[alsa-devel] [PATCH 01/18] ALSA: firewire-motu: add skeleton for Mark of the unicorn (MOTU) FireWire series
Takashi Sakamoto
o-takashi at sakamocchi.jp
Wed Mar 22 13:30:11 CET 2017
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: Takashi Sakamoto <o-takashi at sakamocchi.jp>
---
sound/firewire/Kconfig | 10 ++++
sound/firewire/Makefile | 1 +
sound/firewire/motu/Makefile | 2 +
sound/firewire/motu/motu.c | 134 +++++++++++++++++++++++++++++++++++++++++++
sound/firewire/motu/motu.h | 29 ++++++++++
5 files changed, 176 insertions(+)
create mode 100644 sound/firewire/motu/Makefile
create mode 100644 sound/firewire/motu/motu.c
create mode 100644 sound/firewire/motu/motu.h
diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig
index 9f00696..11a3285 100644
--- a/sound/firewire/Kconfig
+++ b/sound/firewire/Kconfig
@@ -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
diff --git a/sound/firewire/Makefile b/sound/firewire/Makefile
index 0ee1fb1..9388ded 100644
--- a/sound/firewire/Makefile
+++ b/sound/firewire/Makefile
@@ -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-$(CONFIG_SND_FIREWIRE_MOTU) += motu/
diff --git a/sound/firewire/motu/Makefile b/sound/firewire/motu/Makefile
new file mode 100644
index 0000000..d7819d5
--- /dev/null
+++ b/sound/firewire/motu/Makefile
@@ -0,0 +1,2 @@
+snd-firewire-motu-objs := motu.o
+obj-$(CONFIG_SND_FIREWIRE_MOTU) += snd-firewire-motu.o
diff --git a/sound/firewire/motu/motu.c b/sound/firewire/motu/motu.c
new file mode 100644
index 0000000..2684e74
--- /dev/null
+++ b/sound/firewire/motu/motu.c
@@ -0,0 +1,134 @@
+/*
+ * motu.c - a part of driver for MOTU FireWire series
+ *
+ * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi at 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 at 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);
diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h
new file mode 100644
index 0000000..f3d0b28
--- /dev/null
+++ b/sound/firewire/motu/motu.h
@@ -0,0 +1,29 @@
+/*
+ * motu.h - a part of driver for MOTU FireWire series
+ *
+ * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi at 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
--
2.9.3
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