diff options
Diffstat (limited to 'sound/usb/card.h')
| -rw-r--r-- | sound/usb/card.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/sound/usb/card.h b/sound/usb/card.h new file mode 100644 index 000000000000..ed92420c1095 --- /dev/null +++ b/sound/usb/card.h | |||
| @@ -0,0 +1,105 @@ | |||
| 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 | |||
| 10 | struct 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 | }; | ||
| 29 | |||
| 30 | struct snd_usb_substream; | ||
| 31 | |||
| 32 | struct snd_urb_ctx { | ||
| 33 | struct urb *urb; | ||
| 34 | unsigned int buffer_size; /* size of data buffer, if data URB */ | ||
| 35 | struct snd_usb_substream *subs; | ||
| 36 | int index; /* index for urb array */ | ||
| 37 | int packets; /* number of packets per urb */ | ||
| 38 | }; | ||
| 39 | |||
| 40 | struct snd_urb_ops { | ||
| 41 | int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); | ||
| 42 | int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); | ||
| 43 | int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); | ||
| 44 | int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u); | ||
| 45 | }; | ||
| 46 | |||
| 47 | struct snd_usb_substream { | ||
| 48 | struct snd_usb_stream *stream; | ||
| 49 | struct usb_device *dev; | ||
| 50 | struct snd_pcm_substream *pcm_substream; | ||
| 51 | int direction; /* playback or capture */ | ||
| 52 | int interface; /* current interface */ | ||
| 53 | int endpoint; /* assigned endpoint */ | ||
| 54 | struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ | ||
| 55 | unsigned int cur_rate; /* current rate (for hw_params callback) */ | ||
| 56 | unsigned int period_bytes; /* current period bytes (for hw_params callback) */ | ||
| 57 | unsigned int altset_idx; /* USB data format: index of alternate setting */ | ||
| 58 | unsigned int datapipe; /* the data i/o pipe */ | ||
| 59 | unsigned int syncpipe; /* 1 - async out or adaptive in */ | ||
| 60 | unsigned int datainterval; /* log_2 of data packet interval */ | ||
| 61 | unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */ | ||
| 62 | unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */ | ||
| 63 | unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */ | ||
| 64 | unsigned int freqmax; /* maximum sampling rate, used for buffer management */ | ||
| 65 | unsigned int phase; /* phase accumulator */ | ||
| 66 | unsigned int maxpacksize; /* max packet size in bytes */ | ||
| 67 | unsigned int maxframesize; /* max packet size in frames */ | ||
| 68 | unsigned int curpacksize; /* current packet size in bytes (for capture) */ | ||
| 69 | unsigned int curframesize; /* current packet size in frames (for capture) */ | ||
| 70 | unsigned int fill_max: 1; /* fill max packet size always */ | ||
| 71 | unsigned int txfr_quirk:1; /* allow sub-frame alignment */ | ||
| 72 | unsigned int fmt_type; /* USB audio format type (1-3) */ | ||
| 73 | |||
| 74 | unsigned int running: 1; /* running status */ | ||
| 75 | |||
| 76 | unsigned int hwptr_done; /* processed byte position in the buffer */ | ||
| 77 | unsigned int transfer_done; /* processed frames since last period update */ | ||
| 78 | unsigned long active_mask; /* bitmask of active urbs */ | ||
| 79 | unsigned long unlink_mask; /* bitmask of unlinked urbs */ | ||
| 80 | |||
| 81 | unsigned int nurbs; /* # urbs */ | ||
| 82 | struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */ | ||
| 83 | struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */ | ||
| 84 | char *syncbuf; /* sync buffer for all sync URBs */ | ||
| 85 | dma_addr_t sync_dma; /* DMA address of syncbuf */ | ||
| 86 | |||
| 87 | u64 formats; /* format bitmasks (all or'ed) */ | ||
| 88 | unsigned int num_formats; /* number of supported audio formats (list) */ | ||
| 89 | struct list_head fmt_list; /* format list */ | ||
| 90 | struct snd_pcm_hw_constraint_list rate_list; /* limited rates */ | ||
| 91 | spinlock_t lock; | ||
| 92 | |||
| 93 | struct snd_urb_ops ops; /* callbacks (must be filled at init) */ | ||
| 94 | }; | ||
| 95 | |||
| 96 | struct snd_usb_stream { | ||
| 97 | struct snd_usb_audio *chip; | ||
| 98 | struct snd_pcm *pcm; | ||
| 99 | int pcm_index; | ||
| 100 | unsigned int fmt_type; /* USB audio format type (1-3) */ | ||
| 101 | struct snd_usb_substream substream[2]; | ||
| 102 | struct list_head list; | ||
| 103 | }; | ||
| 104 | |||
| 105 | #endif /* __USBAUDIO_CARD_H */ | ||