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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
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 */
1#ifndef __USBAUDIO_CARD_H
2#define __USBAUDIO_CARD_H
3
4#define MAX_NR_RATES 1024
5#define MAX_PACKS 20
6#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
7#define MAX_URBS 8
8#define SYNC_URBS 4 /* always four urbs for sync */
9#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
10
11struct audioformat {
12 struct list_head list;
13 u64 formats; /* ALSA format bits */
14 unsigned int channels; /* # channels */
15 unsigned int fmt_type; /* USB audio format type (1-3) */
16 unsigned int frame_size; /* samples per frame for non-audio */
17 int iface; /* interface number */
18 unsigned char altsetting; /* corresponding alternate setting */
19 unsigned char altset_idx; /* array index of altenate setting */
20 unsigned char attributes; /* corresponding attributes of cs endpoint */
21 unsigned char endpoint; /* endpoint */
22 unsigned char ep_attr; /* endpoint attributes */
23 unsigned char datainterval; /* log_2 of data packet interval */
24 unsigned int maxpacksize; /* max. packet size */
25 unsigned int rates; /* rate bitmasks */
26 unsigned int rate_min, rate_max; /* min/max rates */
27 unsigned int nr_rates; /* number of rate table entries */
28 unsigned int *rate_table; /* rate table */
29 unsigned char clock; /* associated clock */
30};
31
32struct snd_usb_substream;
33struct snd_usb_endpoint;
34
35struct snd_urb_ctx {
36 struct urb *urb;
37 unsigned int buffer_size; /* size of data buffer, if data URB */
38 struct snd_usb_substream *subs;
39 struct snd_usb_endpoint *ep;
40 int index; /* index for urb array */
41 int packets; /* number of packets per urb */
42 int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */
43 struct list_head ready_list;
44};
45
46struct snd_usb_endpoint {
47 struct snd_usb_audio *chip;
48
49 int use_count;
50 int ep_num; /* the referenced endpoint number */
51 int type; /* SND_USB_ENDPOINT_TYPE_* */
52 unsigned long flags;
53
54 void (*prepare_data_urb) (struct snd_usb_substream *subs,
55 struct urb *urb);
56 void (*retire_data_urb) (struct snd_usb_substream *subs,
57 struct urb *urb);
58
59 struct snd_usb_substream *data_subs;
60 struct snd_usb_endpoint *sync_master;
61 struct snd_usb_endpoint *sync_slave;
62
63 struct snd_urb_ctx urb[MAX_URBS];
64
65 struct snd_usb_packet_info {
66 uint32_t packet_size[MAX_PACKS_HS];
67 int packets;
68 } next_packet[MAX_URBS];
69 int next_packet_read_pos, next_packet_write_pos;
70 struct list_head ready_playback_urbs;
71
72 unsigned int nurbs; /* # urbs */
73 unsigned long active_mask; /* bitmask of active urbs */
74 unsigned long unlink_mask; /* bitmask of unlinked urbs */
75 char *syncbuf; /* sync buffer for all sync URBs */
76 dma_addr_t sync_dma; /* DMA address of syncbuf */
77
78 unsigned int pipe; /* the data i/o pipe */
79 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
80 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
81 int freqshift; /* how much to shift the feedback value to get Q16.16 */
82 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
83 unsigned int phase; /* phase accumulator */
84 unsigned int maxpacksize; /* max packet size in bytes */
85 unsigned int maxframesize; /* max packet size in frames */
86 unsigned int curpacksize; /* current packet size in bytes (for capture) */
87 unsigned int curframesize; /* current packet size in frames (for capture) */
88 unsigned int syncmaxsize; /* sync endpoint packet size */
89 unsigned int fill_max:1; /* fill max packet size always */
90 unsigned int datainterval; /* log_2 of data packet interval */
91 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
92 unsigned char silence_value;
93 unsigned int stride;
94 int iface, alt_idx;
95
96 spinlock_t lock;
97 struct list_head list;
98};
99
100struct snd_usb_substream {
101 struct snd_usb_stream *stream;
102 struct usb_device *dev;
103 struct snd_pcm_substream *pcm_substream;
104 int direction; /* playback or capture */
105 int interface; /* current interface */
106 int endpoint; /* assigned endpoint */
107 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
108 unsigned int cur_rate; /* current rate (for hw_params callback) */
109 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
110 unsigned int altset_idx; /* USB data format: index of alternate setting */
111 unsigned int txfr_quirk:1; /* allow sub-frame alignment */
112 unsigned int fmt_type; /* USB audio format type (1-3) */
113
114 unsigned int running: 1; /* running status */
115
116 unsigned int hwptr_done; /* processed byte position in the buffer */
117 unsigned int transfer_done; /* processed frames since last period update */
118 unsigned long active_mask; /* bitmask of active urbs */
119 unsigned long unlink_mask; /* bitmask of unlinked urbs */
120
121 /* data and sync endpoints for this stream */
122 unsigned int ep_num; /* the endpoint number */
123 struct snd_usb_endpoint *data_endpoint;
124 struct snd_usb_endpoint *sync_endpoint;
125 unsigned long flags;
126
127 u64 formats; /* format bitmasks (all or'ed) */
128 unsigned int num_formats; /* number of supported audio formats (list) */
129 struct list_head fmt_list; /* format list */
130 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
131 spinlock_t lock;
132
133 int last_frame_number; /* stored frame number */
134 int last_delay; /* stored delay */
135};
136
137struct snd_usb_stream {
138 struct snd_usb_audio *chip;
139 struct snd_pcm *pcm;
140 int pcm_index;
141 unsigned int fmt_type; /* USB audio format type (1-3) */
142 struct snd_usb_substream substream[2];
143 struct list_head list;
144};
145
146#endif /* __USBAUDIO_CARD_H */