1
2#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED
3#define SOUND_FIREWIRE_AMDTP_H_INCLUDED
4
5#include <linux/err.h>
6#include <linux/interrupt.h>
7#include <linux/mutex.h>
8#include <linux/sched.h>
9#include <sound/asound.h>
10#include "packets-buffer.h"
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39enum cip_flags {
40 CIP_NONBLOCKING = 0x00,
41 CIP_BLOCKING = 0x01,
42 CIP_EMPTY_WITH_TAG0 = 0x02,
43 CIP_DBC_IS_END_EVENT = 0x04,
44 CIP_WRONG_DBS = 0x08,
45 CIP_SKIP_DBC_ZERO_CHECK = 0x10,
46 CIP_EMPTY_HAS_WRONG_DBC = 0x20,
47 CIP_JUMBO_PAYLOAD = 0x40,
48 CIP_HEADER_WITHOUT_EOH = 0x80,
49 CIP_NO_HEADER = 0x100,
50 CIP_UNALIGHED_DBC = 0x200,
51};
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76enum cip_sfc {
77 CIP_SFC_32000 = 0,
78 CIP_SFC_44100 = 1,
79 CIP_SFC_48000 = 2,
80 CIP_SFC_88200 = 3,
81 CIP_SFC_96000 = 4,
82 CIP_SFC_176400 = 5,
83 CIP_SFC_192000 = 6,
84 CIP_SFC_COUNT
85};
86
87struct fw_unit;
88struct fw_iso_context;
89struct snd_pcm_substream;
90struct snd_pcm_runtime;
91
92enum amdtp_stream_direction {
93 AMDTP_OUT_STREAM = 0,
94 AMDTP_IN_STREAM
95};
96
97struct pkt_desc {
98 u32 cycle;
99 u32 syt;
100 unsigned int data_blocks;
101 unsigned int data_block_counter;
102 __be32 *ctx_payload;
103};
104
105struct amdtp_stream;
106typedef unsigned int (*amdtp_stream_process_ctx_payloads_t)(
107 struct amdtp_stream *s,
108 const struct pkt_desc *desc,
109 unsigned int packets,
110 struct snd_pcm_substream *pcm);
111
112struct amdtp_domain;
113struct amdtp_stream {
114 struct fw_unit *unit;
115 enum cip_flags flags;
116 enum amdtp_stream_direction direction;
117 struct mutex mutex;
118
119
120 struct fw_iso_context *context;
121 struct iso_packets_buffer buffer;
122 unsigned int queue_size;
123 int packet_index;
124 struct pkt_desc *pkt_descs;
125 int tag;
126 union {
127 struct {
128 unsigned int ctx_header_size;
129
130
131 unsigned int max_ctx_payload_length;
132
133
134
135
136 unsigned int dbc_interval;
137 } tx;
138 struct {
139
140 unsigned int transfer_delay;
141 unsigned int seq_index;
142
143
144 unsigned int fdf;
145 int syt_override;
146
147
148 unsigned int event_count;
149 unsigned int events_per_period;
150 } rx;
151 } ctx_data;
152
153
154 unsigned int source_node_id_field;
155 unsigned int data_block_quadlets;
156 unsigned int data_block_counter;
157 unsigned int sph;
158 unsigned int fmt;
159
160
161 enum cip_sfc sfc;
162 unsigned int syt_interval;
163
164
165 struct snd_pcm_substream *pcm;
166 struct work_struct period_work;
167 snd_pcm_uframes_t pcm_buffer_pointer;
168 unsigned int pcm_period_pointer;
169
170
171 bool callbacked;
172 wait_queue_head_t callback_wait;
173 u32 start_cycle;
174
175
176 void *protocol;
177 amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
178
179
180 int channel;
181 int speed;
182 struct list_head list;
183 struct amdtp_domain *domain;
184};
185
186int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
187 enum amdtp_stream_direction dir, enum cip_flags flags,
188 unsigned int fmt,
189 amdtp_stream_process_ctx_payloads_t process_ctx_payloads,
190 unsigned int protocol_size);
191void amdtp_stream_destroy(struct amdtp_stream *s);
192
193int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate,
194 unsigned int data_block_quadlets);
195unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s);
196
197void amdtp_stream_update(struct amdtp_stream *s);
198
199int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s,
200 struct snd_pcm_runtime *runtime);
201
202void amdtp_stream_pcm_prepare(struct amdtp_stream *s);
203void amdtp_stream_pcm_abort(struct amdtp_stream *s);
204
205extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT];
206extern const unsigned int amdtp_rate_table[CIP_SFC_COUNT];
207
208
209
210
211
212
213
214static inline bool amdtp_stream_running(struct amdtp_stream *s)
215{
216 return !IS_ERR(s->context);
217}
218
219
220
221
222
223
224
225
226static inline bool amdtp_streaming_error(struct amdtp_stream *s)
227{
228 return s->packet_index < 0;
229}
230
231
232
233
234
235
236
237static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s)
238{
239 return !!s->pcm;
240}
241
242
243
244
245
246
247
248
249
250
251static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s,
252 struct snd_pcm_substream *pcm)
253{
254 WRITE_ONCE(s->pcm, pcm);
255}
256
257static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
258{
259 return sfc & 1;
260}
261
262
263
264
265
266
267
268
269static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s,
270 unsigned int timeout)
271{
272 return wait_event_timeout(s->callback_wait,
273 s->callbacked,
274 msecs_to_jiffies(timeout)) > 0;
275}
276
277struct seq_desc {
278 unsigned int syt_offset;
279 unsigned int data_blocks;
280};
281
282struct amdtp_domain {
283 struct list_head streams;
284
285 unsigned int events_per_period;
286 unsigned int events_per_buffer;
287
288 struct amdtp_stream *irq_target;
289
290 struct seq_desc *seq_descs;
291 unsigned int seq_size;
292 unsigned int seq_tail;
293
294 unsigned int data_block_state;
295 unsigned int syt_offset_state;
296 unsigned int last_syt_offset;
297};
298
299int amdtp_domain_init(struct amdtp_domain *d);
300void amdtp_domain_destroy(struct amdtp_domain *d);
301
302int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s,
303 int channel, int speed);
304
305int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle);
306void amdtp_domain_stop(struct amdtp_domain *d);
307
308static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d,
309 unsigned int events_per_period,
310 unsigned int events_per_buffer)
311{
312 d->events_per_period = events_per_period;
313 d->events_per_buffer = events_per_buffer;
314
315 return 0;
316}
317
318unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d,
319 struct amdtp_stream *s);
320int amdtp_domain_stream_pcm_ack(struct amdtp_domain *d, struct amdtp_stream *s);
321
322#endif
323