Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 3159 insertions, 0 deletions

diff --git a/sound/oss/ad1848.c b/sound/oss/ad1848.c
new file mode 100644
index 000000000000..4384dac3f794
--- /dev/null
+++ b/sound/oss/ad1848.c
@@ -0,0 +1,3159 @@
+/*
+ * 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.
+ * Christoph Hellwig	: adapted to module_init/module_exit
+ * Aki Laukkanen	: added power management support
+ * Arnaldo C. de Melo	: added missing restore_flags in ad1848_resume
+ * Miguel Freitas       : added ISA PnP support
+ * Alan Cox		: Added CS4236->4239 identification
+ * Daniel T. Cobra	: Alernate config/mixer for later chips
+ * Alan Cox		: Merged chip idents and config code
+ *
+ * TODO
+ *		APM save restore assist code on IBM thinkpad
+ *
+ * Status:
+ *		Tested. Believed fully functional.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/stddef.h>
+#include <linux/pm.h>
+#include <linux/isapnp.h>
+#include <linux/pnp.h>
+#include <linux/spinlock.h>
+
+#define DEB(x)
+#define DEB1(x)
+#include "sound_config.h"
+
+#include "ad1848.h"
+#include "ad1848_mixer.h"
+
+typedef struct
+{
+	spinlock_t	lock;
+	int             base;
+	int             irq;
+	int             dma1, dma2;
+	int             dual_dma;	/* 1, when two DMA channels allocated */
+	int 		subtype;
+	unsigned char   MCE_bit;
+	unsigned char   saved_regs[64];	/* Includes extended register space */
+	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*/
+#define MD_4236		10 /* 4236 and higher */
+#define MD_42xB		11 /* CS 42xB */
+#define MD_4239		12 /* CS4239 */
+
+	/* 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;
+
+	/* Power management */
+	struct		pm_dev *pmdev;
+} 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 struct address_info cfg;
+static int nr_ad1848_devs;
+
+static int deskpro_xl;
+static int deskpro_m;
+static int soundpro;
+
+static volatile signed char irq2dev[17] = {
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1, -1
+};
+
+#ifndef EXCLUDE_TIMERS
+static int timer_installed = -1;
+#endif
+
+static int loaded;
+
+static int ad_format_mask[13 /*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*/,
+	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
+};
+
+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 */
+};
+
+#ifdef CONFIG_PNP
+static int isapnp	= 1;
+static int isapnpjump;
+static int reverse;
+
+static int audio_activated;
+#else
+static int isapnp;
+#endif
+
+
+
+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);
+static int	ad1848_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data);
+
+#ifndef 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)
+{
+	int x;
+	int timeout = 900000;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/*Are we initializing */
+		timeout--;
+
+	if(reg < 32)
+	{
+		outb(((unsigned char) (reg & 0xff) | devc->MCE_bit), io_Index_Addr(devc));
+		x = inb(io_Indexed_Data(devc));
+	}
+	else
+	{
+		int xreg, xra;
+
+		xreg = (reg & 0xff) - 32;
+		xra = (((xreg & 0x0f) << 4) & 0xf0) | 0x08 | ((xreg & 0x10) >> 2);
+		outb(((unsigned char) (23 & 0xff) | devc->MCE_bit), io_Index_Addr(devc));
+		outb(((unsigned char) (xra & 0xff)), io_Indexed_Data(devc));
+		x = inb(io_Indexed_Data(devc));
+	}
+
+	return x;
+}
+
+static void ad_write(ad1848_info * devc, int reg, int data)
+{
+	int timeout = 900000;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/* Are we initializing */
+		timeout--;
+
+	if(reg < 32)
+	{
+		outb(((unsigned char) (reg & 0xff) | devc->MCE_bit), io_Index_Addr(devc));
+		outb(((unsigned char) (data & 0xff)), io_Indexed_Data(devc));
+	}
+	else
+	{
+		int xreg, xra;
+		
+		xreg = (reg & 0xff) - 32;
+		xra = (((xreg & 0x0f) << 4) & 0xf0) | 0x08 | ((xreg & 0x10) >> 2);
+		outb(((unsigned char) (23 & 0xff) | devc->MCE_bit), io_Index_Addr(devc));
+		outb(((unsigned char) (xra & 0xff)), io_Indexed_Data(devc));
+		outb((unsigned char) (data & 0xff), io_Indexed_Data(devc));
+	}
+}
+
+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)
+{
+	int timeout = 1000;
+	unsigned short prev;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/*Are we initializing */
+		timeout--;
+
+	devc->MCE_bit = 0x40;
+	prev = inb(io_Index_Addr(devc));
+	if (prev & 0x40)
+	{
+		return;
+	}
+	outb((devc->MCE_bit), io_Index_Addr(devc));
+}
+
+static void ad_leave_MCE(ad1848_info * devc)
+{
+	unsigned char prev, acal;
+	int timeout = 1000;
+
+	while (timeout > 0 && inb(devc->base) == 0x80)	/*Are we initializing */
+		timeout--;
+
+	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 */
+	{
+		return;
+	}
+	outb((0x00), io_Index_Addr(devc));	/* Clear the MCE bit */
+	if (acal & 0x08)	/* Auto calibration is enabled */
+		wait_for_calibration(devc);
+}
+
+static int ad1848_set_recmask(ad1848_info * devc, int mask)
+{
+	unsigned char   recdev;
+	int             i, n;
+	unsigned long flags;
+
+	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++;
+
+	spin_lock_irqsave(&devc->lock,flags);
+	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);
+			}
+		}
+	}
+	spin_unlock_irqrestore(&devc->lock,flags);
+
+	/* 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;
+	unsigned long flags;
+
+	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);
+
+	spin_lock_irqsave(&devc->lock,flags);
+	ad_write(devc, regoffs, val);
+	devc->saved_regs[regoffs] = val;
+	if (muteregoffs != regoffs) {
+		ad_write(devc, muteregoffs, muteval);
+		devc->saved_regs[muteregoffs] = muteval;
+	}
+	spin_unlock_irqrestore(&devc->lock,flags);
+}
+
+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];
+	unsigned long flags;
+
+	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_42xB:
+		case MD_4239:
+			devc->mix_devices = &(cs42xb_mix_devices[0]);
+			devc->supported_devices = MODE3_MIXER_DEVICES;
+			break;
+		case MD_4232:
+		case MD_4235:
+		case MD_4236:
+			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;
+
+	spin_lock_irqsave(&devc->lock,flags);
+	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);
+	}
+	spin_unlock_irqrestore(&devc->lock,flags);
+}
+
+static int ad1848_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
+{
+	ad1848_info *devc = mixer_devs[dev]->devc;
+	int val;
+
+	if (cmd == SOUND_MIXER_PRIVATE1) 
+	{
+		if (get_user(val, (int __user *)arg))
+			return -EFAULT;
+
+		if (val != 0xffff) 
+		{
+			unsigned long flags;
+			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;
+			spin_lock_irqsave(&devc->lock,flags);
+			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 */
+			spin_unlock_irqrestore(&devc->lock,flags);
+		}
+		val = devc->mixer_output_port;
+		return put_user(val, (int __user *)arg);
+	}
+	if (cmd == SOUND_MIXER_PRIVATE2)
+	{
+		if (get_user(val, (int __user *)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 __user *)arg))
+						return -EFAULT;
+					val = ad1848_set_recmask(devc, val);
+					break;
+				
+				default:
+					if (get_user(val, (int __user *)arg))
+					return -EFAULT;
+					val = ad1848_mixer_set(devc, cmd & 0xff, val);
+					break;
+			} 
+			return put_user(val, (int __user *)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 __user *)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 =
+{
+	.owner			= THIS_MODULE,
+	.open			= ad1848_open,
+	.close			= ad1848_close,
+	.output_block		= ad1848_output_block,
+	.start_input		= ad1848_start_input,
+	.prepare_for_input	= ad1848_prepare_for_input,
+	.prepare_for_output	= ad1848_prepare_for_output,
+	.halt_io		= ad1848_halt,
+	.halt_input		= ad1848_halt_input,
+	.halt_output		= ad1848_halt_output,
+	.trigger		= ad1848_trigger,
+	.set_speed		= ad1848_set_speed,
+	.set_bits		= ad1848_set_bits,
+	.set_channels		= ad1848_set_channels
+};
+
+static struct mixer_operations ad1848_mixer_operations =
+{
+	.owner	= THIS_MODULE,
+	.id	= "SOUNDPORT",
+	.name	= "AD1848/CS4248/CS4231",
+	.ioctl	= ad1848_mixer_ioctl
+};
+
+static int ad1848_open(int dev, int mode)
+{
+	ad1848_info    *devc;
+	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;
+
+	/* here we don't have to protect against intr */
+	spin_lock(&devc->lock);
+	if (portc->open_mode || (devc->open_mode & mode))
+	{
+		spin_unlock(&devc->lock);
+		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;
+	spin_unlock(&devc->lock);
+	ad1848_trigger(dev, 0);
+
+	if (mode & OPEN_READ)
+		devc->record_dev = dev;
+	if (mode & OPEN_WRITE)
+		devc->playback_dev = dev;
+/*
+ * Mute output until the playback really starts. This decreases clicking (hope so).
+ */
+	spin_lock_irqsave(&devc->lock,flags);
+	ad_mute(devc);
+	spin_unlock_irqrestore(&devc->lock,flags);
+
+	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"));
+
+	devc->intr_active = 0;
+	ad1848_halt(dev);
+
+	spin_lock_irqsave(&devc->lock,flags);
+
+	devc->audio_mode = 0;
+	devc->open_mode &= ~portc->open_mode;
+	portc->open_mode = 0;
+
+	ad_unmute(devc);
+	spin_unlock_irqrestore(&devc->lock,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
+			 */
+	}
+	spin_lock_irqsave(&devc->lock,flags);
+
+	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;
+	spin_unlock_irqrestore(&devc->lock,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
+			 */
+	}
+	spin_lock_irqsave(&devc->lock,flags);
+
+	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;
+	spin_unlock_irqrestore(&devc->lock,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);
+
+	spin_lock_irqsave(&devc->lock,flags);
+	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 || devc->model >= MD_4236)
+	{
+		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.
+				 */
+	spin_unlock_irqrestore(&devc->lock,flags);
+	devc->xfer_count = 0;
+
+#ifndef 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;
+
+	spin_lock_irqsave(&devc->lock,flags);
+	fs = portc->speed_bits | (portc->format_bits << 5);
+
+	if (portc->channels > 1)