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-rw-r--r--sound/usb/caiaq/device.c8
-rw-r--r--sound/usb/card.c2
-rw-r--r--sound/usb/midi.c4
-rw-r--r--sound/usb/mixer.c18
-rw-r--r--sound/usb/mixer_maps.c17
-rw-r--r--sound/usb/mixer_quirks.c74
-rw-r--r--sound/usb/pcm.c36
-rw-r--r--sound/usb/quirks-table.h101
-rw-r--r--sound/usb/quirks.c36
-rw-r--r--sound/usb/usbaudio.h1
10 files changed, 244 insertions, 53 deletions
diff --git a/sound/usb/caiaq/device.c b/sound/usb/caiaq/device.c
index c828f8189c25..e4d6dbb0342d 100644
--- a/sound/usb/caiaq/device.c
+++ b/sound/usb/caiaq/device.c
@@ -48,10 +48,10 @@ MODULE_SUPPORTED_DEVICE("{{Native Instruments, RigKontrol2},"
"{Native Instruments, Audio 8 DJ},"
"{Native Instruments, Traktor Audio 2},"
"{Native Instruments, Session I/O},"
- "{Native Instruments, GuitarRig mobile}"
- "{Native Instruments, Traktor Kontrol X1}"
- "{Native Instruments, Traktor Kontrol S4}"
- "{Native Instruments, Maschine Controller}");
+ "{Native Instruments, GuitarRig mobile},"
+ "{Native Instruments, Traktor Kontrol X1},"
+ "{Native Instruments, Traktor Kontrol S4},"
+ "{Native Instruments, Maschine Controller}}");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
diff --git a/sound/usb/card.c b/sound/usb/card.c
index ccf95cfe186f..803953a9bff3 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -646,7 +646,7 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
as->substream[0].need_setup_ep =
as->substream[1].need_setup_ep = true;
}
- }
+ }
} else {
/*
* otherwise we keep the rest of the system in the dark
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index c183d34842ac..34b9bb7fe87c 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -2181,10 +2181,6 @@ int snd_usbmidi_create(struct snd_card *card,
umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
break;
- case QUIRK_MIDI_MBOX2:
- umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
- err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
- break;
case QUIRK_MIDI_RAW_BYTES:
umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
/*
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index ed4d89c8b52a..638e7f738018 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -807,6 +807,7 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
{
switch (cval->mixer->chip->usb_id) {
case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+ case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
if (strcmp(kctl->id.name, "Effect Duration") == 0) {
cval->min = 0x0000;
cval->max = 0xffff;
@@ -1331,16 +1332,23 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void
}
channels = (hdr->bLength - 7) / csize - 1;
bmaControls = hdr->bmaControls;
+ if (hdr->bLength < 7 + csize) {
+ snd_printk(KERN_ERR "usbaudio: unit %u: "
+ "invalid UAC_FEATURE_UNIT descriptor\n",
+ unitid);
+ return -EINVAL;
+ }
} else {
struct uac2_feature_unit_descriptor *ftr = _ftr;
csize = 4;
channels = (hdr->bLength - 6) / 4 - 1;
bmaControls = ftr->bmaControls;
- }
-
- if (hdr->bLength < 7 || !csize || hdr->bLength < 7 + csize) {
- snd_printk(KERN_ERR "usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid);
- return -EINVAL;
+ if (hdr->bLength < 6 + csize) {
+ snd_printk(KERN_ERR "usbaudio: unit %u: "
+ "invalid UAC_FEATURE_UNIT descriptor\n",
+ unitid);
+ return -EINVAL;
+ }
}
/* parse the source unit */
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index e71fe55cebef..cc2dd1f0decb 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -179,6 +179,15 @@ static struct usbmix_name_map audigy2nx_map[] = {
{ 0 } /* terminator */
};
+static struct usbmix_selector_map c400_selectors[] = {
+ {
+ .id = 0x80,
+ .count = 2,
+ .names = (const char*[]) {"Internal", "SPDIF"}
+ },
+ { 0 } /* terminator */
+};
+
static struct usbmix_selector_map audigy2nx_selectors[] = {
{
.id = 14, /* Capture Source */
@@ -367,6 +376,14 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
.map = hercules_usb51_map,
},
{
+ .id = USB_ID(0x0763, 0x2030),
+ .selector_map = c400_selectors,
+ },
+ {
+ .id = USB_ID(0x0763, 0x2031),
+ .selector_map = c400_selectors,
+ },
+ {
.id = USB_ID(0x08bb, 0x2702),
.map = linex_map,
.ignore_ctl_error = 1,
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 0422b1360af3..497d2741d119 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -637,7 +637,7 @@ static int snd_nativeinstruments_create_mixer(struct usb_mixer_interface *mixer,
}
/* M-Audio FastTrack Ultra quirks */
-/* FTU Effect switch (also used by C400) */
+/* FTU Effect switch (also used by C400/C600) */
struct snd_ftu_eff_switch_priv_val {
struct usb_mixer_interface *mixer;
int cached_value;
@@ -1029,32 +1029,45 @@ void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
}
}
-/* M-Audio Fast Track C400 */
-/* C400 volume controls, this control needs a volume quirk, see mixer.c */
+/* M-Audio Fast Track C400/C600 */
+/* C400/C600 volume controls, this control needs a volume quirk, see mixer.c */
static int snd_c400_create_vol_ctls(struct usb_mixer_interface *mixer)
{
char name[64];
unsigned int cmask, offset;
int out, chan, err;
+ int num_outs = 0;
+ int num_ins = 0;
const unsigned int id = 0x40;
const int val_type = USB_MIXER_S16;
const int control = 1;
- for (chan = 0; chan < 10; chan++) {
- for (out = 0; out < 6; out++) {
- if (chan < 6) {
+ switch (mixer->chip->usb_id) {
+ case USB_ID(0x0763, 0x2030):
+ num_outs = 6;
+ num_ins = 4;
+ break;
+ case USB_ID(0x0763, 0x2031):
+ num_outs = 8;
+ num_ins = 6;
+ break;
+ }
+
+ for (chan = 0; chan < num_outs + num_ins; chan++) {
+ for (out = 0; out < num_outs; out++) {
+ if (chan < num_outs) {
snprintf(name, sizeof(name),
"PCM%d-Out%d Playback Volume",
chan + 1, out + 1);
} else {
snprintf(name, sizeof(name),
"In%d-Out%d Playback Volume",
- chan - 5, out + 1);
+ chan - num_outs + 1, out + 1);
}
cmask = (out == 0) ? 0 : 1 << (out - 1);
- offset = chan * 6;
+ offset = chan * num_outs;
err = snd_create_std_mono_ctl_offset(mixer, id, control,
cmask, val_type, offset, name,
&snd_usb_mixer_vol_tlv);
@@ -1110,20 +1123,33 @@ static int snd_c400_create_effect_vol_ctls(struct usb_mixer_interface *mixer)
char name[64];
unsigned int cmask;
int chan, err;
+ int num_outs = 0;
+ int num_ins = 0;
const unsigned int id = 0x42;
const int val_type = USB_MIXER_S16;
const int control = 1;
- for (chan = 0; chan < 10; chan++) {
- if (chan < 6) {
+ switch (mixer->chip->usb_id) {
+ case USB_ID(0x0763, 0x2030):
+ num_outs = 6;
+ num_ins = 4;
+ break;
+ case USB_ID(0x0763, 0x2031):
+ num_outs = 8;
+ num_ins = 6;
+ break;
+ }
+
+ for (chan = 0; chan < num_outs + num_ins; chan++) {
+ if (chan < num_outs) {
snprintf(name, sizeof(name),
"Effect Send DOut%d",
chan + 1);
} else {
snprintf(name, sizeof(name),
"Effect Send AIn%d",
- chan - 5);
+ chan - num_outs + 1);
}
cmask = (chan == 0) ? 0 : 1 << (chan - 1);
@@ -1142,20 +1168,33 @@ static int snd_c400_create_effect_ret_vol_ctls(struct usb_mixer_interface *mixer
char name[64];
unsigned int cmask;
int chan, err;
+ int num_outs = 0;
+ int offset = 0;
const unsigned int id = 0x40;
const int val_type = USB_MIXER_S16;
const int control = 1;
- const int chan_id[6] = { 0, 7, 2, 9, 4, 0xb };
- const unsigned int offset = 0x3c;
- /* { 0x3c, 0x43, 0x3e, 0x45, 0x40, 0x47 } */
- for (chan = 0; chan < 6; chan++) {
+ switch (mixer->chip->usb_id) {
+ case USB_ID(0x0763, 0x2030):
+ num_outs = 6;
+ offset = 0x3c;
+ /* { 0x3c, 0x43, 0x3e, 0x45, 0x40, 0x47 } */
+ break;
+ case USB_ID(0x0763, 0x2031):
+ num_outs = 8;
+ offset = 0x70;
+ /* { 0x70, 0x79, 0x72, 0x7b, 0x74, 0x7d, 0x76, 0x7f } */
+ break;
+ }
+
+ for (chan = 0; chan < num_outs; chan++) {
snprintf(name, sizeof(name),
"Effect Return %d",
chan + 1);
- cmask = (chan_id[chan] == 0) ? 0 : 1 << (chan_id[chan] - 1);
+ cmask = (chan == 0) ? 0 :
+ 1 << (chan + (chan % 2) * num_outs - 1);
err = snd_create_std_mono_ctl_offset(mixer, id, control,
cmask, val_type, offset, name,
&snd_usb_mixer_vol_tlv);
@@ -1206,7 +1245,7 @@ static int snd_c400_create_mixer(struct usb_mixer_interface *mixer)
* are valid they presents mono controls as L and R channels of
* stereo. So we provide a good mixer here.
*/
-struct std_mono_table ebox44_table[] = {
+static struct std_mono_table ebox44_table[] = {
{
.unitid = 4,
.control = 1,
@@ -1299,6 +1338,7 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
break;
case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+ case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C400 */
err = snd_c400_create_mixer(mixer);
break;
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index c6593101c049..f94397b42aa5 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -59,7 +59,12 @@ snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
/* Approximation based on number of samples per USB frame (ms),
some truncation for 44.1 but the estimate is good enough */
- est_delay = subs->last_delay - (frame_diff * rate / 1000);
+ est_delay = frame_diff * rate / 1000;
+ if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
+ est_delay = subs->last_delay - est_delay;
+ else
+ est_delay = subs->last_delay + est_delay;
+
if (est_delay < 0)
est_delay = 0;
return est_delay;
@@ -78,8 +83,7 @@ static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream
return SNDRV_PCM_POS_XRUN;
spin_lock(&subs->lock);
hwptr_done = subs->hwptr_done;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- substream->runtime->delay = snd_usb_pcm_delay(subs,
+ substream->runtime->delay = snd_usb_pcm_delay(subs,
substream->runtime->rate);
spin_unlock(&subs->lock);
return hwptr_done / (substream->runtime->frame_bits >> 3);
@@ -363,6 +367,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
switch (subs->stream->chip->usb_id) {
case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+ case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
if (is_playback) {
implicit_fb = 1;
ep = 0x81;
@@ -511,6 +516,16 @@ static int configure_sync_endpoint(struct snd_usb_substream *subs)
struct snd_usb_substream *sync_subs =
&subs->stream->substream[subs->direction ^ 1];
+ if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
+ !subs->stream)
+ return snd_usb_endpoint_set_params(subs->sync_endpoint,
+ subs->pcm_format,
+ subs->channels,
+ subs->period_bytes,
+ subs->cur_rate,
+ subs->cur_audiofmt,
+ NULL);
+
/* Try to find the best matching audioformat. */
list_for_each_entry(fp, &sync_subs->fmt_list, list) {
int score = match_endpoint_audioformats(fp, subs->cur_audiofmt,
@@ -1147,6 +1162,10 @@ static void retire_capture_urb(struct snd_usb_substream *subs,
int i, period_elapsed = 0;
unsigned long flags;
unsigned char *cp;
+ int current_frame_number;
+
+ /* read frame number here, update pointer in critical section */
+ current_frame_number = usb_get_current_frame_number(subs->dev);
stride = runtime->frame_bits >> 3;
@@ -1161,9 +1180,7 @@ static void retire_capture_urb(struct snd_usb_substream *subs,
if (!subs->txfr_quirk)
bytes = frames * stride;
if (bytes % (runtime->sample_bits >> 3) != 0) {
-#ifdef CONFIG_SND_DEBUG_VERBOSE
int oldbytes = bytes;
-#endif
bytes = frames * stride;
snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
oldbytes, bytes);
@@ -1180,6 +1197,15 @@ static void retire_capture_urb(struct snd_usb_substream *subs,
subs->transfer_done -= runtime->period_size;
period_elapsed = 1;
}
+ /* capture delay is by construction limited to one URB,
+ * reset delays here
+ */
+ runtime->delay = subs->last_delay = 0;
+
+ /* realign last_frame_number */
+ subs->last_frame_number = current_frame_number;
+ subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
+
spin_unlock_irqrestore(&subs->lock, flags);
/* copy a data chunk */
if (oldptr + bytes > runtime->buffer_size * stride) {
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index cdcf6b45e8a8..c39f898b15d2 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -50,6 +50,28 @@
}
},
+{
+ /* Creative BT-D1 */
+ USB_DEVICE(0x041e, 0x0005),
+ .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+ .ifnum = 1,
+ .type = QUIRK_AUDIO_FIXED_ENDPOINT,
+ .data = &(const struct audioformat) {
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .channels = 2,
+ .iface = 1,
+ .altsetting = 1,
+ .altset_idx = 1,
+ .endpoint = 0x03,
+ .ep_attr = USB_ENDPOINT_XFER_ISOC,
+ .attributes = 0,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ }
+ }
+},
+
/* Creative/Toshiba Multimedia Center SB-0500 */
{
USB_DEVICE(0x041e, 0x3048),
@@ -1728,7 +1750,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
/* .vendor_name = "Roland", */
/* .product_name = "A-PRO", */
- .ifnum = 1,
+ .ifnum = 0,
.type = QUIRK_MIDI_FIXED_ENDPOINT,
.data = & (const struct snd_usb_midi_endpoint_info) {
.out_cables = 0x0003,
@@ -2267,7 +2289,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
.rate_table = (unsigned int[]) {
44100, 48000, 88200, 96000
},
- .clock = 0x81,
+ .clock = 0x80,
}
},
/* Capture */
@@ -2293,7 +2315,78 @@ YAMAHA_DEVICE(0x7010, "UB99"),
.rate_table = (unsigned int[]) {
44100, 48000, 88200, 96000
},
- .clock = 0x81,
+ .clock = 0x80,
+ }
+ },
+ /* MIDI */
+ {
+ .ifnum = -1 /* Interface = 4 */
+ }
+ }
+ }
+},
+{
+ USB_DEVICE_VENDOR_SPEC(0x0763, 0x2031),
+ .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+ /* .vendor_name = "M-Audio", */
+ /* .product_name = "Fast Track C600", */
+ .ifnum = QUIRK_ANY_INTERFACE,
+ .type = QUIRK_COMPOSITE,
+ .data = &(const struct snd_usb_audio_quirk[]) {
+ {
+ .ifnum = 1,
+ .type = QUIRK_AUDIO_STANDARD_MIXER,
+ },
+ /* Playback */
+ {
+ .ifnum = 2,
+ .type = QUIRK_AUDIO_FIXED_ENDPOINT,
+ .data = &(const struct audioformat) {
+ .formats = SNDRV_PCM_FMTBIT_S24_3LE,
+ .channels = 8,
+ .iface = 2,
+ .altsetting = 1,
+ .altset_idx = 1,
+ .attributes = UAC_EP_CS_ATTR_SAMPLE_RATE,
+ .endpoint = 0x01,
+ .ep_attr = 0x09,
+ .rates = SNDRV_PCM_RATE_44100 |
+ SNDRV_PCM_RATE_48000 |
+ SNDRV_PCM_RATE_88200 |
+ SNDRV_PCM_RATE_96000,
+ .rate_min = 44100,
+ .rate_max = 96000,
+ .nr_rates = 4,
+ .rate_table = (unsigned int[]) {
+ 44100, 48000, 88200, 96000
+ },
+ .clock = 0x80,
+ }
+ },
+ /* Capture */
+ {
+ .ifnum = 3,
+ .type = QUIRK_AUDIO_FIXED_ENDPOINT,
+ .data = &(const struct audioformat) {
+ .formats = SNDRV_PCM_FMTBIT_S24_3LE,
+ .channels = 6,
+ .iface = 3,
+ .altsetting = 1,
+ .altset_idx = 1,
+ .attributes = UAC_EP_CS_ATTR_SAMPLE_RATE,
+ .endpoint = 0x81,
+ .ep_attr = 0x05,
+ .rates = SNDRV_PCM_RATE_44100 |
+ SNDRV_PCM_RATE_48000 |
+ SNDRV_PCM_RATE_88200 |
+ SNDRV_PCM_RATE_96000,
+ .rate_min = 44100,
+ .rate_max = 96000,
+ .nr_rates = 4,
+ .rate_table = (unsigned int[]) {
+ 44100, 48000, 88200, 96000
+ },
+ .clock = 0x80,
}
},
/* MIDI */
@@ -2993,7 +3086,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
},
{
.ifnum = 6,
- .type = QUIRK_MIDI_MBOX2,
+ .type = QUIRK_MIDI_MIDIMAN,
.data = &(const struct snd_usb_midi_endpoint_info) {
.out_ep = 0x02,
.out_cables = 0x0001,
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index f104c68fe1e0..5325a3869bb7 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -306,7 +306,6 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip,
[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
- [QUIRK_MIDI_MBOX2] = create_any_midi_quirk,
[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
[QUIRK_MIDI_CME] = create_any_midi_quirk,
@@ -388,11 +387,13 @@ static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
* rules
*/
err = usb_driver_set_configuration(dev, 2);
- if (err < 0) {
+ if (err < 0)
snd_printdd("error usb_driver_set_configuration: %d\n",
err);
- return -ENODEV;
- }
+ /* Always return an error, so that we stop creating a device
+ that will just be destroyed and recreated with a new
+ configuration */
+ return -ENODEV;
} else
snd_printk(KERN_INFO "usb-audio: Fast Track Pro config OK\n");
@@ -528,11 +529,11 @@ static void mbox2_setup_48_24_magic(struct usb_device *dev)
#define MBOX2_BOOT_LOADING 0x01 /* Hard coded into the device */
#define MBOX2_BOOT_READY 0x02 /* Hard coded into the device */
-int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
+static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
{
struct usb_host_config *config = dev->actconfig;
int err;
- u8 bootresponse;
+ u8 bootresponse[0x12];
int fwsize;
int count;
@@ -546,20 +547,20 @@ int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
snd_printd("usb-audio: Sending Digidesign Mbox 2 boot sequence...\n");
count = 0;
- bootresponse = MBOX2_BOOT_LOADING;
- while ((bootresponse == MBOX2_BOOT_LOADING) && (count < 10)) {
+ bootresponse[0] = MBOX2_BOOT_LOADING;
+ while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
msleep(500); /* 0.5 second delay */
snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
/* Control magic - load onboard firmware */
0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
- if (bootresponse == MBOX2_BOOT_READY)
+ if (bootresponse[0] == MBOX2_BOOT_READY)
break;
snd_printd("usb-audio: device not ready, resending boot sequence...\n");
count++;
}
- if (bootresponse != MBOX2_BOOT_READY) {
- snd_printk(KERN_ERR "usb-audio: Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse);
+ if (bootresponse[0] != MBOX2_BOOT_READY) {
+ snd_printk(KERN_ERR "usb-audio: Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
return -ENODEV;
}
@@ -660,7 +661,6 @@ static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
return 0; /* keep this altsetting */
}
-
static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
int iface, int altno)
{
@@ -861,6 +861,18 @@ void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
if ((le16_to_cpu(ep->chip->dev->descriptor.idVendor) == 0x23ba) &&
ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
ep->skip_packets = 4;
+
+ /*
+ * M-Audio Fast Track C400/C600 - when packets are not skipped, real
+ * world latency varies by approx. +/- 50 frames (at 96KHz) each time
+ * the stream is (re)started. When skipping packets 16 at endpoint
+ * start up, the real world latency is stable within +/- 1 frame (also
+ * across power cycles).
+ */
+ if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
+ ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
+ ep->type == SND_USB_ENDPOINT_TYPE_DATA)
+ ep->skip_packets = 16;
}
void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index a8172c119796..1ac3fd9cc5a6 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -76,7 +76,6 @@ enum quirk_type {
QUIRK_MIDI_YAMAHA,
QUIRK_MIDI_MIDIMAN,
QUIRK_MIDI_NOVATION,
- QUIRK_MIDI_MBOX2,
QUIRK_MIDI_RAW_BYTES,
QUIRK_MIDI_EMAGIC,
QUIRK_MIDI_CME,
generated by cgit v1.2.3 (git 2.0.4) at 2025-06-03 22:11:53 +0000