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, 1955 insertions, 0 deletions

diff --git a/sound/isa/wss/Makefile b/sound/isa/wss/Makefile
new file mode 100644
index 00000000000..454fee769a3
--- /dev/null
+++ b/sound/isa/wss/Makefile
@@ -0,0 +1,10 @@
+#
+# Makefile for ALSA
+# Copyright (c) 2008 by Jaroslav Kysela <perex@perex.cz>
+#
+
+snd-wss-lib-objs := wss_lib.o
+
+# Toplevel Module Dependency
+obj-$(CONFIG_SND_WSS_LIB) += snd-wss-lib.o
+
diff --git a/sound/isa/wss/wss_lib.c b/sound/isa/wss/wss_lib.c
new file mode 100644
index 00000000000..c5795f32ed3
--- /dev/null
+++ b/sound/isa/wss/wss_lib.c
@@ -0,0 +1,1945 @@
+/*
+ *  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_chip(substream);
+	size_t ptr;
+
+	if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
+		return 0;
+	ptr = snd_dma_pointer(chip->dma1, chip->p_dma_size);
+	return bytes_to_frames(substream->runtime, ptr);
+}
+
+static snd_pcm_uframes_t snd_cs4231_capture_pointer(struct snd_pcm_substream *substream)<