forked from rrcarlosr/Jetpack
263 lines
5.9 KiB
C
263 lines
5.9 KiB
C
/*
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* tascam.c - a part of driver for TASCAM FireWire series
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*
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* Copyright (c) 2015 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "tascam.h"
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MODULE_DESCRIPTION("TASCAM FireWire series Driver");
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MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
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MODULE_LICENSE("GPL v2");
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static struct snd_tscm_spec model_specs[] = {
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{
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.name = "FW-1884",
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.has_adat = true,
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.has_spdif = true,
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.pcm_capture_analog_channels = 8,
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.pcm_playback_analog_channels = 8,
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.midi_capture_ports = 4,
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.midi_playback_ports = 4,
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},
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{
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.name = "FW-1082",
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.has_adat = false,
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.has_spdif = true,
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.pcm_capture_analog_channels = 8,
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.pcm_playback_analog_channels = 2,
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.midi_capture_ports = 2,
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.midi_playback_ports = 2,
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},
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{
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.name = "FW-1804",
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.has_adat = true,
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.has_spdif = true,
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.pcm_capture_analog_channels = 8,
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.pcm_playback_analog_channels = 2,
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.midi_capture_ports = 2,
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.midi_playback_ports = 4,
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},
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};
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static int identify_model(struct snd_tscm *tscm)
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{
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struct fw_device *fw_dev = fw_parent_device(tscm->unit);
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const u32 *config_rom = fw_dev->config_rom;
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char model[9];
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unsigned int i;
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u8 c;
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if (fw_dev->config_rom_length < 30) {
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dev_err(&tscm->unit->device,
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"Configuration ROM is too short.\n");
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return -ENODEV;
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}
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/* Pick up model name from certain addresses. */
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for (i = 0; i < 8; i++) {
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c = config_rom[28 + i / 4] >> (24 - 8 * (i % 4));
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if (c == '\0')
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break;
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model[i] = c;
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}
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model[i] = '\0';
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for (i = 0; i < ARRAY_SIZE(model_specs); i++) {
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if (strcmp(model, model_specs[i].name) == 0) {
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tscm->spec = &model_specs[i];
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break;
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}
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}
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if (tscm->spec == NULL)
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return -ENODEV;
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strcpy(tscm->card->driver, "FW-TASCAM");
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strcpy(tscm->card->shortname, model);
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strcpy(tscm->card->mixername, model);
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snprintf(tscm->card->longname, sizeof(tscm->card->longname),
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"TASCAM %s, GUID %08x%08x at %s, S%d", model,
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fw_dev->config_rom[3], fw_dev->config_rom[4],
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dev_name(&tscm->unit->device), 100 << fw_dev->max_speed);
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return 0;
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}
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static void tscm_free(struct snd_tscm *tscm)
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{
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snd_tscm_transaction_unregister(tscm);
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snd_tscm_stream_destroy_duplex(tscm);
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fw_unit_put(tscm->unit);
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mutex_destroy(&tscm->mutex);
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kfree(tscm);
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}
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static void tscm_card_free(struct snd_card *card)
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{
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tscm_free(card->private_data);
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}
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static void do_registration(struct work_struct *work)
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{
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struct snd_tscm *tscm = container_of(work, struct snd_tscm, dwork.work);
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int err;
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err = snd_card_new(&tscm->unit->device, -1, NULL, THIS_MODULE, 0,
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&tscm->card);
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if (err < 0)
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return;
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err = identify_model(tscm);
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if (err < 0)
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goto error;
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err = snd_tscm_transaction_register(tscm);
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if (err < 0)
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goto error;
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err = snd_tscm_stream_init_duplex(tscm);
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if (err < 0)
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goto error;
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snd_tscm_proc_init(tscm);
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err = snd_tscm_create_pcm_devices(tscm);
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if (err < 0)
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goto error;
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err = snd_tscm_create_midi_devices(tscm);
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if (err < 0)
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goto error;
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err = snd_tscm_create_hwdep_device(tscm);
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if (err < 0)
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goto error;
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err = snd_card_register(tscm->card);
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if (err < 0)
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goto error;
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/*
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* After registered, tscm instance can be released corresponding to
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* releasing the sound card instance.
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*/
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tscm->card->private_free = tscm_card_free;
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tscm->card->private_data = tscm;
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tscm->registered = true;
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return;
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error:
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snd_tscm_transaction_unregister(tscm);
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snd_tscm_stream_destroy_duplex(tscm);
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snd_card_free(tscm->card);
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dev_info(&tscm->unit->device,
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"Sound card registration failed: %d\n", err);
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}
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static int snd_tscm_probe(struct fw_unit *unit,
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const struct ieee1394_device_id *entry)
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{
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struct snd_tscm *tscm;
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/* Allocate this independent of sound card instance. */
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tscm = kzalloc(sizeof(struct snd_tscm), GFP_KERNEL);
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if (tscm == NULL)
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return -ENOMEM;
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/* initialize myself */
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tscm->unit = fw_unit_get(unit);
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dev_set_drvdata(&unit->device, tscm);
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mutex_init(&tscm->mutex);
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spin_lock_init(&tscm->lock);
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init_waitqueue_head(&tscm->hwdep_wait);
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/* Allocate and register this sound card later. */
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INIT_DEFERRABLE_WORK(&tscm->dwork, do_registration);
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snd_fw_schedule_registration(unit, &tscm->dwork);
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return 0;
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}
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static void snd_tscm_update(struct fw_unit *unit)
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{
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struct snd_tscm *tscm = dev_get_drvdata(&unit->device);
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/* Postpone a workqueue for deferred registration. */
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if (!tscm->registered)
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snd_fw_schedule_registration(unit, &tscm->dwork);
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snd_tscm_transaction_reregister(tscm);
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/*
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* After registration, userspace can start packet streaming, then this
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* code block works fine.
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*/
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if (tscm->registered) {
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mutex_lock(&tscm->mutex);
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snd_tscm_stream_update_duplex(tscm);
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mutex_unlock(&tscm->mutex);
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}
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}
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static void snd_tscm_remove(struct fw_unit *unit)
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{
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struct snd_tscm *tscm = dev_get_drvdata(&unit->device);
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/*
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* Confirm to stop the work for registration before the sound card is
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* going to be released. The work is not scheduled again because bus
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* reset handler is not called anymore.
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*/
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cancel_delayed_work_sync(&tscm->dwork);
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if (tscm->registered) {
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/* No need to wait for releasing card object in this context. */
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snd_card_free_when_closed(tscm->card);
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} else {
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/* Don't forget this case. */
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tscm_free(tscm);
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}
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}
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static const struct ieee1394_device_id snd_tscm_id_table[] = {
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{
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.match_flags = IEEE1394_MATCH_VENDOR_ID |
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IEEE1394_MATCH_SPECIFIER_ID,
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.vendor_id = 0x00022e,
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.specifier_id = 0x00022e,
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},
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/* FE-08 requires reverse-engineering because it just has faders. */
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{}
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};
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MODULE_DEVICE_TABLE(ieee1394, snd_tscm_id_table);
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static struct fw_driver tscm_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "snd-firewire-tascam",
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.bus = &fw_bus_type,
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},
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.probe = snd_tscm_probe,
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.update = snd_tscm_update,
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.remove = snd_tscm_remove,
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.id_table = snd_tscm_id_table,
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};
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static int __init snd_tscm_init(void)
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{
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return driver_register(&tscm_driver.driver);
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}
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static void __exit snd_tscm_exit(void)
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{
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driver_unregister(&tscm_driver.driver);
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}
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module_init(snd_tscm_init);
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module_exit(snd_tscm_exit);
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