/* 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_clock_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;
struct snd_usb_clock_ref *clock_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 hw_params? */
bool need_prepare; /* (re-)need for prepare? */
bool fixed_rate; /* skip rate setup */
/* 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;
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 */
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