diff --git a/sound/sparc/cs4231.c b/sound/sparc/cs4231.c
new file mode 100644
index 0000000..36f9fe4
--- /dev/null
+++ b/sound/sparc/cs4231.c
@@ -0,0 +1,2245 @@
+/*
+ * Driver for CS4231 sound chips found on Sparcs.
+ * Copyright (C) 2002 David S. Miller <davem@redhat.com>
+ *
+ * Based entirely upon drivers/sbus/audio/cs4231.c which is:
+ * Copyright (C) 1996, 1997, 1998, 1998 Derrick J Brashear (shadow@andrew.cmu.edu)
+ * and also sound/isa/cs423x/cs4231_lib.c which is:
+ * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/moduleparam.h>
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/info.h>
+#include <sound/control.h>
+#include <sound/timer.h>
+#include <sound/initval.h>
+#include <sound/pcm_params.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#ifdef CONFIG_SBUS
+#define SBUS_SUPPORT
+#endif
+
+#ifdef SBUS_SUPPORT
+#include <asm/sbus.h>
+#endif
+
+#if defined(CONFIG_PCI) && defined(CONFIG_SPARC64)
+#define EBUS_SUPPORT
+#endif
+
+#ifdef EBUS_SUPPORT
+#include <linux/pci.h>
+#include <asm/ebus.h>
+#endif
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for Sun CS4231 soundcard.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for Sun CS4231 soundcard.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable Sun CS4231 soundcard.");
+MODULE_AUTHOR("Jaroslav Kysela, Derrick J. Brashear and David S. Miller");
+MODULE_DESCRIPTION("Sun CS4231");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{Sun,CS4231}}");
+
+typedef struct snd_cs4231 {
+	spinlock_t		lock;
+	void __iomem		*port;
+#ifdef EBUS_SUPPORT
+	struct ebus_dma_info	eb2c;
+	struct ebus_dma_info	eb2p;
+#endif
+
+	u32			flags;
+#define CS4231_FLAG_EBUS	0x00000001
+#define CS4231_FLAG_PLAYBACK	0x00000002
+#define CS4231_FLAG_CAPTURE	0x00000004
+
+	snd_card_t		*card;
+	snd_pcm_t		*pcm;
+	snd_pcm_substream_t	*playback_substream;
+	unsigned int		p_periods_sent;
+	snd_pcm_substream_t	*capture_substream;
+	unsigned int		c_periods_sent;
+	snd_timer_t		*timer;
+
+	unsigned short mode;
+#define CS4231_MODE_NONE	0x0000
+#define CS4231_MODE_PLAY	0x0001
+#define CS4231_MODE_RECORD	0x0002
+#define CS4231_MODE_TIMER	0x0004
+#define CS4231_MODE_OPEN	(CS4231_MODE_PLAY|CS4231_MODE_RECORD|CS4231_MODE_TIMER)
+
+	unsigned char		image[32];	/* registers image */
+	int			mce_bit;
+	int			calibrate_mute;
+	struct semaphore	mce_mutex;
+	struct semaphore	open_mutex;
+
+	union {
+#ifdef SBUS_SUPPORT
+		struct sbus_dev		*sdev;
+#endif
+#ifdef EBUS_SUPPORT
+		struct pci_dev		*pdev;
+#endif
+	} dev_u;
+	unsigned int		irq[2];
+	unsigned int		regs_size;
+	struct snd_cs4231	*next;
+} cs4231_t;
+
+static cs4231_t *cs4231_list;
+
+/* Eventually we can use sound/isa/cs423x/cs4231_lib.c directly, but for
+ * now....  -DaveM
+ */
+
+/* IO ports */
+
+#define CS4231P(chip, x)	((chip)->port + c_d_c_CS4231##x)
+
+/* XXX offsets are different than PC ISA chips... */
+#define c_d_c_CS4231REGSEL	0x0
+#define c_d_c_CS4231REG		0x4
+#define c_d_c_CS4231STATUS	0x8
+#define c_d_c_CS4231PIO		0xc
+
+/* codec registers */
+
+#define CS4231_LEFT_INPUT	0x00	/* left input control */
+#define CS4231_RIGHT_INPUT	0x01	/* right input control */
+#define CS4231_AUX1_LEFT_INPUT	0x02	/* left AUX1 input control */
+#define CS4231_AUX1_RIGHT_INPUT	0x03	/* right AUX1 input control */
+#define CS4231_AUX2_LEFT_INPUT	0x04	/* left AUX2 input control */
+#define CS4231_AUX2_RIGHT_INPUT	0x05	/* right AUX2 input control */
+#define CS4231_LEFT_OUTPUT	0x06	/* left output control register */
+#define CS4231_RIGHT_OUTPUT	0x07	/* right output control register */
+#define CS4231_PLAYBK_FORMAT	0x08	/* clock and data format - playback - bits 7-0 MCE */
+#define CS4231_IFACE_CTRL	0x09	/* interface control - bits 7-2 MCE */
+#define CS4231_PIN_CTRL		0x0a	/* pin control */
+#define CS4231_TEST_INIT	0x0b	/* test and initialization */
+#define CS4231_MISC_INFO	0x0c	/* miscellaneaous information */
+#define CS4231_LOOPBACK		0x0d	/* loopback control */
+#define CS4231_PLY_UPR_CNT	0x0e	/* playback upper base count */
+#define CS4231_PLY_LWR_CNT	0x0f	/* playback lower base count */
+#define CS4231_ALT_FEATURE_1	0x10	/* alternate #1 feature enable */
+#define CS4231_ALT_FEATURE_2	0x11	/* alternate #2 feature enable */
+#define CS4231_LEFT_LINE_IN	0x12	/* left line input control */
+#define CS4231_RIGHT_LINE_IN	0x13	/* right line input control */
+#define CS4231_TIMER_LOW	0x14	/* timer low byte */
+#define CS4231_TIMER_HIGH	0x15	/* timer high byte */
+#define CS4231_LEFT_MIC_INPUT	0x16	/* left MIC input control register (InterWave only) */
+#define CS4231_RIGHT_MIC_INPUT	0x17	/* right MIC input control register (InterWave only) */
+#define CS4236_EXT_REG		0x17	/* extended register access */
+#define CS4231_IRQ_STATUS	0x18	/* irq status register */
+#define CS4231_LINE_LEFT_OUTPUT	0x19	/* left line output control register (InterWave only) */
+#define CS4231_VERSION		0x19	/* CS4231(A) - version values */
+#define CS4231_MONO_CTRL	0x1a	/* mono input/output control */
+#define CS4231_LINE_RIGHT_OUTPUT 0x1b	/* right line output control register (InterWave only) */
+#define CS4235_LEFT_MASTER	0x1b	/* left master output control */
+#define CS4231_REC_FORMAT	0x1c	/* clock and data format - record - bits 7-0 MCE */
+#define CS4231_PLY_VAR_FREQ	0x1d	/* playback variable frequency */
+#define CS4235_RIGHT_MASTER	0x1d	/* right master output control */
+#define CS4231_REC_UPR_CNT	0x1e	/* record upper count */
+#define CS4231_REC_LWR_CNT	0x1f	/* record lower count */
+
+/* definitions for codec register select port - CODECP( REGSEL ) */
+
+#define CS4231_INIT		0x80	/* CODEC is initializing */
+#define CS4231_MCE		0x40	/* mode change enable */
+#define CS4231_TRD		0x20	/* transfer request disable */
+
+/* definitions for codec status register - CODECP( STATUS ) */
+
+#define CS4231_GLOBALIRQ	0x01	/* IRQ is active */
+
+/* definitions for codec irq status */
+
+#define CS4231_PLAYBACK_IRQ	0x10
+#define CS4231_RECORD_IRQ	0x20
+#define CS4231_TIMER_IRQ	0x40
+#define CS4231_ALL_IRQS		0x70
+#define CS4231_REC_UNDERRUN	0x08
+#define CS4231_REC_OVERRUN	0x04
+#define CS4231_PLY_OVERRUN	0x02
+#define CS4231_PLY_UNDERRUN	0x01
+
+/* definitions for CS4231_LEFT_INPUT and CS4231_RIGHT_INPUT registers */
+
+#define CS4231_ENABLE_MIC_GAIN	0x20
+
+#define CS4231_MIXS_LINE	0x00
+#define CS4231_MIXS_AUX1	0x40
+#define CS4231_MIXS_MIC		0x80
+#define CS4231_MIXS_ALL		0xc0
+
+/* definitions for clock and data format register - CS4231_PLAYBK_FORMAT */
+
+#define CS4231_LINEAR_8		0x00	/* 8-bit unsigned data */
+#define CS4231_ALAW_8		0x60	/* 8-bit A-law companded */
+#define CS4231_ULAW_8		0x20	/* 8-bit U-law companded */
+#define CS4231_LINEAR_16	0x40	/* 16-bit twos complement data - little endian */
+#define CS4231_LINEAR_16_BIG	0xc0	/* 16-bit twos complement data - big endian */
+#define CS4231_ADPCM_16		0xa0	/* 16-bit ADPCM */
+#define CS4231_STEREO		0x10	/* stereo mode */
+/* bits 3-1 define frequency divisor */
+#define CS4231_XTAL1		0x00	/* 24.576 crystal */
+#define CS4231_XTAL2		0x01	/* 16.9344 crystal */
+
+/* definitions for interface control register - CS4231_IFACE_CTRL */
+
+#define CS4231_RECORD_PIO	0x80	/* record PIO enable */
+#define CS4231_PLAYBACK_PIO	0x40	/* playback PIO enable */
+#define CS4231_CALIB_MODE	0x18	/* calibration mode bits */
+#define CS4231_AUTOCALIB	0x08	/* auto calibrate */
+#define CS4231_SINGLE_DMA	0x04	/* use single DMA channel */
+#define CS4231_RECORD_ENABLE	0x02	/* record enable */
+#define CS4231_PLAYBACK_ENABLE	0x01	/* playback enable */
+
+/* definitions for pin control register - CS4231_PIN_CTRL */
+
+#define CS4231_IRQ_ENABLE	0x02	/* enable IRQ */
+#define CS4231_XCTL1		0x40	/* external control #1 */
+#define CS4231_XCTL0		0x80	/* external control #0 */
+
+/* definitions for test and init register - CS4231_TEST_INIT */
+
+#define CS4231_CALIB_IN_PROGRESS 0x20	/* auto calibrate in progress */
+#define CS4231_DMA_REQUEST	0x10	/* DMA request in progress */
+
+/* definitions for misc control register - CS4231_MISC_INFO */
+
+#define CS4231_MODE2		0x40	/* MODE 2 */
+#define CS4231_IW_MODE3		0x6c	/* MODE 3 - InterWave enhanced mode */
+#define CS4231_4236_MODE3	0xe0	/* MODE 3 - CS4236+ enhanced mode */
+
+/* definitions for alternate feature 1 register - CS4231_ALT_FEATURE_1 */
+
+#define	CS4231_DACZ		0x01	/* zero DAC when underrun */
+#define CS4231_TIMER_ENABLE	0x40	/* codec timer enable */
+#define CS4231_OLB		0x80	/* output level bit */
+
+/* SBUS DMA register defines.  */
+
+#define APCCSR	0x10UL	/* APC DMA CSR */
+#define APCCVA	0x20UL	/* APC Capture DMA Address */
+#define APCCC	0x24UL	/* APC Capture Count */
+#define APCCNVA	0x28UL	/* APC Capture DMA Next Address */
+#define APCCNC	0x2cUL	/* APC Capture Next Count */
+#define APCPVA	0x30UL	/* APC Play DMA Address */
+#define APCPC	0x34UL	/* APC Play Count */
+#define APCPNVA	0x38UL	/* APC Play DMA Next Address */
+#define APCPNC	0x3cUL	/* APC Play Next Count */
+
+/* APCCSR bits */
+
+#define APC_INT_PENDING 0x800000 /* Interrupt Pending */
+#define APC_PLAY_INT    0x400000 /* Playback interrupt */
+#define APC_CAPT_INT    0x200000 /* Capture interrupt */
+#define APC_GENL_INT    0x100000 /* General interrupt */
+#define APC_XINT_ENA    0x80000  /* General ext int. enable */
+#define APC_XINT_PLAY   0x40000  /* Playback ext intr */
+#define APC_XINT_CAPT   0x20000  /* Capture ext intr */
+#define APC_XINT_GENL   0x10000  /* Error ext intr */
+#define APC_XINT_EMPT   0x8000   /* Pipe empty interrupt (0 write to pva) */
+#define APC_XINT_PEMP   0x4000   /* Play pipe empty (pva and pnva not set) */
+#define APC_XINT_PNVA   0x2000   /* Playback NVA dirty */
+#define APC_XINT_PENA   0x1000   /* play pipe empty Int enable */
+#define APC_XINT_COVF   0x800    /* Cap data dropped on floor */
+#define APC_XINT_CNVA   0x400    /* Capture NVA dirty */
+#define APC_XINT_CEMP   0x200    /* Capture pipe empty (cva and cnva not set) */
+#define APC_XINT_CENA   0x100    /* Cap. pipe empty int enable */
+#define APC_PPAUSE      0x80     /* Pause the play DMA */
+#define APC_CPAUSE      0x40     /* Pause the capture DMA */
+#define APC_CDC_RESET   0x20     /* CODEC RESET */
+#define APC_PDMA_READY  0x08     /* Play DMA Go */
+#define APC_CDMA_READY  0x04     /* Capture DMA Go */
+#define APC_CHIP_RESET  0x01     /* Reset the chip */
+
+/* EBUS DMA register offsets  */
+
+#define EBDMA_CSR	0x00UL	/* Control/Status */
+#define EBDMA_ADDR	0x04UL	/* DMA Address */
+#define EBDMA_COUNT	0x08UL	/* DMA Count */
+
+/*
+ *  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 snd_pcm_hw_constraint_list_t hw_constraints_rates = {
+	.count	= 14,
+	.list	= rates,
+};
+
+static int snd_cs4231_xrate(snd_pcm_runtime_t *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 */
+	0x00,			/* 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 */
+	0x00,			/* 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 u8 __cs4231_readb(cs4231_t *cp, void __iomem *reg_addr)
+{
+#ifdef EBUS_SUPPORT
+	if (cp->flags & CS4231_FLAG_EBUS) {
+		return readb(reg_addr);
+	} else {
+#endif
+#ifdef SBUS_SUPPORT
+		return sbus_readb(reg_addr);
+#endif
+#ifdef EBUS_SUPPORT
+	}
+#endif
+}
+
+static void __cs4231_writeb(cs4231_t *cp, u8 val, void __iomem *reg_addr)
+{
+#ifdef EBUS_SUPPORT
+	if (cp->flags & CS4231_FLAG_EBUS) {
+		return writeb(val, reg_addr);
+	} else {
+#endif
+#ifdef SBUS_SUPPORT
+		return sbus_writeb(val, reg_addr);
+#endif
+#ifdef EBUS_SUPPORT
+	}
+#endif
+}
+
+/*
+ *  Basic I/O functions
+ */
+
+static void snd_cs4231_outm(cs4231_t *chip, unsigned char reg,
+		     unsigned char mask, unsigned char value)
+{
+	int timeout;
+	unsigned char tmp;
+
+	for (timeout = 250;
+	     timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
+	     timeout--)
+	     	udelay(100);
+#ifdef CONFIG_SND_DEBUG
+	if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
+		snd_printk("outm: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
+#endif
+	if (chip->calibrate_mute) {
+		chip->image[reg] &= mask;
+		chip->image[reg] |= value;
+	} else {
+		__cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
+		mb();
+		tmp = (chip->image[reg] & mask) | value;
+		__cs4231_writeb(chip, tmp, CS4231P(chip, REG));
+		chip->image[reg] = tmp;
+		mb();
+	}
+}
+
+static void snd_cs4231_dout(cs4231_t *chip, unsigned char reg, unsigned char value)
+{
+	int timeout;
+
+	for (timeout = 250;
+	     timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
+	     timeout--)
+	     	udelay(100);
+	__cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
+	__cs4231_writeb(chip, value, CS4231P(chip, REG));
+	mb();
+}
+
+static void snd_cs4231_out(cs4231_t *chip, unsigned char reg, unsigned char value)
+{
+	int timeout;
+
+	for (timeout = 250;
+	     timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
+	     timeout--)
+	     	udelay(100);
+#ifdef CONFIG_SND_DEBUG
+	if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
+		snd_printk("out: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
+#endif
+	__cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
+	__cs4231_writeb(chip, value, CS4231P(chip, REG));
+	chip->image[reg] = value;
+	mb();
+#if 0
+	printk("codec out - reg 0x%x = 0x%x\n", chip->mce_bit | reg, value);
+#endif
+}
+
+static unsigned char snd_cs4231_in(cs4231_t *chip, unsigned char reg)
+{
+	int timeout;
+	unsigned char ret;
+
+	for (timeout = 250;
+	     timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
+	     timeout--)
+	     	udelay(100);
+#ifdef CONFIG_SND_DEBUG
+	if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
+		snd_printk("in: auto calibration time out - reg = 0x%x\n", reg);
+#endif
+	__cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
+	mb();
+	ret = __cs4231_readb(chip, CS4231P(chip, REG));
+#if 0
+	printk("codec in - reg 0x%x = 0x%x\n", chip->mce_bit | reg, ret);
+#endif
+	return ret;
+}
+
+#if 0
+
+static void snd_cs4231_debug(cs4231_t *chip)
+{
+	printk("CS4231 REGS:      INDEX = 0x%02x  ",
+	       __cs4231_readb(chip, CS4231P(chip, REGSEL)));
+	printk("                 STATUS = 0x%02x\n",
+	       __cs4231_readb(chip, CS4231P(chip, 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: rec upr count   = 0x%02x\n", snd_cs4231_in(chip, 0x1e));
+	printk("  0x0f: ply lwr 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(cs4231_t *chip)
+{
+	int timeout;
+
+	/* huh.. looks like this sequence is proper for CS4231A chip (GUS MAX) */
+	for (timeout = 5; timeout > 0; timeout--)
+		__cs4231_readb(chip, CS4231P(chip, REGSEL));
+	/* end of cleanup sequence */
+	for (timeout = 250;
+	     timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
+	     timeout--)
+	     	udelay(100);
+}
+
+static void snd_cs4231_mce_up(cs4231_t *chip)
+{
+	unsigned long flags;
+	int timeout;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	for (timeout = 250; timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT); timeout--)
+		udelay(100);
+#ifdef CONFIG_SND_DEBUG
+	if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
+		snd_printk("mce_up - auto calibration time out (0)\n");
+#endif
+	chip->mce_bit |= CS4231_MCE;
+	timeout = __cs4231_readb(chip, CS4231P(chip, REGSEL));
+	if (timeout == 0x80)
+		snd_printk("mce_up [%p]: serious init problem - codec still busy\n", chip->port);
+	if (!(timeout & CS4231_MCE))
+		__cs4231_writeb(chip, chip->mce_bit | (timeout & 0x1f), CS4231P(chip, REGSEL));
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static void snd_cs4231_mce_down(cs4231_t *chip)
+{
+	unsigned long flags;
+	int timeout;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	snd_cs4231_busy_wait(chip);
+#if 0
+	printk("(1) timeout = %i\n", timeout);
+#endif
+#ifdef CONFIG_SND_DEBUG
+	if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
+		snd_printk("mce_down [%p] - auto calibration time out (0)\n", CS4231P(chip, REGSEL));
+#endif
+	chip->mce_bit &= ~CS4231_MCE;
+	timeout = __cs4231_readb(chip, CS4231P(chip, REGSEL));
+	__cs4231_writeb(chip, chip->mce_bit | (timeout & 0x1f), CS4231P(chip, REGSEL));
+	if (timeout == 0x80)
+		snd_printk("mce_down [%p]: serious init problem - codec still busy\n", chip->port);
+	if ((timeout & CS4231_MCE) == 0) {
+		spin_unlock_irqrestore(&chip->lock, flags);
+		return;
+	}
+	snd_cs4231_busy_wait(chip);
+
+	/* calibration process */
+
+	for (timeout = 500; timeout > 0 && (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0; timeout--)
+		udelay(100);
+	if ((snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0) {
+		snd_printd("cs4231_mce_down - auto calibration time out (1)\n");
+		spin_unlock_irqrestore(&chip->lock, flags);
+		return;
+	}
+#if 0
+	printk("(2) timeout = %i, jiffies = %li\n", timeout, jiffies);
+#endif
+	/* in 10ms increments, check condition, up to 250ms */
+	timeout = 25;
+	while (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) {
+		spin_unlock_irqrestore(&chip->lock, flags);
+		if (--timeout < 0) {
+			snd_printk("mce_down - auto calibration time out (2)\n");
+			return;
+		}
+		msleep(10);
+		spin_lock_irqsave(&chip->lock, flags);
+	}
+#if 0
+	printk("(3) jiffies = %li\n", jiffies);
+#endif
+	/* in 10ms increments, check condition, up to 100ms */
+	timeout = 10;
+	while (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT) {
+		spin_unlock_irqrestore(&chip->lock, flags);
+		if (--timeout < 0) {
+			snd_printk("mce_down - auto calibration time out (3)\n");
+			return;
+		}
+		msleep(10);
+		spin_lock_irqsave(&chip->lock, flags);
+	}
+	spin_unlock_irqrestore(&chip->lock, flags);
+#if 0
+	printk("(4) jiffies = %li\n", jiffies);
+	snd_printk("mce_down - exit = 0x%x\n", __cs4231_readb(chip, CS4231P(chip, REGSEL)));
+#endif
+}
+
+#if 0 /* Unused for now... */
+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;
+}
+#endif
+
+#ifdef EBUS_SUPPORT
+static void snd_cs4231_ebus_advance_dma(struct ebus_dma_info *p, snd_pcm_substream_t *substream, unsigned int *periods_sent)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	while (1) {
+		unsigned int dma_size = snd_pcm_lib_period_bytes(substream);
+		unsigned int offset = dma_size * (*periods_sent);
+
+		if (dma_size >= (1 << 24))
+			BUG();
+
+		if (ebus_dma_request(p, runtime->dma_addr + offset, dma_size))
+			return;
+#if 0
+		printk("ebus_advance: Sent period %u (size[%x] offset[%x])\n",
+		       (*periods_sent), dma_size, offset);
+#endif
+		(*periods_sent) = ((*periods_sent) + 1) % runtime->periods;
+	}
+}
+#endif
+
+static void cs4231_dma_trigger(cs4231_t *chip, unsigned int what, int on)
+{
+#ifdef EBUS_SUPPORT
+	if (chip->flags & CS4231_FLAG_EBUS) {
+		if (what & CS4231_PLAYBACK_ENABLE) {
+			if (on) {
+				ebus_dma_prepare(&chip->eb2p, 0);
+				ebus_dma_enable(&chip->eb2p, 1);
+				snd_cs4231_ebus_advance_dma(&chip->eb2p,
+					chip->playback_substream,
+					&chip->p_periods_sent);
+			} else {
+				ebus_dma_enable(&chip->eb2p, 0);
+			}
+		}
+		if (what & CS4231_RECORD_ENABLE) {
+			if (on) {
+				ebus_dma_prepare(&chip->eb2c, 1);
+				ebus_dma_enable(&chip->eb2c, 1);
+				snd_cs4231_ebus_advance_dma(&chip->eb2c,
+					chip->capture_substream,
+					&chip->c_periods_sent);
+			} else {
+				ebus_dma_enable(&chip->eb2c, 0);
+			}
+		}
+	} else {
+#endif
+#ifdef SBUS_SUPPORT
+#endif
+#ifdef EBUS_SUPPORT
+	}
+#endif
+}
+
+static int snd_cs4231_trigger(snd_pcm_substream_t *substream, int cmd)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+	int result = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_STOP:
+	{
+		unsigned int what = 0;
+		snd_pcm_substream_t *s;
+		struct list_head *pos;
+		unsigned long flags;
+
+		snd_pcm_group_for_each(pos, substream) {
+			s = snd_pcm_group_substream_entry(pos);
+			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);
+			}
+		}
+
+#if 0
+		printk("TRIGGER: what[%x] on(%d)\n",
+		       what, (cmd == SNDRV_PCM_TRIGGER_START));
+#endif
+
+		spin_lock_irqsave(&chip->lock, flags);
+		if (cmd == SNDRV_PCM_TRIGGER_START) {
+			cs4231_dma_trigger(chip, what, 1);
+			chip->image[CS4231_IFACE_CTRL] |= what;
+			if (what & CS4231_PLAYBACK_ENABLE) {
+				snd_cs4231_out(chip, CS4231_PLY_LWR_CNT, 0xff);
+				snd_cs4231_out(chip, CS4231_PLY_UPR_CNT, 0xff);
+			}
+			if (what & CS4231_RECORD_ENABLE) {
+				snd_cs4231_out(chip, CS4231_REC_LWR_CNT, 0xff);
+				snd_cs4231_out(chip, CS4231_REC_UPR_CNT, 0xff);
+			}
+		} else {
+			cs4231_dma_trigger(chip, what, 0);
+			chip->image[CS4231_IFACE_CTRL] &= ~what;
+		}
+		snd_cs4231_out(chip, CS4231_IFACE_CTRL,
+			       chip->image[CS4231_IFACE_CTRL]);
+		spin_unlock_irqrestore(&chip->lock, flags);
+		break;
+	}
+	default:
+		result = -EINVAL;
+		break;
+	}
+#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 < 14; i++)
+		if (rate == rates[i])
+			return freq_bits[i];
+	// snd_BUG();
+	return freq_bits[13];
+}
+
+static unsigned char snd_cs4231_get_format(cs4231_t *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(cs4231_t *chip, int mute)
+{
+	unsigned long flags;
+
+	mute = mute ? 1 : 0;
+	spin_lock_irqsave(&chip->lock, flags);
+	if (chip->calibrate_mute == mute) {
+		spin_unlock_irqrestore(&chip->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]);
+	chip->calibrate_mute = mute;
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static void snd_cs4231_playback_format(cs4231_t *chip, snd_pcm_hw_params_t *params,
+				       unsigned char pdfr)
+{
+	unsigned long flags;
+
+	down(&chip->mce_mutex);
+	snd_cs4231_calibrate_mute(chip, 1);
+
+	snd_cs4231_mce_up(chip);
+
+	spin_lock_irqsave(&chip->lock, flags);
+	snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
+		       (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) ?
+		       (pdfr & 0xf0) | (chip->image[CS4231_REC_FORMAT] & 0x0f) :
+		       pdfr);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	snd_cs4231_mce_down(chip);
+
+	snd_cs4231_calibrate_mute(chip, 0);
+	up(&chip->mce_mutex);
+}
+
+static void snd_cs4231_capture_format(cs4231_t *chip, snd_pcm_hw_params_t *params,
+                                      unsigned char cdfr)
+{
+	unsigned long flags;
+
+	down(&chip->mce_mutex);
+	snd_cs4231_calibrate_mute(chip, 1);
+
+	snd_cs4231_mce_up(chip);
+
+	spin_lock_irqsave(&chip->lock, flags);
+	if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
+		snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
+			       ((chip->image[CS4231_PLAYBK_FORMAT]) & 0xf0) |
+			       (cdfr & 0x0f));
+		spin_unlock_irqrestore(&chip->lock, flags);
+		snd_cs4231_mce_down(chip);
+		snd_cs4231_mce_up(chip);
+		spin_lock_irqsave(&chip->lock, flags);
+	}
+	snd_cs4231_out(chip, CS4231_REC_FORMAT, cdfr);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	snd_cs4231_mce_down(chip);
+
+	snd_cs4231_calibrate_mute(chip, 0);
+	up(&chip->mce_mutex);
+}
+
+/*
+ *  Timer interface
+ */
+
+static unsigned long snd_cs4231_timer_resolution(snd_timer_t *timer)
+{
+	cs4231_t *chip = snd_timer_chip(timer);
+
+	return chip->image[CS4231_PLAYBK_FORMAT] & 1 ? 9969 : 9920;
+}
+
+static int snd_cs4231_timer_start(snd_timer_t *timer)
+{
+	unsigned long flags;
+	unsigned int ticks;
+	cs4231_t *chip = snd_timer_chip(timer);
+
+	spin_lock_irqsave(&chip->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->lock, flags);
+
+	return 0;
+}
+
+static int snd_cs4231_timer_stop(snd_timer_t *timer)
+{
+	unsigned long flags;
+	cs4231_t *chip = snd_timer_chip(timer);
+
+	spin_lock_irqsave(&chip->lock, flags);
+	snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
+		       chip->image[CS4231_ALT_FEATURE_1] &= ~CS4231_TIMER_ENABLE);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static void snd_cs4231_init(cs4231_t *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->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->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->lock, flags);
+	snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1]);
+	spin_unlock_irqrestore(&chip->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->lock, flags);
+	snd_cs4231_out(chip, CS4231_ALT_FEATURE_2, chip->image[CS4231_ALT_FEATURE_2]);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	snd_cs4231_mce_up(chip);
+	spin_lock_irqsave(&chip->lock, flags);
+	snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT]);
+	spin_unlock_irqrestore(&chip->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->lock, flags);
+	snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT]);
+	spin_unlock_irqrestore(&chip->lock, flags);
+	snd_cs4231_mce_down(chip);
+
+#ifdef SNDRV_DEBUG_MCE
+	snd_printk("init: (5)\n");
+#endif
+}
+
+static int snd_cs4231_open(cs4231_t *chip, unsigned int mode)
+{
+	unsigned long flags;
+
+	down(&chip->open_mutex);
+	if ((chip->mode & mode)) {
+		up(&chip->open_mutex);
+		return -EAGAIN;
+	}
+	if (chip->mode & CS4231_MODE_OPEN) {
+		chip->mode |= mode;
+		up(&chip->open_mutex);
+		return 0;
+	}
+	/* ok. now enable and ack CODEC IRQ */
+	spin_lock_irqsave(&chip->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_writeb(chip, 0, CS4231P(chip, STATUS));	/* clear IRQ */
+	__cs4231_writeb(chip, 0, CS4231P(chip, STATUS));	/* clear IRQ */
+
+	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->lock, flags);
+
+	chip->mode = mode;
+	up(&chip->open_mutex);
+	return 0;
+}
+
+static void snd_cs4231_close(cs4231_t *chip, unsigned int mode)
+{
+	unsigned long flags;
+
+	down(&chip->open_mutex);
+	chip->mode &= ~mode;
+	if (chip->mode & CS4231_MODE_OPEN) {
+		up(&chip->open_mutex);
+		return;
+	}
+	snd_cs4231_calibrate_mute(chip, 1);
+
+	/* disable IRQ */
+	spin_lock_irqsave(&chip->lock, flags);
+	snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
+	__cs4231_writeb(chip, 0, CS4231P(chip, STATUS));	/* clear IRQ */
+	__cs4231_writeb(chip, 0, CS4231P(chip, STATUS));	/* clear IRQ */
+
+	/* 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->lock, flags);
+		snd_cs4231_mce_up(chip);
+		spin_lock_irqsave(&chip->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->lock, flags);
+		snd_cs4231_mce_down(chip);
+		spin_lock_irqsave(&chip->lock, flags);
+	}
+
+	/* clear IRQ again */
+	snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
+	__cs4231_writeb(chip, 0, CS4231P(chip, STATUS));	/* clear IRQ */
+	__cs4231_writeb(chip, 0, CS4231P(chip, STATUS));	/* clear IRQ */
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	snd_cs4231_calibrate_mute(chip, 0);
+
+	chip->mode = 0;
+	up(&chip->open_mutex);
+}
+
+/*
+ *  timer open/close
+ */
+
+static int snd_cs4231_timer_open(snd_timer_t *timer)
+{
+	cs4231_t *chip = snd_timer_chip(timer);
+	snd_cs4231_open(chip, CS4231_MODE_TIMER);
+	return 0;
+}
+
+static int snd_cs4231_timer_close(snd_timer_t * timer)
+{
+	cs4231_t *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(snd_pcm_substream_t *substream,
+					 snd_pcm_hw_params_t *hw_params)
+{
+	cs4231_t *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));
+	snd_cs4231_playback_format(chip, hw_params, new_pdfr);
+
+	return 0;
+}
+
+static int snd_cs4231_playback_hw_free(snd_pcm_substream_t *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_cs4231_playback_prepare(snd_pcm_substream_t *substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE |
+					    CS4231_PLAYBACK_PIO);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static int snd_cs4231_capture_hw_params(snd_pcm_substream_t *substream,
+					snd_pcm_hw_params_t *hw_params)
+{
+	cs4231_t *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));
+	snd_cs4231_capture_format(chip, hw_params, new_cdfr);
+
+	return 0;
+}
+
+static int snd_cs4231_capture_hw_free(snd_pcm_substream_t *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_cs4231_capture_prepare(snd_pcm_substream_t *substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE |
+					    CS4231_RECORD_PIO);
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static void snd_cs4231_overrange(cs4231_t *chip)
+{
+	unsigned long flags;
+	unsigned char res;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	res = snd_cs4231_in(chip, CS4231_TEST_INIT);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	if (res & (0x08 | 0x02))	/* detect overrange only above 0dB; may be user selectable? */
+		chip->capture_substream->runtime->overrange++;
+}
+
+static void snd_cs4231_generic_interrupt(cs4231_t *chip)
+{
+	unsigned long flags;
+	unsigned char status;
+
+	status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);
+	if (!status)
+		return;
+
+	if (status & CS4231_TIMER_IRQ) {
+		if (chip->timer)
+			snd_timer_interrupt(chip->timer, chip->timer->sticks);
+	}		
+	if (status & CS4231_PLAYBACK_IRQ)
+		snd_pcm_period_elapsed(chip->playback_substream);
+	if (status & CS4231_RECORD_IRQ) {
+		snd_cs4231_overrange(chip);
+		snd_pcm_period_elapsed(chip->capture_substream);
+	}
+
+	/* ACK the CS4231 interrupt. */
+	spin_lock_irqsave(&chip->lock, flags);
+	snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+#ifdef SBUS_SUPPORT
+static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	cs4231_t *chip = dev_id;
+	u32 csr;
+
+	csr = sbus_readl(chip->port + APCCSR);
+	if (!(csr & (APC_INT_PENDING |
+		     APC_PLAY_INT |
+		     APC_CAPT_INT |
+		     APC_GENL_INT |
+		     APC_XINT_PEMP |
+		     APC_XINT_CEMP)))
+		return IRQ_NONE;
+
+	/* ACK the APC interrupt. */
+	sbus_writel(csr, chip->port + APCCSR);
+
+	snd_cs4231_generic_interrupt(chip);
+
+	return IRQ_HANDLED;
+}
+#endif
+
+#ifdef EBUS_SUPPORT
+static void snd_cs4231_ebus_play_callback(struct ebus_dma_info *p, int event, void *cookie)
+{
+	cs4231_t *chip = cookie;
+
+	if (chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE) {
+		snd_pcm_period_elapsed(chip->playback_substream);
+		snd_cs4231_ebus_advance_dma(p, chip->playback_substream,
+					    &chip->p_periods_sent);
+	}
+}
+
+static void snd_cs4231_ebus_capture_callback(struct ebus_dma_info *p, int event, void *cookie)
+{
+	cs4231_t *chip = cookie;
+
+	if (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) {
+		snd_pcm_period_elapsed(chip->capture_substream);
+		snd_cs4231_ebus_advance_dma(p, chip->capture_substream,
+					    &chip->c_periods_sent);
+	}
+}
+#endif
+
+static snd_pcm_uframes_t snd_cs4231_playback_pointer(snd_pcm_substream_t *substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+	size_t ptr, residue, period_bytes;
+
+	if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
+		return 0;
+	period_bytes = snd_pcm_lib_period_bytes(substream);
+	ptr = period_bytes * chip->p_periods_sent;
+#ifdef EBUS_SUPPORT
+	if (chip->flags & CS4231_FLAG_EBUS) {
+		residue = ebus_dma_residue(&chip->eb2p);
+	} else {
+#endif
+#ifdef SBUS_SUPPORT
+		residue = sbus_readl(chip->port + APCPC);
+#endif
+#ifdef EBUS_SUPPORT
+	}
+#endif
+	ptr += (period_bytes - residue);
+	return bytes_to_frames(substream->runtime, ptr);
+}
+
+static snd_pcm_uframes_t snd_cs4231_capture_pointer(snd_pcm_substream_t * substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+	size_t ptr, residue, period_bytes;
+	
+	if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE))
+		return 0;
+	period_bytes = snd_pcm_lib_period_bytes(substream);
+	ptr = period_bytes * chip->c_periods_sent;
+#ifdef EBUS_SUPPORT
+	if (chip->flags & CS4231_FLAG_EBUS) {
+		residue = ebus_dma_residue(&chip->eb2c);
+	} else {
+#endif
+#ifdef SBUS_SUPPORT
+		residue = sbus_readl(chip->port + APCCC);
+#endif
+#ifdef EBUS_SUPPORT
+	}
+#endif
+	ptr += (period_bytes - residue);
+	return bytes_to_frames(substream->runtime, ptr);
+}
+
+/*
+
+ */
+
+static int snd_cs4231_probe(cs4231_t *chip)
+{
+	unsigned long flags;
+	int i, id, vers;
+	unsigned char *ptr;
+
+#if 0
+	snd_cs4231_debug(chip);
+#endif
+	id = vers = 0;
+	for (i = 0; i < 50; i++) {
+		mb();
+		if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
+			udelay(2000);
+		else {
+			spin_lock_irqsave(&chip->lock, flags);
+			snd_cs4231_out(chip, CS4231_MISC_INFO, CS4231_MODE2);
+			id = snd_cs4231_in(chip, CS4231_MISC_INFO) & 0x0f;
+			vers = snd_cs4231_in(chip, CS4231_VERSION);
+			spin_unlock_irqrestore(&chip->lock, flags);
+			if (id == 0x0a)
+				break;	/* this is valid value */
+		}
+	}
+	snd_printdd("cs4231: port = %p, id = 0x%x\n", chip->port, id);
+	if (id != 0x0a)
+		return -ENODEV;	/* no valid device found */
+
+	spin_lock_irqsave(&chip->lock, flags);
+
+
+	/* Reset DMA engine.  */
+#ifdef EBUS_SUPPORT
+	if (chip->flags & CS4231_FLAG_EBUS) {
+		/* Done by ebus_dma_register */
+	} else {
+#endif
+#ifdef SBUS_SUPPORT
+                sbus_writel(APC_CHIP_RESET, chip->port + APCCSR);
+                sbus_writel(0x00, chip->port + APCCSR);
+                sbus_writel(sbus_readl(chip->port + APCCSR) | APC_CDC_RESET,
+			    chip->port + APCCSR);
+  
+                udelay(20);
+  
+                sbus_writel(sbus_readl(chip->port + APCCSR) & ~APC_CDC_RESET,
+			    chip->port + APCCSR);
+                sbus_writel(sbus_readl(chip->port + APCCSR) | (APC_XINT_ENA |
+							       APC_XINT_PENA |
+							       APC_XINT_CENA),
+			    chip->port + APCCSR);
+#endif
+#ifdef EBUS_SUPPORT
+	}
+#endif
+
+	__cs4231_readb(chip, CS4231P(chip, STATUS));	/* clear any pendings IRQ */
+	__cs4231_writeb(chip, 0, CS4231P(chip, STATUS));
+	mb();
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	chip->image[CS4231_MISC_INFO] = CS4231_MODE2;
+	chip->image[CS4231_IFACE_CTRL] =
+		chip->image[CS4231_IFACE_CTRL] & ~CS4231_SINGLE_DMA;
+	chip->image[CS4231_ALT_FEATURE_1] = 0x80;
+	chip->image[CS4231_ALT_FEATURE_2] = 0x01;
+	if (vers & 0x20)
+		chip->image[CS4231_ALT_FEATURE_2] |= 0x02;
+
+	ptr = (unsigned char *) &chip->image;
+
+	snd_cs4231_mce_down(chip);
+
+	spin_lock_irqsave(&chip->lock, flags);
+
+	for (i = 0; i < 32; i++)	/* ok.. fill all CS4231 registers */
+		snd_cs4231_out(chip, i, *ptr++);
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	snd_cs4231_mce_up(chip);
+
+	snd_cs4231_mce_down(chip);
+
+	mdelay(2);
+
+	return 0;		/* all things are ok.. */
+}
+
+static snd_pcm_hardware_t snd_cs4231_playback =
+{
+	.info			= (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
+	.formats		= (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
+				 SNDRV_PCM_FMTBIT_IMA_ADPCM |
+				 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
+				 SNDRV_PCM_FMTBIT_S16_BE),
+	.rates			= SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
+	.rate_min		= 5510,
+	.rate_max		= 48000,
+	.channels_min		= 1,
+	.channels_max		= 2,
+	.buffer_bytes_max	= (32*1024),
+	.period_bytes_min	= 4096,
+	.period_bytes_max	= (32*1024),
+	.periods_min		= 1,
+	.periods_max		= 1024,
+};
+
+static snd_pcm_hardware_t snd_cs4231_capture =
+{
+	.info			= (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
+	.formats		= (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
+				 SNDRV_PCM_FMTBIT_IMA_ADPCM |
+				 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
+				 SNDRV_PCM_FMTBIT_S16_BE),
+	.rates			= SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
+	.rate_min		= 5510,
+	.rate_max		= 48000,
+	.channels_min		= 1,
+	.channels_max		= 2,
+	.buffer_bytes_max	= (32*1024),
+	.period_bytes_min	= 4096,
+	.period_bytes_max	= (32*1024),
+	.periods_min		= 1,
+	.periods_max		= 1024,
+};
+
+static int snd_cs4231_playback_open(snd_pcm_substream_t *substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int err;
+
+	runtime->hw = snd_cs4231_playback;
+
+	if ((err = snd_cs4231_open(chip, CS4231_MODE_PLAY)) < 0) {
+		snd_free_pages(runtime->dma_area, runtime->dma_bytes);
+		return err;
+	}
+	chip->playback_substream = substream;
+	chip->p_periods_sent = 0;
+	snd_pcm_set_sync(substream);
+	snd_cs4231_xrate(runtime);
+
+	return 0;
+}
+
+static int snd_cs4231_capture_open(snd_pcm_substream_t *substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int err;
+
+	runtime->hw = snd_cs4231_capture;
+
+	if ((err = snd_cs4231_open(chip, CS4231_MODE_RECORD)) < 0) {
+		snd_free_pages(runtime->dma_area, runtime->dma_bytes);
+		return err;
+	}
+	chip->capture_substream = substream;
+	chip->c_periods_sent = 0;
+	snd_pcm_set_sync(substream);
+	snd_cs4231_xrate(runtime);
+
+	return 0;
+}
+
+static int snd_cs4231_playback_close(snd_pcm_substream_t *substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+
+	chip->playback_substream = NULL;
+	snd_cs4231_close(chip, CS4231_MODE_PLAY);
+
+	return 0;
+}
+
+static int snd_cs4231_capture_close(snd_pcm_substream_t *substream)
+{
+	cs4231_t *chip = snd_pcm_substream_chip(substream);
+
+	chip->capture_substream = NULL;
+	snd_cs4231_close(chip, CS4231_MODE_RECORD);
+
+	return 0;
+}
+
+/* XXX We can do some power-management, in particular on EBUS using
+ * XXX the audio AUXIO register...
+ */
+
+static snd_pcm_ops_t snd_cs4231_playback_ops = {
+	.open		=	snd_cs4231_playback_open,
+	.close		=	snd_cs4231_playback_close,
+	.ioctl		=	snd_pcm_lib_ioctl,
+	.hw_params	=	snd_cs4231_playback_hw_params,
+	.hw_free	=	snd_cs4231_playback_hw_free,
+	.prepare	=	snd_cs4231_playback_prepare,
+	.trigger	=	snd_cs4231_trigger,
+	.pointer	=	snd_cs4231_playback_pointer,
+};
+
+static snd_pcm_ops_t snd_cs4231_capture_ops = {
+	.open		=	snd_cs4231_capture_open,
+	.close		=	snd_cs4231_capture_close,
+	.ioctl		=	snd_pcm_lib_ioctl,
+	.hw_params	=	snd_cs4231_capture_hw_params,
+	.hw_free	=	snd_cs4231_capture_hw_free,
+	.prepare	=	snd_cs4231_capture_prepare,
+	.trigger	=	snd_cs4231_trigger,
+	.pointer	=	snd_cs4231_capture_pointer,
+};
+
+static void snd_cs4231_pcm_free(snd_pcm_t *pcm)
+{
+	cs4231_t *chip = pcm->private_data;
+	chip->pcm = NULL;
+	snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+int snd_cs4231_pcm(cs4231_t *chip)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	if ((err = snd_pcm_new(chip->card, "CS4231", 0, 1, 1, &pcm)) < 0)
+		return err;
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs4231_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs4231_capture_ops);
+	
+	/* global setup */
+	pcm->private_data = chip;
+	pcm->private_free = snd_cs4231_pcm_free;
+	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
+	strcpy(pcm->name, "CS4231");
+
+#ifdef EBUS_SUPPORT
+	if (chip->flags & CS4231_FLAG_EBUS) {
+		snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+						      snd_dma_pci_data(chip->dev_u.pdev),
+						      64*1024, 128*1024);
+	} else {
+#endif
+#ifdef SBUS_SUPPORT
+		snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_SBUS,
+						      snd_dma_sbus_data(chip->dev_u.sdev),
+						      64*1024, 128*1024);
+#endif
+#ifdef EBUS_SUPPORT
+	}
+#endif
+
+	chip->pcm = pcm;
+
+	return 0;
+}
+
+static void snd_cs4231_timer_free(snd_timer_t *timer)
+{
+	cs4231_t *chip = timer->private_data;
+	chip->timer = NULL;
+}
+
+int snd_cs4231_timer(cs4231_t *chip)
+{
+	snd_timer_t *timer;
+	snd_timer_id_t tid;
+	int err;
+
+	/* Timer initialization */
+	tid.dev_class = SNDRV_TIMER_CLASS_CARD;
+	tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
+	tid.card = chip->card->number;
+	tid.device = 0;
+	tid.subdevice = 0;
+	if ((err = snd_timer_new(chip->card, "CS4231", &tid, &timer)) < 0)
+		return err;
+	strcpy(timer->name, "CS4231");
+	timer->private_data = chip;
+	timer->private_free = snd_cs4231_timer_free;
+	timer->hw = snd_cs4231_timer_table;
+	chip->timer = timer;
+
+	return 0;
+}
+	
+/*
+ *  MIXER part
+ */
+
+static int snd_cs4231_info_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	static char *texts[4] = {
+		"Line", "CD", "Mic", "Mix"
+	};
+	cs4231_t *chip = snd_kcontrol_chip(kcontrol);
+
+	snd_assert(chip->card != NULL, return -EINVAL);
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 2;
+	uinfo->value.enumerated.items = 4;
+	if (uinfo->value.enumerated.item > 3)
+		uinfo->value.enumerated.item = 3;
+	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
+
+	return 0;
+}
+
+static int snd_cs4231_get_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	cs4231_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+	
+	spin_lock_irqsave(&chip->lock, flags);
+	ucontrol->value.enumerated.item[0] =
+		(chip->image[CS4231_LEFT_INPUT] & CS4231_MIXS_ALL) >> 6;
+	ucontrol->value.enumerated.item[1] =
+		(chip->image[CS4231_RIGHT_INPUT] & CS4231_MIXS_ALL) >> 6;
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static int snd_cs4231_put_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	cs4231_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+	unsigned short left, right;
+	int change;
+	
+	if (ucontrol->value.enumerated.item[0] > 3 ||
+	    ucontrol->value.enumerated.item[1] > 3)
+		return -EINVAL;
+	left = ucontrol->value.enumerated.item[0] << 6;
+	right = ucontrol->value.enumerated.item[1] << 6;
+
+	spin_lock_irqsave(&chip->lock, flags);
+
+	left = (chip->image[CS4231_LEFT_INPUT] & ~CS4231_MIXS_ALL) | left;
+	right = (chip->image[CS4231_RIGHT_INPUT] & ~CS4231_MIXS_ALL) | right;
+	change = left != chip->image[CS4231_LEFT_INPUT] ||
+	         right != chip->image[CS4231_RIGHT_INPUT];
+	snd_cs4231_out(chip, CS4231_LEFT_INPUT, left);
+	snd_cs4231_out(chip, CS4231_RIGHT_INPUT, right);
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return change;
+}
+
+int snd_cs4231_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+
+	uinfo->type = (mask == 1) ?
+		SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = mask;
+
+	return 0;
+}
+
+int snd_cs4231_get_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	cs4231_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	
+	spin_lock_irqsave(&chip->lock, flags);
+
+	ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	if (invert)
+		ucontrol->value.integer.value[0] =
+			(mask - ucontrol->value.integer.value[0]);
+
+	return 0;
+}
+
+int snd_cs4231_put_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	cs4231_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	int change;
+	unsigned short val;
+	
+	val = (ucontrol->value.integer.value[0] & mask);
+	if (invert)
+		val = mask - val;
+	val <<= shift;
+
+	spin_lock_irqsave(&chip->lock, flags);
+
+	val = (chip->image[reg] & ~(mask << shift)) | val;
+	change = val != chip->image[reg];
+	snd_cs4231_out(chip, reg, val);
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return change;
+}
+
+int snd_cs4231_info_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+
+	uinfo->type = mask == 1 ?
+		SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = mask;
+
+	return 0;
+}
+
+int snd_cs4231_get_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	cs4231_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+	
+	spin_lock_irqsave(&chip->lock, flags);
+
+	ucontrol->value.integer.value[0] = (chip->image[left_reg] >> shift_left) & mask;
+	ucontrol->value.integer.value[1] = (chip->image[right_reg] >> shift_right) & mask;
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	if (invert) {
+		ucontrol->value.integer.value[0] =
+			(mask - ucontrol->value.integer.value[0]);
+		ucontrol->value.integer.value[1] =
+			(mask - ucontrol->value.integer.value[1]);
+	}
+
+	return 0;
+}
+
+int snd_cs4231_put_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	cs4231_t *chip = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+	int change;
+	unsigned short val1, val2;
+	
+	val1 = ucontrol->value.integer.value[0] & mask;
+	val2 = ucontrol->value.integer.value[1] & mask;
+	if (invert) {
+		val1 = mask - val1;
+		val2 = mask - val2;
+	}
+	val1 <<= shift_left;
+	val2 <<= shift_right;
+
+	spin_lock_irqsave(&chip->lock, flags);
+
+	val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
+	val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
+	change = val1 != chip->image[left_reg] || val2 != chip->image[right_reg];
+	snd_cs4231_out(chip, left_reg, val1);
+	snd_cs4231_out(chip, right_reg, val2);
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return change;
+}
+
+#define CS4231_SINGLE(xname, xindex, reg, shift, mask, invert) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
+  .info = snd_cs4231_info_single, \
+  .get = snd_cs4231_get_single, .put = snd_cs4231_put_single, \
+  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }
+
+#define CS4231_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
+  .info = snd_cs4231_info_double, \
+  .get = snd_cs4231_get_double, .put = snd_cs4231_put_double, \
+  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }
+
+static snd_kcontrol_new_t snd_cs4231_controls[] = {
+CS4231_DOUBLE("PCM Playback Switch", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
+CS4231_DOUBLE("PCM Playback Volume", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),
+CS4231_DOUBLE("Line Playback Switch", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
+CS4231_DOUBLE("Line Playback Volume", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),
+CS4231_DOUBLE("Aux Playback Switch", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
+CS4231_DOUBLE("Aux Playback Volume", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),
+CS4231_DOUBLE("Aux Playback Switch", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
+CS4231_DOUBLE("Aux Playback Volume", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),
+CS4231_SINGLE("Mono Playback Switch", 0, CS4231_MONO_CTRL, 7, 1, 1),
+CS4231_SINGLE("Mono Playback Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),
+CS4231_SINGLE("Mono Output Playback Switch", 0, CS4231_MONO_CTRL, 6, 1, 1),
+CS4231_SINGLE("Mono Output Playback Bypass", 0, CS4231_MONO_CTRL, 5, 1, 0),
+CS4231_DOUBLE("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 0, 0, 15, 0),
+{
+	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name	= "Capture Source",
+	.info	= snd_cs4231_info_mux,
+	.get	= snd_cs4231_get_mux,
+	.put	= snd_cs4231_put_mux,
+},
+CS4231_DOUBLE("Mic Boost", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 5, 5, 1, 0),
+CS4231_SINGLE("Loopback Capture Switch", 0, CS4231_LOOPBACK, 0, 1, 0),
+CS4231_SINGLE("Loopback Capture Volume", 0, CS4231_LOOPBACK, 2, 63, 1),
+/* SPARC specific uses of XCTL{0,1} general purpose outputs.  */
+CS4231_SINGLE("Line Out Switch", 0, CS4231_PIN_CTRL, 6, 1, 1),
+CS4231_SINGLE("Headphone Out Switch", 0, CS4231_PIN_CTRL, 7, 1, 1)
+};
+                                        
+int snd_cs4231_mixer(cs4231_t *chip)
+{
+	snd_card_t *card;
+	int err, idx;
+
+	snd_assert(chip != NULL && chip->pcm != NULL, return -EINVAL);
+
+	card = chip->card;
+
+	strcpy(card->mixername, chip->pcm->name);
+
+	for (idx = 0; idx < ARRAY_SIZE(snd_cs4231_controls); idx++) {
+		if ((err = snd_ctl_add(card,
+				       snd_ctl_new1(&snd_cs4231_controls[idx],
+						    chip))) < 0)
+			return err;
+	}
+	return 0;
+}
+
+static int dev;
+
+static int cs4231_attach_begin(snd_card_t **rcard)
+{
+	snd_card_t *card;
+
+	*rcard = NULL;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+	if (card == NULL)
+		return -ENOMEM;
+
+	strcpy(card->driver, "CS4231");
+	strcpy(card->shortname, "Sun CS4231");
+
+	*rcard = card;
+	return 0;
+}
+
+static int cs4231_attach_finish(snd_card_t *card, cs4231_t *chip)
+{
+	int err;
+
+	if ((err = snd_cs4231_pcm(chip)) < 0)
+		goto out_err;
+
+	if ((err = snd_cs4231_mixer(chip)) < 0)
+		goto out_err;
+
+	if ((err = snd_cs4231_timer(chip)) < 0)
+		goto out_err;
+
+	if ((err = snd_card_register(card)) < 0)
+		goto out_err;
+
+	chip->next = cs4231_list;
+	cs4231_list = chip;
+
+	dev++;
+	return 0;
+
+out_err:
+	snd_card_free(card);
+	return err;
+}
+
+#ifdef SBUS_SUPPORT
+static int snd_cs4231_sbus_free(cs4231_t *chip)
+{
+	if (chip->irq[0])
+		free_irq(chip->irq[0], chip);
+
+	if (chip->port)
+		sbus_iounmap(chip->port, chip->regs_size);
+
+	if (chip->timer)
+		snd_device_free(chip->card, chip->timer);
+
+	kfree(chip);
+
+	return 0;
+}
+
+static int snd_cs4231_sbus_dev_free(snd_device_t *device)
+{
+	cs4231_t *cp = device->device_data;
+
+	return snd_cs4231_sbus_free(cp);
+}
+
+static snd_device_ops_t snd_cs4231_sbus_dev_ops = {
+	.dev_free	=	snd_cs4231_sbus_dev_free,
+};
+
+static int __init snd_cs4231_sbus_create(snd_card_t *card,
+					 struct sbus_dev *sdev,
+					 int dev,
+					 cs4231_t **rchip)
+{
+	cs4231_t *chip;
+	int err;
+
+	*rchip = NULL;
+	chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
+	if (chip == NULL)
+		return -ENOMEM;
+
+	spin_lock_init(&chip->lock);
+	init_MUTEX(&chip->mce_mutex);
+	init_MUTEX(&chip->open_mutex);
+	chip->card = card;
+	chip->dev_u.sdev = sdev;
+	chip->regs_size = sdev->reg_addrs[0].reg_size;
+	memcpy(&chip->image, &snd_cs4231_original_image,
+	       sizeof(snd_cs4231_original_image));
+
+	chip->port = sbus_ioremap(&sdev->resource[0], 0,
+				  chip->regs_size, "cs4231");
+	if (!chip->port) {
+		snd_printk("cs4231-%d: Unable to map chip registers.\n", dev);
+		return -EIO;
+	}
+
+	if (request_irq(sdev->irqs[0], snd_cs4231_sbus_interrupt,
+			SA_SHIRQ, "cs4231", chip)) {
+		snd_printk("cs4231-%d: Unable to grab SBUS IRQ %s\n",
+			   dev,
+			   __irq_itoa(sdev->irqs[0]));
+		snd_cs4231_sbus_free(chip);
+		return -EBUSY;
+	}
+	chip->irq[0] = sdev->irqs[0];
+
+	if (snd_cs4231_probe(chip) < 0) {
+		snd_cs4231_sbus_free(chip);
+		return -ENODEV;
+	}
+	snd_cs4231_init(chip);
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
+				  chip, &snd_cs4231_sbus_dev_ops)) < 0) {
+		snd_cs4231_sbus_free(chip);
+		return err;
+	}
+
+	*rchip = chip;
+	return 0;
+}
+
+static int cs4231_sbus_attach(struct sbus_dev *sdev)
+{
+	struct resource *rp = &sdev->resource[0];
+	cs4231_t *cp;
+	snd_card_t *card;
+	int err;
+
+	err = cs4231_attach_begin(&card);
+	if (err)
+		return err;
+
+	sprintf(card->longname, "%s at 0x%02lx:0x%08lx, irq %s",
+		card->shortname,
+		rp->flags & 0xffL,
+		rp->start,
+		__irq_itoa(sdev->irqs[0]));
+
+	if ((err = snd_cs4231_sbus_create(card, sdev, dev, &cp)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	return cs4231_attach_finish(card, cp);
+}
+#endif
+
+#ifdef EBUS_SUPPORT
+static int snd_cs4231_ebus_free(cs4231_t *chip)
+{
+	if (chip->eb2c.regs) {
+		ebus_dma_unregister(&chip->eb2c);
+		iounmap(chip->eb2c.regs);
+	}
+	if (chip->eb2p.regs) {
+		ebus_dma_unregister(&chip->eb2p);
+		iounmap(chip->eb2p.regs);
+	}
+
+	if (chip->port)
+		iounmap(chip->port);
+	if (chip->timer)
+		snd_device_free(chip->card, chip->timer);
+
+	kfree(chip);
+
+	return 0;
+}
+
+static int snd_cs4231_ebus_dev_free(snd_device_t *device)
+{
+	cs4231_t *cp = device->device_data;
+
+	return snd_cs4231_ebus_free(cp);
+}
+
+static snd_device_ops_t snd_cs4231_ebus_dev_ops = {
+	.dev_free	=	snd_cs4231_ebus_dev_free,
+};
+
+static int __init snd_cs4231_ebus_create(snd_card_t *card,
+					 struct linux_ebus_device *edev,
+					 int dev,
+					 cs4231_t **rchip)
+{
+	cs4231_t *chip;
+	int err;
+
+	*rchip = NULL;
+	chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
+	if (chip == NULL)
+		return -ENOMEM;
+
+	spin_lock_init(&chip->lock);
+	spin_lock_init(&chip->eb2c.lock);
+	spin_lock_init(&chip->eb2p.lock);
+	init_MUTEX(&chip->mce_mutex);
+	init_MUTEX(&chip->open_mutex);
+	chip->flags |= CS4231_FLAG_EBUS;
+	chip->card = card;
+	chip->dev_u.pdev = edev->bus->self;
+	memcpy(&chip->image, &snd_cs4231_original_image,
+	       sizeof(snd_cs4231_original_image));
+	strcpy(chip->eb2c.name, "cs4231(capture)");
+	chip->eb2c.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
+	chip->eb2c.callback = snd_cs4231_ebus_capture_callback;
+	chip->eb2c.client_cookie = chip;
+	chip->eb2c.irq = edev->irqs[0];
+	strcpy(chip->eb2p.name, "cs4231(play)");
+	chip->eb2p.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
+	chip->eb2p.callback = snd_cs4231_ebus_play_callback;
+	chip->eb2p.client_cookie = chip;
+	chip->eb2p.irq = edev->irqs[1];
+
+	chip->port = ioremap(edev->resource[0].start, 0x10);
+	chip->eb2p.regs = ioremap(edev->resource[1].start, 0x10);
+	chip->eb2c.regs = ioremap(edev->resource[2].start, 0x10);
+	if (!chip->port || !chip->eb2p.regs || !chip->eb2c.regs) {
+		snd_cs4231_ebus_free(chip);
+		snd_printk("cs4231-%d: Unable to map chip registers.\n", dev);
+		return -EIO;
+	}
+
+	if (ebus_dma_register(&chip->eb2c)) {
+		snd_cs4231_ebus_free(chip);
+		snd_printk("cs4231-%d: Unable to register EBUS capture DMA\n", dev);
+		return -EBUSY;
+	}
+	if (ebus_dma_irq_enable(&chip->eb2c, 1)) {
+		snd_cs4231_ebus_free(chip);
+		snd_printk("cs4231-%d: Unable to enable EBUS capture IRQ\n", dev);
+		return -EBUSY;
+	}
+
+	if (ebus_dma_register(&chip->eb2p)) {
+		snd_cs4231_ebus_free(chip);
+		snd_printk("cs4231-%d: Unable to register EBUS play DMA\n", dev);
+		return -EBUSY;
+	}
+	if (ebus_dma_irq_enable(&chip->eb2p, 1)) {
+		snd_cs4231_ebus_free(chip);
+		snd_printk("cs4231-%d: Unable to enable EBUS play IRQ\n", dev);
+		return -EBUSY;
+	}
+
+	if (snd_cs4231_probe(chip) < 0) {
+		snd_cs4231_ebus_free(chip);
+		return -ENODEV;
+	}
+	snd_cs4231_init(chip);
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
+				  chip, &snd_cs4231_ebus_dev_ops)) < 0) {
+		snd_cs4231_ebus_free(chip);
+		return err;
+	}
+
+	*rchip = chip;
+	return 0;
+}
+
+static int cs4231_ebus_attach(struct linux_ebus_device *edev)
+{
+	snd_card_t *card;
+	cs4231_t *chip;
+	int err;
+
+	err = cs4231_attach_begin(&card);
+	if (err)
+		return err;
+
+	sprintf(card->longname, "%s at 0x%lx, irq %s",
+		card->shortname,
+		edev->resource[0].start,
+		__irq_itoa(edev->irqs[0]));
+
+	if ((err = snd_cs4231_ebus_create(card, edev, dev, &chip)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	return cs4231_attach_finish(card, chip);
+}
+#endif
+
+static int __init cs4231_init(void)
+{
+#ifdef SBUS_SUPPORT
+	struct sbus_bus *sbus;
+	struct sbus_dev *sdev;
+#endif
+#ifdef EBUS_SUPPORT
+	struct linux_ebus *ebus;
+	struct linux_ebus_device *edev;
+#endif
+	int found;
+
+	found = 0;
+
+#ifdef SBUS_SUPPORT
+	for_all_sbusdev(sdev, sbus) {
+		if (!strcmp(sdev->prom_name, "SUNW,CS4231")) {
+			if (cs4231_sbus_attach(sdev) == 0)
+				found++;
+		}
+	}
+#endif
+#ifdef EBUS_SUPPORT
+	for_each_ebus(ebus) {
+		for_each_ebusdev(edev, ebus) {
+			int match = 0;
+
+			if (!strcmp(edev->prom_name, "SUNW,CS4231")) {
+				match = 1;
+			} else if (!strcmp(edev->prom_name, "audio")) {
+				char compat[16];
+
+				prom_getstring(edev->prom_node, "compatible",
+					       compat, sizeof(compat));
+				compat[15] = '\0';
+				if (!strcmp(compat, "SUNW,CS4231"))
+					match = 1;
+			}
+
+			if (match &&
+			    cs4231_ebus_attach(edev) == 0)
+				found++;
+		}
+	}
+#endif
+
+
+	return (found > 0) ? 0 : -EIO;
+}
+
+static void __exit cs4231_exit(void)
+{
+	cs4231_t *p = cs4231_list;
+
+	while (p != NULL) {
+		cs4231_t *next = p->next;
+
+		snd_card_free(p->card);
+
+		p = next;
+	}
+
+	cs4231_list = NULL;
+}
+
+module_init(cs4231_init);
+module_exit(cs4231_exit);