		return 0;
+	}
+	outb((tmp | 0x04), 0xc44);	/* Select bank 1 */
+	if (inb(0xc44) != 0x04)
+	{
+		DDB(printk("init_deskpro: Invalid bank1 signature in port 0xc44\n"));
+		return 0;
+	}
+	/*
+	 * OK. It looks like a Deskpro so let's proceed.
+	 */
+
+	/*
+	 * I/O port 0xc44 Audio configuration register.
+	 *
+	 * bits 0xc0:   Audio revision bits
+	 *              0x00 = Compaq Business Audio
+	 *              0x40 = MS Sound System Compatible (reset default)
+	 *              0x80 = Reserved
+	 *              0xc0 = Reserved
+	 * bit 0x20:    No Wait State Enable
+	 *              0x00 = Disabled (reset default, DMA mode)
+	 *              0x20 = Enabled (programmed I/O mode)
+	 * bit 0x10:    MS Sound System Decode Enable
+	 *              0x00 = Decoding disabled (reset default)
+	 *              0x10 = Decoding enabled
+	 * bit 0x08:    FM Synthesis Decode Enable
+	 *              0x00 = Decoding Disabled (reset default)
+	 *              0x08 = Decoding enabled
+	 * bit 0x04     Bank select
+	 *              0x00 = Bank 0
+	 *              0x04 = Bank 1
+	 * bits 0x03    MSS Base address
+	 *              0x00 = 0x530 (reset default)
+	 *              0x01 = 0x604
+	 *              0x02 = 0xf40
+	 *              0x03 = 0xe80
+	 */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc44 (before): ");
+	outb((tmp & ~0x04), 0xc44);
+	printk("%02x ", inb(0xc44));
+	outb((tmp | 0x04), 0xc44);
+	printk("%02x\n", inb(0xc44));
+#endif
+
+	/* Set bank 1 of the register */
+	tmp = 0x58;		/* MSS Mode, MSS&FM decode enabled */
+
+	switch (hw_config->io_base)
+	{
+		case 0x530:
+			tmp |= 0x00;
+			break;
+		case 0x604:
+			tmp |= 0x01;
+			break;
+		case 0xf40:
+			tmp |= 0x02;
+			break;
+		case 0xe80:
+			tmp |= 0x03;
+			break;
+		default:
+			DDB(printk("init_deskpro: Invalid MSS port %x\n", hw_config->io_base));
+			return 0;
+	}
+	outb((tmp & ~0x04), 0xc44);	/* Write to bank=0 */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc44 (after): ");
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	printk("%02x ", inb(0xc44));
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	printk("%02x\n", inb(0xc44));
+#endif
+
+	/*
+	 * I/O port 0xc45 FM Address Decode/MSS ID Register.
+	 *
+	 * bank=0, bits 0xfe:   FM synthesis Decode Compare bits 7:1 (default=0x88)
+	 * bank=0, bit 0x01:    SBIC Power Control Bit
+	 *                      0x00 = Powered up
+	 *                      0x01 = Powered down
+	 * bank=1, bits 0xfc:   MSS ID (default=0x40)
+	 */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc45 (before): ");
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	printk("%02x ", inb(0xc45));
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	printk("%02x\n", inb(0xc45));
+#endif
+
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	outb((0x88), 0xc45);	/* FM base 7:0 = 0x88 */
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	outb((0x10), 0xc45);	/* MSS ID = 0x10 (MSS port returns 0x04) */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc45 (after): ");
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	printk("%02x ", inb(0xc45));
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	printk("%02x\n", inb(0xc45));
+#endif
+
+
+	/*
+	 * I/O port 0xc46 FM Address Decode/Address ASIC Revision Register.
+	 *
+	 * bank=0, bits 0xff:   FM synthesis Decode Compare bits 15:8 (default=0x03)
+	 * bank=1, bits 0xff:   Audio addressing ASIC id
+	 */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc46 (before): ");
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	printk("%02x ", inb(0xc46));
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	printk("%02x\n", inb(0xc46));
+#endif
+
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	outb((0x03), 0xc46);	/* FM base 15:8 = 0x03 */
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	outb((0x11), 0xc46);	/* ASIC ID = 0x11 */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc46 (after): ");
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	printk("%02x ", inb(0xc46));
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	printk("%02x\n", inb(0xc46));
+#endif
+
+	/*
+	 * I/O port 0xc47 FM Address Decode Register.
+	 *
+	 * bank=0, bits 0xff:   Decode enable selection for various FM address bits
+	 * bank=1, bits 0xff:   Reserved
+	 */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc47 (before): ");
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	printk("%02x ", inb(0xc47));
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	printk("%02x\n", inb(0xc47));
+#endif
+
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	outb((0x7c), 0xc47);	/* FM decode enable bits = 0x7c */
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	outb((0x00), 0xc47);	/* Reserved bank1 = 0x00 */
+
+#ifdef DEBUGXL
+	/* Debug printing */
+	printk("Port 0xc47 (after): ");
+	outb((tmp & ~0x04), 0xc44);	/* Select bank=0 */
+	printk("%02x ", inb(0xc47));
+	outb((tmp | 0x04), 0xc44);	/* Select bank=1 */
+	printk("%02x\n", inb(0xc47));
+#endif
+
+	/*
+	 * I/O port 0xc6f = Audio Disable Function Register
+	 */
+
+#ifdef DEBUGXL
+	printk("Port 0xc6f (before) = %02x\n", inb(0xc6f));
+#endif
+
+	outb((0x80), 0xc6f);
+
+#ifdef DEBUGXL
+	printk("Port 0xc6f (after) = %02x\n", inb(0xc6f));
+#endif
+
+	return 1;
+}
+
+int probe_ms_sound(struct address_info *hw_config)
+{
+	unsigned char   tmp;
+
+	DDB(printk("Entered probe_ms_sound(%x, %d)\n", hw_config->io_base, hw_config->card_subtype));
+
+	if (check_region(hw_config->io_base, 8))
+	{
+		printk(KERN_ERR "MSS: I/O port conflict\n");
+		return 0;
+	}
+	if (hw_config->card_subtype == 1)	/* Has no IRQ/DMA registers */
+	{
+		/* check_opl3(0x388, hw_config); */
+		return ad1848_detect(hw_config->io_base + 4, NULL, hw_config->osp);
+	}
+
+	if (deskpro_xl && hw_config->card_subtype == 2)	/* Compaq Deskpro XL */
+	{
+		if (!init_deskpro(hw_config))
+			return 0;
+	}
+
+	if (deskpro_m)	/* Compaq Deskpro M */
+	{
+		if (!init_deskpro_m(hw_config))
+			return 0;
+	}
+
+	/*
+	   * Check if the IO port returns valid signature. The original MS Sound
+	   * system returns 0x04 while some cards (AudioTrix Pro for example)
+	   * return 0x00 or 0x0f.
+	 */
+
+	if ((tmp = inb(hw_config->io_base + 3)) == 0xff)	/* Bus float */
+	{
+		  int             ret;
+
+		  DDB(printk("I/O address is inactive (%x)\n", tmp));
+		  if (!(ret = ad1848_detect(hw_config->io_base + 4, NULL, hw_config->osp)))
+			  return 0;
+		  return 1;
+	}
+	DDB(printk("MSS signature = %x\n", tmp & 0x3f));
+	if ((tmp & 0x3f) != 0x04 &&
+	    (tmp & 0x3f) != 0x0f &&
+	    (tmp & 0x3f) != 0x00)
+	{
+		int ret;
+
+		MDB(printk(KERN_ERR "No MSS signature detected on port 0x%x (0x%x)\n", hw_config->io_base, (int) inb(hw_config->io_base + 3)));
+		DDB(printk("Trying to detect codec anyway but IRQ/DMA may not work\n"));
+		if (!(ret = ad1848_detect(hw_config->io_base + 4, NULL, hw_config->osp)))
+			return 0;
+
+		hw_config->card_subtype = 1;
+		return 1;
+	}
+	if ((hw_config->irq != 5)  &&
+	    (hw_config->irq != 7)  &&
+	    (hw_config->irq != 9)  &&
+	    (hw_config->irq != 10) &&
+	    (hw_config->irq != 11) &&
+	    (hw_config->irq != 12))
+	{
+		printk(KERN_ERR "MSS: Bad IRQ %d\n", hw_config->irq);
+		return 0;
+	}
+	if (hw_config->dma != 0 && hw_config->dma != 1 && hw_config->dma != 3)
+	{
+		  printk(KERN_ERR "MSS: Bad DMA %d\n", hw_config->dma);
+		  return 0;
+	}
+	/*
+	 * Check that DMA0 is not in use with a 8 bit board.
+	 */
+
+	if (hw_config->dma == 0 && inb(hw_config->io_base + 3) & 0x80)
+	{
+		printk(KERN_ERR "MSS: Can't use DMA0 with a 8 bit card/slot\n");
+		return 0;
+	}
+	if (hw_config->irq > 7 && hw_config->irq != 9 && inb(hw_config->io_base + 3) & 0x80)
+	{
+		printk(KERN_ERR "MSS: Can't use IRQ%d with a 8 bit card/slot\n", hw_config->irq);
+		return 0;
+	}
+	return ad1848_detect(hw_config->io_base + 4, NULL, hw_config->osp);
+}
+
+void attach_ms_sound(struct address_info *hw_config)
+{
+	static signed char interrupt_bits[12] =
+	{
+		-1, -1, -1, -1, -1, 0x00, -1, 0x08, -1, 0x10, 0x18, 0x20
+	};
+	signed char     bits;
+	char            dma2_bit = 0;
+
+	static char     dma_bits[4] =
+	{
+		1, 2, 0, 3
+	};
+
+	int config_port = hw_config->io_base + 0;
+	int version_port = hw_config->io_base + 3;
+	int dma = hw_config->dma;
+	int dma2 = hw_config->dma2;
+
+	if (hw_config->card_subtype == 1)	/* Has no IRQ/DMA registers */
+	{
+		hw_config->slots[0] = ad1848_init("MS Sound System", hw_config->io_base + 4,
+						    hw_config->irq,
+						    hw_config->dma,
+				     hw_config->dma2, 0, hw_config->osp);
+		request_region(hw_config->io_base, 4, "WSS config");
+		return;
+	}
+	/*
+	 * Set the IRQ and DMA addresses.
+	 */
+
+	bits = interrupt_bits[hw_config->irq];
+	if (bits == -1)
+	{
+		printk(KERN_ERR "MSS: Bad IRQ %d\n", hw_config->irq);
+		return;
+	}
+	outb((bits | 0x40), config_port);
+	if ((inb(version_port) & 0x40) == 0)
+		printk(KERN_ERR "[MSS: IRQ Conflict?]\n");
+
+/*
+ * Handle the capture DMA channel
+ */
+
+	if (dma2 != -1 && dma2 != dma)
+	{
+		if (!((dma == 0 && dma2 == 1) ||
+			(dma == 1 && dma2 == 0) ||
+			(dma == 3 && dma2 == 0)))
+		{	/* Unsupported combination. Try to swap channels */
+			int tmp = dma;
+
+			dma = dma2;
+			dma2 = tmp;
+		}
+		if ((dma == 0 && dma2 == 1) ||
+			(dma == 1 && dma2 == 0) ||
+			(dma == 3 && dma2 == 0))
+		{
+			dma2_bit = 0x04;	/* Enable capture DMA */
+		}
+		else
+		{
+			printk(KERN_WARNING "MSS: Invalid capture DMA\n");
+			dma2 = dma;
+		}
+	}
+	else
+	{
+		dma2 = dma;
+	}
+
+	hw_config->dma = dma;
+	hw_config->dma2 = dma2;
+
+	outb((bits | dma_bits[dma] | dma2_bit), config_port);	/* Write IRQ+DMA setup */
+
+	hw_config->slots[0] = ad1848_init("MSS audio codec", hw_config->io_base + 4,
+					  hw_config->irq,
+					  dma,
+					  dma2, 0,
+					  hw_config->osp);
+	request_region(hw_config->io_base, 4, "WSS config");
+}
+
+void unload_ms_sound(struct address_info *hw_config)
+{
+	ad1848_unload(hw_config->io_base + 4,
+		      hw_config->irq,
+		      hw_config->dma,
+		      hw_config->dma2, 0);
+	sound_unload_audiodev(hw_config->slots[0]);
+	release_region(hw_config->io_base, 4);
+}
+
+#if defined(CONFIG_SEQUENCER) && !defined(EXCLUDE_TIMERS)
+
+/*
+ * Timer stuff (for /dev/music).
+ */
+
+static unsigned int current_interval = 0;
+
+static unsigned int ad1848_tmr_start(int dev, unsigned int usecs)
+{
+	unsigned long   flags;
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+	unsigned long   xtal_nsecs;	/* nanoseconds per xtal oscillator tick */
+	unsigned long   divider;
+
+	save_flags(flags);
+	cli();
+
+	/*
+	 * Length of the timer interval (in nanoseconds) depends on the
+	 * selected crystal oscillator. Check this from bit 0x01 of I8.
+	 *
+	 * AD1845 has just one oscillator which has cycle time of 10.050 us
+	 * (when a 24.576 MHz xtal oscillator is used).
+	 *
+	 * Convert requested interval to nanoseconds before computing
+	 * the timer divider.
+	 */
+
+	if (devc->model == MD_1845 || devc->model == MD_1845_SSCAPE)
+		xtal_nsecs = 10050;
+	else if (ad_read(devc, 8) & 0x01)
+		xtal_nsecs = 9920;
+	else
+		xtal_nsecs = 9969;
+
+	divider = (usecs * 1000 + xtal_nsecs / 2) / xtal_nsecs;
+
+	if (divider < 100)	/* Don't allow shorter intervals than about 1ms */
+		divider = 100;
+
+	if (divider > 65535)	/* Overflow check */
+		divider = 65535;
+
+	ad_write(devc, 21, (divider >> 8) & 0xff);	/* Set upper bits */
+	ad_write(devc, 20, divider & 0xff);	/* Set lower bits */
+	ad_write(devc, 16, ad_read(devc, 16) | 0x40);	/* Start the timer */
+	devc->timer_running = 1;
+	restore_flags(flags);
+
+	return current_interval = (divider * xtal_nsecs + 500) / 1000;
+}
+
+static void ad1848_tmr_reprogram(int dev)
+{
+	/*
+	 *    Audio driver has changed sampling rate so that a different xtal
+	 *      oscillator was selected. We have to reprogram the timer rate.
+	 */
+
+	ad1848_tmr_start(dev, current_interval);
+	sound_timer_syncinterval(current_interval);
+}
+
+static void ad1848_tmr_disable(int dev)
+{
+	unsigned long   flags;
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+
+	save_flags(flags);
+	cli();
+	ad_write(devc, 16, ad_read(devc, 16) & ~0x40);
+	devc->timer_running = 0;
+	restore_flags(flags);
+}
+
+static void ad1848_tmr_restart(int dev)
+{
+	unsigned long   flags;
+	ad1848_info    *devc = (ad1848_info *) audio_devs[dev]->devc;
+
+	if (current_interval == 0)
+		return;
+
+	save_flags(flags);
+	cli();
+	ad_write(devc, 16, ad_read(devc, 16) | 0x40);
+	devc->timer_running = 1;
+	restore_flags(flags);
+}
+
+static struct sound_lowlev_timer ad1848_tmr =
+{
+	0,
+	2,
+	ad1848_tmr_start,
+	ad1848_tmr_disable,
+	ad1848_tmr_restart
+};
+
+static int ad1848_tmr_install(int dev)
+{
+	if (timer_installed != -1)
+		return 0;	/* Don't install another timer */
+
+	timer_installed = ad1848_tmr.dev = dev;
+	sound_timer_init(&ad1848_tmr, audio_devs[dev]->name);
+
+	return 1;
+}
+#endif
+
+
+EXPORT_SYMBOL(ad1848_detect);
+EXPORT_SYMBOL(ad1848_init);
+EXPORT_SYMBOL(ad1848_unload);
+EXPORT_SYMBOL(ad1848_control);
+EXPORT_SYMBOL(adintr);
+EXPORT_SYMBOL(probe_ms_sound);
+EXPORT_SYMBOL(attach_ms_sound);
+EXPORT_SYMBOL(unload_ms_sound);
+
+#ifdef MODULE
+
+MODULE_PARM(io, "i");			/* I/O for a raw AD1848 card */
+MODULE_PARM(irq, "i");			/* IRQ to use */
+MODULE_PARM(dma, "i");			/* First DMA channel */
+MODULE_PARM(dma2, "i");			/* Second DMA channel */
+MODULE_PARM(type, "i");			/* Card type */
+MODULE_PARM(deskpro_xl, "i");		/* Special magic for Deskpro XL boxen */
+MODULE_PARM(deskpro_m, "i");		/* Special magic for Deskpro M box */
+MODULE_PARM(soundpro, "i");		/* More special magic for SoundPro chips */
+
+int io = -1;
+int irq = -1;
+int dma = -1;
+int dma2 = -1;
+int type = 0;
+
+static int loaded = 0;
+
+struct address_info hw_config;
+
+int init_module(void)
+{
+	printk(KERN_INFO "ad1848/cs4248 codec driver Copyright (C) by Hannu Savolainen 1993-1996\n");
+	if(io != -1)
+	{
+		if(irq == -1 || dma == -1)
+		{
+			printk(KERN_WARNING "ad1848: must give I/O , IRQ and DMA.\n");
+			return -EINVAL;
+		}
+		hw_config.irq = irq;
+		hw_config.io_base = io;
+		hw_config.dma = dma;
+		hw_config.dma2 = dma2;
+		hw_config.card_subtype = type;
+		if(!probe_ms_sound(&hw_config))
+			return -ENODEV;
+		attach_ms_sound(&hw_config);
+		loaded=1;
+	}
+	SOUND_LOCK;
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	SOUND_LOCK_END;
+	if(loaded)
+		unload_ms_sound(&hw_config);
+}
+
+#endif
+#endif
