C++ snd_card_new函数代码示例

static int __devinit snd_cs4231_probe(struct device *dev, unsigned int n)
{
    struct snd_card *card;
    struct snd_cs4231 *chip;
    struct snd_pcm *pcm;
    int error;

    card = snd_card_new(index[n], id[n], THIS_MODULE, 0);
    if (!card)
        return -EINVAL;

    error = snd_cs4231_create(card, port[n], -1, irq[n], dma1[n], dma2[n],
            CS4231_HW_DETECT, 0, &chip);
    if (error < 0)
        goto out;

    card->private_data = chip;

    error = snd_cs4231_pcm(chip, 0, &pcm);
    if (error < 0)
        goto out;

    strcpy(card->driver, "CS4231");
    strcpy(card->shortname, pcm->name);

    sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
        pcm->name, chip->port, irq[n], dma1[n]);
    if (dma2[n] >= 0)
        sprintf(card->longname + strlen(card->longname), "&%d", dma2[n]);

    error = snd_cs4231_mixer(chip);
    if (error < 0)
        goto out;

    error = snd_cs4231_timer(chip, 0, NULL);
    if (error < 0)
        goto out;

    if (mpu_port[n] > 0 && mpu_port[n] != SNDRV_AUTO_PORT) {
        if (mpu_irq[n] == SNDRV_AUTO_IRQ)
            mpu_irq[n] = -1;
        if (snd_mpu401_uart_new(card, 0, MPU401_HW_CS4232,
                    mpu_port[n], 0, mpu_irq[n],
                    mpu_irq[n] >= 0 ? IRQF_DISABLED : 0,
                    NULL) < 0)
            printk(KERN_WARNING "%s: MPU401 not detected\n", dev->bus_id);
    }

    snd_card_set_dev(card, dev);

    error = snd_card_register(card);
    if (error < 0)
        goto out;

    dev_set_drvdata(dev, card);
    return 0;

out:    snd_card_free(card);
    return error;
}

static int snd_mpu401_create(int dev, struct snd_card **rcard)
{
	struct snd_card *card;
	int err;

	*rcard = NULL;
	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
	if (card == NULL)
		return -ENOMEM;
	strcpy(card->driver, "MPU-401 UART");
	strcpy(card->shortname, card->driver);
	sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
	if (irq[dev] >= 0) {
		sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
	} else {
		strcat(card->longname, "polled");
	}

	if ((err = snd_mpu401_uart_new(card, 0,
				       MPU401_HW_MPU401,
				       port[dev], 0,
				       irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0, NULL)) < 0) {
		printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
		goto _err;
	}

	*rcard = card;
	return 0;

 _err:
	snd_card_free(card);
	return err;
}

static int hda_tegra_probe(struct platform_device *pdev)
{
	const unsigned int driver_flags = AZX_DCAPS_CORBRP_SELF_CLEAR;
	struct snd_card *card;
	struct azx *chip;
	struct hda_tegra *hda;
	int err;

	hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL);
	if (!hda)
		return -ENOMEM;
	hda->dev = &pdev->dev;
	chip = &hda->chip;

	err = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
			   THIS_MODULE, 0, &card);
	if (err < 0) {
		dev_err(&pdev->dev, "Error creating card!\n");
		return err;
	}

	err = hda_tegra_create(card, driver_flags, hda);
	if (err < 0)
		goto out_free;
	card->private_data = chip;

	dev_set_drvdata(&pdev->dev, card);
	schedule_work(&hda->probe_work);

	return 0;

out_free:
	snd_card_free(card);
	return err;
}

static int __devinit snd_es1688_probe(struct device *dev, unsigned int n)
{
	struct snd_card *card;
	struct snd_es1688 *chip;
	struct snd_opl3 *opl3;
	struct snd_pcm *pcm;
	int error;

	card = snd_card_new(index[n], id[n], THIS_MODULE, 0);
	if (!card)
		return -EINVAL;

	error = snd_es1688_legacy_create(card, dev, n, &chip);
	if (error < 0)
		goto out;

	error = snd_es1688_pcm(chip, 0, &pcm);
	if (error < 0)
		goto out;

	error = snd_es1688_mixer(chip);
	if (error < 0)
		goto out;

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

	if (snd_opl3_create(card, chip->port, chip->port + 2,
			OPL3_HW_OPL3, 0, &opl3) < 0)
		printk(KERN_WARNING "%s: opl3 not detected at 0x%lx\n",
			dev->bus_id, chip->port);
	else {
		error =	snd_opl3_hwdep_new(opl3, 0, 1, NULL);
		if (error < 0)
			goto out;
	}

	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], IRQF_DISABLED, NULL);
		if (error < 0)
			goto out;
	}

	snd_card_set_dev(card, dev);

	error = snd_card_register(card);
	if (error < 0)
		goto out;

	dev_set_drvdata(dev, card);
	return 0;

out:	snd_card_free(card);
	return error;
}

int poseidon_audio_init(struct poseidon *p)
{
	struct poseidon_audio *pa = &p->audio;
	struct snd_card *card;
	struct snd_pcm *pcm;
	int ret;

	ret = snd_card_new(&p->interface->dev, -1, "Telegent",
			   THIS_MODULE, 0, &card);
	if (ret != 0)
		return ret;

	ret = snd_pcm_new(card, "poseidon audio", 0, 0, 1, &pcm);
	if (ret < 0) {
		snd_card_free(card);
		return ret;
	}
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
	pcm->info_flags   = 0;
	pcm->private_data = p;
	strcpy(pcm->name, "poseidon audio capture");

	strcpy(card->driver, "ALSA driver");
	strcpy(card->shortname, "poseidon Audio");
	strcpy(card->longname, "poseidon ALSA Audio");

	if (snd_card_register(card)) {
		snd_card_free(card);
		return -ENOMEM;
	}
	pa->card = card;
	return 0;
}

static int __devinit snd_sscape_probe(struct device *pdev, unsigned int dev)
{
	struct snd_card *card;
	struct soundscape *sscape;
	int ret;

	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
			    sizeof(struct soundscape));
	if (!card)
		return -ENOMEM;

	sscape = get_card_soundscape(card);
	sscape->type = SSCAPE;

	dma[dev] &= 0x03;
	ret = create_sscape(dev, card);
	if (ret < 0)
		goto _release_card;

	snd_card_set_dev(card, pdev);
	if ((ret = snd_card_register(card)) < 0) {
		printk(KERN_ERR "sscape: Failed to register sound card\n");
		goto _release_card;
	}
	dev_set_drvdata(pdev, card);
	return 0;

_release_card:
	snd_card_free(card);
	return ret;
}

static int __devinit snd_atiixp_probe(struct pci_dev *pci,
                                      const struct pci_device_id *pci_id)
{
    static int dev;
    snd_card_t *card;
    atiixp_t *chip;
    unsigned char revision;
    int 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;

    pci_read_config_byte(pci, PCI_REVISION_ID, &revision);

    strcpy(card->driver, spdif_aclink[dev] ? "ATIIXP" : "ATIIXP-SPDMA");
    strcpy(card->shortname, "ATI IXP");
    if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
        goto __error;

    if ((err = snd_atiixp_aclink_reset(chip)) < 0)
        goto __error;

    chip->spdif_over_aclink = spdif_aclink[dev];

    if ((err = snd_atiixp_mixer_new(chip, ac97_clock[dev], ac97_quirk[dev])) < 0)
        goto __error;

    if ((err = snd_atiixp_pcm_new(chip)) < 0)
        goto __error;

    snd_atiixp_proc_init(chip);

    snd_atiixp_chip_start(chip);

    snprintf(card->longname, sizeof(card->longname),
             "%s rev %x with %s at %#lx, irq %i", card->shortname, revision,
             chip->ac97[0] ? snd_ac97_get_short_name(chip->ac97[0]) : "?",
             chip->addr, chip->irq);

    snd_card_set_pm_callback(card, snd_atiixp_suspend, snd_atiixp_resume, chip);

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

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

__error:
    snd_card_free(card);
    return err;
}

static void do_registration(struct work_struct *work)
{
	struct snd_motu *motu = container_of(work, struct snd_motu, dwork.work);
	int err;

	if (motu->registered)
		return;

	err = snd_card_new(&motu->unit->device, -1, NULL, THIS_MODULE, 0,
			   &motu->card);
	if (err < 0)
		return;

	name_card(motu);

	err = snd_motu_transaction_register(motu);
	if (err < 0)
		goto error;

	err = snd_motu_stream_init_duplex(motu);
	if (err < 0)
		goto error;

	snd_motu_proc_init(motu);

	err = snd_motu_create_pcm_devices(motu);
	if (err < 0)
		goto error;

	if (motu->spec->flags & SND_MOTU_SPEC_HAS_MIDI) {
		err = snd_motu_create_midi_devices(motu);
		if (err < 0)
			goto error;
	}

	err = snd_motu_create_hwdep_device(motu);
	if (err < 0)
		goto error;

	err = snd_card_register(motu->card);
	if (err < 0)
		goto error;

	/*
	 * After registered, motu instance can be released corresponding to
	 * releasing the sound card instance.
	 */
	motu->card->private_free = motu_card_free;
	motu->card->private_data = motu;
	motu->registered = true;

	return;
error:
	snd_motu_transaction_unregister(motu);
	snd_card_free(motu->card);
	dev_info(&motu->unit->device,
		 "Sound card registration failed: %d\n", err);
}

static int snd_cs4231_probe(struct device *dev, unsigned int n)
{
	struct snd_card *card;
	struct snd_wss *chip;
	struct snd_pcm *pcm;
	int error;

	error = snd_card_new(dev, index[n], id[n], THIS_MODULE, 0, &card);
	if (error < 0)
		return error;

	error = snd_wss_create(card, port[n], -1, irq[n], dma1[n], dma2[n],
			WSS_HW_DETECT, 0, &chip);
	if (error < 0)
		goto out;

	card->private_data = chip;

	error = snd_wss_pcm(chip, 0, &pcm);
	if (error < 0)
		goto out;

	strcpy(card->driver, "CS4231");
	strcpy(card->shortname, pcm->name);

	sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
		pcm->name, chip->port, irq[n], dma1[n]);
	if (dma2[n] >= 0)
		sprintf(card->longname + strlen(card->longname), "&%d", dma2[n]);

	error = snd_wss_mixer(chip);
	if (error < 0)
		goto out;

	error = snd_wss_timer(chip, 0, NULL);
	if (error < 0)
		goto out;

	if (mpu_port[n] > 0 && mpu_port[n] != SNDRV_AUTO_PORT) {
		if (mpu_irq[n] == SNDRV_AUTO_IRQ)
			mpu_irq[n] = -1;
		if (snd_mpu401_uart_new(card, 0, MPU401_HW_CS4232,
					mpu_port[n], 0, mpu_irq[n],
					NULL) < 0)
			dev_warn(dev, "MPU401 not detected\n");
	}

	error = snd_card_register(card);
	if (error < 0)
		goto out;

	dev_set_drvdata(dev, card);
	return 0;

out:	snd_card_free(card);
	return error;
}

static void do_registration(struct work_struct *work)
{
	struct snd_dg00x *dg00x =
			container_of(work, struct snd_dg00x, dwork.work);
	int err;

	if (dg00x->registered)
		return;

	err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0,
			   &dg00x->card);
	if (err < 0)
		return;

	err = name_card(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_stream_init_duplex(dg00x);
	if (err < 0)
		goto error;

	snd_dg00x_proc_init(dg00x);

	err = snd_dg00x_create_pcm_devices(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_create_midi_devices(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_create_hwdep_device(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_transaction_register(dg00x);
	if (err < 0)
		goto error;

	err = snd_card_register(dg00x->card);
	if (err < 0)
		goto error;

	dg00x->card->private_free = dg00x_card_free;
	dg00x->card->private_data = dg00x;
	dg00x->registered = true;

	return;
error:
	snd_dg00x_transaction_unregister(dg00x);
	snd_dg00x_stream_destroy_duplex(dg00x);
	snd_card_free(dg00x->card);
	dev_info(&dg00x->unit->device,
		 "Sound card registration failed: %d\n", err);
}

static void do_registration(struct work_struct *work)
{
	struct snd_motu *motu = container_of(work, struct snd_motu, dwork.work);
	int err;

	if (motu->registered)
		return;

	err = snd_card_new(&motu->unit->device, -1, NULL, THIS_MODULE, 0,
			   &motu->card);
	if (err < 0)
		return;
	motu->card->private_free = motu_card_free;
	motu->card->private_data = motu;

	name_card(motu);

	err = snd_motu_transaction_register(motu);
	if (err < 0)
		goto error;

	err = snd_motu_stream_init_duplex(motu);
	if (err < 0)
		goto error;

	snd_motu_proc_init(motu);

	err = snd_motu_create_pcm_devices(motu);
	if (err < 0)
		goto error;

	if ((motu->spec->flags & SND_MOTU_SPEC_RX_MIDI_2ND_Q) ||
	    (motu->spec->flags & SND_MOTU_SPEC_RX_MIDI_3RD_Q) ||
	    (motu->spec->flags & SND_MOTU_SPEC_TX_MIDI_2ND_Q) ||
	    (motu->spec->flags & SND_MOTU_SPEC_TX_MIDI_3RD_Q)) {
		err = snd_motu_create_midi_devices(motu);
		if (err < 0)
			goto error;
	}

	err = snd_motu_create_hwdep_device(motu);
	if (err < 0)
		goto error;

	err = snd_card_register(motu->card);
	if (err < 0)
		goto error;

	motu->registered = true;

	return;
error:
	snd_card_free(motu->card);
	dev_info(&motu->unit->device,
		 "Sound card registration failed: %d\n", err);
}

static void do_registration(struct work_struct *work)
{
	struct snd_tscm *tscm = container_of(work, struct snd_tscm, dwork.work);
	int err;

	err = snd_card_new(&tscm->unit->device, -1, NULL, THIS_MODULE, 0,
			   &tscm->card);
	if (err < 0)
		return;

	err = identify_model(tscm);
	if (err < 0)
		goto error;

	err = snd_tscm_transaction_register(tscm);
	if (err < 0)
		goto error;

	err = snd_tscm_stream_init_duplex(tscm);
	if (err < 0)
		goto error;

	snd_tscm_proc_init(tscm);

	err = snd_tscm_create_pcm_devices(tscm);
	if (err < 0)
		goto error;

	err = snd_tscm_create_midi_devices(tscm);
	if (err < 0)
		goto error;

	err = snd_tscm_create_hwdep_device(tscm);
	if (err < 0)
		goto error;

	err = snd_card_register(tscm->card);
	if (err < 0)
		goto error;

	/*
	 * After registered, tscm instance can be released corresponding to
	 * releasing the sound card instance.
	 */
	tscm->card->private_free = tscm_card_free;
	tscm->card->private_data = tscm;
	tscm->registered = true;

	return;
error:
	snd_tscm_transaction_unregister(tscm);
	snd_tscm_stream_destroy_duplex(tscm);
	snd_card_free(tscm->card);
	dev_info(&tscm->unit->device,
		 "Sound card registration failed: %d\n", err);
}

static int __devinit brcm_alsa_omx_probe(struct platform_device *pdev)
{
    struct snd_card *card;
    int err;

    DEBUG("\n %lx:probe \n",jiffies);

    err = -ENODEV;
    if (!enable)
        return err;

    err = -ENOMEM;
    card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
                        THIS_MODULE, sizeof(brcm_alsa_chip_t));
    if (!card)
        goto err;

    g_brcm_alsa_chip = (brcm_alsa_chip_t*)card->private_data;
    g_brcm_alsa_chip->card = card;

    card->dev = &pdev->dev;
    strncpy(card->driver, pdev->dev.driver->name, sizeof(card->driver));

    //PCM interface
    err = brcm_alsa_omx_pcm_new(card);
    if (err)
        goto err;

    //CTRL interface
    err = brcm_alsa_omx_ctl_new(card);
    if (err)
        goto err;

    //TODO: other interface


    strcpy(card->driver, "Broadcom");
    strcpy(card->shortname, "Broadcom ALSA");
    sprintf(card->longname, "Broadcom ALSA PCM %i", 0);


    err = snd_card_register(card);
    if (err==0)
    {
        platform_set_drvdata(pdev, card);
        return 0;
    }

err:
    DEBUG("\n probe failed =%d\n",err);
    if (card)
        snd_card_free(card);

    g_brcm_alsa_chip=NULL;
    return err;
}

static int snd_via82xx_probe(struct pci_dev *pci,
			     const struct pci_device_id *pci_id)
{
	struct snd_card *card;
	struct via82xx_modem *chip;
	int chip_type = 0, card_type;
	unsigned int i;
	int err;

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

	card_type = pci_id->driver_data;
	switch (card_type) {
	case TYPE_CARD_VIA82XX_MODEM:
		strcpy(card->driver, "VIA82XX-MODEM");
		sprintf(card->shortname, "VIA 82XX modem");
		break;
	default:
		dev_err(card->dev, "invalid card type %d\n", card_type);
		err = -EINVAL;
		goto __error;
	}
		
	if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
				      ac97_clock, &chip)) < 0)
		goto __error;
	card->private_data = chip;
	if ((err = snd_via82xx_mixer_new(chip)) < 0)
		goto __error;

	if ((err = snd_via686_pcm_new(chip)) < 0 )
		goto __error;

	/* disable interrupts */
	for (i = 0; i < chip->num_devs; i++)
		snd_via82xx_channel_reset(chip, &chip->devs[i]);

	sprintf(card->longname, "%s at 0x%lx, irq %d",
		card->shortname, chip->port, chip->irq);

	snd_via82xx_proc_init(chip);

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

 __error:
	snd_card_free(card);
	return err;
}

static struct snd_card *snd_bcm2835_card_new(struct device *dev)
{
	struct snd_card *card;
	int ret;

	ret = snd_card_new(dev, -1, NULL, THIS_MODULE, 0, &card);
	if (ret)
		return ERR_PTR(ret);

	return card;
}