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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2017-03-22 15:30:19 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-03-28 13:33:32 +0300 |
| commit | 2e76701bbb1fbe55f7d8538ae7f6869070eb3446 (patch) | |
| tree | 32857eb7553612105d0a9e96098b2897ae37bf9f /sound/firewire/motu/motu.h | |
| parent | 4641c939401076c0ab7faba024827069723f719c (diff) | |
| download | linux-2e76701bbb1fbe55f7d8538ae7f6869070eb3446.tar.xz | |
ALSA: firewire-motu: handle transactions specific for MOTU FireWire models
All models of MOTU FireWire series can be controlled by write transaction
to addresses in a range from 0x'ffff'f0000'0b00 to 0x'ffff'f000'0cff.
The models support asynchronous notification. This notification has 32 bit
field data, and is transferred when status of clock changes. Meaning of
the value is not enough clear yet.
Drivers can register its address to receive the notification. Write
transaction to 0x'ffff'f000'0b04 registers higher 16 bits of the address.
Write transaction to 0x'ffff'f0000'0b08 registers the rest of bits. The
address includes node ID, thus it should be registered every time of bus
reset.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/motu/motu.h')
| -rw-r--r-- | sound/firewire/motu/motu.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h index cd1b3dd3e371..ed1d779c0dcc 100644 --- a/sound/firewire/motu/motu.h +++ b/sound/firewire/motu/motu.h @@ -48,6 +48,10 @@ struct snd_motu { struct snd_motu_packet_format rx_packet_formats; struct amdtp_stream tx_stream; struct amdtp_stream rx_stream; + + /* For notification. */ + struct fw_address_handler async_handler; + u32 msg; }; enum snd_motu_spec_flags { @@ -106,4 +110,12 @@ int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate, struct snd_motu_packet_format *formats); int amdtp_motu_add_pcm_hw_constraints(struct amdtp_stream *s, struct snd_pcm_runtime *runtime); + +int snd_motu_transaction_read(struct snd_motu *motu, u32 offset, __be32 *reg, + size_t size); +int snd_motu_transaction_write(struct snd_motu *motu, u32 offset, __be32 *reg, + size_t size); +int snd_motu_transaction_register(struct snd_motu *motu); +int snd_motu_transaction_reregister(struct snd_motu *motu); +void snd_motu_transaction_unregister(struct snd_motu *motu); #endif |