diff options
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-former.c | 143 |
1 files changed, 137 insertions, 6 deletions
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c index d2cc9961b973..f58008762fe6 100644 --- a/sound/firewire/fireface/ff-protocol-former.c +++ b/sound/firewire/fireface/ff-protocol-former.c @@ -545,10 +545,23 @@ static void parse_midi_msg(struct snd_ff *ff, u32 quad, unsigned int port) } } -#define FF400_MSG_FLAG_IS_MIDI_PORT_0 0x00000100 -#define FF400_MSG_MASK_MIDI_PORT_0 0x000000ff -#define FF400_MSG_FLAG_IS_MIDI_PORT_1 0x01000000 -#define FF400_MSG_MASK_MIDI_PORT_1 0x00ff0000 +#define FF400_QUEUE_SIZE 32 + +struct ff400_msg_parser { + struct { + u32 msg; + u32 tstamp; + } msgs[FF400_QUEUE_SIZE]; + size_t push_pos; + size_t pull_pos; +}; + +static bool ff400_has_msg(struct snd_ff *ff) +{ + struct ff400_msg_parser *parser = ff->msg_parser; + + return (parser->push_pos != parser->pull_pos); +} // For Fireface 400, lower 4 bytes of destination address is configured by bit // flag in quadlet register (little endian) at 0x'0000'801'0051c. Drivers can @@ -569,22 +582,140 @@ static void parse_midi_msg(struct snd_ff *ff, u32 quad, unsigned int port) // input attenuation. This driver allocates destination address with '0000'0000 // in its lower offset and expects userspace application to configure the // register for it. + +// When the message is for signal level operation, the upper 4 bits in MSB expresses the pair of +// stereo physical port. +// - 0: Microphone input 0/1 +// - 1: Line input 0/1 +// - [2-4]: Line output 0-5 +// - 5: Headphone output 0/1 +// - 6: S/PDIF output 0/1 +// - [7-10]: ADAT output 0-7 +// +// The value of signal level can be detected by mask of 0x00fffc00. For signal level of microphone +// input: +// +// - 0: 0.0 dB +// - 10: +10.0 dB +// - 11: +11.0 dB +// - 12: +12.0 dB +// - ... +// - 63: +63.0 dB: +// - 64: +64.0 dB: +// - 65: +65.0 dB: +// +// For signal level of line input: +// +// - 0: 0.0 dB +// - 1: +0.5 dB +// - 2: +1.0 dB +// - 3: +1.5 dB +// - ... +// - 34: +17.0 dB: +// - 35: +17.5 dB: +// - 36: +18.0 dB: +// +// For signal level of any type of output: +// +// - 63: -infinite +// - 62: -58.0 dB +// - 61: -56.0 dB +// - 60: -54.0 dB +// - 59: -53.0 dB +// - 58: -52.0 dB +// - ... +// - 7: -1.0 dB +// - 6: 0.0 dB +// - 5: +1.0 dB +// - ... +// - 2: +4.0 dB +// - 1: +5.0 dB +// - 0: +6.0 dB +// +// When the message is not for signal level operation, it's for MIDI bytes. When matching to +// FF400_MSG_FLAG_IS_MIDI_PORT_0, one MIDI byte can be detected by mask of 0x000000ff. When +// matching to FF400_MSG_FLAG_IS_MIDI_PORT_1, one MIDI byte can be detected by mask of 0x00ff0000. +#define FF400_MSG_FLAG_IS_SIGNAL_LEVEL 0x04000000 +#define FF400_MSG_FLAG_IS_RIGHT_CHANNEL 0x08000000 +#define FF400_MSG_FLAG_IS_STEREO_PAIRED 0x02000000 +#define FF400_MSG_MASK_STEREO_PAIR 0xf0000000 +#define FF400_MSG_MASK_SIGNAL_LEVEL 0x00fffc00 +#define FF400_MSG_FLAG_IS_MIDI_PORT_0 0x00000100 +#define FF400_MSG_MASK_MIDI_PORT_0 0x000000ff +#define FF400_MSG_FLAG_IS_MIDI_PORT_1 0x01000000 +#define FF400_MSG_MASK_MIDI_PORT_1 0x00ff0000 + static void ff400_handle_msg(struct snd_ff *ff, unsigned int offset, const __le32 *buf, size_t length, u32 tstamp) { + bool need_hwdep_wake_up = false; int i; for (i = 0; i < length / 4; i++) { u32 quad = le32_to_cpu(buf[i]); - if (quad & FF400_MSG_FLAG_IS_MIDI_PORT_0) + if (quad & FF400_MSG_FLAG_IS_SIGNAL_LEVEL) { + struct ff400_msg_parser *parser = ff->msg_parser; + + parser->msgs[parser->push_pos].msg = quad; + parser->msgs[parser->push_pos].tstamp = tstamp; + ++parser->push_pos; + if (parser->push_pos >= FF400_QUEUE_SIZE) + parser->push_pos = 0; + + need_hwdep_wake_up = true; + } else if (quad & FF400_MSG_FLAG_IS_MIDI_PORT_0) { parse_midi_msg(ff, quad, 0); - else if (quad & FF400_MSG_FLAG_IS_MIDI_PORT_1) + } else if (quad & FF400_MSG_FLAG_IS_MIDI_PORT_1) { parse_midi_msg(ff, quad, 1); + } } + + if (need_hwdep_wake_up) + wake_up(&ff->hwdep_wait); +} + +static long ff400_copy_msg_to_user(struct snd_ff *ff, char __user *buf, long count) +{ + struct ff400_msg_parser *parser = ff->msg_parser; + u32 type = SNDRV_FIREWIRE_EVENT_FF400_MESSAGE; + long consumed = 0; + + if (count < 8) + return 0; + + spin_unlock_irq(&ff->lock); + + if (copy_to_user(buf, &type, sizeof(type))) + return -EFAULT; + + spin_lock_irq(&ff->lock); + + count -= sizeof(type); + consumed += sizeof(type); + + while (count >= sizeof(*parser->msgs) && parser->pull_pos != parser->push_pos) { + spin_unlock_irq(&ff->lock); + + if (copy_to_user(buf + consumed, parser->msgs + parser->pull_pos, + sizeof(*parser->msgs))) + return -EFAULT; + + spin_lock_irq(&ff->lock); + ++parser->pull_pos; + if (parser->pull_pos >= FF400_QUEUE_SIZE) + parser->pull_pos = 0; + count -= sizeof(*parser->msgs); + consumed += sizeof(*parser->msgs); + } + + return consumed; } const struct snd_ff_protocol snd_ff_protocol_ff400 = { + .msg_parser_size = sizeof(struct ff400_msg_parser), + .has_msg = ff400_has_msg, + .copy_msg_to_user = ff400_copy_msg_to_user, .handle_msg = ff400_handle_msg, .fill_midi_msg = former_fill_midi_msg, .get_clock = former_get_clock, |