| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __USBAUDIO_CARD_H |
| #define __USBAUDIO_CARD_H |
| |
| #define MAX_NR_RATES 1024 |
| #define MAX_PACKS 6 /* per URB */ |
| #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */ |
| #define MAX_URBS 12 |
| #define SYNC_URBS 4 /* always four urbs for sync */ |
| #define MAX_QUEUE 18 /* try not to exceed this queue length, in ms */ |
| |
| struct audioformat { |
| struct list_head list; |
| u64 formats; /* ALSA format bits */ |
| unsigned int channels; /* # channels */ |
| unsigned int fmt_type; /* USB audio format type (1-3) */ |
| unsigned int fmt_bits; /* number of significant bits */ |
| unsigned int frame_size; /* samples per frame for non-audio */ |
| unsigned char iface; /* interface number */ |
| unsigned char altsetting; /* corresponding alternate setting */ |
| unsigned char ep_idx; /* endpoint array index */ |
| unsigned char altset_idx; /* array index of alternate setting */ |
| unsigned char attributes; /* corresponding attributes of cs endpoint */ |
| unsigned char endpoint; /* endpoint */ |
| unsigned char ep_attr; /* endpoint attributes */ |
| bool implicit_fb; /* implicit feedback endpoint */ |
| unsigned char sync_ep; /* sync endpoint number */ |
| unsigned char sync_iface; /* sync EP interface */ |
| unsigned char sync_altsetting; /* sync EP alternate setting */ |
| unsigned char sync_ep_idx; /* sync EP array index */ |
| unsigned char datainterval; /* log_2 of data packet interval */ |
| unsigned char protocol; /* UAC_VERSION_1/2/3 */ |
| unsigned int maxpacksize; /* max. packet size */ |
| unsigned int rates; /* rate bitmasks */ |
| unsigned int rate_min, rate_max; /* min/max rates */ |
| unsigned int nr_rates; /* number of rate table entries */ |
| unsigned int *rate_table; /* rate table */ |
| unsigned char clock; /* associated clock */ |
| struct snd_pcm_chmap_elem *chmap; /* (optional) channel map */ |
| bool dsd_dop; /* add DOP headers in case of DSD samples */ |
| bool dsd_bitrev; /* reverse the bits of each DSD sample */ |
| bool dsd_raw; /* altsetting is raw DSD */ |
| }; |
| |
| struct snd_usb_substream; |
| struct snd_usb_iface_ref; |
| struct snd_usb_endpoint; |
| struct snd_usb_power_domain; |
| |
| struct snd_urb_ctx { |
| struct urb *urb; |
| unsigned int buffer_size; /* size of data buffer, if data URB */ |
| struct snd_usb_substream *subs; |
| struct snd_usb_endpoint *ep; |
| int index; /* index for urb array */ |
| int packets; /* number of packets per urb */ |
| int queued; /* queued data bytes by this urb */ |
| int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */ |
| struct list_head ready_list; |
| }; |
| |
| struct snd_usb_endpoint { |
| struct snd_usb_audio *chip; |
| struct snd_usb_iface_ref *iface_ref; |
| |
| int opened; /* open refcount; protect with chip->mutex */ |
| atomic_t running; /* running status */ |
| int ep_num; /* the referenced endpoint number */ |
| int type; /* SND_USB_ENDPOINT_TYPE_* */ |
| |
| unsigned char iface; /* interface number */ |
| unsigned char altsetting; /* corresponding alternate setting */ |
| unsigned char ep_idx; /* endpoint array index */ |
| |
| atomic_t state; /* running state */ |
| |
| int (*prepare_data_urb) (struct snd_usb_substream *subs, |
| struct urb *urb, |
| bool in_stream_lock); |
| void (*retire_data_urb) (struct snd_usb_substream *subs, |
| struct urb *urb); |
| |
| struct snd_usb_substream *data_subs; |
| struct snd_usb_endpoint *sync_source; |
| struct snd_usb_endpoint *sync_sink; |
| |
| struct snd_urb_ctx urb[MAX_URBS]; |
| |
| struct snd_usb_packet_info { |
| uint32_t packet_size[MAX_PACKS_HS]; |
| int packets; |
| } next_packet[MAX_URBS]; |
| unsigned int next_packet_head; /* ring buffer offset to read */ |
| unsigned int next_packet_queued; /* queued items in the ring buffer */ |
| struct list_head ready_playback_urbs; /* playback URB FIFO for implicit fb */ |
| |
| unsigned int nurbs; /* # urbs */ |
| unsigned long active_mask; /* bitmask of active urbs */ |
| unsigned long unlink_mask; /* bitmask of unlinked urbs */ |
| atomic_t submitted_urbs; /* currently submitted urbs */ |
| char *syncbuf; /* sync buffer for all sync URBs */ |
| dma_addr_t sync_dma; /* DMA address of syncbuf */ |
| |
| unsigned int pipe; /* the data i/o pipe */ |
| unsigned int packsize[2]; /* small/large packet sizes in samples */ |
| unsigned int sample_rem; /* remainder from division fs/pps */ |
| unsigned int sample_accum; /* sample accumulator */ |
| unsigned int pps; /* packets per second */ |
| unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */ |
| unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */ |
| int freqshift; /* how much to shift the feedback value to get Q16.16 */ |
| unsigned int freqmax; /* maximum sampling rate, used for buffer management */ |
| unsigned int phase; /* phase accumulator */ |
| unsigned int maxpacksize; /* max packet size in bytes */ |
| unsigned int maxframesize; /* max packet size in frames */ |
| unsigned int max_urb_frames; /* max URB size in frames */ |
| unsigned int curpacksize; /* current packet size in bytes (for capture) */ |
| unsigned int curframesize; /* current packet size in frames (for capture) */ |
| unsigned int syncmaxsize; /* sync endpoint packet size */ |
| unsigned int fill_max:1; /* fill max packet size always */ |
| unsigned int tenor_fb_quirk:1; /* corrupted feedback data */ |
| unsigned int datainterval; /* log_2 of data packet interval */ |
| unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */ |
| unsigned char silence_value; |
| unsigned int stride; |
| int skip_packets; /* quirks for devices to ignore the first n packets |
| in a stream */ |
| bool implicit_fb_sync; /* syncs with implicit feedback */ |
| bool lowlatency_playback; /* low-latency playback mode */ |
| bool need_setup; /* (re-)need for configure? */ |
| |
| /* for hw constraints */ |
| const struct audioformat *cur_audiofmt; |
| unsigned int cur_rate; |
| snd_pcm_format_t cur_format; |
| unsigned int cur_channels; |
| unsigned int cur_frame_bytes; |
| unsigned int cur_period_frames; |
| unsigned int cur_period_bytes; |
| unsigned int cur_buffer_periods; |
| unsigned char cur_clock; |
| |
| spinlock_t lock; |
| struct list_head list; |
| }; |
| |
| struct media_ctl; |
| |
| struct snd_usb_substream { |
| struct snd_usb_stream *stream; |
| struct usb_device *dev; |
| struct snd_pcm_substream *pcm_substream; |
| int direction; /* playback or capture */ |
| int endpoint; /* assigned endpoint */ |
| const struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ |
| struct snd_usb_power_domain *str_pd; /* UAC3 Power Domain for streaming path */ |
| unsigned int channels_max; /* max channels in the all audiofmts */ |
| unsigned int txfr_quirk:1; /* allow sub-frame alignment */ |
| unsigned int tx_length_quirk:1; /* add length specifier to transfers */ |
| unsigned int fmt_type; /* USB audio format type (1-3) */ |
| unsigned int pkt_offset_adj; /* Bytes to drop from beginning of packets (for non-compliant devices) */ |
| unsigned int stream_offset_adj; /* Bytes to drop from beginning of stream (for non-compliant devices) */ |
| |
| unsigned int running: 1; /* running status */ |
| unsigned int period_elapsed_pending; /* delay period handling */ |
| |
| unsigned int buffer_bytes; /* buffer size in bytes */ |
| unsigned int inflight_bytes; /* in-flight data bytes on buffer (for playback) */ |
| unsigned int hwptr_done; /* processed byte position in the buffer */ |
| unsigned int transfer_done; /* processed frames since last period update */ |
| unsigned int frame_limit; /* limits number of packets in URB */ |
| |
| /* data and sync endpoints for this stream */ |
| unsigned int ep_num; /* the endpoint number */ |
| struct snd_usb_endpoint *data_endpoint; |
| struct snd_usb_endpoint *sync_endpoint; |
| unsigned long flags; |
| unsigned int speed; /* USB_SPEED_XXX */ |
| |
| u64 formats; /* format bitmasks (all or'ed) */ |
| unsigned int num_formats; /* number of supported audio formats (list) */ |
| struct list_head fmt_list; /* format list */ |
| spinlock_t lock; |
| |
| unsigned int last_frame_number; /* stored frame number */ |
| |
| struct { |
| int marker; |
| int channel; |
| int byte_idx; |
| } dsd_dop; |
| |
| bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */ |
| bool lowlatency_playback; /* low-latency playback mode */ |
| struct media_ctl *media_ctl; |
| }; |
| |
| struct snd_usb_stream { |
| struct snd_usb_audio *chip; |
| struct snd_pcm *pcm; |
| int pcm_index; |
| unsigned int fmt_type; /* USB audio format type (1-3) */ |
| struct snd_usb_substream substream[2]; |
| struct list_head list; |
| }; |
| |
| #endif /* __USBAUDIO_CARD_H */ |
