diff options
Diffstat (limited to 'sound/firewire/fireface/ff-protocol-former.c')
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-former.c | 194 |
1 files changed, 161 insertions, 33 deletions
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c index bf44cad7985e..efd59e9d9935 100644 --- a/sound/firewire/fireface/ff-protocol-former.c +++ b/sound/firewire/fireface/ff-protocol-former.c @@ -2,8 +2,6 @@ // ff-protocol-former.c - a part of driver for RME Fireface series // // Copyright (c) 2019 Takashi Sakamoto -// -// Licensed under the terms of the GNU General Public License, version 2. #include <linux/delay.h> @@ -404,8 +402,8 @@ static void ff800_finish_session(struct snd_ff *ff) // address. // A write transaction to clear registered higher 4 bytes of destination address // has an effect to suppress asynchronous transaction from device. -static void ff800_handle_midi_msg(struct snd_ff *ff, unsigned int offset, - __le32 *buf, size_t length) +static void ff800_handle_midi_msg(struct snd_ff *ff, unsigned int offset, const __le32 *buf, + size_t length, u32 tstamp) { int i; @@ -420,7 +418,7 @@ static void ff800_handle_midi_msg(struct snd_ff *ff, unsigned int offset, } const struct snd_ff_protocol snd_ff_protocol_ff800 = { - .handle_midi_msg = ff800_handle_midi_msg, + .handle_msg = ff800_handle_midi_msg, .fill_midi_msg = former_fill_midi_msg, .get_clock = former_get_clock, .switch_fetching_mode = former_switch_fetching_mode, @@ -536,6 +534,35 @@ static void ff400_finish_session(struct snd_ff *ff) FF400_ISOC_COMM_STOP, ®, sizeof(reg), 0); } +static void parse_midi_msg(struct snd_ff *ff, u32 quad, unsigned int port) +{ + struct snd_rawmidi_substream *substream = READ_ONCE(ff->tx_midi_substreams[port]); + + if (substream != NULL) { + u8 byte = (quad >> (16 * port)) & 0x000000ff; + + snd_rawmidi_receive(substream, &byte, 1); + } +} + +#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 // select one of 4 options: @@ -555,46 +582,147 @@ static void ff400_finish_session(struct snd_ff *ff) // input attenuation. This driver allocates destination address with '0000'0000 // in its lower offset and expects userspace application to configure the // register for it. -static void ff400_handle_midi_msg(struct snd_ff *ff, unsigned int offset, - __le32 *buf, size_t length) + +// 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]); - u8 byte; - unsigned int index; - struct snd_rawmidi_substream *substream; - /* Message in first port. */ - /* - * This value may represent the index of this unit when the same - * units are on the same IEEE 1394 bus. This driver doesn't use - * it. - */ - index = (quad >> 8) & 0xff; - if (index > 0) { - substream = READ_ONCE(ff->tx_midi_substreams[0]); - if (substream != NULL) { - byte = quad & 0xff; - snd_rawmidi_receive(substream, &byte, 1); - } - } + if (quad & FF400_MSG_FLAG_IS_SIGNAL_LEVEL) { + struct ff400_msg_parser *parser = ff->msg_parser; - /* Message in second port. */ - index = (quad >> 24) & 0xff; - if (index > 0) { - substream = READ_ONCE(ff->tx_midi_substreams[1]); - if (substream != NULL) { - byte = (quad >> 16) & 0xff; - snd_rawmidi_receive(substream, &byte, 1); - } + 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) { + 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 snd_firewire_event_ff400_message ev = { + .type = SNDRV_FIREWIRE_EVENT_FF400_MESSAGE, + .message_count = 0, + }; + struct ff400_msg_parser *parser = ff->msg_parser; + long consumed = 0; + long ret = 0; + + if (count < sizeof(ev) || parser->pull_pos == parser->push_pos) + return 0; + + count -= sizeof(ev); + consumed += sizeof(ev); + + 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))) + ret = -EFAULT; + spin_lock_irq(&ff->lock); + if (ret) + return ret; + + ++parser->pull_pos; + if (parser->pull_pos >= FF400_QUEUE_SIZE) + parser->pull_pos = 0; + ++ev.message_count; + count -= sizeof(*parser->msgs); + consumed += sizeof(*parser->msgs); + } + + spin_unlock_irq(&ff->lock); + if (copy_to_user(buf, &ev, sizeof(ev))) + ret = -EFAULT; + spin_lock_irq(&ff->lock); + if (ret) + return ret; + + return consumed; } const struct snd_ff_protocol snd_ff_protocol_ff400 = { - .handle_midi_msg = ff400_handle_midi_msg, + .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, .switch_fetching_mode = former_switch_fetching_mode, |