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Linux/sound/firewire/motu/motu.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  * motu.h - a part of driver for MOTU FireWire series
  4  *
  5  * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
  6  */
  7 
  8 #ifndef SOUND_FIREWIRE_MOTU_H_INCLUDED
  9 #define SOUND_FIREWIRE_MOTU_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/control.h>
 22 #include <sound/core.h>
 23 #include <sound/pcm.h>
 24 #include <sound/info.h>
 25 #include <sound/rawmidi.h>
 26 #include <sound/firewire.h>
 27 #include <sound/hwdep.h>
 28 
 29 #include "../lib.h"
 30 #include "../amdtp-stream.h"
 31 #include "../iso-resources.h"
 32 
 33 struct snd_motu_packet_format {
 34         unsigned char midi_flag_offset;
 35         unsigned char midi_byte_offset;
 36         unsigned char pcm_byte_offset;
 37 
 38         unsigned char msg_chunks;
 39         unsigned char fixed_part_pcm_chunks[3];
 40         unsigned char differed_part_pcm_chunks[3];
 41 };
 42 
 43 struct snd_motu {
 44         struct snd_card *card;
 45         struct fw_unit *unit;
 46         struct mutex mutex;
 47         spinlock_t lock;
 48 
 49         bool registered;
 50         struct delayed_work dwork;
 51 
 52         /* Model dependent information. */
 53         const struct snd_motu_spec *spec;
 54 
 55         /* For packet streaming */
 56         struct snd_motu_packet_format tx_packet_formats;
 57         struct snd_motu_packet_format rx_packet_formats;
 58         struct amdtp_stream tx_stream;
 59         struct amdtp_stream rx_stream;
 60         struct fw_iso_resources tx_resources;
 61         struct fw_iso_resources rx_resources;
 62         unsigned int substreams_counter;
 63 
 64         /* For notification. */
 65         struct fw_address_handler async_handler;
 66         u32 msg;
 67 
 68         /* For uapi */
 69         int dev_lock_count;
 70         bool dev_lock_changed;
 71         wait_queue_head_t hwdep_wait;
 72 
 73         struct amdtp_domain domain;
 74 };
 75 
 76 enum snd_motu_spec_flags {
 77         SND_MOTU_SPEC_SUPPORT_CLOCK_X2  = 0x0001,
 78         SND_MOTU_SPEC_SUPPORT_CLOCK_X4  = 0x0002,
 79         SND_MOTU_SPEC_TX_MICINST_CHUNK  = 0x0004,
 80         SND_MOTU_SPEC_TX_RETURN_CHUNK   = 0x0008,
 81         SND_MOTU_SPEC_TX_REVERB_CHUNK   = 0x0010,
 82         SND_MOTU_SPEC_HAS_AESEBU_IFACE  = 0x0020,
 83         SND_MOTU_SPEC_HAS_OPT_IFACE_A   = 0x0040,
 84         SND_MOTU_SPEC_HAS_OPT_IFACE_B   = 0x0080,
 85         SND_MOTU_SPEC_RX_MIDI_2ND_Q     = 0x0100,
 86         SND_MOTU_SPEC_RX_MIDI_3RD_Q     = 0x0200,
 87         SND_MOTU_SPEC_TX_MIDI_2ND_Q     = 0x0400,
 88         SND_MOTU_SPEC_TX_MIDI_3RD_Q     = 0x0800,
 89         SND_MOTU_SPEC_RX_SEPARATED_MAIN = 0x1000,
 90 };
 91 
 92 #define SND_MOTU_CLOCK_RATE_COUNT       6
 93 extern const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT];
 94 
 95 enum snd_motu_clock_source {
 96         SND_MOTU_CLOCK_SOURCE_INTERNAL,
 97         SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB,
 98         SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT,
 99         SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A,
100         SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B,
101         SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT,
102         SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A,
103         SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B,
104         SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX,
105         SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR,
106         SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC,
107         SND_MOTU_CLOCK_SOURCE_SPH,
108         SND_MOTU_CLOCK_SOURCE_UNKNOWN,
109 };
110 
111 struct snd_motu_protocol {
112         int (*get_clock_rate)(struct snd_motu *motu, unsigned int *rate);
113         int (*set_clock_rate)(struct snd_motu *motu, unsigned int rate);
114         int (*get_clock_source)(struct snd_motu *motu,
115                                 enum snd_motu_clock_source *source);
116         int (*switch_fetching_mode)(struct snd_motu *motu, bool enable);
117         int (*cache_packet_formats)(struct snd_motu *motu);
118 };
119 
120 struct snd_motu_spec {
121         const char *const name;
122         enum snd_motu_spec_flags flags;
123 
124         unsigned char analog_in_ports;
125         unsigned char analog_out_ports;
126 
127         const struct snd_motu_protocol *const protocol;
128 };
129 
130 extern const struct snd_motu_protocol snd_motu_protocol_v2;
131 extern const struct snd_motu_protocol snd_motu_protocol_v3;
132 
133 extern const struct snd_motu_spec snd_motu_spec_828mk2;
134 
135 int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
136                     enum amdtp_stream_direction dir,
137                     const struct snd_motu_protocol *const protocol);
138 int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
139                               unsigned int midi_ports,
140                               struct snd_motu_packet_format *formats);
141 int amdtp_motu_add_pcm_hw_constraints(struct amdtp_stream *s,
142                                       struct snd_pcm_runtime *runtime);
143 void amdtp_motu_midi_trigger(struct amdtp_stream *s, unsigned int port,
144                              struct snd_rawmidi_substream *midi);
145 
146 int snd_motu_transaction_read(struct snd_motu *motu, u32 offset, __be32 *reg,
147                               size_t size);
148 int snd_motu_transaction_write(struct snd_motu *motu, u32 offset, __be32 *reg,
149                                size_t size);
150 int snd_motu_transaction_register(struct snd_motu *motu);
151 int snd_motu_transaction_reregister(struct snd_motu *motu);
152 void snd_motu_transaction_unregister(struct snd_motu *motu);
153 
154 int snd_motu_stream_init_duplex(struct snd_motu *motu);
155 void snd_motu_stream_destroy_duplex(struct snd_motu *motu);
156 int snd_motu_stream_cache_packet_formats(struct snd_motu *motu);
157 int snd_motu_stream_reserve_duplex(struct snd_motu *motu, unsigned int rate,
158                                    unsigned int frames_per_period,
159                                    unsigned int frames_per_buffer);
160 int snd_motu_stream_start_duplex(struct snd_motu *motu);
161 void snd_motu_stream_stop_duplex(struct snd_motu *motu);
162 int snd_motu_stream_lock_try(struct snd_motu *motu);
163 void snd_motu_stream_lock_release(struct snd_motu *motu);
164 
165 void snd_motu_proc_init(struct snd_motu *motu);
166 
167 int snd_motu_create_pcm_devices(struct snd_motu *motu);
168 
169 int snd_motu_create_midi_devices(struct snd_motu *motu);
170 
171 int snd_motu_create_hwdep_device(struct snd_motu *motu);
172 #endif
173 

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