This commit allows this driver to support some models which M-Audio produces with DM1000 but its firmware is special. They are: - Firewire 1814 - ProjectMix I/O
They have heavily customized firmware. The usual operations can't be applied to them. For this reason, this commit adds some model specific members in 'struct snd_bebob' and model specific functions. Some parameters are write-only so this commit also adds control interface for them.
M-Audio special firmware quirks: - Just after powering on, they wait to download firmware. This state is changed when receiving cue. Then bus reset is generated and the device is recognized as a different model with the uploaded firmware. - They don't respond against BridgeCo AV/C extension commands. So drivers can't get their stream formations and so on. - They do not start to transmit packets only by establishing connection but also by receiving SIGNAL FORMAT command. - They can't handle frequent transactions. In this reason, this driver often fail to handle them.
This module don't support to upload firmware.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/Kconfig | 1 + sound/firewire/bebob/bebob.c | 17 +- sound/firewire/bebob/bebob.h | 13 + sound/firewire/bebob/bebob_maudio.c | 492 +++++++++++++++++++++++++++++++++++- sound/firewire/bebob/bebob_stream.c | 22 +- 5 files changed, 539 insertions(+), 6 deletions(-)
diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig index d71faf6..1149997 100644 --- a/sound/firewire/Kconfig +++ b/sound/firewire/Kconfig @@ -111,6 +111,7 @@ config SND_BEBOB * Focusrite Saffire/Saffire LE/SaffirePro10 IO/SaffirePro26 IO * M-Audio Firewire410/AudioPhile/Solo * M-Audio Ozonic/NRV10/ProfireLightBridge + * M-Audio Firewire 1814/ProjectMix IO
To compile this driver as a module, choose M here: the module will be called snd-bebob. diff --git a/sound/firewire/bebob/bebob.c b/sound/firewire/bebob/bebob.c index 65554ef..65e856e 100644 --- a/sound/firewire/bebob/bebob.c +++ b/sound/firewire/bebob/bebob.c @@ -60,6 +60,8 @@ static unsigned int devices_used;
#define MODEL_FOCUSRITE_SAFFIRE_BOTH 0x00000000 #define MODEL_MAUDIO_AUDIOPHILE_BOTH 0x00010060 +#define MODEL_MAUDIO_FW1814 0x00010071 +#define MODEL_MAUDIO_PROJECTMIX 0x00010091
static int name_device(struct snd_bebob *bebob, unsigned int vendor_id) @@ -212,7 +214,14 @@ bebob_probe(struct fw_unit *unit, if (err < 0) goto error;
- err = snd_bebob_stream_discover(bebob); + if ((entry->vendor_id == VEN_MAUDIO1) && + (entry->model_id == MODEL_MAUDIO_FW1814)) + err = snd_bebob_maudio_special_discover(bebob, true); + else if ((entry->vendor_id == VEN_MAUDIO1) && + (entry->model_id == MODEL_MAUDIO_PROJECTMIX)) + err = snd_bebob_maudio_special_discover(bebob, false); + else + err = snd_bebob_stream_discover(bebob); if (err < 0) goto error;
@@ -370,6 +379,12 @@ static const struct ieee1394_device_id bebob_id_table[] = { SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, 0x00010081, &maudio_nrv10_spec), /* M-Audio, ProFireLightbridge */ SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, 0x000100a1, &spec_normal), + /* Firewire 1814 */ + SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, MODEL_MAUDIO_FW1814, + &maudio_special_spec), + /* M-Audio ProjectMix */ + SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, MODEL_MAUDIO_PROJECTMIX, + &maudio_special_spec), /* Ids are unknown but able to be supported */ /* Mackie, Digital X Bus x.200 */ /* Mackie, Digital X Bus x.400 */ diff --git a/sound/firewire/bebob/bebob.h b/sound/firewire/bebob/bebob.h index c67d5e5..c65e7b3 100644 --- a/sound/firewire/bebob/bebob.h +++ b/sound/firewire/bebob/bebob.h @@ -100,6 +100,16 @@ struct snd_bebob { int dev_lock_count; bool dev_lock_changed; wait_queue_head_t hwdep_wait; + + /* for M-Audio special devices */ + bool maudio_special_quirk; + bool maudio_is1814; + unsigned int clk_src; + unsigned int dig_in_iface; + unsigned int dig_in_fmt; + unsigned int dig_out_fmt; + unsigned int clk_lock; + struct snd_ctl_elem_id *ctl_id_sync; };
static inline int @@ -241,6 +251,9 @@ extern struct snd_bebob_spec maudio_solo_spec; extern struct snd_bebob_spec maudio_ozonic_spec; extern struct snd_bebob_spec maudio_nrv10_spec;
+extern struct snd_bebob_spec maudio_special_spec; +int snd_bebob_maudio_special_discover(struct snd_bebob *bebob, bool is1814); + #define SND_BEBOB_DEV_ENTRY(vendor, model, data) \ { \ .match_flags = IEEE1394_MATCH_VENDOR_ID | \ diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c index 715cf34..b941042 100644 --- a/sound/firewire/bebob/bebob_maudio.c +++ b/sound/firewire/bebob/bebob_maudio.c @@ -7,9 +7,10 @@ */
#include "./bebob.h" +#include <sound/control.h>
/* - * Just powering on, Firewire 410/Audiophile wait to + * Just powering on, Firewire 410/Audiophile/1814 and ProjectMix I/O wait to * download firmware blob. To enable these devices, drivers should upload * firmware blob and send a command to initialize configuration to factory * settings when completing uploading. Then these devices generate bus reset @@ -22,6 +23,12 @@ * Without streaming, the devices except for Firewire Audiophile can mix any * input and output. For this reason, Audiophile cannot be used as standalone * mixer. + * + * Firewire 1814 and ProjectMix I/O uses special firmware. It will be freezed + * when receiving any commands which the firmware can't understand. These + * devices utilize completely different system to control. It is some + * write-transaction directly into a certain address. All of addresses for mixer + * functionality is between 0xffc700700000 to 0xffc70070009c. */
#define MAUDIO_SPECIFIC_ADDRESS 0xffc700000000 @@ -29,6 +36,7 @@ #define METER_OFFSET 0x00600000
/* some device has sync info after metering data */ +#define METER_SIZE_SPECIAL 84 /* with sync info */ #define METER_SIZE_FW410 76 /* with sync info */ #define METER_SIZE_AUDIOPHILE 60 /* with sync info */ #define METER_SIZE_SOLO 52 /* with sync info */ @@ -79,7 +87,466 @@ end: return err; }
-/* Firewire 410 specific operation */ +/* + * dig_fmt: 0x00:S/PDIF, 0x01:ADAT + * clk_lock: 0x00:unlock, 0x01:lock + */ +static int +special_clk_set_params(struct snd_bebob *bebob, unsigned int clk_src, + unsigned int dig_in_fmt, unsigned int dig_out_fmt, + unsigned int clk_lock) +{ + int err; + u8 *buf; + + if (amdtp_stream_running(&bebob->rx_stream) || + amdtp_stream_running(&bebob->tx_stream)) + return -EBUSY; + + buf = kmalloc(12, GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + buf[0] = 0x00; /* CONTROL */ + buf[1] = 0xff; /* UNIT */ + buf[2] = 0x00; /* vendor dependent */ + buf[3] = 0x04; /* company ID high */ + buf[4] = 0x00; /* company ID middle */ + buf[5] = 0x04; /* company ID low */ + buf[6] = 0xff & clk_src; /* clock source */ + buf[7] = 0xff & dig_in_fmt; /* input digital format */ + buf[8] = 0xff & dig_out_fmt; /* output digital format */ + buf[9] = 0xff & clk_lock; /* lock these settings */ + buf[10] = 0x00; /* padding */ + buf[11] = 0x00; /* padding */ + + /* do transaction and check buf[1-9] are the same against command */ + err = fcp_avc_transaction(bebob->unit, buf, 12, buf, 12, + BIT(1) | BIT(2) | BIT(3) | BIT(4) | + BIT(5) | BIT(6) | BIT(7) | BIT(8) | + BIT(9)); + if (err < 0) + goto end; + if ((err < 6) || (buf[0] != 0x09)) { + dev_err(&bebob->unit->device, + "failed to set clock params\n"); + err = -EIO; + goto end; + } + + bebob->clk_src = buf[6]; + bebob->dig_in_fmt = buf[7]; + bebob->dig_out_fmt = buf[8]; + bebob->clk_lock = buf[9]; + + snd_ctl_notify(bebob->card, SNDRV_CTL_EVENT_MASK_VALUE, + bebob->ctl_id_sync); +end: + kfree(buf); + return err; +} +static void +special_stream_formation_set(struct snd_bebob *bebob) +{ + unsigned int i; + + /* + * the stream formation is different depending on digital interface + */ + if (bebob->dig_in_fmt == 0x01) { + bebob->tx_stream_formations[3].pcm = 16; + bebob->tx_stream_formations[4].pcm = 16; + bebob->tx_stream_formations[5].pcm = 12; + bebob->tx_stream_formations[6].pcm = 12; + if (bebob->maudio_is1814) { + bebob->tx_stream_formations[7].pcm = 2; + bebob->tx_stream_formations[8].pcm = 2; + } + } else { + bebob->tx_stream_formations[3].pcm = 10; + bebob->tx_stream_formations[4].pcm = 10; + bebob->tx_stream_formations[5].pcm = 10; + bebob->tx_stream_formations[6].pcm = 10; + if (bebob->maudio_is1814) { + bebob->tx_stream_formations[7].pcm = 2; + bebob->tx_stream_formations[8].pcm = 2; + } + } + + if (bebob->dig_out_fmt == 0x01) { + bebob->rx_stream_formations[3].pcm = 12; + bebob->rx_stream_formations[4].pcm = 12; + bebob->rx_stream_formations[5].pcm = 8; + bebob->rx_stream_formations[6].pcm = 8; + if (bebob->maudio_is1814) { + bebob->rx_stream_formations[7].pcm = 4; + bebob->rx_stream_formations[8].pcm = 4; + } + } else { + bebob->rx_stream_formations[3].pcm = 6; + bebob->rx_stream_formations[4].pcm = 6; + bebob->rx_stream_formations[5].pcm = 6; + bebob->rx_stream_formations[6].pcm = 6; + if (bebob->maudio_is1814) { + bebob->rx_stream_formations[7].pcm = 4; + bebob->rx_stream_formations[8].pcm = 4; + } + } + + for (i = 3; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) { + bebob->tx_stream_formations[i].midi = 1; + bebob->rx_stream_formations[i].midi = 1; + if ((i > 7) && !bebob->maudio_is1814) + break; + } +} + +static int snd_bebob_maudio_special_add_controls(struct snd_bebob *bebob); +int +snd_bebob_maudio_special_discover(struct snd_bebob *bebob, bool is1814) +{ + int err; + + bebob->maudio_is1814 = is1814; + + /* initialize these parameters because driver is not allowed to ask */ + err = special_clk_set_params(bebob, 0x03, 0x00, 0x00, 0x00); + if (err < 0) + dev_err(&bebob->unit->device, + "failed to initialize clock params\n"); + + err = avc_audio_get_selector(bebob->unit, 0x00, 0x04, + &bebob->dig_in_iface); + if (err < 0) + dev_err(&bebob->unit->device, + "failed to get current dig iface."); + + err = snd_bebob_maudio_special_add_controls(bebob); + if (err < 0) + return -EIO; + + special_stream_formation_set(bebob); + + if (bebob->maudio_is1814) { + bebob->midi_input_ports = 1; + bebob->midi_output_ports = 1; + } else { + bebob->midi_input_ports = 2; + bebob->midi_output_ports = 2; + } + + bebob->maudio_special_quirk = true; + + return 0; +} + +/* Input plug shows actual rate. Output plug is needless for this purpose. */ +static int special_get_rate(struct snd_bebob *bebob, unsigned int *rate) +{ + return snd_bebob_get_rate(bebob, rate, AVC_GENERAL_PLUG_DIR_IN); +} +static int special_set_rate(struct snd_bebob *bebob, unsigned int rate) +{ + int err = snd_bebob_set_rate(bebob, rate, AVC_GENERAL_PLUG_DIR_OUT); + msleep(100); + if (err < 0) + goto end; + + err = snd_bebob_set_rate(bebob, rate, AVC_GENERAL_PLUG_DIR_IN); + msleep(100); + if (err >= 0) + snd_ctl_notify(bebob->card, SNDRV_CTL_EVENT_MASK_VALUE, + bebob->ctl_id_sync); +end: + return err; +} + +/* Clock source control for special firmware */ +static char *special_clk_labels[] = { + SND_BEBOB_CLOCK_INTERNAL " with Digital Mute", "Digital", + "Word Clock", SND_BEBOB_CLOCK_INTERNAL}; +static int special_clk_get(struct snd_bebob *bebob, + unsigned int *id) +{ + *id = bebob->clk_src; + return 0; +} +static int special_clk_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *einf) +{ + einf->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + einf->count = 1; + einf->value.enumerated.items = ARRAY_SIZE(special_clk_labels); + + if (einf->value.enumerated.item >= einf->value.enumerated.items) + einf->value.enumerated.item = einf->value.enumerated.items - 1; + + strcpy(einf->value.enumerated.name, + special_clk_labels[einf->value.enumerated.item]); + + return 0; +} +static int special_clk_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uval) +{ + struct snd_bebob *bebob = snd_kcontrol_chip(kctl); + + spin_lock(&bebob->lock); + uval->value.enumerated.item[0] = bebob->clk_src; + spin_unlock(&bebob->lock); + + return 0; +} +static int special_clk_ctl_put(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uval) +{ + struct snd_bebob *bebob = snd_kcontrol_chip(kctl); + int err, id, changed = 0; + + id = uval->value.enumerated.item[0]; + if (id >= ARRAY_SIZE(special_clk_labels)) + return 0; + + spin_lock(&bebob->lock); + err = special_clk_set_params(bebob, id, + bebob->dig_in_fmt, + bebob->dig_out_fmt, + bebob->clk_lock); + changed = (err >= 0); + spin_unlock(&bebob->lock); + + return changed; +} +static struct snd_kcontrol_new special_clk_ctl = { + .name = "Clock Source", + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = special_clk_ctl_info, + .get = special_clk_ctl_get, + .put = special_clk_ctl_put +}; + +/* Clock synchronization control for special firmware */ +static int special_sync_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *einf) +{ + einf->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + einf->count = 1; + einf->value.integer.min = 0; + einf->value.integer.max = 1; + + return 0; +} +static int special_sync_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uval) +{ + struct snd_bebob *bebob = snd_kcontrol_chip(kctl); + int err; + bool synced = 0; + + mutex_lock(&bebob->mutex); + err = check_clk_sync(bebob, METER_SIZE_SPECIAL, &synced); + if (err >= 0) + uval->value.integer.value[0] = synced; + mutex_unlock(&bebob->mutex); + + return 0; +} +static struct snd_kcontrol_new special_sync_ctl = { + .name = "Sync Status", + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = special_sync_ctl_info, + .get = special_sync_ctl_get, +}; + +/* Digital interface control for special firmware */ +static char *special_dig_iface_labels[] = { + "S/PDIF Optical", "S/PDIF Coaxial", "ADAT Optical" +}; +static int special_dig_in_iface_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *einf) +{ + einf->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + einf->count = 1; + einf->value.enumerated.items = ARRAY_SIZE(special_dig_iface_labels); + + if (einf->value.enumerated.item >= einf->value.enumerated.items) + einf->value.enumerated.item = einf->value.enumerated.items - 1; + + strcpy(einf->value.enumerated.name, + special_dig_iface_labels[einf->value.enumerated.item]); + + return 0; +} +static int special_dig_in_iface_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uval) +{ + struct snd_bebob *bebob = snd_kcontrol_chip(kctl); + int val; + + /* encoded id for user value */ + val = (bebob->dig_in_fmt << 1) | (bebob->dig_in_iface & 0x01); + + /* for ADAT Optical */ + if (val > 2) + val = 2; + + uval->value.enumerated.item[0] = val; + + return 0; +} +static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uval) +{ + struct snd_bebob *bebob = snd_kcontrol_chip(kctl); + unsigned int id, dig_in_fmt, dig_in_iface; + int err; + + id = uval->value.enumerated.item[0]; + + /* decode user value */ + dig_in_fmt = (id >> 1) & 0x01; + dig_in_iface = id & 0x01; + + err = special_clk_set_params(bebob, bebob->clk_src, dig_in_fmt, + bebob->dig_out_fmt, bebob->clk_lock); + if ((err < 0) || (bebob->dig_in_fmt > 0)) /* ADAT */ + goto end; + + err = avc_audio_set_selector(bebob->unit, 0x00, 0x04, dig_in_iface); + if (err < 0) + goto end; + + bebob->dig_in_iface = dig_in_iface; +end: + special_stream_formation_set(bebob); + return err; +} +static struct snd_kcontrol_new special_dig_in_iface_ctl = { + .name = "Digital Input Interface", + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = special_dig_in_iface_ctl_info, + .get = special_dig_in_iface_ctl_get, + .put = special_dig_in_iface_ctl_set +}; + +static int special_dig_out_iface_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *einf) +{ + einf->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + einf->count = 1; + einf->value.enumerated.items = ARRAY_SIZE(special_dig_iface_labels) - 1; + + if (einf->value.enumerated.item >= einf->value.enumerated.items) + einf->value.enumerated.item = einf->value.enumerated.items - 1; + + strcpy(einf->value.enumerated.name, + special_dig_iface_labels[einf->value.enumerated.item + 1]); + + return 0; +} +static int special_dig_out_iface_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uval) +{ + struct snd_bebob *bebob = snd_kcontrol_chip(kctl); + uval->value.enumerated.item[0] = bebob->dig_out_fmt; + return 0; +} +static int special_dig_out_iface_ctl_set(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *uval) +{ + struct snd_bebob *bebob = snd_kcontrol_chip(kctl); + unsigned int id; + int err; + + id = uval->value.enumerated.item[0]; + + err = special_clk_set_params(bebob, bebob->clk_src, bebob->dig_in_fmt, + id, bebob->clk_lock); + if (err >= 0) + special_stream_formation_set(bebob); + + return err; +} +static struct snd_kcontrol_new special_dig_out_iface_ctl = { + .name = "Digital Output Interface", + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = special_dig_out_iface_ctl_info, + .get = special_dig_out_iface_ctl_get, + .put = special_dig_out_iface_ctl_set +}; + +static int snd_bebob_maudio_special_add_controls(struct snd_bebob *bebob) +{ + struct snd_kcontrol *kctl; + int err; + + kctl = snd_ctl_new1(&special_clk_ctl, bebob); + err = snd_ctl_add(bebob->card, kctl); + if (err < 0) + goto end; + + kctl = snd_ctl_new1(&special_sync_ctl, bebob); + err = snd_ctl_add(bebob->card, kctl); + if (err < 0) + goto end; + bebob->ctl_id_sync = &kctl->id; + + kctl = snd_ctl_new1(&special_dig_in_iface_ctl, bebob); + err = snd_ctl_add(bebob->card, kctl); + if (err < 0) + goto end; + + kctl = snd_ctl_new1(&special_dig_out_iface_ctl, bebob); + err = snd_ctl_add(bebob->card, kctl); +end: + return err; +} + +/* Hardware metering for special firmware */ +static char *special_meter_labels[] = { + ANA_IN, ANA_IN, ANA_IN, ANA_IN, + SPDIF_IN, + ADAT_IN, ADAT_IN, ADAT_IN, ADAT_IN, + ANA_OUT, ANA_OUT, + SPDIF_OUT, + ADAT_OUT, ADAT_OUT, ADAT_OUT, ADAT_OUT, + HP_OUT, HP_OUT, + AUX_OUT +}; +static int +special_meter_get(struct snd_bebob *bebob, u32 *target, unsigned int size) +{ + u16 *buf; + unsigned int i, c, channels; + int err; + + channels = ARRAY_SIZE(special_meter_labels) * 2; + if (size < channels * sizeof(u32)) + return -EINVAL; + + /* omit last 4 bytes because it's clock info. */ + buf = kmalloc(METER_SIZE_SPECIAL - 4, GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + err = get_meter(bebob, (void *)buf, METER_SIZE_SPECIAL - 4); + if (err < 0) + goto end; + + /* some channels are not used, and format is u16 */ + i = 0; + for (c = 2; c < channels + 2; c++) + target[i++] = be16_to_cpu(buf[c]) << 16; +end: + kfree(buf); + return err; +} + +/* Firewire 410 specific operations */ static char *fw410_meter_labels[] = { ANA_IN, DIG_IN, ANA_OUT, ANA_OUT, ANA_OUT, ANA_OUT, DIG_OUT, @@ -230,6 +697,27 @@ end: return err; }
+/* for special customized devices */ +static struct snd_bebob_rate_spec special_rate_spec = { + .get = &special_get_rate, + .set = &special_set_rate, +}; +static struct snd_bebob_clock_spec special_clk_spec = { + .num = ARRAY_SIZE(special_clk_labels), + .labels = special_clk_labels, + .get = &special_clk_get, +}; +static struct snd_bebob_meter_spec special_meter_spec = { + .num = ARRAY_SIZE(special_meter_labels), + .labels = special_meter_labels, + .get = &special_meter_get +}; +struct snd_bebob_spec maudio_special_spec = { + .clock = &special_clk_spec, + .rate = &special_rate_spec, + .meter = &special_meter_spec +}; + /* Firewire 410 specification */ static struct snd_bebob_rate_spec usual_rate_spec = { .get = &snd_bebob_stream_get_rate, diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c index 5865fed..9a5bd58 100644 --- a/sound/firewire/bebob/bebob_stream.c +++ b/sound/firewire/bebob/bebob_stream.c @@ -361,9 +361,11 @@ start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream, conn = &bebob->out_conn;
/* channel mapping */ - err = map_stream(bebob, stream); - if (err < 0) - goto end; + if (!bebob->maudio_special_quirk) { + err = map_stream(bebob, stream); + if (err < 0) + goto end; + }
/* start amdtp stream */ err = amdtp_stream_start(stream, @@ -482,6 +484,20 @@ int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, goto end; }
+ /* + * NOTE: + * The firmware customized by M-Audio uses this cue to start + * transmit stream. This is not usual way. + */ + if (bebob->maudio_special_quirk) { + err = rate_spec->set(bebob, rate); + if (err < 0) { + amdtp_stream_stop(master); + break_both_connections(bebob); + goto end; + } + } + /* wait first callback */ if (!amdtp_stream_wait_callback(master)) { amdtp_stream_stop(master);