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 ep_idx; /* endpoint array index */
22 unsigned char altset_idx; /* array index of altenate setting */
23 unsigned char attributes; /* corresponding attributes of cs endpoint */
24 unsigned char endpoint; /* endpoint */
25 unsigned char ep_attr; /* endpoint attributes */
26 bool implicit_fb; /* implicit feedback endpoint */
27 unsigned char sync_ep; /* sync endpoint number */
28 unsigned char sync_iface; /* sync EP interface */
29 unsigned char sync_altsetting; /* sync EP alternate setting */
30 unsigned char sync_ep_idx; /* sync EP array index */
31 unsigned char datainterval; /* log_2 of data packet interval */
32 unsigned char protocol; /* UAC_VERSION_1/2/3 */
33 unsigned int maxpacksize; /* max. packet size */
34 unsigned int rates; /* rate bitmasks */
35 unsigned int rate_min, rate_max; /* min/max rates */
36 unsigned int nr_rates; /* number of rate table entries */
37 unsigned int *rate_table; /* rate table */
38 unsigned char clock; /* associated clock */
39 struct snd_pcm_chmap_elem *chmap; /* (optional) channel map */
40 bool dsd_dop; /* add DOP headers in case of DSD samples */
41 bool dsd_bitrev; /* reverse the bits of each DSD sample */
42 bool dsd_raw; /* altsetting is raw DSD */
45 struct snd_usb_substream;
46 struct snd_usb_iface_ref;
47 struct snd_usb_endpoint;
48 struct snd_usb_power_domain;
52 unsigned int buffer_size; /* size of data buffer, if data URB */
53 struct snd_usb_substream *subs;
54 struct snd_usb_endpoint *ep;
55 int index; /* index for urb array */
56 int packets; /* number of packets per urb */
57 int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */
58 struct list_head ready_list;
61 struct snd_usb_endpoint {
62 struct snd_usb_audio *chip;
63 struct snd_usb_iface_ref *iface_ref;
65 int opened; /* open refcount; protect with chip->mutex */
66 atomic_t running; /* running status */
67 int ep_num; /* the referenced endpoint number */
68 int type; /* SND_USB_ENDPOINT_TYPE_* */
70 unsigned char iface; /* interface number */
71 unsigned char altsetting; /* corresponding alternate setting */
72 unsigned char ep_idx; /* endpoint array index */
74 atomic_t state; /* running state */
76 void (*prepare_data_urb) (struct snd_usb_substream *subs,
78 void (*retire_data_urb) (struct snd_usb_substream *subs,
81 struct snd_usb_substream *data_subs;
82 struct snd_usb_endpoint *sync_source;
83 struct snd_usb_endpoint *sync_sink;
85 struct snd_urb_ctx urb[MAX_URBS];
87 struct snd_usb_packet_info {
88 uint32_t packet_size[MAX_PACKS_HS];
90 } next_packet[MAX_URBS];
91 unsigned int next_packet_head; /* ring buffer offset to read */
92 unsigned int next_packet_queued; /* queued items in the ring buffer */
93 struct list_head ready_playback_urbs; /* playback URB FIFO for implicit fb */
95 unsigned int nurbs; /* # urbs */
96 unsigned long active_mask; /* bitmask of active urbs */
97 unsigned long unlink_mask; /* bitmask of unlinked urbs */
98 char *syncbuf; /* sync buffer for all sync URBs */
99 dma_addr_t sync_dma; /* DMA address of syncbuf */
101 unsigned int pipe; /* the data i/o pipe */
102 unsigned int packsize[2]; /* small/large packet sizes in samples */
103 unsigned int sample_rem; /* remainder from division fs/pps */
104 unsigned int sample_accum; /* sample accumulator */
105 unsigned int pps; /* packets per second */
106 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
107 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
108 int freqshift; /* how much to shift the feedback value to get Q16.16 */
109 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
110 unsigned int phase; /* phase accumulator */
111 unsigned int maxpacksize; /* max packet size in bytes */
112 unsigned int maxframesize; /* max packet size in frames */
113 unsigned int max_urb_frames; /* max URB size in frames */
114 unsigned int curpacksize; /* current packet size in bytes (for capture) */
115 unsigned int curframesize; /* current packet size in frames (for capture) */
116 unsigned int syncmaxsize; /* sync endpoint packet size */
117 unsigned int fill_max:1; /* fill max packet size always */
118 unsigned int tenor_fb_quirk:1; /* corrupted feedback data */
119 unsigned int datainterval; /* log_2 of data packet interval */
120 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
121 unsigned char silence_value;
123 int skip_packets; /* quirks for devices to ignore the first n packets
125 bool implicit_fb_sync; /* syncs with implicit feedback */
126 bool need_setup; /* (re-)need for configure? */
128 /* for hw constraints */
129 const struct audioformat *cur_audiofmt;
130 unsigned int cur_rate;
131 snd_pcm_format_t cur_format;
132 unsigned int cur_channels;
133 unsigned int cur_frame_bytes;
134 unsigned int cur_period_frames;
135 unsigned int cur_period_bytes;
136 unsigned int cur_buffer_periods;
139 struct list_head list;
144 struct snd_usb_substream {
145 struct snd_usb_stream *stream;
146 struct usb_device *dev;
147 struct snd_pcm_substream *pcm_substream;
148 int direction; /* playback or capture */
149 int endpoint; /* assigned endpoint */
150 const struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
151 struct snd_usb_power_domain *str_pd; /* UAC3 Power Domain for streaming path */
152 unsigned int channels_max; /* max channels in the all audiofmts */
153 unsigned int txfr_quirk:1; /* allow sub-frame alignment */
154 unsigned int tx_length_quirk:1; /* add length specifier to transfers */
155 unsigned int fmt_type; /* USB audio format type (1-3) */
156 unsigned int pkt_offset_adj; /* Bytes to drop from beginning of packets (for non-compliant devices) */
157 unsigned int stream_offset_adj; /* Bytes to drop from beginning of stream (for non-compliant devices) */
159 unsigned int running: 1; /* running status */
161 unsigned int hwptr_done; /* processed byte position in the buffer */
162 unsigned int transfer_done; /* processed frames since last period update */
163 unsigned int frame_limit; /* limits number of packets in URB */
165 /* data and sync endpoints for this stream */
166 unsigned int ep_num; /* the endpoint number */
167 struct snd_usb_endpoint *data_endpoint;
168 struct snd_usb_endpoint *sync_endpoint;
170 unsigned int speed; /* USB_SPEED_XXX */
172 u64 formats; /* format bitmasks (all or'ed) */
173 unsigned int num_formats; /* number of supported audio formats (list) */
174 struct list_head fmt_list; /* format list */
177 int last_frame_number; /* stored frame number */
178 int last_delay; /* stored delay */
186 bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */
187 struct media_ctl *media_ctl;
190 struct snd_usb_stream {
191 struct snd_usb_audio *chip;
194 unsigned int fmt_type; /* USB audio format type (1-3) */
195 struct snd_usb_substream substream[2];
196 struct list_head list;
199 #endif /* __USBAUDIO_CARD_H */