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Commit 82fbb4f7 authored by Clemens Ladisch's avatar Clemens Ladisch
Browse files

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: default avatarClemens Ladisch <clemens@ladisch.de>
parent 6e466452

Documentation/ioctl/ioctl-number.txt

+1 −0
Original line number Diff line number Diff line
@@ -138,6 +138,7 @@ Code Seq#(hex) Include File Comments 
'H'	C0-DF	net/bluetooth/cmtp/cmtp.h	conflict!

'H'	C0-DF	net/bluetooth/bnep/bnep.h	conflict!

'H'	F1	linux/hid-roccat.h	<mailto:erazor_de@users.sourceforge.net>

'H'	F8-FA	sound/firewire.h

'I'	all	linux/isdn.h		conflict!

'I'	00-0F	drivers/isdn/divert/isdn_divert.h	conflict!

'I'	40-4F	linux/mISDNif.h		conflict!

include/uapi/sound/Kbuild

+1 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ header-y += asound_fm.h 
header-y += compress_offload.h

header-y += compress_params.h

header-y += emu10k1.h

header-y += firewire.h

header-y += hdsp.h

header-y += hdspm.h

header-y += sb16_csp.h

include/uapi/sound/asound.h

+2 −1
Original line number Diff line number Diff line
@@ -93,9 +93,10 @@ enum { 
	SNDRV_HWDEP_IFACE_SB_RC,	/* SB Extigy/Audigy2NX remote control */

	SNDRV_HWDEP_IFACE_HDA,		/* HD-audio */

	SNDRV_HWDEP_IFACE_USB_STREAM,	/* direct access to usb stream */

	SNDRV_HWDEP_IFACE_FW_DICE,	/* TC DICE FireWire device */



	/* Don't forget to change the following: */

	SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_USB_STREAM

	SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_DICE

};



struct snd_hwdep_info {

include/uapi/sound/firewire.h

0 → 100644
+51 −0
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#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

sound/firewire/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -11,6 +11,19 @@ config SND_FIREWIRE_LIB 
	tristate

	depends on SND_PCM



config SND_DICE

	tristate "DICE devices (EXPERIMENTAL)"

	select SND_HWDEP

	select SND_PCM

	select SND_FIREWIRE_LIB

	help

	  Say Y here to include support for many FireWire audio interfaces

	  based on the DICE chip family (DICE-II/Jr/Mini) from TC Applied

	  Technologies.



	  To compile this driver as a module, choose M here: the module

	  will be called snd-dice.



config SND_FIREWIRE_SPEAKERS

	tristate "FireWire speakers"

	select SND_PCM