ALSA: Turtle Beach Multisound Classic/Pinnacle driver

This is driver for Turtle Beach Multisound cards:
Classic, Fiji and Pinnacle.

Tested pcm playback and recording and MIDI playback
on Multisound Pinnacle.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 702 insertions, 0 deletions

diff --git a/sound/isa/msnd/msnd.c b/sound/isa/msnd/msnd.c
new file mode 100644
index 000000000000..264e08212c69
--- /dev/null
+++ b/sound/isa/msnd/msnd.c
@@ -0,0 +1,702 @@
+/*********************************************************************
+ *
+ * 2002/06/30 Karsten Wiese:
+ *	removed kernel-version dependencies.
+ *	ripped from linux kernel 2.4.18 (OSS Implementation) by me.
+ *	In the OSS Version, this file is compiled to a separate MODULE,
+ *	that is used by the pinnacle and the classic driver.
+ *	since there is no classic driver for alsa yet (i dont have a classic
+ *	& writing one blindfold is difficult) this file's object is statically
+ *	linked into the pinnacle-driver-module for now.	look for the string
+ *		"uncomment this to make this a module again"
+ *	to do guess what.
+ *
+ * the following is a copy of the 2.4.18 OSS FREE file-heading comment:
+ *
+ * msnd.c - Driver Base
+ *
+ * Turtle Beach MultiSound Sound Card Driver for Linux
+ *
+ * Copyright (C) 1998 Andrew Veliath
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ ********************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "msnd.h"
+
+#define LOGNAME			"msnd"
+
+
+void snd_msnd_init_queue(void *base, int start, int size)
+{
+	writew(PCTODSP_BASED(start), base + JQS_wStart);
+	writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
+	writew(0, base + JQS_wHead);
+	writew(0, base + JQS_wTail);
+}
+EXPORT_SYMBOL(snd_msnd_init_queue);
+
+static int snd_msnd_wait_TXDE(struct snd_msnd *dev)
+{
+	unsigned int io = dev->io;
+	int timeout = 1000;
+
+	while (timeout-- > 0)
+		if (inb(io + HP_ISR) & HPISR_TXDE)
+			return 0;
+
+	return -EIO;
+}
+
+static int snd_msnd_wait_HC0(struct snd_msnd *dev)
+{
+	unsigned int io = dev->io;
+	int timeout = 1000;
+
+	while (timeout-- > 0)
+		if (!(inb(io + HP_CVR) & HPCVR_HC))
+			return 0;
+
+	return -EIO;
+}
+
+int snd_msnd_send_dsp_cmd(struct snd_msnd *dev, u8 cmd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->lock, flags);
+	if (snd_msnd_wait_HC0(dev) == 0) {
+		outb(cmd, dev->io + HP_CVR);
+		spin_unlock_irqrestore(&dev->lock, flags);
+		return 0;
+	}
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	snd_printd(KERN_ERR LOGNAME ": Send DSP command timeout\n");
+
+	return -EIO;
+}
+EXPORT_SYMBOL(snd_msnd_send_dsp_cmd);
+
+int snd_msnd_send_word(struct snd_msnd *dev, unsigned char high,
+		   unsigned char mid, unsigned char low)
+{
+	unsigned int io = dev->io;
+
+	if (snd_msnd_wait_TXDE(dev) == 0) {
+		outb(high, io + HP_TXH);
+		outb(mid, io + HP_TXM);
+		outb(low, io + HP_TXL);
+		return 0;
+	}
+
+	snd_printd(KERN_ERR LOGNAME ": Send host word timeout\n");
+
+	return -EIO;
+}
+EXPORT_SYMBOL(snd_msnd_send_word);
+
+int snd_msnd_upload_host(struct snd_msnd *dev, const u8 *bin, int len)
+{
+	int i;
+
+	if (len % 3 != 0) {
+		snd_printk(KERN_ERR LOGNAME
+			   ": Upload host data not multiple of 3!\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < len; i += 3)
+		if (snd_msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]))
+			return -EIO;
+
+	inb(dev->io + HP_RXL);
+	inb(dev->io + HP_CVR);
+
+	return 0;
+}
+EXPORT_SYMBOL(snd_msnd_upload_host);
+
+int snd_msnd_enable_irq(struct snd_msnd *dev)
+{
+	unsigned long flags;
+
+	if (dev->irq_ref++)
+		return 0;
+
+	snd_printdd(LOGNAME ": Enabling IRQ\n");
+
+	spin_lock_irqsave(&dev->lock, flags);
+	if (snd_msnd_wait_TXDE(dev) == 0) {
+		outb(inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
+		if (dev->type == msndClassic)
+			outb(dev->irqid, dev->io + HP_IRQM);
+
+		outb(inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
+		outb(inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
+		enable_irq(dev->irq);
+		snd_msnd_init_queue(dev->DSPQ, dev->dspq_data_buff,
+				    dev->dspq_buff_size);
+		spin_unlock_irqrestore(&dev->lock, flags);
+		return 0;
+	}
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	snd_printd(KERN_ERR LOGNAME ": Enable IRQ failed\n");
+
+	return -EIO;
+}
+EXPORT_SYMBOL(snd_msnd_enable_irq);
+
+int snd_msnd_disable_irq(struct snd_msnd *dev)
+{
+	unsigned long flags;
+
+	if (--dev->irq_ref > 0)
+		return 0;
+
+	if (dev->irq_ref < 0)
+		snd_printd(KERN_WARNING LOGNAME ": IRQ ref count is %d\n",
+			   dev->irq_ref);
+
+	snd_printdd(LOGNAME ": Disabling IRQ\n");
+
+	spin_lock_irqsave(&dev->lock, flags);
+	if (snd_msnd_wait_TXDE(dev) == 0) {
+		outb(inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
+		if (dev->type == msndClassic)
+			outb(HPIRQ_NONE, dev->io + HP_IRQM);
+		disable_irq(dev->irq);
+		spin_unlock_irqrestore(&dev->lock, flags);
+		return 0;
+	}
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	snd_printd(KERN_ERR LOGNAME ": Disable IRQ failed\n");
+
+	return -EIO;
+}
+EXPORT_SYMBOL(snd_msnd_disable_irq);
+
+static inline long get_play_delay_jiffies(struct snd_msnd *chip, long size)
+{
+	long tmp = (size * HZ * chip->play_sample_size) / 8;
+	return tmp / (chip->play_sample_rate * chip->play_channels);
+}
+
+static void snd_msnd_dsp_write_flush(struct snd_msnd *chip)
+{
+	if (!(chip->mode & FMODE_WRITE) || !test_bit(F_WRITING, &chip->flags))
+		return;
+	set_bit(F_WRITEFLUSH, &chip->flags);
+/*	interruptible_sleep_on_timeout(
+		&chip->writeflush,
+		get_play_delay_jiffies(&chip, chip->DAPF.len));*/
+	clear_bit(F_WRITEFLUSH, &chip->flags);
+	if (!signal_pending(current))
+		schedule_timeout_interruptible(
+			get_play_delay_jiffies(chip, chip->play_period_bytes));
+	clear_bit(F_WRITING, &chip->flags);
+}
+
+void snd_msnd_dsp_halt(struct snd_msnd *chip, struct file *file)
+{
+	if ((file ? file->f_mode : chip->mode) & FMODE_READ) {
+		clear_bit(F_READING, &chip->flags);
+		snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_STOP);
+		snd_msnd_disable_irq(chip);
+		if (file) {
+			snd_printd(KERN_INFO LOGNAME
+				   ": Stopping read for %p\n", file);
+			chip->mode &= ~FMODE_READ;
+		}
+		clear_bit(F_AUDIO_READ_INUSE, &chip->flags);
+	}
+	if ((file ? file->f_mode : chip->mode) & FMODE_WRITE) {
+		if (test_bit(F_WRITING, &chip->flags)) {
+			snd_msnd_dsp_write_flush(chip);
+			snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_STOP);
+		}
+		snd_msnd_disable_irq(chip);
+		if (file) {
+			snd_printd(KERN_INFO
+				   LOGNAME ": Stopping write for %p\n", file);
+			chip->mode &= ~FMODE_WRITE;
+		}
+		clear_bit(F_AUDIO_WRITE_INUSE, &chip->flags);
+	}
+}
+EXPORT_SYMBOL(snd_msnd_dsp_halt);
+
+
+int snd_msnd_DARQ(struct snd_msnd *chip, int bank)
+{
+	int /*size, n,*/ timeout = 3;
+	u16 wTmp;
+	/* void *DAQD; */
+
+	/* Increment the tail and check for queue wrap */
+	wTmp = readw(chip->DARQ + JQS_wTail) + PCTODSP_OFFSET(DAQDS__size);
+	if (wTmp > readw(chip->DARQ + JQS_wSize))
+		wTmp = 0;
+	while (wTmp == readw(chip->DARQ + JQS_wHead) && timeout--)
+		udelay(1);
+
+	if (chip->capturePeriods == 2) {
+		void *pDAQ = chip->mappedbase + DARQ_DATA_BUFF +
+			     bank * DAQDS__size + DAQDS_wStart;
+		unsigned short offset = 0x3000 + chip->capturePeriodBytes;
+
+		if (readw(pDAQ) != PCTODSP_BASED(0x3000))
+			offset = 0x3000;
+		writew(PCTODSP_BASED(offset), pDAQ);
+	}
+
+	writew(wTmp, chip->DARQ + JQS_wTail);
+
+#if 0
+	/* Get our digital audio queue struct */
+	DAQD = bank * DAQDS__size + chip->mappedbase + DARQ_DATA_BUFF;
+
+	/* Get length of data */
+	size = readw(DAQD + DAQDS_wSize);
+
+	/* Read data from the head (unprotected bank 1 access okay
+	   since this is only called inside an interrupt) */
+	outb(HPBLKSEL_1, chip->io + HP_BLKS);
+	n = msnd_fifo_write(&chip->DARF,
+			    (char *)(chip->base + bank * DAR_BUFF_SIZE),
+			    size, 0);
+	if (n <= 0) {
+		outb(HPBLKSEL_0, chip->io + HP_BLKS);
+		return n;
+	}
+	outb(HPBLKSEL_0, chip->io + HP_BLKS);
+#endif
+
+	return 1;
+}
+EXPORT_SYMBOL(snd_msnd_DARQ);
+
+int snd_msnd_DAPQ(struct snd_msnd *chip, int start)
+{
+	u16	DAPQ_tail;
+	int	protect = start, nbanks = 0;
+	void	*DAQD;
+	static int play_banks_submitted;
+	/* unsigned long flags;
+	spin_lock_irqsave(&chip->lock, flags); not necessary */
+
+	DAPQ_tail = readw(chip->DAPQ + JQS_wTail);
+	while (DAPQ_tail != readw(chip->DAPQ + JQS_wHead) || start) {
+		int bank_num = DAPQ_tail / PCTODSP_OFFSET(DAQDS__size);
+
+		if (start) {
+			start = 0;
+			play_banks_submitted = 0;
+		}
+
+		/* Get our digital audio queue struct */
+		DAQD = bank_num * DAQDS__size + chip->mappedbase +
+			DAPQ_DATA_BUFF;
+
+		/* Write size of this bank */
+		writew(chip->play_period_bytes, DAQD + DAQDS_wSize);
+		if (play_banks_submitted < 3)
+			++play_banks_submitted;
+		else if (chip->playPeriods == 2) {
+			unsigned short offset = chip->play_period_bytes;
+
+			if (readw(DAQD + DAQDS_wStart) != PCTODSP_BASED(0x0))
+				offset = 0;
+
+			writew(PCTODSP_BASED(offset), DAQD + DAQDS_wStart);
+		}
+		++nbanks;
+
+		/* Then advance the tail */
+		/*
+		if (protect)
+			snd_printd(KERN_INFO "B %X %lX\n",
+				   bank_num, xtime.tv_usec);
+		*/
+
+		DAPQ_tail = (++bank_num % 3) * PCTODSP_OFFSET(DAQDS__size);
+		writew(DAPQ_tail, chip->DAPQ + JQS_wTail);
+		/* Tell the DSP to play the bank */
+		snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_START);
+		if (protect)
+			if (2 == bank_num)
+				break;
+	}
+	/*
+	if (protect)
+		snd_printd(KERN_INFO "%lX\n", xtime.tv_usec);
+	*/
+	/* spin_unlock_irqrestore(&chip->lock, flags); not necessary */
+	return nbanks;
+}
+EXPORT_SYMBOL(snd_msnd_DAPQ);
+
+static void snd_msnd_play_reset_queue(struct snd_msnd *chip,
+				      unsigned int pcm_periods,
+				      unsigned int pcm_count)
+{
+	int	n;
+	void	*pDAQ = chip->mappedbase + DAPQ_DATA_BUFF;
+
+	chip->last_playbank = -1;
+	chip->playLimit = pcm_count * (pcm_periods - 1);
+	chip->playPeriods = pcm_periods;
+	writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DAPQ + JQS_wHead);
+	writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DAPQ + JQS_wTail);
+
+	chip->play_period_bytes = pcm_count;
+
+	for (n = 0; n < pcm_periods; ++n, pDAQ += DAQDS__size) {
+		writew(PCTODSP_BASED((u32)(pcm_count * n)),
+			pDAQ + DAQDS_wStart);
+		writew(0, pDAQ + DAQDS_wSize);
+		writew(1, pDAQ + DAQDS_wFormat);
+		writew(chip->play_sample_size, pDAQ + DAQDS_wSampleSize);
+		writew(chip->play_channels, pDAQ + DAQDS_wChannels);
+		writew(chip->play_sample_rate, pDAQ + DAQDS_wSampleRate);
+		writew(HIMT_PLAY_DONE * 0x100 + n, pDAQ + DAQDS_wIntMsg);
+		writew(n, pDAQ + DAQDS_wFlags);
+	}
+}
+
+static void snd_msnd_capture_reset_queue(struct snd_msnd *chip,
+					 unsigned int pcm_periods,
+					 unsigned int pcm_count)
+{
+	int		n;
+	void		*pDAQ;
+	/* unsigned long	flags; */
+
+	/* snd_msnd_init_queue(chip->DARQ, DARQ_DATA_BUFF, DARQ_BUFF_SIZE); */
+
+	chip->last_recbank = 2;
+	chip->captureLimit = pcm_count * (pcm_periods - 1);
+	chip->capturePeriods = pcm_periods;
+	writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DARQ + JQS_wHead);
+	writew(PCTODSP_OFFSET(chip->last_recbank * DAQDS__size),
+		chip->DARQ + JQS_wTail);
+
+#if 0 /* Critical section: bank 1 access. this is how the OSS driver does it:*/
+	spin_lock_irqsave(&chip->lock, flags);
+	outb(HPBLKSEL_1, chip->io + HP_BLKS);
+	memset_io(chip->mappedbase, 0, DAR_BUFF_SIZE * 3);
+	outb(HPBLKSEL_0, chip->io + HP_BLKS);
+	spin_unlock_irqrestore(&chip->lock, flags);
+#endif
+
+	chip->capturePeriodBytes = pcm_count;
+	snd_printdd("snd_msnd_capture_reset_queue() %i\n", pcm_count);
+
+	pDAQ = chip->mappedbase + DARQ_DATA_BUFF;
+
+	for (n = 0; n < pcm_periods; ++n, pDAQ += DAQDS__size) {
+		u32 tmp = pcm_count * n;
+
+		writew(PCTODSP_BASED(tmp + 0x3000), pDAQ + DAQDS_wStart);
+		writew(pcm_count, pDAQ + DAQDS_wSize);
+		writew(1, pDAQ + DAQDS_wFormat);
+		writew(chip->capture_sample_size, pDAQ + DAQDS_wSampleSize);
+		writew(chip->capture_channels, pDAQ + DAQDS_wChannels);
+		writew(chip->capture_sample_rate, pDAQ + DAQDS_wSampleRate);
+		writew(HIMT_RECORD_DONE * 0x100 + n, pDAQ + DAQDS_wIntMsg);
+		writew(n, pDAQ + DAQDS_wFlags);
+	}
+}
+
+static struct snd_pcm_hardware snd_msnd_playback = {
+	.info =			SNDRV_PCM_INFO_MMAP |
+				SNDRV_PCM_INFO_INTERLEAVED |
+				SNDRV_PCM_INFO_MMAP_VALID,
+	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
+	.rates =		SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		8000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	0x3000,
+	.period_bytes_min =	0x40,
+	.period_bytes_max =	0x1800,
+	.periods_min =		2,
+	.periods_max =		3,
+	.fifo_size =		0,
+};
+
+static struct snd_pcm_hardware snd_msnd_capture = {
+	.info =			SNDRV_PCM_INFO_MMAP |
+				SNDRV_PCM_INFO_INTERLEAVED |
+				SNDRV_PCM_INFO_MMAP_VALID,
+	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
+	.rates =		SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		8000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	0x3000,
+	.period_bytes_min =	0x40,
+	.period_bytes_max =	0x1800,
+	.periods_min =		2,
+	.periods_max =		3,
+	.fifo_size =		0,
+};
+
+
+static int snd_msnd_playback_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+
+	set_bit(F_AUDIO_WRITE_INUSE, &chip->flags);
+	clear_bit(F_WRITING, &chip->flags);
+	snd_msnd_enable_irq(chip);
+
+	runtime->dma_area = chip->mappedbase;
+	runtime->dma_bytes = 0x3000;
+
+	chip->playback_substream = substream;
+	runtime->hw = snd_msnd_playback;
+	return 0;
+}
+
+static int snd_msnd_playback_close(struct snd_pcm_substream *substream)
+{
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+
+	snd_msnd_disable_irq(chip);
+	clear_bit(F_AUDIO_WRITE_INUSE, &chip->flags);
+	return 0;
+}
+
+
+static int snd_msnd_playback_hw_params(struct snd_pcm_substream *substream,
+					struct snd_pcm_hw_params *params)
+{
+	int	i;
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+	void	*pDAQ =	chip->mappedbase + DAPQ_DATA_BUFF;
+
+	chip->play_sample_size = snd_pcm_format_width(params_format(params));
+	chip->play_channels = params_channels(params);
+	chip->play_sample_rate = params_rate(params);
+
+	for (i = 0; i < 3; ++i, pDAQ += DAQDS__size) {
+		writew(chip->play_sample_size, pDAQ + DAQDS_wSampleSize);
+		writew(chip->play_channels, pDAQ + DAQDS_wChannels);
+		writew(chip->play_sample_rate, pDAQ + DAQDS_wSampleRate);
+	}
+	/* dont do this here:
+	 * snd_msnd_calibrate_adc(chip->play_sample_rate);
+	 */
+
+	return 0;
+}
+
+static int snd_msnd_playback_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+	unsigned int pcm_size = snd_pcm_lib_buffer_bytes(substream);
+	unsigned int pcm_count = snd_pcm_lib_period_bytes(substream);
+	unsigned int pcm_periods = pcm_size / pcm_count;
+
+	snd_msnd_play_reset_queue(chip, pcm_periods, pcm_count);
+	chip->playDMAPos = 0;
+	return 0;
+}
+
+static int snd_msnd_playback_trigger(struct snd_pcm_substream *substream,
+				     int cmd)
+{
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+	int	result = 0;
+
+	if (cmd == SNDRV_PCM_TRIGGER_START) {
+		snd_printdd("snd_msnd_playback_trigger(START)\n");
+		chip->banksPlayed = 0;
+		set_bit(F_WRITING, &chip->flags);
+		snd_msnd_DAPQ(chip, 1);
+	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+		snd_printdd("snd_msnd_playback_trigger(STop)\n");
+		/* interrupt diagnostic, comment this out later */
+		clear_bit(F_WRITING, &chip->flags);
+		snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_STOP);
+	} else {
+		snd_printd(KERN_ERR "snd_msnd_playback_trigger(?????)\n");
+		result = -EINVAL;
+	}
+
+	snd_printdd("snd_msnd_playback_trigger() ENDE\n");
+	return result;
+}
+
+static snd_pcm_uframes_t
+snd_msnd_playback_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+
+	return bytes_to_frames(substream->runtime, chip->playDMAPos);
+}
+
+
+static struct snd_pcm_ops snd_msnd_playback_ops = {
+	.open =		snd_msnd_playback_open,
+	.close =	snd_msnd_playback_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_msnd_playback_hw_params,
+	.prepare =	snd_msnd_playback_prepare,
+	.trigger =	snd_msnd_playback_trigger,
+	.pointer =	snd_msnd_playback_pointer,
+};
+
+static int snd_msnd_capture_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+
+	set_bit(F_AUDIO_READ_INUSE, &chip->flags);
+	snd_msnd_enable_irq(chip);
+	runtime->dma_area = chip->mappedbase + 0x3000;
+	runtime->dma_bytes = 0x3000;
+	memset(runtime->dma_area, 0, runtime->dma_bytes);
+	chip->capture_substream = substream;
+	runtime->hw = snd_msnd_capture;
+	return 0;
+}
+
+static int snd_msnd_capture_close(struct snd_pcm_substream *substream)
+{
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+
+	snd_msnd_disable_irq(chip);
+	clear_bit(F_AUDIO_READ_INUSE, &chip->flags);
+	return 0;
+}
+
+static int snd_msnd_capture_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+	unsigned int pcm_size = snd_pcm_lib_buffer_bytes(substream);
+	unsigned int pcm_count = snd_pcm_lib_period_bytes(substream);
+	unsigned int pcm_periods = pcm_size / pcm_count;
+
+	snd_msnd_capture_reset_queue(chip, pcm_periods, pcm_count);
+	chip->captureDMAPos = 0;
+	return 0;
+}
+
+static int snd_msnd_capture_trigger(struct snd_pcm_substream *substream,
+				    int cmd)
+{
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+
+	if (cmd == SNDRV_PCM_TRIGGER_START) {
+		chip->last_recbank = -1;
+		set_bit(F_READING, &chip->flags);
+		if (snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_START) == 0)
+			return 0;
+
+		clear_bit(F_READING, &chip->flags);
+	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+		clear_bit(F_READING, &chip->flags);
+		snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_STOP);
+		return 0;
+	}
+	return -EINVAL;
+}
+
+
+static snd_pcm_uframes_t
+snd_msnd_capture_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+
+	return bytes_to_frames(runtime, chip->captureDMAPos);
+}
+
+
+static int snd_msnd_capture_hw_params(struct snd_pcm_substream *substream,
+					struct snd_pcm_hw_params *params)
+{
+	int		i;
+	struct snd_msnd *chip = snd_pcm_substream_chip(substream);
+	void		*pDAQ = chip->mappedbase + DARQ_DATA_BUFF;
+
+	chip->capture_sample_size = snd_pcm_format_width(params_format(params));
+	chip->capture_channels = params_channels(params);
+	chip->capture_sample_rate = params_rate(params);
+
+	for (i = 0; i < 3; ++i, pDAQ += DAQDS__size) {
+		writew(chip->capture_sample_size, pDAQ + DAQDS_wSampleSize);
+		writew(chip->capture_channels, pDAQ + DAQDS_wChannels);
+		writew(chip->capture_sample_rate, pDAQ + DAQDS_wSampleRate);
+	}
+	return 0;
+}
+
+
+static struct snd_pcm_ops snd_msnd_capture_ops = {
+	.open =		snd_msnd_capture_open,
+	.close =	snd_msnd_capture_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_msnd_capture_hw_params,
+	.prepare =	snd_msnd_capture_prepare,
+	.trigger =	snd_msnd_capture_trigger,
+	.pointer =	snd_msnd_capture_pointer,
+};
+
+
+int snd_msnd_pcm(struct snd_card *card, int device,
+			struct snd_pcm **rpcm)
+{
+	struct snd_msnd *chip = card->private_data;
+	struct snd_pcm	*pcm;
+	int err;
+
+	err = snd_pcm_new(card, "MSNDPINNACLE", device, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_msnd_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_msnd_capture_ops);
+
+	pcm->private_data = chip;
+	strcpy(pcm->name, "Hurricane");
+
+
+	if (rpcm)
+		*rpcm = pcm;
+	return 0;
+}
+EXPORT_SYMBOL(snd_msnd_pcm);
+