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: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig
index 9f00696c4e4a1dc1b1ec8204ca680871c3341ce3..11a3285a20b37ebbd59840334f43e2345fd73cfc 100644 (file)
--- 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 0ee1fb115d8833bb076b74079de1b1222d8d98e3..9388ded69468367021534f2871d0df6cc9269cdb 100644 (file)
--- 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 (file)
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 (file)
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@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);

diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h
new file mode 100644 (file)
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@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