1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __USBAUDIO_CARD_H
3 #define __USBAUDIO_CARD_H
5 #define MAX_NR_RATES 1024
6 #define MAX_PACKS 6 /* per URB */
7 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
9 #define SYNC_URBS 4 /* always four urbs for sync */
10 #define MAX_QUEUE 18 /* try not to exceed this queue length, in ms */
13 struct list_head list;
14 u64 formats; /* ALSA format bits */
15 unsigned int channels; /* # channels */
16 unsigned int fmt_type; /* USB audio format type (1-3) */
17 unsigned int fmt_bits; /* number of significant bits */
18 unsigned int frame_size; /* samples per frame for non-audio */
19 unsigned char iface; /* interface number */
20 unsigned char altsetting; /* corresponding alternate setting */
21 unsigned char altset_idx; /* array index of altenate setting */
22 unsigned char attributes; /* corresponding attributes of cs endpoint */
23 unsigned char endpoint; /* endpoint */
24 unsigned char ep_attr; /* endpoint attributes */
25 bool implicit_fb; /* implicit feedback endpoint */
26 unsigned char sync_ep; /* sync endpoint number */
27 unsigned char sync_iface; /* sync EP interface */
28 unsigned char sync_altsetting; /* sync EP alternate setting */
29 unsigned char sync_ep_idx; /* sync EP array index */
30 unsigned char datainterval; /* log_2 of data packet interval */
31 unsigned char protocol; /* UAC_VERSION_1/2/3 */
32 unsigned int maxpacksize; /* max. packet size */
33 unsigned int rates; /* rate bitmasks */
34 unsigned int rate_min, rate_max; /* min/max rates */
35 unsigned int nr_rates; /* number of rate table entries */
36 unsigned int *rate_table; /* rate table */
37 unsigned char clock; /* associated clock */
38 struct snd_pcm_chmap_elem *chmap; /* (optional) channel map */
39 bool dsd_dop; /* add DOP headers in case of DSD samples */
40 bool dsd_bitrev; /* reverse the bits of each DSD sample */
41 bool dsd_raw; /* altsetting is raw DSD */
44 struct snd_usb_substream;
45 struct snd_usb_endpoint;
46 struct snd_usb_power_domain;
50 unsigned int buffer_size; /* size of data buffer, if data URB */
51 struct snd_usb_substream *subs;
52 struct snd_usb_endpoint *ep;
53 int index; /* index for urb array */
54 int packets; /* number of packets per urb */
55 int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */
56 struct list_head ready_list;
59 struct snd_usb_endpoint {
60 struct snd_usb_audio *chip;
62 int opened; /* open refcount; protect with chip->mutex */
63 atomic_t running; /* running status */
64 int ep_num; /* the referenced endpoint number */
65 int type; /* SND_USB_ENDPOINT_TYPE_* */
67 unsigned char iface; /* interface number */
68 unsigned char altsetting; /* corresponding alternate setting */
69 unsigned char ep_idx; /* endpoint array index */
71 unsigned long flags; /* running bit flags */
73 void (*prepare_data_urb) (struct snd_usb_substream *subs,
75 void (*retire_data_urb) (struct snd_usb_substream *subs,
78 struct snd_usb_substream *data_subs;
79 struct snd_usb_endpoint *sync_source;
80 struct snd_usb_endpoint *sync_sink;
82 struct snd_urb_ctx urb[MAX_URBS];
84 struct snd_usb_packet_info {
85 uint32_t packet_size[MAX_PACKS_HS];
87 } next_packet[MAX_URBS];
88 unsigned int next_packet_head; /* ring buffer offset to read */
89 unsigned int next_packet_queued; /* queued items in the ring buffer */
90 struct list_head ready_playback_urbs; /* playback URB FIFO for implicit fb */
92 unsigned int nurbs; /* # urbs */
93 unsigned long active_mask; /* bitmask of active urbs */
94 unsigned long unlink_mask; /* bitmask of unlinked urbs */
95 char *syncbuf; /* sync buffer for all sync URBs */
96 dma_addr_t sync_dma; /* DMA address of syncbuf */
98 unsigned int pipe; /* the data i/o pipe */
99 unsigned int packsize[2]; /* small/large packet sizes in samples */
100 unsigned int sample_rem; /* remainder from division fs/pps */
101 unsigned int sample_accum; /* sample accumulator */
102 unsigned int pps; /* packets per second */
103 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
104 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
105 int freqshift; /* how much to shift the feedback value to get Q16.16 */
106 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
107 unsigned int phase; /* phase accumulator */
108 unsigned int maxpacksize; /* max packet size in bytes */
109 unsigned int maxframesize; /* max packet size in frames */
110 unsigned int max_urb_frames; /* max URB size in frames */
111 unsigned int curpacksize; /* current packet size in bytes (for capture) */
112 unsigned int curframesize; /* current packet size in frames (for capture) */
113 unsigned int syncmaxsize; /* sync endpoint packet size */
114 unsigned int fill_max:1; /* fill max packet size always */
115 unsigned int tenor_fb_quirk:1; /* corrupted feedback data */
116 unsigned int datainterval; /* log_2 of data packet interval */
117 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
118 unsigned char silence_value;
120 int skip_packets; /* quirks for devices to ignore the first n packets
122 bool implicit_fb_sync; /* syncs with implicit feedback */
123 bool need_setup; /* (re-)need for configure? */
125 /* for hw constraints */
126 const struct audioformat *cur_audiofmt;
127 unsigned int cur_rate;
128 snd_pcm_format_t cur_format;
129 unsigned int cur_channels;
130 unsigned int cur_frame_bytes;
131 unsigned int cur_period_frames;
132 unsigned int cur_period_bytes;
133 unsigned int cur_buffer_periods;
136 struct list_head list;
141 struct snd_usb_substream {
142 struct snd_usb_stream *stream;
143 struct usb_device *dev;
144 struct snd_pcm_substream *pcm_substream;
145 int direction; /* playback or capture */
146 int endpoint; /* assigned endpoint */
147 const struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
148 struct snd_usb_power_domain *str_pd; /* UAC3 Power Domain for streaming path */
149 unsigned int channels_max; /* max channels in the all audiofmts */
150 unsigned int txfr_quirk:1; /* allow sub-frame alignment */
151 unsigned int tx_length_quirk:1; /* add length specifier to transfers */
152 unsigned int fmt_type; /* USB audio format type (1-3) */
153 unsigned int pkt_offset_adj; /* Bytes to drop from beginning of packets (for non-compliant devices) */
154 unsigned int stream_offset_adj; /* Bytes to drop from beginning of stream (for non-compliant devices) */
156 unsigned int running: 1; /* running status */
158 unsigned int hwptr_done; /* processed byte position in the buffer */
159 unsigned int transfer_done; /* processed frames since last period update */
160 unsigned int frame_limit; /* limits number of packets in URB */
162 /* data and sync endpoints for this stream */
163 unsigned int ep_num; /* the endpoint number */
164 struct snd_usb_endpoint *data_endpoint;
165 struct snd_usb_endpoint *sync_endpoint;
167 unsigned int speed; /* USB_SPEED_XXX */
169 u64 formats; /* format bitmasks (all or'ed) */
170 unsigned int num_formats; /* number of supported audio formats (list) */
171 struct list_head fmt_list; /* format list */
174 int last_frame_number; /* stored frame number */
175 int last_delay; /* stored delay */
183 bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */
184 struct media_ctl *media_ctl;
187 struct snd_usb_stream {
188 struct snd_usb_audio *chip;
191 unsigned int fmt_type; /* USB audio format type (1-3) */
192 struct snd_usb_substream substream[2];
193 struct list_head list;
196 #endif /* __USBAUDIO_CARD_H */