sound/firewire/tascam/tascam.c

   1 /*
   2  * tascam.c - a part of driver for TASCAM FireWire series
   3  *
   4  * Copyright (c) 2015 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "tascam.h"
  10
  11 MODULE_DESCRIPTION("TASCAM FireWire series Driver");
  12 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
  13 MODULE_LICENSE("GPL v2");
  14
  15 static struct snd_tscm_spec model_specs[] = {
  16         {
  17                 .name = "FW-1884",
  18                 .has_adat = true,
  19                 .has_spdif = true,
  20                 .pcm_capture_analog_channels = 8,
  21                 .pcm_playback_analog_channels = 8,
  22                 .midi_capture_ports = 4,
  23                 .midi_playback_ports = 4,
  24         },
  25         {
  26                 .name = "FW-1082",
  27                 .has_adat = false,
  28                 .has_spdif = true,
  29                 .pcm_capture_analog_channels = 8,
  30                 .pcm_playback_analog_channels = 2,
  31                 .midi_capture_ports = 2,
  32                 .midi_playback_ports = 2,
  33         },
  34         {
  35                 .name = "FW-1804",
  36                 .has_adat = true,
  37                 .has_spdif = true,
  38                 .pcm_capture_analog_channels = 8,
  39                 .pcm_playback_analog_channels = 2,
  40                 .midi_capture_ports = 2,
  41                 .midi_playback_ports = 4,
  42         },
  43 };
  44
  45 static int identify_model(struct snd_tscm *tscm)
  46 {
  47         struct fw_device *fw_dev = fw_parent_device(tscm->unit);
  48         const u32 *config_rom = fw_dev->config_rom;
  49         char model[9];
  50         unsigned int i;
  51         u8 c;
  52
  53         if (fw_dev->config_rom_length < 30) {
  54                 dev_err(&tscm->unit->device,
  55                         "Configuration ROM is too short.\n");
  56                 return -ENODEV;
  57         }
  58
  59         /* Pick up model name from certain addresses. */
  60         for (i = 0; i < 8; i++) {
  61                 c = config_rom[28 + i / 4] >> (24 - 8 * (i % 4));
  62                 if (c == '\0')
  63                         break;
  64                 model[i] = c;
  65         }
  66         model[i] = '\0';
  67
  68         for (i = 0; i < ARRAY_SIZE(model_specs); i++) {
  69                 if (strcmp(model, model_specs[i].name) == 0) {
  70                         tscm->spec = &model_specs[i];
  71                         break;
  72                 }
  73         }
  74         if (tscm->spec == NULL)
  75                 return -ENODEV;
  76
  77         strcpy(tscm->card->driver, "FW-TASCAM");
  78         strcpy(tscm->card->shortname, model);
  79         strcpy(tscm->card->mixername, model);
  80         snprintf(tscm->card->longname, sizeof(tscm->card->longname),
  81                  "TASCAM %s, GUID %08x%08x at %s, S%d", model,
  82                  fw_dev->config_rom[3], fw_dev->config_rom[4],
  83                  dev_name(&tscm->unit->device), 100 << fw_dev->max_speed);
  84
  85         return 0;
  86 }
  87
  88 static void tscm_card_free(struct snd_card *card)
  89 {
  90         struct snd_tscm *tscm = card->private_data;
  91
  92         snd_tscm_transaction_unregister(tscm);
  93         snd_tscm_stream_destroy_duplex(tscm);
  94
  95         fw_unit_put(tscm->unit);
  96
  97         mutex_destroy(&tscm->mutex);
  98 }
  99
 100 static int snd_tscm_probe(struct fw_unit *unit,
 101                            const struct ieee1394_device_id *entry)
 102 {
 103         struct snd_card *card;
 104         struct snd_tscm *tscm;
 105         int err;
 106
 107         /* create card */
 108         err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE,
 109                            sizeof(struct snd_tscm), &card);
 110         if (err < 0)
 111                 return err;
 112         card->private_free = tscm_card_free;
 113
 114         /* initialize myself */
 115         tscm = card->private_data;
 116         tscm->card = card;
 117         tscm->unit = fw_unit_get(unit);
 118
 119         mutex_init(&tscm->mutex);
 120         spin_lock_init(&tscm->lock);
 121         init_waitqueue_head(&tscm->hwdep_wait);
 122
 123         err = identify_model(tscm);
 124         if (err < 0)
 125                 goto error;
 126
 127         snd_tscm_proc_init(tscm);
 128
 129         err = snd_tscm_stream_init_duplex(tscm);
 130         if (err < 0)
 131                 goto error;
 132
 133         err = snd_tscm_create_pcm_devices(tscm);
 134         if (err < 0)
 135                 goto error;
 136
 137         err = snd_tscm_transaction_register(tscm);
 138         if (err < 0)
 139                 goto error;
 140
 141         err = snd_tscm_create_midi_devices(tscm);
 142         if (err < 0)
 143                 goto error;
 144
 145         err = snd_tscm_create_hwdep_device(tscm);
 146         if (err < 0)
 147                 goto error;
 148
 149         err = snd_card_register(card);
 150         if (err < 0)
 151                 goto error;
 152
 153         dev_set_drvdata(&unit->device, tscm);
 154
 155         return err;
 156 error:
 157         snd_card_free(card);
 158         return err;
 159 }
 160
 161 static void snd_tscm_update(struct fw_unit *unit)
 162 {
 163         struct snd_tscm *tscm = dev_get_drvdata(&unit->device);
 164
 165         snd_tscm_transaction_reregister(tscm);
 166
 167         mutex_lock(&tscm->mutex);
 168         snd_tscm_stream_update_duplex(tscm);
 169         mutex_unlock(&tscm->mutex);
 170 }
 171
 172 static void snd_tscm_remove(struct fw_unit *unit)
 173 {
 174         struct snd_tscm *tscm = dev_get_drvdata(&unit->device);
 175
 176         /* No need to wait for releasing card object in this context. */
 177         snd_card_free_when_closed(tscm->card);
 178 }
 179
 180 static const struct ieee1394_device_id snd_tscm_id_table[] = {
 181         {
 182                 .match_flags = IEEE1394_MATCH_VENDOR_ID |
 183                                IEEE1394_MATCH_SPECIFIER_ID,
 184                 .vendor_id = 0x00022e,
 185                 .specifier_id = 0x00022e,
 186         },
 187         /* FE-08 requires reverse-engineering because it just has faders. */
 188         {}
 189 };
 190 MODULE_DEVICE_TABLE(ieee1394, snd_tscm_id_table);
 191
 192 static struct fw_driver tscm_driver = {
 193         .driver = {
 194                 .owner = THIS_MODULE,
 195                 .name = "snd-firewire-tascam",
 196                 .bus = &fw_bus_type,
 197         },
 198         .probe    = snd_tscm_probe,
 199         .update   = snd_tscm_update,
 200         .remove   = snd_tscm_remove,
 201         .id_table = snd_tscm_id_table,
 202 };
 203
 204 static int __init snd_tscm_init(void)
 205 {
 206         return driver_register(&tscm_driver.driver);
 207 }
 208
 209 static void __exit snd_tscm_exit(void)
 210 {
 211         driver_unregister(&tscm_driver.driver);
 212 }
 213
 214 module_init(snd_tscm_init);
 215 module_exit(snd_tscm_exit);