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_DIGI00X 0x000002 17 18 static int name_card(struct snd_dg00x *dg00x) 19 { 20 struct fw_device *fw_dev = fw_parent_device(dg00x->unit); 21 char name[32] = {0}; 22 char *model; 23 int err; 24 25 err = fw_csr_string(dg00x->unit->directory, CSR_MODEL, name, 26 sizeof(name)); 27 if (err < 0) 28 return err; 29 30 model = skip_spaces(name); 31 32 strcpy(dg00x->card->driver, "Digi00x"); 33 strcpy(dg00x->card->shortname, model); 34 strcpy(dg00x->card->mixername, model); 35 snprintf(dg00x->card->longname, sizeof(dg00x->card->longname), 36 "Digidesign %s, GUID %08x%08x at %s, S%d", model, 37 fw_dev->config_rom[3], fw_dev->config_rom[4], 38 dev_name(&dg00x->unit->device), 100 << fw_dev->max_speed); 39 40 return 0; 41 } 42 43 static void dg00x_free(struct snd_dg00x *dg00x) 44 { 45 snd_dg00x_stream_destroy_duplex(dg00x); 46 snd_dg00x_transaction_unregister(dg00x); 47 48 fw_unit_put(dg00x->unit); 49 50 mutex_destroy(&dg00x->mutex); 51 } 52 53 static void dg00x_card_free(struct snd_card *card) 54 { 55 dg00x_free(card->private_data); 56 } 57 58 static void do_registration(struct work_struct *work) 59 { 60 struct snd_dg00x *dg00x = 61 container_of(work, struct snd_dg00x, dwork.work); 62 int err; 63 64 if (dg00x->registered) 65 return; 66 67 err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0, 68 &dg00x->card); 69 if (err < 0) 70 return; 71 72 err = name_card(dg00x); 73 if (err < 0) 74 goto error; 75 76 err = snd_dg00x_stream_init_duplex(dg00x); 77 if (err < 0) 78 goto error; 79 80 snd_dg00x_proc_init(dg00x); 81 82 err = snd_dg00x_create_pcm_devices(dg00x); 83 if (err < 0) 84 goto error; 85 86 err = snd_dg00x_create_midi_devices(dg00x); 87 if (err < 0) 88 goto error; 89 90 err = snd_dg00x_create_hwdep_device(dg00x); 91 if (err < 0) 92 goto error; 93 94 err = snd_dg00x_transaction_register(dg00x); 95 if (err < 0) 96 goto error; 97 98 err = snd_card_register(dg00x->card); 99 if (err < 0) 100 goto error; 101 102 dg00x->card->private_free = dg00x_card_free; 103 dg00x->card->private_data = dg00x; 104 dg00x->registered = true; 105 106 return; 107 error: 108 snd_dg00x_transaction_unregister(dg00x); 109 snd_dg00x_stream_destroy_duplex(dg00x); 110 snd_card_free(dg00x->card); 111 dev_info(&dg00x->unit->device, 112 "Sound card registration failed: %d\n", err); 113 } 114 115 static int snd_dg00x_probe(struct fw_unit *unit, 116 const struct ieee1394_device_id *entry) 117 { 118 struct snd_dg00x *dg00x; 119 120 /* Allocate this independent of sound card instance. */ 121 dg00x = kzalloc(sizeof(struct snd_dg00x), GFP_KERNEL); 122 if (dg00x == NULL) 123 return -ENOMEM; 124 125 dg00x->unit = fw_unit_get(unit); 126 dev_set_drvdata(&unit->device, dg00x); 127 128 mutex_init(&dg00x->mutex); 129 spin_lock_init(&dg00x->lock); 130 init_waitqueue_head(&dg00x->hwdep_wait); 131 132 /* Allocate and register this sound card later. */ 133 INIT_DEFERRABLE_WORK(&dg00x->dwork, do_registration); 134 snd_fw_schedule_registration(unit, &dg00x->dwork); 135 136 return 0; 137 } 138 139 static void snd_dg00x_update(struct fw_unit *unit) 140 { 141 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 142 143 /* Postpone a workqueue for deferred registration. */ 144 if (!dg00x->registered) 145 snd_fw_schedule_registration(unit, &dg00x->dwork); 146 147 snd_dg00x_transaction_reregister(dg00x); 148 149 /* 150 * After registration, userspace can start packet streaming, then this 151 * code block works fine. 152 */ 153 if (dg00x->registered) { 154 mutex_lock(&dg00x->mutex); 155 snd_dg00x_stream_update_duplex(dg00x); 156 mutex_unlock(&dg00x->mutex); 157 } 158 } 159 160 static void snd_dg00x_remove(struct fw_unit *unit) 161 { 162 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 163 164 /* 165 * Confirm to stop the work for registration before the sound card is 166 * going to be released. The work is not scheduled again because bus 167 * reset handler is not called anymore. 168 */ 169 cancel_delayed_work_sync(&dg00x->dwork); 170 171 if (dg00x->registered) { 172 /* No need to wait for releasing card object in this context. */ 173 snd_card_free_when_closed(dg00x->card); 174 } else { 175 /* Don't forget this case. */ 176 dg00x_free(dg00x); 177 } 178 } 179 180 static const struct ieee1394_device_id snd_dg00x_id_table[] = { 181 /* Both of 002/003 use the same ID. */ 182 { 183 .match_flags = IEEE1394_MATCH_VENDOR_ID | 184 IEEE1394_MATCH_MODEL_ID, 185 .vendor_id = VENDOR_DIGIDESIGN, 186 .model_id = MODEL_DIGI00X, 187 }, 188 {} 189 }; 190 MODULE_DEVICE_TABLE(ieee1394, snd_dg00x_id_table); 191 192 static struct fw_driver dg00x_driver = { 193 .driver = { 194 .owner = THIS_MODULE, 195 .name = "snd-firewire-digi00x", 196 .bus = &fw_bus_type, 197 }, 198 .probe = snd_dg00x_probe, 199 .update = snd_dg00x_update, 200 .remove = snd_dg00x_remove, 201 .id_table = snd_dg00x_id_table, 202 }; 203 204 static int __init snd_dg00x_init(void) 205 { 206 return driver_register(&dg00x_driver.driver); 207 } 208 209 static void __exit snd_dg00x_exit(void) 210 { 211 driver_unregister(&dg00x_driver.driver); 212 } 213 214 module_init(snd_dg00x_init); 215 module_exit(snd_dg00x_exit); 216