1#ifndef __USBAUDIO_CARD_H 2#define __USBAUDIO_CARD_H 3 4#define MAX_PACKS 20 5#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */ 6#define MAX_URBS 8 7#define SYNC_URBS 4 /* always four urbs for sync */ 8#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */ 9 10struct audioformat { 11 struct list_head list; 12 u64 formats; /* ALSA format bits */ 13 unsigned int channels; /* # channels */ 14 unsigned int fmt_type; /* USB audio format type (1-3) */ 15 unsigned int frame_size; /* samples per frame for non-audio */ 16 int iface; /* interface number */ 17 unsigned char altsetting; /* corresponding alternate setting */ 18 unsigned char altset_idx; /* array index of altenate setting */ 19 unsigned char attributes; /* corresponding attributes of cs endpoint */ 20 unsigned char endpoint; /* endpoint */ 21 unsigned char ep_attr; /* endpoint attributes */ 22 unsigned char datainterval; /* log_2 of data packet interval */ 23 unsigned int maxpacksize; /* max. packet size */ 24 unsigned int rates; /* rate bitmasks */ 25 unsigned int rate_min, rate_max; /* min/max rates */ 26 unsigned int nr_rates; /* number of rate table entries */ 27 unsigned int *rate_table; /* rate table */ 28 unsigned char clock; /* associated clock */ 29}; 30 31struct snd_usb_substream; 32 33struct snd_urb_ctx { 34 struct urb *urb; 35 unsigned int buffer_size; /* size of data buffer, if data URB */ 36 struct snd_usb_substream *subs; 37 int index; /* index for urb array */ 38 int packets; /* number of packets per urb */ 39}; 40 41struct snd_urb_ops { 42 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); 43 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); 44 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); 45 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); 46}; 47 48struct snd_usb_substream { 49 struct snd_usb_stream *stream; 50 struct usb_device *dev; 51 struct snd_pcm_substream *pcm_substream; 52 int direction; /* playback or capture */ 53 int interface; /* current interface */ 54 int endpoint; /* assigned endpoint */ 55 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ 56 unsigned int cur_rate; /* current rate (for hw_params callback) */ 57 unsigned int period_bytes; /* current period bytes (for hw_params callback) */ 58 unsigned int altset_idx; /* USB data format: index of alternate setting */ 59 unsigned int datapipe; /* the data i/o pipe */ 60 unsigned int syncpipe; /* 1 - async out or adaptive in */ 61 unsigned int datainterval; /* log_2 of data packet interval */ 62 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */ 63 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */ 64 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */ 65 int freqshift; /* how much to shift the feedback value to get Q16.16 */ 66 unsigned int freqmax; /* maximum sampling rate, used for buffer management */ 67 unsigned int phase; /* phase accumulator */ 68 unsigned int maxpacksize; /* max packet size in bytes */ 69 unsigned int maxframesize; /* max packet size in frames */ 70 unsigned int curpacksize; /* current packet size in bytes (for capture) */ 71 unsigned int curframesize; /* current packet size in frames (for capture) */ 72 unsigned int syncmaxsize; /* sync endpoint packet size */ 73 unsigned int fill_max: 1; /* fill max packet size always */ 74 unsigned int txfr_quirk:1; /* allow sub-frame alignment */ 75 unsigned int fmt_type; /* USB audio format type (1-3) */ 76 77 unsigned int running: 1; /* running status */ 78 79 unsigned int hwptr_done; /* processed byte position in the buffer */ 80 unsigned int transfer_done; /* processed frames since last period update */ 81 unsigned long active_mask; /* bitmask of active urbs */ 82 unsigned long unlink_mask; /* bitmask of unlinked urbs */ 83 84 unsigned int nurbs; /* # urbs */ 85 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */ 86 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */ 87 char *syncbuf; /* sync buffer for all sync URBs */ 88 dma_addr_t sync_dma; /* DMA address of syncbuf */ 89 90 u64 formats; /* format bitmasks (all or'ed) */ 91 unsigned int num_formats; /* number of supported audio formats (list) */ 92 struct list_head fmt_list; /* format list */ 93 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */ 94 spinlock_t lock; 95 96 struct snd_urb_ops ops; /* callbacks (must be filled at init) */ 97}; 98 99struct snd_usb_stream { 100 struct snd_usb_audio *chip; 101 struct snd_pcm *pcm; 102 int pcm_index; 103 unsigned int fmt_type; /* USB audio format type (1-3) */ 104 struct snd_usb_substream substream[2]; 105 struct list_head list; 106}; 107 108#endif /* __USBAUDIO_CARD_H */ 109