1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * digi00x.c - a part of driver for Digidesign Digi 002/003 family 4 * 5 * Copyright (c) 2014-2015 Takashi Sakamoto 6 */ 7 8 #include "digi00x.h" 9 10 MODULE_DESCRIPTION("Digidesign Digi 002/003 family Driver"); 11 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>"); 12 MODULE_LICENSE("GPL v2"); 13 14 #define VENDOR_DIGIDESIGN 0x00a07e 15 #define MODEL_CONSOLE 0x000001 16 #define MODEL_RACK 0x000002 17 #define SPEC_VERSION 0x000001 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_VERSION | 180 IEEE1394_MATCH_MODEL_ID, 181 .vendor_id = VENDOR_DIGIDESIGN, 182 .version = SPEC_VERSION, 183 .model_id = MODEL_CONSOLE, 184 }, 185 { 186 .match_flags = IEEE1394_MATCH_VENDOR_ID | 187 IEEE1394_MATCH_VERSION | 188 IEEE1394_MATCH_MODEL_ID, 189 .vendor_id = VENDOR_DIGIDESIGN, 190 .version = SPEC_VERSION, 191 .model_id = MODEL_RACK, 192 }, 193 {} 194 }; 195 MODULE_DEVICE_TABLE(ieee1394, snd_dg00x_id_table); 196 197 static struct fw_driver dg00x_driver = { 198 .driver = { 199 .owner = THIS_MODULE, 200 .name = KBUILD_MODNAME, 201 .bus = &fw_bus_type, 202 }, 203 .probe = snd_dg00x_probe, 204 .update = snd_dg00x_update, 205 .remove = snd_dg00x_remove, 206 .id_table = snd_dg00x_id_table, 207 }; 208 209 static int __init snd_dg00x_init(void) 210 { 211 return driver_register(&dg00x_driver.driver); 212 } 213 214 static void __exit snd_dg00x_exit(void) 215 { 216 driver_unregister(&dg00x_driver.driver); 217 } 218 219 module_init(snd_dg00x_init); 220 module_exit(snd_dg00x_exit); 221