sound/firewire/motu/motu.c

   1 /*
   2  * motu.c - a part of driver for MOTU FireWire series
   3  *
   4  * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "motu.h"
  10
  11 #define OUI_MOTU        0x0001f2
  12
  13 MODULE_DESCRIPTION("MOTU FireWire driver");
  14 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
  15 MODULE_LICENSE("GPL v2");
  16
  17 const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT] = {
  18         /* mode 0 */
  19         [0] =  44100,
  20         [1] =  48000,
  21         /* mode 1 */
  22         [2] =  88200,
  23         [3] =  96000,
  24         /* mode 2 */
  25         [4] = 176400,
  26         [5] = 192000,
  27 };
  28
  29 static void name_card(struct snd_motu *motu)
  30 {
  31         struct fw_device *fw_dev = fw_parent_device(motu->unit);
  32         struct fw_csr_iterator it;
  33         int key, val;
  34         u32 version = 0;
  35
  36         fw_csr_iterator_init(&it, motu->unit->directory);
  37         while (fw_csr_iterator_next(&it, &key, &val)) {
  38                 switch (key) {
  39                 case CSR_VERSION:
  40                         version = val;
  41                         break;
  42                 }
  43         }
  44
  45         strcpy(motu->card->driver, "FW-MOTU");
  46         strcpy(motu->card->shortname, motu->spec->name);
  47         strcpy(motu->card->mixername, motu->spec->name);
  48         snprintf(motu->card->longname, sizeof(motu->card->longname),
  49                  "MOTU %s (version:%d), GUID %08x%08x at %s, S%d",
  50                  motu->spec->name, version,
  51                  fw_dev->config_rom[3], fw_dev->config_rom[4],
  52                  dev_name(&motu->unit->device), 100 << fw_dev->max_speed);
  53 }
  54
  55 static void motu_free(struct snd_motu *motu)
  56 {
  57         snd_motu_transaction_unregister(motu);
  58
  59         snd_motu_stream_destroy_duplex(motu);
  60         fw_unit_put(motu->unit);
  61
  62         mutex_destroy(&motu->mutex);
  63         kfree(motu);
  64 }
  65
  66 /*
  67  * This module releases the FireWire unit data after all ALSA character devices
  68  * are released by applications. This is for releasing stream data or finishing
  69  * transactions safely. Thus at returning from .remove(), this module still keep
  70  * references for the unit.
  71  */
  72 static void motu_card_free(struct snd_card *card)
  73 {
  74         motu_free(card->private_data);
  75 }
  76
  77 static void do_registration(struct work_struct *work)
  78 {
  79         struct snd_motu *motu = container_of(work, struct snd_motu, dwork.work);
  80         int err;
  81
  82         if (motu->registered)
  83                 return;
  84
  85         err = snd_card_new(&motu->unit->device, -1, NULL, THIS_MODULE, 0,
  86                            &motu->card);
  87         if (err < 0)
  88                 return;
  89
  90         name_card(motu);
  91
  92         err = snd_motu_transaction_register(motu);
  93         if (err < 0)
  94                 goto error;
  95
  96         err = snd_motu_stream_init_duplex(motu);
  97         if (err < 0)
  98                 goto error;
  99
 100         snd_motu_proc_init(motu);
 101
 102         err = snd_motu_create_pcm_devices(motu);
 103         if (err < 0)
 104                 goto error;
 105
 106         if (motu->spec->flags & SND_MOTU_SPEC_HAS_MIDI) {
 107                 err = snd_motu_create_midi_devices(motu);
 108                 if (err < 0)
 109                         goto error;
 110         }
 111
 112         err = snd_motu_create_hwdep_device(motu);
 113         if (err < 0)
 114                 goto error;
 115
 116         err = snd_card_register(motu->card);
 117         if (err < 0)
 118                 goto error;
 119
 120         /*
 121          * After registered, motu instance can be released corresponding to
 122          * releasing the sound card instance.
 123          */
 124         motu->card->private_free = motu_card_free;
 125         motu->card->private_data = motu;
 126         motu->registered = true;
 127
 128         return;
 129 error:
 130         snd_motu_transaction_unregister(motu);
 131         snd_motu_stream_destroy_duplex(motu);
 132         snd_card_free(motu->card);
 133         dev_info(&motu->unit->device,
 134                  "Sound card registration failed: %d\n", err);
 135 }
 136
 137 static int motu_probe(struct fw_unit *unit,
 138                       const struct ieee1394_device_id *entry)
 139 {
 140         struct snd_motu *motu;
 141
 142         /* Allocate this independently of sound card instance. */
 143         motu = kzalloc(sizeof(struct snd_motu), GFP_KERNEL);
 144         if (motu == NULL)
 145                 return -ENOMEM;
 146
 147         motu->spec = (const struct snd_motu_spec *)entry->driver_data;
 148         motu->unit = fw_unit_get(unit);
 149         dev_set_drvdata(&unit->device, motu);
 150
 151         mutex_init(&motu->mutex);
 152         spin_lock_init(&motu->lock);
 153         init_waitqueue_head(&motu->hwdep_wait);
 154
 155         /* Allocate and register this sound card later. */
 156         INIT_DEFERRABLE_WORK(&motu->dwork, do_registration);
 157         snd_fw_schedule_registration(unit, &motu->dwork);
 158
 159         return 0;
 160 }
 161
 162 static void motu_remove(struct fw_unit *unit)
 163 {
 164         struct snd_motu *motu = dev_get_drvdata(&unit->device);
 165
 166         /*
 167          * Confirm to stop the work for registration before the sound card is
 168          * going to be released. The work is not scheduled again because bus
 169          * reset handler is not called anymore.
 170          */
 171         cancel_delayed_work_sync(&motu->dwork);
 172
 173         if (motu->registered) {
 174                 /* No need to wait for releasing card object in this context. */
 175                 snd_card_free_when_closed(motu->card);
 176         } else {
 177                 /* Don't forget this case. */
 178                 motu_free(motu);
 179         }
 180 }
 181
 182 static void motu_bus_update(struct fw_unit *unit)
 183 {
 184         struct snd_motu *motu = dev_get_drvdata(&unit->device);
 185
 186         /* Postpone a workqueue for deferred registration. */
 187         if (!motu->registered)
 188                 snd_fw_schedule_registration(unit, &motu->dwork);
 189
 190         /* The handler address register becomes initialized. */
 191         snd_motu_transaction_reregister(motu);
 192 }
 193
 194 static struct snd_motu_spec motu_828mk2 = {
 195         .name = "828mk2",
 196         .protocol = &snd_motu_protocol_v2,
 197         .flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 198                  SND_MOTU_SPEC_TX_MICINST_CHUNK |
 199                  SND_MOTU_SPEC_TX_RETURN_CHUNK |
 200                  SND_MOTU_SPEC_HAS_OPT_IFACE_A |
 201                  SND_MOTU_SPEC_HAS_MIDI,
 202
 203         .analog_in_ports = 8,
 204         .analog_out_ports = 8,
 205 };
 206
 207 static struct snd_motu_spec motu_828mk3 = {
 208         .name = "828mk3",
 209         .protocol = &snd_motu_protocol_v3,
 210         .flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 211                  SND_MOTU_SPEC_SUPPORT_CLOCK_X4 |
 212                  SND_MOTU_SPEC_TX_MICINST_CHUNK |
 213                  SND_MOTU_SPEC_TX_RETURN_CHUNK |
 214                  SND_MOTU_SPEC_TX_REVERB_CHUNK |
 215                  SND_MOTU_SPEC_HAS_OPT_IFACE_A |
 216                  SND_MOTU_SPEC_HAS_OPT_IFACE_B |
 217                  SND_MOTU_SPEC_HAS_MIDI,
 218
 219         .analog_in_ports = 8,
 220         .analog_out_ports = 8,
 221 };
 222
 223 #define SND_MOTU_DEV_ENTRY(model, data)                 \
 224 {                                                       \
 225         .match_flags    = IEEE1394_MATCH_VENDOR_ID |    \
 226                           IEEE1394_MATCH_MODEL_ID |     \
 227                           IEEE1394_MATCH_SPECIFIER_ID,  \
 228         .vendor_id      = OUI_MOTU,                     \
 229         .model_id       = model,                        \
 230         .specifier_id   = OUI_MOTU,                     \
 231         .driver_data    = (kernel_ulong_t)data,         \
 232 }
 233
 234 static const struct ieee1394_device_id motu_id_table[] = {
 235         SND_MOTU_DEV_ENTRY(0x101800, &motu_828mk2),
 236         SND_MOTU_DEV_ENTRY(0x106800, &motu_828mk3),     /* FireWire only. */
 237         SND_MOTU_DEV_ENTRY(0x100800, &motu_828mk3),     /* Hybrid. */
 238         { }
 239 };
 240 MODULE_DEVICE_TABLE(ieee1394, motu_id_table);
 241
 242 static struct fw_driver motu_driver = {
 243         .driver   = {
 244                 .owner  = THIS_MODULE,
 245                 .name   = KBUILD_MODNAME,
 246                 .bus    = &fw_bus_type,
 247         },
 248         .probe    = motu_probe,
 249         .update   = motu_bus_update,
 250         .remove   = motu_remove,
 251         .id_table = motu_id_table,
 252 };
 253
 254 static int __init alsa_motu_init(void)
 255 {
 256         return driver_register(&motu_driver.driver);
 257 }
 258
 259 static void __exit alsa_motu_exit(void)
 260 {
 261         driver_unregister(&motu_driver.driver);
 262 }
 263
 264 module_init(alsa_motu_init);
 265 module_exit(alsa_motu_exit);