| #ifndef __USBAUDIO_CARD_H |
| #define __USBAUDIO_CARD_H |
| |
| #define MAX_NR_RATES 1024 |
| #define MAX_PACKS 20 |
| #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */ |
| #define MAX_URBS 8 |
| #define SYNC_URBS 4 /* always four urbs for sync */ |
| #define MAX_QUEUE 24 /* 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 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_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_urb_ops { |
| int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); |
| int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); |
| int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); |
| int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); |
| }; |
| |
| 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 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 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, alt_idx; |
| |
| 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) */ |
| unsigned int cur_rate; /* current rate (for hw_params callback) */ |
| unsigned int period_bytes; /* current period bytes (for hw_params callback) */ |
| unsigned int altset_idx; /* USB data format: index of alternate setting */ |
| unsigned int datapipe; /* the data i/o pipe */ |
| unsigned int syncpipe; /* 1 - async out or adaptive in */ |
| unsigned int datainterval; /* log_2 of data packet interval */ |
| unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */ |
| 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 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 txfr_quirk:1; /* allow sub-frame alignment */ |
| unsigned int fmt_type; /* USB audio format type (1-3) */ |
| |
| 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 long active_mask; /* bitmask of active urbs */ |
| unsigned long unlink_mask; /* bitmask of unlinked urbs */ |
| |
| unsigned int nurbs; /* # urbs */ |
| struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */ |
| struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */ |
| char *syncbuf; /* sync buffer for all sync URBs */ |
| dma_addr_t sync_dma; /* DMA address of syncbuf */ |
| |
| 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; |
| |
| struct snd_urb_ops ops; /* callbacks (must be filled at init) */ |
| int last_frame_number; /* stored frame number */ |
| int last_delay; /* stored delay */ |
| }; |
| |
| 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 */ |