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 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_card_free(struct snd_card *card) 44 { 45 struct snd_dg00x *dg00x = card->private_data; 46 47 snd_dg00x_stream_destroy_duplex(dg00x); 48 snd_dg00x_transaction_unregister(dg00x); 49 } 50 51 static void do_registration(struct work_struct *work) 52 { 53 struct snd_dg00x *dg00x = 54 container_of(work, struct snd_dg00x, dwork.work); 55 int err; 56 57 if (dg00x->registered) 58 return; 59 60 err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0, 61 &dg00x->card); 62 if (err < 0) 63 return; 64 dg00x->card->private_free = dg00x_card_free; 65 dg00x->card->private_data = dg00x; 66 67 err = name_card(dg00x); 68 if (err < 0) 69 goto error; 70 71 err = snd_dg00x_stream_init_duplex(dg00x); 72 if (err < 0) 73 goto error; 74 75 snd_dg00x_proc_init(dg00x); 76 77 err = snd_dg00x_create_pcm_devices(dg00x); 78 if (err < 0) 79 goto error; 80 81 err = snd_dg00x_create_midi_devices(dg00x); 82 if (err < 0) 83 goto error; 84 85 err = snd_dg00x_create_hwdep_device(dg00x); 86 if (err < 0) 87 goto error; 88 89 err = snd_dg00x_transaction_register(dg00x); 90 if (err < 0) 91 goto error; 92 93 err = snd_card_register(dg00x->card); 94 if (err < 0) 95 goto error; 96 97 dg00x->registered = true; 98 99 return; 100 error: 101 snd_card_free(dg00x->card); 102 dev_info(&dg00x->unit->device, 103 "Sound card registration failed: %d\n", err); 104 } 105 106 static int snd_dg00x_probe(struct fw_unit *unit, 107 const struct ieee1394_device_id *entry) 108 { 109 struct snd_dg00x *dg00x; 110 111 /* Allocate this independent of sound card instance. */ 112 dg00x = devm_kzalloc(&unit->device, sizeof(struct snd_dg00x), 113 GFP_KERNEL); 114 if (!dg00x) 115 return -ENOMEM; 116 117 dg00x->unit = fw_unit_get(unit); 118 dev_set_drvdata(&unit->device, dg00x); 119 120 mutex_init(&dg00x->mutex); 121 spin_lock_init(&dg00x->lock); 122 init_waitqueue_head(&dg00x->hwdep_wait); 123 124 dg00x->is_console = entry->model_id == MODEL_CONSOLE; 125 126 /* Allocate and register this sound card later. */ 127 INIT_DEFERRABLE_WORK(&dg00x->dwork, do_registration); 128 snd_fw_schedule_registration(unit, &dg00x->dwork); 129 130 return 0; 131 } 132 133 static void snd_dg00x_update(struct fw_unit *unit) 134 { 135 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 136 137 /* Postpone a workqueue for deferred registration. */ 138 if (!dg00x->registered) 139 snd_fw_schedule_registration(unit, &dg00x->dwork); 140 141 snd_dg00x_transaction_reregister(dg00x); 142 143 /* 144 * After registration, userspace can start packet streaming, then this 145 * code block works fine. 146 */ 147 if (dg00x->registered) { 148 mutex_lock(&dg00x->mutex); 149 snd_dg00x_stream_update_duplex(dg00x); 150 mutex_unlock(&dg00x->mutex); 151 } 152 } 153 154 static void snd_dg00x_remove(struct fw_unit *unit) 155 { 156 struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); 157 158 /* 159 * Confirm to stop the work for registration before the sound card is 160 * going to be released. The work is not scheduled again because bus 161 * reset handler is not called anymore. 162 */ 163 cancel_delayed_work_sync(&dg00x->dwork); 164 165 if (dg00x->registered) { 166 // Block till all of ALSA character devices are released. 167 snd_card_free(dg00x->card); 168 } 169 170 mutex_destroy(&dg00x->mutex); 171 fw_unit_put(dg00x->unit); 172 } 173 174 static const struct ieee1394_device_id snd_dg00x_id_table[] = { 175 /* Both of 002/003 use the same ID. */ 176 { 177 .match_flags = IEEE1394_MATCH_VENDOR_ID | 178 IEEE1394_MATCH_MODEL_ID, 179 .vendor_id = VENDOR_DIGIDESIGN, 180 .model_id = MODEL_CONSOLE, 181 }, 182 { 183 .match_flags = IEEE1394_MATCH_VENDOR_ID | 184 IEEE1394_MATCH_MODEL_ID, 185 .vendor_id = VENDOR_DIGIDESIGN, 186 .model_id = MODEL_RACK, 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 = KBUILD_MODNAME, 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