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