1 #ifndef __USBAUDIO_CARD_H 2 #define __USBAUDIO_CARD_H 3 4 #define MAX_NR_RATES 1024 5 #define MAX_PACKS 20 6 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */ 7 #define MAX_URBS 8 8 #define SYNC_URBS 4 /* always four urbs for sync */ 9 #define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */ 10 11 struct audioformat { 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 char protocol; /* UAC_VERSION_1/2 */ 25 unsigned int maxpacksize; /* max. packet size */ 26 unsigned int rates; /* rate bitmasks */ 27 unsigned int rate_min, rate_max; /* min/max rates */ 28 unsigned int nr_rates; /* number of rate table entries */ 29 unsigned int *rate_table; /* rate table */ 30 unsigned char clock; /* associated clock */ 31 struct snd_pcm_chmap_elem *chmap; /* (optional) channel map */ 32 bool dsd_dop; /* add DOP headers in case of DSD samples */ 33 bool dsd_bitrev; /* reverse the bits of each DSD sample */ 34 }; 35 36 struct snd_usb_substream; 37 struct snd_usb_endpoint; 38 39 struct snd_urb_ctx { 40 struct urb *urb; 41 unsigned int buffer_size; /* size of data buffer, if data URB */ 42 struct snd_usb_substream *subs; 43 struct snd_usb_endpoint *ep; 44 int index; /* index for urb array */ 45 int packets; /* number of packets per urb */ 46 int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */ 47 struct list_head ready_list; 48 }; 49 50 struct snd_usb_endpoint { 51 struct snd_usb_audio *chip; 52 53 int use_count; 54 int ep_num; /* the referenced endpoint number */ 55 int type; /* SND_USB_ENDPOINT_TYPE_* */ 56 unsigned long flags; 57 58 void (*prepare_data_urb) (struct snd_usb_substream *subs, 59 struct urb *urb); 60 void (*retire_data_urb) (struct snd_usb_substream *subs, 61 struct urb *urb); 62 63 struct snd_usb_substream *data_subs; 64 struct snd_usb_endpoint *sync_master; 65 struct snd_usb_endpoint *sync_slave; 66 67 struct snd_urb_ctx urb[MAX_URBS]; 68 69 struct snd_usb_packet_info { 70 uint32_t packet_size[MAX_PACKS_HS]; 71 int packets; 72 } next_packet[MAX_URBS]; 73 int next_packet_read_pos, next_packet_write_pos; 74 struct list_head ready_playback_urbs; 75 76 unsigned int nurbs; /* # urbs */ 77 unsigned long active_mask; /* bitmask of active urbs */ 78 unsigned long unlink_mask; /* bitmask of unlinked urbs */ 79 char *syncbuf; /* sync buffer for all sync URBs */ 80 dma_addr_t sync_dma; /* DMA address of syncbuf */ 81 82 unsigned int pipe; /* the data i/o pipe */ 83 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */ 84 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */ 85 int freqshift; /* how much to shift the feedback value to get Q16.16 */ 86 unsigned int freqmax; /* maximum sampling rate, used for buffer management */ 87 unsigned int phase; /* phase accumulator */ 88 unsigned int maxpacksize; /* max packet size in bytes */ 89 unsigned int maxframesize; /* max packet size in frames */ 90 unsigned int curpacksize; /* current packet size in bytes (for capture) */ 91 unsigned int curframesize; /* current packet size in frames (for capture) */ 92 unsigned int syncmaxsize; /* sync endpoint packet size */ 93 unsigned int fill_max:1; /* fill max packet size always */ 94 unsigned int datainterval; /* log_2 of data packet interval */ 95 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */ 96 unsigned char silence_value; 97 unsigned int stride; 98 int iface, alt_idx; 99 int skip_packets; /* quirks for devices to ignore the first n packets 100 in a stream */ 101 102 spinlock_t lock; 103 struct list_head list; 104 }; 105 106 struct snd_usb_substream { 107 struct snd_usb_stream *stream; 108 struct usb_device *dev; 109 struct snd_pcm_substream *pcm_substream; 110 int direction; /* playback or capture */ 111 int interface; /* current interface */ 112 int endpoint; /* assigned endpoint */ 113 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ 114 snd_pcm_format_t pcm_format; /* current audio format (for hw_params callback) */ 115 unsigned int channels; /* current number of channels (for hw_params callback) */ 116 unsigned int channels_max; /* max channels in the all audiofmts */ 117 unsigned int cur_rate; /* current rate (for hw_params callback) */ 118 unsigned int period_bytes; /* current period bytes (for hw_params callback) */ 119 unsigned int altset_idx; /* USB data format: index of alternate setting */ 120 unsigned int txfr_quirk:1; /* allow sub-frame alignment */ 121 unsigned int fmt_type; /* USB audio format type (1-3) */ 122 unsigned int pkt_offset_adj; /* Bytes to drop from beginning of packets (for non-compliant devices) */ 123 124 unsigned int running: 1; /* running status */ 125 126 unsigned int hwptr_done; /* processed byte position in the buffer */ 127 unsigned int transfer_done; /* processed frames since last period update */ 128 129 /* data and sync endpoints for this stream */ 130 unsigned int ep_num; /* the endpoint number */ 131 struct snd_usb_endpoint *data_endpoint; 132 struct snd_usb_endpoint *sync_endpoint; 133 unsigned long flags; 134 bool need_setup_ep; /* (re)configure EP at prepare? */ 135 unsigned int speed; /* USB_SPEED_XXX */ 136 137 u64 formats; /* format bitmasks (all or'ed) */ 138 unsigned int num_formats; /* number of supported audio formats (list) */ 139 struct list_head fmt_list; /* format list */ 140 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */ 141 spinlock_t lock; 142 143 int last_frame_number; /* stored frame number */ 144 int last_delay; /* stored delay */ 145 146 struct { 147 int marker; 148 int channel; 149 int byte_idx; 150 } dsd_dop; 151 }; 152 153 struct snd_usb_stream { 154 struct snd_usb_audio *chip; 155 struct snd_pcm *pcm; 156 int pcm_index; 157 unsigned int fmt_type; /* USB audio format type (1-3) */ 158 struct snd_usb_substream substream[2]; 159 struct list_head list; 160 }; 161 162 #endif /* __USBAUDIO_CARD_H */ 163