1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __USBAUDIO_CARD_H 3 #define __USBAUDIO_CARD_H 4 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 */ 8 #define MAX_URBS 12 9 #define SYNC_URBS 4 /* always four urbs for sync */ 10 #define MAX_QUEUE 18 /* try not to exceed this queue length, in ms */ 11 12 struct audioformat { 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 */ 43 }; 44 45 struct snd_usb_substream; 46 struct snd_usb_iface_ref; 47 struct snd_usb_endpoint; 48 struct snd_usb_power_domain; 49 50 struct snd_urb_ctx { 51 struct urb *urb; 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; 59 }; 60 61 struct snd_usb_endpoint { 62 struct snd_usb_audio *chip; 63 struct snd_usb_iface_ref *iface_ref; 64 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_* */ 69 70 unsigned char iface; /* interface number */ 71 unsigned char altsetting; /* corresponding alternate setting */ 72 unsigned char ep_idx; /* endpoint array index */ 73 74 unsigned long flags; /* running bit flags */ 75 76 void (*prepare_data_urb) (struct snd_usb_substream *subs, 77 struct urb *urb); 78 void (*retire_data_urb) (struct snd_usb_substream *subs, 79 struct urb *urb); 80 81 struct snd_usb_substream *data_subs; 82 struct snd_usb_endpoint *sync_source; 83 struct snd_usb_endpoint *sync_sink; 84 85 struct snd_urb_ctx urb[MAX_URBS]; 86 87 struct snd_usb_packet_info { 88 uint32_t packet_size[MAX_PACKS_HS]; 89 int packets; 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 */ 94 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 */ 100 101 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; 122 unsigned int stride; 123 int skip_packets; /* quirks for devices to ignore the first n packets 124 in a stream */ 125 bool implicit_fb_sync; /* syncs with implicit feedback */ 126 bool need_setup; /* (re-)need for configure? */ 127 128 /* 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; 137 138 spinlock_t lock; 139 struct list_head list; 140 }; 141 142 struct media_ctl; 143 144 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) */ 158 159 unsigned int running: 1; /* running status */ 160 161 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 */ 164 165 /* 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; 169 unsigned long flags; 170 unsigned int speed; /* USB_SPEED_XXX */ 171 172 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 */ 175 spinlock_t lock; 176 177 int last_frame_number; /* stored frame number */ 178 int last_delay; /* stored delay */ 179 180 struct { 181 int marker; 182 int channel; 183 int byte_idx; 184 } dsd_dop; 185 186 bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */ 187 struct media_ctl *media_ctl; 188 }; 189 190 struct snd_usb_stream { 191 struct snd_usb_audio *chip; 192 struct snd_pcm *pcm; 193 int pcm_index; 194 unsigned int fmt_type; /* USB audio format type (1-3) */ 195 struct snd_usb_substream substream[2]; 196 struct list_head list; 197 }; 198 199 #endif /* __USBAUDIO_CARD_H */ 200