diff options
Diffstat (limited to 'sound/firewire/fireface/ff-protocol-former.c')
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-former.c | 68 |
1 files changed, 67 insertions, 1 deletions
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c index 279bd032acf0..d32104ed0c08 100644 --- a/sound/firewire/fireface/ff-protocol-former.c +++ b/sound/firewire/fireface/ff-protocol-former.c @@ -12,6 +12,70 @@ #define FORMER_REG_SYNC_STATUS 0x0000801c0000ull /* For block write request. */ #define FORMER_REG_FETCH_PCM_FRAMES 0x0000801c0000ull +#define FORMER_REG_CLOCK_CONFIG 0x0000801c0004ull + +static int former_get_clock(struct snd_ff *ff, unsigned int *rate, + enum snd_ff_clock_src *src) +{ + __le32 reg; + u32 data; + int err; + + err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST, + FORMER_REG_CLOCK_CONFIG, ®, sizeof(reg), 0); + if (err < 0) + return err; + data = le32_to_cpu(reg); + + /* Calculate sampling rate. */ + switch ((data >> 1) & 0x03) { + case 0x01: + *rate = 32000; + break; + case 0x00: + *rate = 44100; + break; + case 0x03: + *rate = 48000; + break; + case 0x02: + default: + return -EIO; + } + + if (data & 0x08) + *rate *= 2; + else if (data & 0x10) + *rate *= 4; + + /* Calculate source of clock. */ + if (data & 0x01) { + *src = SND_FF_CLOCK_SRC_INTERNAL; + } else { + /* TODO: 0x02, 0x06, 0x07? */ + switch ((data >> 10) & 0x07) { + case 0x00: + *src = SND_FF_CLOCK_SRC_ADAT1; + break; + case 0x01: + *src = SND_FF_CLOCK_SRC_ADAT2; + break; + case 0x03: + *src = SND_FF_CLOCK_SRC_SPDIF; + break; + case 0x04: + *src = SND_FF_CLOCK_SRC_WORD; + break; + case 0x05: + *src = SND_FF_CLOCK_SRC_LTC; + break; + default: + return -EIO; + } + } + + return 0; +} static int former_switch_fetching_mode(struct snd_ff *ff, bool enable) { @@ -56,7 +120,7 @@ static void dump_clock_config(struct snd_ff *ff, struct snd_info_buffer *buffer) int err; err = snd_fw_transaction(ff->unit, TCODE_READ_BLOCK_REQUEST, - SND_FF_REG_CLOCK_CONFIG, ®, sizeof(reg), 0); + FORMER_REG_CLOCK_CONFIG, ®, sizeof(reg), 0); if (err < 0) return; @@ -383,6 +447,7 @@ 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, + .get_clock = former_get_clock, .switch_fetching_mode = former_switch_fetching_mode, .begin_session = ff800_begin_session, .finish_session = ff800_finish_session, @@ -532,6 +597,7 @@ 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, + .get_clock = former_get_clock, .switch_fetching_mode = former_switch_fetching_mode, .begin_session = ff400_begin_session, .finish_session = ff400_finish_session, |