208 lines
8.1 KiB
C
208 lines
8.1 KiB
C
/* 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 */
|