static void efw_remove(struct fw_unit *unit)
{
struct snd_efw *efw = dev_get_drvdata(&unit->device);
snd_efw_stream_destroy_duplex(efw);
snd_efw_transaction_remove_instance(efw);
snd_card_disconnect(efw->card);
snd_card_free_when_closed(efw->card);
}
/*
* This module releases the FireWire unit data after all ALSA character devices
* are released by applications. This is for releasing stream data or finishing
* transactions safely. Thus at returning from .remove(), this module still keep
* references for the unit.
*/
static void
efw_card_free(struct snd_card *card)
{
struct snd_efw *efw = card->private_data;
snd_efw_stream_destroy_duplex(efw);
snd_efw_transaction_remove_instance(efw);
fw_unit_put(efw->unit);
kfree(efw->resp_buf);
if (efw->card_index >= 0) {
mutex_lock(&devices_mutex);
clear_bit(efw->card_index, devices_used);
mutex_unlock(&devices_mutex);
}
mutex_destroy(&efw->mutex);
}
static int
efw_probe(struct fw_unit *unit,
const struct ieee1394_device_id *entry)
{
struct snd_card *card;
struct snd_efw *efw;
int card_index, err;
mutex_lock(&devices_mutex);
/* check registered cards */
for (card_index = 0; card_index < SNDRV_CARDS; ++card_index) {
if (!test_bit(card_index, devices_used) && enable[card_index])
break;
}
if (card_index >= SNDRV_CARDS) {
err = -ENOENT;
goto end;
}
err = snd_card_new(&unit->device, index[card_index], id[card_index],
THIS_MODULE, sizeof(struct snd_efw), &card);
if (err < 0)
goto end;
efw = card->private_data;
efw->card_index = card_index;
set_bit(card_index, devices_used);
card->private_free = efw_card_free;
efw->card = card;
efw->unit = unit;
mutex_init(&efw->mutex);
spin_lock_init(&efw->lock);
init_waitqueue_head(&efw->hwdep_wait);
/* prepare response buffer */
snd_efw_resp_buf_size = clamp(snd_efw_resp_buf_size,
SND_EFW_RESPONSE_MAXIMUM_BYTES, 4096U);
efw->resp_buf = kzalloc(snd_efw_resp_buf_size, GFP_KERNEL);
if (efw->resp_buf == NULL) {
err = -ENOMEM;
goto error;
}
efw->pull_ptr = efw->push_ptr = efw->resp_buf;
snd_efw_transaction_add_instance(efw);
err = get_hardware_info(efw);
if (err < 0)
goto error;
if (entry->model_id == MODEL_ECHO_AUDIOFIRE_9)
efw->is_af9 = true;
snd_efw_proc_init(efw);
if (efw->midi_out_ports || efw->midi_in_ports) {
err = snd_efw_create_midi_devices(efw);
if (err < 0)
goto error;
}
err = snd_efw_create_pcm_devices(efw);
if (err < 0)
goto error;
err = snd_efw_create_hwdep_device(efw);
if (err < 0)
goto error;
err = snd_efw_stream_init_duplex(efw);
if (err < 0)
goto error;
err = snd_card_register(card);
if (err < 0) {
snd_efw_stream_destroy_duplex(efw);
goto error;
}
dev_set_drvdata(&unit->device, efw);
end:
mutex_unlock(&devices_mutex);
return err;
error:
snd_efw_transaction_remove_instance(efw);
mutex_unlock(&devices_mutex);
snd_card_free(card);
return err;
}