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ALSA: fireworks/firewire-lib: Add a quirk for wrong dbs in tx packets

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One of Fireworks firmware, named  as 'AudioFire9', seems to transmit
packets with wrong value of dbs. It's always 0x11 but actual size of
data block is different.

This commit adds a flag for this quirk and some codes to calculate
correct size.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2014-04-25 22:45:05 +09:00 committed by Takashi Iwai
parent c8bdf49b99
commit 697022391e
5 changed files with 13 additions and 0 deletions
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2
sound/firewire/amdtp.c
View File

@ -653,6 +653,8 @@ static void handle_in_packet(struct amdtp_stream *s,
cip_header[0]);
goto err;
}
if (s->flags & CIP_WRONG_DBS)
data_block_quadlets = s->data_block_quadlets;
data_blocks = (payload_quadlets - 2) / data_block_quadlets;
}

3
sound/firewire/amdtp.h
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@ -21,6 +21,8 @@
* @CIP_EMPTY_WITH_TAG0: Only for in-stream. Empty in-packets have TAG0.
* @CIP_DBC_IS_END_EVENT: Only for in-stream. The value of dbc in an in-packet
* corresponds to the end of event in the packet. Out of IEC 61883.
* @CIP_WRONG_DBS: Only for in-stream. The value of dbs is wrong in in-packets.
* The value of data_block_quadlets is used instead of reported value.
*/
enum cip_flags {
CIP_NONBLOCKING = 0x00,
@ -28,6 +30,7 @@ enum cip_flags {
CIP_SYNC_TO_DEVICE = 0x02,
CIP_EMPTY_WITH_TAG0 = 0x04,
CIP_DBC_IS_END_EVENT = 0x08,
CIP_WRONG_DBS = 0x10,
};
/**

2
sound/firewire/fireworks/fireworks.c
View File

@ -205,6 +205,8 @@ efw_probe(struct fw_unit *unit,
err = get_hardware_info(efw);
if (err < 0)
goto error;
if (entry->model_id == MODEL_ECHO_AUDIOFIRE_9)
efw->is_af9 = true;
err = snd_efw_stream_init_duplex(efw);
if (err < 0)

3
sound/firewire/fireworks/fireworks.h
View File

@ -61,6 +61,9 @@ struct snd_efw {
u32 seqnum;
bool resp_addr_changable;
/* for quirks */
bool is_af9;
unsigned int midi_in_ports;
unsigned int midi_out_ports;

3
sound/firewire/fireworks/fireworks_stream.c
View File

@ -198,6 +198,9 @@ int snd_efw_stream_init_duplex(struct snd_efw *efw)
efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
/* Fireworks has its own meaning for dbc. */
efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
/* AudioFire9 always reports wrong dbs. */
if (efw->is_af9)
efw->tx_stream.flags |= CIP_WRONG_DBS;
err = init_stream(efw, &efw->rx_stream);
if (err < 0) {