sound/isa/sgalaxy.c - linux/kernel/git/torvalds/linux - Git at Google

 /*
  *  Driver for Aztech Sound Galaxy cards
  *  Copyright (c) by Christopher Butler <chrisb@sandy.force9.co.uk.
  *
  *  I don't have documentation for this card, I based this driver on the
  *  driver for OSS/Free included in the kernel source (drivers/sound/sgalaxy.c)
  *
  *   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/init.h>
 #include <linux/err.h>
 #include <linux/isa.h>
 #include <linux/delay.h>
 #include <linux/time.h>
 #include <linux/interrupt.h>
 #include <linux/moduleparam.h>
 #include <asm/dma.h>
 #include <sound/core.h>
 #include <sound/sb.h>
 #include <sound/ad1848.h>
 #include <sound/control.h>
 #define SNDRV_LEGACY_FIND_FREE_IRQ
 #define SNDRV_LEGACY_FIND_FREE_DMA
 #include <sound/initval.h>

 MODULE_AUTHOR("Christopher Butler <chrisb@sandy.force9.co.uk>");
 MODULE_DESCRIPTION("Aztech Sound Galaxy");
 MODULE_LICENSE("GPL");
 MODULE_SUPPORTED_DEVICE("{{Aztech Systems,Sound Galaxy}}");

 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;	/* Enable this card */
 static long sbport[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x220,0x240 */
 static long wssport[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x530,0xe80,0xf40,0x604 */
 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 7,9,10,11 */
 static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 0,1,3 */

 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for Sound Galaxy soundcard.");
 module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for Sound Galaxy soundcard.");
 module_param_array(sbport, long, NULL, 0444);
 MODULE_PARM_DESC(sbport, "Port # for Sound Galaxy SB driver.");
 module_param_array(wssport, long, NULL, 0444);
 MODULE_PARM_DESC(wssport, "Port # for Sound Galaxy WSS driver.");
 module_param_array(irq, int, NULL, 0444);
 MODULE_PARM_DESC(irq, "IRQ # for Sound Galaxy driver.");
 module_param_array(dma1, int, NULL, 0444);
 MODULE_PARM_DESC(dma1, "DMA1 # for Sound Galaxy driver.");

 #define SGALAXY_AUXC_LEFT 18
 #define SGALAXY_AUXC_RIGHT 19

 #define PFX	"sgalaxy: "

 /*

  */

 #define AD1848P1( port, x ) ( port + c_d_c_AD1848##x )

 /* from lowlevel/sb/sb.c - to avoid having to allocate a struct snd_sb for the */
 /* short time we actually need it.. */

 static int snd_sgalaxy_sbdsp_reset(unsigned long port)
 {
 	int i;

 	outb(1, SBP1(port, RESET));
 	udelay(10);
 	outb(0, SBP1(port, RESET));
 	udelay(30);
 	for (i = 0; i < 1000 && !(inb(SBP1(port, DATA_AVAIL)) & 0x80); i++);
 	if (inb(SBP1(port, READ)) != 0xaa) {
 		snd_printd("sb_reset: failed at 0x%lx!!!\n", port);
 		return -ENODEV;
 	}
 	return 0;
 }

 static int __devinit snd_sgalaxy_sbdsp_command(unsigned long port,
 					       unsigned char val)
 {
 	int i;

 	for (i = 10000; i; i--)
 		if ((inb(SBP1(port, STATUS)) & 0x80) == 0) {
 			outb(val, SBP1(port, COMMAND));
 			return 1;
 		}

 	return 0;
 }

 static irqreturn_t snd_sgalaxy_dummy_interrupt(int irq, void *dev_id)
 {
 	return IRQ_NONE;
 }

 static int __devinit snd_sgalaxy_setup_wss(unsigned long port, int irq, int dma)
 {
 	static int interrupt_bits[] = {-1, -1, -1, -1, -1, -1, -1, 0x08, -1,
 				       0x10, 0x18, 0x20, -1, -1, -1, -1};
 	static int dma_bits[] = {1, 2, 0, 3};
 	int tmp, tmp1;

 	if ((tmp = inb(port + 3)) == 0xff)
 	{
 		snd_printdd("I/O address dead (0x%lx)\n", port);
 		return 0;
 	}
 #if 0
 	snd_printdd("WSS signature = 0x%x\n", tmp);
 #endif

         if ((tmp & 0x3f) != 0x04 &&
             (tmp & 0x3f) != 0x0f &&
             (tmp & 0x3f) != 0x00) {
 		snd_printdd("No WSS signature detected on port 0x%lx\n",
 			    port + 3);
 		return 0;
 	}

 #if 0
 	snd_printdd(PFX "setting up IRQ/DMA for WSS\n");
 #endif

         /* initialize IRQ for WSS codec */
         tmp = interrupt_bits[irq % 16];
         if (tmp < 0)
                 return -EINVAL;

 	if (request_irq(irq, snd_sgalaxy_dummy_interrupt, IRQF_DISABLED, "sgalaxy", NULL)) {
 		snd_printk(KERN_ERR "sgalaxy: can't grab irq %d\n", irq);
 		return -EIO;
 	}

         outb(tmp | 0x40, port);
         tmp1 = dma_bits[dma % 4];
         outb(tmp | tmp1, port);

 	free_irq(irq, NULL);

 	return 0;
 }

 static int __devinit snd_sgalaxy_detect(int dev, int irq, int dma)
 {
 #if 0
 	snd_printdd(PFX "switching to WSS mode\n");
 #endif

 	/* switch to WSS mode */
 	snd_sgalaxy_sbdsp_reset(sbport[dev]);

 	snd_sgalaxy_sbdsp_command(sbport[dev], 9);
 	snd_sgalaxy_sbdsp_command(sbport[dev], 0);

 	udelay(400);
 	return snd_sgalaxy_setup_wss(wssport[dev], irq, dma);
 }

 static struct ad1848_mix_elem snd_sgalaxy_controls[] = {
 AD1848_DOUBLE("Aux Playback Switch", 0, SGALAXY_AUXC_LEFT, SGALAXY_AUXC_RIGHT, 7, 7, 1, 1),
 AD1848_DOUBLE("Aux Playback Volume", 0, SGALAXY_AUXC_LEFT, SGALAXY_AUXC_RIGHT, 0, 0, 31, 0)
 };

 static int __devinit snd_sgalaxy_mixer(struct snd_ad1848 *chip)
 {
 	struct snd_card *card = chip->card;
 	struct snd_ctl_elem_id id1, id2;
 	unsigned int idx;
 	int err;

 	memset(&id1, 0, sizeof(id1));
 	memset(&id2, 0, sizeof(id2));
 	id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 	/* reassign AUX0 to LINE */
 	strcpy(id1.name, "Aux Playback Switch");
 	strcpy(id2.name, "Line Playback Switch");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 	strcpy(id1.name, "Aux Playback Volume");
 	strcpy(id2.name, "Line Playback Volume");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 	/* reassign AUX1 to FM */
 	strcpy(id1.name, "Aux Playback Switch"); id1.index = 1;
 	strcpy(id2.name, "FM Playback Switch");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 	strcpy(id1.name, "Aux Playback Volume");
 	strcpy(id2.name, "FM Playback Volume");
 	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
 		return err;
 	/* build AUX2 input */
 	for (idx = 0; idx < ARRAY_SIZE(snd_sgalaxy_controls); idx++) {
 		if ((err = snd_ad1848_add_ctl_elem(chip, &snd_sgalaxy_controls[idx])) < 0)
 			return err;
 	}
 	return 0;
 }

 static int __devinit snd_sgalaxy_match(struct device *devptr, unsigned int dev)
 {
 	if (!enable[dev])
 		return 0;
 	if (sbport[dev] == SNDRV_AUTO_PORT) {
 		snd_printk(KERN_ERR PFX "specify SB port\n");
 		return 0;
 	}
 	if (wssport[dev] == SNDRV_AUTO_PORT) {
 		snd_printk(KERN_ERR PFX "specify WSS port\n");
 		return 0;
 	}
 	return 1;
 }

 static int __devinit snd_sgalaxy_probe(struct device *devptr, unsigned int dev)
 {
 	static int possible_irqs[] = {7, 9, 10, 11, -1};
 	static int possible_dmas[] = {1, 3, 0, -1};
 	int err, xirq, xdma1;
 	struct snd_card *card;
 	struct snd_ad1848 *chip;

 	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 	if (card == NULL)
 		return -ENOMEM;

 	xirq = irq[dev];
 	if (xirq == SNDRV_AUTO_IRQ) {
 		if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
 			snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
 			err = -EBUSY;
 			goto _err;
 		}
 	}
 	xdma1 = dma1[dev];
         if (xdma1 == SNDRV_AUTO_DMA) {
 		if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
 			snd_printk(KERN_ERR PFX "unable to find a free DMA\n");
 			err = -EBUSY;
 			goto _err;
 		}
 	}

 	if ((err = snd_sgalaxy_detect(dev, xirq, xdma1)) < 0)
 		goto _err;

 	if ((err = snd_ad1848_create(card, wssport[dev] + 4,
 				     xirq, xdma1,
 				     AD1848_HW_DETECT, &chip)) < 0)
 		goto _err;
 	card->private_data = chip;

 	if ((err = snd_ad1848_pcm(chip, 0, NULL)) < 0) {
 		snd_printdd(PFX "error creating new ad1848 PCM device\n");
 		goto _err;
 	}
 	if ((err = snd_ad1848_mixer(chip)) < 0) {
 		snd_printdd(PFX "error creating new ad1848 mixer\n");
 		goto _err;
 	}
 	if ((err = snd_sgalaxy_mixer(chip)) < 0) {
 		snd_printdd(PFX "the mixer rewrite failed\n");
 		goto _err;
 	}

 	strcpy(card->driver, "Sound Galaxy");
 	strcpy(card->shortname, "Sound Galaxy");
 	sprintf(card->longname, "Sound Galaxy at 0x%lx, irq %d, dma %d",
 		wssport[dev], xirq, xdma1);

 	snd_card_set_dev(card, devptr);

 	if ((err = snd_card_register(card)) < 0)
 		goto _err;

 	dev_set_drvdata(devptr, card);
 	return 0;

  _err:
 	snd_card_free(card);
 	return err;
 }

 static int __devexit snd_sgalaxy_remove(struct device *devptr, unsigned int dev)
 {
 	snd_card_free(dev_get_drvdata(devptr));
 	dev_set_drvdata(devptr, NULL);
 	return 0;
 }

 #ifdef CONFIG_PM
 static int snd_sgalaxy_suspend(struct device *pdev, unsigned int n,
 			       pm_message_t state)
 {
 	struct snd_card *card = dev_get_drvdata(pdev);
 	struct snd_ad1848 *chip = card->private_data;

 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 	chip->suspend(chip);
 	return 0;
 }

 static int snd_sgalaxy_resume(struct device *pdev, unsigned int n)
 {
 	struct snd_card *card = dev_get_drvdata(pdev);
 	struct snd_ad1848 *chip = card->private_data;

 	chip->resume(chip);
 	snd_ad1848_out(chip, SGALAXY_AUXC_LEFT, chip->image[SGALAXY_AUXC_LEFT]);
 	snd_ad1848_out(chip, SGALAXY_AUXC_RIGHT, chip->image[SGALAXY_AUXC_RIGHT]);

 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 	return 0;
 }
 #endif

 #define DEV_NAME "sgalaxy"

 static struct isa_driver snd_sgalaxy_driver = {
 	.match		= snd_sgalaxy_match,
 	.probe		= snd_sgalaxy_probe,
 	.remove		= __devexit_p(snd_sgalaxy_remove),
 #ifdef CONFIG_PM
 	.suspend	= snd_sgalaxy_suspend,
 	.resume		= snd_sgalaxy_resume,
 #endif
 	.driver		= {
 		.name	= DEV_NAME
 	},
 };

 static int __init alsa_card_sgalaxy_init(void)
 {
 	return isa_register_driver(&snd_sgalaxy_driver, SNDRV_CARDS);
 }

 static void __exit alsa_card_sgalaxy_exit(void)
 {
 	isa_unregister_driver(&snd_sgalaxy_driver);
 }

 module_init(alsa_card_sgalaxy_init)
 module_exit(alsa_card_sgalaxy_exit)
	/*
	* Driver for Aztech Sound Galaxy cards
	* Copyright (c) by Christopher Butler <chrisb@sandy.force9.co.uk.
	*
	* I don't have documentation for this card, I based this driver on the
	* driver for OSS/Free included in the kernel source (drivers/sound/sgalaxy.c)
	*
	* 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/init.h>
	#include <linux/err.h>
	#include <linux/isa.h>
	#include <linux/delay.h>
	#include <linux/time.h>
	#include <linux/interrupt.h>
	#include <linux/moduleparam.h>
	#include <asm/dma.h>
	#include <sound/core.h>
	#include <sound/sb.h>
	#include <sound/ad1848.h>
	#include <sound/control.h>
	#define SNDRV_LEGACY_FIND_FREE_IRQ
	#define SNDRV_LEGACY_FIND_FREE_DMA
	#include <sound/initval.h>

	MODULE_AUTHOR("Christopher Butler <chrisb@sandy.force9.co.uk>");
	MODULE_DESCRIPTION("Aztech Sound Galaxy");
	MODULE_LICENSE("GPL");
	MODULE_SUPPORTED_DEVICE("{{Aztech Systems,Sound Galaxy}}");

	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; /* Enable this card */
	static long sbport[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x220,0x240 */
	static long wssport[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x530,0xe80,0xf40,0x604 */
	static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 7,9,10,11 */
	static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 0,1,3 */

	module_param_array(index, int, NULL, 0444);
	MODULE_PARM_DESC(index, "Index value for Sound Galaxy soundcard.");
	module_param_array(id, charp, NULL, 0444);
	MODULE_PARM_DESC(id, "ID string for Sound Galaxy soundcard.");
	module_param_array(sbport, long, NULL, 0444);
	MODULE_PARM_DESC(sbport, "Port # for Sound Galaxy SB driver.");
	module_param_array(wssport, long, NULL, 0444);
	MODULE_PARM_DESC(wssport, "Port # for Sound Galaxy WSS driver.");
	module_param_array(irq, int, NULL, 0444);
	MODULE_PARM_DESC(irq, "IRQ # for Sound Galaxy driver.");
	module_param_array(dma1, int, NULL, 0444);
	MODULE_PARM_DESC(dma1, "DMA1 # for Sound Galaxy driver.");

	#define SGALAXY_AUXC_LEFT 18
	#define SGALAXY_AUXC_RIGHT 19

	#define PFX "sgalaxy: "

	/*

	*/

	#define AD1848P1( port, x ) ( port + c_d_c_AD1848##x )

	/* from lowlevel/sb/sb.c - to avoid having to allocate a struct snd_sb for the */
	/* short time we actually need it.. */

	static int snd_sgalaxy_sbdsp_reset(unsigned long port)
	{
	int i;

	outb(1, SBP1(port, RESET));
	udelay(10);
	outb(0, SBP1(port, RESET));
	udelay(30);
	for (i = 0; i < 1000 && !(inb(SBP1(port, DATA_AVAIL)) & 0x80); i++);
	if (inb(SBP1(port, READ)) != 0xaa) {
	snd_printd("sb_reset: failed at 0x%lx!!!\n", port);
	return -ENODEV;
	}
	return 0;
	}

	static int __devinit snd_sgalaxy_sbdsp_command(unsigned long port,
	unsigned char val)
	{
	int i;

	for (i = 10000; i; i--)
	if ((inb(SBP1(port, STATUS)) & 0x80) == 0) {
	outb(val, SBP1(port, COMMAND));
	return 1;
	}

	return 0;
	}

	static irqreturn_t snd_sgalaxy_dummy_interrupt(int irq, void *dev_id)
	{
	return IRQ_NONE;
	}

	static int __devinit snd_sgalaxy_setup_wss(unsigned long port, int irq, int dma)
	{
	static int interrupt_bits[] = {-1, -1, -1, -1, -1, -1, -1, 0x08, -1,
	0x10, 0x18, 0x20, -1, -1, -1, -1};
	static int dma_bits[] = {1, 2, 0, 3};
	int tmp, tmp1;

	if ((tmp = inb(port + 3)) == 0xff)
	{
	snd_printdd("I/O address dead (0x%lx)\n", port);
	return 0;
	}
	#if 0
	snd_printdd("WSS signature = 0x%x\n", tmp);
	#endif

	if ((tmp & 0x3f) != 0x04 &&
	(tmp & 0x3f) != 0x0f &&
	(tmp & 0x3f) != 0x00) {
	snd_printdd("No WSS signature detected on port 0x%lx\n",
	port + 3);
	return 0;
	}

	#if 0
	snd_printdd(PFX "setting up IRQ/DMA for WSS\n");
	#endif

	/* initialize IRQ for WSS codec */
	tmp = interrupt_bits[irq % 16];
	if (tmp < 0)
	return -EINVAL;

	if (request_irq(irq, snd_sgalaxy_dummy_interrupt, IRQF_DISABLED, "sgalaxy", NULL)) {
	snd_printk(KERN_ERR "sgalaxy: can't grab irq %d\n", irq);
	return -EIO;
	}

	outb(tmp \| 0x40, port);
	tmp1 = dma_bits[dma % 4];
	outb(tmp \| tmp1, port);

	free_irq(irq, NULL);

	return 0;
	}

	static int __devinit snd_sgalaxy_detect(int dev, int irq, int dma)
	{
	#if 0
	snd_printdd(PFX "switching to WSS mode\n");
	#endif

	/* switch to WSS mode */
	snd_sgalaxy_sbdsp_reset(sbport[dev]);

	snd_sgalaxy_sbdsp_command(sbport[dev], 9);
	snd_sgalaxy_sbdsp_command(sbport[dev], 0);

	udelay(400);
	return snd_sgalaxy_setup_wss(wssport[dev], irq, dma);
	}

	static struct ad1848_mix_elem snd_sgalaxy_controls[] = {
	AD1848_DOUBLE("Aux Playback Switch", 0, SGALAXY_AUXC_LEFT, SGALAXY_AUXC_RIGHT, 7, 7, 1, 1),
	AD1848_DOUBLE("Aux Playback Volume", 0, SGALAXY_AUXC_LEFT, SGALAXY_AUXC_RIGHT, 0, 0, 31, 0)
	};

	static int __devinit snd_sgalaxy_mixer(struct snd_ad1848 *chip)
	{
	struct snd_card *card = chip->card;
	struct snd_ctl_elem_id id1, id2;
	unsigned int idx;
	int err;

	memset(&id1, 0, sizeof(id1));
	memset(&id2, 0, sizeof(id2));
	id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	/* reassign AUX0 to LINE */
	strcpy(id1.name, "Aux Playback Switch");
	strcpy(id2.name, "Line Playback Switch");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	strcpy(id1.name, "Aux Playback Volume");
	strcpy(id2.name, "Line Playback Volume");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	/* reassign AUX1 to FM */
	strcpy(id1.name, "Aux Playback Switch"); id1.index = 1;
	strcpy(id2.name, "FM Playback Switch");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	strcpy(id1.name, "Aux Playback Volume");
	strcpy(id2.name, "FM Playback Volume");
	if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
	return err;
	/* build AUX2 input */
	for (idx = 0; idx < ARRAY_SIZE(snd_sgalaxy_controls); idx++) {
	if ((err = snd_ad1848_add_ctl_elem(chip, &snd_sgalaxy_controls[idx])) < 0)
	return err;
	}
	return 0;
	}

	static int __devinit snd_sgalaxy_match(struct device *devptr, unsigned int dev)
	{
	if (!enable[dev])
	return 0;
	if (sbport[dev] == SNDRV_AUTO_PORT) {
	snd_printk(KERN_ERR PFX "specify SB port\n");
	return 0;
	}
	if (wssport[dev] == SNDRV_AUTO_PORT) {
	snd_printk(KERN_ERR PFX "specify WSS port\n");
	return 0;
	}
	return 1;
	}

	static int __devinit snd_sgalaxy_probe(struct device *devptr, unsigned int dev)
	{
	static int possible_irqs[] = {7, 9, 10, 11, -1};
	static int possible_dmas[] = {1, 3, 0, -1};
	int err, xirq, xdma1;
	struct snd_card *card;
	struct snd_ad1848 *chip;

	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
	if (card == NULL)
	return -ENOMEM;

	xirq = irq[dev];
	if (xirq == SNDRV_AUTO_IRQ) {
	if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
	snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
	err = -EBUSY;
	goto _err;
	}
	}
	xdma1 = dma1[dev];
	if (xdma1 == SNDRV_AUTO_DMA) {
	if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
	snd_printk(KERN_ERR PFX "unable to find a free DMA\n");
	err = -EBUSY;
	goto _err;
	}
	}

	if ((err = snd_sgalaxy_detect(dev, xirq, xdma1)) < 0)
	goto _err;

	if ((err = snd_ad1848_create(card, wssport[dev] + 4,
	xirq, xdma1,
	AD1848_HW_DETECT, &chip)) < 0)
	goto _err;
	card->private_data = chip;

	if ((err = snd_ad1848_pcm(chip, 0, NULL)) < 0) {
	snd_printdd(PFX "error creating new ad1848 PCM device\n");
	goto _err;
	}
	if ((err = snd_ad1848_mixer(chip)) < 0) {
	snd_printdd(PFX "error creating new ad1848 mixer\n");
	goto _err;
	}
	if ((err = snd_sgalaxy_mixer(chip)) < 0) {
	snd_printdd(PFX "the mixer rewrite failed\n");
	goto _err;
	}

	strcpy(card->driver, "Sound Galaxy");
	strcpy(card->shortname, "Sound Galaxy");
	sprintf(card->longname, "Sound Galaxy at 0x%lx, irq %d, dma %d",
	wssport[dev], xirq, xdma1);

	snd_card_set_dev(card, devptr);

	if ((err = snd_card_register(card)) < 0)
	goto _err;

	dev_set_drvdata(devptr, card);
	return 0;

	_err:
	snd_card_free(card);
	return err;
	}

	static int __devexit snd_sgalaxy_remove(struct device *devptr, unsigned int dev)
	{
	snd_card_free(dev_get_drvdata(devptr));
	dev_set_drvdata(devptr, NULL);
	return 0;
	}

	#ifdef CONFIG_PM
	static int snd_sgalaxy_suspend(struct device *pdev, unsigned int n,
	pm_message_t state)
	{
	struct snd_card *card = dev_get_drvdata(pdev);
	struct snd_ad1848 *chip = card->private_data;

	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	chip->suspend(chip);
	return 0;
	}

	static int snd_sgalaxy_resume(struct device *pdev, unsigned int n)
	{
	struct snd_card *card = dev_get_drvdata(pdev);
	struct snd_ad1848 *chip = card->private_data;

	chip->resume(chip);
	snd_ad1848_out(chip, SGALAXY_AUXC_LEFT, chip->image[SGALAXY_AUXC_LEFT]);
	snd_ad1848_out(chip, SGALAXY_AUXC_RIGHT, chip->image[SGALAXY_AUXC_RIGHT]);

	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
	}
	#endif

	#define DEV_NAME "sgalaxy"

	static struct isa_driver snd_sgalaxy_driver = {
	.match = snd_sgalaxy_match,
	.probe = snd_sgalaxy_probe,
	.remove = __devexit_p(snd_sgalaxy_remove),
	#ifdef CONFIG_PM
	.suspend = snd_sgalaxy_suspend,
	.resume = snd_sgalaxy_resume,
	#endif
	.driver = {
	.name = DEV_NAME
	},
	};

	static int __init alsa_card_sgalaxy_init(void)
	{
	return isa_register_driver(&snd_sgalaxy_driver, SNDRV_CARDS);
	}

	static void __exit alsa_card_sgalaxy_exit(void)
	{
	isa_unregister_driver(&snd_sgalaxy_driver);
	}

	module_init(alsa_card_sgalaxy_init)
	module_exit(alsa_card_sgalaxy_exit)