1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * motu.c - a part of driver for MOTU FireWire series 4 * 5 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp> 6 */ 7 8 #include "motu.h" 9 10 #define OUI_MOTU 0x0001f2 11 12 MODULE_DESCRIPTION("MOTU FireWire driver"); 13 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>"); 14 MODULE_LICENSE("GPL v2"); 15 16 const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT] = { 17 /* mode 0 */ 18 [0] = 44100, 19 [1] = 48000, 20 /* mode 1 */ 21 [2] = 88200, 22 [3] = 96000, 23 /* mode 2 */ 24 [4] = 176400, 25 [5] = 192000, 26 }; 27 28 static void name_card(struct snd_motu *motu) 29 { 30 struct fw_device *fw_dev = fw_parent_device(motu->unit); 31 struct fw_csr_iterator it; 32 int key, val; 33 u32 version = 0; 34 35 fw_csr_iterator_init(&it, motu->unit->directory); 36 while (fw_csr_iterator_next(&it, &key, &val)) { 37 switch (key) { 38 case CSR_MODEL: 39 version = val; 40 break; 41 } 42 } 43 44 strcpy(motu->card->driver, "FW-MOTU"); 45 strcpy(motu->card->shortname, motu->spec->name); 46 strcpy(motu->card->mixername, motu->spec->name); 47 snprintf(motu->card->longname, sizeof(motu->card->longname), 48 "MOTU %s (version:%06x), GUID %08x%08x at %s, S%d", 49 motu->spec->name, version, 50 fw_dev->config_rom[3], fw_dev->config_rom[4], 51 dev_name(&motu->unit->device), 100 << fw_dev->max_speed); 52 } 53 54 static void motu_card_free(struct snd_card *card) 55 { 56 struct snd_motu *motu = card->private_data; 57 58 snd_motu_transaction_unregister(motu); 59 snd_motu_stream_destroy_duplex(motu); 60 } 61 62 static void do_registration(struct work_struct *work) 63 { 64 struct snd_motu *motu = container_of(work, struct snd_motu, dwork.work); 65 int err; 66 67 if (motu->registered) 68 return; 69 70 err = snd_card_new(&motu->unit->device, -1, NULL, THIS_MODULE, 0, 71 &motu->card); 72 if (err < 0) 73 return; 74 motu->card->private_free = motu_card_free; 75 motu->card->private_data = motu; 76 77 name_card(motu); 78 79 err = snd_motu_transaction_register(motu); 80 if (err < 0) 81 goto error; 82 83 err = snd_motu_stream_init_duplex(motu); 84 if (err < 0) 85 goto error; 86 87 snd_motu_proc_init(motu); 88 89 err = snd_motu_create_pcm_devices(motu); 90 if (err < 0) 91 goto error; 92 93 if ((motu->spec->flags & SND_MOTU_SPEC_RX_MIDI_2ND_Q) || 94 (motu->spec->flags & SND_MOTU_SPEC_RX_MIDI_3RD_Q) || 95 (motu->spec->flags & SND_MOTU_SPEC_TX_MIDI_2ND_Q) || 96 (motu->spec->flags & SND_MOTU_SPEC_TX_MIDI_3RD_Q)) { 97 err = snd_motu_create_midi_devices(motu); 98 if (err < 0) 99 goto error; 100 } 101 102 err = snd_motu_create_hwdep_device(motu); 103 if (err < 0) 104 goto error; 105 106 err = snd_card_register(motu->card); 107 if (err < 0) 108 goto error; 109 110 motu->registered = true; 111 112 return; 113 error: 114 snd_card_free(motu->card); 115 dev_info(&motu->unit->device, 116 "Sound card registration failed: %d\n", err); 117 } 118 119 static int motu_probe(struct fw_unit *unit, 120 const struct ieee1394_device_id *entry) 121 { 122 struct snd_motu *motu; 123 124 /* Allocate this independently of sound card instance. */ 125 motu = devm_kzalloc(&unit->device, sizeof(struct snd_motu), GFP_KERNEL); 126 if (!motu) 127 return -ENOMEM; 128 motu->unit = fw_unit_get(unit); 129 dev_set_drvdata(&unit->device, motu); 130 131 motu->spec = (const struct snd_motu_spec *)entry->driver_data; 132 mutex_init(&motu->mutex); 133 spin_lock_init(&motu->lock); 134 init_waitqueue_head(&motu->hwdep_wait); 135 136 /* Allocate and register this sound card later. */ 137 INIT_DEFERRABLE_WORK(&motu->dwork, do_registration); 138 snd_fw_schedule_registration(unit, &motu->dwork); 139 140 return 0; 141 } 142 143 static void motu_remove(struct fw_unit *unit) 144 { 145 struct snd_motu *motu = dev_get_drvdata(&unit->device); 146 147 /* 148 * Confirm to stop the work for registration before the sound card is 149 * going to be released. The work is not scheduled again because bus 150 * reset handler is not called anymore. 151 */ 152 cancel_delayed_work_sync(&motu->dwork); 153 154 if (motu->registered) { 155 // Block till all of ALSA character devices are released. 156 snd_card_free(motu->card); 157 } 158 159 mutex_destroy(&motu->mutex); 160 fw_unit_put(motu->unit); 161 } 162 163 static void motu_bus_update(struct fw_unit *unit) 164 { 165 struct snd_motu *motu = dev_get_drvdata(&unit->device); 166 167 /* Postpone a workqueue for deferred registration. */ 168 if (!motu->registered) 169 snd_fw_schedule_registration(unit, &motu->dwork); 170 171 /* The handler address register becomes initialized. */ 172 snd_motu_transaction_reregister(motu); 173 } 174 175 #define SND_MOTU_DEV_ENTRY(model, data) \ 176 { \ 177 .match_flags = IEEE1394_MATCH_VENDOR_ID | \ 178 IEEE1394_MATCH_SPECIFIER_ID | \ 179 IEEE1394_MATCH_VERSION, \ 180 .vendor_id = OUI_MOTU, \ 181 .specifier_id = OUI_MOTU, \ 182 .version = model, \ 183 .driver_data = (kernel_ulong_t)data, \ 184 } 185 186 static const struct ieee1394_device_id motu_id_table[] = { 187 SND_MOTU_DEV_ENTRY(0x000003, &snd_motu_spec_828mk2), 188 SND_MOTU_DEV_ENTRY(0x000009, &snd_motu_spec_traveler), 189 SND_MOTU_DEV_ENTRY(0x00000d, &snd_motu_spec_ultralite), 190 SND_MOTU_DEV_ENTRY(0x00000f, &snd_motu_spec_8pre), 191 SND_MOTU_DEV_ENTRY(0x000015, &snd_motu_spec_828mk3), // FireWire only. 192 SND_MOTU_DEV_ENTRY(0x000019, &snd_motu_spec_ultralite_mk3), // FireWire only. 193 SND_MOTU_DEV_ENTRY(0x000035, &snd_motu_spec_828mk3), // Hybrid. 194 SND_MOTU_DEV_ENTRY(0x000033, &snd_motu_spec_audio_express), 195 SND_MOTU_DEV_ENTRY(0x000045, &snd_motu_spec_4pre), 196 { } 197 }; 198 MODULE_DEVICE_TABLE(ieee1394, motu_id_table); 199 200 static struct fw_driver motu_driver = { 201 .driver = { 202 .owner = THIS_MODULE, 203 .name = KBUILD_MODNAME, 204 .bus = &fw_bus_type, 205 }, 206 .probe = motu_probe, 207 .update = motu_bus_update, 208 .remove = motu_remove, 209 .id_table = motu_id_table, 210 }; 211 212 static int __init alsa_motu_init(void) 213 { 214 return driver_register(&motu_driver.driver); 215 } 216 217 static void __exit alsa_motu_exit(void) 218 { 219 driver_unregister(&motu_driver.driver); 220 } 221 222 module_init(alsa_motu_init); 223 module_exit(alsa_motu_exit); 224