| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * digi00x.c - a part of driver for Digidesign Digi 002/003 family |
| * |
| * Copyright (c) 2014-2015 Takashi Sakamoto |
| */ |
| |
| #include "digi00x.h" |
| |
| MODULE_DESCRIPTION("Digidesign Digi 002/003 family Driver"); |
| MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>"); |
| MODULE_LICENSE("GPL v2"); |
| |
| #define VENDOR_DIGIDESIGN 0x00a07e |
| #define MODEL_CONSOLE 0x000001 |
| #define MODEL_RACK 0x000002 |
| |
| static int name_card(struct snd_dg00x *dg00x) |
| { |
| struct fw_device *fw_dev = fw_parent_device(dg00x->unit); |
| char name[32] = {0}; |
| char *model; |
| int err; |
| |
| err = fw_csr_string(dg00x->unit->directory, CSR_MODEL, name, |
| sizeof(name)); |
| if (err < 0) |
| return err; |
| |
| model = skip_spaces(name); |
| |
| strcpy(dg00x->card->driver, "Digi00x"); |
| strcpy(dg00x->card->shortname, model); |
| strcpy(dg00x->card->mixername, model); |
| snprintf(dg00x->card->longname, sizeof(dg00x->card->longname), |
| "Digidesign %s, GUID %08x%08x at %s, S%d", model, |
| fw_dev->config_rom[3], fw_dev->config_rom[4], |
| dev_name(&dg00x->unit->device), 100 << fw_dev->max_speed); |
| |
| return 0; |
| } |
| |
| static void dg00x_card_free(struct snd_card *card) |
| { |
| struct snd_dg00x *dg00x = card->private_data; |
| |
| snd_dg00x_stream_destroy_duplex(dg00x); |
| snd_dg00x_transaction_unregister(dg00x); |
| } |
| |
| static void do_registration(struct work_struct *work) |
| { |
| struct snd_dg00x *dg00x = |
| container_of(work, struct snd_dg00x, dwork.work); |
| int err; |
| |
| if (dg00x->registered) |
| return; |
| |
| err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0, |
| &dg00x->card); |
| if (err < 0) |
| return; |
| dg00x->card->private_free = dg00x_card_free; |
| dg00x->card->private_data = dg00x; |
| |
| err = name_card(dg00x); |
| if (err < 0) |
| goto error; |
| |
| err = snd_dg00x_stream_init_duplex(dg00x); |
| if (err < 0) |
| goto error; |
| |
| snd_dg00x_proc_init(dg00x); |
| |
| err = snd_dg00x_create_pcm_devices(dg00x); |
| if (err < 0) |
| goto error; |
| |
| err = snd_dg00x_create_midi_devices(dg00x); |
| if (err < 0) |
| goto error; |
| |
| err = snd_dg00x_create_hwdep_device(dg00x); |
| if (err < 0) |
| goto error; |
| |
| err = snd_dg00x_transaction_register(dg00x); |
| if (err < 0) |
| goto error; |
| |
| err = snd_card_register(dg00x->card); |
| if (err < 0) |
| goto error; |
| |
| dg00x->registered = true; |
| |
| return; |
| error: |
| snd_card_free(dg00x->card); |
| dev_info(&dg00x->unit->device, |
| "Sound card registration failed: %d\n", err); |
| } |
| |
| static int snd_dg00x_probe(struct fw_unit *unit, |
| const struct ieee1394_device_id *entry) |
| { |
| struct snd_dg00x *dg00x; |
| |
| /* Allocate this independent of sound card instance. */ |
| dg00x = devm_kzalloc(&unit->device, sizeof(struct snd_dg00x), |
| GFP_KERNEL); |
| if (!dg00x) |
| return -ENOMEM; |
| |
| dg00x->unit = fw_unit_get(unit); |
| dev_set_drvdata(&unit->device, dg00x); |
| |
| mutex_init(&dg00x->mutex); |
| spin_lock_init(&dg00x->lock); |
| init_waitqueue_head(&dg00x->hwdep_wait); |
| |
| dg00x->is_console = entry->model_id == MODEL_CONSOLE; |
| |
| /* Allocate and register this sound card later. */ |
| INIT_DEFERRABLE_WORK(&dg00x->dwork, do_registration); |
| snd_fw_schedule_registration(unit, &dg00x->dwork); |
| |
| return 0; |
| } |
| |
| static void snd_dg00x_update(struct fw_unit *unit) |
| { |
| struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); |
| |
| /* Postpone a workqueue for deferred registration. */ |
| if (!dg00x->registered) |
| snd_fw_schedule_registration(unit, &dg00x->dwork); |
| |
| snd_dg00x_transaction_reregister(dg00x); |
| |
| /* |
| * After registration, userspace can start packet streaming, then this |
| * code block works fine. |
| */ |
| if (dg00x->registered) { |
| mutex_lock(&dg00x->mutex); |
| snd_dg00x_stream_update_duplex(dg00x); |
| mutex_unlock(&dg00x->mutex); |
| } |
| } |
| |
| static void snd_dg00x_remove(struct fw_unit *unit) |
| { |
| struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device); |
| |
| /* |
| * Confirm to stop the work for registration before the sound card is |
| * going to be released. The work is not scheduled again because bus |
| * reset handler is not called anymore. |
| */ |
| cancel_delayed_work_sync(&dg00x->dwork); |
| |
| if (dg00x->registered) { |
| // Block till all of ALSA character devices are released. |
| snd_card_free(dg00x->card); |
| } |
| |
| mutex_destroy(&dg00x->mutex); |
| fw_unit_put(dg00x->unit); |
| } |
| |
| static const struct ieee1394_device_id snd_dg00x_id_table[] = { |
| /* Both of 002/003 use the same ID. */ |
| { |
| .match_flags = IEEE1394_MATCH_VENDOR_ID | |
| IEEE1394_MATCH_MODEL_ID, |
| .vendor_id = VENDOR_DIGIDESIGN, |
| .model_id = MODEL_CONSOLE, |
| }, |
| { |
| .match_flags = IEEE1394_MATCH_VENDOR_ID | |
| IEEE1394_MATCH_MODEL_ID, |
| .vendor_id = VENDOR_DIGIDESIGN, |
| .model_id = MODEL_RACK, |
| }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(ieee1394, snd_dg00x_id_table); |
| |
| static struct fw_driver dg00x_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "snd-firewire-digi00x", |
| .bus = &fw_bus_type, |
| }, |
| .probe = snd_dg00x_probe, |
| .update = snd_dg00x_update, |
| .remove = snd_dg00x_remove, |
| .id_table = snd_dg00x_id_table, |
| }; |
| |
| static int __init snd_dg00x_init(void) |
| { |
| return driver_register(&dg00x_driver.driver); |
| } |
| |
| static void __exit snd_dg00x_exit(void) |
| { |
| driver_unregister(&dg00x_driver.driver); |
| } |
| |
| module_init(snd_dg00x_init); |
| module_exit(snd_dg00x_exit); |