ff.h
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/*
* ff.h - a part of driver for RME Fireface series
*
* Copyright (c) 2015-2017 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#ifndef SOUND_FIREFACE_H_INCLUDED
#define SOUND_FIREFACE_H_INCLUDED
#include <linux/device.h>
#include <linux/firewire.h>
#include <linux/firewire-constants.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/compat.h>
#include <linux/sched/signal.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/rawmidi.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/hwdep.h>
#include <sound/firewire.h>
#include "../lib.h"
#include "../amdtp-stream.h"
#include "../iso-resources.h"
#define SND_FF_STREAM_MODES 3
#define SND_FF_MAXIMIM_MIDI_QUADS 9
#define SND_FF_IN_MIDI_PORTS 2
#define SND_FF_OUT_MIDI_PORTS 2
struct snd_ff_protocol;
struct snd_ff_spec {
const char *const name;
const unsigned int pcm_capture_channels[SND_FF_STREAM_MODES];
const unsigned int pcm_playback_channels[SND_FF_STREAM_MODES];
unsigned int midi_in_ports;
unsigned int midi_out_ports;
const struct snd_ff_protocol *protocol;
};
struct snd_ff {
struct snd_card *card;
struct fw_unit *unit;
struct mutex mutex;
spinlock_t lock;
bool registered;
struct delayed_work dwork;
const struct snd_ff_spec *spec;
/* To handle MIDI tx. */
struct snd_rawmidi_substream *tx_midi_substreams[SND_FF_IN_MIDI_PORTS];
struct fw_address_handler async_handler;
/* TO handle MIDI rx. */
struct snd_rawmidi_substream *rx_midi_substreams[SND_FF_OUT_MIDI_PORTS];
u8 running_status[SND_FF_OUT_MIDI_PORTS];
__le32 msg_buf[SND_FF_OUT_MIDI_PORTS][SND_FF_MAXIMIM_MIDI_QUADS];
struct work_struct rx_midi_work[SND_FF_OUT_MIDI_PORTS];
struct fw_transaction transactions[SND_FF_OUT_MIDI_PORTS];
ktime_t next_ktime[SND_FF_OUT_MIDI_PORTS];
bool rx_midi_error[SND_FF_OUT_MIDI_PORTS];
unsigned int rx_bytes[SND_FF_OUT_MIDI_PORTS];
unsigned int substreams_counter;
struct amdtp_stream tx_stream;
struct amdtp_stream rx_stream;
struct fw_iso_resources tx_resources;
struct fw_iso_resources rx_resources;
int dev_lock_count;
bool dev_lock_changed;
wait_queue_head_t hwdep_wait;
};
enum snd_ff_clock_src {
SND_FF_CLOCK_SRC_INTERNAL,
SND_FF_CLOCK_SRC_SPDIF,
SND_FF_CLOCK_SRC_ADAT,
SND_FF_CLOCK_SRC_WORD,
SND_FF_CLOCK_SRC_LTC,
/* TODO: perhaps ADAT2 and TCO exists. */
};
struct snd_ff_protocol {
int (*get_clock)(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src);
int (*begin_session)(struct snd_ff *ff, unsigned int rate);
void (*finish_session)(struct snd_ff *ff);
int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);
void (*dump_sync_status)(struct snd_ff *ff,
struct snd_info_buffer *buffer);
void (*dump_clock_config)(struct snd_ff *ff,
struct snd_info_buffer *buffer);
u64 midi_high_addr_reg;
u64 midi_rx_port_0_reg;
u64 midi_rx_port_1_reg;
};
extern const struct snd_ff_protocol snd_ff_protocol_ff400;
int snd_ff_transaction_register(struct snd_ff *ff);
int snd_ff_transaction_reregister(struct snd_ff *ff);
void snd_ff_transaction_unregister(struct snd_ff *ff);
int amdtp_ff_set_parameters(struct amdtp_stream *s, unsigned int rate,
unsigned int pcm_channels);
int amdtp_ff_add_pcm_hw_constraints(struct amdtp_stream *s,
struct snd_pcm_runtime *runtime);
int amdtp_ff_init(struct amdtp_stream *s, struct fw_unit *unit,
enum amdtp_stream_direction dir);
int snd_ff_stream_init_duplex(struct snd_ff *ff);
void snd_ff_stream_destroy_duplex(struct snd_ff *ff);
int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate);
void snd_ff_stream_stop_duplex(struct snd_ff *ff);
void snd_ff_stream_update_duplex(struct snd_ff *ff);
void snd_ff_stream_lock_changed(struct snd_ff *ff);
int snd_ff_stream_lock_try(struct snd_ff *ff);
void snd_ff_stream_lock_release(struct snd_ff *ff);
void snd_ff_proc_init(struct snd_ff *ff);
int snd_ff_create_midi_devices(struct snd_ff *ff);
int snd_ff_create_pcm_devices(struct snd_ff *ff);
int snd_ff_create_hwdep_devices(struct snd_ff *ff);
#endif