diff options
| author | Jay Fenlason <fenlason@redhat.com> | 2009-03-05 19:08:40 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-03-24 20:56:49 +0100 |
| commit | f8c2287c65f8f72000102fc058232669e4540bc4 (patch) | |
| tree | a82393fbdd3a2b20f8e499537b10eb9e61dae941 /drivers/firewire/fw-transaction.c | |
| parent | ba27e1f7bf220799cd3d7503f82bda71b8ebe8c5 (diff) | |
firewire: implement asynchronous stream transmission
Allow userspace and other firewire drivers (fw-ipv4 I'm looking at
you!) to send Asynchronous Transmit Streams as described in 7.8.3 of
release 1.1 of the 1394 Open Host Controller Interface Specification.
Signed-off-by: Jay Fenlason <fenlason@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (tweaks)
Diffstat (limited to 'drivers/firewire/fw-transaction.c')
| -rw-r--r-- | drivers/firewire/fw-transaction.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c index 76938fe432a..e3da5899196 100644 --- a/drivers/firewire/fw-transaction.c +++ b/drivers/firewire/fw-transaction.c @@ -37,6 +37,10 @@ #include "fw-topology.h" #include "fw-device.h" +#define HEADER_TAG(tag) ((tag) << 14) +#define HEADER_CHANNEL(ch) ((ch) << 8) +#define HEADER_SY(sy) ((sy) << 0) + #define HEADER_PRI(pri) ((pri) << 0) #define HEADER_TCODE(tcode) ((tcode) << 4) #define HEADER_RETRY(retry) ((retry) << 8) @@ -293,6 +297,27 @@ void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, } EXPORT_SYMBOL(fw_send_request); +void fw_send_stream_packet(struct fw_card *card, struct fw_packet *p, + int generation, int speed, int channel, int sy, int tag, + void *payload, size_t length, fw_packet_callback_t callback) +{ + p->callback = callback; + p->header[0] = + HEADER_DATA_LENGTH(length) + | HEADER_TAG(tag) + | HEADER_CHANNEL(channel) + | HEADER_TCODE(TCODE_STREAM_DATA) + | HEADER_SY(sy); + p->header_length = 4; + p->payload = payload; + p->payload_length = length; + p->speed = speed; + p->generation = generation; + p->ack = 0; + + card->driver->send_request(card, p); +} + struct transaction_callback_data { struct completion done; void *payload; |