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