C++ snd_card_disconnect函数代码示例

int snd_cs5535audio_resume(struct pci_dev *pci)
{
	struct snd_card *card = pci_get_drvdata(pci);
	struct cs5535audio *cs5535au = card->private_data;
	u32 tmp;
	int timeout;
	int i;

	pci_set_power_state(pci, PCI_D0);
	if (pci_restore_state(pci) < 0) {
		printk(KERN_ERR "cs5535audio: pci_restore_state failed, "
		       "disabling device\n");
		snd_card_disconnect(card);
		return -EIO;
	}
	if (pci_enable_device(pci) < 0) {
		printk(KERN_ERR "cs5535audio: pci_enable_device failed, "
		       "disabling device\n");
		snd_card_disconnect(card);
		return -EIO;
	}
	pci_set_master(pci);

	/* set LNK_WRM_RST to reset AC link */
	cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_WRM_RST);

	timeout = 50;
	do {
		tmp = cs_readl(cs5535au, ACC_CODEC_STATUS);
		if (tmp & PRM_RDY_STS)
			break;
		udelay(1);
	} while (--timeout);

	if (!timeout)
		snd_printk(KERN_ERR "Failure getting AC Link ready\n");

	/* set up rate regs, dma. actual initiation is done in trig */
	for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
		struct cs5535audio_dma *dma = &cs5535au->dmas[i];
		if (dma && dma->substream) {
			dma->substream->ops->prepare(dma->substream);
			dma->ops->setup_prd(cs5535au, dma->saved_prd);
		}
	}

	/* we depend on ac97 to perform the codec power up */
	snd_ac97_resume(cs5535au->ac97);
	snd_power_change_state(card, SNDRV_CTL_POWER_D0);

	return 0;
}

/*
	Line 6 device disconnected.
*/
void line6_disconnect(struct usb_interface *interface)
{
	struct usb_line6 *line6 = usb_get_intfdata(interface);
	struct usb_device *usbdev = interface_to_usbdev(interface);

	if (!line6)
		return;

	if (WARN_ON(usbdev != line6->usbdev))
		return;

	if (line6->urb_listen != NULL)
		line6_stop_listen(line6);

	snd_card_disconnect(line6->card);
	if (line6->line6pcm)
		line6_pcm_disconnect(line6->line6pcm);
	if (line6->disconnect)
		line6->disconnect(line6);

	dev_info(&interface->dev, "Line 6 %s now disconnected\n",
		 line6->properties->name);

	/* make sure the device isn't destructed twice: */
	usb_set_intfdata(interface, NULL);

	snd_card_free_when_closed(line6->card);
}

int oxygen_pci_resume(struct pci_dev *pci)
{
	struct snd_card *card = pci_get_drvdata(pci);
	struct oxygen *chip = card->private_data;
	unsigned int i;

	pci_set_power_state(pci, PCI_D0);
	pci_restore_state(pci);
	if (pci_enable_device(pci) < 0) {
		snd_printk(KERN_ERR "cannot reenable device");
		snd_card_disconnect(card);
		return -EIO;
	}
	pci_set_master(pci);

	oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
	oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
	for (i = 0; i < OXYGEN_IO_SIZE; ++i)
		if (is_bit_set(registers_to_restore, i))
			oxygen_write8(chip, i, chip->saved_registers._8[i]);
	if (chip->has_ac97_0)
		oxygen_restore_ac97(chip, 0);
	if (chip->has_ac97_1)
		oxygen_restore_ac97(chip, 1);

	if (chip->model.resume)
		chip->model.resume(chip);

	oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, chip->interrupt_mask);

	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
}

static void vxpocket_detach(dev_link_t *link)
{
	struct snd_vxpocket *vxp;
	vx_core_t *chip;
	dev_link_t **linkp;

	if (! link)
		return;

	vxp = link->priv;
	chip = (vx_core_t *)vxp;
	card_alloc &= ~(1 << vxp->index);

	/* Remove the interface data from the linked list */
	for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
		if (*linkp == link) {
			*linkp = link->next;
			break;
		}

	chip->chip_status |= VX_STAT_IS_STALE; /* to be sure */
	snd_card_disconnect(chip->card);
	vxpocket_release(link);
	snd_card_free_in_thread(chip->card);
}

static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
{
	struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);

	snd_card_disconnect(card);
	snd_card_free_when_closed(card);
}

static int snd_emu10k1_resume(struct device *dev)
{
	struct pci_dev *pci = to_pci_dev(dev);
	struct snd_card *card = dev_get_drvdata(dev);
	struct snd_emu10k1 *emu = card->private_data;

	pci_set_power_state(pci, PCI_D0);
	pci_restore_state(pci);
	if (pci_enable_device(pci) < 0) {
		printk(KERN_ERR "emu10k1: pci_enable_device failed, "
		       "disabling device\n");
		snd_card_disconnect(card);
		return -EIO;
	}
	pci_set_master(pci);

	snd_emu10k1_resume_init(emu);
	snd_emu10k1_efx_resume(emu);
	snd_ac97_resume(emu->ac97);
	snd_emu10k1_resume_regs(emu);

	if (emu->card_capabilities->ca0151_chip)
		snd_p16v_resume(emu);

	emu->suspend = 0;

	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
}

static void __devexit sscape_pnp_remove(struct pnp_card_link * pcard)
{
	snd_card_t *card = (snd_card_t *) pnp_get_card_drvdata(pcard);
        
	pnp_set_card_drvdata(pcard, NULL);
	snd_card_disconnect(card);
	snd_card_free_in_thread(card);
}

static void efw_remove(struct fw_unit *unit)
{
	struct snd_efw *efw = dev_get_drvdata(&unit->device);

	snd_efw_stream_destroy_duplex(efw);
	snd_efw_transaction_remove_instance(efw);

	snd_card_disconnect(efw->card);
	snd_card_free_when_closed(efw->card);
}

/*
	Cleanup the Line6 USB audio system.
*/
void line6_cleanup_audio(struct usb_line6 *line6)
{
	struct snd_card *card = line6->card;

	if (card == NULL)
		return;

	snd_card_disconnect(card);
	snd_card_free(card);
	line6->card = NULL;
}

/*
 * snd_pdacf_detach - detach callback for cs
 */
static void snd_pdacf_detach(struct pcmcia_device *link)
{
	struct snd_pdacf *chip = link->priv;

	snd_printdd(KERN_DEBUG "pdacf_detach called\n");

	if (chip->chip_status & PDAUDIOCF_STAT_IS_CONFIGURED)
		snd_pdacf_powerdown(chip);
	chip->chip_status |= PDAUDIOCF_STAT_IS_STALE; /* to be sure */
	snd_card_disconnect(chip->card);
	snd_card_free_in_thread(chip->card);
}

static void oxfw_remove(struct fw_unit *unit)
{
	struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);

	snd_card_disconnect(oxfw->card);

	snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
	if (oxfw->has_output)
		snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);

	snd_card_free_when_closed(oxfw->card);
}

/*
 * snd_pdacf_detach - detach callback for cs
 */
static void snd_pdacf_detach(struct pcmcia_device *p_dev)
{
	dev_link_t *link = dev_to_instance(p_dev);
	struct snd_pdacf *chip = link->priv;

	snd_printdd(KERN_DEBUG "pdacf_detach called\n");

	if (chip->chip_status & PDAUDIOCF_STAT_IS_CONFIGURED)
		snd_pdacf_powerdown(chip);
	chip->chip_status |= PDAUDIOCF_STAT_IS_STALE; /* to be sure */
	snd_card_disconnect(chip->card);
	snd_card_free_when_closed(chip->card);
}

static int snd_vx222_resume(struct pci_dev *pci)
{
	struct snd_card *card = pci_get_drvdata(pci);
	struct snd_vx222 *vx = card->private_data;

	pci_set_power_state(pci, PCI_D0);
	pci_restore_state(pci);
	if (pci_enable_device(pci) < 0) {
		printk(KERN_ERR "vx222: pci_enable_device failed, "
		       "disabling device\n");
		snd_card_disconnect(card);
		return -EIO;
	}
	pci_set_master(pci);
	return snd_vx_resume(&vx->core);
}

static void snd_bebob_remove(struct fw_unit *unit)
{
	struct snd_bebob *bebob = dev_get_drvdata(&unit->device);

	/* this is for firmware bootloader */
	if (bebob == NULL)
		goto end;

	snd_bebob_destroy_pcm_devices(bebob);

	snd_card_disconnect(bebob->card);
	snd_card_free_when_closed(bebob->card);

end:
	return;
}

static int __devexit snd_mpu401_acpi_remove(struct acpi_device *device,
					    int type)
{
	snd_card_t *card;

	if (!device)
		return -EINVAL;
	card = (snd_card_t *)acpi_driver_data(device);
	if (!card)
		return -EINVAL;

	snd_card_disconnect(card);
	snd_card_free_in_thread(card);
	acpi_driver_data(device) = NULL;
	return 0;
}