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 int maxpacksize; /* max. packet size */ 25 unsigned int rates; /* rate bitmasks */ 26 unsigned int rate_min, rate_max; /* min/max rates */ 27 unsigned int nr_rates; /* number of rate table entries */ 28 unsigned int *rate_table; /* rate table */ 29 unsigned char clock; /* associated clock */ 30 struct snd_pcm_chmap_elem *chmap; /* (optional) channel map */ 31 }; 32 33 struct snd_usb_substream; 34 struct snd_usb_endpoint; 35 36 struct snd_urb_ctx { 37 struct urb *urb; 38 unsigned int buffer_size; /* size of data buffer, if data URB */ 39 struct snd_usb_substream *subs; 40 struct snd_usb_endpoint *ep; 41 int index; /* index for urb array */ 42 int packets; /* number of packets per urb */ 43 int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */ 44 struct list_head ready_list; 45 }; 46 47 struct snd_usb_endpoint { 48 struct snd_usb_audio *chip; 49 50 int use_count; 51 int ep_num; /* the referenced endpoint number */ 52 int type; /* SND_USB_ENDPOINT_TYPE_* */ 53 unsigned long flags; 54 55 void (*prepare_data_urb) (struct snd_usb_substream *subs, 56 struct urb *urb); 57 void (*retire_data_urb) (struct snd_usb_substream *subs, 58 struct urb *urb); 59 60 struct snd_usb_substream *data_subs; 61 struct snd_usb_endpoint *sync_master; 62 struct snd_usb_endpoint *sync_slave; 63 64 struct snd_urb_ctx urb[MAX_URBS]; 65 66 struct snd_usb_packet_info { 67 uint32_t packet_size[MAX_PACKS_HS]; 68 int packets; 69 } next_packet[MAX_URBS]; 70 int next_packet_read_pos, next_packet_write_pos; 71 struct list_head ready_playback_urbs; 72 73 unsigned int nurbs; /* # urbs */ 74 unsigned long active_mask; /* bitmask of active urbs */ 75 unsigned long unlink_mask; /* bitmask of unlinked urbs */ 76 char *syncbuf; /* sync buffer for all sync URBs */ 77 dma_addr_t sync_dma; /* DMA address of syncbuf */ 78 79 unsigned int pipe; /* the data i/o pipe */ 80 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */ 81 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */ 82 int freqshift; /* how much to shift the feedback value to get Q16.16 */ 83 unsigned int freqmax; /* maximum sampling rate, used for buffer management */ 84 unsigned int phase; /* phase accumulator */ 85 unsigned int maxpacksize; /* max packet size in bytes */ 86 unsigned int maxframesize; /* max packet size in frames */ 87 unsigned int curpacksize; /* current packet size in bytes (for capture) */ 88 unsigned int curframesize; /* current packet size in frames (for capture) */ 89 unsigned int syncmaxsize; /* sync endpoint packet size */ 90 unsigned int fill_max:1; /* fill max packet size always */ 91 unsigned int datainterval; /* log_2 of data packet interval */ 92 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */ 93 unsigned char silence_value; 94 unsigned int stride; 95 int iface, alt_idx; 96 int skip_packets; /* quirks for devices to ignore the first n packets 97 in a stream */ 98 99 spinlock_t lock; 100 struct list_head list; 101 }; 102 103 struct snd_usb_substream { 104 struct snd_usb_stream *stream; 105 struct usb_device *dev; 106 struct snd_pcm_substream *pcm_substream; 107 int direction; /* playback or capture */ 108 int interface; /* current interface */ 109 int endpoint; /* assigned endpoint */ 110 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ 111 snd_pcm_format_t pcm_format; /* current audio format (for hw_params callback) */ 112 unsigned int channels; /* current number of channels (for hw_params callback) */ 113 unsigned int channels_max; /* max channels in the all audiofmts */ 114 unsigned int cur_rate; /* current rate (for hw_params callback) */ 115 unsigned int period_bytes; /* current period bytes (for hw_params callback) */ 116 unsigned int altset_idx; /* USB data format: index of alternate setting */ 117 unsigned int txfr_quirk:1; /* allow sub-frame alignment */ 118 unsigned int fmt_type; /* USB audio format type (1-3) */ 119 120 unsigned int running: 1; /* running status */ 121 122 unsigned int hwptr_done; /* processed byte position in the buffer */ 123 unsigned int transfer_done; /* processed frames since last period update */ 124 125 /* data and sync endpoints for this stream */ 126 unsigned int ep_num; /* the endpoint number */ 127 struct snd_usb_endpoint *data_endpoint; 128 struct snd_usb_endpoint *sync_endpoint; 129 unsigned long flags; 130 bool need_setup_ep; /* (re)configure EP at prepare? */ 131 unsigned int speed; /* USB_SPEED_XXX */ 132 133 u64 formats; /* format bitmasks (all or'ed) */ 134 unsigned int num_formats; /* number of supported audio formats (list) */ 135 struct list_head fmt_list; /* format list */ 136 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */ 137 spinlock_t lock; 138 139 int last_frame_number; /* stored frame number */ 140 int last_delay; /* stored delay */ 141 }; 142 143 struct snd_usb_stream { 144 struct snd_usb_audio *chip; 145 struct snd_pcm *pcm; 146 int pcm_index; 147 unsigned int fmt_type; /* USB audio format type (1-3) */ 148 struct snd_usb_substream substream[2]; 149 struct list_head list; 150 }; 151 152 #endif /* __USBAUDIO_CARD_H */ 153