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authorClemens Ladisch <clemens@ladisch.de>2011-09-04 22:04:49 +0200
committerClemens Ladisch <clemens@ladisch.de>2013-10-17 21:18:32 +0200
commit82fbb4f7b47683077e0716474d4f1ce65a2146cb (patch)
tree46dd007994f8e15bee2473e10ef6ef0e007e8fc7 /include/uapi/sound/firewire.h
parent6e4664525b1db28f8c4e1130957f70a94c19213e (diff)
ALSA: add DICE driver
As a start point for further development, this is an incomplete driver for DICE devices: - only playback (so no clock source except the bus clock) - only 44.1 kHz - no MIDI - recovery after bus reset is slow - hwdep device is created, but not actually implemented Contains compilation fixes by Stefan Richter. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Diffstat (limited to 'include/uapi/sound/firewire.h')
-rw-r--r--include/uapi/sound/firewire.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/include/uapi/sound/firewire.h b/include/uapi/sound/firewire.h
new file mode 100644
index 000000000000..e86131ca49e5
--- /dev/null
+++ b/include/uapi/sound/firewire.h
@@ -0,0 +1,51 @@
+#ifndef UAPI_SOUND_FIREWIRE_H_INCLUDED
+#define UAPI_SOUND_FIREWIRE_H_INCLUDED
+
+#include <linux/ioctl.h>
+
+/* events can be read() from the hwdep device */
+
+#define SNDRV_FIREWIRE_EVENT_LOCK_STATUS 0x000010cc
+#define SNDRV_FIREWIRE_EVENT_DICE_NOTIFICATION 0xd1ce004e
+
+struct snd_firewire_event_common {
+ unsigned int type; /* SNDRV_FIREWIRE_EVENT_xxx */
+};
+
+struct snd_firewire_event_lock_status {
+ unsigned int type;
+ unsigned int status; /* 0/1 = unlocked/locked */
+};
+
+struct snd_firewire_event_dice_notification {
+ unsigned int type;
+ unsigned int notification; /* DICE-specific bits */
+};
+
+union snd_firewire_event {
+ struct snd_firewire_event_common common;
+ struct snd_firewire_event_lock_status lock_status;
+ struct snd_firewire_event_dice_notification dice_notification;
+};
+
+
+#define SNDRV_FIREWIRE_IOCTL_GET_INFO _IOR('H', 0xf8, struct snd_firewire_get_info)
+#define SNDRV_FIREWIRE_IOCTL_LOCK _IO('H', 0xf9)
+#define SNDRV_FIREWIRE_IOCTL_UNLOCK _IO('H', 0xfa)
+
+#define SNDRV_FIREWIRE_TYPE_DICE 1
+/* Fireworks, AV/C, RME, MOTU, ... */
+
+struct snd_firewire_get_info {
+ unsigned int type; /* SNDRV_FIREWIRE_TYPE_xxx */
+ unsigned int card; /* same as fw_cdev_get_info.card */
+ unsigned char guid[8];
+ char device_name[16]; /* device node in /dev */
+};
+
+/*
+ * SNDRV_FIREWIRE_IOCTL_LOCK prevents the driver from streaming.
+ * Returns -EBUSY if the driver is already streaming.
+ */
+
+#endif

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