sound/usb/card.h

   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 alternate 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_clock_ref;
  48 struct snd_usb_endpoint;
  49 struct snd_usb_power_domain;
  50
  51 struct snd_urb_ctx {
  52         struct urb *urb;
  53         unsigned int buffer_size;       /* size of data buffer, if data URB */
  54         struct snd_usb_substream *subs;
  55         struct snd_usb_endpoint *ep;
  56         int index;      /* index for urb array */
  57         int packets;    /* number of packets per urb */
  58         int queued;     /* queued data bytes by this urb */
  59         int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */
  60         struct list_head ready_list;
  61 };
  62
  63 struct snd_usb_endpoint {
  64         struct snd_usb_audio *chip;
  65         struct snd_usb_iface_ref *iface_ref;
  66         struct snd_usb_clock_ref *clock_ref;
  67
  68         int opened;             /* open refcount; protect with chip->mutex */
  69         atomic_t running;       /* running status */
  70         int ep_num;             /* the referenced endpoint number */
  71         int type;               /* SND_USB_ENDPOINT_TYPE_* */
  72
  73         unsigned char iface;            /* interface number */
  74         unsigned char altsetting;       /* corresponding alternate setting */
  75         unsigned char ep_idx;           /* endpoint array index */
  76
  77         atomic_t state;         /* running state */
  78
  79         int (*prepare_data_urb) (struct snd_usb_substream *subs,
  80                                  struct urb *urb,
  81                                  bool in_stream_lock);
  82         void (*retire_data_urb) (struct snd_usb_substream *subs,
  83                                  struct urb *urb);
  84
  85         struct snd_usb_substream *data_subs;
  86         struct snd_usb_endpoint *sync_source;
  87         struct snd_usb_endpoint *sync_sink;
  88
  89         struct snd_urb_ctx urb[MAX_URBS];
  90
  91         struct snd_usb_packet_info {
  92                 uint32_t packet_size[MAX_PACKS_HS];
  93                 int packets;
  94         } next_packet[MAX_URBS];
  95         unsigned int next_packet_head;  /* ring buffer offset to read */
  96         unsigned int next_packet_queued; /* queued items in the ring buffer */
  97         struct list_head ready_playback_urbs; /* playback URB FIFO for implicit fb */
  98
  99         unsigned int nurbs;             /* # urbs */
 100         unsigned long active_mask;      /* bitmask of active urbs */
 101         unsigned long unlink_mask;      /* bitmask of unlinked urbs */
 102         atomic_t submitted_urbs;        /* currently submitted urbs */
 103         char *syncbuf;                  /* sync buffer for all sync URBs */
 104         dma_addr_t sync_dma;            /* DMA address of syncbuf */
 105
 106         unsigned int pipe;              /* the data i/o pipe */
 107         unsigned int packsize[2];       /* small/large packet sizes in samples */
 108         unsigned int sample_rem;        /* remainder from division fs/pps */
 109         unsigned int sample_accum;      /* sample accumulator */
 110         unsigned int pps;               /* packets per second */
 111         unsigned int freqn;             /* nominal sampling rate in fs/fps in Q16.16 format */
 112         unsigned int freqm;             /* momentary sampling rate in fs/fps in Q16.16 format */
 113         int        freqshift;           /* how much to shift the feedback value to get Q16.16 */
 114         unsigned int freqmax;           /* maximum sampling rate, used for buffer management */
 115         unsigned int phase;             /* phase accumulator */
 116         unsigned int maxpacksize;       /* max packet size in bytes */
 117         unsigned int maxframesize;      /* max packet size in frames */
 118         unsigned int max_urb_frames;    /* max URB size in frames */
 119         unsigned int curpacksize;       /* current packet size in bytes (for capture) */
 120         unsigned int curframesize;      /* current packet size in frames (for capture) */
 121         unsigned int syncmaxsize;       /* sync endpoint packet size */
 122         unsigned int fill_max:1;        /* fill max packet size always */
 123         unsigned int tenor_fb_quirk:1;  /* corrupted feedback data */
 124         unsigned int datainterval;      /* log_2 of data packet interval */
 125         unsigned int syncinterval;      /* P for adaptive mode, 0 otherwise */
 126         unsigned char silence_value;
 127         unsigned int stride;
 128         int skip_packets;               /* quirks for devices to ignore the first n packets
 129                                            in a stream */
 130         bool implicit_fb_sync;          /* syncs with implicit feedback */
 131         bool lowlatency_playback;       /* low-latency playback mode */
 132         bool need_setup;                /* (re-)need for hw_params? */
 133         bool need_prepare;              /* (re-)need for prepare? */
 134         bool fixed_rate;                /* skip rate setup */
 135
 136         /* for hw constraints */
 137         const struct audioformat *cur_audiofmt;
 138         unsigned int cur_rate;
 139         snd_pcm_format_t cur_format;
 140         unsigned int cur_channels;
 141         unsigned int cur_frame_bytes;
 142         unsigned int cur_period_frames;
 143         unsigned int cur_period_bytes;
 144         unsigned int cur_buffer_periods;
 145
 146         spinlock_t lock;
 147         struct list_head list;
 148 };
 149
 150 struct media_ctl;
 151
 152 struct snd_usb_substream {
 153         struct snd_usb_stream *stream;
 154         struct usb_device *dev;
 155         struct snd_pcm_substream *pcm_substream;
 156         int direction;  /* playback or capture */
 157         int endpoint;   /* assigned endpoint */
 158         const struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
 159         struct snd_usb_power_domain *str_pd;    /* UAC3 Power Domain for streaming path */
 160         unsigned int channels_max;      /* max channels in the all audiofmts */
 161         unsigned int txfr_quirk:1;      /* allow sub-frame alignment */
 162         unsigned int tx_length_quirk:1; /* add length specifier to transfers */
 163         unsigned int fmt_type;          /* USB audio format type (1-3) */
 164         unsigned int pkt_offset_adj;    /* Bytes to drop from beginning of packets (for non-compliant devices) */
 165         unsigned int stream_offset_adj; /* Bytes to drop from beginning of stream (for non-compliant devices) */
 166
 167         unsigned int running: 1;        /* running status */
 168         unsigned int period_elapsed_pending;    /* delay period handling */
 169
 170         unsigned int buffer_bytes;      /* buffer size in bytes */
 171         unsigned int inflight_bytes;    /* in-flight data bytes on buffer (for playback) */
 172         unsigned int hwptr_done;        /* processed byte position in the buffer */
 173         unsigned int transfer_done;     /* processed frames since last period update */
 174         unsigned int frame_limit;       /* limits number of packets in URB */
 175
 176         /* data and sync endpoints for this stream */
 177         unsigned int ep_num;            /* the endpoint number */
 178         struct snd_usb_endpoint *data_endpoint;
 179         struct snd_usb_endpoint *sync_endpoint;
 180         unsigned long flags;
 181         unsigned int speed;             /* USB_SPEED_XXX */
 182
 183         u64 formats;                    /* format bitmasks (all or'ed) */
 184         unsigned int num_formats;               /* number of supported audio formats (list) */
 185         struct list_head fmt_list;      /* format list */
 186         spinlock_t lock;
 187
 188         unsigned int last_frame_number; /* stored frame number */
 189
 190         struct {
 191                 int marker;
 192                 int channel;
 193                 int byte_idx;
 194         } dsd_dop;
 195
 196         bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */
 197         bool lowlatency_playback;       /* low-latency playback mode */
 198         struct media_ctl *media_ctl;
 199 };
 200
 201 struct snd_usb_stream {
 202         struct snd_usb_audio *chip;
 203         struct snd_pcm *pcm;
 204         int pcm_index;
 205         unsigned int fmt_type;          /* USB audio format type (1-3) */
 206         struct snd_usb_substream substream[2];
 207         struct list_head list;
 208 };
 209
 210 #endif /* __USBAUDIO_CARD_H */