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193e813814
linux/sound/pci/oxygen/oxygen_lib.c
Clemens Ladisch 193e813814 [ALSA] oxygen: generalize handling of DAC volume limits 
Add fields for the DAC volume limits to the module structure so that
model drivers do not need to install their own control info handlers.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-04-24 12:00:36 +02:00

538 lines
17 KiB
C
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/*
* C-Media CMI8788 driver - main driver module
*
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
*
*
* This driver is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2.
*
* This driver 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 driver; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <sound/ac97_codec.h>
#include <sound/asoundef.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/mpu401.h>
#include <sound/pcm.h>
#include "oxygen.h"
#include "cm9780.h"
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_DESCRIPTION("C-Media CMI8788 helper library");
MODULE_LICENSE("GPL");
static irqreturn_t oxygen_interrupt(int dummy, void *dev_id)
{
struct oxygen *chip = dev_id;
unsigned int status, clear, elapsed_streams, i;
status = oxygen_read16(chip, OXYGEN_INTERRUPT_STATUS);
if (!status)
return IRQ_NONE;
spin_lock(&chip->reg_lock);
clear = status & (OXYGEN_CHANNEL_A |
OXYGEN_CHANNEL_B |
OXYGEN_CHANNEL_C |
OXYGEN_CHANNEL_SPDIF |
OXYGEN_CHANNEL_MULTICH |
OXYGEN_CHANNEL_AC97 |
OXYGEN_INT_SPDIF_IN_DETECT |
OXYGEN_INT_GPIO |
OXYGEN_INT_AC97);
if (clear) {
if (clear & OXYGEN_INT_SPDIF_IN_DETECT)
chip->interrupt_mask &= ~OXYGEN_INT_SPDIF_IN_DETECT;
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK,
chip->interrupt_mask & ~clear);
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK,
chip->interrupt_mask);
}
elapsed_streams = status & chip->pcm_running;
spin_unlock(&chip->reg_lock);
for (i = 0; i < PCM_COUNT; ++i)
if ((elapsed_streams & (1 << i)) && chip->streams[i])
snd_pcm_period_elapsed(chip->streams[i]);
if (status & OXYGEN_INT_SPDIF_IN_DETECT) {
spin_lock(&chip->reg_lock);
i = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
if (i & (OXYGEN_SPDIF_SENSE_INT | OXYGEN_SPDIF_LOCK_INT |
OXYGEN_SPDIF_RATE_INT)) {
/* write the interrupt bit(s) to clear */
oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, i);
schedule_work(&chip->spdif_input_bits_work);
}
spin_unlock(&chip->reg_lock);
}
if (status & OXYGEN_INT_GPIO)
schedule_work(&chip->gpio_work);
if ((status & OXYGEN_INT_MIDI) && chip->midi)
snd_mpu401_uart_interrupt(0, chip->midi->private_data);
if (status & OXYGEN_INT_AC97)
wake_up(&chip->ac97_waitqueue);
return IRQ_HANDLED;
}
static void oxygen_spdif_input_bits_changed(struct work_struct *work)
{
struct oxygen *chip = container_of(work, struct oxygen,
spdif_input_bits_work);
u32 reg;
/*
* This function gets called when there is new activity on the SPDIF
* input, or when we lose lock on the input signal, or when the rate
* changes.
*/
msleep(1);
spin_lock_irq(&chip->reg_lock);
reg = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
if ((reg & (OXYGEN_SPDIF_SENSE_STATUS |
OXYGEN_SPDIF_LOCK_STATUS))
== OXYGEN_SPDIF_SENSE_STATUS) {
/*
* If we detect activity on the SPDIF input but cannot lock to
* a signal, the clock bit is likely to be wrong.
*/
reg ^= OXYGEN_SPDIF_IN_CLOCK_MASK;
oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, reg);
spin_unlock_irq(&chip->reg_lock);
msleep(1);
spin_lock_irq(&chip->reg_lock);
reg = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
if ((reg & (OXYGEN_SPDIF_SENSE_STATUS |
OXYGEN_SPDIF_LOCK_STATUS))
== OXYGEN_SPDIF_SENSE_STATUS) {
/* nothing detected with either clock; give up */
if ((reg & OXYGEN_SPDIF_IN_CLOCK_MASK)
== OXYGEN_SPDIF_IN_CLOCK_192) {
/*
* Reset clock to <= 96 kHz because this is
* more likely to be received next time.
*/
reg &= ~OXYGEN_SPDIF_IN_CLOCK_MASK;
reg |= OXYGEN_SPDIF_IN_CLOCK_96;
oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, reg);
}
}
}
spin_unlock_irq(&chip->reg_lock);
if (chip->controls[CONTROL_SPDIF_INPUT_BITS]) {
spin_lock_irq(&chip->reg_lock);
chip->interrupt_mask |= OXYGEN_INT_SPDIF_IN_DETECT;
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK,
chip->interrupt_mask);
spin_unlock_irq(&chip->reg_lock);
/*
* We don't actually know that any channel status bits have
* changed, but let's send a notification just to be sure.
*/
snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
&chip->controls[CONTROL_SPDIF_INPUT_BITS]->id);
}
}
static void oxygen_gpio_changed(struct work_struct *work)
{
struct oxygen *chip = container_of(work, struct oxygen, gpio_work);
if (chip->model->gpio_changed)
chip->model->gpio_changed(chip);
}
#ifdef CONFIG_PROC_FS
static void oxygen_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct oxygen *chip = entry->private_data;
int i, j;
snd_iprintf(buffer, "CMI8788\n\n");
for (i = 0; i < 0x100; i += 0x10) {
snd_iprintf(buffer, "%02x:", i);
for (j = 0; j < 0x10; ++j)
snd_iprintf(buffer, " %02x", oxygen_read8(chip, i + j));
snd_iprintf(buffer, "\n");
}
if (mutex_lock_interruptible(&chip->mutex) < 0)
return;
if (chip->has_ac97_0) {
snd_iprintf(buffer, "\nAC97\n");
for (i = 0; i < 0x80; i += 0x10) {
snd_iprintf(buffer, "%02x:", i);
for (j = 0; j < 0x10; j += 2)
snd_iprintf(buffer, " %04x",
oxygen_read_ac97(chip, 0, i + j));
snd_iprintf(buffer, "\n");
}
}
if (chip->has_ac97_1) {
snd_iprintf(buffer, "\nAC97 2\n");
for (i = 0; i < 0x80; i += 0x10) {
snd_iprintf(buffer, "%02x:", i);
for (j = 0; j < 0x10; j += 2)
snd_iprintf(buffer, " %04x",
oxygen_read_ac97(chip, 1, i + j));
snd_iprintf(buffer, "\n");
}
}
mutex_unlock(&chip->mutex);
}
static void oxygen_proc_init(struct oxygen *chip)
{
struct snd_info_entry *entry;
if (!snd_card_proc_new(chip->card, "cmi8788", &entry))
snd_info_set_text_ops(entry, chip, oxygen_proc_read);
}
#else
#define oxygen_proc_init(chip)
#endif
static void oxygen_init(struct oxygen *chip)
{
unsigned int i;
chip->dac_routing = 1;
for (i = 0; i < 8; ++i)
chip->dac_volume[i] = chip->model->dac_volume_max;
chip->spdif_playback_enable = 1;
chip->spdif_bits = OXYGEN_SPDIF_C | OXYGEN_SPDIF_ORIGINAL |
(IEC958_AES1_CON_PCM_CODER << OXYGEN_SPDIF_CATEGORY_SHIFT);
chip->spdif_pcm_bits = chip->spdif_bits;
if (oxygen_read8(chip, OXYGEN_REVISION) & OXYGEN_REVISION_2)
chip->revision = 2;
else
chip->revision = 1;
if (chip->revision == 1)
oxygen_set_bits8(chip, OXYGEN_MISC,
OXYGEN_MISC_PCI_MEM_W_1_CLOCK);
i = oxygen_read16(chip, OXYGEN_AC97_CONTROL);
chip->has_ac97_0 = (i & OXYGEN_AC97_CODEC_0) != 0;
chip->has_ac97_1 = (i & OXYGEN_AC97_CODEC_1) != 0;
oxygen_write8_masked(chip, OXYGEN_FUNCTION,
OXYGEN_FUNCTION_RESET_CODEC |
chip->model->function_flags,
OXYGEN_FUNCTION_RESET_CODEC |
OXYGEN_FUNCTION_2WIRE_SPI_MASK |
OXYGEN_FUNCTION_ENABLE_SPI_4_5);
oxygen_write8(chip, OXYGEN_DMA_STATUS, 0);
oxygen_write8(chip, OXYGEN_DMA_PAUSE, 0);
oxygen_write8(chip, OXYGEN_PLAY_CHANNELS,
OXYGEN_PLAY_CHANNELS_2 |
OXYGEN_DMA_A_BURST_8 |
OXYGEN_DMA_MULTICH_BURST_8);
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
oxygen_write8_masked(chip, OXYGEN_MISC,
chip->model->misc_flags,
OXYGEN_MISC_WRITE_PCI_SUBID |
OXYGEN_MISC_REC_C_FROM_SPDIF |
OXYGEN_MISC_REC_B_FROM_AC97 |
OXYGEN_MISC_REC_A_FROM_MULTICH |
OXYGEN_MISC_MIDI);
oxygen_write8(chip, OXYGEN_REC_FORMAT,
(OXYGEN_FORMAT_16 << OXYGEN_REC_FORMAT_A_SHIFT) |
(OXYGEN_FORMAT_16 << OXYGEN_REC_FORMAT_B_SHIFT) |
(OXYGEN_FORMAT_16 << OXYGEN_REC_FORMAT_C_SHIFT));
oxygen_write8(chip, OXYGEN_PLAY_FORMAT,
(OXYGEN_FORMAT_16 << OXYGEN_SPDIF_FORMAT_SHIFT) |
(OXYGEN_FORMAT_16 << OXYGEN_MULTICH_FORMAT_SHIFT));
oxygen_write8(chip, OXYGEN_REC_CHANNELS, OXYGEN_REC_CHANNELS_2_2_2);
oxygen_write16(chip, OXYGEN_I2S_MULTICH_FORMAT,
OXYGEN_RATE_48000 | chip->model->dac_i2s_format |
OXYGEN_I2S_MCLK_256 | OXYGEN_I2S_BITS_16 |
OXYGEN_I2S_MASTER | OXYGEN_I2S_BCLK_64);
if (chip->model->pcm_dev_cfg & CAPTURE_0_FROM_I2S_1)
oxygen_write16(chip, OXYGEN_I2S_A_FORMAT,
OXYGEN_RATE_48000 | chip->model->adc_i2s_format |
OXYGEN_I2S_MCLK_256 | OXYGEN_I2S_BITS_16 |
OXYGEN_I2S_MASTER | OXYGEN_I2S_BCLK_64);
else
oxygen_write16(chip, OXYGEN_I2S_A_FORMAT,
OXYGEN_I2S_MASTER | OXYGEN_I2S_MUTE_MCLK);
if (chip->model->pcm_dev_cfg & (CAPTURE_0_FROM_I2S_2 |
CAPTURE_2_FROM_I2S_2))
oxygen_write16(chip, OXYGEN_I2S_B_FORMAT,
OXYGEN_RATE_48000 | chip->model->adc_i2s_format |
OXYGEN_I2S_MCLK_256 | OXYGEN_I2S_BITS_16 |
OXYGEN_I2S_MASTER | OXYGEN_I2S_BCLK_64);
else
oxygen_write16(chip, OXYGEN_I2S_B_FORMAT,
OXYGEN_I2S_MASTER | OXYGEN_I2S_MUTE_MCLK);
oxygen_write16(chip, OXYGEN_I2S_C_FORMAT,
OXYGEN_I2S_MASTER | OXYGEN_I2S_MUTE_MCLK);
oxygen_clear_bits32(chip, OXYGEN_SPDIF_CONTROL,
OXYGEN_SPDIF_OUT_ENABLE |
OXYGEN_SPDIF_LOOPBACK);
if (chip->model->pcm_dev_cfg & CAPTURE_1_FROM_SPDIF)
oxygen_write32_masked(chip, OXYGEN_SPDIF_CONTROL,
OXYGEN_SPDIF_SENSE_MASK |
OXYGEN_SPDIF_LOCK_MASK |
OXYGEN_SPDIF_RATE_MASK |
OXYGEN_SPDIF_LOCK_PAR |
OXYGEN_SPDIF_IN_CLOCK_96,
OXYGEN_SPDIF_SENSE_MASK |
OXYGEN_SPDIF_LOCK_MASK |
OXYGEN_SPDIF_RATE_MASK |
OXYGEN_SPDIF_SENSE_PAR |
OXYGEN_SPDIF_LOCK_PAR |
OXYGEN_SPDIF_IN_CLOCK_MASK);
else
oxygen_clear_bits32(chip, OXYGEN_SPDIF_CONTROL,
OXYGEN_SPDIF_SENSE_MASK |
OXYGEN_SPDIF_LOCK_MASK |
OXYGEN_SPDIF_RATE_MASK);
oxygen_write32(chip, OXYGEN_SPDIF_OUTPUT_BITS, chip->spdif_bits);
oxygen_clear_bits8(chip, OXYGEN_MPU401_CONTROL, OXYGEN_MPU401_LOOPBACK);
oxygen_write8(chip, OXYGEN_GPI_INTERRUPT_MASK, 0);
oxygen_write16(chip, OXYGEN_GPIO_INTERRUPT_MASK, 0);
oxygen_write16(chip, OXYGEN_PLAY_ROUTING,
OXYGEN_PLAY_MULTICH_I2S_DAC |
OXYGEN_PLAY_SPDIF_SPDIF |
(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
(1 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
(3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT));
oxygen_write8(chip, OXYGEN_REC_ROUTING,
OXYGEN_REC_A_ROUTE_I2S_ADC_1 |
OXYGEN_REC_B_ROUTE_I2S_ADC_2 |
OXYGEN_REC_C_ROUTE_SPDIF);
oxygen_write8(chip, OXYGEN_ADC_MONITOR, 0);
oxygen_write8(chip, OXYGEN_A_MONITOR_ROUTING,
(0 << OXYGEN_A_MONITOR_ROUTE_0_SHIFT) |
(1 << OXYGEN_A_MONITOR_ROUTE_1_SHIFT) |
(2 << OXYGEN_A_MONITOR_ROUTE_2_SHIFT) |
(3 << OXYGEN_A_MONITOR_ROUTE_3_SHIFT));
if (chip->has_ac97_0 | chip->has_ac97_1)
oxygen_write8(chip, OXYGEN_AC97_INTERRUPT_MASK,
OXYGEN_AC97_INT_READ_DONE |
OXYGEN_AC97_INT_WRITE_DONE);
else
oxygen_write8(chip, OXYGEN_AC97_INTERRUPT_MASK, 0);
oxygen_write32(chip, OXYGEN_AC97_OUT_CONFIG, 0);
oxygen_write32(chip, OXYGEN_AC97_IN_CONFIG, 0);
if (!(chip->has_ac97_0 | chip->has_ac97_1))
oxygen_set_bits16(chip, OXYGEN_AC97_CONTROL,
OXYGEN_AC97_CLOCK_DISABLE);
if (!chip->has_ac97_0) {
oxygen_set_bits16(chip, OXYGEN_AC97_CONTROL,
OXYGEN_AC97_NO_CODEC_0);
} else {
oxygen_write_ac97(chip, 0, AC97_RESET, 0);
msleep(1);
oxygen_ac97_set_bits(chip, 0, CM9780_GPIO_SETUP,
CM9780_GPIO0IO | CM9780_GPIO1IO);
oxygen_ac97_set_bits(chip, 0, CM9780_MIXER,
CM9780_BSTSEL | CM9780_STRO_MIC |
CM9780_MIX2FR | CM9780_PCBSW);
oxygen_ac97_set_bits(chip, 0, CM9780_JACK,
CM9780_RSOE | CM9780_CBOE |
CM9780_SSOE | CM9780_FROE |
CM9780_MIC2MIC | CM9780_LI2LI);
oxygen_write_ac97(chip, 0, AC97_MASTER, 0x0000);
oxygen_write_ac97(chip, 0, AC97_PC_BEEP, 0x8000);
oxygen_write_ac97(chip, 0, AC97_MIC, 0x8808);
oxygen_write_ac97(chip, 0, AC97_LINE, 0x0808);
oxygen_write_ac97(chip, 0, AC97_CD, 0x8808);
oxygen_write_ac97(chip, 0, AC97_VIDEO, 0x8808);
oxygen_write_ac97(chip, 0, AC97_AUX, 0x8808);
oxygen_write_ac97(chip, 0, AC97_REC_GAIN, 0x8000);
oxygen_write_ac97(chip, 0, AC97_CENTER_LFE_MASTER, 0x8080);
oxygen_write_ac97(chip, 0, AC97_SURROUND_MASTER, 0x8080);
oxygen_ac97_clear_bits(chip, 0, CM9780_GPIO_STATUS,
CM9780_GPO0);
/* power down unused ADCs and DACs */
oxygen_ac97_set_bits(chip, 0, AC97_POWERDOWN,
AC97_PD_PR0 | AC97_PD_PR1);
oxygen_ac97_set_bits(chip, 0, AC97_EXTENDED_STATUS,
AC97_EA_PRI | AC97_EA_PRJ | AC97_EA_PRK);
}
if (chip->has_ac97_1) {
oxygen_set_bits32(chip, OXYGEN_AC97_OUT_CONFIG,
OXYGEN_AC97_CODEC1_SLOT3 |
OXYGEN_AC97_CODEC1_SLOT4);
oxygen_write_ac97(chip, 1, AC97_RESET, 0);
msleep(1);
oxygen_write_ac97(chip, 1, AC97_MASTER, 0x0000);
oxygen_write_ac97(chip, 1, AC97_HEADPHONE, 0x8000);
oxygen_write_ac97(chip, 1, AC97_PC_BEEP, 0x8000);
oxygen_write_ac97(chip, 1, AC97_MIC, 0x8808);
oxygen_write_ac97(chip, 1, AC97_LINE, 0x8808);
oxygen_write_ac97(chip, 1, AC97_CD, 0x8808);
oxygen_write_ac97(chip, 1, AC97_VIDEO, 0x8808);
oxygen_write_ac97(chip, 1, AC97_AUX, 0x8808);
oxygen_write_ac97(chip, 1, AC97_PCM, 0x0808);
oxygen_write_ac97(chip, 1, AC97_REC_SEL, 0x0000);
oxygen_write_ac97(chip, 1, AC97_REC_GAIN, 0x0000);
oxygen_ac97_set_bits(chip, 1, 0x6a, 0x0040);
}
}
static void oxygen_card_free(struct snd_card *card)
{
struct oxygen *chip = card->private_data;
spin_lock_irq(&chip->reg_lock);
chip->interrupt_mask = 0;
chip->pcm_running = 0;
oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
spin_unlock_irq(&chip->reg_lock);
if (chip->irq >= 0) {
free_irq(chip->irq, chip);
synchronize_irq(chip->irq);
}
flush_scheduled_work();
chip->model->cleanup(chip);
mutex_destroy(&chip->mutex);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
}
int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
const struct oxygen_model *model)
{
struct snd_card *card;
struct oxygen *chip;
int err;
card = snd_card_new(index, id, model->owner,
sizeof *chip + model->model_data_size);
if (!card)
return -ENOMEM;
chip = card->private_data;
chip->card = card;
chip->pci = pci;
chip->irq = -1;
chip->model = model;
chip->model_data = chip + 1;
spin_lock_init(&chip->reg_lock);
mutex_init(&chip->mutex);
INIT_WORK(&chip->spdif_input_bits_work,
oxygen_spdif_input_bits_changed);
INIT_WORK(&chip->gpio_work, oxygen_gpio_changed);
init_waitqueue_head(&chip->ac97_waitqueue);
err = pci_enable_device(pci);
if (err < 0)
goto err_card;
err = pci_request_regions(pci, model->chip);
if (err < 0) {
snd_printk(KERN_ERR "cannot reserve PCI resources\n");
goto err_pci_enable;
}
if (!(pci_resource_flags(pci, 0) & IORESOURCE_IO) ||
pci_resource_len(pci, 0) < 0x100) {
snd_printk(KERN_ERR "invalid PCI I/O range\n");
err = -ENXIO;
goto err_pci_regions;
}
chip->addr = pci_resource_start(pci, 0);
pci_set_master(pci);
snd_card_set_dev(card, &pci->dev);
card->private_free = oxygen_card_free;
oxygen_init(chip);
model->init(chip);
err = request_irq(pci->irq, oxygen_interrupt, IRQF_SHARED,
model->chip, chip);
if (err < 0) {
snd_printk(KERN_ERR "cannot grab interrupt %d\n", pci->irq);
goto err_card;
}
chip->irq = pci->irq;
strcpy(card->driver, model->chip);
strcpy(card->shortname, model->shortname);
sprintf(card->longname, "%s (rev %u) at %#lx, irq %i",
model->longname, chip->revision, chip->addr, chip->irq);
strcpy(card->mixername, model->chip);
snd_component_add(card, model->chip);
err = oxygen_pcm_init(chip);
if (err < 0)
goto err_card;
err = oxygen_mixer_init(chip);
if (err < 0)
goto err_card;
if (model->misc_flags & OXYGEN_MISC_MIDI) {
err = snd_mpu401_uart_new(card, 0, MPU401_HW_CMIPCI,
chip->addr + OXYGEN_MPU401,
MPU401_INFO_INTEGRATED, 0, 0,
&chip->midi);
if (err < 0)
goto err_card;
}
oxygen_proc_init(chip);
spin_lock_irq(&chip->reg_lock);
if (chip->model->pcm_dev_cfg & CAPTURE_1_FROM_SPDIF)
chip->interrupt_mask |= OXYGEN_INT_SPDIF_IN_DETECT;
if (chip->has_ac97_0 | chip->has_ac97_1)
chip->interrupt_mask |= OXYGEN_INT_AC97;
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, chip->interrupt_mask);
spin_unlock_irq(&chip->reg_lock);
err = snd_card_register(card);
if (err < 0)
goto err_card;
pci_set_drvdata(pci, card);
return 0;
err_pci_regions:
pci_release_regions(pci);
err_pci_enable:
pci_disable_device(pci);
err_card:
snd_card_free(card);
return err;
}
EXPORT_SYMBOL(oxygen_pci_probe);
void oxygen_pci_remove(struct pci_dev *pci)
{
snd_card_free(pci_get_drvdata(pci));
pci_set_drvdata(pci, NULL);
}
EXPORT_SYMBOL(oxygen_pci_remove);
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