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_card_free(struct snd_card *card) 45 { 46 struct snd_dg00x *dg00x = card->private_data; 47 48 snd_dg00x_stream_destroy_duplex(dg00x); 49 snd_dg00x_transaction_unregister(dg00x); 50 } 51 52 static void do_registration(struct work_struct *work) 53 { 54 struct snd_dg00x *dg00x = 55 container_of(work, struct snd_dg00x, dwork.work); 56 int err; 57 58 if (dg00x->registered) 59 return; 60 61 err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0, 62 &dg00x->card); 63 if (err < 0) 64 return; 65 dg00x->card->private_free = dg00x_card_free; 66 dg00x->card->private_data = dg00x; 67 68 err = name_card(dg00x); 69 if (err < 0) 70 goto error; 71 72 err = snd_dg00x_stream_init_duplex(dg00x); 73 if (err < 0) 74 goto error; 75 76 snd_dg00x_proc_init(dg00x); 77 78 err = snd_dg00x_create_pcm_devices(dg00x); 79 if (err < 0) 80 goto error; 81 82 err = snd_dg00x_create_midi_devices(dg00x); 83 if (err < 0) 84 goto error; 85 86 err = snd_dg00x_create_hwdep_device(dg00x); 87 if (err < 0) 88 goto error; 89 90 err = snd_dg00x_transaction_register(dg00x); 91 if (err < 0) 92 goto error; 93 94 err = snd_card_register(dg00x->card); 95 if (err < 0) 96 goto error; 97 98 dg00x->registered = true; 99 100 return; 101 error: 102 snd_card_free(dg00x->card); 103 dev_info(&dg00x->unit->device, 104 "Sound card registration failed: %d\n", err); 105 } 106 107 static int snd_dg00x_probe(struct fw_unit *unit, 108 const struct ieee1394_device_id *entry) 109 { 110 struct snd_dg00x *dg00x; 111 112 /* Allocate this independent of sound card instance. */ 113 dg00x = devm_kzalloc(&unit->device, sizeof(struct snd_dg00x), 114 GFP_KERNEL); 115 if (!dg00x) 116 return -ENOMEM; 117 118 dg00x->unit = fw_unit_get(unit); 119 dev_set_drvdata(&unit->device, dg00x); 120 121 mutex_init(&dg00x->mutex); 122 spin_lock_init(&dg00x->lock); 123 init_waitqueue_head(&dg00x->hwdep_wait); 124 125 dg00x->is_console = entry->model_id == MODEL_CONSOLE; 126 127 /* Allocate and register this sound card later. */ 128 INIT_DEFERRABLE_WORK(&dg00x->dwork, do_registration); 129 snd_fw_schedule_registration(unit, &dg00x->dwork); 130 131 return 0; 132 } 133 134 static void snd_dg00x_update(struct fw_unit *unit) 135 { 136 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 137 138 /* Postpone a workqueue for deferred registration. */ 139 if (!dg00x->registered) 140 snd_fw_schedule_registration(unit, &dg00x->dwork); 141 142 snd_dg00x_transaction_reregister(dg00x); 143 144 /* 145 * After registration, userspace can start packet streaming, then this 146 * code block works fine. 147 */ 148 if (dg00x->registered) { 149 mutex_lock(&dg00x->mutex); 150 snd_dg00x_stream_update_duplex(dg00x); 151 mutex_unlock(&dg00x->mutex); 152 } 153 } 154 155 static void snd_dg00x_remove(struct fw_unit *unit) 156 { 157 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 158 159 /* 160 * Confirm to stop the work for registration before the sound card is 161 * going to be released. The work is not scheduled again because bus 162 * reset handler is not called anymore. 163 */ 164 cancel_delayed_work_sync(&dg00x->dwork); 165 166 if (dg00x->registered) { 167 // Block till all of ALSA character devices are released. 168 snd_card_free(dg00x->card); 169 } 170 171 mutex_destroy(&dg00x->mutex); 172 fw_unit_put(dg00x->unit); 173 } 174 175 static const struct ieee1394_device_id snd_dg00x_id_table[] = { 176 /* Both of 002/003 use the same ID. */ 177 { 178 .match_flags = IEEE1394_MATCH_VENDOR_ID | 179 IEEE1394_MATCH_MODEL_ID, 180 .vendor_id = VENDOR_DIGIDESIGN, 181 .model_id = MODEL_CONSOLE, 182 }, 183 { 184 .match_flags = IEEE1394_MATCH_VENDOR_ID | 185 IEEE1394_MATCH_MODEL_ID, 186 .vendor_id = VENDOR_DIGIDESIGN, 187 .model_id = MODEL_RACK, 188 }, 189 {} 190 }; 191 MODULE_DEVICE_TABLE(ieee1394, snd_dg00x_id_table); 192 193 static struct fw_driver dg00x_driver = { 194 .driver = { 195 .owner = THIS_MODULE, 196 .name = "snd-firewire-digi00x", 197 .bus = &fw_bus_type, 198 }, 199 .probe = snd_dg00x_probe, 200 .update = snd_dg00x_update, 201 .remove = snd_dg00x_remove, 202 .id_table = snd_dg00x_id_table, 203 }; 204 205 static int __init snd_dg00x_init(void) 206 { 207 return driver_register(&dg00x_driver.driver); 208 } 209 210 static void __exit snd_dg00x_exit(void) 211 { 212 driver_unregister(&dg00x_driver.driver); 213 } 214 215 module_init(snd_dg00x_init); 216 module_exit(snd_dg00x_exit); 217