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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 | unsigned char clock; /* associated clock */ |
29 | }; |
30 | |
31 | struct snd_usb_substream; |
32 | |
33 | struct 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 | |
41 | struct 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 | |
48 | struct 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 | |
99 | struct 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 |
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