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 */
30 struct snd_pcm_chmap_elem
*chmap
; /* (optional) channel map */
33 struct snd_usb_substream
;
34 struct snd_usb_endpoint
;
38 unsigned int buffer_size
; /* size of data buffer, if data URB */
39 struct snd_usb_substream
*subs
;
40 struct snd_usb_endpoint
*ep
;
41 int index
; /* index for urb array */
42 int packets
; /* number of packets per urb */
43 int packet_size
[MAX_PACKS_HS
]; /* size of packets for next submission */
44 struct list_head ready_list
;
47 struct snd_usb_endpoint
{
48 struct snd_usb_audio
*chip
;
51 int ep_num
; /* the referenced endpoint number */
52 int type
; /* SND_USB_ENDPOINT_TYPE_* */
55 void (*prepare_data_urb
) (struct snd_usb_substream
*subs
,
57 void (*retire_data_urb
) (struct snd_usb_substream
*subs
,
60 struct snd_usb_substream
*data_subs
;
61 struct snd_usb_endpoint
*sync_master
;
62 struct snd_usb_endpoint
*sync_slave
;
64 struct snd_urb_ctx urb
[MAX_URBS
];
66 struct snd_usb_packet_info
{
67 uint32_t packet_size
[MAX_PACKS_HS
];
69 } next_packet
[MAX_URBS
];
70 int next_packet_read_pos
, next_packet_write_pos
;
71 struct list_head ready_playback_urbs
;
73 unsigned int nurbs
; /* # urbs */
74 unsigned long active_mask
; /* bitmask of active urbs */
75 unsigned long unlink_mask
; /* bitmask of unlinked urbs */
76 char *syncbuf
; /* sync buffer for all sync URBs */
77 dma_addr_t sync_dma
; /* DMA address of syncbuf */
79 unsigned int pipe
; /* the data i/o pipe */
80 unsigned int freqn
; /* nominal sampling rate in fs/fps in Q16.16 format */
81 unsigned int freqm
; /* momentary sampling rate in fs/fps in Q16.16 format */
82 int freqshift
; /* how much to shift the feedback value to get Q16.16 */
83 unsigned int freqmax
; /* maximum sampling rate, used for buffer management */
84 unsigned int phase
; /* phase accumulator */
85 unsigned int maxpacksize
; /* max packet size in bytes */
86 unsigned int maxframesize
; /* max packet size in frames */
87 unsigned int curpacksize
; /* current packet size in bytes (for capture) */
88 unsigned int curframesize
; /* current packet size in frames (for capture) */
89 unsigned int syncmaxsize
; /* sync endpoint packet size */
90 unsigned int fill_max
:1; /* fill max packet size always */
91 unsigned int datainterval
; /* log_2 of data packet interval */
92 unsigned int syncinterval
; /* P for adaptive mode, 0 otherwise */
93 unsigned char silence_value
;
96 int skip_packets
; /* quirks for devices to ignore the first n packets
100 struct list_head list
;
103 struct snd_usb_substream
{
104 struct snd_usb_stream
*stream
;
105 struct usb_device
*dev
;
106 struct snd_pcm_substream
*pcm_substream
;
107 int direction
; /* playback or capture */
108 int interface
; /* current interface */
109 int endpoint
; /* assigned endpoint */
110 struct audioformat
*cur_audiofmt
; /* current audioformat pointer (for hw_params callback) */
111 snd_pcm_format_t pcm_format
; /* current audio format (for hw_params callback) */
112 unsigned int channels
; /* current number of channels (for hw_params callback) */
113 unsigned int channels_max
; /* max channels in the all audiofmts */
114 unsigned int cur_rate
; /* current rate (for hw_params callback) */
115 unsigned int period_bytes
; /* current period bytes (for hw_params callback) */
116 unsigned int altset_idx
; /* USB data format: index of alternate setting */
117 unsigned int txfr_quirk
:1; /* allow sub-frame alignment */
118 unsigned int fmt_type
; /* USB audio format type (1-3) */
120 unsigned int running
: 1; /* running status */
122 unsigned int hwptr_done
; /* processed byte position in the buffer */
123 unsigned int transfer_done
; /* processed frames since last period update */
125 /* data and sync endpoints for this stream */
126 unsigned int ep_num
; /* the endpoint number */
127 struct snd_usb_endpoint
*data_endpoint
;
128 struct snd_usb_endpoint
*sync_endpoint
;
130 bool need_setup_ep
; /* (re)configure EP at prepare? */
131 unsigned int speed
; /* USB_SPEED_XXX */
133 u64 formats
; /* format bitmasks (all or'ed) */
134 unsigned int num_formats
; /* number of supported audio formats (list) */
135 struct list_head fmt_list
; /* format list */
136 struct snd_pcm_hw_constraint_list rate_list
; /* limited rates */
139 int last_frame_number
; /* stored frame number */
140 int last_delay
; /* stored delay */
143 struct snd_usb_stream
{
144 struct snd_usb_audio
*chip
;
147 unsigned int fmt_type
; /* USB audio format type (1-3) */
148 struct snd_usb_substream substream
[2];
149 struct list_head list
;
152 #endif /* __USBAUDIO_CARD_H */