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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/pci/au88x0/au88x0_pcm.c
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'sound/pci/au88x0/au88x0_pcm.c')
-rw-r--r--sound/pci/au88x0/au88x0_pcm.c548
1 files changed, 548 insertions, 0 deletions
diff --git a/sound/pci/au88x0/au88x0_pcm.c b/sound/pci/au88x0/au88x0_pcm.c
new file mode 100644
index 000000000000..04dcefd8b8ff
--- /dev/null
+++ b/sound/pci/au88x0/au88x0_pcm.c
@@ -0,0 +1,548 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Vortex PCM ALSA driver.
+ *
+ * Supports ADB and WT DMA. Unfortunately, WT channels do not run yet.
+ * It remains stuck,and DMA transfers do not happen.
+ */
+#include <sound/asoundef.h>
+#include <sound/driver.h>
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "au88x0.h"
+
+#define VORTEX_PCM_TYPE(x) (x->name[40])
+
+/* hardware definition */
+static snd_pcm_hardware_t snd_vortex_playback_hw_adb = {
+ .info =
+ (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .formats =
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
+ SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 5000,
+ .rate_max = 48000,
+ .channels_min = 1,
+#ifdef CHIP_AU8830
+ .channels_max = 4,
+#else
+ .channels_max = 2,
+#endif
+ .buffer_bytes_max = 0x10000,
+ .period_bytes_min = 0x1,
+ .period_bytes_max = 0x1000,
+ .periods_min = 2,
+ .periods_max = 32,
+};
+
+#ifndef CHIP_AU8820
+static snd_pcm_hardware_t snd_vortex_playback_hw_a3d = {
+ .info =
+ (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .formats =
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
+ SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 5000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 1,
+ .buffer_bytes_max = 0x10000,
+ .period_bytes_min = 0x100,
+ .period_bytes_max = 0x1000,
+ .periods_min = 2,
+ .periods_max = 64,
+};
+#endif
+static snd_pcm_hardware_t snd_vortex_playback_hw_spdif = {
+ .info =
+ (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .formats =
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
+ SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | SNDRV_PCM_FMTBIT_MU_LAW |
+ SNDRV_PCM_FMTBIT_A_LAW,
+ .rates =
+ SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
+ .rate_min = 32000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 2,
+ .buffer_bytes_max = 0x10000,
+ .period_bytes_min = 0x100,
+ .period_bytes_max = 0x1000,
+ .periods_min = 2,
+ .periods_max = 64,
+};
+
+#ifndef CHIP_AU8810
+static snd_pcm_hardware_t snd_vortex_playback_hw_wt = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS, // SNDRV_PCM_RATE_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 2,
+ .buffer_bytes_max = 0x10000,
+ .period_bytes_min = 0x0400,
+ .period_bytes_max = 0x1000,
+ .periods_min = 2,
+ .periods_max = 64,
+};
+#endif
+/* open callback */
+static int snd_vortex_pcm_open(snd_pcm_substream_t * substream)
+{
+ vortex_t *vortex = snd_pcm_substream_chip(substream);
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ int err;
+
+ /* Force equal size periods */
+ if ((err =
+ snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+ return err;
+ /* Avoid PAGE_SIZE boundary to fall inside of a period. */
+ if ((err =
+ snd_pcm_hw_constraint_pow2(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES)) < 0)
+ return err;
+
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
+#ifndef CHIP_AU8820
+ if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_A3D) {
+ runtime->hw = snd_vortex_playback_hw_a3d;
+ }
+#endif
+ if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_SPDIF) {
+ runtime->hw = snd_vortex_playback_hw_spdif;
+ switch (vortex->spdif_sr) {
+ case 32000:
+ runtime->hw.rates = SNDRV_PCM_RATE_32000;
+ break;
+ case 44100:
+ runtime->hw.rates = SNDRV_PCM_RATE_44100;
+ break;
+ case 48000:
+ runtime->hw.rates = SNDRV_PCM_RATE_48000;
+ break;
+ }
+ }
+ if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB
+ || VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_I2S)
+ runtime->hw = snd_vortex_playback_hw_adb;
+ substream->runtime->private_data = NULL;
+ }
+#ifndef CHIP_AU8810
+ else {
+ runtime->hw = snd_vortex_playback_hw_wt;
+ substream->runtime->private_data = NULL;
+ }
+#endif
+ return 0;
+}
+
+/* close callback */
+static int snd_vortex_pcm_close(snd_pcm_substream_t * substream)
+{
+ //vortex_t *chip = snd_pcm_substream_chip(substream);
+ stream_t *stream = (stream_t *) substream->runtime->private_data;
+
+ // the hardware-specific codes will be here
+ if (stream != NULL) {
+ stream->substream = NULL;
+ stream->nr_ch = 0;
+ }
+ substream->runtime->private_data = NULL;
+ return 0;
+}
+
+/* hw_params callback */
+static int
+snd_vortex_pcm_hw_params(snd_pcm_substream_t * substream,
+ snd_pcm_hw_params_t * hw_params)
+{
+ vortex_t *chip = snd_pcm_substream_chip(substream);
+ stream_t *stream = (stream_t *) (substream->runtime->private_data);
+ snd_pcm_sgbuf_t *sgbuf;
+ int err;
+
+ // Alloc buffer memory.
+ err =
+ snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+ if (err < 0) {
+ printk(KERN_ERR "Vortex: pcm page alloc failed!\n");
+ return err;
+ }
+ //sgbuf = (snd_pcm_sgbuf_t *) substream->runtime->dma_private;
+ sgbuf = snd_pcm_substream_sgbuf(substream);
+ /*
+ printk(KERN_INFO "Vortex: periods %d, period_bytes %d, channels = %d\n", params_periods(hw_params),
+ params_period_bytes(hw_params), params_channels(hw_params));
+ */
+ spin_lock_irq(&chip->lock);
+ // Make audio routes and config buffer DMA.
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
+ int dma, type = VORTEX_PCM_TYPE(substream->pcm);
+ /* Dealloc any routes. */
+ if (stream != NULL)
+ vortex_adb_allocroute(chip, stream->dma,
+ stream->nr_ch, stream->dir,
+ stream->type);
+ /* Alloc routes. */
+ dma =
+ vortex_adb_allocroute(chip, -1,
+ params_channels(hw_params),
+ substream->stream, type);
+ if (dma < 0)
+ return dma;
+ stream = substream->runtime->private_data = &chip->dma_adb[dma];
+ stream->substream = substream;
+ /* Setup Buffers. */
+ vortex_adbdma_setbuffers(chip, dma, sgbuf,
+ params_period_bytes(hw_params),
+ params_periods(hw_params));
+ }
+#ifndef CHIP_AU8810
+ else {
+ /* if (stream != NULL)
+ vortex_wt_allocroute(chip, substream->number, 0); */
+ vortex_wt_allocroute(chip, substream->number,
+ params_channels(hw_params));
+ stream = substream->runtime->private_data =
+ &chip->dma_wt[substream->number];
+ stream->dma = substream->number;
+ stream->substream = substream;
+ vortex_wtdma_setbuffers(chip, substream->number, sgbuf,
+ params_period_bytes(hw_params),
+ params_periods(hw_params));
+ }
+#endif
+ spin_unlock_irq(&chip->lock);
+ return 0;
+}
+
+/* hw_free callback */
+static int snd_vortex_pcm_hw_free(snd_pcm_substream_t * substream)
+{
+ vortex_t *chip = snd_pcm_substream_chip(substream);
+ stream_t *stream = (stream_t *) (substream->runtime->private_data);
+
+ spin_lock_irq(&chip->lock);
+ // Delete audio routes.
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
+ if (stream != NULL)
+ vortex_adb_allocroute(chip, stream->dma,
+ stream->nr_ch, stream->dir,
+ stream->type);
+ }
+#ifndef CHIP_AU8810
+ else {
+ if (stream != NULL)
+ vortex_wt_allocroute(chip, stream->dma, 0);
+ }
+#endif
+ substream->runtime->private_data = NULL;
+ spin_unlock_irq(&chip->lock);
+
+ return snd_pcm_lib_free_pages(substream);
+}
+
+/* prepare callback */
+static int snd_vortex_pcm_prepare(snd_pcm_substream_t * substream)
+{
+ vortex_t *chip = snd_pcm_substream_chip(substream);
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ stream_t *stream = (stream_t *) substream->runtime->private_data;
+ int dma = stream->dma, fmt, dir;
+
+ // set up the hardware with the current configuration.
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dir = 1;
+ else
+ dir = 0;
+ fmt = vortex_alsafmt_aspfmt(runtime->format);
+ spin_lock_irq(&chip->lock);
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
+ vortex_adbdma_setmode(chip, dma, 1, dir, fmt, 0 /*? */ ,
+ 0);
+ vortex_adbdma_setstartbuffer(chip, dma, 0);
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_SPDIF)
+ vortex_adb_setsrc(chip, dma, runtime->rate, dir);
+ }
+#ifndef CHIP_AU8810
+ else {
+ vortex_wtdma_setmode(chip, dma, 1, fmt, 0, 0);
+ // FIXME: Set rate (i guess using vortex_wt_writereg() somehow).
+ vortex_wtdma_setstartbuffer(chip, dma, 0);
+ }
+#endif
+ spin_unlock_irq(&chip->lock);
+ return 0;
+}
+
+/* trigger callback */
+static int snd_vortex_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
+{
+ vortex_t *chip = snd_pcm_substream_chip(substream);
+ stream_t *stream = (stream_t *) substream->runtime->private_data;
+ int dma = stream->dma;
+
+ spin_lock(&chip->lock);
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ // do something to start the PCM engine
+ //printk(KERN_INFO "vortex: start %d\n", dma);
+ stream->fifo_enabled = 1;
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
+ vortex_adbdma_resetup(chip, dma);
+ vortex_adbdma_startfifo(chip, dma);
+ }
+#ifndef CHIP_AU8810
+ else {
+ printk(KERN_INFO "vortex: wt start %d\n", dma);
+ vortex_wtdma_startfifo(chip, dma);
+ }
+#endif
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ // do something to stop the PCM engine
+ //printk(KERN_INFO "vortex: stop %d\n", dma);
+ stream->fifo_enabled = 0;
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
+ vortex_adbdma_pausefifo(chip, dma);
+ //vortex_adbdma_stopfifo(chip, dma);
+#ifndef CHIP_AU8810
+ else {
+ printk(KERN_INFO "vortex: wt stop %d\n", dma);
+ vortex_wtdma_stopfifo(chip, dma);
+ }
+#endif
+ break;
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ //printk(KERN_INFO "vortex: pause %d\n", dma);
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
+ vortex_adbdma_pausefifo(chip, dma);
+#ifndef CHIP_AU8810
+ else
+ vortex_wtdma_pausefifo(chip, dma);
+#endif
+ break;
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ //printk(KERN_INFO "vortex: resume %d\n", dma);
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
+ vortex_adbdma_resumefifo(chip, dma);
+#ifndef CHIP_AU8810
+ else
+ vortex_wtdma_resumefifo(chip, dma);
+#endif
+ break;
+ default:
+ spin_unlock(&chip->lock);
+ return -EINVAL;
+ }
+ spin_unlock(&chip->lock);
+ return 0;
+}
+
+/* pointer callback */
+static snd_pcm_uframes_t snd_vortex_pcm_pointer(snd_pcm_substream_t * substream)
+{
+ vortex_t *chip = snd_pcm_substream_chip(substream);
+ stream_t *stream = (stream_t *) substream->runtime->private_data;
+ int dma = stream->dma;
+ snd_pcm_uframes_t current_ptr = 0;
+
+ spin_lock(&chip->lock);
+ if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
+ current_ptr = vortex_adbdma_getlinearpos(chip, dma);
+#ifndef CHIP_AU8810
+ else
+ current_ptr = vortex_wtdma_getlinearpos(chip, dma);
+#endif
+ //printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr);
+ spin_unlock(&chip->lock);
+ return (bytes_to_frames(substream->runtime, current_ptr));
+}
+
+/* Page callback. */
+/*
+static struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset) {
+
+
+}
+*/
+/* operators */
+static snd_pcm_ops_t snd_vortex_playback_ops = {
+ .open = snd_vortex_pcm_open,
+ .close = snd_vortex_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_vortex_pcm_hw_params,
+ .hw_free = snd_vortex_pcm_hw_free,
+ .prepare = snd_vortex_pcm_prepare,
+ .trigger = snd_vortex_pcm_trigger,
+ .pointer = snd_vortex_pcm_pointer,
+ .page = snd_pcm_sgbuf_ops_page,
+};
+
+/*
+* definitions of capture are omitted here...
+*/
+
+static char *vortex_pcm_prettyname[VORTEX_PCM_LAST] = {
+ "AU88x0 ADB",
+ "AU88x0 SPDIF",
+ "AU88x0 A3D",
+ "AU88x0 WT",
+ "AU88x0 I2S",
+};
+static char *vortex_pcm_name[VORTEX_PCM_LAST] = {
+ "adb",
+ "spdif",
+ "a3d",
+ "wt",
+ "i2s",
+};
+
+/* SPDIF kcontrol */
+
+static int snd_vortex_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+ uinfo->count = 1;
+ return 0;
+}
+
+static int snd_vortex_spdif_mask_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+ ucontrol->value.iec958.status[0] = 0xff;
+ ucontrol->value.iec958.status[1] = 0xff;
+ ucontrol->value.iec958.status[2] = 0xff;
+ ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS;
+ return 0;
+}
+
+static int snd_vortex_spdif_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+ vortex_t *vortex = snd_kcontrol_chip(kcontrol);
+ ucontrol->value.iec958.status[0] = 0x00;
+ ucontrol->value.iec958.status[1] = IEC958_AES1_CON_ORIGINAL|IEC958_AES1_CON_DIGDIGCONV_ID;
+ ucontrol->value.iec958.status[2] = 0x00;
+ switch (vortex->spdif_sr) {
+ case 32000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_32000; break;
+ case 44100: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_44100; break;
+ case 48000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_48000; break;
+ }
+ return 0;
+}
+
+static int snd_vortex_spdif_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+ vortex_t *vortex = snd_kcontrol_chip(kcontrol);
+ int spdif_sr = 48000;
+ switch (ucontrol->value.iec958.status[3] & IEC958_AES3_CON_FS) {
+ case IEC958_AES3_CON_FS_32000: spdif_sr = 32000; break;
+ case IEC958_AES3_CON_FS_44100: spdif_sr = 44100; break;
+ case IEC958_AES3_CON_FS_48000: spdif_sr = 48000; break;
+ }
+ if (spdif_sr == vortex->spdif_sr)
+ return 0;
+ vortex->spdif_sr = spdif_sr;
+ vortex_spdif_init(vortex, vortex->spdif_sr, 1);
+ return 1;
+}
+
+/* spdif controls */
+static snd_kcontrol_new_t snd_vortex_mixer_spdif[] __devinitdata = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
+ .info = snd_vortex_spdif_info,
+ .get = snd_vortex_spdif_get,
+ .put = snd_vortex_spdif_put,
+ },
+ {
+ .access = SNDRV_CTL_ELEM_ACCESS_READ,
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,CON_MASK),
+ .info = snd_vortex_spdif_info,
+ .get = snd_vortex_spdif_mask_get
+ },
+};
+
+/* create a pcm device */
+static int __devinit snd_vortex_new_pcm(vortex_t * chip, int idx, int nr)
+{
+ snd_pcm_t *pcm;
+ snd_kcontrol_t *kctl;
+ int i;
+ int err, nr_capt;
+
+ if ((chip == 0) || (idx < 0) || (idx > VORTEX_PCM_LAST))
+ return -ENODEV;
+
+ /* idx indicates which kind of PCM device. ADB, SPDIF, I2S and A3D share the
+ * same dma engine. WT uses it own separate dma engine whcih cant capture. */
+ if (idx == VORTEX_PCM_ADB)
+ nr_capt = nr;
+ else
+ nr_capt = 0;
+ if ((err =
+ snd_pcm_new(chip->card, vortex_pcm_prettyname[idx], idx, nr,
+ nr_capt, &pcm)) < 0)
+ return err;
+ strcpy(pcm->name, vortex_pcm_name[idx]);
+ chip->pcm[idx] = pcm;
+ // This is an evil hack, but it saves a lot of duplicated code.
+ VORTEX_PCM_TYPE(pcm) = idx;
+ pcm->private_data = chip;
+ /* set operators */
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &snd_vortex_playback_ops);
+ if (idx == VORTEX_PCM_ADB)
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_vortex_playback_ops);
+
+ /* pre-allocation of Scatter-Gather buffers */
+
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
+ snd_dma_pci_data(chip->pci_dev),
+ 0x10000, 0x10000);
+
+ if (VORTEX_PCM_TYPE(pcm) == VORTEX_PCM_SPDIF) {
+ for (i = 0; i < ARRAY_SIZE(snd_vortex_mixer_spdif); i++) {
+ kctl = snd_ctl_new1(&snd_vortex_mixer_spdif[i], chip);
+ if (!kctl)
+ return -ENOMEM;
+ if ((err = snd_ctl_add(chip->card, kctl)) < 0)
+ return err;
+ }
+ }
+ return 0;
+}