diff options
Diffstat (limited to 'kernel/sound/usb/card.h')
| -rw-r--r-- | kernel/sound/usb/card.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/kernel/sound/usb/card.h b/kernel/sound/usb/card.h new file mode 100644 index 000000000..ef580b43f --- /dev/null +++ b/kernel/sound/usb/card.h @@ -0,0 +1,169 @@ +#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 frame_size; /* samples per frame for non-audio */ + int iface; /* interface number */ + unsigned char altsetting; /* corresponding alternate setting */ + unsigned char altset_idx; /* array index of altenate setting */ + unsigned char attributes; /* corresponding attributes of cs endpoint */ + unsigned char endpoint; /* endpoint */ + unsigned char ep_attr; /* endpoint attributes */ + unsigned char datainterval; /* log_2 of data packet interval */ + unsigned char protocol; /* UAC_VERSION_1/2 */ + 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 */ +}; + +struct snd_usb_substream; +struct snd_usb_endpoint; + +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 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; + + int use_count; + int ep_num; /* the referenced endpoint number */ + int type; /* SND_USB_ENDPOINT_TYPE_* */ + unsigned long flags; + + void (*prepare_data_urb) (struct snd_usb_substream *subs, + struct urb *urb); + void (*retire_data_urb) (struct snd_usb_substream *subs, + struct urb *urb); + + struct snd_usb_substream *data_subs; + struct snd_usb_endpoint *sync_master; + struct snd_usb_endpoint *sync_slave; + + 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]; + int next_packet_read_pos, next_packet_write_pos; + struct list_head ready_playback_urbs; + + unsigned int nurbs; /* # urbs */ + unsigned long active_mask; /* bitmask of active urbs */ + unsigned long unlink_mask; /* bitmask of unlinked 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 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 udh01_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 iface, altsetting; + int skip_packets; /* quirks for devices to ignore the first n packets + in a stream */ + + spinlock_t lock; + struct list_head list; +}; + +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 interface; /* current interface */ + int endpoint; /* assigned endpoint */ + struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ + snd_pcm_format_t pcm_format; /* current audio format (for hw_params callback) */ + unsigned int channels; /* current number of channels (for hw_params callback) */ + unsigned int channels_max; /* max channels in the all audiofmts */ + unsigned int cur_rate; /* current rate (for hw_params callback) */ + unsigned int period_bytes; /* current period bytes (for hw_params callback) */ + unsigned int period_frames; /* current frames per period */ + unsigned int buffer_periods; /* current periods per buffer */ + unsigned int altset_idx; /* USB data format: index of alternate setting */ + unsigned int txfr_quirk:1; /* allow sub-frame alignment */ + 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 running: 1; /* running status */ + + 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; + bool need_setup_ep; /* (re)configure EP at prepare? */ + 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 */ + struct snd_pcm_hw_constraint_list rate_list; /* limited rates */ + spinlock_t lock; + + int last_frame_number; /* stored frame number */ + int last_delay; /* stored delay */ + + struct { + int marker; + int channel; + int byte_idx; + } dsd_dop; + + bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */ +}; + +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 */ |