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1 #ifndef __USBAUDIO_CARD_H
2 #define __USBAUDIO_CARD_H
3 
4 #define MAX_NR_RATES	1024
5 #define MAX_PACKS	6		/* per URB */
6 #define MAX_PACKS_HS	(MAX_PACKS * 8)	/* in high speed mode */
7 #define MAX_URBS	12
8 #define SYNC_URBS	4	/* always four urbs for sync */
9 #define MAX_QUEUE	18	/* 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 max_urb_frames;	/* max URB size in frames */
91 	unsigned int curpacksize;	/* current packet size in bytes (for capture) */
92 	unsigned int curframesize;      /* current packet size in frames (for capture) */
93 	unsigned int syncmaxsize;	/* sync endpoint packet size */
94 	unsigned int fill_max:1;	/* fill max packet size always */
95 	unsigned int tenor_fb_quirk:1;	/* corrupted feedback data */
96 	unsigned int datainterval;      /* log_2 of data packet interval */
97 	unsigned int syncinterval;	/* P for adaptive mode, 0 otherwise */
98 	unsigned char silence_value;
99 	unsigned int stride;
100 	int iface, altsetting;
101 	int skip_packets;		/* quirks for devices to ignore the first n packets
102 					   in a stream */
103 
104 	spinlock_t lock;
105 	struct list_head list;
106 };
107 
108 struct snd_usb_substream {
109 	struct snd_usb_stream *stream;
110 	struct usb_device *dev;
111 	struct snd_pcm_substream *pcm_substream;
112 	int direction;	/* playback or capture */
113 	int interface;	/* current interface */
114 	int endpoint;	/* assigned endpoint */
115 	struct audioformat *cur_audiofmt;	/* current audioformat pointer (for hw_params callback) */
116 	snd_pcm_format_t pcm_format;	/* current audio format (for hw_params callback) */
117 	unsigned int channels;		/* current number of channels (for hw_params callback) */
118 	unsigned int channels_max;	/* max channels in the all audiofmts */
119 	unsigned int cur_rate;		/* current rate (for hw_params callback) */
120 	unsigned int period_bytes;	/* current period bytes (for hw_params callback) */
121 	unsigned int period_frames;	/* current frames per period */
122 	unsigned int buffer_periods;	/* current periods per buffer */
123 	unsigned int altset_idx;     /* USB data format: index of alternate setting */
124 	unsigned int txfr_quirk:1;	/* allow sub-frame alignment */
125 	unsigned int tx_length_quirk:1;	/* add length specifier to transfers */
126 	unsigned int fmt_type;		/* USB audio format type (1-3) */
127 	unsigned int pkt_offset_adj;	/* Bytes to drop from beginning of packets (for non-compliant devices) */
128 
129 	unsigned int running: 1;	/* running status */
130 
131 	unsigned int hwptr_done;	/* processed byte position in the buffer */
132 	unsigned int transfer_done;		/* processed frames since last period update */
133 	unsigned int frame_limit;	/* limits number of packets in URB */
134 
135 	/* data and sync endpoints for this stream */
136 	unsigned int ep_num;		/* the endpoint number */
137 	struct snd_usb_endpoint *data_endpoint;
138 	struct snd_usb_endpoint *sync_endpoint;
139 	unsigned long flags;
140 	bool need_setup_ep;		/* (re)configure EP at prepare? */
141 	unsigned int speed;		/* USB_SPEED_XXX */
142 
143 	u64 formats;			/* format bitmasks (all or'ed) */
144 	unsigned int num_formats;		/* number of supported audio formats (list) */
145 	struct list_head fmt_list;	/* format list */
146 	struct snd_pcm_hw_constraint_list rate_list;	/* limited rates */
147 	spinlock_t lock;
148 
149 	int last_frame_number;          /* stored frame number */
150 	int last_delay;                 /* stored delay */
151 
152 	struct {
153 		int marker;
154 		int channel;
155 		int byte_idx;
156 	} dsd_dop;
157 
158 	bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */
159 };
160 
161 struct snd_usb_stream {
162 	struct snd_usb_audio *chip;
163 	struct snd_pcm *pcm;
164 	int pcm_index;
165 	unsigned int fmt_type;		/* USB audio format type (1-3) */
166 	struct snd_usb_substream substream[2];
167 	struct list_head list;
168 };
169 
170 #endif /* __USBAUDIO_CARD_H */
171