Edit: firewire.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _SOUND_FIREWIRE_H_INCLUDED #define _SOUND_FIREWIRE_H_INCLUDED #include <linux/ioctl.h> #include <linux/types.h> /* events can be read() from the hwdep device */ #define SNDRV_FIREWIRE_EVENT_LOCK_STATUS 0x000010cc #define SNDRV_FIREWIRE_EVENT_DICE_NOTIFICATION 0xd1ce004e #define SNDRV_FIREWIRE_EVENT_EFW_RESPONSE 0x4e617475 #define SNDRV_FIREWIRE_EVENT_DIGI00X_MESSAGE 0x746e736c #define SNDRV_FIREWIRE_EVENT_MOTU_NOTIFICATION 0x64776479 #define SNDRV_FIREWIRE_EVENT_TASCAM_CONTROL 0x7473636d #define SNDRV_FIREWIRE_EVENT_MOTU_REGISTER_DSP_CHANGE 0x4d545244 #define SNDRV_FIREWIRE_EVENT_FF400_MESSAGE 0x4f6c6761 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 */ }; #define SND_EFW_TRANSACTION_USER_SEQNUM_MAX ((__u32)((__u16)~0) - 1) /* each field should be in big endian */ struct snd_efw_transaction { __be32 length; __be32 version; __be32 seqnum; __be32 category; __be32 command; __be32 status; __be32 params[0]; }; struct snd_firewire_event_efw_response { unsigned int type; __be32 response[0]; /* some responses */ }; struct snd_firewire_event_digi00x_message { unsigned int type; __u32 message; /* Digi00x-specific message */ }; struct snd_firewire_event_motu_notification { unsigned int type; __u32 message; /* MOTU-specific bits. */ }; struct snd_firewire_tascam_change { unsigned int index; __be32 before; __be32 after; }; struct snd_firewire_event_tascam_control { unsigned int type; struct snd_firewire_tascam_change changes[0]; }; struct snd_firewire_event_motu_register_dsp_change { unsigned int type; __u32 count; /* The number of changes. */ __u32 changes[]; /* Encoded event for change of register DSP. */ }; /** * struct snd_firewire_event_ff400_message - the container for message from Fireface 400 when * operating hardware knob. * * @type: Fixed to SNDRV_FIREWIRE_EVENT_FF400_MESSAGE. * @message_count: The number of messages. * @messages.message: The messages expressing hardware knob operation. * @messages.tstamp: The isochronous cycle at which the request subaction of asynchronous * transaction was sent to deliver the message. It has 16 bit unsigned integer * value. The higher 3 bits of value expresses the lower three bits of second * field in the format of CYCLE_TIME, up to 7. The rest 13 bits expresses cycle * field up to 7999. * * The structure expresses message transmitted by Fireface 400 when operating hardware knob. */ struct snd_firewire_event_ff400_message { unsigned int type; unsigned int message_count; struct { __u32 message; __u32 tstamp; } messages[]; }; 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; struct snd_firewire_event_efw_response efw_response; struct snd_firewire_event_digi00x_message digi00x_message; struct snd_firewire_event_tascam_control tascam_control; struct snd_firewire_event_motu_notification motu_notification; struct snd_firewire_event_motu_register_dsp_change motu_register_dsp_change; struct snd_firewire_event_ff400_message ff400_message; }; #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_IOCTL_TASCAM_STATE _IOR('H', 0xfb, struct snd_firewire_tascam_state) #define SNDRV_FIREWIRE_IOCTL_MOTU_REGISTER_DSP_METER _IOR('H', 0xfc, struct snd_firewire_motu_register_dsp_meter) #define SNDRV_FIREWIRE_IOCTL_MOTU_COMMAND_DSP_METER _IOR('H', 0xfd, struct snd_firewire_motu_command_dsp_meter) #define SNDRV_FIREWIRE_IOCTL_MOTU_REGISTER_DSP_PARAMETER _IOR('H', 0xfe, struct snd_firewire_motu_register_dsp_parameter) #define SNDRV_FIREWIRE_TYPE_DICE 1 #define SNDRV_FIREWIRE_TYPE_FIREWORKS 2 #define SNDRV_FIREWIRE_TYPE_BEBOB 3 #define SNDRV_FIREWIRE_TYPE_OXFW 4 #define SNDRV_FIREWIRE_TYPE_DIGI00X 5 #define SNDRV_FIREWIRE_TYPE_TASCAM 6 #define SNDRV_FIREWIRE_TYPE_MOTU 7 #define SNDRV_FIREWIRE_TYPE_FIREFACE 8 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. */ #define SNDRV_FIREWIRE_TASCAM_STATE_COUNT 64 struct snd_firewire_tascam_state { __be32 data[SNDRV_FIREWIRE_TASCAM_STATE_COUNT]; }; /* * In below MOTU models, software is allowed to control their DSP by accessing to registers. * - 828mk2 * - 896hd * - Traveler * - 8 pre * - Ultralite * - 4 pre * - Audio Express * * On the other hand, the status of DSP is split into specific messages included in the sequence of * isochronous packet. ALSA firewire-motu driver gathers the messages and allow userspace applications * to read it via ioctl. In 828mk2, 896hd, and Traveler, hardware meter for all of physical inputs * are put into the message, while one pair of physical outputs is selected. The selection is done by * LSB one byte in asynchronous write quadlet transaction to 0x'ffff'f000'0b2c. * * I note that V3HD/V4HD uses asynchronous transaction for the purpose. The destination address is * registered to 0x'ffff'f000'0b38 and '0b3c by asynchronous write quadlet request. The size of * message differs between 23 and 51 quadlets. For the case, the number of mixer bus can be extended * up to 12. */ #define SNDRV_FIREWIRE_MOTU_REGISTER_DSP_METER_INPUT_COUNT 24 #define SNDRV_FIREWIRE_MOTU_REGISTER_DSP_METER_OUTPUT_COUNT 24 #define SNDRV_FIREWIRE_MOTU_REGISTER_DSP_METER_COUNT \ (SNDRV_FIREWIRE_MOTU_REGISTER_DSP_METER_INPUT_COUNT + SNDRV_FIREWIRE_MOTU_REGISTER_DSP_METER_OUTPUT_COUNT) /** * struct snd_firewire_motu_register_dsp_meter - the container for meter information in DSP * controlled by register access * @data: Signal level meters. The mapping between position and input/output channel is * model-dependent. * * The structure expresses the part of DSP status for hardware meter. The u8 storage includes linear * value for audio signal level between 0x00 and 0x7f. */ struct snd_firewire_motu_register_dsp_meter { __u8 data[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_METER_COUNT]; }; #define SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_COUNT 4 #define SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_SRC_COUNT 20 #define SNDRV_FIREWIRE_MOTU_REGISTER_DSP_INPUT_COUNT 10 #define SNDRV_FIREWIRE_MOTU_REGISTER_DSP_ALIGNED_INPUT_COUNT (SNDRV_FIREWIRE_MOTU_REGISTER_DSP_INPUT_COUNT + 2) /** * snd_firewire_motu_register_dsp_parameter - the container for parameters of DSP controlled * by register access. * @mixer.source.gain: The gain of source to mixer. * @mixer.source.pan: The L/R balance of source to mixer. * @mixer.source.flag: The flag of source to mixer, including mute, solo. * @mixer.source.paired_balance: The L/R balance of paired source to mixer, only for 4 pre and * Audio Express. * @mixer.source.paired_width: The width of paired source to mixer, only for 4 pre and * Audio Express. * @mixer.output.paired_volume: The volume of paired output from mixer. * @mixer.output.paired_flag: The flag of paired output from mixer. * @output.main_paired_volume: The volume of paired main output. * @output.hp_paired_volume: The volume of paired hp output. * @output.hp_paired_assignment: The source assigned to paired hp output. * @output.reserved: Padding for 32 bit alignment for future extension. * @line_input.boost_flag: The flags of boost for line inputs, only for 828mk2 and Traveler. * @line_input.nominal_level_flag: The flags of nominal level for line inputs, only for 828mk2 and * Traveler. * @line_input.reserved: Padding for 32 bit alignment for future extension. * @input.gain_and_invert: The value including gain and invert for input, only for Ultralite, 4 pre * and Audio Express. * @input.flag: The flag of input; e.g. jack detection, phantom power, and pad, only for Ultralite, * 4 pre and Audio express. * @reserved: Padding so that the size of structure is kept to 512 byte, but for future extension. * * The structure expresses the set of parameters for DSP controlled by register access. */ struct snd_firewire_motu_register_dsp_parameter { struct { struct { __u8 gain[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_SRC_COUNT]; __u8 pan[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_SRC_COUNT]; __u8 flag[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_SRC_COUNT]; __u8 paired_balance[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_SRC_COUNT]; __u8 paired_width[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_SRC_COUNT]; } source[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_COUNT]; struct { __u8 paired_volume[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_COUNT]; __u8 paired_flag[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_MIXER_COUNT]; } output; } mixer; struct { __u8 main_paired_volume; __u8 hp_paired_volume; __u8 hp_paired_assignment; __u8 reserved[5]; } output; struct { __u8 boost_flag; __u8 nominal_level_flag; __u8 reserved[6]; } line_input; struct { __u8 gain_and_invert[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_ALIGNED_INPUT_COUNT]; __u8 flag[SNDRV_FIREWIRE_MOTU_REGISTER_DSP_ALIGNED_INPUT_COUNT]; } input; __u8 reserved[64]; }; /* * In below MOTU models, software is allowed to control their DSP by command in frame of * asynchronous transaction to 0x'ffff'0001'0000: * * - 828 mk3 (FireWire only and Hybrid) * - 896 mk3 (FireWire only and Hybrid) * - Ultralite mk3 (FireWire only and Hybrid) * - Traveler mk3 * - Track 16 * * On the other hand, the states of hardware meter is split into specific messages included in the * sequence of isochronous packet. ALSA firewire-motu driver gathers the message and allow userspace * application to read it via ioctl. */ #define SNDRV_FIREWIRE_MOTU_COMMAND_DSP_METER_COUNT 400 /** * struct snd_firewire_motu_command_dsp_meter - the container for meter information in DSP * controlled by command * @data: Signal level meters. The mapping between position and signal channel is model-dependent. * * The structure expresses the part of DSP status for hardware meter. The 32 bit storage is * estimated to include IEEE 764 32 bit single precision floating point (binary32) value. It is * expected to be linear value (not logarithm) for audio signal level between 0.0 and +1.0. */ struct snd_firewire_motu_command_dsp_meter { float data[SNDRV_FIREWIRE_MOTU_COMMAND_DSP_METER_COUNT]; }; #endif /* _SOUND_FIREWIRE_H_INCLUDED */
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