2 * bebob_stream.c - a part of driver for BeBoB based devices
4 * Copyright (c) 2013-2014 Takashi Sakamoto
6 * Licensed under the terms of the GNU General Public License, version 2.
11 #define CALLBACK_TIMEOUT 2000
12 #define FW_ISO_RESOURCE_DELAY 1000
16 * For BeBoB streams, Both of input and output CMP connection are important.
18 * For most devices, each CMP connection starts to transmit/receive a
19 * corresponding stream. But for a few devices, both of CMP connection needs
20 * to start transmitting stream. An example is 'M-Audio Firewire 410'.
23 /* 128 is an arbitrary length but it seems to be enough */
24 #define FORMAT_MAXIMUM_LENGTH 128
26 const unsigned int snd_bebob_rate_table
[SND_BEBOB_STRM_FMT_ENTRIES
] = {
37 * See: Table 51: Extended Stream Format Info ‘Sampling Frequency’
38 * in Additional AVC commands (Nov 2003, BridgeCo)
40 static const unsigned int bridgeco_freq_table
[] = {
51 get_formation_index(unsigned int rate
)
55 for (i
= 0; i
< ARRAY_SIZE(snd_bebob_rate_table
); i
++) {
56 if (snd_bebob_rate_table
[i
] == rate
)
63 snd_bebob_stream_get_rate(struct snd_bebob
*bebob
, unsigned int *curr_rate
)
65 unsigned int tx_rate
, rx_rate
, trials
;
70 err
= avc_general_get_sig_fmt(bebob
->unit
, &tx_rate
,
71 AVC_GENERAL_PLUG_DIR_OUT
, 0);
72 } while (err
== -EAGAIN
&& ++trials
< 3);
78 err
= avc_general_get_sig_fmt(bebob
->unit
, &rx_rate
,
79 AVC_GENERAL_PLUG_DIR_IN
, 0);
80 } while (err
== -EAGAIN
&& ++trials
< 3);
85 if (rx_rate
== tx_rate
)
88 /* synchronize receive stream rate to transmit stream rate */
89 err
= avc_general_set_sig_fmt(bebob
->unit
, rx_rate
,
90 AVC_GENERAL_PLUG_DIR_IN
, 0);
96 snd_bebob_stream_set_rate(struct snd_bebob
*bebob
, unsigned int rate
)
100 err
= avc_general_set_sig_fmt(bebob
->unit
, rate
,
101 AVC_GENERAL_PLUG_DIR_OUT
, 0);
105 err
= avc_general_set_sig_fmt(bebob
->unit
, rate
,
106 AVC_GENERAL_PLUG_DIR_IN
, 0);
111 * Some devices need a bit time for transition.
112 * 300msec is got by some experiments.
119 int snd_bebob_stream_get_clock_src(struct snd_bebob
*bebob
,
120 enum snd_bebob_clock_type
*src
)
122 struct snd_bebob_clock_spec
*clk_spec
= bebob
->spec
->clock
;
123 u8 addr
[AVC_BRIDGECO_ADDR_BYTES
], input
[7];
125 enum avc_bridgeco_plug_type type
;
128 /* 1.The device has its own operation to switch source of clock */
130 err
= clk_spec
->get(bebob
, &id
);
132 dev_err(&bebob
->unit
->device
,
133 "fail to get clock source: %d\n", err
);
137 if (id
>= clk_spec
->num
) {
138 dev_err(&bebob
->unit
->device
,
139 "clock source %d out of range 0..%d\n",
140 id
, clk_spec
->num
- 1);
145 *src
= clk_spec
->types
[id
];
150 * 2.The device don't support to switch source of clock then assumed
151 * to use internal clock always
153 if (bebob
->sync_input_plug
< 0) {
154 *src
= SND_BEBOB_CLOCK_TYPE_INTERNAL
;
159 * 3.The device supports to switch source of clock by an usual way.
160 * Let's check input for 'Music Sub Unit Sync Input' plug.
162 avc_bridgeco_fill_msu_addr(addr
, AVC_BRIDGECO_PLUG_DIR_IN
,
163 bebob
->sync_input_plug
);
164 err
= avc_bridgeco_get_plug_input(bebob
->unit
, addr
, input
);
166 dev_err(&bebob
->unit
->device
,
167 "fail to get an input for MSU in plug %d: %d\n",
168 bebob
->sync_input_plug
, err
);
173 * If there are no input plugs, all of fields are 0xff.
174 * Here check the first field. This field is used for direction.
176 if (input
[0] == 0xff) {
177 *src
= SND_BEBOB_CLOCK_TYPE_INTERNAL
;
181 /* The source from any output plugs is for one purpose only. */
182 if (input
[0] == AVC_BRIDGECO_PLUG_DIR_OUT
) {
184 * In BeBoB architecture, the source from music subunit may
185 * bypass from oPCR[0]. This means that this source gives
186 * synchronization to IEEE 1394 cycle start packet.
188 if (input
[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT
&&
190 *src
= SND_BEBOB_CLOCK_TYPE_INTERNAL
;
193 /* The source from any input units is for several purposes. */
194 } else if (input
[1] == AVC_BRIDGECO_PLUG_MODE_UNIT
) {
195 if (input
[2] == AVC_BRIDGECO_PLUG_UNIT_ISOC
) {
196 if (input
[3] == 0x00) {
198 * This source comes from iPCR[0]. This means
199 * that presentation timestamp calculated by
200 * SYT series of the received packets. In
201 * short, this driver is the master of
204 *src
= SND_BEBOB_CLOCK_TYPE_SYT
;
208 * This source comes from iPCR[1-29]. This
209 * means that the synchronization stream is not
210 * the Audio/MIDI compound stream.
212 *src
= SND_BEBOB_CLOCK_TYPE_EXTERNAL
;
215 } else if (input
[2] == AVC_BRIDGECO_PLUG_UNIT_EXT
) {
216 /* Check type of this plug. */
217 avc_bridgeco_fill_unit_addr(addr
,
218 AVC_BRIDGECO_PLUG_DIR_IN
,
219 AVC_BRIDGECO_PLUG_UNIT_EXT
,
221 err
= avc_bridgeco_get_plug_type(bebob
->unit
, addr
,
226 if (type
== AVC_BRIDGECO_PLUG_TYPE_DIG
) {
228 * SPDIF/ADAT or sometimes (not always) word
231 *src
= SND_BEBOB_CLOCK_TYPE_EXTERNAL
;
233 } else if (type
== AVC_BRIDGECO_PLUG_TYPE_SYNC
) {
234 /* Often word clock. */
235 *src
= SND_BEBOB_CLOCK_TYPE_EXTERNAL
;
237 } else if (type
== AVC_BRIDGECO_PLUG_TYPE_ADDITION
) {
240 * Mostly, additional internal clock.
242 *src
= SND_BEBOB_CLOCK_TYPE_INTERNAL
;
255 map_data_channels(struct snd_bebob
*bebob
, struct amdtp_stream
*s
)
257 unsigned int sec
, sections
, ch
, channels
;
258 unsigned int pcm
, midi
, location
;
259 unsigned int stm_pos
, sec_loc
, pos
;
260 u8
*buf
, addr
[AVC_BRIDGECO_ADDR_BYTES
], type
;
261 enum avc_bridgeco_plug_dir dir
;
265 * The length of return value of this command cannot be expected. Here
266 * use the maximum length of FCP.
268 buf
= kzalloc(256, GFP_KERNEL
);
272 if (s
== &bebob
->tx_stream
)
273 dir
= AVC_BRIDGECO_PLUG_DIR_OUT
;
275 dir
= AVC_BRIDGECO_PLUG_DIR_IN
;
277 avc_bridgeco_fill_unit_addr(addr
, dir
, AVC_BRIDGECO_PLUG_UNIT_ISOC
, 0);
278 err
= avc_bridgeco_get_plug_ch_pos(bebob
->unit
, addr
, buf
, 256);
280 dev_err(&bebob
->unit
->device
,
281 "fail to get channel position for isoc %s plug 0: %d\n",
282 (dir
== AVC_BRIDGECO_PLUG_DIR_IN
) ? "in" : "out",
288 /* positions in I/O buffer */
292 /* the number of sections in AMDTP packet */
293 sections
= buf
[pos
++];
295 for (sec
= 0; sec
< sections
; sec
++) {
296 /* type of this section */
297 avc_bridgeco_fill_unit_addr(addr
, dir
,
298 AVC_BRIDGECO_PLUG_UNIT_ISOC
, 0);
299 err
= avc_bridgeco_get_plug_section_type(bebob
->unit
, addr
,
302 dev_err(&bebob
->unit
->device
,
303 "fail to get section type for isoc %s plug 0: %d\n",
304 (dir
== AVC_BRIDGECO_PLUG_DIR_IN
) ? "in" :
315 /* the number of channels in this section */
316 channels
= buf
[pos
++];
318 for (ch
= 0; ch
< channels
; ch
++) {
319 /* position of this channel in AMDTP packet */
320 stm_pos
= buf
[pos
++] - 1;
321 /* location of this channel in this section */
322 sec_loc
= buf
[pos
++] - 1;
325 * Basically the number of location is within the
326 * number of channels in this section. But some models
327 * of M-Audio don't follow this. Its location for MIDI
328 * is the position of MIDI channels in AMDTP packet.
330 if (sec_loc
>= channels
)
334 /* for MIDI conformant data channel */
336 /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */
337 if ((midi
> 0) && (stm_pos
!= midi
)) {
341 s
->midi_position
= stm_pos
;
344 /* for PCM data channel */
345 case 0x01: /* Headphone */
346 case 0x02: /* Microphone */
347 case 0x03: /* Line */
348 case 0x04: /* SPDIF */
349 case 0x05: /* ADAT */
350 case 0x06: /* TDIF */
351 case 0x07: /* MADI */
352 /* for undefined/changeable signal */
353 case 0x08: /* Analog */
354 case 0x09: /* Digital */
356 location
= pcm
+ sec_loc
;
357 if (location
>= AMDTP_MAX_CHANNELS_FOR_PCM
) {
361 s
->pcm_positions
[location
] = stm_pos
;
377 init_both_connections(struct snd_bebob
*bebob
)
381 err
= cmp_connection_init(&bebob
->in_conn
,
382 bebob
->unit
, CMP_INPUT
, 0);
386 err
= cmp_connection_init(&bebob
->out_conn
,
387 bebob
->unit
, CMP_OUTPUT
, 0);
389 cmp_connection_destroy(&bebob
->in_conn
);
395 check_connection_used_by_others(struct snd_bebob
*bebob
, struct amdtp_stream
*s
)
397 struct cmp_connection
*conn
;
401 if (s
== &bebob
->tx_stream
)
402 conn
= &bebob
->out_conn
;
404 conn
= &bebob
->in_conn
;
406 err
= cmp_connection_check_used(conn
, &used
);
407 if ((err
>= 0) && used
&& !amdtp_stream_running(s
)) {
408 dev_err(&bebob
->unit
->device
,
409 "Connection established by others: %cPCR[%d]\n",
410 (conn
->direction
== CMP_OUTPUT
) ? 'o' : 'i',
419 make_both_connections(struct snd_bebob
*bebob
, unsigned int rate
)
421 int index
, pcm_channels
, midi_channels
, err
= 0;
423 if (bebob
->connected
)
426 /* confirm params for both streams */
427 index
= get_formation_index(rate
);
428 pcm_channels
= bebob
->tx_stream_formations
[index
].pcm
;
429 midi_channels
= bebob
->tx_stream_formations
[index
].midi
;
430 amdtp_stream_set_parameters(&bebob
->tx_stream
,
431 rate
, pcm_channels
, midi_channels
* 8);
432 pcm_channels
= bebob
->rx_stream_formations
[index
].pcm
;
433 midi_channels
= bebob
->rx_stream_formations
[index
].midi
;
434 amdtp_stream_set_parameters(&bebob
->rx_stream
,
435 rate
, pcm_channels
, midi_channels
* 8);
437 /* establish connections for both streams */
438 err
= cmp_connection_establish(&bebob
->out_conn
,
439 amdtp_stream_get_max_payload(&bebob
->tx_stream
));
442 err
= cmp_connection_establish(&bebob
->in_conn
,
443 amdtp_stream_get_max_payload(&bebob
->rx_stream
));
445 cmp_connection_break(&bebob
->out_conn
);
449 bebob
->connected
= true;
455 break_both_connections(struct snd_bebob
*bebob
)
457 cmp_connection_break(&bebob
->in_conn
);
458 cmp_connection_break(&bebob
->out_conn
);
460 bebob
->connected
= false;
462 /* These models seems to be in transition state for a longer time. */
463 if (bebob
->maudio_special_quirk
!= NULL
)
468 destroy_both_connections(struct snd_bebob
*bebob
)
470 cmp_connection_destroy(&bebob
->in_conn
);
471 cmp_connection_destroy(&bebob
->out_conn
);
475 get_sync_mode(struct snd_bebob
*bebob
, enum cip_flags
*sync_mode
)
477 enum snd_bebob_clock_type src
;
480 err
= snd_bebob_stream_get_clock_src(bebob
, &src
);
485 case SND_BEBOB_CLOCK_TYPE_INTERNAL
:
486 case SND_BEBOB_CLOCK_TYPE_EXTERNAL
:
487 *sync_mode
= CIP_SYNC_TO_DEVICE
;
490 case SND_BEBOB_CLOCK_TYPE_SYT
:
499 start_stream(struct snd_bebob
*bebob
, struct amdtp_stream
*stream
,
502 struct cmp_connection
*conn
;
505 if (stream
== &bebob
->rx_stream
)
506 conn
= &bebob
->in_conn
;
508 conn
= &bebob
->out_conn
;
510 /* channel mapping */
511 if (bebob
->maudio_special_quirk
== NULL
) {
512 err
= map_data_channels(bebob
, stream
);
517 /* start amdtp stream */
518 err
= amdtp_stream_start(stream
,
519 conn
->resources
.channel
,
525 int snd_bebob_stream_init_duplex(struct snd_bebob
*bebob
)
529 err
= init_both_connections(bebob
);
533 err
= amdtp_stream_init(&bebob
->tx_stream
, bebob
->unit
,
534 AMDTP_IN_STREAM
, CIP_BLOCKING
);
536 amdtp_stream_destroy(&bebob
->tx_stream
);
537 destroy_both_connections(bebob
);
540 /* See comments in next function */
541 init_completion(&bebob
->bus_reset
);
542 bebob
->tx_stream
.flags
|= CIP_SKIP_INIT_DBC_CHECK
;
545 * BeBoB v3 transfers packets with these qurks:
546 * - In the beginning of streaming, the value of dbc is incremented
547 * even if no data blocks are transferred.
548 * - The value of dbc is reset suddenly.
550 if (bebob
->version
> 2)
551 bebob
->tx_stream
.flags
|= CIP_EMPTY_HAS_WRONG_DBC
|
552 CIP_SKIP_DBC_ZERO_CHECK
;
555 * At high sampling rate, M-Audio special firmware transmits empty
556 * packet with the value of dbc incremented by 8 but the others are
557 * valid to IEC 61883-1.
559 if (bebob
->maudio_special_quirk
)
560 bebob
->tx_stream
.flags
|= CIP_EMPTY_HAS_WRONG_DBC
;
562 err
= amdtp_stream_init(&bebob
->rx_stream
, bebob
->unit
,
563 AMDTP_OUT_STREAM
, CIP_BLOCKING
);
565 amdtp_stream_destroy(&bebob
->tx_stream
);
566 amdtp_stream_destroy(&bebob
->rx_stream
);
567 destroy_both_connections(bebob
);
573 int snd_bebob_stream_start_duplex(struct snd_bebob
*bebob
, unsigned int rate
)
575 struct snd_bebob_rate_spec
*rate_spec
= bebob
->spec
->rate
;
576 struct amdtp_stream
*master
, *slave
;
577 enum cip_flags sync_mode
;
578 unsigned int curr_rate
;
579 bool updated
= false;
583 * Normal BeBoB firmware has a quirk at bus reset to transmits packets
584 * with discontinuous value in dbc field.
586 * This 'struct completion' is used to call .update() at first to update
587 * connections/streams. Next following codes handle streaming error.
589 if (amdtp_streaming_error(&bebob
->tx_stream
)) {
590 if (completion_done(&bebob
->bus_reset
))
591 reinit_completion(&bebob
->bus_reset
);
593 updated
= (wait_for_completion_interruptible_timeout(
595 msecs_to_jiffies(FW_ISO_RESOURCE_DELAY
)) > 0);
598 mutex_lock(&bebob
->mutex
);
600 /* Need no substreams */
601 if (atomic_read(&bebob
->substreams_counter
) == 0)
604 err
= get_sync_mode(bebob
, &sync_mode
);
607 if (sync_mode
== CIP_SYNC_TO_DEVICE
) {
608 master
= &bebob
->tx_stream
;
609 slave
= &bebob
->rx_stream
;
611 master
= &bebob
->rx_stream
;
612 slave
= &bebob
->tx_stream
;
616 * Considering JACK/FFADO streaming:
617 * TODO: This can be removed hwdep functionality becomes popular.
619 err
= check_connection_used_by_others(bebob
, master
);
624 * packet queueing error or detecting discontinuity
626 * At bus reset, connections should not be broken here. So streams need
627 * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
629 if (amdtp_streaming_error(master
))
630 amdtp_stream_stop(master
);
631 if (amdtp_streaming_error(slave
))
632 amdtp_stream_stop(slave
);
634 !amdtp_stream_running(master
) && !amdtp_stream_running(slave
))
635 break_both_connections(bebob
);
637 /* stop streams if rate is different */
638 err
= rate_spec
->get(bebob
, &curr_rate
);
640 dev_err(&bebob
->unit
->device
,
641 "fail to get sampling rate: %d\n", err
);
646 if (rate
!= curr_rate
) {
647 amdtp_stream_stop(master
);
648 amdtp_stream_stop(slave
);
649 break_both_connections(bebob
);
652 /* master should be always running */
653 if (!amdtp_stream_running(master
)) {
654 amdtp_stream_set_sync(sync_mode
, master
, slave
);
655 bebob
->master
= master
;
659 * If establishing connections at first, Yamaha GO46
660 * (and maybe Terratec X24) don't generate sound.
662 * For firmware customized by M-Audio, refer to next NOTE.
664 if (bebob
->maudio_special_quirk
== NULL
) {
665 err
= rate_spec
->set(bebob
, rate
);
667 dev_err(&bebob
->unit
->device
,
668 "fail to set sampling rate: %d\n",
674 err
= make_both_connections(bebob
, rate
);
678 err
= start_stream(bebob
, master
, rate
);
680 dev_err(&bebob
->unit
->device
,
681 "fail to run AMDTP master stream:%d\n", err
);
682 break_both_connections(bebob
);
688 * The firmware customized by M-Audio uses these commands to
689 * start transmitting stream. This is not usual way.
691 if (bebob
->maudio_special_quirk
!= NULL
) {
692 err
= rate_spec
->set(bebob
, rate
);
694 dev_err(&bebob
->unit
->device
,
695 "fail to ensure sampling rate: %d\n",
697 amdtp_stream_stop(master
);
698 break_both_connections(bebob
);
703 /* wait first callback */
704 if (!amdtp_stream_wait_callback(master
, CALLBACK_TIMEOUT
)) {
705 amdtp_stream_stop(master
);
706 break_both_connections(bebob
);
712 /* start slave if needed */
713 if (!amdtp_stream_running(slave
)) {
714 err
= start_stream(bebob
, slave
, rate
);
716 dev_err(&bebob
->unit
->device
,
717 "fail to run AMDTP slave stream:%d\n", err
);
718 amdtp_stream_stop(master
);
719 break_both_connections(bebob
);
723 /* wait first callback */
724 if (!amdtp_stream_wait_callback(slave
, CALLBACK_TIMEOUT
)) {
725 amdtp_stream_stop(slave
);
726 amdtp_stream_stop(master
);
727 break_both_connections(bebob
);
732 mutex_unlock(&bebob
->mutex
);
736 void snd_bebob_stream_stop_duplex(struct snd_bebob
*bebob
)
738 struct amdtp_stream
*master
, *slave
;
740 if (bebob
->master
== &bebob
->rx_stream
) {
741 slave
= &bebob
->tx_stream
;
742 master
= &bebob
->rx_stream
;
744 slave
= &bebob
->rx_stream
;
745 master
= &bebob
->tx_stream
;
748 mutex_lock(&bebob
->mutex
);
750 if (atomic_read(&bebob
->substreams_counter
) == 0) {
751 amdtp_stream_pcm_abort(master
);
752 amdtp_stream_stop(master
);
754 amdtp_stream_pcm_abort(slave
);
755 amdtp_stream_stop(slave
);
757 break_both_connections(bebob
);
760 mutex_unlock(&bebob
->mutex
);
763 void snd_bebob_stream_update_duplex(struct snd_bebob
*bebob
)
765 /* vs. XRUN recovery due to discontinuity at bus reset */
766 mutex_lock(&bebob
->mutex
);
768 if ((cmp_connection_update(&bebob
->in_conn
) < 0) ||
769 (cmp_connection_update(&bebob
->out_conn
) < 0)) {
770 amdtp_stream_pcm_abort(&bebob
->rx_stream
);
771 amdtp_stream_pcm_abort(&bebob
->tx_stream
);
772 amdtp_stream_stop(&bebob
->rx_stream
);
773 amdtp_stream_stop(&bebob
->tx_stream
);
774 break_both_connections(bebob
);
776 amdtp_stream_update(&bebob
->rx_stream
);
777 amdtp_stream_update(&bebob
->tx_stream
);
780 /* wake up stream_start_duplex() */
781 if (!completion_done(&bebob
->bus_reset
))
782 complete_all(&bebob
->bus_reset
);
784 mutex_unlock(&bebob
->mutex
);
788 * This function should be called before starting streams or after stopping
791 void snd_bebob_stream_destroy_duplex(struct snd_bebob
*bebob
)
793 amdtp_stream_destroy(&bebob
->rx_stream
);
794 amdtp_stream_destroy(&bebob
->tx_stream
);
796 destroy_both_connections(bebob
);
800 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’
801 * in Additional AVC commands (Nov 2003, BridgeCo)
802 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005
805 parse_stream_formation(u8
*buf
, unsigned int len
,
806 struct snd_bebob_stream_formation
*formation
)
808 unsigned int i
, e
, channels
, format
;
811 * this module can support a hierarchy combination that:
812 * Root: Audio and Music (0x90)
813 * Level 1: AM824 Compound (0x40)
815 if ((buf
[0] != 0x90) || (buf
[1] != 0x40))
818 /* check sampling rate */
819 for (i
= 0; i
< ARRAY_SIZE(bridgeco_freq_table
); i
++) {
820 if (buf
[2] == bridgeco_freq_table
[i
])
823 if (i
== ARRAY_SIZE(bridgeco_freq_table
))
826 /* Avoid double count by different entries for the same rate. */
827 memset(&formation
[i
], 0, sizeof(struct snd_bebob_stream_formation
));
829 for (e
= 0; e
< buf
[4]; e
++) {
830 channels
= buf
[5 + e
* 2];
831 format
= buf
[6 + e
* 2];
834 /* IEC 60958 Conformant, currently handled as MBLA */
836 /* Multi bit linear audio */
838 formation
[i
].pcm
+= channels
;
840 /* MIDI Conformant */
842 formation
[i
].midi
+= channels
;
844 /* IEC 61937-3 to 7 */
850 /* Multi bit linear audio */
851 case 0x07: /* DVD-Audio */
852 case 0x0c: /* High Precision */
854 case 0x08: /* (Plain) Raw */
855 case 0x09: /* (Plain) SACD */
856 case 0x0a: /* (Encoded) Raw */
857 case 0x0b: /* (Encoded) SACD */
858 /* Synchronization Stream (Stereo Raw audio) */
863 return -ENOSYS
; /* not supported */
867 if (formation
[i
].pcm
> AMDTP_MAX_CHANNELS_FOR_PCM
||
868 formation
[i
].midi
> AMDTP_MAX_CHANNELS_FOR_MIDI
)
875 fill_stream_formations(struct snd_bebob
*bebob
, enum avc_bridgeco_plug_dir dir
,
879 struct snd_bebob_stream_formation
*formations
;
880 unsigned int len
, eid
;
881 u8 addr
[AVC_BRIDGECO_ADDR_BYTES
];
884 buf
= kmalloc(FORMAT_MAXIMUM_LENGTH
, GFP_KERNEL
);
888 if (dir
== AVC_BRIDGECO_PLUG_DIR_IN
)
889 formations
= bebob
->rx_stream_formations
;
891 formations
= bebob
->tx_stream_formations
;
893 for (eid
= 0; eid
< SND_BEBOB_STRM_FMT_ENTRIES
; eid
++) {
894 len
= FORMAT_MAXIMUM_LENGTH
;
895 avc_bridgeco_fill_unit_addr(addr
, dir
,
896 AVC_BRIDGECO_PLUG_UNIT_ISOC
, pid
);
897 err
= avc_bridgeco_get_plug_strm_fmt(bebob
->unit
, addr
, buf
,
899 /* No entries remained. */
900 if (err
== -EINVAL
&& eid
> 0) {
903 } else if (err
< 0) {
904 dev_err(&bebob
->unit
->device
,
905 "fail to get stream format %d for isoc %s plug %d:%d\n",
907 (dir
== AVC_BRIDGECO_PLUG_DIR_IN
) ? "in" :
913 err
= parse_stream_formation(buf
, len
, formations
);
923 seek_msu_sync_input_plug(struct snd_bebob
*bebob
)
925 u8 plugs
[AVC_PLUG_INFO_BUF_BYTES
], addr
[AVC_BRIDGECO_ADDR_BYTES
];
927 enum avc_bridgeco_plug_type type
;
930 /* Get the number of Music Sub Unit for both direction. */
931 err
= avc_general_get_plug_info(bebob
->unit
, 0x0c, 0x00, 0x00, plugs
);
933 dev_err(&bebob
->unit
->device
,
934 "fail to get info for MSU in/out plugs: %d\n",
939 /* seek destination plugs for 'MSU sync input' */
940 bebob
->sync_input_plug
= -1;
941 for (i
= 0; i
< plugs
[0]; i
++) {
942 avc_bridgeco_fill_msu_addr(addr
, AVC_BRIDGECO_PLUG_DIR_IN
, i
);
943 err
= avc_bridgeco_get_plug_type(bebob
->unit
, addr
, &type
);
945 dev_err(&bebob
->unit
->device
,
946 "fail to get type for MSU in plug %d: %d\n",
951 if (type
== AVC_BRIDGECO_PLUG_TYPE_SYNC
) {
952 bebob
->sync_input_plug
= i
;
960 int snd_bebob_stream_discover(struct snd_bebob
*bebob
)
962 struct snd_bebob_clock_spec
*clk_spec
= bebob
->spec
->clock
;
963 u8 plugs
[AVC_PLUG_INFO_BUF_BYTES
], addr
[AVC_BRIDGECO_ADDR_BYTES
];
964 enum avc_bridgeco_plug_type type
;
968 /* the number of plugs for isoc in/out, ext in/out */
969 err
= avc_general_get_plug_info(bebob
->unit
, 0x1f, 0x07, 0x00, plugs
);
971 dev_err(&bebob
->unit
->device
,
972 "fail to get info for isoc/external in/out plugs: %d\n",
978 * This module supports at least one isoc input plug and one isoc
981 if ((plugs
[0] == 0) || (plugs
[1] == 0)) {
986 avc_bridgeco_fill_unit_addr(addr
, AVC_BRIDGECO_PLUG_DIR_IN
,
987 AVC_BRIDGECO_PLUG_UNIT_ISOC
, 0);
988 err
= avc_bridgeco_get_plug_type(bebob
->unit
, addr
, &type
);
990 dev_err(&bebob
->unit
->device
,
991 "fail to get type for isoc in plug 0: %d\n", err
);
993 } else if (type
!= AVC_BRIDGECO_PLUG_TYPE_ISOC
) {
997 err
= fill_stream_formations(bebob
, AVC_BRIDGECO_PLUG_DIR_IN
, 0);
1001 avc_bridgeco_fill_unit_addr(addr
, AVC_BRIDGECO_PLUG_DIR_OUT
,
1002 AVC_BRIDGECO_PLUG_UNIT_ISOC
, 0);
1003 err
= avc_bridgeco_get_plug_type(bebob
->unit
, addr
, &type
);
1005 dev_err(&bebob
->unit
->device
,
1006 "fail to get type for isoc out plug 0: %d\n", err
);
1008 } else if (type
!= AVC_BRIDGECO_PLUG_TYPE_ISOC
) {
1012 err
= fill_stream_formations(bebob
, AVC_BRIDGECO_PLUG_DIR_OUT
, 0);
1016 /* count external input plugs for MIDI */
1017 bebob
->midi_input_ports
= 0;
1018 for (i
= 0; i
< plugs
[2]; i
++) {
1019 avc_bridgeco_fill_unit_addr(addr
, AVC_BRIDGECO_PLUG_DIR_IN
,
1020 AVC_BRIDGECO_PLUG_UNIT_EXT
, i
);
1021 err
= avc_bridgeco_get_plug_type(bebob
->unit
, addr
, &type
);
1023 dev_err(&bebob
->unit
->device
,
1024 "fail to get type for external in plug %d: %d\n",
1027 } else if (type
== AVC_BRIDGECO_PLUG_TYPE_MIDI
) {
1028 bebob
->midi_input_ports
++;
1032 /* count external output plugs for MIDI */
1033 bebob
->midi_output_ports
= 0;
1034 for (i
= 0; i
< plugs
[3]; i
++) {
1035 avc_bridgeco_fill_unit_addr(addr
, AVC_BRIDGECO_PLUG_DIR_OUT
,
1036 AVC_BRIDGECO_PLUG_UNIT_EXT
, i
);
1037 err
= avc_bridgeco_get_plug_type(bebob
->unit
, addr
, &type
);
1039 dev_err(&bebob
->unit
->device
,
1040 "fail to get type for external out plug %d: %d\n",
1043 } else if (type
== AVC_BRIDGECO_PLUG_TYPE_MIDI
) {
1044 bebob
->midi_output_ports
++;
1048 /* for check source of clock later */
1050 err
= seek_msu_sync_input_plug(bebob
);
1055 void snd_bebob_stream_lock_changed(struct snd_bebob
*bebob
)
1057 bebob
->dev_lock_changed
= true;
1058 wake_up(&bebob
->hwdep_wait
);
1061 int snd_bebob_stream_lock_try(struct snd_bebob
*bebob
)
1065 spin_lock_irq(&bebob
->lock
);
1067 /* user land lock this */
1068 if (bebob
->dev_lock_count
< 0) {
1073 /* this is the first time */
1074 if (bebob
->dev_lock_count
++ == 0)
1075 snd_bebob_stream_lock_changed(bebob
);
1078 spin_unlock_irq(&bebob
->lock
);
1082 void snd_bebob_stream_lock_release(struct snd_bebob
*bebob
)
1084 spin_lock_irq(&bebob
->lock
);
1086 if (WARN_ON(bebob
->dev_lock_count
<= 0))
1088 if (--bebob
->dev_lock_count
== 0)
1089 snd_bebob_stream_lock_changed(bebob
);
1091 spin_unlock_irq(&bebob
->lock
);