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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a8c0d13267
In former commits, ALSA firewire-tascam driver queues events to notify change of state of control surface to userspace via ALSA hwdep interface. This commit implements actual notification of the events. The events are not governed by real time, thus no need to care underrun. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_SOUND_FIREWIRE_H_INCLUDED
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#define _UAPI_SOUND_FIREWIRE_H_INCLUDED
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/* events can be read() from the hwdep device */
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#define SNDRV_FIREWIRE_EVENT_LOCK_STATUS 0x000010cc
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#define SNDRV_FIREWIRE_EVENT_DICE_NOTIFICATION 0xd1ce004e
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#define SNDRV_FIREWIRE_EVENT_EFW_RESPONSE 0x4e617475
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#define SNDRV_FIREWIRE_EVENT_DIGI00X_MESSAGE 0x746e736c
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#define SNDRV_FIREWIRE_EVENT_MOTU_NOTIFICATION 0x64776479
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#define SNDRV_FIREWIRE_EVENT_TASCAM_CONTROL 0x7473636d
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struct snd_firewire_event_common {
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unsigned int type; /* SNDRV_FIREWIRE_EVENT_xxx */
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};
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struct snd_firewire_event_lock_status {
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unsigned int type;
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unsigned int status; /* 0/1 = unlocked/locked */
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};
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struct snd_firewire_event_dice_notification {
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unsigned int type;
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unsigned int notification; /* DICE-specific bits */
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};
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#define SND_EFW_TRANSACTION_USER_SEQNUM_MAX ((__u32)((__u16)~0) - 1)
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/* each field should be in big endian */
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struct snd_efw_transaction {
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__be32 length;
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__be32 version;
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__be32 seqnum;
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__be32 category;
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__be32 command;
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__be32 status;
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__be32 params[0];
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};
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struct snd_firewire_event_efw_response {
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unsigned int type;
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__be32 response[0]; /* some responses */
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};
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struct snd_firewire_event_digi00x_message {
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unsigned int type;
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__u32 message; /* Digi00x-specific message */
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};
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struct snd_firewire_event_motu_notification {
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unsigned int type;
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__u32 message; /* MOTU-specific bits. */
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};
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struct snd_firewire_tascam_change {
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unsigned int index;
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__be32 before;
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__be32 after;
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};
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struct snd_firewire_event_tascam_control {
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unsigned int type;
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struct snd_firewire_tascam_change changes[0];
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};
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union snd_firewire_event {
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struct snd_firewire_event_common common;
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struct snd_firewire_event_lock_status lock_status;
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struct snd_firewire_event_dice_notification dice_notification;
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struct snd_firewire_event_efw_response efw_response;
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struct snd_firewire_event_digi00x_message digi00x_message;
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struct snd_firewire_event_tascam_control tascam_control;
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struct snd_firewire_event_motu_notification motu_notification;
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};
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#define SNDRV_FIREWIRE_IOCTL_GET_INFO _IOR('H', 0xf8, struct snd_firewire_get_info)
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#define SNDRV_FIREWIRE_IOCTL_LOCK _IO('H', 0xf9)
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#define SNDRV_FIREWIRE_IOCTL_UNLOCK _IO('H', 0xfa)
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#define SNDRV_FIREWIRE_IOCTL_TASCAM_STATE _IOR('H', 0xfb, struct snd_firewire_tascam_state)
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#define SNDRV_FIREWIRE_TYPE_DICE 1
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#define SNDRV_FIREWIRE_TYPE_FIREWORKS 2
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#define SNDRV_FIREWIRE_TYPE_BEBOB 3
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#define SNDRV_FIREWIRE_TYPE_OXFW 4
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#define SNDRV_FIREWIRE_TYPE_DIGI00X 5
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#define SNDRV_FIREWIRE_TYPE_TASCAM 6
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#define SNDRV_FIREWIRE_TYPE_MOTU 7
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#define SNDRV_FIREWIRE_TYPE_FIREFACE 8
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struct snd_firewire_get_info {
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unsigned int type; /* SNDRV_FIREWIRE_TYPE_xxx */
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unsigned int card; /* same as fw_cdev_get_info.card */
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unsigned char guid[8];
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char device_name[16]; /* device node in /dev */
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};
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/*
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* SNDRV_FIREWIRE_IOCTL_LOCK prevents the driver from streaming.
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* Returns -EBUSY if the driver is already streaming.
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*/
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#define SNDRV_FIREWIRE_TASCAM_STATE_COUNT 64
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struct snd_firewire_tascam_state {
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__be32 data[SNDRV_FIREWIRE_TASCAM_STATE_COUNT];
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};
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#endif /* _UAPI_SOUND_FIREWIRE_H_INCLUDED */
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