1 #ifndef __USBAUDIO_CARD_H
2 #define __USBAUDIO_CARD_H
4 #define MAX_NR_RATES 1024
6 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
8 #define SYNC_URBS 4 /* always four urbs for sync */
9 #define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
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 */
32 struct snd_usb_substream;
33 struct snd_usb_endpoint;
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;
46 struct snd_usb_endpoint {
47 struct snd_usb_audio *chip;
50 int ep_num; /* the referenced endpoint number */
51 int type; /* SND_USB_ENDPOINT_TYPE_* */
54 void (*prepare_data_urb) (struct snd_usb_substream *subs,
56 void (*retire_data_urb) (struct snd_usb_substream *subs,
59 struct snd_usb_substream *data_subs;
60 struct snd_usb_endpoint *sync_master;
61 struct snd_usb_endpoint *sync_slave;
63 struct snd_urb_ctx urb[MAX_URBS];
65 struct snd_usb_packet_info {
66 uint32_t packet_size[MAX_PACKS_HS];
68 } next_packet[MAX_URBS];
69 int next_packet_read_pos, next_packet_write_pos;
70 struct list_head ready_playback_urbs;
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 */
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;
97 struct list_head list;
100 struct 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) */
114 unsigned int running: 1; /* running status */
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 */
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;
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 */
133 int last_frame_number; /* stored frame number */
134 int last_delay; /* stored delay */
137 struct snd_usb_stream {
138 struct snd_usb_audio *chip;
141 unsigned int fmt_type; /* USB audio format type (1-3) */
142 struct snd_usb_substream substream[2];
143 struct list_head list;
146 #endif /* __USBAUDIO_CARD_H */