sound/isa/es1688/es1688.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Driver for generic ESS AudioDrive ESx688 soundcards
  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  */

 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/isa.h>
 #include <linux/isapnp.h>
 #include <linux/time.h>
 #include <linux/wait.h>
 #include <linux/module.h>
 #include <asm/dma.h>
 #include <sound/core.h>
 #include <sound/es1688.h>
 #include <sound/mpu401.h>
 #include <sound/opl3.h>
 #define SNDRV_LEGACY_FIND_FREE_IRQ
 #define SNDRV_LEGACY_FIND_FREE_DMA
 #include <sound/initval.h>

 #define CRD_NAME "Generic ESS ES1688/ES688 AudioDrive"
 #define DEV_NAME "es1688"

 MODULE_DESCRIPTION(CRD_NAME);
 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("snd_es968");

 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
 #ifdef CONFIG_PNP
 static bool isapnp[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_ISAPNP;
 #endif
 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;	/* Enable this card */
 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x220,0x240,0x260 */
 static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* Usually 0x388 */
 static long mpu_port[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};
 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 5,7,9,10 */
 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 5,7,9,10 */
 static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 0,1,3 */

 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
 module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
 module_param_array(enable, bool, NULL, 0444);
 #ifdef CONFIG_PNP
 module_param_array(isapnp, bool, NULL, 0444);
 MODULE_PARM_DESC(isapnp, "PnP detection for specified soundcard.");
 #endif
 MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
 module_param_hw_array(port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
 module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(mpu_port, "MPU-401 port # for " CRD_NAME " driver.");
 module_param_hw_array(irq, int, irq, NULL, 0444);
 module_param_hw_array(fm_port, long, ioport, NULL, 0444);
 MODULE_PARM_DESC(fm_port, "FM port # for ES1688 driver.");
 MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
 module_param_hw_array(mpu_irq, int, irq, NULL, 0444);
 MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for " CRD_NAME " driver.");
 module_param_hw_array(dma8, int, dma, NULL, 0444);
 MODULE_PARM_DESC(dma8, "8-bit DMA # for " CRD_NAME " driver.");

 #ifdef CONFIG_PNP
 #define is_isapnp_selected(dev)		isapnp[dev]
 #else
 #define is_isapnp_selected(dev)		0
 #endif

 static int snd_es1688_match(struct device *dev, unsigned int n)
 {
 	return enable[n] && !is_isapnp_selected(n);
 }

 static int snd_es1688_legacy_create(struct snd_card *card,
 				    struct device *dev, unsigned int n)
 {
 	struct snd_es1688 *chip = card->private_data;
 	static const long possible_ports[] = {0x220, 0x240, 0x260};
 	static const int possible_irqs[] = {5, 9, 10, 7, -1};
 	static const int possible_dmas[] = {1, 3, 0, -1};

 	int i, error;

 	if (irq[n] == SNDRV_AUTO_IRQ) {
 		irq[n] = snd_legacy_find_free_irq(possible_irqs);
 		if (irq[n] < 0) {
 			dev_err(dev, "unable to find a free IRQ\n");
 			return -EBUSY;
 		}
 	}
 	if (dma8[n] == SNDRV_AUTO_DMA) {
 		dma8[n] = snd_legacy_find_free_dma(possible_dmas);
 		if (dma8[n] < 0) {
 			dev_err(dev, "unable to find a free DMA\n");
 			return -EBUSY;
 		}
 	}

 	if (port[n] != SNDRV_AUTO_PORT)
 		return snd_es1688_create(card, chip, port[n], mpu_port[n],
 				irq[n], mpu_irq[n], dma8[n], ES1688_HW_AUTO);

 	i = 0;
 	do {
 		port[n] = possible_ports[i];
 		error = snd_es1688_create(card, chip, port[n], mpu_port[n],
 				irq[n], mpu_irq[n], dma8[n], ES1688_HW_AUTO);
 	} while (error < 0 && ++i < ARRAY_SIZE(possible_ports));

 	return error;
 }

 static int snd_es1688_probe(struct snd_card *card, unsigned int n)
 {
 	struct snd_es1688 *chip = card->private_data;
 	struct snd_opl3 *opl3;
 	int error;

 	error = snd_es1688_pcm(card, chip, 0);
 	if (error < 0)
 		return error;

 	error = snd_es1688_mixer(card, chip);
 	if (error < 0)
 		return error;

 	strscpy(card->driver, "ES1688", sizeof(card->driver));
 	strscpy(card->shortname, chip->pcm->name, sizeof(card->shortname));
 	scnprintf(card->longname, sizeof(card->longname),
 		  "%s at 0x%lx, irq %i, dma %i", chip->pcm->name, chip->port,
 		  chip->irq, chip->dma8);

 	if (fm_port[n] == SNDRV_AUTO_PORT)
 		fm_port[n] = port[n];	/* share the same port */

 	if (fm_port[n] > 0) {
 		if (snd_opl3_create(card, fm_port[n], fm_port[n] + 2,
 				OPL3_HW_OPL3, 0, &opl3) < 0)
 			dev_warn(card->dev,
 				 "opl3 not detected at 0x%lx\n", fm_port[n]);
 		else {
 			error =	snd_opl3_hwdep_new(opl3, 0, 1, NULL);
 			if (error < 0)
 				return error;
 		}
 	}

 	if (mpu_irq[n] >= 0 && mpu_irq[n] != SNDRV_AUTO_IRQ &&
 			chip->mpu_port > 0) {
 		error = snd_mpu401_uart_new(card, 0, MPU401_HW_ES1688,
 				chip->mpu_port, 0,
 				mpu_irq[n], NULL);
 		if (error < 0)
 			return error;
 	}

 	return snd_card_register(card);
 }

 static int snd_es1688_isa_probe(struct device *dev, unsigned int n)
 {
 	struct snd_card *card;
 	int error;

 	error = snd_devm_card_new(dev, index[n], id[n], THIS_MODULE,
 				  sizeof(struct snd_es1688), &card);
 	if (error < 0)
 		return error;

 	error = snd_es1688_legacy_create(card, dev, n);
 	if (error < 0)
 		return error;

 	error = snd_es1688_probe(card, n);
 	if (error < 0)
 		return error;

 	dev_set_drvdata(dev, card);

 	return 0;
 }

 static struct isa_driver snd_es1688_driver = {
 	.match		= snd_es1688_match,
 	.probe		= snd_es1688_isa_probe,
 #if 0	/* FIXME */
 	.suspend	= snd_es1688_suspend,
 	.resume		= snd_es1688_resume,
 #endif
 	.driver		= {
 		.name	= DEV_NAME
 	}
 };

 static int snd_es968_pnp_is_probed;

 #ifdef CONFIG_PNP
 static int snd_card_es968_pnp(struct snd_card *card, unsigned int n,
 			      struct pnp_card_link *pcard,
 			      const struct pnp_card_device_id *pid)
 {
 	struct snd_es1688 *chip = card->private_data;
 	struct pnp_dev *pdev;
 	int error;

 	pdev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
 	if (pdev == NULL)
 		return -ENODEV;

 	error = pnp_activate_dev(pdev);
 	if (error < 0) {
 		dev_err(card->dev, "ES968 pnp configure failure\n");
 		return error;
 	}
 	port[n] = pnp_port_start(pdev, 0);
 	dma8[n] = pnp_dma(pdev, 0);
 	irq[n] = pnp_irq(pdev, 0);

 	return snd_es1688_create(card, chip, port[n], mpu_port[n], irq[n],
 				 mpu_irq[n], dma8[n], ES1688_HW_AUTO);
 }

 static int snd_es968_pnp_detect(struct pnp_card_link *pcard,
 				const struct pnp_card_device_id *pid)
 {
 	struct snd_card *card;
 	static unsigned int dev;
 	int error;

 	if (snd_es968_pnp_is_probed)
 		return -EBUSY;
 	for ( ; dev < SNDRV_CARDS; dev++) {
 		if (enable[dev] && isapnp[dev])
 			break;
 	}
 	if (dev == SNDRV_CARDS)
 		return -ENODEV;

 	error = snd_devm_card_new(&pcard->card->dev,
 				  index[dev], id[dev], THIS_MODULE,
 				  sizeof(struct snd_es1688), &card);
 	if (error < 0)
 		return error;

 	error = snd_card_es968_pnp(card, dev, pcard, pid);
 	if (error < 0)
 		return error;
 	error = snd_es1688_probe(card, dev);
 	if (error < 0)
 		return error;
 	pnp_set_card_drvdata(pcard, card);
 	snd_es968_pnp_is_probed = 1;
 	return 0;
 }

 static void snd_es968_pnp_remove(struct pnp_card_link *pcard)
 {
 	snd_es968_pnp_is_probed = 0;
 }

 #ifdef CONFIG_PM
 static int snd_es968_pnp_suspend(struct pnp_card_link *pcard,
 				 pm_message_t state)
 {
 	struct snd_card *card = pnp_get_card_drvdata(pcard);

 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 	return 0;
 }

 static int snd_es968_pnp_resume(struct pnp_card_link *pcard)
 {
 	struct snd_card *card = pnp_get_card_drvdata(pcard);
 	struct snd_es1688 *chip = card->private_data;

 	snd_es1688_reset(chip);
 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 	return 0;
 }
 #endif

 static const struct pnp_card_device_id snd_es968_pnpids[] = {
 	{ .id = "ESS0968", .devs = { { "@@@0968" }, } },
 	{ .id = "ESS0968", .devs = { { "ESS0968" }, } },
 	{ .id = "", } /* end */
 };

 MODULE_DEVICE_TABLE(pnp_card, snd_es968_pnpids);

 static struct pnp_card_driver es968_pnpc_driver = {
 	.flags		= PNP_DRIVER_RES_DISABLE,
 	.name		= DEV_NAME " PnP",
 	.id_table	= snd_es968_pnpids,
 	.probe		= snd_es968_pnp_detect,
 	.remove		= snd_es968_pnp_remove,
 #ifdef CONFIG_PM
 	.suspend	= snd_es968_pnp_suspend,
 	.resume		= snd_es968_pnp_resume,
 #endif
 };
 #endif

 static int __init alsa_card_es1688_init(void)
 {
 #ifdef CONFIG_PNP
 	pnp_register_card_driver(&es968_pnpc_driver);
 	if (snd_es968_pnp_is_probed)
 		return 0;
 	pnp_unregister_card_driver(&es968_pnpc_driver);
 #endif
 	return isa_register_driver(&snd_es1688_driver, SNDRV_CARDS);
 }

 static void __exit alsa_card_es1688_exit(void)
 {
 	if (!snd_es968_pnp_is_probed) {
 		isa_unregister_driver(&snd_es1688_driver);
 		return;
 	}
 #ifdef CONFIG_PNP
 	pnp_unregister_card_driver(&es968_pnpc_driver);
 #endif
 }

 module_init(alsa_card_es1688_init);
 module_exit(alsa_card_es1688_exit);
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Driver for generic ESS AudioDrive ESx688 soundcards
	* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
	*/

	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/isa.h>
	#include <linux/isapnp.h>
	#include <linux/time.h>
	#include <linux/wait.h>
	#include <linux/module.h>
	#include <asm/dma.h>
	#include <sound/core.h>
	#include <sound/es1688.h>
	#include <sound/mpu401.h>
	#include <sound/opl3.h>
	#define SNDRV_LEGACY_FIND_FREE_IRQ
	#define SNDRV_LEGACY_FIND_FREE_DMA
	#include <sound/initval.h>

	#define CRD_NAME "Generic ESS ES1688/ES688 AudioDrive"
	#define DEV_NAME "es1688"

	MODULE_DESCRIPTION(CRD_NAME);
	MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("snd_es968");

	static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
	static char id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; / ID for this card */
	#ifdef CONFIG_PNP
	static bool isapnp[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_ISAPNP;
	#endif
	static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
	static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x220,0x240,0x260 */
	static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* Usually 0x388 */
	static long mpu_port[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};
	static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5,7,9,10 */
	static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5,7,9,10 */
	static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 0,1,3 */

	module_param_array(index, int, NULL, 0444);
	MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
	module_param_array(id, charp, NULL, 0444);
	MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
	module_param_array(enable, bool, NULL, 0444);
	#ifdef CONFIG_PNP
	module_param_array(isapnp, bool, NULL, 0444);
	MODULE_PARM_DESC(isapnp, "PnP detection for specified soundcard.");
	#endif
	MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
	module_param_hw_array(port, long, ioport, NULL, 0444);
	MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
	module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
	MODULE_PARM_DESC(mpu_port, "MPU-401 port # for " CRD_NAME " driver.");
	module_param_hw_array(irq, int, irq, NULL, 0444);
	module_param_hw_array(fm_port, long, ioport, NULL, 0444);
	MODULE_PARM_DESC(fm_port, "FM port # for ES1688 driver.");
	MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
	module_param_hw_array(mpu_irq, int, irq, NULL, 0444);
	MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for " CRD_NAME " driver.");
	module_param_hw_array(dma8, int, dma, NULL, 0444);
	MODULE_PARM_DESC(dma8, "8-bit DMA # for " CRD_NAME " driver.");

	#ifdef CONFIG_PNP
	#define is_isapnp_selected(dev) isapnp[dev]
	#else
	#define is_isapnp_selected(dev) 0
	#endif

	static int snd_es1688_match(struct device *dev, unsigned int n)
	{
	return enable[n] && !is_isapnp_selected(n);
	}

	static int snd_es1688_legacy_create(struct snd_card *card,
	struct device *dev, unsigned int n)
	{
	struct snd_es1688 *chip = card->private_data;
	static const long possible_ports[] = {0x220, 0x240, 0x260};
	static const int possible_irqs[] = {5, 9, 10, 7, -1};
	static const int possible_dmas[] = {1, 3, 0, -1};

	int i, error;

	if (irq[n] == SNDRV_AUTO_IRQ) {
	irq[n] = snd_legacy_find_free_irq(possible_irqs);
	if (irq[n] < 0) {
	dev_err(dev, "unable to find a free IRQ\n");
	return -EBUSY;
	}
	}
	if (dma8[n] == SNDRV_AUTO_DMA) {
	dma8[n] = snd_legacy_find_free_dma(possible_dmas);
	if (dma8[n] < 0) {
	dev_err(dev, "unable to find a free DMA\n");
	return -EBUSY;
	}
	}

	if (port[n] != SNDRV_AUTO_PORT)
	return snd_es1688_create(card, chip, port[n], mpu_port[n],
	irq[n], mpu_irq[n], dma8[n], ES1688_HW_AUTO);

	i = 0;
	do {
	port[n] = possible_ports[i];
	error = snd_es1688_create(card, chip, port[n], mpu_port[n],
	irq[n], mpu_irq[n], dma8[n], ES1688_HW_AUTO);
	} while (error < 0 && ++i < ARRAY_SIZE(possible_ports));

	return error;
	}

	static int snd_es1688_probe(struct snd_card *card, unsigned int n)
	{
	struct snd_es1688 *chip = card->private_data;
	struct snd_opl3 *opl3;
	int error;

	error = snd_es1688_pcm(card, chip, 0);
	if (error < 0)
	return error;

	error = snd_es1688_mixer(card, chip);
	if (error < 0)
	return error;

	strscpy(card->driver, "ES1688", sizeof(card->driver));
	strscpy(card->shortname, chip->pcm->name, sizeof(card->shortname));
	scnprintf(card->longname, sizeof(card->longname),
	"%s at 0x%lx, irq %i, dma %i", chip->pcm->name, chip->port,
	chip->irq, chip->dma8);

	if (fm_port[n] == SNDRV_AUTO_PORT)
	fm_port[n] = port[n]; /* share the same port */

	if (fm_port[n] > 0) {
	if (snd_opl3_create(card, fm_port[n], fm_port[n] + 2,
	OPL3_HW_OPL3, 0, &opl3) < 0)
	dev_warn(card->dev,
	"opl3 not detected at 0x%lx\n", fm_port[n]);
	else {
	error = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
	if (error < 0)
	return error;
	}
	}

	if (mpu_irq[n] >= 0 && mpu_irq[n] != SNDRV_AUTO_IRQ &&
	chip->mpu_port > 0) {
	error = snd_mpu401_uart_new(card, 0, MPU401_HW_ES1688,
	chip->mpu_port, 0,
	mpu_irq[n], NULL);
	if (error < 0)
	return error;
	}

	return snd_card_register(card);
	}

	static int snd_es1688_isa_probe(struct device *dev, unsigned int n)
	{
	struct snd_card *card;
	int error;

	error = snd_devm_card_new(dev, index[n], id[n], THIS_MODULE,
	sizeof(struct snd_es1688), &card);
	if (error < 0)
	return error;

	error = snd_es1688_legacy_create(card, dev, n);
	if (error < 0)
	return error;

	error = snd_es1688_probe(card, n);
	if (error < 0)
	return error;

	dev_set_drvdata(dev, card);

	return 0;
	}

	static struct isa_driver snd_es1688_driver = {
	.match = snd_es1688_match,
	.probe = snd_es1688_isa_probe,
	#if 0 /* FIXME */
	.suspend = snd_es1688_suspend,
	.resume = snd_es1688_resume,
	#endif
	.driver = {
	.name = DEV_NAME
	}
	};

	static int snd_es968_pnp_is_probed;

	#ifdef CONFIG_PNP
	static int snd_card_es968_pnp(struct snd_card *card, unsigned int n,
	struct pnp_card_link *pcard,
	const struct pnp_card_device_id *pid)
	{
	struct snd_es1688 *chip = card->private_data;
	struct pnp_dev *pdev;
	int error;

	pdev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
	if (pdev == NULL)
	return -ENODEV;

	error = pnp_activate_dev(pdev);
	if (error < 0) {
	dev_err(card->dev, "ES968 pnp configure failure\n");
	return error;
	}
	port[n] = pnp_port_start(pdev, 0);
	dma8[n] = pnp_dma(pdev, 0);
	irq[n] = pnp_irq(pdev, 0);

	return snd_es1688_create(card, chip, port[n], mpu_port[n], irq[n],
	mpu_irq[n], dma8[n], ES1688_HW_AUTO);
	}

	static int snd_es968_pnp_detect(struct pnp_card_link *pcard,
	const struct pnp_card_device_id *pid)
	{
	struct snd_card *card;
	static unsigned int dev;
	int error;

	if (snd_es968_pnp_is_probed)
	return -EBUSY;
	for ( ; dev < SNDRV_CARDS; dev++) {
	if (enable[dev] && isapnp[dev])
	break;
	}
	if (dev == SNDRV_CARDS)
	return -ENODEV;

	error = snd_devm_card_new(&pcard->card->dev,
	index[dev], id[dev], THIS_MODULE,
	sizeof(struct snd_es1688), &card);
	if (error < 0)
	return error;

	error = snd_card_es968_pnp(card, dev, pcard, pid);
	if (error < 0)
	return error;
	error = snd_es1688_probe(card, dev);
	if (error < 0)
	return error;
	pnp_set_card_drvdata(pcard, card);
	snd_es968_pnp_is_probed = 1;
	return 0;
	}

	static void snd_es968_pnp_remove(struct pnp_card_link *pcard)
	{
	snd_es968_pnp_is_probed = 0;
	}

	#ifdef CONFIG_PM
	static int snd_es968_pnp_suspend(struct pnp_card_link *pcard,
	pm_message_t state)
	{
	struct snd_card *card = pnp_get_card_drvdata(pcard);

	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	return 0;
	}

	static int snd_es968_pnp_resume(struct pnp_card_link *pcard)
	{
	struct snd_card *card = pnp_get_card_drvdata(pcard);
	struct snd_es1688 *chip = card->private_data;

	snd_es1688_reset(chip);
	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
	}
	#endif

	static const struct pnp_card_device_id snd_es968_pnpids[] = {
	{ .id = "ESS0968", .devs = { { "@@@0968" }, } },
	{ .id = "ESS0968", .devs = { { "ESS0968" }, } },
	{ .id = "", } /* end */
	};

	MODULE_DEVICE_TABLE(pnp_card, snd_es968_pnpids);

	static struct pnp_card_driver es968_pnpc_driver = {
	.flags = PNP_DRIVER_RES_DISABLE,
	.name = DEV_NAME " PnP",
	.id_table = snd_es968_pnpids,
	.probe = snd_es968_pnp_detect,
	.remove = snd_es968_pnp_remove,
	#ifdef CONFIG_PM
	.suspend = snd_es968_pnp_suspend,
	.resume = snd_es968_pnp_resume,
	#endif
	};
	#endif

	static int __init alsa_card_es1688_init(void)
	{
	#ifdef CONFIG_PNP
	pnp_register_card_driver(&es968_pnpc_driver);
	if (snd_es968_pnp_is_probed)
	return 0;
	pnp_unregister_card_driver(&es968_pnpc_driver);
	#endif
	return isa_register_driver(&snd_es1688_driver, SNDRV_CARDS);
	}

	static void __exit alsa_card_es1688_exit(void)
	{
	if (!snd_es968_pnp_is_probed) {
	isa_unregister_driver(&snd_es1688_driver);
	return;
	}
	#ifdef CONFIG_PNP
	pnp_unregister_card_driver(&es968_pnpc_driver);
	#endif
	}

	module_init(alsa_card_es1688_init);
	module_exit(alsa_card_es1688_exit);