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 pcm_chunks[3]; 40 }; 41 42 struct amdtp_motu_cache { 43 unsigned int *event_offsets; 44 unsigned int size; 45 unsigned int tail; 46 unsigned int tx_cycle_count; 47 unsigned int head; 48 unsigned int rx_cycle_count; 49 }; 50 51 struct snd_motu { 52 struct snd_card *card; 53 struct fw_unit *unit; 54 struct mutex mutex; 55 spinlock_t lock; 56 57 /* Model dependent information. */ 58 const struct snd_motu_spec *spec; 59 60 /* For packet streaming */ 61 struct snd_motu_packet_format tx_packet_formats; 62 struct snd_motu_packet_format rx_packet_formats; 63 struct amdtp_stream tx_stream; 64 struct amdtp_stream rx_stream; 65 struct fw_iso_resources tx_resources; 66 struct fw_iso_resources rx_resources; 67 unsigned int substreams_counter; 68 69 /* For notification. */ 70 struct fw_address_handler async_handler; 71 u32 msg; 72 73 /* For uapi */ 74 int dev_lock_count; 75 bool dev_lock_changed; 76 wait_queue_head_t hwdep_wait; 77 78 struct amdtp_domain domain; 79 80 struct amdtp_motu_cache cache; 81 }; 82 83 enum snd_motu_spec_flags { 84 SND_MOTU_SPEC_RX_MIDI_2ND_Q = 0x0001, 85 SND_MOTU_SPEC_RX_MIDI_3RD_Q = 0x0002, 86 SND_MOTU_SPEC_TX_MIDI_2ND_Q = 0x0004, 87 SND_MOTU_SPEC_TX_MIDI_3RD_Q = 0x0008, 88 }; 89 90 #define SND_MOTU_CLOCK_RATE_COUNT 6 91 extern const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT]; 92 93 enum snd_motu_clock_source { 94 SND_MOTU_CLOCK_SOURCE_INTERNAL, 95 SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB, 96 SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT, 97 SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A, 98 SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B, 99 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT, 100 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A, 101 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B, 102 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX, 103 SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR, 104 SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC, 105 SND_MOTU_CLOCK_SOURCE_SPH, 106 SND_MOTU_CLOCK_SOURCE_UNKNOWN, 107 }; 108 109 enum snd_motu_protocol_version { 110 SND_MOTU_PROTOCOL_V2, 111 SND_MOTU_PROTOCOL_V3, 112 }; 113 114 struct snd_motu_spec { 115 const char *const name; 116 enum snd_motu_protocol_version protocol_version; 117 // The combination of snd_motu_spec_flags enumeration-constants. 118 unsigned int flags; 119 120 unsigned char tx_fixed_pcm_chunks[3]; 121 unsigned char rx_fixed_pcm_chunks[3]; 122 }; 123 124 extern const struct snd_motu_spec snd_motu_spec_828mk2; 125 extern const struct snd_motu_spec snd_motu_spec_traveler; 126 extern const struct snd_motu_spec snd_motu_spec_ultralite; 127 extern const struct snd_motu_spec snd_motu_spec_8pre; 128 129 extern const struct snd_motu_spec snd_motu_spec_828mk3; 130 extern const struct snd_motu_spec snd_motu_spec_ultralite_mk3; 131 extern const struct snd_motu_spec snd_motu_spec_audio_express; 132 extern const struct snd_motu_spec snd_motu_spec_4pre; 133 134 int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit, 135 enum amdtp_stream_direction dir, 136 const struct snd_motu_spec *spec, 137 struct amdtp_motu_cache *cache); 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); 172 173 int snd_motu_protocol_v2_get_clock_rate(struct snd_motu *motu, 174 unsigned int *rate); 175 int snd_motu_protocol_v2_set_clock_rate(struct snd_motu *motu, 176 unsigned int rate); 177 int snd_motu_protocol_v2_get_clock_source(struct snd_motu *motu, 178 enum snd_motu_clock_source *src); 179 int snd_motu_protocol_v2_switch_fetching_mode(struct snd_motu *motu, 180 bool enable); 181 int snd_motu_protocol_v2_cache_packet_formats(struct snd_motu *motu); 182 183 int snd_motu_protocol_v3_get_clock_rate(struct snd_motu *motu, 184 unsigned int *rate); 185 int snd_motu_protocol_v3_set_clock_rate(struct snd_motu *motu, 186 unsigned int rate); 187 int snd_motu_protocol_v3_get_clock_source(struct snd_motu *motu, 188 enum snd_motu_clock_source *src); 189 int snd_motu_protocol_v3_switch_fetching_mode(struct snd_motu *motu, 190 bool enable); 191 int snd_motu_protocol_v3_cache_packet_formats(struct snd_motu *motu); 192 193 static inline int snd_motu_protocol_get_clock_rate(struct snd_motu *motu, 194 unsigned int *rate) 195 { 196 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2) 197 return snd_motu_protocol_v2_get_clock_rate(motu, rate); 198 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3) 199 return snd_motu_protocol_v3_get_clock_rate(motu, rate); 200 else 201 return -ENXIO; 202 } 203 204 static inline int snd_motu_protocol_set_clock_rate(struct snd_motu *motu, 205 unsigned int rate) 206 { 207 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2) 208 return snd_motu_protocol_v2_set_clock_rate(motu, rate); 209 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3) 210 return snd_motu_protocol_v3_set_clock_rate(motu, rate); 211 else 212 return -ENXIO; 213 } 214 215 static inline int snd_motu_protocol_get_clock_source(struct snd_motu *motu, 216 enum snd_motu_clock_source *source) 217 { 218 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2) 219 return snd_motu_protocol_v2_get_clock_source(motu, source); 220 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3) 221 return snd_motu_protocol_v3_get_clock_source(motu, source); 222 else 223 return -ENXIO; 224 } 225 226 static inline int snd_motu_protocol_switch_fetching_mode(struct snd_motu *motu, 227 bool enable) 228 { 229 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2) 230 return snd_motu_protocol_v2_switch_fetching_mode(motu, enable); 231 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3) 232 return snd_motu_protocol_v3_switch_fetching_mode(motu, enable); 233 else 234 return -ENXIO; 235 } 236 237 static inline int snd_motu_protocol_cache_packet_formats(struct snd_motu *motu) 238 { 239 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2) 240 return snd_motu_protocol_v2_cache_packet_formats(motu); 241 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3) 242 return snd_motu_protocol_v3_cache_packet_formats(motu); 243 else 244 return -ENXIO; 245 } 246 247 #endif 248