/*
 *  Driver for S3 SonicVibes soundcard
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *  BUGS:
 *    It looks like 86c617 rev 3 doesn't supports DDMA buffers above 16MB?
 *    Driver sometimes hangs... Nobody knows why at this moment...
 *
 *   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/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/gameport.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/info.h>
#include <sound/control.h>
#include <sound/mpu401.h>
#include <sound/opl3.h>
#include <sound/initval.h>

#include <asm/io.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("S3 SonicVibes PCI");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{S3,SonicVibes PCI}}");

#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
#define SUPPORT_JOYSTICK 1
#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 */
static int reverb[SNDRV_CARDS];
static int mge[SNDRV_CARDS];
static unsigned int dmaio = 0x7a00;	/* DDMA i/o address */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for S3 SonicVibes soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for S3 SonicVibes soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable S3 SonicVibes soundcard.");
module_param_array(reverb, bool, NULL, 0444);
MODULE_PARM_DESC(reverb, "Enable reverb (SRAM is present) for S3 SonicVibes soundcard.");
module_param_array(mge, bool, NULL, 0444);
MODULE_PARM_DESC(mge, "MIC Gain Enable for S3 SonicVibes soundcard.");
module_param(dmaio, uint, 0444);
MODULE_PARM_DESC(dmaio, "DDMA i/o base address for S3 SonicVibes soundcard.");

/*
 * Enhanced port direct registers
 */

#define SV_REG(sonic, x) ((sonic)->enh_port + SV_REG_##x)

#define SV_REG_CONTROL	0x00	/* R/W: CODEC/Mixer control register */
#define   SV_ENHANCED	  0x01	/* audio mode select - enhanced mode */
#define   SV_TEST	  0x02	/* test bit */
#define   SV_REVERB	  0x04	/* reverb enable */
#define   SV_WAVETABLE	  0x08	/* wavetable active / FM active if not set */
#define   SV_INTA	  0x20	/* INTA driving - should be always 1 */
#define   SV_RESET	  0x80	/* reset chip */
#define SV_REG_IRQMASK	0x01	/* R/W: CODEC/Mixer interrupt mask register */
#define   SV_DMAA_MASK	  0x01	/* mask DMA-A interrupt */
#define   SV_DMAC_MASK	  0x04	/* mask DMA-C interrupt */
#define   SV_SPEC_MASK	  0x08	/* special interrupt mask - should be always masked */
#define   SV_UD_MASK	  0x40	/* Up/Down button interrupt mask */
#define   SV_MIDI_MASK	  0x80	/* mask MIDI interrupt */
#define SV_REG_STATUS	0x02	/* R/O: CODEC/Mixer status register */
#define   SV_DMAA_IRQ	  0x01	/* DMA-A interrupt */
#define   SV_DMAC_IRQ	  0x04	/* DMA-C interrupt */
#define   SV_SPEC_IRQ	  0x08	/* special interrupt */
#define   SV_UD_IRQ	  0x40	/* Up/Down interrupt */
#define   SV_MIDI_IRQ	  0x80	/* MIDI interrupt */
#define SV_REG_INDEX	0x04	/* R/W: CODEC/Mixer index address register */
#define   SV_MCE          0x40	/* mode change enable */
#define   SV_TRD	  0x80	/* DMA transfer request disabled */
#define SV_REG_DATA	0x05	/* R/W: CODEC/Mixer index data register */

/*
 * Enhanced port indirect registers
 */

#define SV_IREG_LEFT_ADC	0x00	/* Left ADC Input Control */
#define SV_IREG_RIGHT_ADC	0x01	/* Right ADC Input Control */
#define SV_IREG_LEFT_AUX1	0x02	/* Left AUX1 Input Control */
#define SV_IREG_RIGHT_AUX1	0x03	/* Right AUX1 Input Control */
#define SV_IREG_LEFT_CD		0x04	/* Left CD Input Control */
#define SV_IREG_RIGHT_CD	0x05	/* Right CD Input Control */
#define SV_IREG_LEFT_LINE	0x06	/* Left Line Input Control */
#define SV_IREG_RIGHT_LINE	0x07	/* Right Line Input Control */
#define SV_IREG_MIC		0x08	/* MIC Input Control */
#define SV_IREG_GAME_PORT	0x09	/* Game Port Control */
#define SV_IREG_LEFT_SYNTH	0x0a	/* Left Synth Input Control */
#define SV_IREG_RIGHT_SYNTH	0x0b	/* Right Synth Input Control */
#define SV_IREG_LEFT_AUX2	0x0c	/* Left AUX2 Input Control */
#define SV_IREG_RIGHT_AUX2	0x0d	/* Right AUX2 Input Control */
#define SV_IREG_LEFT_ANALOG	0x0e	/* Left Analog Mixer Output Control */
#define SV_IREG_RIGHT_ANALOG	0x0f	/* Right Analog Mixer Output Control */
#define SV_IREG_LEFT_PCM	0x10	/* Left PCM Input Control */
#define SV_IREG_RIGHT_PCM	0x11	/* Right PCM Input Control */
#define SV_IREG_DMA_DATA_FMT	0x12	/* DMA Data Format */
#define SV_IREG_PC_ENABLE	0x13	/* Playback/Capture Enable Register */
#define SV_IREG_UD_BUTTON	0x14	/* Up/Down Button Register */
#define SV_IREG_REVISION	0x15	/* Revision */
#define SV_IREG_ADC_OUTPUT_CTRL	0x16	/* ADC Output Control */
#define SV_IREG_DMA_A_UPPER	0x18	/* DMA A Upper Base Count */
#define SV_IREG_DMA_A_LOWER	0x19	/* DMA A Lower Base Count */
#define SV_IREG_DMA_C_UPPER	0x1c	/* DMA C Upper Base Count */
#define SV_IREG_DMA_C_LOWER	0x1d	/* DMA C Lower Base Count */
#define SV_IREG_PCM_RATE_LOW	0x1e	/* PCM Sampling Rate Low Byte */
#define SV_IREG_PCM_RATE_HIGH	0x1f	/* PCM Sampling Rate High Byte */
#define SV_IREG_SYNTH_RATE_LOW	0x20	/* Synthesizer Sampling Rate Low Byte */
#define SV_IREG_SYNTH_RATE_HIGH 0x21	/* Synthesizer Sampling Rate High Byte */
#define SV_IREG_ADC_CLOCK	0x22	/* ADC Clock Source Selection */
#define SV_IREG_ADC_ALT_RATE	0x23	/* ADC Alternative Sampling Rate Selection */
#define SV_IREG_ADC_PLL_M	0x24	/* ADC PLL M Register */
#define SV_IREG_ADC_PLL_N	0x25	/* ADC PLL N Register */
#define SV_IREG_SYNTH_PLL_M	0x26	/* Synthesizer PLL M Register */
#define SV_IREG_SYNTH_PLL_N	0x27	/* Synthesizer PLL N Register */
#define SV_IREG_MPU401		0x2a	/* MPU-401 UART Operation */
#define SV_IREG_DRIVE_CTRL	0x2b	/* Drive Control */
#define SV_IREG_SRS_SPACE	0x2c	/* SRS Space Control */
#define SV_IREG_SRS_CENTER	0x2d	/* SRS Center Control */
#define SV_IREG_WAVE_SOURCE	0x2e	/* Wavetable Sample Source Select */
#define SV_IREG_ANALOG_POWER	0x30	/* Analog Power Down Control */
#define SV_IREG_DIGITAL_POWER	0x31	/* Digital Power Down Control */

#define SV_IREG_ADC_PLL		SV_IREG_ADC_PLL_M
#define SV_IREG_SYNTH_PLL	SV_IREG_SYNTH_PLL_M

/*
 *  DMA registers
 */

#define SV_DMA_ADDR0		0x00
#define SV_DMA_ADDR1		0x01
#define SV_DMA_ADDR2		0x02
#define SV_DMA_ADDR3		0x03
#define SV_DMA_COUNT0		0x04
#define SV_DMA_COUNT1		0x05
#define SV_DMA_COUNT2		0x06
#define SV_DMA_MODE		0x0b
#define SV_DMA_RESET		0x0d
#define SV_DMA_MASK		0x0f

/*
 *  Record sources
 */

#define SV_RECSRC_RESERVED	(0x00<<5)
#define SV_RECSRC_CD		(0x01<<5)
#define SV_RECSRC_DAC		(0x02<<5)
#define SV_RECSRC_AUX2		(0x03<<5)
#define SV_RECSRC_LINE		(0x04<<5)
#define SV_RECSRC_AUX1		(0x05<<5)
#define SV_RECSRC_MIC		(0x06<<5)
#define SV_RECSRC_OUT		(0x07<<5)

/*
 *  constants
 */

#define SV_FULLRATE		48000
#define SV_REFFREQUENCY		24576000
#define SV_ADCMULT		512

#define SV_MODE_PLAY		1
#define SV_MODE_CAPTURE		2

/*

 */

struct sonicvibes {
	unsigned long dma1size;
	unsigned long dma2size;
	int irq;

	unsigned long sb_port;
	unsigned long enh_port;
	unsigned long synth_port;
	unsigned long midi_port;
	unsigned long game_port;
	unsigned int dmaa_port;
	struct resource *res_dmaa;
	unsigned int dmac_port;
	struct resource *res_dmac;

	unsigned char enable;
	unsigned char irqmask;
	unsigned char revision;
	unsigned char format;
	unsigned char srs_space;
	unsigned char srs_center;
	unsigned char mpu_switch;
	unsigned char wave_source;

	unsigned int mode;

	struct pci_dev *pci;
	struct snd_card *card;
	struct snd_pcm *pcm;
	struct snd_pcm_substream *playback_substream;
	struct snd_pcm_substream *capture_substream;
	struct snd_rawmidi *rmidi;
	struct snd_hwdep *fmsynth;	/* S3FM */

	spinlock_t reg_lock;

	unsigned int p_dma_size;
	unsigned int c_dma_size;

	struct snd_kcontrol *master_mute;
	struct snd_kcontrol *master_volume;

#ifdef SUPPORT_JOYSTICK
	struct gameport *gameport;
#endif
};

static struct pci_device_id snd_sonic_ids[] = {
	{ 0x5333, 0xca00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
        { 0, }
};

MODULE_DEVICE_TABLE(pci, snd_sonic_ids);

static struct snd_ratden sonicvibes_adc_clock = {
	.num_min = 4000 * 65536,
	.num_max = 48000UL * 65536,
	.num_step = 1,
	.den = 65536,
};
static struct snd_pcm_hw_constraint_ratdens snd_sonicvibes_hw_constraints_adc_clock = {
	.nrats = 1,
	.rats = &sonicvibes_adc_clock,
};

/*
 *  common I/O routines
 */

static inline void snd_sonicvibes_setdmaa(struct sonicvibes * sonic,
					  unsigned int addr,
					  unsigned int count)
{
	count--;
	outl(addr, sonic->dmaa_port + SV_DMA_ADDR0);
	outl(count, sonic->dmaa_port + SV_DMA_COUNT0);
	outb(0x18, sonic->dmaa_port + SV_DMA_MODE);
#if 0
	printk("program dmaa: addr = 0x%x, paddr = 0x%x\n", addr, inl(sonic->dmaa_port + SV_DMA_ADDR0));
#endif
}

static inline void snd_sonicvibes_setdmac(struct sonicvibes * sonic,
					  unsigned int addr,
					  unsigned int count)
{
	/* note: dmac is working in word mode!!! */
	count >>= 1;
	count--;
	outl(addr, sonic->dmac_port + SV_DMA_ADDR0);
	outl(count, sonic->dmac_port + SV_DMA_COUNT0);
	outb(0x14, sonic->dmac_port + SV_DMA_MODE);
#if 0
	printk("program dmac: addr = 0x%x, paddr = 0x%x\n", addr, inl(sonic->dmac_port + SV_DMA_ADDR0));
#endif
}

static inline unsigned int snd_sonicvibes_getdmaa(struct sonicvibes * sonic)
{
	return (inl(sonic->dmaa_port + SV_DMA_COUNT0) & 0xffffff) + 1;
}

static inline unsigned int snd_sonicvibes_getdmac(struct sonicvibes * sonic)
{
	/* note: dmac is working in word mode!!! */
	return ((inl(sonic->dmac_port + SV_DMA_COUNT0) & 0xffffff) + 1) << 1;
}

static void snd_sonicvibes_out1(struct sonicvibes * sonic,
				unsigned char reg,
				unsigned char value)
{
	outb(reg, SV_REG(sonic, INDEX));
	udelay(10);
	outb(value, SV_REG(sonic, DATA));
	udelay(10);
}

static void snd_sonicvibes_out(struct sonicvibes * sonic,
			       unsigned char reg,
			       unsigned char value)
{
	unsigned long flags;

	spin_lock_irqsave(&sonic->reg_lock, flags);
	outb(reg, SV_REG(sonic, INDEX));
	udelay(10);
	outb(value, SV_REG(sonic, DATA));
	udelay(10);
	spin_unlock_irqrestore(&sonic->reg_lock, flags);
}

static unsigned char snd_sonicvibes_in1(struct sonicvibes * sonic, unsigned char reg)
{
	unsigned char value;

	outb(reg, SV_REG(sonic, INDEX));
	udelay(10);
	value = inb(SV_REG(sonic, DATA));
	udelay(10);
	return value;
}

static unsigned char snd_sonicvibes_in(struct sonicvibes * sonic, unsigned char reg)
{
	unsigned long flags;
	unsigned char value;

	spin_lock_irqsave(&sonic->reg_lock, flags);
	outb(reg, SV_REG(sonic, INDEX));
	udelay(10);
	value = inb(SV_REG(sonic, DATA));
	udelay(10);
	spin_unlock_irqrestore(&sonic->reg_lock, flags);
	return value;
}

#if 0
static void snd_sonicvibes_debug(struct sonicvibes * sonic)
{
	printk("SV REGS:          INDEX = 0x%02x  ", inb(SV_REG(sonic, INDEX)));
	printk("                 STATUS = 0x%02x\n", inb(SV_REG(sonic, STATUS)));
	printk("  0x00: left input      = 0x%02x  ", snd_sonicvibes_in(sonic, 0x00));
	printk("  0x20: synth rate low  = 0x%02x\n", snd_sonicvibes_in(sonic, 0x20));
	printk("  0x01: right input     = 0x%02x  ", snd_sonicvibes_in(sonic, 0x01));
	printk("  0x21: synth rate high = 0x%02x\n", snd_sonicvibes_in(sonic, 0x21));
	printk("  0x02: left AUX1       = 0x%02x  ", snd_sonicvibes_in(sonic, 0x02));
	printk("  0x22: ADC clock       = 0x%02x\n", snd_sonicvibes_in(sonic, 0x22));
	printk("  0x03: right AUX1      = 0x%02x  ", snd_sonicvibes_in(sonic, 0x03));
	printk("  0x23: ADC alt rate    = 0x%02x\n", snd_sonicvibes_in(sonic, 0x23));
	printk("  0x04: left CD         = 0x%02x  ", snd_sonicvibes_in(sonic, 0x04));
	printk("  0x24: ADC pll M       = 0x%02x\n", snd_sonicvibes_in(sonic, 0x24));
	printk("  0x05: right CD        = 0x%02x  ", snd_sonicvibes_in(sonic, 0x05));
	printk("  0x25: ADC pll N       = 0x%02x\n", snd_sonicvibes_in(sonic, 0x25));
	printk("  0x06: left line       = 0x%02x  ", snd_sonicvibes_in(sonic, 0x06));
	printk("  0x26: Synth pll M     = 0x%02x\n", snd_sonicvibes_in(sonic, 0x26));
	printk("  0x07: right line      = 0x%02x  ", snd_sonicvibes_in(sonic, 0x07));
	printk("  0x27: Synth pll N     = 0x%02x\n", snd_sonicvibes_in(sonic, 0x27));
	printk("  0x08: MIC             = 0x%02x  ", snd_sonicvibes_in(sonic, 0x08));
	printk("  0x28: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x28));
	printk("  0x09: Game port       = 0x%02x  ", snd_sonicvibes_in(sonic, 0x09));
	printk("  0x29: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x29));
	printk("  0x0a: left synth      = 0x%02x  ", snd_sonicvibes_in(sonic, 0x0a));
	printk("  0x2a: MPU401          = 0x%02x\n", snd_sonicvibes_in(sonic, 0x2a));
	printk("  0x0b: right synth     = 0x%02x  ", snd_sonicvibes_in(sonic, 0x0b));
	printk("  0x2b: drive ctrl      = 0x%02x\n", snd_sonicvibes_in(sonic, 0x2b));
	printk("  0x0c: left AUX2       = 0x%02x  ", snd_sonicvibes_in(sonic, 0x0c));
	printk("  0x2c: SRS space       = 0x%02x\n", snd_sonicvibes_in(sonic, 0x2c));
	printk("  0x0d: right AUX2      = 0x%02x  ", snd_sonicvibes_in(sonic, 0x0d));
	printk("  0x2d: SRS center      = 0x%02x\n", snd_sonicvibes_in(sonic, 0x2d));
	printk("  0x0e: left analog     = 0x%02x  ", snd_sonicvibes_in(sonic, 0x0e));
	printk("  0x2e: wave source     = 0x%02x\n", snd_sonicvibes_in(sonic, 0x2e));
	printk("  0x0f: right analog    = 0x%02x  ", snd_sonicvibes_in(sonic, 0x0f));
	printk("  0x2f: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x2f));
	printk("  0x10: left PCM        = 0x%02x  ", snd_sonicvibes_in(sonic, 0x10));
	printk("  0x30: analog power    = 0x%02x\n", snd_sonicvibes_in(sonic, 0x30));
	printk("  0x11: right PCM       = 0x%02x  ", snd_sonicvibes_in(sonic, 0x11));
	printk("  0x31: analog power    = 0x%02x\n", snd_sonicvibes_in(sonic, 0x31));
	printk("  0x12: DMA data format = 0x%02x  ", snd_sonicvibes_in(sonic, 0x12));
	printk("  0x32: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x32));
	printk("  0x13: P/C enable      = 0x%02x  ", snd_sonicvibes_in(sonic, 0x13));
	printk("  0x33: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x33));
	printk("  0x14: U/D button      = 0x%02x  ", snd_sonicvibes_in(sonic, 0x14));
	printk("  0x34: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x34));
	printk("  0x15: revision        = 0x%02x  ", snd_sonicvibes_in(sonic, 0x15));
	printk("  0x35: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x35));
	printk("  0x16: ADC output ctrl = 0x%02x  ", snd_sonicvibes_in(sonic, 0x16));
	printk("  0x36: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x36));
	printk("  0x17: ---             = 0x%02x  ", snd_sonicvibes_in(sonic, 0x17));
	printk("  0x37: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x37));
	printk("  0x18: DMA A upper cnt = 0x%02x  ", snd_sonicvibes_in(sonic, 0x18));
	printk("  0x38: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x38));
	printk("  0x19: DMA A lower cnt = 0x%02x  ", snd_sonicvibes_in(sonic, 0x19));
	printk("  0x39: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x39));
	printk("  0x1a: ---             = 0x%02x  ", snd_sonicvibes_in(sonic, 0x1a));
	printk("  0x3a: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x3a));
	printk("  0x1b: ---             = 0x%02x  ", snd_sonicvibes_in(sonic, 0x1b));
	printk("  0x3b: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x3b));
	printk("  0x1c: DMA C upper cnt = 0x%02x  ", snd_sonicvibes_in(sonic, 0x1c));
	printk("  0x3c: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x3c));
	printk("  0x1d: DMA C upper cnt = 0x%02x  ", snd_sonicvibes_in(sonic, 0x1d));
	printk("  0x3d: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x3d));
	printk("  0x1e: PCM rate low    = 0x%02x  ", snd_sonicvibes_in(sonic, 0x1e));
	printk("  0x3e: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x3e));
	printk("  0x1f: PCM rate high   = 0x%02x  ", snd_sonicvibes_in(sonic, 0x1f));
	printk("  0x3f: ---             = 0x%02x\n", snd_sonicvibes_in(sonic, 0x3f));
}

#endif

static void snd_sonicvibes_setfmt(struct sonicvibes * sonic,
                                  unsigned char mask,
                                  unsigned char value)
{
	unsigned long flags;

	spin_lock_irqsave(&sonic->reg_lock, flags);
	outb(SV_MCE | SV_IREG_DMA_DATA_FMT, SV_REG(sonic, INDEX));
	if (mask) {
		sonic->format = inb(SV_REG(sonic, DATA));
		udelay(10);
	}
	sonic->format = (sonic->format & mask) | value;
	outb(sonic->format, SV_REG(sonic, DATA));
	udelay(10);
	outb(0, SV_REG(sonic, INDEX));
	udelay(10);
	spin_unlock_irqrestore(&sonic->reg_lock, flags);
}

static void snd_sonicvibes_pll(unsigned int rate,
			       unsigned int *res_r,
			       unsigned int *res_m,
			       unsigned int *res_n)
{
	unsigned int r, m = 0, n = 0;
	unsigned int xm, xn, xr, xd, metric = ~0U;

	if (rate < 625000 / SV_ADCMULT)
		rate = 625000 / SV_ADCMULT;
	if (rate > 150000000 / SV_ADCMULT)
		rate = 150000000 / SV_ADCMULT;
	/* slight violation of specs, needed for continuous sampling rates */
	for (r = 0; rate < 75000000 / SV_ADCMULT; r += 0x20, rate <<= 1);
	for (xn = 3; xn < 33; xn++)	/* 35 */
		for (xm = 3; xm < 257; xm++) {
			xr = ((SV_REFFREQUENCY / SV_ADCMULT) * xm) / xn;
			if (xr >= rate)
				xd = xr - rate;
			else
				xd = rate - xr;
			if (xd < metric) {
				metric = xd;
				m = xm - 2;
				n = xn - 2;
			}
		}
	*res_r = r;
	*res_m = m;
	*res_n = n;
#if 0
	printk("metric = %i, xm = %i, xn = %i\n", metric, xm, xn);
	printk("pll: m = 0x%x, r = 0x%x, n = 0x%x\n", reg, m, r, n);
#endif
}

static void snd_sonicvibes_setpll(struct sonicvibes * sonic,
                                  unsigned char reg,
                                  unsigned int rate)
{
	unsigned long flags;
	unsigned int r, m, n;

	snd_sonicvibes_pll(rate, &r, &m, &n);
	if (sonic != NULL) {
		spin_lock_irqsave(&sonic->reg_lock, flags);
		snd_sonicvibes_out1(sonic, reg, m);
		snd_sonicvibes_out1(sonic, reg + 1, r | n);
		spin_unlock_irqrestore(&sonic->reg_lock, flags);
	}
}

static void snd_sonicvibes_set_adc_rate(struct sonicvibes * sonic, unsigned int rate)
{
	unsigned long flags;
	unsigned int div;
	unsigned char clock;

	div = 48000 / rate;
	if (div > 8)
		div = 8;
	if ((48000 / div) == rate) {	/* use the alternate clock */
		clock = 0x10;
	} else {			/* use the PLL source */
		clock = 0x00;
		snd_sonicvibes_setpll(sonic, SV_IREG_ADC_PLL, rate);
	}
	spin_lock_irqsave(&sonic->reg_lock, flags);
	snd_sonicvibes_out1(sonic, SV_IREG_ADC_ALT_RATE, (div - 1) << 4);
	snd_sonicvibes_out1(sonic, SV_IREG_ADC_CLOCK, clock);
	spin_unlock_irqrestore(&sonic->reg_lock, flags);
}

static int snd_sonicvibes_hw_constraint_dac_rate(struct snd_pcm_hw_params *params,
						 struct snd_pcm_hw_rule *rule)
{
	unsigned int rate, div, r, m, n;

	if (hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min == 
	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max) {
		rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min;
		div = 48000 / rate;
		if (div > 8)
			div = 8;
		if ((48000 / div) == rate) {
			params->rate_num = rate;
			params->rate_den = 1;
		} else {
			snd_sonicvibes_pll(rate, &r, &m, &n);
			snd_assert((SV_REFFREQUENCY % 16) == 0, return -EINVAL);
			snd_assert((SV_ADCMULT % 512) == 0, return -EINVAL);
			params->rate_num = (SV_REFFREQUENCY/16) * (n+2) * r;
			params->rate_den = (SV_ADCMULT/512) * (m+2);
		}
	}
	return 0;
}

static void snd_sonicvibes_set_dac_rate(struct sonicvibes * sonic, unsigned int rate)
{
	unsigned int div;
	unsigned long flags;

	div = (rate * 65536 + SV_FULLRATE / 2) / SV_FULLRATE;
	if (div > 65535)
		div = 65535;
	spin_lock_irqsave(&sonic->reg_lock, flags);
	snd_sonicvibes_out1(sonic, SV_IREG_PCM_RATE_HIGH, div >> 8);
	snd_sonicvibes_out1(sonic, SV_IREG_PCM_RATE_LOW, div);
	spin_unlock_irqrestore(&sonic->reg_lock, flags);
}

static int snd_sonicvibes_trigger(struct sonicvibes * sonic, int what, int cmd)
{
	int result = 0;

	spin_lock(&sonic->reg_lock);
	if (cmd == SNDRV_PCM_TRIGGER_START) {
		if (!(sonic->enable & what)) {
			sonic->enable |= what;
			snd_sonicvibes_out1(sonic, SV_IREG_PC_ENABLE, sonic->enable);
		}
	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
		if (sonic->enable & what) {
			sonic->enable &= ~what;
			snd_sonicvibes_out1(sonic, SV_IREG_PC_ENABLE, sonic->enable);
		}
	} else {
		result = -EINVAL;
	}
	spin_unlock(&sonic->reg_lock);
	return result;
}

static irqreturn_t snd_sonicvibes_interrupt(int irq, void *dev_id)
{
	struct sonicvibes *sonic = dev_id;
	unsigned char status;

	status = inb(SV_REG(sonic, STATUS));
	if (!(status & (SV_DMAA_IRQ | SV_DMAC_IRQ | SV_MIDI_IRQ)))
		return IRQ_NONE;
	if (status == 0xff) {	/* failure */
		outb(sonic->irqmask = ~0, SV_REG(sonic, IRQMASK));
		snd_printk(KERN_ERR "IRQ failure - interrupts disabled!!\n");
		return IRQ_HANDLED;
	}
	if (sonic->pcm) {
		if (status & SV_DMAA_IRQ)
			snd_pcm_period_elapsed(sonic->playback_substream);
		if (status & SV_DMAC_IRQ)
			snd_pcm_period_elapsed(sonic->capture_substream);
	}
	if (sonic->rmidi) {
		if (status & SV_MIDI_IRQ)
			snd_mpu401_uart_interrupt(irq, sonic->rmidi->private_data);
	}
	if (status & SV_UD_IRQ) {
		unsigned char udreg;
		int vol, oleft, oright, mleft, mright;

		spin_lock(&sonic->reg_lock);
		udreg = snd_sonicvibes_in1(sonic, SV_IREG_UD_BUTTON);
		vol = udreg & 0x3f;
		if (!(udreg & 0x40))
			vol = -vol;
		oleft = mleft = snd_sonicvibes_in1(sonic, SV_IREG_LEFT_ANALOG);
		oright = mright = snd_sonicvibes_in1(sonic, SV_IREG_RIGHT_ANALOG);
		oleft &= 0x1f;
		oright &= 0x1f;
		oleft += vol;
		if (oleft < 0)
			oleft = 0;
		if (oleft > 0x1f)
			oleft = 0x1f;
		oright += vol;
		if (oright < 0)
			oright = 0;
		if (oright > 0x1f)
			oright = 0x1f;
		if (udreg & 0x80) {
			mleft ^= 0x80;
			mright ^= 0x80;
		}
		oleft |= mleft & 0x80;
		oright |= mright & 0x80;
		snd_sonicvibes_out1(sonic, SV_IREG_LEFT_ANALOG, oleft);
		snd_sonicvibes_out1(sonic, SV_IREG_RIGHT_ANALOG, oright);
		spin_unlock(&sonic->reg_lock);
		snd_ctl_notify(sonic->card, SNDRV_CTL_EVENT_MASK_VALUE, &sonic->master_mute->id);
		snd_ctl_notify(sonic->card, SNDRV_CTL_EVENT_MASK_VALUE, &sonic->master_volume->id);
	}
	return IRQ_HANDLED;
}

/*
 *  PCM part
 */

static int snd_sonicvibes_playback_trigger(struct snd_pcm_substream *substream,
					   int cmd)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	return snd_sonicvibes_trigger(sonic, 1, cmd);
}

static int snd_sonicvibes_capture_trigger(struct snd_pcm_substream *substream,
					  int cmd)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	return snd_sonicvibes_trigger(sonic, 2, cmd);
}

static int snd_sonicvibes_hw_params(struct snd_pcm_substream *substream,
				    struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
}

static int snd_sonicvibes_hw_free(struct snd_pcm_substream *substream)
{
	return snd_pcm_lib_free_pages(substream);
}

static int snd_sonicvibes_playback_prepare(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned char fmt = 0;
	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
	unsigned int count = snd_pcm_lib_period_bytes(substream);

	sonic->p_dma_size = size;
	count--;
	if (runtime->channels > 1)
		fmt |= 1;
	if (snd_pcm_format_width(runtime->format) == 16)
		fmt |= 2;
	snd_sonicvibes_setfmt(sonic, ~3, fmt);
	snd_sonicvibes_set_dac_rate(sonic, runtime->rate);
	spin_lock_irq(&sonic->reg_lock);
	snd_sonicvibes_setdmaa(sonic, runtime->dma_addr, size);
	snd_sonicvibes_out1(sonic, SV_IREG_DMA_A_UPPER, count >> 8);
	snd_sonicvibes_out1(sonic, SV_IREG_DMA_A_LOWER, count);
	spin_unlock_irq(&sonic->reg_lock);
	return 0;
}

static int snd_sonicvibes_capture_prepare(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned char fmt = 0;
	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
	unsigned int count = snd_pcm_lib_period_bytes(substream);

	sonic->c_dma_size = size;
	count >>= 1;
	count--;
	if (runtime->channels > 1)
		fmt |= 0x10;
	if (snd_pcm_format_width(runtime->format) == 16)
		fmt |= 0x20;
	snd_sonicvibes_setfmt(sonic, ~0x30, fmt);
	snd_sonicvibes_set_adc_rate(sonic, runtime->rate);
	spin_lock_irq(&sonic->reg_lock);
	snd_sonicvibes_setdmac(sonic, runtime->dma_addr, size);
	snd_sonicvibes_out1(sonic, SV_IREG_DMA_C_UPPER, count >> 8);
	snd_sonicvibes_out1(sonic, SV_IREG_DMA_C_LOWER, count);
	spin_unlock_irq(&sonic->reg_lock);
	return 0;
}

static snd_pcm_uframes_t snd_sonicvibes_playback_pointer(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	size_t ptr;

	if (!(sonic->enable & 1))
		return 0;
	ptr = sonic->p_dma_size - snd_sonicvibes_getdmaa(sonic);
	return bytes_to_frames(substream->runtime, ptr);
}

static snd_pcm_uframes_t snd_sonicvibes_capture_pointer(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	size_t ptr;
	if (!(sonic->enable & 2))
		return 0;
	ptr = sonic->c_dma_size - snd_sonicvibes_getdmac(sonic);
	return bytes_to_frames(substream->runtime, ptr);
}

static struct snd_pcm_hardware snd_sonicvibes_playback =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	32,
	.period_bytes_max =	(128*1024),
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

static struct snd_pcm_hardware snd_sonicvibes_capture =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	32,
	.period_bytes_max =	(128*1024),
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

static int snd_sonicvibes_playback_open(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;

	sonic->mode |= SV_MODE_PLAY;
	sonic->playback_substream = substream;
	runtime->hw = snd_sonicvibes_playback;
	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, snd_sonicvibes_hw_constraint_dac_rate, NULL, SNDRV_PCM_HW_PARAM_RATE, -1);
	return 0;
}

static int snd_sonicvibes_capture_open(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;

	sonic->mode |= SV_MODE_CAPTURE;
	sonic->capture_substream = substream;
	runtime->hw = snd_sonicvibes_capture;
	snd_pcm_hw_constraint_ratdens(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				      &snd_sonicvibes_hw_constraints_adc_clock);
	return 0;
}

static int snd_sonicvibes_playback_close(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);

	sonic->playback_substream = NULL;
	sonic->mode &= ~SV_MODE_PLAY;
	return 0;
}

static int snd_sonicvibes_capture_close(struct snd_pcm_substream *substream)
{
	struct sonicvibes *sonic = snd_pcm_substream_chip(substream);

	sonic->capture_substream = NULL;
	sonic->mode &= ~SV_MODE_CAPTURE;
	return 0;
}

static struct snd_pcm_ops snd_sonicvibes_playback_ops = {
	.open =		snd_sonicvibes_playback_open,
	.close =	snd_sonicvibes_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_sonicvibes_hw_params,
	.hw_free =	snd_sonicvibes_hw_free,
	.prepare =	snd_sonicvibes_playback_prepare,
	.trigger =	snd_sonicvibes_playback_trigger,
	.pointer =	snd_sonicvibes_playback_pointer,
};

static struct snd_pcm_ops snd_sonicvibes_capture_ops = {
	.open =		snd_sonicvibes_capture_open,
	.close =	snd_sonicvibes_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_sonicvibes_hw_params,
	.hw_free =	snd_sonicvibes_hw_free,
	.prepare =	snd_sonicvibes_capture_prepare,
	.trigger =	snd_sonicvibes_capture_trigger,
	.pointer =	snd_sonicvibes_capture_pointer,
};

static int __devinit snd_sonicvibes_pcm(struct sonicvibes * sonic, int device, struct snd_pcm ** rpcm)
{
	struct snd_pcm *pcm;
	int err;

	if ((err = snd_pcm_new(sonic->card, "s3_86c617", device, 1, 1, &pcm)) < 0)
		return err;
	snd_assert(pcm != NULL, return -EINVAL);

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sonicvibes_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sonicvibes_capture_ops);

	pcm->private_data = sonic;
	pcm->info_flags = 0;
	strcpy(pcm->name, "S3 SonicVibes");
	sonic->pcm = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(sonic->pci), 64*1024, 128*1024);

	if (rpcm)
		*rpcm = pcm;
	return 0;
}

/*
 *  Mixer part
 */

#define SONICVIBES_MUX(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_sonicvibes_info_mux, \
  .get = snd_sonicvibes_get_mux, .put = snd_sonicvibes_put_mux }

static int snd_sonicvibes_info_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	static char *texts[7] = {
		"CD", "PCM", "Aux1", "Line", "Aux0", "Mic", "Mix"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 2;
	uinfo->value.enumerated.items = 7;
	if (uinfo->value.enumerated.item >= 7)
		uinfo->value.enumerated.item = 6;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_sonicvibes_get_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct sonicvibes *sonic = snd_kcontrol_chip(kcontrol);
	
	spin_lock_irq(&sonic->reg_lock);
	ucontrol->value.enumerated.item[0] = ((snd_sonicvibes_in1(sonic, SV_IREG_LEFT_ADC) & SV_RECSRC_OUT) >> 5) - 1;
	ucontrol->value.enumerated.item[1] = ((snd_sonicvibes_in1(sonic, SV_IREG_RIGHT_ADC) & SV_RECSRC_OUT) >> 5) - 1;
	spin_unlock_irq(&sonic->reg_lock);
	return 0;
}

static int snd_sonicvibes_put_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct sonicvibes *sonic = snd_kcontrol_chip(kcontrol);
	unsigned short left, right, oval1, oval2;
	int change;
	
	if (ucontrol->value.enumerated.item[0] >= 7 ||
	    ucontrol->value.enumerated.item[1] >= 7)
		return -EINVAL;
	left = (ucontrol->value.enumerated.item[0] + 1) << 5;
	right = (ucontrol->value.enumerated.item[1] + 1) << 5;
	spin_lock_irq(&sonic->reg_lock);
	oval1 = snd_sonicvibes_in1(sonic, SV_IREG_LEFT_ADC);
	oval2 = snd_sonicvibes_in1(sonic, SV_IREG_RIGHT_ADC);
	left = (oval1 & ~SV_RECSRC_OUT) | left;
	right = (oval2 & ~SV_RECSRC_OUT) | right;
	change = left != oval1 || right != oval2;
	snd_sonicvibes_out1(sonic, SV_IREG_LEFT_ADC, left);
	snd_sonicvibes_out1(sonic, SV_IREG_RIGHT_ADC, right);
	spin_unlock_irq(&sonic->reg_lock);
	return change;
}

#define SONICVIBES_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_sonicvibes_info_single, \
  .get = snd_sonicvibes_get_single, .put = snd_sonicvibes_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_sonicvibes_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *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;
}

static int snd_sonicvibes_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct sonicvibes *sonic = snd_kcontrol_chip(kcontrol);
	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_irq(&sonic->reg_lock);
	ucontrol->value.integer.value[0] = (snd_sonicvibes_in1(sonic, reg)>> shift) & mask;
	spin_unlock_irq(&sonic->reg_lock);
	if (invert)
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
	return 0;
}

static int snd_sonicvibes_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct sonicvibes *sonic = snd_kcontrol_chip(kcontrol);
	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, oval;
	
	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		val = mask - val;
	val <<= shift;
	spin_lock_irq(&sonic->reg_lock);
	oval = snd_sonicvibes_in1(sonic, reg);
	val = (oval & ~(mask << shift)) | val;
	change = val != oval;
	snd_sonicvibes_out1(sonic, reg, val);
	spin_unlock_irq(&sonic->reg_lock);
	return change;
}

#define SONICVIBES_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_sonicvibes_info_double, \
  .get = snd_sonicvibes_get_double, .put = snd_sonicvibes_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

static int snd_sonicvibes_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *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;
}

static int snd_sonicvibes_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct sonicvibes *sonic = snd_kcontrol_chip(kcontrol);
	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_irq(&sonic->reg_lock);
	ucontrol->value.integer.value[0] = (snd_sonicvibes_in1(sonic, left_reg) >> shift_left) & mask;
	ucontrol->value.integer.value[1] = (snd_sonicvibes_in1(sonic, right_reg) >> shift_right) & mask;
	spin_unlock_irq(&sonic->reg_lock);
	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;
}

static int snd_sonicvibes_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct sonicvibes *sonic = snd_kcontrol_chip(kcontrol);
	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, oval1, oval2;
	
	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_irq(&sonic->reg_lock);
	oval1 = snd_sonicvibes_in1(sonic, left_reg);
	oval2 = snd_sonicvibes_in1(sonic, right_reg);
	val1 = (oval1 & ~(mask << shift_left)) | val1;
	val2 = (oval2 & ~(mask << shift_right)) | val2;
	change = val1 != oval1 || val2 != oval2;
	snd_sonicvibes_out1(sonic, left_reg, val1);
	snd_sonicvibes_out1(sonic, right_reg, val2);
	spin_unlock_irq(&sonic->reg_lock);
	return change;
}

static struct snd_kcontrol_new snd_sonicvibes_controls[] __devinitdata = {
SONICVIBES_DOUBLE("Capture Volume", 0, SV_IREG_LEFT_ADC, SV_IREG_RIGHT_ADC, 0, 0, 15, 0),
SONICVIBES_DOUBLE("Aux Playback Switch", 0, SV_IREG_LEFT_AUX1, SV_IREG_RIGHT_AUX1, 7, 7, 1, 1),
SONICVIBES_DOUBLE("Aux Playback Volume", 0, SV_IREG_LEFT_AUX1, SV_IREG_RIGHT_AUX1, 0, 0, 31, 1),
SONICVIBES_DOUBLE("CD Playback Switch", 0, SV_IREG_LEFT_CD, SV_IREG_RIGHT_CD, 7, 7, 1, 1),
SONICVIBES_DOUBLE("CD Playback Volume", 0, SV_IREG_LEFT_CD, SV_IREG_RIGHT_CD, 0, 0, 31, 1),
SONICVIBES_DOUBLE("Line Playback Switch", 0, SV_IREG_LEFT_LINE, SV_IREG_RIGHT_LINE, 7, 7, 1, 1),
SONICVIBES_DOUBLE("Line Playback Volume", 0, SV_IREG_LEFT_LINE, SV_IREG_RIGHT_LINE, 0, 0, 31, 1),
SONICVIBES_SINGLE("Mic Playback Switch", 0, SV_IREG_MIC, 7, 1, 1),
SONICVIBES_SINGLE("Mic Playback Volume", 0, SV_IREG_MIC, 0, 15, 1),
SONICVIBES_SINGLE("Mic Boost", 0, SV_IREG_LEFT_ADC, 4, 1, 0),
SONICVIBES_DOUBLE("Synth Playback Switch", 0, SV_IREG_LEFT_SYNTH, SV_IREG_RIGHT_SYNTH, 7, 7, 1, 1),
SONICVIBES_DOUBLE("Synth Playback Volume", 0, SV_IREG_LEFT_SYNTH, SV_IREG_RIGHT_SYNTH, 0, 0, 31, 1),
SONICVIBES_DOUBLE("Aux Playback Switch", 1, SV_IREG_LEFT_AUX2, SV_IREG_RIGHT_AUX2, 7, 7, 1, 1),
SONICVIBES_DOUBLE("Aux Playback Volume", 1, SV_IREG_LEFT_AUX2, SV_IREG_RIGHT_AUX2, 0, 0, 31, 1),
SONICVIBES_DOUBLE("Master Playback Switch", 0, SV_IREG_LEFT_ANALOG, SV_IREG_RIGHT_ANALOG, 7, 7, 1, 1),
SONICVIBES_DOUBLE("Master Playback Volume", 0, SV_IREG_LEFT_ANALOG, SV_IREG_RIGHT_ANALOG, 0, 0, 31, 1),
SONICVIBES_DOUBLE("PCM Playback Switch", 0, SV_IREG_LEFT_PCM, SV_IREG_RIGHT_PCM, 7, 7, 1, 1),
SONICVIBES_DOUBLE("PCM Playback Volume", 0, SV_IREG_LEFT_PCM, SV_IREG_RIGHT_PCM, 0, 0, 63, 1),
SONICVIBES_SINGLE("Loopback Capture Switch", 0, SV_IREG_ADC_OUTPUT_CTRL, 0, 1, 0),
SONICVIBES_SINGLE("Loopback Capture Volume", 0, SV_IREG_ADC_OUTPUT_CTRL, 2, 63, 1),
SONICVIBES_MUX("Capture Source", 0)
};

static void snd_sonicvibes_master_free(struct snd_kcontrol *kcontrol)
{
	struct sonicvibes *sonic = snd_kcontrol_chip(kcontrol);
	sonic->master_mute = NULL;
	sonic->master_volume = NULL;
}

static int __devinit snd_sonicvibes_mixer(struct sonicvibes * sonic)
{
	struct snd_card *card;
	struct snd_kcontrol *kctl;
	unsigned int idx;
	int err;

	snd_assert(sonic != NULL && sonic->card != NULL, return -EINVAL);
	card = sonic->card;
	strcpy(card->mixername, "S3 SonicVibes");

	for (idx = 0; idx < ARRAY_SIZE(snd_sonicvibes_controls); idx++) {
		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_sonicvibes_controls[idx], sonic))) < 0)
			return err;
		switch (idx) {
		case 0:
		case 1: kctl->private_free = snd_sonicvibes_master_free; break;
		}
	}
	return 0;
}

/*

 */

static void snd_sonicvibes_proc_read(struct snd_info_entry *entry, 
				     struct snd_info_buffer *buffer)
{
	struct sonicvibes *sonic = entry->private_data;
	unsigned char tmp;

	tmp = sonic->srs_space & 0x0f;
	snd_iprintf(buffer, "SRS 3D           : %s\n",
		    sonic->srs_space & 0x80 ? "off" : "on");
	snd_iprintf(buffer, "SRS Space        : %s\n",
		    tmp == 0x00 ? "100%" :
		    tmp == 0x01 ? "75%" :
		    tmp == 0x02 ? "50%" :
		    tmp == 0x03 ? "25%" : "0%");
	tmp = sonic->srs_center & 0x0f;
	snd_iprintf(buffer, "SRS Center       : %s\n",
		    tmp == 0x00 ? "100%" :
		    tmp == 0x01 ? "75%" :
		    tmp == 0x02 ? "50%" :
		    tmp == 0x03 ? "25%" : "0%");
	tmp = sonic->wave_source & 0x03;
	snd_iprintf(buffer, "WaveTable Source : %s\n",
		    tmp == 0x00 ? "on-board ROM" :
		    tmp == 0x01 ? "PCI bus" : "on-board ROM + PCI bus");
	tmp = sonic->mpu_switch;
	snd_iprintf(buffer, "Onboard synth    : %s\n", tmp & 0x01 ? "on" : "off");
	snd_iprintf(buffer, "Ext. Rx to synth : %s\n", tmp & 0x02 ? "on" : "off");
	snd_iprintf(buffer, "MIDI to ext. Tx  : %s\n", tmp & 0x04 ? "on" : "off");
}

static void __devinit snd_sonicvibes_proc_init(struct sonicvibes * sonic)
{
	struct snd_info_entry *entry;

	if (! snd_card_proc_new(sonic->card, "sonicvibes", &entry))
		snd_info_set_text_ops(entry, sonic, snd_sonicvibes_proc_read);
}

/*

 */

#ifdef SUPPORT_JOYSTICK
static struct snd_kcontrol_new snd_sonicvibes_game_control __devinitdata =
SONICVIBES_SINGLE("Joystick Speed", 0, SV_IREG_GAME_PORT, 1, 15, 0);

static int __devinit snd_sonicvibes_create_gameport(struct sonicvibes *sonic)
{
	struct gameport *gp;

	sonic->gameport = gp = gameport_allocate_port();
	if (!gp) {
		printk(KERN_ERR "sonicvibes: cannot allocate memory for gameport\n");
		return -ENOMEM;
	}

	gameport_set_name(gp, "SonicVibes Gameport");
	gameport_set_phys(gp, "pci%s/gameport0", pci_name(sonic->pci));
	gameport_set_dev_parent(gp, &sonic->pci->dev);
	gp->io = sonic->game_port;

	gameport_register_port(gp);

	snd_ctl_add(sonic->card, snd_ctl_new1(&snd_sonicvibes_game_control, sonic));

	return 0;
}

static void snd_sonicvibes_free_gameport(struct sonicvibes *sonic)
{
	if (sonic->gameport) {
		gameport_unregister_port(sonic->gameport);
		sonic->gameport = NULL;
	}
}
#else
static inline int snd_sonicvibes_create_gameport(struct sonicvibes *sonic) { return -ENOSYS; }
static inline void snd_sonicvibes_free_gameport(struct sonicvibes *sonic) { }
#endif

static int snd_sonicvibes_free(struct sonicvibes *sonic)
{
	snd_sonicvibes_free_gameport(sonic);
	pci_write_config_dword(sonic->pci, 0x40, sonic->dmaa_port);
	pci_write_config_dword(sonic->pci, 0x48, sonic->dmac_port);
	if (sonic->irq >= 0)
		free_irq(sonic->irq, sonic);
	release_and_free_resource(sonic->res_dmaa);
	release_and_free_resource(sonic->res_dmac);
	pci_release_regions(sonic->pci);
	pci_disable_device(sonic->pci);
	kfree(sonic);
	return 0;
}

static int snd_sonicvibes_dev_free(struct snd_device *device)
{
	struct sonicvibes *sonic = device->device_data;
	return snd_sonicvibes_free(sonic);
}

static int __devinit snd_sonicvibes_create(struct snd_card *card,
					struct pci_dev *pci,
					int reverb,
					int mge,
					struct sonicvibes ** rsonic)
{
	struct sonicvibes *sonic;
	unsigned int dmaa, dmac;
	int err;
	static struct snd_device_ops ops = {
		.dev_free =	snd_sonicvibes_dev_free,
	};

	*rsonic = NULL;
	/* enable PCI device */
	if ((err = pci_enable_device(pci)) < 0)
		return err;
	/* check, if we can restrict PCI DMA transfers to 24 bits */
        if (pci_set_dma_mask(pci, DMA_24BIT_MASK) < 0 ||
	    pci_set_consistent_dma_mask(pci, DMA_24BIT_MASK) < 0) {
		snd_printk(KERN_ERR "architecture does not support 24bit PCI busmaster DMA\n");
		pci_disable_device(pci);
                return -ENXIO;
        }

	sonic = kzalloc(sizeof(*sonic), GFP_KERNEL);
	if (sonic == NULL) {
		pci_disable_device(pci);
		return -ENOMEM;
	}
	spin_lock_init(&sonic->reg_lock);
	sonic->card = card;
	sonic->pci = pci;
	sonic->irq = -1;

	if ((err = pci_request_regions(pci, "S3 SonicVibes")) < 0) {
		kfree(sonic);
		pci_disable_device(pci);
		return err;
	}

	sonic->sb_port = pci_resource_start(pci, 0);
	sonic->enh_port = pci_resource_start(pci, 1);
	sonic->synth_port = pci_resource_start(pci, 2);
	sonic->midi_port = pci_resource_start(pci, 3);
	sonic->game_port = pci_resource_start(pci, 4);

	if (request_irq(pci->irq, snd_sonicvibes_interrupt, IRQF_SHARED,
			"S3 SonicVibes", sonic)) {
		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
		snd_sonicvibes_free(sonic);
		return -EBUSY;
	}
	sonic->irq = pci->irq;

	pci_read_config_dword(pci, 0x40, &dmaa);
	pci_read_config_dword(pci, 0x48, &dmac);
	dmaio &= ~0x0f;
	dmaa &= ~0x0f;
	dmac &= ~0x0f;
	if (!dmaa) {
		dmaa = dmaio;
		dmaio += 0x10;
		snd_printk(KERN_INFO "BIOS did not allocate DDMA channel A i/o, allocated at 0x%x\n", dmaa);
	}
	if (!dmac) {
		dmac = dmaio;
		dmaio += 0x10;
		snd_printk(KERN_INFO "BIOS did not allocate DDMA channel C i/o, allocated at 0x%x\n", dmac);
	}
	pci_write_config_dword(pci, 0x40, dmaa);
	pci_write_config_dword(pci, 0x48, dmac);

	if ((sonic->res_dmaa = request_region(dmaa, 0x10, "S3 SonicVibes DDMA-A")) == NULL) {
		snd_sonicvibes_free(sonic);
		snd_printk(KERN_ERR "unable to grab DDMA-A port at 0x%x-0x%x\n", dmaa, dmaa + 0x10 - 1);
		return -EBUSY;
	}
	if ((sonic->res_dmac = request_region(dmac, 0x10, "S3 SonicVibes DDMA-C")) == NULL) {
		snd_sonicvibes_free(sonic);
		snd_printk(KERN_ERR "unable to grab DDMA-C port at 0x%x-0x%x\n", dmac, dmac + 0x10 - 1);
		return -EBUSY;
	}

	pci_read_config_dword(pci, 0x40, &sonic->dmaa_port);
	pci_read_config_dword(pci, 0x48, &sonic->dmac_port);
	sonic->dmaa_port &= ~0x0f;
	sonic->dmac_port &= ~0x0f;
	pci_write_config_dword(pci, 0x40, sonic->dmaa_port | 9);	/* enable + enhanced */
	pci_write_config_dword(pci, 0x48, sonic->dmac_port | 9);	/* enable */
	/* ok.. initialize S3 SonicVibes chip */
	outb(SV_RESET, SV_REG(sonic, CONTROL));		/* reset chip */
	udelay(100);
	outb(0, SV_REG(sonic, CONTROL));	/* release reset */
	udelay(100);
	outb(SV_ENHANCED | SV_INTA | (reverb ? SV_REVERB : 0), SV_REG(sonic, CONTROL));
	inb(SV_REG(sonic, STATUS));	/* clear IRQs */
#if 1
	snd_sonicvibes_out(sonic, SV_IREG_DRIVE_CTRL, 0);	/* drive current 16mA */
#else
	snd_sonicvibes_out(sonic, SV_IREG_DRIVE_CTRL, 0x40);	/* drive current 8mA */
#endif
	snd_sonicvibes_out(sonic, SV_IREG_PC_ENABLE, sonic->enable = 0);	/* disable playback & capture */
	outb(sonic->irqmask = ~(SV_DMAA_MASK | SV_DMAC_MASK | SV_UD_MASK), SV_REG(sonic, IRQMASK));
	inb(SV_REG(sonic, STATUS));	/* clear IRQs */
	snd_sonicvibes_out(sonic, SV_IREG_ADC_CLOCK, 0);	/* use PLL as clock source */
	snd_sonicvibes_out(sonic, SV_IREG_ANALOG_POWER, 0);	/* power up analog parts */
	snd_sonicvibes_out(sonic, SV_IREG_DIGITAL_POWER, 0);	/* power up digital parts */
	snd_sonicvibes_setpll(sonic, SV_IREG_ADC_PLL, 8000);
	snd_sonicvibes_out(sonic, SV_IREG_SRS_SPACE, sonic->srs_space = 0x80);	/* SRS space off */
	snd_sonicvibes_out(sonic, SV_IREG_SRS_CENTER, sonic->srs_center = 0x00);/* SRS center off */
	snd_sonicvibes_out(sonic, SV_IREG_MPU401, sonic->mpu_switch = 0x05);	/* MPU-401 switch */
	snd_sonicvibes_out(sonic, SV_IREG_WAVE_SOURCE, sonic->wave_source = 0x00);	/* onboard ROM */
	snd_sonicvibes_out(sonic, SV_IREG_PCM_RATE_LOW, (8000 * 65536 / SV_FULLRATE) & 0xff);
	snd_sonicvibes_out(sonic, SV_IREG_PCM_RATE_HIGH, ((8000 * 65536 / SV_FULLRATE) >> 8) & 0xff);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_ADC, mge ? 0xd0 : 0xc0);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_ADC, 0xc0);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_AUX1, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_AUX1, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_CD, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_CD, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_LINE, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_LINE, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_MIC, 0x8f);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_SYNTH, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_SYNTH, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_AUX2, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_AUX2, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_ANALOG, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_ANALOG, 0x9f);
	snd_sonicvibes_out(sonic, SV_IREG_LEFT_PCM, 0xbf);
	snd_sonicvibes_out(sonic, SV_IREG_RIGHT_PCM, 0xbf);
	snd_sonicvibes_out(sonic, SV_IREG_ADC_OUTPUT_CTRL, 0xfc);
#if 0
	snd_sonicvibes_debug(sonic);
#endif
	sonic->revision = snd_sonicvibes_in(sonic, SV_IREG_REVISION);

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, sonic, &ops)) < 0) {
		snd_sonicvibes_free(sonic);
		return err;
	}

	snd_sonicvibes_proc_init(sonic);

	snd_card_set_dev(card, &pci->dev);

	*rsonic = sonic;
	return 0;
}

/*
 *  MIDI section
 */

static struct snd_kcontrol_new snd_sonicvibes_midi_controls[] __devinitdata = {
SONICVIBES_SINGLE("SonicVibes Wave Source RAM", 0, SV_IREG_WAVE_SOURCE, 0, 1, 0),
SONICVIBES_SINGLE("SonicVibes Wave Source RAM+ROM", 0, SV_IREG_WAVE_SOURCE, 1, 1, 0),
SONICVIBES_SINGLE("SonicVibes Onboard Synth", 0, SV_IREG_MPU401, 0, 1, 0),
SONICVIBES_SINGLE("SonicVibes External Rx to Synth", 0, SV_IREG_MPU401, 1, 1, 0),
SONICVIBES_SINGLE("SonicVibes External Tx", 0, SV_IREG_MPU401, 2, 1, 0)
};

static int snd_sonicvibes_midi_input_open(struct snd_mpu401 * mpu)
{
	struct sonicvibes *sonic = mpu->private_data;
	outb(sonic->irqmask &= ~SV_MIDI_MASK, SV_REG(sonic, IRQMASK));
	return 0;
}

static void snd_sonicvibes_midi_input_close(struct snd_mpu401 * mpu)
{
	struct sonicvibes *sonic = mpu->private_data;
	outb(sonic->irqmask |= SV_MIDI_MASK, SV_REG(sonic, IRQMASK));
}

static int __devinit snd_sonicvibes_midi(struct sonicvibes * sonic,
					 struct snd_rawmidi *rmidi)
{
	struct snd_mpu401 * mpu = rmidi->private_data;
	struct snd_card *card = sonic->card;
	struct snd_rawmidi_str *dir;
	unsigned int idx;
	int err;

	mpu->private_data = sonic;
	mpu->open_input = snd_sonicvibes_midi_input_open;
	mpu->close_input = snd_sonicvibes_midi_input_close;
	dir = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
	for (idx = 0; idx < ARRAY_SIZE(snd_sonicvibes_midi_controls); idx++)
		if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_sonicvibes_midi_controls[idx], sonic))) < 0)
			return err;
	return 0;
}

static int __devinit snd_sonic_probe(struct pci_dev *pci,
				     const struct pci_device_id *pci_id)
{
	static int dev;
	struct snd_card *card;
	struct sonicvibes *sonic;
	struct snd_rawmidi *midi_uart;
	struct snd_opl3 *opl3;
	int idx, err;

	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;
	for (idx = 0; idx < 5; idx++) {
		if (pci_resource_start(pci, idx) == 0 ||
		    !(pci_resource_flags(pci, idx) & IORESOURCE_IO)) {
			snd_card_free(card);
			return -ENODEV;
		}
	}
	if ((err = snd_sonicvibes_create(card, pci,
					 reverb[dev] ? 1 : 0,
					 mge[dev] ? 1 : 0,
					 &sonic)) < 0) {
		snd_card_free(card);
		return err;
	}

	strcpy(card->driver, "SonicVibes");
	strcpy(card->shortname, "S3 SonicVibes");
	sprintf(card->longname, "%s rev %i at 0x%llx, irq %i",
		card->shortname,
		sonic->revision,
		(unsigned long long)pci_resource_start(pci, 1),
		sonic->irq);

	if ((err = snd_sonicvibes_pcm(sonic, 0, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_sonicvibes_mixer(sonic)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_SONICVIBES,
				       sonic->midi_port, MPU401_INFO_INTEGRATED,
				       sonic->irq, 0,
				       &midi_uart)) < 0) {
		snd_card_free(card);
		return err;
	}
	snd_sonicvibes_midi(sonic, midi_uart);
	if ((err = snd_opl3_create(card, sonic->synth_port,
				   sonic->synth_port + 2,
				   OPL3_HW_OPL3_SV, 1, &opl3)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}

	snd_sonicvibes_create_gameport(sonic);

	if ((err = snd_card_register(card)) < 0) {
		snd_card_free(card);
		return err;
	}
	
	pci_set_drvdata(pci, card);
	dev++;
	return 0;
}

static void __devexit snd_sonic_remove(struct pci_dev *pci)
{
	snd_card_free(pci_get_drvdata(pci));
	pci_set_drvdata(pci, NULL);
}

static struct pci_driver driver = {
	.name = "S3 SonicVibes",
	.id_table = snd_sonic_ids,
	.probe = snd_sonic_probe,
	.remove = __devexit_p(snd_sonic_remove),
};

static int __init alsa_card_sonicvibes_init(void)
{
	return pci_register_driver(&driver);
}

static void __exit alsa_card_sonicvibes_exit(void)
{
	pci_unregister_driver(&driver);
}

module_init(alsa_card_sonicvibes_init)
module_exit(alsa_card_sonicvibes_exit)