ALSA: bebob: Add support for M-Audio special Firewire series
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 a model specific member to 'struct
snd_bebob' and some model specific functions. Some parameters are write-only so
this commit also adds control interface for applications to set 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.
- After booting up, they often fail to send response against driver's request
due to mismatch of gap_count.
This module don't support to upload firmware.
Tested-by: Darren Anderson <darrena092@gmail.com> (ProjectMix I/O)
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c
index 5fc5270..2695b78 100644
--- a/sound/firewire/bebob/bebob_stream.c
+++ b/sound/firewire/bebob/bebob_stream.c
@@ -389,6 +389,10 @@
cmp_connection_break(&bebob->out_conn);
bebob->connected = false;
+
+ /* These models seems to be in transition state for a longer time. */
+ if (bebob->maudio_special_quirk != NULL)
+ msleep(200);
}
static void
@@ -421,9 +425,11 @@
conn = &bebob->out_conn;
/* channel mapping */
- err = map_data_channels(bebob, stream);
- if (err < 0)
- goto end;
+ if (bebob->maudio_special_quirk == NULL) {
+ err = map_data_channels(bebob, stream);
+ if (err < 0)
+ goto end;
+ }
/* start amdtp stream */
err = amdtp_stream_start(stream,
@@ -555,13 +561,17 @@
* NOTE:
* If establishing connections at first, Yamaha GO46
* (and maybe Terratec X24) don't generate sound.
+ *
+ * For firmware customized by M-Audio, refer to next NOTE.
*/
- err = rate_spec->set(bebob, rate);
- if (err < 0) {
- dev_err(&bebob->unit->device,
- "fail to set sampling rate: %d\n",
- err);
- goto end;
+ if (bebob->maudio_special_quirk == NULL) {
+ err = rate_spec->set(bebob, rate);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to set sampling rate: %d\n",
+ err);
+ goto end;
+ }
}
err = make_both_connections(bebob, rate);
@@ -576,6 +586,23 @@
goto end;
}
+ /*
+ * NOTE:
+ * The firmware customized by M-Audio uses these commands to
+ * start transmitting stream. This is not usual way.
+ */
+ if (bebob->maudio_special_quirk != NULL) {
+ err = rate_spec->set(bebob, rate);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to ensure sampling rate: %d\n",
+ err);
+ amdtp_stream_stop(master);
+ break_both_connections(bebob);
+ goto end;
+ }
+ }
+
/* wait first callback */
if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) {
amdtp_stream_stop(master);