1 /* 2 * TC Applied Technologies Digital Interface Communications Engine driver 3 * 4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de> 5 * Licensed under the terms of the GNU General Public License, version 2. 6 */ 7 8 #include "dice.h" 9 10 MODULE_DESCRIPTION("DICE driver"); 11 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); 12 MODULE_LICENSE("GPL v2"); 13 14 #define OUI_WEISS 0x001c6a 15 #define OUI_LOUD 0x000ff2 16 #define OUI_FOCUSRITE 0x00130e 17 #define OUI_TCELECTRONIC 0x001486 18 19 #define DICE_CATEGORY_ID 0x04 20 #define WEISS_CATEGORY_ID 0x00 21 #define LOUD_CATEGORY_ID 0x10 22 23 /* 24 * Some models support several isochronous channels, while these streams are not 25 * always available. In this case, add the model name to this list. 26 */ 27 static bool force_two_pcm_support(struct fw_unit *unit) 28 { 29 static const char *const models[] = { 30 /* TC Electronic models. */ 31 "StudioKonnekt48", 32 /* Focusrite models. */ 33 "SAFFIRE_PRO_40", 34 "LIQUID_SAFFIRE_56", 35 "SAFFIRE_PRO_40_1", 36 }; 37 char model[32]; 38 unsigned int i; 39 int err; 40 41 err = fw_csr_string(unit->directory, CSR_MODEL, model, sizeof(model)); 42 if (err < 0) 43 return false; 44 45 for (i = 0; i < ARRAY_SIZE(models); i++) { 46 if (strcmp(models[i], model) == 0) 47 break; 48 } 49 50 return i < ARRAY_SIZE(models); 51 } 52 53 static int check_dice_category(struct fw_unit *unit) 54 { 55 struct fw_device *device = fw_parent_device(unit); 56 struct fw_csr_iterator it; 57 int key, val, vendor = -1, model = -1; 58 unsigned int category; 59 60 /* 61 * Check that GUID and unit directory are constructed according to DICE 62 * rules, i.e., that the specifier ID is the GUID's OUI, and that the 63 * GUID chip ID consists of the 8-bit category ID, the 10-bit product 64 * ID, and a 22-bit serial number. 65 */ 66 fw_csr_iterator_init(&it, unit->directory); 67 while (fw_csr_iterator_next(&it, &key, &val)) { 68 switch (key) { 69 case CSR_SPECIFIER_ID: 70 vendor = val; 71 break; 72 case CSR_MODEL: 73 model = val; 74 break; 75 } 76 } 77 78 if (vendor == OUI_FOCUSRITE || vendor == OUI_TCELECTRONIC) { 79 if (force_two_pcm_support(unit)) 80 return 0; 81 } 82 83 if (vendor == OUI_WEISS) 84 category = WEISS_CATEGORY_ID; 85 else if (vendor == OUI_LOUD) 86 category = LOUD_CATEGORY_ID; 87 else 88 category = DICE_CATEGORY_ID; 89 if (device->config_rom[3] != ((vendor << 8) | category) || 90 device->config_rom[4] >> 22 != model) 91 return -ENODEV; 92 93 return 0; 94 } 95 96 static int check_clock_caps(struct snd_dice *dice) 97 { 98 __be32 value; 99 int err; 100 101 /* some very old firmwares don't tell about their clock support */ 102 if (dice->clock_caps > 0) { 103 err = snd_dice_transaction_read_global(dice, 104 GLOBAL_CLOCK_CAPABILITIES, 105 &value, 4); 106 if (err < 0) 107 return err; 108 dice->clock_caps = be32_to_cpu(value); 109 } else { 110 /* this should be supported by any device */ 111 dice->clock_caps = CLOCK_CAP_RATE_44100 | 112 CLOCK_CAP_RATE_48000 | 113 CLOCK_CAP_SOURCE_ARX1 | 114 CLOCK_CAP_SOURCE_INTERNAL; 115 } 116 117 return 0; 118 } 119 120 static void dice_card_strings(struct snd_dice *dice) 121 { 122 struct snd_card *card = dice->card; 123 struct fw_device *dev = fw_parent_device(dice->unit); 124 char vendor[32], model[32]; 125 unsigned int i; 126 int err; 127 128 strcpy(card->driver, "DICE"); 129 130 strcpy(card->shortname, "DICE"); 131 BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname)); 132 err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME, 133 card->shortname, 134 sizeof(card->shortname)); 135 if (err >= 0) { 136 /* DICE strings are returned in "always-wrong" endianness */ 137 BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0); 138 for (i = 0; i < sizeof(card->shortname); i += 4) 139 swab32s((u32 *)&card->shortname[i]); 140 card->shortname[sizeof(card->shortname) - 1] = '\0'; 141 } 142 143 strcpy(vendor, "?"); 144 fw_csr_string(dev->config_rom + 5, CSR_VENDOR, vendor, sizeof(vendor)); 145 strcpy(model, "?"); 146 fw_csr_string(dice->unit->directory, CSR_MODEL, model, sizeof(model)); 147 snprintf(card->longname, sizeof(card->longname), 148 "%s %s (serial %u) at %s, S%d", 149 vendor, model, dev->config_rom[4] & 0x3fffff, 150 dev_name(&dice->unit->device), 100 << dev->max_speed); 151 152 strcpy(card->mixername, "DICE"); 153 } 154 155 static void dice_free(struct snd_dice *dice) 156 { 157 snd_dice_stream_destroy_duplex(dice); 158 snd_dice_transaction_destroy(dice); 159 fw_unit_put(dice->unit); 160 161 mutex_destroy(&dice->mutex); 162 kfree(dice); 163 } 164 165 /* 166 * This module releases the FireWire unit data after all ALSA character devices 167 * are released by applications. This is for releasing stream data or finishing 168 * transactions safely. Thus at returning from .remove(), this module still keep 169 * references for the unit. 170 */ 171 static void dice_card_free(struct snd_card *card) 172 { 173 dice_free(card->private_data); 174 } 175 176 static void do_registration(struct work_struct *work) 177 { 178 struct snd_dice *dice = container_of(work, struct snd_dice, dwork.work); 179 int err; 180 181 if (dice->registered) 182 return; 183 184 err = snd_card_new(&dice->unit->device, -1, NULL, THIS_MODULE, 0, 185 &dice->card); 186 if (err < 0) 187 return; 188 189 if (force_two_pcm_support(dice->unit)) 190 dice->force_two_pcms = true; 191 192 err = snd_dice_transaction_init(dice); 193 if (err < 0) 194 goto error; 195 196 err = check_clock_caps(dice); 197 if (err < 0) 198 goto error; 199 200 dice_card_strings(dice); 201 202 err = snd_dice_stream_init_duplex(dice); 203 if (err < 0) 204 goto error; 205 206 snd_dice_create_proc(dice); 207 208 err = snd_dice_create_pcm(dice); 209 if (err < 0) 210 goto error; 211 212 err = snd_dice_create_midi(dice); 213 if (err < 0) 214 goto error; 215 216 err = snd_dice_create_hwdep(dice); 217 if (err < 0) 218 goto error; 219 220 err = snd_card_register(dice->card); 221 if (err < 0) 222 goto error; 223 224 /* 225 * After registered, dice instance can be released corresponding to 226 * releasing the sound card instance. 227 */ 228 dice->card->private_free = dice_card_free; 229 dice->card->private_data = dice; 230 dice->registered = true; 231 232 return; 233 error: 234 snd_dice_stream_destroy_duplex(dice); 235 snd_dice_transaction_destroy(dice); 236 snd_dice_stream_destroy_duplex(dice); 237 snd_card_free(dice->card); 238 dev_info(&dice->unit->device, 239 "Sound card registration failed: %d\n", err); 240 } 241 242 static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) 243 { 244 struct snd_dice *dice; 245 int err; 246 247 err = check_dice_category(unit); 248 if (err < 0) 249 return -ENODEV; 250 251 /* Allocate this independent of sound card instance. */ 252 dice = kzalloc(sizeof(struct snd_dice), GFP_KERNEL); 253 if (dice == NULL) 254 return -ENOMEM; 255 256 dice->unit = fw_unit_get(unit); 257 dev_set_drvdata(&unit->device, dice); 258 259 spin_lock_init(&dice->lock); 260 mutex_init(&dice->mutex); 261 init_completion(&dice->clock_accepted); 262 init_waitqueue_head(&dice->hwdep_wait); 263 264 /* Allocate and register this sound card later. */ 265 INIT_DEFERRABLE_WORK(&dice->dwork, do_registration); 266 snd_fw_schedule_registration(unit, &dice->dwork); 267 268 return 0; 269 } 270 271 static void dice_remove(struct fw_unit *unit) 272 { 273 struct snd_dice *dice = dev_get_drvdata(&unit->device); 274 275 /* 276 * Confirm to stop the work for registration before the sound card is 277 * going to be released. The work is not scheduled again because bus 278 * reset handler is not called anymore. 279 */ 280 cancel_delayed_work_sync(&dice->dwork); 281 282 if (dice->registered) { 283 /* No need to wait for releasing card object in this context. */ 284 snd_card_free_when_closed(dice->card); 285 } else { 286 /* Don't forget this case. */ 287 dice_free(dice); 288 } 289 } 290 291 static void dice_bus_reset(struct fw_unit *unit) 292 { 293 struct snd_dice *dice = dev_get_drvdata(&unit->device); 294 295 /* Postpone a workqueue for deferred registration. */ 296 if (!dice->registered) 297 snd_fw_schedule_registration(unit, &dice->dwork); 298 299 /* The handler address register becomes initialized. */ 300 snd_dice_transaction_reinit(dice); 301 302 /* 303 * After registration, userspace can start packet streaming, then this 304 * code block works fine. 305 */ 306 if (dice->registered) { 307 mutex_lock(&dice->mutex); 308 snd_dice_stream_update_duplex(dice); 309 mutex_unlock(&dice->mutex); 310 } 311 } 312 313 #define DICE_INTERFACE 0x000001 314 315 static const struct ieee1394_device_id dice_id_table[] = { 316 { 317 .match_flags = IEEE1394_MATCH_VERSION, 318 .version = DICE_INTERFACE, 319 }, 320 /* M-Audio Profire 610/2626 has a different value in version field. */ 321 { 322 .match_flags = IEEE1394_MATCH_VENDOR_ID | 323 IEEE1394_MATCH_SPECIFIER_ID, 324 .vendor_id = 0x000d6c, 325 .specifier_id = 0x000d6c, 326 }, 327 { } 328 }; 329 MODULE_DEVICE_TABLE(ieee1394, dice_id_table); 330 331 static struct fw_driver dice_driver = { 332 .driver = { 333 .owner = THIS_MODULE, 334 .name = KBUILD_MODNAME, 335 .bus = &fw_bus_type, 336 }, 337 .probe = dice_probe, 338 .update = dice_bus_reset, 339 .remove = dice_remove, 340 .id_table = dice_id_table, 341 }; 342 343 static int __init alsa_dice_init(void) 344 { 345 return driver_register(&dice_driver.driver); 346 } 347 348 static void __exit alsa_dice_exit(void) 349 { 350 driver_unregister(&dice_driver.driver); 351 } 352 353 module_init(alsa_dice_init); 354 module_exit(alsa_dice_exit); 355