sound/pci/cs5535audio/cs5535audio.c - third_party/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Driver for audio on multifunction CS5535/6 companion device
  * Copyright (C) Jaya Kumar
  *
  * Based on Jaroslav Kysela and Takashi Iwai's examples.
  * This work was sponsored by CIS(M) Sdn Bhd.
  */

 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/io.h>
 #include <sound/core.h>
 #include <sound/control.h>
 #include <sound/pcm.h>
 #include <sound/rawmidi.h>
 #include <sound/ac97_codec.h>
 #include <sound/initval.h>
 #include <sound/asoundef.h>
 #include "cs5535audio.h"

 #define DRIVER_NAME "cs5535audio"

 static char *ac97_quirk;
 module_param(ac97_quirk, charp, 0444);
 MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");

 static const struct ac97_quirk ac97_quirks[] = {
 #if 0 /* Not yet confirmed if all 5536 boards are HP only */
 	{
 		.subvendor = PCI_VENDOR_ID_AMD,
 		.subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
 		.name = "AMD RDK",
 		.type = AC97_TUNE_HP_ONLY
 	},
 #endif
 	{}
 };

 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
 module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);

 static const struct pci_device_id snd_cs5535audio_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
 	{}
 };

 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);

 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
 {
 	unsigned int tmp;
 	do {
 		tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
 		if (!(tmp & CMD_NEW))
 			break;
 		udelay(1);
 	} while (--timeout);
 	if (!timeout)
 		dev_err(cs5535au->card->dev,
 			"Failure writing to cs5535 codec\n");
 }

 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
 						 unsigned short reg)
 {
 	unsigned int regdata;
 	unsigned int timeout;
 	unsigned int val;

 	regdata = ((unsigned int) reg) << 24;
 	regdata |= ACC_CODEC_CNTL_RD_CMD;
 	regdata |= CMD_NEW;

 	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
 	wait_till_cmd_acked(cs5535au, 50);

 	timeout = 50;
 	do {
 		val = cs_readl(cs5535au, ACC_CODEC_STATUS);
 		if ((val & STS_NEW) && reg == (val >> 24))
 			break;
 		udelay(1);
 	} while (--timeout);
 	if (!timeout)
 		dev_err(cs5535au->card->dev,
 			"Failure reading codec reg 0x%x, Last value=0x%x\n",
 			reg, val);

 	return (unsigned short) val;
 }

 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
 					unsigned short reg, unsigned short val)
 {
 	unsigned int regdata;

 	regdata = ((unsigned int) reg) << 24;
 	regdata |= val;
 	regdata &= CMD_MASK;
 	regdata |= CMD_NEW;
 	regdata &= ACC_CODEC_CNTL_WR_CMD;

 	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
 	wait_till_cmd_acked(cs5535au, 50);
 }

 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
 					     unsigned short reg, unsigned short val)
 {
 	struct cs5535audio *cs5535au = ac97->private_data;
 	snd_cs5535audio_codec_write(cs5535au, reg, val);
 }

 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
 						      unsigned short reg)
 {
 	struct cs5535audio *cs5535au = ac97->private_data;
 	return snd_cs5535audio_codec_read(cs5535au, reg);
 }

 static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
 {
 	struct snd_card *card = cs5535au->card;
 	struct snd_ac97_bus *pbus;
 	struct snd_ac97_template ac97;
 	int err;
 	static struct snd_ac97_bus_ops ops = {
 		.write = snd_cs5535audio_ac97_codec_write,
 		.read = snd_cs5535audio_ac97_codec_read,
 	};

 	if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
 		return err;

 	memset(&ac97, 0, sizeof(ac97));
 	ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
 			| AC97_SCAP_POWER_SAVE;
 	ac97.private_data = cs5535au;
 	ac97.pci = cs5535au->pci;

 	/* set any OLPC-specific scaps */
 	olpc_prequirks(card, &ac97);

 	if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
 		dev_err(card->dev, "mixer failed\n");
 		return err;
 	}

 	snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);

 	err = olpc_quirks(card, cs5535au->ac97);
 	if (err < 0) {
 		dev_err(card->dev, "olpc quirks failed\n");
 		return err;
 	}

 	return 0;
 }

 static void process_bm0_irq(struct cs5535audio *cs5535au)
 {
 	u8 bm_stat;
 	spin_lock(&cs5535au->reg_lock);
 	bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
 	spin_unlock(&cs5535au->reg_lock);
 	if (bm_stat & EOP) {
 		snd_pcm_period_elapsed(cs5535au->playback_substream);
 	} else {
 		dev_err(cs5535au->card->dev,
 			"unexpected bm0 irq src, bm_stat=%x\n",
 			bm_stat);
 	}
 }

 static void process_bm1_irq(struct cs5535audio *cs5535au)
 {
 	u8 bm_stat;
 	spin_lock(&cs5535au->reg_lock);
 	bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
 	spin_unlock(&cs5535au->reg_lock);
 	if (bm_stat & EOP)
 		snd_pcm_period_elapsed(cs5535au->capture_substream);
 }

 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
 {
 	u16 acc_irq_stat;
 	unsigned char count;
 	struct cs5535audio *cs5535au = dev_id;

 	if (cs5535au == NULL)
 		return IRQ_NONE;

 	acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);

 	if (!acc_irq_stat)
 		return IRQ_NONE;
 	for (count = 0; count < 4; count++) {
 		if (acc_irq_stat & (1 << count)) {
 			switch (count) {
 			case IRQ_STS:
 				cs_readl(cs5535au, ACC_GPIO_STATUS);
 				break;
 			case WU_IRQ_STS:
 				cs_readl(cs5535au, ACC_GPIO_STATUS);
 				break;
 			case BM0_IRQ_STS:
 				process_bm0_irq(cs5535au);
 				break;
 			case BM1_IRQ_STS:
 				process_bm1_irq(cs5535au);
 				break;
 			default:
 				dev_err(cs5535au->card->dev,
 					"Unexpected irq src: 0x%x\n",
 					acc_irq_stat);
 				break;
 			}
 		}
 	}
 	return IRQ_HANDLED;
 }

 static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
 {
 	synchronize_irq(cs5535au->irq);
 	pci_set_power_state(cs5535au->pci, PCI_D3hot);

 	if (cs5535au->irq >= 0)
 		free_irq(cs5535au->irq, cs5535au);

 	pci_release_regions(cs5535au->pci);
 	pci_disable_device(cs5535au->pci);
 	kfree(cs5535au);
 	return 0;
 }

 static int snd_cs5535audio_dev_free(struct snd_device *device)
 {
 	struct cs5535audio *cs5535au = device->device_data;
 	return snd_cs5535audio_free(cs5535au);
 }

 static int snd_cs5535audio_create(struct snd_card *card,
 				  struct pci_dev *pci,
 				  struct cs5535audio **rcs5535au)
 {
 	struct cs5535audio *cs5535au;

 	int err;
 	static struct snd_device_ops ops = {
 		.dev_free =	snd_cs5535audio_dev_free,
 	};

 	*rcs5535au = NULL;
 	if ((err = pci_enable_device(pci)) < 0)
 		return err;

 	if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0 ||
 	    dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) {
 		dev_warn(card->dev, "unable to get 32bit dma\n");
 		err = -ENXIO;
 		goto pcifail;
 	}

 	cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
 	if (cs5535au == NULL) {
 		err = -ENOMEM;
 		goto pcifail;
 	}

 	spin_lock_init(&cs5535au->reg_lock);
 	cs5535au->card = card;
 	cs5535au->pci = pci;
 	cs5535au->irq = -1;

 	if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
 		kfree(cs5535au);
 		goto pcifail;
 	}

 	cs5535au->port = pci_resource_start(pci, 0);

 	if (request_irq(pci->irq, snd_cs5535audio_interrupt,
 			IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
 		err = -EBUSY;
 		goto sndfail;
 	}

 	cs5535au->irq = pci->irq;
 	pci_set_master(pci);

 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 				  cs5535au, &ops)) < 0)
 		goto sndfail;

 	*rcs5535au = cs5535au;
 	return 0;

 sndfail: /* leave the device alive, just kill the snd */
 	snd_cs5535audio_free(cs5535au);
 	return err;

 pcifail:
 	pci_disable_device(pci);
 	return err;
 }

 static int snd_cs5535audio_probe(struct pci_dev *pci,
 				 const struct pci_device_id *pci_id)
 {
 	static int dev;
 	struct snd_card *card;
 	struct cs5535audio *cs5535au;
 	int err;

 	if (dev >= SNDRV_CARDS)
 		return -ENODEV;
 	if (!enable[dev]) {
 		dev++;
 		return -ENOENT;
 	}

 	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 			   0, &card);
 	if (err < 0)
 		return err;

 	if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
 		goto probefail_out;

 	card->private_data = cs5535au;

 	if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
 		goto probefail_out;

 	if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
 		goto probefail_out;

 	strcpy(card->driver, DRIVER_NAME);

 	strcpy(card->shortname, "CS5535 Audio");
 	sprintf(card->longname, "%s %s at 0x%lx, irq %i",
 		card->shortname, card->driver,
 		cs5535au->port, cs5535au->irq);

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

 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;

 probefail_out:
 	snd_card_free(card);
 	return err;
 }

 static void snd_cs5535audio_remove(struct pci_dev *pci)
 {
 	olpc_quirks_cleanup();
 	snd_card_free(pci_get_drvdata(pci));
 }

 static struct pci_driver cs5535audio_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_cs5535audio_ids,
 	.probe = snd_cs5535audio_probe,
 	.remove = snd_cs5535audio_remove,
 #ifdef CONFIG_PM_SLEEP
 	.driver = {
 		.pm = &snd_cs5535audio_pm,
 	},
 #endif
 };

 module_pci_driver(cs5535audio_driver);

 MODULE_AUTHOR("Jaya Kumar");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("CS5535 Audio");
 MODULE_SUPPORTED_DEVICE("CS5535 Audio");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Driver for audio on multifunction CS5535/6 companion device
	* Copyright (C) Jaya Kumar
	*
	* Based on Jaroslav Kysela and Takashi Iwai's examples.
	* This work was sponsored by CIS(M) Sdn Bhd.
	*/

	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/init.h>
	#include <linux/pci.h>
	#include <linux/slab.h>
	#include <linux/module.h>
	#include <linux/io.h>
	#include <sound/core.h>
	#include <sound/control.h>
	#include <sound/pcm.h>
	#include <sound/rawmidi.h>
	#include <sound/ac97_codec.h>
	#include <sound/initval.h>
	#include <sound/asoundef.h>
	#include "cs5535audio.h"

	#define DRIVER_NAME "cs5535audio"

	static char *ac97_quirk;
	module_param(ac97_quirk, charp, 0444);
	MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");

	static const struct ac97_quirk ac97_quirks[] = {
	#if 0 /* Not yet confirmed if all 5536 boards are HP only */
	{
	.subvendor = PCI_VENDOR_ID_AMD,
	.subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
	.name = "AMD RDK",
	.type = AC97_TUNE_HP_ONLY
	},
	#endif
	{}
	};

	static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
	static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
	static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

	module_param_array(index, int, NULL, 0444);
	MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
	module_param_array(id, charp, NULL, 0444);
	MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
	module_param_array(enable, bool, NULL, 0444);
	MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);

	static const struct pci_device_id snd_cs5535audio_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
	{}
	};

	MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);

	static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
	{
	unsigned int tmp;
	do {
	tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
	if (!(tmp & CMD_NEW))
	break;
	udelay(1);
	} while (--timeout);
	if (!timeout)
	dev_err(cs5535au->card->dev,
	"Failure writing to cs5535 codec\n");
	}

	static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
	unsigned short reg)
	{
	unsigned int regdata;
	unsigned int timeout;
	unsigned int val;

	regdata = ((unsigned int) reg) << 24;
	regdata \|= ACC_CODEC_CNTL_RD_CMD;
	regdata \|= CMD_NEW;

	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
	wait_till_cmd_acked(cs5535au, 50);

	timeout = 50;
	do {
	val = cs_readl(cs5535au, ACC_CODEC_STATUS);
	if ((val & STS_NEW) && reg == (val >> 24))
	break;
	udelay(1);
	} while (--timeout);
	if (!timeout)
	dev_err(cs5535au->card->dev,
	"Failure reading codec reg 0x%x, Last value=0x%x\n",
	reg, val);

	return (unsigned short) val;
	}

	static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
	unsigned short reg, unsigned short val)
	{
	unsigned int regdata;

	regdata = ((unsigned int) reg) << 24;
	regdata \|= val;
	regdata &= CMD_MASK;
	regdata \|= CMD_NEW;
	regdata &= ACC_CODEC_CNTL_WR_CMD;

	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
	wait_till_cmd_acked(cs5535au, 50);
	}

	static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
	unsigned short reg, unsigned short val)
	{
	struct cs5535audio *cs5535au = ac97->private_data;
	snd_cs5535audio_codec_write(cs5535au, reg, val);
	}

	static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
	unsigned short reg)
	{
	struct cs5535audio *cs5535au = ac97->private_data;
	return snd_cs5535audio_codec_read(cs5535au, reg);
	}

	static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
	{
	struct snd_card *card = cs5535au->card;
	struct snd_ac97_bus *pbus;
	struct snd_ac97_template ac97;
	int err;
	static struct snd_ac97_bus_ops ops = {
	.write = snd_cs5535audio_ac97_codec_write,
	.read = snd_cs5535audio_ac97_codec_read,
	};

	if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
	return err;

	memset(&ac97, 0, sizeof(ac97));
	ac97.scaps = AC97_SCAP_AUDIO \| AC97_SCAP_SKIP_MODEM
	\| AC97_SCAP_POWER_SAVE;
	ac97.private_data = cs5535au;
	ac97.pci = cs5535au->pci;

	/* set any OLPC-specific scaps */
	olpc_prequirks(card, &ac97);

	if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
	dev_err(card->dev, "mixer failed\n");
	return err;
	}

	snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);

	err = olpc_quirks(card, cs5535au->ac97);
	if (err < 0) {
	dev_err(card->dev, "olpc quirks failed\n");
	return err;
	}

	return 0;
	}

	static void process_bm0_irq(struct cs5535audio *cs5535au)
	{
	u8 bm_stat;
	spin_lock(&cs5535au->reg_lock);
	bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
	spin_unlock(&cs5535au->reg_lock);
	if (bm_stat & EOP) {
	snd_pcm_period_elapsed(cs5535au->playback_substream);
	} else {
	dev_err(cs5535au->card->dev,
	"unexpected bm0 irq src, bm_stat=%x\n",
	bm_stat);
	}
	}

	static void process_bm1_irq(struct cs5535audio *cs5535au)
	{
	u8 bm_stat;
	spin_lock(&cs5535au->reg_lock);
	bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
	spin_unlock(&cs5535au->reg_lock);
	if (bm_stat & EOP)
	snd_pcm_period_elapsed(cs5535au->capture_substream);
	}

	static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
	{
	u16 acc_irq_stat;
	unsigned char count;
	struct cs5535audio *cs5535au = dev_id;

	if (cs5535au == NULL)
	return IRQ_NONE;

	acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);

	if (!acc_irq_stat)
	return IRQ_NONE;
	for (count = 0; count < 4; count++) {
	if (acc_irq_stat & (1 << count)) {
	switch (count) {
	case IRQ_STS:
	cs_readl(cs5535au, ACC_GPIO_STATUS);
	break;
	case WU_IRQ_STS:
	cs_readl(cs5535au, ACC_GPIO_STATUS);
	break;
	case BM0_IRQ_STS:
	process_bm0_irq(cs5535au);
	break;
	case BM1_IRQ_STS:
	process_bm1_irq(cs5535au);
	break;
	default:
	dev_err(cs5535au->card->dev,
	"Unexpected irq src: 0x%x\n",
	acc_irq_stat);
	break;
	}
	}
	}
	return IRQ_HANDLED;
	}

	static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
	{
	synchronize_irq(cs5535au->irq);
	pci_set_power_state(cs5535au->pci, PCI_D3hot);

	if (cs5535au->irq >= 0)
	free_irq(cs5535au->irq, cs5535au);

	pci_release_regions(cs5535au->pci);
	pci_disable_device(cs5535au->pci);
	kfree(cs5535au);
	return 0;
	}

	static int snd_cs5535audio_dev_free(struct snd_device *device)
	{
	struct cs5535audio *cs5535au = device->device_data;
	return snd_cs5535audio_free(cs5535au);
	}

	static int snd_cs5535audio_create(struct snd_card *card,
	struct pci_dev *pci,
	struct cs5535audio **rcs5535au)
	{
	struct cs5535audio *cs5535au;

	int err;
	static struct snd_device_ops ops = {
	.dev_free = snd_cs5535audio_dev_free,
	};

	*rcs5535au = NULL;
	if ((err = pci_enable_device(pci)) < 0)
	return err;

	if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0 \|\|
	dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) {
	dev_warn(card->dev, "unable to get 32bit dma\n");
	err = -ENXIO;
	goto pcifail;
	}

	cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
	if (cs5535au == NULL) {
	err = -ENOMEM;
	goto pcifail;
	}

	spin_lock_init(&cs5535au->reg_lock);
	cs5535au->card = card;
	cs5535au->pci = pci;
	cs5535au->irq = -1;

	if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
	kfree(cs5535au);
	goto pcifail;
	}

	cs5535au->port = pci_resource_start(pci, 0);

	if (request_irq(pci->irq, snd_cs5535audio_interrupt,
	IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
	dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
	err = -EBUSY;
	goto sndfail;
	}

	cs5535au->irq = pci->irq;
	pci_set_master(pci);

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
	cs5535au, &ops)) < 0)
	goto sndfail;

	*rcs5535au = cs5535au;
	return 0;

	sndfail: /* leave the device alive, just kill the snd */
	snd_cs5535audio_free(cs5535au);
	return err;

	pcifail:
	pci_disable_device(pci);
	return err;
	}

	static int snd_cs5535audio_probe(struct pci_dev *pci,
	const struct pci_device_id *pci_id)
	{
	static int dev;
	struct snd_card *card;
	struct cs5535audio *cs5535au;
	int err;

	if (dev >= SNDRV_CARDS)
	return -ENODEV;
	if (!enable[dev]) {
	dev++;
	return -ENOENT;
	}

	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
	0, &card);
	if (err < 0)
	return err;

	if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
	goto probefail_out;

	card->private_data = cs5535au;

	if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
	goto probefail_out;

	if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
	goto probefail_out;

	strcpy(card->driver, DRIVER_NAME);

	strcpy(card->shortname, "CS5535 Audio");
	sprintf(card->longname, "%s %s at 0x%lx, irq %i",
	card->shortname, card->driver,
	cs5535au->port, cs5535au->irq);

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

	pci_set_drvdata(pci, card);
	dev++;
	return 0;

	probefail_out:
	snd_card_free(card);
	return err;
	}

	static void snd_cs5535audio_remove(struct pci_dev *pci)
	{
	olpc_quirks_cleanup();
	snd_card_free(pci_get_drvdata(pci));
	}

	static struct pci_driver cs5535audio_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_cs5535audio_ids,
	.probe = snd_cs5535audio_probe,
	.remove = snd_cs5535audio_remove,
	#ifdef CONFIG_PM_SLEEP
	.driver = {
	.pm = &snd_cs5535audio_pm,
	},
	#endif
	};

	module_pci_driver(cs5535audio_driver);

	MODULE_AUTHOR("Jaya Kumar");
	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("CS5535 Audio");
	MODULE_SUPPORTED_DEVICE("CS5535 Audio");