diff options
Diffstat (limited to 'sound/firewire/digi00x/digi00x.c')
| -rw-r--r-- | sound/firewire/digi00x/digi00x.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/sound/firewire/digi00x/digi00x.c b/sound/firewire/digi00x/digi00x.c new file mode 100644 index 000000000..bf53e3427 --- /dev/null +++ b/sound/firewire/digi00x/digi00x.c @@ -0,0 +1,230 @@ +/* + * digi00x.c - a part of driver for Digidesign Digi 002/003 family + * + * Copyright (c) 2014-2015 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#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 +#define SPEC_VERSION 0x000001 + +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_free(struct snd_dg00x *dg00x) +{ + snd_dg00x_stream_destroy_duplex(dg00x); + snd_dg00x_transaction_unregister(dg00x); + + fw_unit_put(dg00x->unit); + + mutex_destroy(&dg00x->mutex); + kfree(dg00x); +} + +static void dg00x_card_free(struct snd_card *card) +{ + dg00x_free(card->private_data); +} + +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; + + 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->card->private_free = dg00x_card_free; + dg00x->card->private_data = dg00x; + dg00x->registered = true; + + return; +error: + snd_dg00x_transaction_unregister(dg00x); + snd_dg00x_stream_destroy_duplex(dg00x); + 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 = kzalloc(sizeof(struct snd_dg00x), GFP_KERNEL); + if (dg00x == NULL) + 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) { + /* No need to wait for releasing card object in this context. */ + snd_card_free_when_closed(dg00x->card); + } else { + /* Don't forget this case. */ + dg00x_free(dg00x); + } +} + +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_VERSION | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = VENDOR_DIGIDESIGN, + .version = SPEC_VERSION, + .model_id = MODEL_CONSOLE, + }, + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_VERSION | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = VENDOR_DIGIDESIGN, + .version = SPEC_VERSION, + .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); |