ALSA: AC97: add AC97 support for AT91.
This patch add AC97 support for ATMEL AT91, using the AVR32 code.
While AVR is using a DMA, the AT91 chips are using a Peripheral Data
Controller.
Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c
index 0c0f877..3c0a6f4 100644
--- a/sound/atmel/ac97c.c
+++ b/sound/atmel/ac97c.c
@@ -13,6 +13,7 @@
#include <linux/device.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
+#include <linux/atmel_pdc.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
@@ -31,6 +32,10 @@
#include <linux/dw_dmac.h>
+#include <mach/cpu.h>
+#include <mach/hardware.h>
+#include <mach/gpio.h>
+
#include "ac97c.h"
enum {
@@ -63,6 +68,7 @@
u64 cur_format;
unsigned int cur_rate;
unsigned long flags;
+ int playback_period, capture_period;
/* Serialize access to opened variable */
spinlock_t lock;
void __iomem *regs;
@@ -242,10 +248,12 @@
if (retval < 0)
return retval;
/* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (retval == 1)
- if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.tx_chan);
-
+ if (cpu_is_at32ap7000()) {
+ /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
+ if (retval == 1)
+ if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_free(chip->dma.tx_chan);
+ }
/* Set restrictions to params. */
mutex_lock(&opened_mutex);
chip->cur_rate = params_rate(hw_params);
@@ -266,9 +274,14 @@
if (retval < 0)
return retval;
/* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (retval == 1)
- if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.rx_chan);
+ if (cpu_is_at32ap7000()) {
+ if (retval < 0)
+ return retval;
+ /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
+ if (retval == 1)
+ if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
+ dw_dma_cyclic_free(chip->dma.rx_chan);
+ }
/* Set restrictions to params. */
mutex_lock(&opened_mutex);
@@ -282,16 +295,20 @@
static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000()) {
+ if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_free(chip->dma.tx_chan);
+ }
return snd_pcm_lib_free_pages(substream);
}
static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.rx_chan);
+ if (cpu_is_at32ap7000()) {
+ if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
+ dw_dma_cyclic_free(chip->dma.rx_chan);
+ }
return snd_pcm_lib_free_pages(substream);
}
@@ -299,9 +316,11 @@
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
unsigned long word = ac97c_readl(chip, OCA);
int retval;
+ chip->playback_period = 0;
word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
/* assign channels to AC97C channel A */
@@ -324,7 +343,8 @@
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
- word |= AC97C_CMR_CEM_LITTLE;
+ if (cpu_is_at32ap7000())
+ word |= AC97C_CMR_CEM_LITTLE;
break;
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
word &= ~(AC97C_CMR_CEM_LITTLE);
@@ -363,9 +383,18 @@
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
runtime->rate);
- if (!test_bit(DMA_TX_READY, &chip->flags))
- retval = atmel_ac97c_prepare_dma(chip, substream,
- DMA_TO_DEVICE);
+ if (cpu_is_at32ap7000()) {
+ if (!test_bit(DMA_TX_READY, &chip->flags))
+ retval = atmel_ac97c_prepare_dma(chip, substream,
+ DMA_TO_DEVICE);
+ } else {
+ /* Initialize and start the PDC */
+ writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_TCR);
+ writel(runtime->dma_addr + block_size,
+ chip->regs + ATMEL_PDC_TNPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);
+ }
return retval;
}
@@ -374,9 +403,11 @@
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
unsigned long word = ac97c_readl(chip, ICA);
int retval;
+ chip->capture_period = 0;
word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
/* assign channels to AC97C channel A */
@@ -399,7 +430,8 @@
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
- word |= AC97C_CMR_CEM_LITTLE;
+ if (cpu_is_at32ap7000())
+ word |= AC97C_CMR_CEM_LITTLE;
break;
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
word &= ~(AC97C_CMR_CEM_LITTLE);
@@ -438,9 +470,18 @@
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
runtime->rate);
- if (!test_bit(DMA_RX_READY, &chip->flags))
- retval = atmel_ac97c_prepare_dma(chip, substream,
- DMA_FROM_DEVICE);
+ if (cpu_is_at32ap7000()) {
+ if (!test_bit(DMA_RX_READY, &chip->flags))
+ retval = atmel_ac97c_prepare_dma(chip, substream,
+ DMA_FROM_DEVICE);
+ } else {
+ /* Initialize and start the PDC */
+ writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_RCR);
+ writel(runtime->dma_addr + block_size,
+ chip->regs + ATMEL_PDC_RNPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);
+ }
return retval;
}
@@ -449,7 +490,7 @@
atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- unsigned long camr;
+ unsigned long camr, ptcr = 0;
int retval = 0;
camr = ac97c_readl(chip, CAMR);
@@ -458,15 +499,22 @@
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
case SNDRV_PCM_TRIGGER_START:
- retval = dw_dma_cyclic_start(chip->dma.tx_chan);
- if (retval)
- goto out;
+ if (cpu_is_at32ap7000()) {
+ retval = dw_dma_cyclic_start(chip->dma.tx_chan);
+ if (retval)
+ goto out;
+ } else {
+ ptcr = ATMEL_PDC_TXTEN;
+ }
camr |= AC97C_CMR_CENA;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
case SNDRV_PCM_TRIGGER_STOP:
- dw_dma_cyclic_stop(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000())
+ dw_dma_cyclic_stop(chip->dma.tx_chan);
+ else
+ ptcr |= ATMEL_PDC_TXTDIS;
if (chip->opened <= 1)
camr &= ~AC97C_CMR_CENA;
break;
@@ -476,6 +524,8 @@
}
ac97c_writel(chip, CAMR, camr);
+ if (!cpu_is_at32ap7000())
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
out:
return retval;
}
@@ -484,24 +534,32 @@
atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- unsigned long camr;
+ unsigned long camr, ptcr = 0;
int retval = 0;
camr = ac97c_readl(chip, CAMR);
+ ptcr = readl(chip->regs + ATMEL_PDC_PTSR);
switch (cmd) {
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
case SNDRV_PCM_TRIGGER_START:
- retval = dw_dma_cyclic_start(chip->dma.rx_chan);
- if (retval)
- goto out;
+ if (cpu_is_at32ap7000()) {
+ retval = dw_dma_cyclic_start(chip->dma.rx_chan);
+ if (retval)
+ goto out;
+ } else {
+ ptcr = ATMEL_PDC_RXTEN;
+ }
camr |= AC97C_CMR_CENA;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
case SNDRV_PCM_TRIGGER_STOP:
- dw_dma_cyclic_stop(chip->dma.rx_chan);
+ if (cpu_is_at32ap7000())
+ dw_dma_cyclic_stop(chip->dma.rx_chan);
+ else
+ ptcr |= (ATMEL_PDC_RXTDIS);
if (chip->opened <= 1)
camr &= ~AC97C_CMR_CENA;
break;
@@ -511,6 +569,8 @@
}
ac97c_writel(chip, CAMR, camr);
+ if (!cpu_is_at32ap7000())
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
out:
return retval;
}
@@ -523,7 +583,10 @@
snd_pcm_uframes_t frames;
unsigned long bytes;
- bytes = dw_dma_get_src_addr(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000())
+ bytes = dw_dma_get_src_addr(chip->dma.tx_chan);
+ else
+ bytes = readl(chip->regs + ATMEL_PDC_TPR);
bytes -= runtime->dma_addr;
frames = bytes_to_frames(runtime, bytes);
@@ -540,7 +603,10 @@
snd_pcm_uframes_t frames;
unsigned long bytes;
- bytes = dw_dma_get_dst_addr(chip->dma.rx_chan);
+ if (cpu_is_at32ap7000())
+ bytes = dw_dma_get_dst_addr(chip->dma.rx_chan);
+ else
+ bytes = readl(chip->regs + ATMEL_PDC_RPR);
bytes -= runtime->dma_addr;
frames = bytes_to_frames(runtime, bytes);
@@ -578,8 +644,11 @@
u32 sr = ac97c_readl(chip, SR);
u32 casr = ac97c_readl(chip, CASR);
u32 cosr = ac97c_readl(chip, COSR);
+ u32 camr = ac97c_readl(chip, CAMR);
if (sr & AC97C_SR_CAEVT) {
+ struct snd_pcm_runtime *runtime;
+ int offset, next_period, block_size;
dev_info(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n",
casr & AC97C_CSR_OVRUN ? " OVRUN" : "",
casr & AC97C_CSR_RXRDY ? " RXRDY" : "",
@@ -587,6 +656,50 @@
casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "",
casr & AC97C_CSR_TXRDY ? " TXRDY" : "",
!casr ? " NONE" : "");
+ if (!cpu_is_at32ap7000()) {
+ if ((casr & camr) & AC97C_CSR_ENDTX) {
+ runtime = chip->playback_substream->runtime;
+ block_size = frames_to_bytes(runtime,
+ runtime->period_size);
+ chip->playback_period++;
+
+ if (chip->playback_period == runtime->periods)
+ chip->playback_period = 0;
+ next_period = chip->playback_period + 1;
+ if (next_period == runtime->periods)
+ next_period = 0;
+
+ offset = block_size * next_period;
+
+ writel(runtime->dma_addr + offset,
+ chip->regs + ATMEL_PDC_TNPR);
+ writel(block_size / 2,
+ chip->regs + ATMEL_PDC_TNCR);
+
+ snd_pcm_period_elapsed(
+ chip->playback_substream);
+ }
+ if ((casr & camr) & AC97C_CSR_ENDRX) {
+ runtime = chip->capture_substream->runtime;
+ block_size = frames_to_bytes(runtime,
+ runtime->period_size);
+ chip->capture_period++;
+
+ if (chip->capture_period == runtime->periods)
+ chip->capture_period = 0;
+ next_period = chip->capture_period + 1;
+ if (next_period == runtime->periods)
+ next_period = 0;
+
+ offset = block_size * next_period;
+
+ writel(runtime->dma_addr + offset,
+ chip->regs + ATMEL_PDC_RNPR);
+ writel(block_size / 2,
+ chip->regs + ATMEL_PDC_RNCR);
+ snd_pcm_period_elapsed(chip->capture_substream);
+ }
+ }
retval = IRQ_HANDLED;
}
@@ -608,15 +721,50 @@
return retval;
}
+static struct ac97_pcm at91_ac97_pcm_defs[] __devinitdata = {
+ /* Playback */
+ {
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)),
+ } },
+ },
+ /* PCM in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)),
+ } }
+ },
+ /* Mic in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = (1<<AC97_SLOT_MIC),
+ } }
+ },
+};
+
static int __devinit atmel_ac97c_pcm_new(struct atmel_ac97c *chip)
{
struct snd_pcm *pcm;
struct snd_pcm_hardware hw = atmel_ac97c_hw;
- int capture, playback, retval;
+ int capture, playback, retval, err;
capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ if (!cpu_is_at32ap7000()) {
+ err = snd_ac97_pcm_assign(chip->ac97_bus,
+ ARRAY_SIZE(at91_ac97_pcm_defs),
+ at91_ac97_pcm_defs);
+ if (err)
+ return err;
+ }
retval = snd_pcm_new(chip->card, chip->card->shortname,
chip->pdev->id, playback, capture, &pcm);
if (retval)
@@ -775,7 +923,12 @@
return -ENXIO;
}
- pclk = clk_get(&pdev->dev, "pclk");
+ if (cpu_is_at32ap7000()) {
+ pclk = clk_get(&pdev->dev, "pclk");
+ } else {
+ pclk = clk_get(&pdev->dev, "ac97_clk");
+ }
+
if (IS_ERR(pclk)) {
dev_dbg(&pdev->dev, "no peripheral clock\n");
return PTR_ERR(pclk);
@@ -844,43 +997,52 @@
goto err_ac97_bus;
}
- if (pdata->rx_dws.dma_dev) {
- struct dw_dma_slave *dws = &pdata->rx_dws;
- dma_cap_mask_t mask;
+ if (cpu_is_at32ap7000()) {
+ if (pdata->rx_dws.dma_dev) {
+ struct dw_dma_slave *dws = &pdata->rx_dws;
+ dma_cap_mask_t mask;
- dws->rx_reg = regs->start + AC97C_CARHR + 2;
+ dws->rx_reg = regs->start + AC97C_CARHR + 2;
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
- chip->dma.rx_chan = dma_request_channel(mask, filter, dws);
+ chip->dma.rx_chan = dma_request_channel(mask, filter,
+ dws);
- dev_info(&chip->pdev->dev, "using %s for DMA RX\n",
+ dev_info(&chip->pdev->dev, "using %s for DMA RX\n",
dev_name(&chip->dma.rx_chan->dev->device));
- set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- }
+ set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
+ }
- if (pdata->tx_dws.dma_dev) {
- struct dw_dma_slave *dws = &pdata->tx_dws;
- dma_cap_mask_t mask;
+ if (pdata->tx_dws.dma_dev) {
+ struct dw_dma_slave *dws = &pdata->tx_dws;
+ dma_cap_mask_t mask;
- dws->tx_reg = regs->start + AC97C_CATHR + 2;
+ dws->tx_reg = regs->start + AC97C_CATHR + 2;
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
- chip->dma.tx_chan = dma_request_channel(mask, filter, dws);
+ chip->dma.tx_chan = dma_request_channel(mask, filter,
+ dws);
- dev_info(&chip->pdev->dev, "using %s for DMA TX\n",
+ dev_info(&chip->pdev->dev, "using %s for DMA TX\n",
dev_name(&chip->dma.tx_chan->dev->device));
- set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- }
+ set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ }
- if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) &&
- !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) {
- dev_dbg(&pdev->dev, "DMA not available\n");
- retval = -ENODEV;
- goto err_dma;
+ if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) &&
+ !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) {
+ dev_dbg(&pdev->dev, "DMA not available\n");
+ retval = -ENODEV;
+ goto err_dma;
+ }
+ } else {
+ /* Just pretend that we have DMA channel(for at91 i is actually
+ * the PDC) */
+ set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
+ set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
}
retval = atmel_ac97c_pcm_new(chip);
@@ -897,20 +1059,22 @@
platform_set_drvdata(pdev, card);
- dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p\n",
- chip->regs);
+ dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n",
+ chip->regs, irq);
return 0;
err_dma:
- if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.rx_chan);
- if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.tx_chan);
- clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- chip->dma.rx_chan = NULL;
- chip->dma.tx_chan = NULL;
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.tx_chan);
+ clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
+ clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ chip->dma.rx_chan = NULL;
+ chip->dma.tx_chan = NULL;
+ }
err_ac97_bus:
snd_card_set_dev(card, NULL);
@@ -934,10 +1098,12 @@
struct snd_card *card = platform_get_drvdata(pdev);
struct atmel_ac97c *chip = card->private_data;
- if (test_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_stop(chip->dma.rx_chan);
- if (test_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_stop(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_READY, &chip->flags))
+ dw_dma_cyclic_stop(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_stop(chip->dma.tx_chan);
+ }
clk_disable(chip->pclk);
return 0;
@@ -949,11 +1115,12 @@
struct atmel_ac97c *chip = card->private_data;
clk_enable(chip->pclk);
- if (test_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_start(chip->dma.rx_chan);
- if (test_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_start(chip->dma.tx_chan);
-
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_READY, &chip->flags))
+ dw_dma_cyclic_start(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_start(chip->dma.tx_chan);
+ }
return 0;
}
#else
@@ -978,14 +1145,16 @@
iounmap(chip->regs);
free_irq(chip->irq, chip);
- if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.rx_chan);
- if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.tx_chan);
- clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- chip->dma.rx_chan = NULL;
- chip->dma.tx_chan = NULL;
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.tx_chan);
+ clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
+ clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ chip->dma.rx_chan = NULL;
+ chip->dma.tx_chan = NULL;
+ }
snd_card_set_dev(card, NULL);
snd_card_free(card);