Commit 6c3cef48 authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
Browse files

ALSA: firewire-motu: add skeleton for Mark of the unicorn (MOTU) FireWire series



This commit adds an new driver for MOTU FireWire series. In this commit,
this driver just creates/removes card instance according to bus event.
More functionalities will be added in following commits.
Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 13f99ebd
......@@ -140,4 +140,14 @@ config SND_FIREWIRE_TASCAM
To compile this driver as a module, choose M here: the module
will be called snd-firewire-tascam.
config SND_FIREWIRE_MOTU
tristate "Mark of the unicorn FireWire series support"
select SND_FIREWIRE_LIB
select SND_HWDEP
help
Say Y here to enable support for FireWire devices which MOTU produced:
To compile this driver as a module, choose M here: the module
will be called snd-firewire-motu.
endif # SND_FIREWIRE
......@@ -13,3 +13,4 @@ obj-$(CONFIG_SND_FIREWORKS) += fireworks/
obj-$(CONFIG_SND_BEBOB) += bebob/
obj-$(CONFIG_SND_FIREWIRE_DIGI00X) += digi00x/
obj-$(CONFIG_SND_FIREWIRE_TASCAM) += tascam/
obj-$(CONFIG_SND_FIREWIRE_MOTU) += motu/
snd-firewire-motu-objs := motu.o
obj-$(CONFIG_SND_FIREWIRE_MOTU) += snd-firewire-motu.o
/*
* motu.c - a part of driver for MOTU FireWire series
*
* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "motu.h"
#define OUI_MOTU 0x0001f2
MODULE_DESCRIPTION("MOTU FireWire driver");
MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
MODULE_LICENSE("GPL v2");
static void name_card(struct snd_motu *motu)
{
struct fw_device *fw_dev = fw_parent_device(motu->unit);
struct fw_csr_iterator it;
int key, val;
u32 version = 0;
fw_csr_iterator_init(&it, motu->unit->directory);
while (fw_csr_iterator_next(&it, &key, &val)) {
switch (key) {
case CSR_VERSION:
version = val;
break;
}
}
strcpy(motu->card->driver, "FW-MOTU");
snprintf(motu->card->longname, sizeof(motu->card->longname),
"MOTU (version:%d), GUID %08x%08x at %s, S%d",
version,
fw_dev->config_rom[3], fw_dev->config_rom[4],
dev_name(&motu->unit->device), 100 << fw_dev->max_speed);
}
static void motu_card_free(struct snd_card *card)
{
struct snd_motu *motu = card->private_data;
fw_unit_put(motu->unit);
mutex_destroy(&motu->mutex);
}
static int motu_probe(struct fw_unit *unit,
const struct ieee1394_device_id *entry)
{
struct snd_card *card;
struct snd_motu *motu;
int err;
err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE,
sizeof(*motu), &card);
if (err < 0)
return err;
motu = card->private_data;
motu->card = card;
motu->unit = fw_unit_get(unit);
card->private_free = motu_card_free;
mutex_init(&motu->mutex);
name_card(motu);
err = snd_card_register(card);
if (err < 0)
goto error;
dev_set_drvdata(&unit->device, motu);
return 0;
error:
snd_card_free(card);
return err;
}
static void motu_remove(struct fw_unit *unit)
{
struct snd_motu *motu = dev_get_drvdata(&unit->device);
/* No need to wait for releasing card object in this context. */
snd_card_free_when_closed(motu->card);
}
static void motu_bus_update(struct fw_unit *unit)
{
return;
}
#define SND_MOTU_DEV_ENTRY(model) \
{ \
.match_flags = IEEE1394_MATCH_VENDOR_ID | \
IEEE1394_MATCH_MODEL_ID | \
IEEE1394_MATCH_SPECIFIER_ID, \
.vendor_id = OUI_MOTU, \
.model_id = model, \
.specifier_id = OUI_MOTU, \
}
static const struct ieee1394_device_id motu_id_table[] = {
{ }
};
MODULE_DEVICE_TABLE(ieee1394, motu_id_table);
static struct fw_driver motu_driver = {
.driver = {
.owner = THIS_MODULE,
.name = KBUILD_MODNAME,
.bus = &fw_bus_type,
},
.probe = motu_probe,
.update = motu_bus_update,
.remove = motu_remove,
.id_table = motu_id_table,
};
static int __init alsa_motu_init(void)
{
return driver_register(&motu_driver.driver);
}
static void __exit alsa_motu_exit(void)
{
driver_unregister(&motu_driver.driver);
}
module_init(alsa_motu_init);
module_exit(alsa_motu_exit);
/*
* motu.h - a part of driver for MOTU FireWire series
*
* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#ifndef SOUND_FIREWIRE_MOTU_H_INCLUDED
#define SOUND_FIREWIRE_MOTU_H_INCLUDED
#include <linux/device.h>
#include <linux/firewire.h>
#include <linux/firewire-constants.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <sound/control.h>
#include <sound/core.h>
struct snd_motu {
struct snd_card *card;
struct fw_unit *unit;
struct mutex mutex;
};
#endif
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