ALSA: wss_lib: move cs4231_lib into wss_lib

Move the file sound/isa/cs423x/cs4231_lib.c
into sound/isa/cs423x/wss_lib.c
This is the first step toward merging all libraries
for Windows Sound System compatible chips
into a single library.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Reviewed-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

2 files changed, 0 insertions, 1947 deletions

diff --git a/sound/isa/cs423x/Makefile b/sound/isa/cs423x/Makefile
index 5067ee00193..5870ca21ab5 100644
--- a/sound/isa/cs423x/Makefile
+++ b/sound/isa/cs423x/Makefile
@@ -3,14 +3,12 @@
 # Copyright (c) 2001 by Jaroslav Kysela <perex@perex.cz>
 #
 
-snd-cs4231-lib-objs := cs4231_lib.o
 snd-cs4236-lib-objs := cs4236_lib.o
 snd-cs4231-objs := cs4231.o
 snd-cs4232-objs := cs4232.o
 snd-cs4236-objs := cs4236.o
 
 # Toplevel Module Dependency
-obj-$(CONFIG_SND_CS4231_LIB) += snd-cs4231-lib.o
 obj-$(CONFIG_SND_CS4231) += snd-cs4231.o
 obj-$(CONFIG_SND_CS4232) += snd-cs4232.o
 obj-$(CONFIG_SND_CS4236) += snd-cs4236.o snd-cs4236-lib.o
diff --git a/sound/isa/cs423x/cs4231_lib.c b/sound/isa/cs423x/cs4231_lib.c
deleted file mode 100644
index 521db705d17..00000000000
--- a/sound/isa/cs423x/cs4231_lib.c
+++ /dev/null
@@ -1,1945 +0,0 @@
-/*
- *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
- *  Routines for control of CS4231(A)/CS4232/InterWave & compatible chips
- *
- *  Bugs:
- *     - sometimes record brokes playback with WSS portion of 
- *       Yamaha OPL3-SA3 chip
- *     - CS4231 (GUS MAX) - still trouble with occasional noises
- *                        - broken initialization?
- *
- *   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- *
- */
-
-#include <linux/delay.h>
-#include <linux/pm.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <sound/core.h>
-#include <sound/cs4231.h>
-#include <sound/pcm_params.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/irq.h>
-
-MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
-MODULE_DESCRIPTION("Routines for control of CS4231(A)/CS4232/InterWave & compatible chips");
-MODULE_LICENSE("GPL");
-
-#if 0
-#define SNDRV_DEBUG_MCE
-#endif
-
-/*
- *  Some variables
- */
-
-static unsigned char freq_bits[14] = {
-	/* 5510 */	0x00 | CS4231_XTAL2,
-	/* 6620 */	0x0E | CS4231_XTAL2,
-	/* 8000 */	0x00 | CS4231_XTAL1,
-	/* 9600 */	0x0E | CS4231_XTAL1,
-	/* 11025 */	0x02 | CS4231_XTAL2,
-	/* 16000 */	0x02 | CS4231_XTAL1,
-	/* 18900 */	0x04 | CS4231_XTAL2,
-	/* 22050 */	0x06 | CS4231_XTAL2,
-	/* 27042 */	0x04 | CS4231_XTAL1,
-	/* 32000 */	0x06 | CS4231_XTAL1,
-	/* 33075 */	0x0C | CS4231_XTAL2,
-	/* 37800 */	0x08 | CS4231_XTAL2,
-	/* 44100 */	0x0A | CS4231_XTAL2,
-	/* 48000 */	0x0C | CS4231_XTAL1
-};
-
-static unsigned int rates[14] = {
-	5510, 6620, 8000, 9600, 11025, 16000, 18900, 22050,
-	27042, 32000, 33075, 37800, 44100, 48000
-};
-
-static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
-	.count = ARRAY_SIZE(rates),
-	.list = rates,
-	.mask = 0,
-};
-
-static int snd_cs4231_xrate(struct snd_pcm_runtime *runtime)
-{
-	return snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates);
-}
-
-static unsigned char snd_cs4231_original_image[32] =
-{
-	0x00,			/* 00/00 - lic */
-	0x00,			/* 01/01 - ric */
-	0x9f,			/* 02/02 - la1ic */
-	0x9f,			/* 03/03 - ra1ic */
-	0x9f,			/* 04/04 - la2ic */
-	0x9f,			/* 05/05 - ra2ic */
-	0xbf,			/* 06/06 - loc */
-	0xbf,			/* 07/07 - roc */
-	0x20,			/* 08/08 - pdfr */
-	CS4231_AUTOCALIB,	/* 09/09 - ic */
-	0x00,			/* 0a/10 - pc */
-	0x00,			/* 0b/11 - ti */
-	CS4231_MODE2,		/* 0c/12 - mi */
-	0xfc,			/* 0d/13 - lbc */
-	0x00,			/* 0e/14 - pbru */
-	0x00,			/* 0f/15 - pbrl */
-	0x80,			/* 10/16 - afei */
-	0x01,			/* 11/17 - afeii */
-	0x9f,			/* 12/18 - llic */
-	0x9f,			/* 13/19 - rlic */
-	0x00,			/* 14/20 - tlb */
-	0x00,			/* 15/21 - thb */
-	0x00,			/* 16/22 - la3mic/reserved */
-	0x00,			/* 17/23 - ra3mic/reserved */
-	0x00,			/* 18/24 - afs */
-	0x00,			/* 19/25 - lamoc/version */
-	0xcf,			/* 1a/26 - mioc */
-	0x00,			/* 1b/27 - ramoc/reserved */
-	0x20,			/* 1c/28 - cdfr */
-	0x00,			/* 1d/29 - res4 */
-	0x00,			/* 1e/30 - cbru */
-	0x00,			/* 1f/31 - cbrl */
-};
-
-static unsigned char snd_opti93x_original_image[32] =
-{
-	0x00,		/* 00/00 - l_mixout_outctrl */
-	0x00,		/* 01/01 - r_mixout_outctrl */
-	0x88,		/* 02/02 - l_cd_inctrl */
-	0x88,		/* 03/03 - r_cd_inctrl */
-	0x88,		/* 04/04 - l_a1/fm_inctrl */
-	0x88,		/* 05/05 - r_a1/fm_inctrl */
-	0x80,		/* 06/06 - l_dac_inctrl */
-	0x80,		/* 07/07 - r_dac_inctrl */
-	0x00,		/* 08/08 - ply_dataform_reg */
-	0x00,		/* 09/09 - if_conf */
-	0x00,		/* 0a/10 - pin_ctrl */
-	0x00,		/* 0b/11 - err_init_reg */
-	0x0a,		/* 0c/12 - id_reg */
-	0x00,		/* 0d/13 - reserved */
-	0x00,		/* 0e/14 - ply_upcount_reg */
-	0x00,		/* 0f/15 - ply_lowcount_reg */
-	0x88,		/* 10/16 - reserved/l_a1_inctrl */
-	0x88,		/* 11/17 - reserved/r_a1_inctrl */
-	0x88,		/* 12/18 - l_line_inctrl */
-	0x88,		/* 13/19 - r_line_inctrl */
-	0x88,		/* 14/20 - l_mic_inctrl */
-	0x88,		/* 15/21 - r_mic_inctrl */
-	0x80,		/* 16/22 - l_out_outctrl */
-	0x80,		/* 17/23 - r_out_outctrl */
-	0x00,		/* 18/24 - reserved */
-	0x00,		/* 19/25 - reserved */
-	0x00,		/* 1a/26 - reserved */
-	0x00,		/* 1b/27 - reserved */
-	0x00,		/* 1c/28 - cap_dataform_reg */
-	0x00,		/* 1d/29 - reserved */
-	0x00,		/* 1e/30 - cap_upcount_reg */
-	0x00		/* 1f/31 - cap_lowcount_reg */
-};
-
-/*
- *  Basic I/O functions
- */
-
-static inline void cs4231_outb(struct snd_cs4231 *chip, u8 offset, u8 val)
-{
-	outb(val, chip->port + offset);
-}
-
-static inline u8 cs4231_inb(struct snd_cs4231 *chip, u8 offset)
-{
-	return inb(chip->port + offset);
-}
-
-static void snd_cs4231_wait(struct snd_cs4231 *chip)
-{
-	int timeout;
-
-	for (timeout = 250;
-	     timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
-	     timeout--)
-	     	udelay(100);
-}
-
-static void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
-			    unsigned char mask, unsigned char value)
-{
-	unsigned char tmp = (chip->image[reg] & mask) | value;
-
-	snd_cs4231_wait(chip);
-#ifdef CONFIG_SND_DEBUG
-	if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
-		snd_printk("outm: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
-#endif
-	chip->image[reg] = tmp;
-	if (!chip->calibrate_mute) {
-		cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
-		wmb();
-		cs4231_outb(chip, CS4231P(REG), tmp);
-		mb();
-	}
-}
-
-static void snd_cs4231_dout(struct snd_cs4231 *chip, unsigned char reg, unsigned char value)
-{
-	int timeout;
-
-	for (timeout = 250;
-	     timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
-	     timeout--)
-	     	udelay(10);
-	cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
-	cs4231_outb(chip, CS4231P(REG), value);
-	mb();
-}
-
-void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg, unsigned char value)
-{
-	snd_cs4231_wait(chip);
-#ifdef CONFIG_SND_DEBUG
-	if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
-		snd_printk("out: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
-#endif
-	cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
-	cs4231_outb(chip, CS4231P(REG), value);
-	chip->image[reg] = value;
-	mb();
-	snd_printdd("codec out - reg 0x%x = 0x%x\n",
-			chip->mce_bit | reg, value);
-}
-
-unsigned char snd_cs4231_in(struct snd_cs4231 *chip, unsigned char reg)
-{
-	snd_cs4231_wait(chip);
-#ifdef CONFIG_SND_DEBUG
-	if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
-		snd_printk("in: auto calibration time out - reg = 0x%x\n", reg);
-#endif
-	cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
-	mb();
-	return cs4231_inb(chip, CS4231P(REG));
-}
-
-void snd_cs4236_ext_out(struct snd_cs4231 *chip, unsigned char reg, unsigned char val)
-{
-	cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | 0x17);
-	cs4231_outb(chip, CS4231P(REG), reg | (chip->image[CS4236_EXT_REG] & 0x01));
-	cs4231_outb(chip, CS4231P(REG), val);
-	chip->eimage[CS4236_REG(reg)] = val;
-#if 0
-	printk("ext out : reg = 0x%x, val = 0x%x\n", reg, val);
-#endif
-}
-
-unsigned char snd_cs4236_ext_in(struct snd_cs4231 *chip, unsigned char reg)
-{
-	cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | 0x17);
-	cs4231_outb(chip, CS4231P(REG), reg | (chip->image[CS4236_EXT_REG] & 0x01));
-#if 1
-	return cs4231_inb(chip, CS4231P(REG));
-#else
-	{
-		unsigned char res;
-		res = cs4231_inb(chip, CS4231P(REG));
-		printk("ext in : reg = 0x%x, val = 0x%x\n", reg, res);
-		return res;
-	}
-#endif
-}
-
-#if 0
-
-static void snd_cs4231_debug(struct snd_cs4231 *chip)
-{
-	printk("CS4231 REGS:      INDEX = 0x%02x  ", cs4231_inb(chip, CS4231P(REGSEL)));
-	printk("                 STATUS = 0x%02x\n", cs4231_inb(chip, CS4231P(STATUS)));
-	printk("  0x00: left input      = 0x%02x  ", snd_cs4231_in(chip, 0x00));
-	printk("  0x10: alt 1 (CFIG 2)  = 0x%02x\n", snd_cs4231_in(chip, 0x10));
-	printk("  0x01: right input     = 0x%02x  ", snd_cs4231_in(chip, 0x01));
-	printk("  0x11: alt 2 (CFIG 3)  = 0x%02x\n", snd_cs4231_in(chip, 0x11));
-	printk("  0x02: GF1 left input  = 0x%02x  ", snd_cs4231_in(chip, 0x02));
-	printk("  0x12: left line in    = 0x%02x\n", snd_cs4231_in(chip, 0x12));
-	printk("  0x03: GF1 right input = 0x%02x  ", snd_cs4231_in(chip, 0x03));
-	printk("  0x13: right line in   = 0x%02x\n", snd_cs4231_in(chip, 0x13));
-	printk("  0x04: CD left input   = 0x%02x  ", snd_cs4231_in(chip, 0x04));
-	printk("  0x14: timer low       = 0x%02x\n", snd_cs4231_in(chip, 0x14));
-	printk("  0x05: CD right input  = 0x%02x  ", snd_cs4231_in(chip, 0x05));
-	printk("  0x15: timer high      = 0x%02x\n", snd_cs4231_in(chip, 0x15));
-	printk("  0x06: left output     = 0x%02x  ", snd_cs4231_in(chip, 0x06));
-	printk("  0x16: left MIC (PnP)  = 0x%02x\n", snd_cs4231_in(chip, 0x16));
-	printk("  0x07: right output    = 0x%02x  ", snd_cs4231_in(chip, 0x07));
-	printk("  0x17: right MIC (PnP) = 0x%02x\n", snd_cs4231_in(chip, 0x17));
-	printk("  0x08: playback format = 0x%02x  ", snd_cs4231_in(chip, 0x08));
-	printk("  0x18: IRQ status      = 0x%02x\n", snd_cs4231_in(chip, 0x18));
-	printk("  0x09: iface (CFIG 1)  = 0x%02x  ", snd_cs4231_in(chip, 0x09));
-	printk("  0x19: left line out   = 0x%02x\n", snd_cs4231_in(chip, 0x19));
-	printk("  0x0a: pin control     = 0x%02x  ", snd_cs4231_in(chip, 0x0a));
-	printk("  0x1a: mono control    = 0x%02x\n", snd_cs4231_in(chip, 0x1a));
-	printk("  0x0b: init & status   = 0x%02x  ", snd_cs4231_in(chip, 0x0b));
-	printk("  0x1b: right line out  = 0x%02x\n", snd_cs4231_in(chip, 0x1b));
-	printk("  0x0c: revision & mode = 0x%02x  ", snd_cs4231_in(chip, 0x0c));
-	printk("  0x1c: record format   = 0x%02x\n", snd_cs4231_in(chip, 0x1c));
-	printk("  0x0d: loopback        = 0x%02x  ", snd_cs4231_in(chip, 0x0d));
-	printk("  0x1d: var freq (PnP)  = 0x%02x\n", snd_cs4231_in(chip, 0x1d));
-	printk("  0x0e: ply upr count   = 0x%02x  ", snd_cs4231_in(chip, 0x0e));
-	printk("  0x1e: ply lwr count   = 0x%02x\n", snd_cs4231_in(chip, 0x1e));
-	printk("  0x0f: rec upr count   = 0x%02x  ", snd_cs4231_in(chip, 0x0f));
-	printk("  0x1f: rec lwr count   = 0x%02x\n", snd_cs4231_in(chip, 0x1f));
-}
-
-#endif
-
-/*
- *  CS4231 detection / MCE routines
- */
-
-static void snd_cs4231_busy_wait(struct snd_cs4231 *chip)
-{
-	int timeout;
-
-	/* huh.. looks like this sequence is proper for CS4231A chip (GUS MAX) */
-	for (timeout = 5; timeout > 0; timeout--)
-		cs4231_inb(chip, CS4231P(REGSEL));
-	/* end of cleanup sequence */
-	for (timeout = 250;
-	     timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
-	     timeout--)
-	     	udelay(10);
-}
-
-void snd_cs4231_mce_up(struct snd_cs4231 *chip)
-{
-	unsigned long flags;
-	int timeout;
-
-	snd_cs4231_wait(chip);
-#ifdef CONFIG_SND_DEBUG
-	if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
-		snd_printk("mce_up - auto calibration time out (0)\n");
-#endif
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	chip->mce_bit |= CS4231_MCE;
-	timeout = cs4231_inb(chip, CS4231P(REGSEL));
-	if (timeout == 0x80)
-		snd_printk("mce_up [0x%lx]: serious init problem - codec still busy\n", chip->port);
-	if (!(timeout & CS4231_MCE))
-		cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | (timeout & 0x1f));
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-}
-
-void snd_cs4231_mce_down(struct snd_cs4231 *chip)
-{
-	unsigned long flags;
-	unsigned long end_time;
-	int timeout;
-
-	snd_cs4231_busy_wait(chip);
-
-#ifdef CONFIG_SND_DEBUG
-	if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
-		snd_printk("mce_down [0x%lx] - auto calibration time out (0)\n", (long)CS4231P(REGSEL));
-#endif
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	chip->mce_bit &= ~CS4231_MCE;
-	timeout = cs4231_inb(chip, CS4231P(REGSEL));
-	cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | (timeout & 0x1f));
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	if (timeout == 0x80)
-		snd_printk("mce_down [0x%lx]: serious init problem - codec still busy\n", chip->port);
-	if ((timeout & CS4231_MCE) == 0 ||
-	    !(chip->hardware & (CS4231_HW_CS4231_MASK | CS4231_HW_CS4232_MASK))) {
-		return;
-	}
-
-	/*
-	 * Wait for (possible -- during init auto-calibration may not be set)
-	 * calibration process to start. Needs upto 5 sample periods on AD1848
-	 * which at the slowest possible rate of 5.5125 kHz means 907 us.
-	 */
-	msleep(1);
-
-	snd_printdd("(1) jiffies = %lu\n", jiffies);
-
-	/* check condition up to 250 ms */
-	end_time = jiffies + msecs_to_jiffies(250);
-	while (snd_cs4231_in(chip, CS4231_TEST_INIT) &
-		CS4231_CALIB_IN_PROGRESS) {
-
-		if (time_after(jiffies, end_time)) {
-			snd_printk(KERN_ERR "mce_down - "
-					"auto calibration time out (2)\n");
-			return;
-		}
-		msleep(1);
-	}
-
-	snd_printdd("(2) jiffies = %lu\n", jiffies);
-
-	/* check condition up to 100 ms */
-	end_time = jiffies + msecs_to_jiffies(100);
-	while (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT) {
-		if (time_after(jiffies, end_time)) {
-			snd_printk(KERN_ERR "mce_down - auto calibration time out (3)\n");
-			return;
-		}
-		msleep(1);
-	}
-
-	snd_printdd("(3) jiffies = %lu\n", jiffies);
-	snd_printd("mce_down - exit = 0x%x\n", cs4231_inb(chip, CS4231P(REGSEL)));
-}
-
-static unsigned int snd_cs4231_get_count(unsigned char format, unsigned int size)
-{
-	switch (format & 0xe0) {
-	case CS4231_LINEAR_16:
-	case CS4231_LINEAR_16_BIG:
-		size >>= 1;
-		break;
-	case CS4231_ADPCM_16:
-		return size >> 2;
-	}
-	if (format & CS4231_STEREO)
-		size >>= 1;
-	return size;
-}
-
-static int snd_cs4231_trigger(struct snd_pcm_substream *substream,
-			      int cmd)
-{
-	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
-	int result = 0;
-	unsigned int what;
-	struct snd_pcm_substream *s;
-	int do_start;
-
-#if 0
-	printk("codec trigger!!! - what = %i, enable = %i, status = 0x%x\n", what, enable, cs4231_inb(chip, CS4231P(STATUS)));
-#endif
-
-	switch (cmd) {
-	case SNDRV_PCM_TRIGGER_START:
-	case SNDRV_PCM_TRIGGER_RESUME:
-		do_start = 1; break;
-	case SNDRV_PCM_TRIGGER_STOP:
-	case SNDRV_PCM_TRIGGER_SUSPEND:
-		do_start = 0; break;
-	default:
-		return -EINVAL;
-	}
-
-	what = 0;
-	snd_pcm_group_for_each_entry(s, substream) {
-		if (s == chip->playback_substream) {
-			what |= CS4231_PLAYBACK_ENABLE;
-			snd_pcm_trigger_done(s, substream);
-		} else if (s == chip->capture_substream) {
-			what |= CS4231_RECORD_ENABLE;
-			snd_pcm_trigger_done(s, substream);
-		}
-	}
-	spin_lock(&chip->reg_lock);
-	if (do_start) {
-		chip->image[CS4231_IFACE_CTRL] |= what;
-		if (chip->trigger)
-			chip->trigger(chip, what, 1);
-	} else {
-		chip->image[CS4231_IFACE_CTRL] &= ~what;
-		if (chip->trigger)
-			chip->trigger(chip, what, 0);
-	}
-	snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
-	spin_unlock(&chip->reg_lock);
-#if 0
-	snd_cs4231_debug(chip);
-#endif
-	return result;
-}
-
-/*
- *  CODEC I/O
- */
-
-static unsigned char snd_cs4231_get_rate(unsigned int rate)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(rates); i++)
-		if (rate == rates[i])
-			return freq_bits[i];
-	// snd_BUG();
-	return freq_bits[ARRAY_SIZE(rates) - 1];
-}
-
-static unsigned char snd_cs4231_get_format(struct snd_cs4231 *chip,
-				           int format,
-                                           int channels)
-{
-	unsigned char rformat;
-
-	rformat = CS4231_LINEAR_8;
-	switch (format) {
-	case SNDRV_PCM_FORMAT_MU_LAW:	rformat = CS4231_ULAW_8; break;
-	case SNDRV_PCM_FORMAT_A_LAW:	rformat = CS4231_ALAW_8; break;
-	case SNDRV_PCM_FORMAT_S16_LE:	rformat = CS4231_LINEAR_16; break;
-	case SNDRV_PCM_FORMAT_S16_BE:	rformat = CS4231_LINEAR_16_BIG; break;
-	case SNDRV_PCM_FORMAT_IMA_ADPCM:	rformat = CS4231_ADPCM_16; break;
-	}
-	if (channels > 1)
-		rformat |= CS4231_STEREO;
-#if 0
-	snd_printk("get_format: 0x%x (mode=0x%x)\n", format, mode);
-#endif
-	return rformat;
-}
-
-static void snd_cs4231_calibrate_mute(struct snd_cs4231 *chip, int mute)
-{
-	unsigned long flags;
-
-	mute = mute ? 1 : 0;
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	if (chip->calibrate_mute == mute) {
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
-		return;
-	}
-	if (!mute) {
-		snd_cs4231_dout(chip, CS4231_LEFT_INPUT, chip->image[CS4231_LEFT_INPUT]);
-		snd_cs4231_dout(chip, CS4231_RIGHT_INPUT, chip->image[CS4231_RIGHT_INPUT]);
-		snd_cs4231_dout(chip, CS4231_LOOPBACK, chip->image[CS4231_LOOPBACK]);
-	}
-	snd_cs4231_dout(chip, CS4231_AUX1_LEFT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX1_LEFT_INPUT]);
-	snd_cs4231_dout(chip, CS4231_AUX1_RIGHT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX1_RIGHT_INPUT]);
-	snd_cs4231_dout(chip, CS4231_AUX2_LEFT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX2_LEFT_INPUT]);
-	snd_cs4231_dout(chip, CS4231_AUX2_RIGHT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX2_RIGHT_INPUT]);
-	snd_cs4231_dout(chip, CS4231_LEFT_OUTPUT, mute ? 0x80 : chip->image[CS4231_LEFT_OUTPUT]);
-	snd_cs4231_dout(chip, CS4231_RIGHT_OUTPUT, mute ? 0x80 : chip->image[CS4231_RIGHT_OUTPUT]);
-	snd_cs4231_dout(chip, CS4231_LEFT_LINE_IN, mute ? 0x80 : chip->image[CS4231_LEFT_LINE_IN]);
-	snd_cs4231_dout(chip, CS4231_RIGHT_LINE_IN, mute ? 0x80 : chip->image[CS4231_RIGHT_LINE_IN]);
-	snd_cs4231_dout(chip, CS4231_MONO_CTRL, mute ? 0xc0 : chip->image[CS4231_MONO_CTRL]);
-	if (chip->hardware == CS4231_HW_INTERWAVE) {
-		snd_cs4231_dout(chip, CS4231_LEFT_MIC_INPUT, mute ? 0x80 : chip->image[CS4231_LEFT_MIC_INPUT]);
-		snd_cs4231_dout(chip, CS4231_RIGHT_MIC_INPUT, mute ? 0x80 : chip->image[CS4231_RIGHT_MIC_INPUT]);		
-		snd_cs4231_dout(chip, CS4231_LINE_LEFT_OUTPUT, mute ? 0x80 : chip->image[CS4231_LINE_LEFT_OUTPUT]);
-		snd_cs4231_dout(chip, CS4231_LINE_RIGHT_OUTPUT, mute ? 0x80 : chip->image[CS4231_LINE_RIGHT_OUTPUT]);
-	}
-	chip->calibrate_mute = mute;
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-}
-
-static void snd_cs4231_playback_format(struct snd_cs4231 *chip,
-				       struct snd_pcm_hw_params *params,
-				       unsigned char pdfr)
-{
-	unsigned long flags;
-	int full_calib = 1;
-
-	mutex_lock(&chip->mce_mutex);
-	snd_cs4231_calibrate_mute(chip, 1);
-	if (chip->hardware == CS4231_HW_CS4231A ||
-	    (chip->hardware & CS4231_HW_CS4232_MASK)) {
-		spin_lock_irqsave(&chip->reg_lock, flags);
-		if ((chip->image[CS4231_PLAYBK_FORMAT] & 0x0f) == (pdfr & 0x0f)) {	/* rate is same? */
-			snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | 0x10);
-			snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT] = pdfr);
-			snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] &= ~0x10);
-			udelay(100); /* Fixes audible clicks at least on GUS MAX */
-			full_calib = 0;
-		}
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
-	}
-	if (full_calib) {
-		snd_cs4231_mce_up(chip);
-		spin_lock_irqsave(&chip->reg_lock, flags);
-		if (chip->hardware != CS4231_HW_INTERWAVE && !chip->single_dma) {
-			snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
-					(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) ?
-					(pdfr & 0xf0) | (chip->image[CS4231_REC_FORMAT] & 0x0f) :
-				        pdfr);
-		} else {
-			snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT] = pdfr);
-		}
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
-		if (chip->hardware == CS4231_HW_OPL3SA2)
-			udelay(100);	/* this seems to help */
-		snd_cs4231_mce_down(chip);
-	}
-	snd_cs4231_calibrate_mute(chip, 0);
-	mutex_unlock(&chip->mce_mutex);
-}
-
-static void snd_cs4231_capture_format(struct snd_cs4231 *chip,
-				      struct snd_pcm_hw_params *params,
-                                      unsigned char cdfr)
-{
-	unsigned long flags;
-	int full_calib = 1;
-
-	mutex_lock(&chip->mce_mutex);
-	snd_cs4231_calibrate_mute(chip, 1);
-	if (chip->hardware == CS4231_HW_CS4231A ||
-	    (chip->hardware & CS4231_HW_CS4232_MASK)) {
-		spin_lock_irqsave(&chip->reg_lock, flags);
-		if ((chip->image[CS4231_PLAYBK_FORMAT] & 0x0f) == (cdfr & 0x0f) ||	/* rate is same? */
-		    (chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
-			snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | 0x20);
-			snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT] = cdfr);
-			snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] &= ~0x20);
-			full_calib = 0;
-		}
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
-	}
-	if (full_calib) {
-		snd_cs4231_mce_up(chip);
-		spin_lock_irqsave(&chip->reg_lock, flags);
-		if (chip->hardware != CS4231_HW_INTERWAVE) {
-			if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
-				snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
-					       ((chip->single_dma ? cdfr : chip->image[CS4231_PLAYBK_FORMAT]) & 0xf0) |
-					       (cdfr & 0x0f));
-				spin_unlock_irqrestore(&chip->reg_lock, flags);
-				snd_cs4231_mce_down(chip);
-				snd_cs4231_mce_up(chip);
-				spin_lock_irqsave(&chip->reg_lock, flags);
-			}
-		}
-		snd_cs4231_out(chip, CS4231_REC_FORMAT, cdfr);
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
-		snd_cs4231_mce_down(chip);
-	}
-	snd_cs4231_calibrate_mute(chip, 0);
-	mutex_unlock(&chip->mce_mutex);
-}
-
-/*
- *  Timer interface
- */
-
-static unsigned long snd_cs4231_timer_resolution(struct snd_timer * timer)
-{
-	struct snd_cs4231 *chip = snd_timer_chip(timer);
-	if (chip->hardware & CS4231_HW_CS4236B_MASK)
-		return 14467;
-	else
-		return chip->image[CS4231_PLAYBK_FORMAT] & 1 ? 9969 : 9920;
-}
-
-static int snd_cs4231_timer_start(struct snd_timer * timer)
-{
-	unsigned long flags;
-	unsigned int ticks;
-	struct snd_cs4231 *chip = snd_timer_chip(timer);
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	ticks = timer->sticks;
-	if ((chip->image[CS4231_ALT_FEATURE_1] & CS4231_TIMER_ENABLE) == 0 ||
-	    (unsigned char)(ticks >> 8) != chip->image[CS4231_TIMER_HIGH] ||
-	    (unsigned char)ticks != chip->image[CS4231_TIMER_LOW]) {
-		snd_cs4231_out(chip, CS4231_TIMER_HIGH, chip->image[CS4231_TIMER_HIGH] = (unsigned char) (ticks >> 8));
-		snd_cs4231_out(chip, CS4231_TIMER_LOW, chip->image[CS4231_TIMER_LOW] = (unsigned char) ticks);
-		snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | CS4231_TIMER_ENABLE);
-	}
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	return 0;
-}
-
-static int snd_cs4231_timer_stop(struct snd_timer * timer)
-{
-	unsigned long flags;
-	struct snd_cs4231 *chip = snd_timer_chip(timer);
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] &= ~CS4231_TIMER_ENABLE);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	return 0;
-}
-
-static void snd_cs4231_init(struct snd_cs4231 *chip)
-{
-	unsigned long flags;
-
-	snd_cs4231_mce_down(chip);
-
-#ifdef SNDRV_DEBUG_MCE
-	snd_printk("init: (1)\n");
-#endif
-	snd_cs4231_mce_up(chip);
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
-			     CS4231_RECORD_ENABLE | CS4231_RECORD_PIO |
-			     CS4231_CALIB_MODE);
-	chip->image[CS4231_IFACE_CTRL] |= CS4231_AUTOCALIB;
-	snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	snd_cs4231_mce_down(chip);
-
-#ifdef SNDRV_DEBUG_MCE
-	snd_printk("init: (2)\n");
-#endif
-
-	snd_cs4231_mce_up(chip);
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1]);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	snd_cs4231_mce_down(chip);
-
-#ifdef SNDRV_DEBUG_MCE
-	snd_printk("init: (3) - afei = 0x%x\n", chip->image[CS4231_ALT_FEATURE_1]);
-#endif
-
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	snd_cs4231_out(chip, CS4231_ALT_FEATURE_2, chip->image[CS4231_ALT_FEATURE_2]);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-
-	snd_cs4231_mce_up(chip);
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT]);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	snd_cs4231_mce_down(chip);
-
-#ifdef SNDRV_DEBUG_MCE
-	snd_printk("init: (4)\n");
-#endif
-
-	snd_cs4231_mce_up(chip);
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT]);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	snd_cs4231_mce_down(chip);
-
-#ifdef SNDRV_DEBUG_MCE
-	snd_printk("init: (5)\n");
-#endif
-}
-
-static int snd_cs4231_open(struct snd_cs4231 *chip, unsigned int mode)
-{
-	unsigned long flags;
-
-	mutex_lock(&chip->open_mutex);
-	if ((chip->mode & mode) ||
-	    ((chip->mode & CS4231_MODE_OPEN) && chip->single_dma)) {
-		mutex_unlock(&chip->open_mutex);
-		return -EAGAIN;
-	}
-	if (chip->mode & CS4231_MODE_OPEN) {
-		chip->mode |= mode;
-		mutex_unlock(&chip->open_mutex);
-		return 0;
-	}
-	/* ok. now enable and ack CODEC IRQ */
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
-		       CS4231_RECORD_IRQ |
-		       CS4231_TIMER_IRQ);
-	snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
-	cs4231_outb(chip, CS4231P(STATUS), 0);	/* clear IRQ */
-	cs4231_outb(chip, CS4231P(STATUS), 0);	/* clear IRQ */
-	chip->image[CS4231_PIN_CTRL] |= CS4231_IRQ_ENABLE;
-	snd_cs4231_out(chip, CS4231_PIN_CTRL, chip->image[CS4231_PIN_CTRL]);
-	snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
-		       CS4231_RECORD_IRQ |
-		       CS4231_TIMER_IRQ);
-	snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-
-	chip->mode = mode;
-	mutex_unlock(&chip->open_mutex);
-	return 0;
-}
-
-static void snd_cs4231_close(struct snd_cs4231 *chip, unsigned int mode)
-{
-	unsigned long flags;
-
-	mutex_lock(&chip->open_mutex);
-	chip->mode &= ~mode;
-	if (chip->mode & CS4231_MODE_OPEN) {
-		mutex_unlock(&chip->open_mutex);
-		return;
-	}
-	snd_cs4231_calibrate_mute(chip, 1);
-
-	/* disable IRQ */
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
-	cs4231_outb(chip, CS4231P(STATUS), 0);	/* clear IRQ */
-	cs4231_outb(chip, CS4231P(STATUS), 0);	/* clear IRQ */
-	chip->image[CS4231_PIN_CTRL] &= ~CS4231_IRQ_ENABLE;
-	snd_cs4231_out(chip, CS4231_PIN_CTRL, chip->image[CS4231_PIN_CTRL]);
-
-	/* now disable record & playback */
-
-	if (chip->image[CS4231_IFACE_CTRL] & (CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
-					       CS4231_RECORD_ENABLE | CS4231_RECORD_PIO)) {
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
-		snd_cs4231_mce_up(chip);
-		spin_lock_irqsave(&chip->reg_lock, flags);
-		chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
-						     CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
-		snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
-		snd_cs4231_mce_down(chip);
-		spin_lock_irqsave(&chip->reg_lock, flags);
-	}
-
-	/* clear IRQ again */
-	snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
-	cs4231_outb(chip, CS4231P(STATUS), 0);	/* clear IRQ */
-	cs4231_outb(chip, CS4231P(STATUS), 0);	/* clear IRQ */
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-
-	snd_cs4231_calibrate_mute(chip, 0);
-
-	chip->mode = 0;
-	mutex_unlock(&chip->open_mutex);
-}
-
-/*
- *  timer open/close
- */
-
-static int snd_cs4231_timer_open(struct snd_timer * timer)
-{
-	struct snd_cs4231 *chip = snd_timer_chip(timer);
-	snd_cs4231_open(chip, CS4231_MODE_TIMER);
-	return 0;
-}
-
-static int snd_cs4231_timer_close(struct snd_timer * timer)
-{
-	struct snd_cs4231 *chip = snd_timer_chip(timer);
-	snd_cs4231_close(chip, CS4231_MODE_TIMER);
-	return 0;
-}
-
-static struct snd_timer_hardware snd_cs4231_timer_table =
-{
-	.flags =	SNDRV_TIMER_HW_AUTO,
-	.resolution =	9945,
-	.ticks =	65535,
-	.open =		snd_cs4231_timer_open,
-	.close =	snd_cs4231_timer_close,
-	.c_resolution = snd_cs4231_timer_resolution,
-	.start =	snd_cs4231_timer_start,
-	.stop =		snd_cs4231_timer_stop,
-};
-
-/*
- *  ok.. exported functions..
- */
-
-static int snd_cs4231_playback_hw_params(struct snd_pcm_substream *substream,
-					 struct snd_pcm_hw_params *hw_params)
-{
-	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
-	unsigned char new_pdfr;
-	int err;
-
-	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
-		return err;
-	new_pdfr = snd_cs4231_get_format(chip, params_format(hw_params), params_channels(hw_params)) |
-		   snd_cs4231_get_rate(params_rate(hw_params));
-	chip->set_playback_format(chip, hw_params, new_pdfr);
-	return 0;
-}
-
-static int snd_cs4231_playback_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
-static int snd_cs4231_playback_prepare(struct snd_pcm_substream *substream)
-{
-	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	unsigned long flags;
-	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
-	unsigned int count = snd_pcm_lib_period_bytes(substream);
-
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	chip->p_dma_size = size;
-	chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO);
-	snd_dma_program(chip->dma1, runtime->dma_addr, size, DMA_MODE_WRITE | DMA_AUTOINIT);
-	count = snd_cs4231_get_count(chip->image[CS4231_PLAYBK_FORMAT], count) - 1;
-	snd_cs4231_out(chip, CS4231_PLY_LWR_CNT, (unsigned char) count);
-	snd_cs4231_out(chip, CS4231_PLY_UPR_CNT, (unsigned char) (count >> 8));
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-#if 0
-	snd_cs4231_debug(chip);
-#endif
-	return 0;
-}
-
-static int snd_cs4231_capture_hw_params(struct snd_pcm_substream *substream,
-					struct snd_pcm_hw_params *hw_params)
-{
-	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
-	unsigned char new_cdfr;
-	int err;
-
-	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
-		return err;
-	new_cdfr = snd_cs4231_get_format(chip, params_format(hw_params), params_channels(hw_params)) |
-		   snd_cs4231_get_rate(params_rate(hw_params));
-	chip->set_capture_format(chip, hw_params, new_cdfr);
-	return 0;
-}
-
-static int snd_cs4231_capture_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
-static int snd_cs4231_capture_prepare(struct snd_pcm_substream *substream)
-{
-	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	unsigned long flags;
-	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
-	unsigned int count = snd_pcm_lib_period_bytes(substream);
-
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	chip->c_dma_size = size;
-	chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
-	snd_dma_program(chip->dma2, runtime->dma_addr, size, DMA_MODE_READ | DMA_AUTOINIT);
-	count = snd_cs4231_get_count(chip->image[CS4231_REC_FORMAT], count) - 1;
-	if (chip->single_dma && chip->hardware != CS4231_HW_INTERWAVE) {
-		snd_cs4231_out(chip, CS4231_PLY_LWR_CNT, (unsigned char) count);
-		snd_cs4231_out(chip, CS4231_PLY_UPR_CNT, (unsigned char) (count >> 8));
-	} else {
-		snd_cs4231_out(chip, CS4231_REC_LWR_CNT, (unsigned char) count);
-		snd_cs4231_out(chip, CS4231_REC_UPR_CNT, (unsigned char) (count >> 8));
-	}
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	return 0;
-}
-
-void snd_cs4231_overrange(struct snd_cs4231 *chip)
-{
-	unsigned long flags;
-	unsigned char res;
-
-	spin_lock_irqsave(&chip->reg_lock, flags);
-	res = snd_cs4231_in(chip, CS4231_TEST_INIT);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
-	if (res & (0x08 | 0x02))	/* detect overrange only above 0dB; may be user selectable? */
-		chip->capture_substream->runtime->overrange++;
-}
-
-irqreturn_t snd_cs4231_interrupt(int irq, void *dev_id)
-{
-	struct snd_cs4231 *chip = dev_id;
-	unsigned char status;
-
-	status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);
-	if (status & CS4231_TIMER_IRQ) {
-		if (chip->timer)
-			snd_timer_interrupt(chip->timer, chip->timer->sticks);
-	}		
-	if (chip->single_dma && chip->hardware != CS4231_HW_INTERWAVE) {
-		if (status & CS4231_PLAYBACK_IRQ) {
-			if (chip->mode & CS4231_MODE_PLAY) {
-				if (chip->playback_substream)
-					snd_pcm_period_elapsed(chip->playback_substream);
-			}
-			if (chip->mode & CS4231_MODE_RECORD) {
-				if (chip->capture_substream) {
-					snd_cs4231_overrange(chip);
-					snd_pcm_period_elapsed(chip->capture_substream);
-				}
-			}
-		}
-	} else {
-		if (status & CS4231_PLAYBACK_IRQ) {
-			if (chip->playback_substream)
-				snd_pcm_period_elapsed(chip->playback_substream);
-		}
-		if (status & CS4231_RECORD_IRQ) {
-			if (chip->capture_substream) {
-				snd_cs4231_overrange(chip);
-				snd_pcm_period_elapsed(chip->capture_substream);
-			}
-		}
-	}
-
-	spin_lock(&chip->reg_lock);
-	snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
-	spin_unlock(&chip->reg_lock);
-	return IRQ_HANDLED;
-}
-
-static snd_pcm_uframes_t snd_cs4231_playback_pointer(struct snd_pcm_substream *substream)
-{
-	struct snd_cs4231 *chip = snd_pcm_substream_