sound/firewire/fireface/ff.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * ff.h - a part of driver for RME Fireface series
   4  *
   5  * Copyright (c) 2015-2017 Takashi Sakamoto
   6  */
   7
   8 #ifndef SOUND_FIREFACE_H_INCLUDED
   9 #define SOUND_FIREFACE_H_INCLUDED
  10
  11 #include <linux/device.h>
  12 #include <linux/firewire.h>
  13 #include <linux/firewire-constants.h>
  14 #include <linux/module.h>
  15 #include <linux/mod_devicetable.h>
  16 #include <linux/mutex.h>
  17 #include <linux/slab.h>
  18 #include <linux/compat.h>
  19 #include <linux/sched/signal.h>
  20
  21 #include <sound/core.h>
  22 #include <sound/info.h>
  23 #include <sound/rawmidi.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/hwdep.h>
  27 #include <sound/firewire.h>
  28
  29 #include "../lib.h"
  30 #include "../amdtp-stream.h"
  31 #include "../iso-resources.h"
  32
  33 #define SND_FF_MAXIMIM_MIDI_QUADS       9
  34 #define SND_FF_IN_MIDI_PORTS            2
  35 #define SND_FF_OUT_MIDI_PORTS           2
  36
  37 enum snd_ff_stream_mode {
  38         SND_FF_STREAM_MODE_LOW = 0,
  39         SND_FF_STREAM_MODE_MID,
  40         SND_FF_STREAM_MODE_HIGH,
  41         SND_FF_STREAM_MODE_COUNT,
  42 };
  43
  44 struct snd_ff_protocol;
  45 struct snd_ff_spec {
  46         const char *const name;
  47
  48         const unsigned int pcm_capture_channels[SND_FF_STREAM_MODE_COUNT];
  49         const unsigned int pcm_playback_channels[SND_FF_STREAM_MODE_COUNT];
  50
  51         unsigned int midi_in_ports;
  52         unsigned int midi_out_ports;
  53
  54         const struct snd_ff_protocol *protocol;
  55         u64 midi_high_addr;
  56         u8 midi_addr_range;
  57         u64 midi_rx_addrs[SND_FF_OUT_MIDI_PORTS];
  58 };
  59
  60 struct snd_ff {
  61         struct snd_card *card;
  62         struct fw_unit *unit;
  63         struct mutex mutex;
  64         spinlock_t lock;
  65
  66         bool registered;
  67         struct delayed_work dwork;
  68
  69         const struct snd_ff_spec *spec;
  70
  71         /* To handle MIDI tx. */
  72         struct snd_rawmidi_substream *tx_midi_substreams[SND_FF_IN_MIDI_PORTS];
  73         struct fw_address_handler async_handler;
  74
  75         /* TO handle MIDI rx. */
  76         struct snd_rawmidi_substream *rx_midi_substreams[SND_FF_OUT_MIDI_PORTS];
  77         bool on_sysex[SND_FF_OUT_MIDI_PORTS];
  78         __le32 msg_buf[SND_FF_OUT_MIDI_PORTS][SND_FF_MAXIMIM_MIDI_QUADS];
  79         struct work_struct rx_midi_work[SND_FF_OUT_MIDI_PORTS];
  80         struct fw_transaction transactions[SND_FF_OUT_MIDI_PORTS];
  81         ktime_t next_ktime[SND_FF_OUT_MIDI_PORTS];
  82         bool rx_midi_error[SND_FF_OUT_MIDI_PORTS];
  83         unsigned int rx_bytes[SND_FF_OUT_MIDI_PORTS];
  84
  85         unsigned int substreams_counter;
  86         struct amdtp_stream tx_stream;
  87         struct amdtp_stream rx_stream;
  88         struct fw_iso_resources tx_resources;
  89         struct fw_iso_resources rx_resources;
  90
  91         int dev_lock_count;
  92         bool dev_lock_changed;
  93         wait_queue_head_t hwdep_wait;
  94
  95         struct amdtp_domain domain;
  96 };
  97
  98 enum snd_ff_clock_src {
  99         SND_FF_CLOCK_SRC_INTERNAL,
 100         SND_FF_CLOCK_SRC_SPDIF,
 101         SND_FF_CLOCK_SRC_ADAT1,
 102         SND_FF_CLOCK_SRC_ADAT2,
 103         SND_FF_CLOCK_SRC_WORD,
 104         SND_FF_CLOCK_SRC_LTC,
 105         /* TODO: perhaps TCO exists. */
 106 };
 107
 108 struct snd_ff_protocol {
 109         void (*handle_midi_msg)(struct snd_ff *ff, unsigned int offset,
 110                                 __le32 *buf, size_t length);
 111         int (*fill_midi_msg)(struct snd_ff *ff,
 112                              struct snd_rawmidi_substream *substream,
 113                              unsigned int port);
 114         int (*get_clock)(struct snd_ff *ff, unsigned int *rate,
 115                          enum snd_ff_clock_src *src);
 116         int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);
 117         int (*allocate_resources)(struct snd_ff *ff, unsigned int rate);
 118         int (*begin_session)(struct snd_ff *ff, unsigned int rate);
 119         void (*finish_session)(struct snd_ff *ff);
 120         void (*dump_status)(struct snd_ff *ff, struct snd_info_buffer *buffer);
 121 };
 122
 123 extern const struct snd_ff_protocol snd_ff_protocol_ff800;
 124 extern const struct snd_ff_protocol snd_ff_protocol_ff400;
 125 extern const struct snd_ff_protocol snd_ff_protocol_latter;
 126
 127 int snd_ff_transaction_register(struct snd_ff *ff);
 128 int snd_ff_transaction_reregister(struct snd_ff *ff);
 129 void snd_ff_transaction_unregister(struct snd_ff *ff);
 130
 131 int amdtp_ff_set_parameters(struct amdtp_stream *s, unsigned int rate,
 132                             unsigned int pcm_channels);
 133 int amdtp_ff_add_pcm_hw_constraints(struct amdtp_stream *s,
 134                                     struct snd_pcm_runtime *runtime);
 135 int amdtp_ff_init(struct amdtp_stream *s, struct fw_unit *unit,
 136                   enum amdtp_stream_direction dir);
 137
 138 int snd_ff_stream_get_multiplier_mode(enum cip_sfc sfc,
 139                                       enum snd_ff_stream_mode *mode);
 140 int snd_ff_stream_init_duplex(struct snd_ff *ff);
 141 void snd_ff_stream_destroy_duplex(struct snd_ff *ff);
 142 int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate,
 143                                  unsigned int frames_per_period,
 144                                  unsigned int frames_per_buffer);
 145 int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate);
 146 void snd_ff_stream_stop_duplex(struct snd_ff *ff);
 147 void snd_ff_stream_update_duplex(struct snd_ff *ff);
 148
 149 void snd_ff_stream_lock_changed(struct snd_ff *ff);
 150 int snd_ff_stream_lock_try(struct snd_ff *ff);
 151 void snd_ff_stream_lock_release(struct snd_ff *ff);
 152
 153 void snd_ff_proc_init(struct snd_ff *ff);
 154 const char *snd_ff_proc_get_clk_label(enum snd_ff_clock_src src);
 155
 156 int snd_ff_create_midi_devices(struct snd_ff *ff);
 157
 158 int snd_ff_create_pcm_devices(struct snd_ff *ff);
 159
 160 int snd_ff_create_hwdep_devices(struct snd_ff *ff);
 161
 162 #endif