02 Mar, 2017
1 commit
-
…hed.h> into <linux/sched/signal.h>
Fix up affected files that include this signal functionality via sched.h.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
26 Jan, 2017
1 commit
14 Jan, 2017
1 commit
-
Some identifiers are referred just by one functions. In this case, they
can be put into the function definition. This brings two merits; readers
can easily follow codes related to the identifiers, developers are free
from name conflict.This commit moves such identifiers to each function definition.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
12 Jan, 2017
1 commit
-
Now snd_rawmidi_ops is maintained as a const pointer in snd_rawmidi,
we can constify the definitions.Reviewed-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
05 Jan, 2017
7 commits
-
Some identifiers are referred just by one functions. In this case, they
can be put into the function definition. This brings two merits; readers
can easily follow codes related to the identifiers, developers are free
from name conflict.This commit moves such identifiers to each function definition.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
Some identifiers are referred just by one functions. In this case, they
can be put into the function definition. This brings two merits; readers
can easily follow codes related to the identifiers, developers are free
from name conflict.This commit moves such identifiers to each function definition.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
Some identifiers are referred just by one functions. In this case, they
can be put into the function definition. This brings two merits; readers
can easily follow codes related to the identifiers, developers are free
from name conflict.This commit moves such identifiers to each function definition.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
Some identifiers are referred just by one functions. In this case, they
can be put into the function definition. This brings two merits; readers
can easily follow codes related to the identifiers, developers are free
from name conflict.This commit moves such identifiers to each function definition.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
Some identifiers are referred just by one functions. In this case, they
can be put into the function definition. This brings two merits; readers
can easily follow codes related to the identifiers, developers are free
from name conflict.This commit moves such identifiers to each function definition.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
Some identifiers are referred just by one functions. In this case, they
can be put into the function definition. This brings two merits; readers
can easily follow codes related to the identifiers, developers are free
from name conflict.This commit moves such identifiers to each function definition.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
This reverts commit 6b7e95d1336b9eb0d4c6db190ce756480496bd13. This commit
is based on a concern about value of the given parameter. It's expected
to be ORed value with some enumeration-constants, thus often it can not be
one of the enumeration-constants. I understood that this is out of
specification and causes implementation-dependent issues.In C language specification, enumerated type can be interpreted as an
integer type, in which all of enumeration-constants in corresponding
enumerator-list can be stored. Implementations can select one of char,
signed int and unsigned int as its type, and this selection is
implementation-dependent.In GCC, a signed integer is selected when at least one of
enumeration-constants has negative value, else an unsigned integer is
selected. This behaviour can be switched by -fshort-enums to short type.
Anyway, the type can be decided after scanning all of
enumeration-constants.Totally, there's no rules to constrain the value of enumerated type to
be one of enumeration-constants. In short, in enumerated type, decision
of actual type for the type is the most important and
enumeration-constants are just used for the decision, thus it's permitted
to have an integer value in a range of enumeration-constants. In our case,
actual type for the type is currently deterministic to be either char or
unsigned int. Under GCC, it's unsigned int.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
03 Jan, 2017
6 commits
-
As of kernel 4.10, ALSA dice driver is expected to be used in default
speed. In most cases, it's S400. While, IEEE 1394 specification describes
the other speed such as S800.According to 'TCD30XX User Guide', its link layer controller supports
several transmission speed up to S800[0]. In Dice software interface,
transmission speed in output direction can be configured by asynchronous
transaction to 'TX_SPEED' offset in its address space. S800 may be
available.This commit improves configuration of transmission unit before starting
packet streaming for this purpose. The value of 'max_speed' in 'fw_device'
data structure has available maximum speed decided in bus arbitration,
thus it's within capacity of the unit.[0] TCD3xx User Guide - TCAT 1394 LLC, Revision 0.9.0-41360 (TC Applied Technologies, May 6 2015)
http://www.tctechnologies.tc/index.php/support/support-hardware/dice-iii-detailed-documentationSigned-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
The 'amdtp_stream' structure is initialized by a call of
'amdtp_stream_init()'. Although a parameter of this function is for bit
flags of packet attributes, its type is enumerator.This commit changes the type so that it's proper for a bit flags.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
This module has a bug not to return error code in a case that data
structure for transmitted packets fails to be initialized.This commit fixes the bug.
Fixes: 35efa5c489de ("ALSA: firewire-tascam: add streaming functionality")
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
ALSA fireworks driver has a bug not to call an API to destroy
'cmp_connection' structure for input direction. Currently this causes no
issues because it just destroys 'mutex' structure, while it's better to
fix it for future work.Fix: d23c2cc4485d ("ALSA: fireworks/bebob/dice/oxfw: allow stream destructor after releasing runtime")
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
As of kernel 4.10, ALSA OXFW driver has no entry for Onyx 1640i produced
by Mackie (Loud Technologies). This commit supplement it.I note that there're two models produced by Mackie (Loud Technologies),
which have the same name 'Onyx 1640i'. The former model based on OXFW970,
the latter model based on Dice. This is probably due to low quality of
communication of OXFW series.Additionally, the tester reports his or her experiences to get unexpected
result at higher sampling transmission frequency as 88.2/96.0 kHz. We
didn't have further investigation yet[0].$ ./linux-firewire-utils/src/crpp < config_rom
ROM header and bus information block
-----------------------------------------------------------------
400 042525ce bus_info_length 4, crc_length 37, crc 9678
404 31333934 bus_name "1394"
408 20ff5003 irmc 0, cmc 0, isc 1, bmc 0, cyc_clk_acc 255, max_rec 5 (64)
40c 000ff205 company_id 000ff2 |
410 00000fcf device_id 0500000fcf | EUI-64 000ff20500000fcfroot directory
-----------------------------------------------------------------
414 0006c1b7 directory_length 6, crc 49591
418 03000ff2 vendor
41c 8100000a --> descriptor leaf at 444
420 17001640 model
424 81000011 --> descriptor leaf at 468
428 0c0083c0 node capabilities per IEEE 1394
42c d1000001 --> unit directory at 430unit directory at 430
-----------------------------------------------------------------
430 00040b97 directory_length 4, crc 2967
434 1200a02d specifier id: 1394 TA
438 13010001 version: AV/C
43c 17001640 model
440 81000010 --> descriptor leaf at 480descriptor leaf at 444
-----------------------------------------------------------------
444 0008a886 leaf_length 8, crc 43142
448 00000000 textual descriptor
44c 00000000 minimal ASCII
450 4c6f7564 "Loud"
454 20546563 " Tec"
458 686e6f6c "hnol"
45c 6f676965 "ogie"
460 7320496e "s In"
464 632e0000 "c."descriptor leaf at 468
-----------------------------------------------------------------
468 00059fcf leaf_length 5, crc 40911
46c 00000000 textual descriptor
470 00000000 minimal ASCII
474 4f6e7978 "Onyx"
478 20313634 " 164"
47c 30690000 "0i"descriptor leaf at 480
-----------------------------------------------------------------
480 00059fcf leaf_length 5, crc 40911
484 00000000 textual descriptor
488 00000000 minimal ASCII
48c 4f6e7978 "Onyx"
490 20313634 " 164"
494 30690000 "0i"[0]: [FFADO-user] Mackie 1640i issues (finer details)
https://sourceforge.net/p/ffado/mailman/message/35229260/Tested-by: Seth O'Bannion
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
26 Dec, 2016
1 commit
-
ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.Signed-off-by: Thomas Gleixner
Cc: Peter Zijlstra
18 Nov, 2016
1 commit
-
A modalias of 'ieee1394:ven00000D6Cmo00010060sp' hits units for M-Audio
FireWire Audiophile only. However the unit has two states relevant to
loaded firmware. Initial firmware returns 'FW Audiophile Bootloader',
while functional firmware returns 'FW Audiophile'.ALSA bebob driver compares the units' model name to strings of 24 characters
by the first 15 characters. This is shorter way to differentiate these two
states but confusing to readers.This commit improves the code for this point. Kernel stack is consumed more in
call of check_audiophile_booted() by a bit.With initial firmware:
$ ./linux-firewire-utils/src/crpp < /sys/bus/firewire/devices/fw1/config_rom
ROM header and bus information block
-----------------------------------------------------------------
400 04276da6 bus_info_length 4, crc_length 39, crc 28070
404 31333934 bus_name "1394"
408 006481f2 irmc 0, cmc 0, isc 0, bmc 0, pmc 0, cyc_clk_acc 100,
max_rec 8 (512), max_rom 1, gen 15, spd 2 (S400)
40c 000d6c03 company_id 000d6c |
410 102b7e2e device_id 03102b7e2e | EUI-64 000d6c03102b7e2eroot directory
-----------------------------------------------------------------
414 00067414 directory_length 6, crc 29716
418 0c0083c0 node capabilities per IEEE 1394
41c 03000d6c vendor
420 81000009 --> descriptor leaf at 444
424 17010060 model
428 8100000c --> descriptor leaf at 458
42c d1000001 --> unit directory at 430unit directory at 430
-----------------------------------------------------------------
430 00049da1 directory_length 4, crc 40353 (should be 48611)
434 1200a02d specifier id: 1394 TA
438 13014001 version: Vender Unique and AV/C
43c 17010060 model
440 8100000f --> descriptor leaf at 47cdescriptor leaf at 444
-----------------------------------------------------------------
444 0004073e leaf_length 4, crc 1854
448 00000000 textual descriptor
44c 00000000 minimal ASCII
450 4d2d4155 "M-AU"
454 44494f00 "DIO"descriptor leaf at 458
-----------------------------------------------------------------
458 00086f21 leaf_length 8, crc 28449
45c 00000000 textual descriptor
460 00000000 minimal ASCII
464 46572041 "FW A"
468 7564696f "udio"
46c 7068696c "phil"
470 6520426f "e Bo"
474 6f746c6f "otlo"
478 61646572 "ader"descriptor leaf at 47c
-----------------------------------------------------------------
47c 00086f21 leaf_length 8, crc 28449
480 00000000 textual descriptor
484 00000000 minimal ASCII
488 46572041 "FW A"
48c 7564696f "udio"
490 7068696c "phil"
494 6520426f "e Bo"
498 6f746c6f "otlo"
49c 61646572 "ader"With functional firmware:
$ ./linux-firewire-utils/src/crpp < /sys/bus/firewire/devices/fw1/config_rom
ROM header and bus information block
-----------------------------------------------------------------
400 042de16f bus_info_length 4, crc_length 45, crc 57711
404 31333934 bus_name "1394"
408 f0648122 irmc 1, cmc 1, isc 1, bmc 1, pmc 0, cyc_clk_acc 100,
max_rec 8 (512), max_rom 1, gen 2, spd 2 (S400)
40c 000d6c03 company_id 000d6c |
410 002b7e2e device_id 03002b7e2e | EUI-64 000d6c03002b7e2eroot directory
-----------------------------------------------------------------
414 0009dac4 directory_length 9, crc 56004
418 0400000d hardware version
41c 0c0083c0 node capabilities per IEEE 1394
420 03000d6c vendor
424 81000012 --> descriptor leaf at 46c
428 17010060 model
42c 81000015 --> descriptor leaf at 480
430 13ffffff version
434 d1000002 --> unit directory at 43c
438 d4000006 --> dependent info directory at 450unit directory at 43c
-----------------------------------------------------------------
43c 00041eb9 directory_length 4, crc 7865
440 1200a02d specifier id: 1394 TA
444 13014001 version: Vender Unique and AV/C
448 17010060 model
44c 81000014 --> descriptor leaf at 49cdependent info directory at 450
-----------------------------------------------------------------
450 000637c7 directory_length 6, crc 14279
454 120007f5 specifier id
458 13000001 version
45c 3affffc7 (immediate value)
460 3b100000 (immediate value)
464 3cffffc7 (immediate value)
468 3d600000 (immediate value)descriptor leaf at 46c
-----------------------------------------------------------------
46c 0004b8e4 leaf_length 4, crc 47332
470 00000000 textual descriptor
474 00000000 minimal ASCII
478 4d2d4175 "M-Au"
47c 64696f00 "dio"descriptor leaf at 480
-----------------------------------------------------------------
480 0006194b leaf_length 6, crc 6475
484 00000000 textual descriptor
488 00000000 minimal ASCII
48c 46572041 "FW A"
490 7564696f "udio"
494 7068696c "phil"
498 65000000 "e"descriptor leaf at 49c
-----------------------------------------------------------------
49c 0006194b leaf_length 6, crc 6475
4a0 00000000 textual descriptor
4a4 00000000 minimal ASCII
4a8 46572041 "FW A"
4ac 7564696f "udio"
4b0 7068696c "phil"
4b4 65000000 "e"Reported-by: Nicolas Iooss
Reported-by: Joe Perches
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
11 Sep, 2016
1 commit
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Back-merge from for-linus just to make the further development easier.
02 Sep, 2016
1 commit
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Check for snd_pcm_ops structures that are only stored in the ops field of a
snd_soc_platform_driver structure or passed as the third argument to
snd_pcm_set_ops. The corresponding field or parameter is declared const,
so snd_pcm_ops structures that have this property can be declared as const
also.The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)//
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct snd_pcm_ops i@p = { ... };@ok1@
identifier r.i;
struct snd_soc_platform_driver e;
position p;
@@
e.ops = &i@p;@ok2@
identifier r.i;
expression e1, e2;
position p;
@@
snd_pcm_set_ops(e1, e2, &i@p)@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
struct snd_pcm_ops e;
@@
e@i@p@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct snd_pcm_ops i = { ... };
//Signed-off-by: Julia Lawall
Reviewed-by: Takashi Sakamoto
Acked-by: Clemens Ladisch
Signed-off-by: Takashi Iwai
31 Aug, 2016
2 commits
-
In hwdep interface of fireworks driver, accessing to user space is in a
critical section with disabled local interrupt. Depending on architecture,
accessing to user space can cause page fault exception. Then local
processor stores machine status and handles the synchronous event. A
handler corresponding to the event can call task scheduler to wait for
preparing pages. In a case of usage of single core processor, the state to
disable local interrupt is worse because it don't handle usual interrupts
from hardware.This commit fixes this bug, performing the accessing outside spinlock. This
commit also gives up counting the number of queued response messages to
simplify ring-buffer management.Reported-by: Vaishali Thakkar
Cc: stable@vger.kernel.org
Fixes: 555e8a8f7f14('ALSA: fireworks: Add command/response functionality into hwdep interface')
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
In hwdep interface of firewire-tascam driver, accessing to user space is
in a critical section with disabled local interrupt. Depending on
architecture, accessing to user space can cause page fault exception. Then
local processor stores machine status and handle the synchronous event. A
handler corresponding to the event can call task scheduler to wait for
preparing pages. In a case of usage of single core processor, the state to
disable local interrupt is worse because it doesn't handle usual interrupts
from hardware.This commit fixes this bug, by performing the accessing outside spinlock.
Reported-by: Vaishali Thakkar
Cc: stable@vger.kernel.org
Fixes: e5e0c3dd257b('ALSA: firewire-tascam: add hwdep interface')
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
24 Aug, 2016
2 commits
-
The below models were developed with a cooperation by Yamaha and Terratec.
- Yamaha GO 44/Terratec PHASE 24 FW
- Yamaha GO 46/Terratec PHASE X24 FWThey have the same configurations, thus it's better to unify corresponding
codes.This commit merges them to reduce the amount of maintained codes.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
Once Yamaha and Terratec cooperated to develop some audio and music units
on IEEE 1394 bus. On these models, the same embedded board is used, and
similar configurations are also applied.This commit renames file for Yamaha's configuration so that it's for both
of Yamaha and Terratec.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
18 May, 2016
1 commit
-
Commit a9c4284bf5a9 ("ALSA: firewire-lib: add context information to
tracepoints") adds new members to tracepoint events of this module, to
represent context information. One of the members is bool type and
this causes sparse warnings.16:1: warning: expression using sizeof bool
60:1: warning: expression using sizeof bool
16:1: warning: odd constant _Bool cast (ffffffffffffffff becomes 1)
60:1: warning: odd constant _Bool cast (ffffffffffffffff becomes 1)This commit suppresses the warnings, by changing type of the member
to 'unsigned int'. Additionally, this commit applies '!!' idiom to
get 0/1 from 'in_interrupt()'.Fixes: a9c4284bf5a9 ("ALSA: firewire-lib: add context information to tracepoints")
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
12 May, 2016
3 commits
-
On most of audio and music units on IEEE 1394 bus which ALSA firewire stack
supports (or plans to support), CIP with two quadlets header is used.
Thus, there's no cases to queue packets with blank payload. If such packets
are going to be queued, it means that they're for skips of the cycle.This commit simplifies helper functions to queue a packet.
Signed-off-by: Takashi Sakamoto
Acked-by: Clemens Ladisch
Signed-off-by: Takashi Iwai -
In current implementation, packet processing is done in both of software
IRQ contexts of IR/IT contexts and process contexts.This is usual interrupt handling of IR/IT context for 1394 OHCI.
(in hardware IRQ context)
irq_handler() (drivers/firewire/ohci.c)
->tasklet_schedule()
(in software IRQ context)
handle_it_packet() or handle_ir_packet_per_buffer() (drivers/firewire/ohci.c)
->flush_iso_completions()
->struct fw_iso_context.callback.sc()
= out_stream_callback() or in_stream_callback()However, we have another chance for packet processing. It's done in PCM
frame handling via ALSA PCM interfaces.
(in process context)
ioctl(i.e. SNDRV_PCM_IOCTL_HWSYNC)
->snd_pcm_hwsync() (sound/core/pcm_native.c)
->snd_pcm_update_hw_ptr() (sound/core/pcm_lib.c)
->snd_pcm_update_hw_ptr0()
->struct snd_pcm_ops.pointer()
= amdtp_stream_pcm_pointer()
->fw_iso_context_flush_completions() (drivers/firewire/core-iso.c)
->struct fw_card_driver.flush_iso_completions()
= ohci_flush_iso_completions() (drivers/firewire/ohci.c)
->flush_iso_completions()
->struct fw_iso_context.callback.sc()
= out_stream_callback() or in_stream_callback()This design is for a better granularity of PCM pointer. When ioctl(2) is
executed with some commands for ALSA PCM interface, queued packets are
handled at first. Then, the latest number of handled PCM frames is
reported. The number can represent PCM frames transferred in most near
isochronous cycle.Current tracepoints include no information to distinguish running contexts.
When tracing the interval of software IRQ context, this is not good.This commit adds more information for current context. Additionally, the
index of packet processed in one context is added in a case that packet
processing is executed in continuous context of the same kind,As a result, the output includes 11 fields with additional two fields
to commit 0c95c1d6197f ("ALSA: firewire-lib: add tracepoints to dump a part
of isochronous packet data"):
17131.9186: out_packet: 07 7494 ffc0 ffc1 00 000700c0 9001a496 058 45 1 13
17131.9186: out_packet: 07 7495 ffc0 ffc1 00 000700c8 9001ba00 058 46 1 14
17131.9186: out_packet: 07 7496 ffc0 ffc1 00 000700d0 9001ffff 002 47 1 15
17131.9189: out_packet: 07 7497 ffc0 ffc1 00 000700d0 9001d36a 058 00 0 00
17131.9189: out_packet: 07 7498 ffc0 ffc1 00 000700d8 9001e8d4 058 01 0 01
17131.9189: out_packet: 07 7499 ffc0 ffc1 00 000700e0 9001023e 058 02 0 00
17131.9206: in_packet: 07 7447 ffc1 ffc0 01 3f070072 9001783d 058 32 1 00
17131.9206: in_packet: 07 7448 ffc1 ffc0 01 3f070072 90ffffff 002 33 1 01
17131.9206: in_packet: 07 7449 ffc1 ffc0 01 3f07007a 900191a8 058 34 1 02
(Here, some common fields are omitted so that a line is within 80
characters.)The legend is:
- The second of cycle scheduled for the packet
- The count of cycle scheduled for the packet
- The ID of node as source (hex)
- The ID of node as destination (hex)
- The value of isochronous channel
- The first quadlet of CIP header (hex)
- The second quadlet of CIP header (hex)
- The number of included quadlets
- The index of packet in a buffer maintained by this module
- 0 in process context, 1 in IRQ context
- The index of packet processed in the contextSigned-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
…etter PCM period granularity
These three commits were merged to improve PCM pointer granularity.
commit 76fb87894828 ("ALSA: firewire-lib: taskletize the snd_pcm_period_elapsed() call")
commit e9148dddc3c7 ("ALSA: firewire-lib: flush completed packets when reading PCM position")
commit 92b862c7d685 ("ALSA: firewire-lib: optimize packet flushing")The point of them is to handle queued packets not only in software IRQ
context of IR/IT contexts, but also in process context. As a result of
handling packets, period tasklet is scheduled when acrossing PCM period
boundary. This is to prevent recursive call of
'struct snd_pcm_ops.pointer()' in the same context.When the pointer callback is executed in the process context, it's
better to avoid the second callback in the software IRQ context. The
software IRQ context runs immediately after scheduled in the process
context because few packets are queued yet.For the aim, 'pointer_flush' is used, however it causes a race condition
between the process context and software IRQ context of IR/IT contexts.Practically, this race is not so critical because it influences process
context to skip flushing queued packet and to get worse granularity of
PCM pointer. The race condition is quite rare but it should be improved
for stable service.The similar effect can be achieved by using 'in_interrupt()' macro. This
commit obsoletes 'pointer_flush' with it.Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 May, 2016
7 commits
-
In former commit, drivers in ALSA firewire stack always starts IT context
before IR context. If IR context starts after packets are transmitted by
peer unit, packet discontinuity may be detected because the context starts
in the middle of packet streaming. This situation is rare because IT
context usually starts immediately. However, it's better to solve this
issue. This is suppressed with CIP_SKIP_INIT_DBC_CHECK flag.This commit enables the same feature as CIP_SKIP_INIT_DBC_CHECK.
Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
In previous commit, this module has no need to reuse parameters of
incoming packets for outgoing packets anymore. This commit arranges some
needless codes for outgoing packet processing.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
In previous commit, this module has no need to reuse parameters of
incoming packets for outgoing packets anymore. This commit arranges some
needless codes for incoming packet processing.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
In clause 6.3 of IEC 61883-6:2000, there's an explanation about processing
of presentation timestamp. In the clause, we can see "If a function block
receives a CIP, processes it and subsequently re-transmits it, then the
SYT of the outgoing CIP shall be the sum of the incoming SYT and the
processing delay." ALSA firewire stack has an implementation to partly
satisfy this specification. Developers assumed the stack to perform as an
Audio function block[1].Following to the assumption, current implementation of ALSA firewire stack
use one software interrupt context to handle both of in/out packets. In
most case, this is processed in 1394 OHCI IR context independently of the
opposite context. Thus, this implementation uses longer CPU time in the
software interrupt context. This is not better for whole system.Against the assumption, I confirmed that each ASIC for IEC 61883-1/6
doesn't necessarily expect it to the stack. Thus, current implementation
of ALSA firewire stack includes over-engineering.This commit purges the implementation. As a result, packets of one
direction are handled in one software interrupt context and spends
minimum CPU time.[1] [alsa-devel] [PATCH 0/8] [RFC] new driver for Echo Audio's Fireworks based devices
http://mailman.alsa-project.org/pipermail/alsa-devel/2013-June/062660.htmlSigned-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
In packet streaming protocol applied to TASCAM FireWire series, the value
of SYT field in CIP header is always zero, therefore it has no meaning.
There's no need to synchronize packets in both direction for the series.In current implementation of ALSA firewire stack, driver for the series
uses incoming packet parameter for outgoing packet parameter to calculate
the number of data blocks. This can be simplified because the task of
corresponding driver is to transfer data blocks enough to sampling transfer
frequency.This commit purges support of full duplex synchronization to prevent
over-engineering implementation.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
On Fireworks board module of Echo Audio, TSB43Cx43A (IceLynx Micro, iCEM)
is used to process payload of isochronous packets. There's an public
document of this chip[1]. This document is for firmware programmers to
transfer/receive AMDTP with IEC60958 data format, however in clause 2.5,
2.6 and 2.7, we can see system design to utilize the sequence of value in
SYT field of CIP header. In clause 2.3, we can see the specification of
Audio Master Clock (MCLK) from iCEM.Well, this clock is actually not used for sampling clock. This can be
confirmed when corresponding driver transfer random value as the sequence
of SYT field. Even if in this case, the unit generates proper sound.Additionally, in unique command set for this board module, the format
of CIP is changed; for IEC 61883-6 mode which we use, and for Windows
Operating System. In the latter mode, the whole 32 bit field in second CIP
header from Windows driver is used to represent counter of packets (NO-DATA
code is still used for packets without data blocks). If the master clock
was physically used by DSP on the board module, the Windows driver must
have transferred correct sequence of SYT field.Furthermore, as long as seeing capacities of AudioFire2, AudioFire4,
AudioFire8, AudioFirePre8 and AudioFire12, these models don't support
SYT-Match clock source.Summary, we have no need to relate incoming/outgoing packets. This commit
drops reusing SYT sequence of incoming packets for outgoing packets.[1] Using TSB43Cx43A: S/PDIF over 1394 (2003, Texus Instruments
Incorporated)
http://www.ti.com/analog/docs/litabsmultiplefilelist.tsp?literatureNumber=slla148&docCategoryId=1&familyId=361Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
Windows driver for BeBoB-based models mostly wait for transmitted packets,
then transfer packets to the models. This looks for the relationship
between incoming packets and outgoing packets to synchronize the sequence
of presentation timestamp.However, the sequence between packets of both direction has no
relationship. Even if receiving NO-DATA packets, the drivers transfer
packets with meaningful value in SYT field. Additionally, the order of
starting packets is always the same, independently of the source of clock.
The corresponding driver is expected as a generator of presentation
timestamp and these models can select it as a source of sampling clock.This commit drops reusing SYT sequence from ALSA bebob driver. The driver
always transfer packets with presentation timestamp generated by ALSA
firewire stack, without re-using the sequence of value in SYT field in
incoming packets to outgoing packets.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
09 May, 2016
3 commits
-
When audio and music units have some quirks in their sequence of packet,
it's really hard for non-owners to identify the quirks. Although developers
need dumps for sequence of packets, it's difficult for users who have no
knowledges and no equipments for this purpose.This commit adds tracepoints for this situation. When users encounter
the issue, they can dump a part of packet data via Linux tracing framework
as long as using drivers in ALSA firewire stack.Additionally, tracepoints for outgoing packets will be our help to check
and debug packet processing of ALSA firewire stack.This commit newly adds 'snd_firewire_lib' subsystem with 'in_packet' and
'out_packet' events. In the events, some attributes of packets and the
index of packet managed by this module are recorded per packet.This is an usage:
$ trace-cmd record -e snd_firewire_lib:out_packet \
-e snd_firewire_lib:in_packet
/sys/kernel/tracing/events/snd_firewire_lib/out_packet/filter
/sys/kernel/tracing/events/snd_firewire_lib/in_packet/filter
Hit Ctrl^C to stop recording
^C
$ trace-cmd report trace.dat
...
23647.033934: in_packet: 01 4073 ffc0 ffc1 00 000f0040 9001b2d1 122 44
23647.033936: in_packet: 01 4074 ffc0 ffc1 00 000f0048 9001c83b 122 45
23647.033937: in_packet: 01 4075 ffc0 ffc1 00 000f0050 9001ffff 002 46
23647.033938: in_packet: 01 4076 ffc0 ffc1 00 000f0050 9001e1a6 122 47
23647.035426: out_packet: 01 4123 ffc1 ffc0 01 010f00d0 9001fb40 122 17
23647.035428: out_packet: 01 4124 ffc1 ffc0 01 010f00d8 9001ffff 002 18
23647.035429: out_packet: 01 4125 ffc1 ffc0 01 010f00d8 900114aa 122 19
23647.035430: out_packet: 01 4126 ffc1 ffc0 01 010f00e0 90012a15 122 20
(Here, some common fields are omitted so that a line to be within 80
characters.)
...One line represent one packet. The legend for the last nine fields is:
- The second of cycle scheduled for the packet
- The count of cycle scheduled for the packet
- The ID of node as source (hex)
- Some devices transfer packets with invalid source node ID in their CIP
header.
- The ID of node as destination (hex)
- The value is not in CIP header of packets.
- The value of isochronous channel
- The first quadlet of CIP header (hex)
- The second quadlet of CIP header (hex)
- The number of included quadlets
- The index of packet in a buffer maintained by this moduleThis is an example to parse these lines from text file by Python3 script:
\#!/usr/bin/env python3
import sysdef parse_ts(second, cycle, syt):
offset = syt & 0xfff
syt >>= 12
if cycle & 0x0f > syt:
cycle += 0x10
cycle &= 0x1ff0
cycle |= syt
second += cycle // 8000
cycle %= 8000
# In CYCLE_TIMER of 1394 OHCI, second is represented in 8 bit.
second %= 128
return (second, cycle, offset)def calc_ts(second, cycle, offset):
ts = offset
ts += cycle * 3072
# In DMA descriptor of 1394 OHCI, second is represented in 3 bit.
ts += (second % 8) * 8000 * 3072
return tsdef subtract_ts(minuend, subtrahend):
# In DMA descriptor of 1394 OHCI, second is represented in 3 bit.
if minuend < subtrahend:
minuend += 8 * 8000 * 3072
return minuend - subtrahendif len(sys.argv) != 2:
print('At least, one argument is required for packet dump.')
sys.exit()filename = sys.argv[1]
data = []
prev = 0
with open(filename, 'r') as f:
for line in f:
pos = line.find('packet:')
if pos < 0:
continuepos += len('packet:')
line = line[pos:].strip()
fields = line.split(' ')datum = []
datum.append(fields[8])
syt = int(fields[6][4:], 16)
# Empty packet in IEC 61883-1, or NODATA in IEC 61883-6
if syt == 0xffff:
data_blocks = 0
else:
payload_size = int(fields[7], 10)
data_block_size = int(fields[5][2:4], 16)
data_blocks = (payload_size - 2) / data_block_size
datum.append(data_blocks)second = int(fields[0], 10)
cycle = int(fields[1], 10)
start = (second << 25) | (cycle << 12)
datum.append('0x{0:08x}'.format(start))
start = calc_ts(second, cycle, 0)datum.append("0x" + fields[5])
datum.append("0x" + fields[6])if syt == 0xffff:
second = 0
cycle = 0
tick = 0
else:
second, cycle, tick = parse_ts(second, cycle, syt)
ts = calc_ts(second, cycle, tick)
datum.append(start)
datum.append(ts)
if ts == 0:
datum.append(0)
datum.append(0)
else:
# Usual case, or a case over 8 seconds.
if ts > start or start > 7 * 8000 * 3072:
datum.append(subtract_ts(ts, start))
if ts > prev or start > 7 * 8000 * 3072:
gap = subtract_ts(ts, prev)
datum.append(gap)
else:
datum.append('backward')
else:
datum.append('invalid')
prev = tsdata.append(datum)
sys.exit()
The data variable includes array with these elements:
- The index of the packet
- The number of data blocks in the packet
- The value of cycle count (hex)
- The value of CIP header 1 (hex)
- The value of CIP header 2 (hex)
- The value of cycle count (tick)
- The value of calculated presentation timestamp (tick)
- The offset between the cycle count and presentation timestamp
- The elapsed ticks from the previous presentation timestampSigned-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
In callback function of isochronous context, modules can queue packets to
indicated isochronous cycles. Although the cycle to queue a packet is
deterministic by calculation, this module doesn't implement the calculation
because it's useless for processing.In future, the cycle count is going to be printed with the other parameters
for debugging. This commit is the preparation. The cycle count is computed
by cycle unit, and correctly arranged to corresponding packets. The
calculated count is used in later commit.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai -
In callback function of isochronous context, u32 variable is passed for
cycle count. The value of this variable comes from DMA descriptors of 1394
Open Host Controller Interface (1394 OHCI). In the specification, DMA
descriptors transport lower 3 bits for second field and full cycle field in
16 bits field, therefore 16 bits of the u32 variable are available. The
value for second is modulo 8, and the value for cycle is modulo 8,000.Currently, ALSA firewire-lib module don't use the value of the second
field, because the value is useless to calculate presentation timestamp in
IEC 61883-6. However, the value may be useful for debugging. In later
commit, it will be printed with the other parameters for debugging.This commit makes this module to handle the whole cycle count including
second. The value is calculated by cycle unit. The existed code is already
written with ignoring the value of second, thus this commit causes no
issues.Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai
08 May, 2016
1 commit
-
M-Audio Profire 610 has an unexpected value in version field of its config
ROM, thus ALSA dice driver is not assigned to the model due to a mismatch
of modalias.This commit adds an entry to support the model. I expect the entry is
also for Profire 2626.I note that Profire 610 uses TCD2220 (so-called Dice Jr.), and supports a
part of Extended Application Protocol (EAP).$ cd linux-firewire-utils/src
$ ./crpp < /sys/bus/firewire/devices/fw1/config_rom
ROM header and bus information block
------------------------------------------------------------
400 04047689 bus_info_length 4, crc_length 4, crc 30345
404 31333934 bus_name "1394"
408 e0ff8112 irmc 1, cmc 1, isc 1, bmc 0, pmc 0, cyc_clk_acc 255,
max_rec 8 (512), max_rom 1, gen 1, spd 2 (S400)
40c 000d6c04 company_id 000d6c |
410 04400002 device_id 0404400002 | EUI-64 000d6c0404400002root directory
------------------------------------------------------------
414 000695fe directory_length 6, crc 38398
418 03000d6c vendor
41c 8100000a --> descriptor leaf at 444
420 17000011 model
424 8100000d --> descriptor leaf at 458
428 0c0087c0 node capabilities per IEEE 1394
42c d1000001 --> unit directory at 430unit directory at 430
------------------------------------------------------------
430 0004fb14 directory_length 4, crc 64276
434 12000d6c specifier id
438 130100d1 version
43c 17000011 model
440 8100000c --> descriptor leaf at 470descriptor leaf at 444
------------------------------------------------------------
444 0004b8e4 leaf_length 4, crc 47332
448 00000000 textual descriptor
44c 00000000 minimal ASCII
450 4d2d4175 "M-Au"
454 64696f00 "dio"descriptor leaf at 458
------------------------------------------------------------
458 00053128 leaf_length 5, crc 12584
45c 00000000 textual descriptor
460 00000000 minimal ASCII
464 50726f46 "ProF"
468 69726520 "ire "
46c 36313000 "610"descriptor leaf at 470
------------------------------------------------------------
470 00053128 leaf_length 5, crc 12584
474 00000000 textual descriptor
478 00000000 minimal ASCII
47c 50726f46 "ProF"
480 69726520 "ire "
484 36313000 "610"$ cat /proc/asound/card1/dice
sections:
global: offset 10, size 90
tx: offset 100, size 142
rx: offset 242, size 282
ext_sync: offset 524, size 4
unused2: offset 0, size 0
global:
owner: ffc0:000100000000
notification: 00000040
nick name: FW610
clock select: internal 48000
enable: 1
status: locked 48000
ext status: 00000040
sample rate: 48000
version: 1.0.4.0
clock caps: 32000 44100 48000 88200 96000 176400 192000 aes1 aes4 aes adat tdif wc arx1 arx2 internal
clock source names: SPDIF\AES34\AES56\TOS\AES_ANY\ADAT\ADAT_AUX\Word Clock\Unused\Unused\Unused\Unused\Internal\\
...Signed-off-by: Takashi Sakamoto
Signed-off-by: Takashi Iwai