diff options
Diffstat (limited to 'sound/firewire/fireface/ff-protocol-former.c')
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-former.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c index 5f97e7fc7281..279bd032acf0 100644 --- a/sound/firewire/fireface/ff-protocol-former.c +++ b/sound/firewire/fireface/ff-protocol-former.c @@ -10,6 +10,42 @@ #include "ff.h" #define FORMER_REG_SYNC_STATUS 0x0000801c0000ull +/* For block write request. */ +#define FORMER_REG_FETCH_PCM_FRAMES 0x0000801c0000ull + +static int former_switch_fetching_mode(struct snd_ff *ff, bool enable) +{ + unsigned int count; + __le32 *reg; + int i; + int err; + + count = 0; + for (i = 0; i < SND_FF_STREAM_MODE_COUNT; ++i) + count = max(count, ff->spec->pcm_playback_channels[i]); + + reg = kcalloc(count, sizeof(__le32), GFP_KERNEL); + if (!reg) + return -ENOMEM; + + if (!enable) { + /* + * Each quadlet is corresponding to data channels in a data + * blocks in reverse order. Precisely, quadlets for available + * data channels should be enabled. Here, I take second best + * to fetch PCM frames from all of data channels regardless of + * stf. + */ + for (i = 0; i < count; ++i) + reg[i] = cpu_to_le32(0x00000001); + } + + err = snd_fw_transaction(ff->unit, TCODE_WRITE_BLOCK_REQUEST, + FORMER_REG_FETCH_PCM_FRAMES, reg, + sizeof(__le32) * count, 0); + kfree(reg); + return err; +} static void dump_clock_config(struct snd_ff *ff, struct snd_info_buffer *buffer) { @@ -347,6 +383,7 @@ static void ff800_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length) const struct snd_ff_protocol snd_ff_protocol_ff800 = { .handle_midi_msg = ff800_handle_midi_msg, + .switch_fetching_mode = former_switch_fetching_mode, .begin_session = ff800_begin_session, .finish_session = ff800_finish_session, .dump_status = former_dump_status, @@ -495,6 +532,7 @@ static void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length) const struct snd_ff_protocol snd_ff_protocol_ff400 = { .handle_midi_msg = ff400_handle_midi_msg, + .switch_fetching_mode = former_switch_fetching_mode, .begin_session = ff400_begin_session, .finish_session = ff400_finish_session, .dump_status = former_dump_status, |