1 /* 2 * digi00x.c - a part of driver for Digidesign Digi 002/003 family 3 * 4 * Copyright (c) 2014-2015 Takashi Sakamoto 5 * 6 * Licensed under the terms of the GNU General Public License, version 2. 7 */ 8 9 #include "digi00x.h" 10 11 MODULE_DESCRIPTION("Digidesign Digi 002/003 family Driver"); 12 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>"); 13 MODULE_LICENSE("GPL v2"); 14 15 #define VENDOR_DIGIDESIGN 0x00a07e 16 #define MODEL_CONSOLE 0x000001 17 #define MODEL_RACK 0x000002 18 19 static int name_card(struct snd_dg00x *dg00x) 20 { 21 struct fw_device *fw_dev = fw_parent_device(dg00x->unit); 22 char name[32] = {0}; 23 char *model; 24 int err; 25 26 err = fw_csr_string(dg00x->unit->directory, CSR_MODEL, name, 27 sizeof(name)); 28 if (err < 0) 29 return err; 30 31 model = skip_spaces(name); 32 33 strcpy(dg00x->card->driver, "Digi00x"); 34 strcpy(dg00x->card->shortname, model); 35 strcpy(dg00x->card->mixername, model); 36 snprintf(dg00x->card->longname, sizeof(dg00x->card->longname), 37 "Digidesign %s, GUID %08x%08x at %s, S%d", model, 38 fw_dev->config_rom[3], fw_dev->config_rom[4], 39 dev_name(&dg00x->unit->device), 100 << fw_dev->max_speed); 40 41 return 0; 42 } 43 44 static void dg00x_free(struct snd_dg00x *dg00x) 45 { 46 snd_dg00x_stream_destroy_duplex(dg00x); 47 snd_dg00x_transaction_unregister(dg00x); 48 49 fw_unit_put(dg00x->unit); 50 51 mutex_destroy(&dg00x->mutex); 52 kfree(dg00x); 53 } 54 55 static void dg00x_card_free(struct snd_card *card) 56 { 57 dg00x_free(card->private_data); 58 } 59 60 static void do_registration(struct work_struct *work) 61 { 62 struct snd_dg00x *dg00x = 63 container_of(work, struct snd_dg00x, dwork.work); 64 int err; 65 66 if (dg00x->registered) 67 return; 68 69 err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0, 70 &dg00x->card); 71 if (err < 0) 72 return; 73 74 err = name_card(dg00x); 75 if (err < 0) 76 goto error; 77 78 err = snd_dg00x_stream_init_duplex(dg00x); 79 if (err < 0) 80 goto error; 81 82 snd_dg00x_proc_init(dg00x); 83 84 err = snd_dg00x_create_pcm_devices(dg00x); 85 if (err < 0) 86 goto error; 87 88 err = snd_dg00x_create_midi_devices(dg00x); 89 if (err < 0) 90 goto error; 91 92 err = snd_dg00x_create_hwdep_device(dg00x); 93 if (err < 0) 94 goto error; 95 96 err = snd_dg00x_transaction_register(dg00x); 97 if (err < 0) 98 goto error; 99 100 err = snd_card_register(dg00x->card); 101 if (err < 0) 102 goto error; 103 104 dg00x->card->private_free = dg00x_card_free; 105 dg00x->card->private_data = dg00x; 106 dg00x->registered = true; 107 108 return; 109 error: 110 snd_dg00x_transaction_unregister(dg00x); 111 snd_dg00x_stream_destroy_duplex(dg00x); 112 snd_card_free(dg00x->card); 113 dev_info(&dg00x->unit->device, 114 "Sound card registration failed: %d\n", err); 115 } 116 117 static int snd_dg00x_probe(struct fw_unit *unit, 118 const struct ieee1394_device_id *entry) 119 { 120 struct snd_dg00x *dg00x; 121 122 /* Allocate this independent of sound card instance. */ 123 dg00x = kzalloc(sizeof(struct snd_dg00x), GFP_KERNEL); 124 if (dg00x == NULL) 125 return -ENOMEM; 126 127 dg00x->unit = fw_unit_get(unit); 128 dev_set_drvdata(&unit->device, dg00x); 129 130 mutex_init(&dg00x->mutex); 131 spin_lock_init(&dg00x->lock); 132 init_waitqueue_head(&dg00x->hwdep_wait); 133 134 dg00x->is_console = entry->model_id == MODEL_CONSOLE; 135 136 /* Allocate and register this sound card later. */ 137 INIT_DEFERRABLE_WORK(&dg00x->dwork, do_registration); 138 snd_fw_schedule_registration(unit, &dg00x->dwork); 139 140 return 0; 141 } 142 143 static void snd_dg00x_update(struct fw_unit *unit) 144 { 145 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 146 147 /* Postpone a workqueue for deferred registration. */ 148 if (!dg00x->registered) 149 snd_fw_schedule_registration(unit, &dg00x->dwork); 150 151 snd_dg00x_transaction_reregister(dg00x); 152 153 /* 154 * After registration, userspace can start packet streaming, then this 155 * code block works fine. 156 */ 157 if (dg00x->registered) { 158 mutex_lock(&dg00x->mutex); 159 snd_dg00x_stream_update_duplex(dg00x); 160 mutex_unlock(&dg00x->mutex); 161 } 162 } 163 164 static void snd_dg00x_remove(struct fw_unit *unit) 165 { 166 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 167 168 /* 169 * Confirm to stop the work for registration before the sound card is 170 * going to be released. The work is not scheduled again because bus 171 * reset handler is not called anymore. 172 */ 173 cancel_delayed_work_sync(&dg00x->dwork); 174 175 if (dg00x->registered) { 176 /* No need to wait for releasing card object in this context. */ 177 snd_card_free_when_closed(dg00x->card); 178 } else { 179 /* Don't forget this case. */ 180 dg00x_free(dg00x); 181 } 182 } 183 184 static const struct ieee1394_device_id snd_dg00x_id_table[] = { 185 /* Both of 002/003 use the same ID. */ 186 { 187 .match_flags = IEEE1394_MATCH_VENDOR_ID | 188 IEEE1394_MATCH_MODEL_ID, 189 .vendor_id = VENDOR_DIGIDESIGN, 190 .model_id = MODEL_CONSOLE, 191 }, 192 { 193 .match_flags = IEEE1394_MATCH_VENDOR_ID | 194 IEEE1394_MATCH_MODEL_ID, 195 .vendor_id = VENDOR_DIGIDESIGN, 196 .model_id = MODEL_RACK, 197 }, 198 {} 199 }; 200 MODULE_DEVICE_TABLE(ieee1394, snd_dg00x_id_table); 201 202 static struct fw_driver dg00x_driver = { 203 .driver = { 204 .owner = THIS_MODULE, 205 .name = "snd-firewire-digi00x", 206 .bus = &fw_bus_type, 207 }, 208 .probe = snd_dg00x_probe, 209 .update = snd_dg00x_update, 210 .remove = snd_dg00x_remove, 211 .id_table = snd_dg00x_id_table, 212 }; 213 214 static int __init snd_dg00x_init(void) 215 { 216 return driver_register(&dg00x_driver.driver); 217 } 218 219 static void __exit snd_dg00x_exit(void) 220 { 221 driver_unregister(&dg00x_driver.driver); 222 } 223 224 module_init(snd_dg00x_init); 225 module_exit(snd_dg00x_exit); 226