1
2
3
4
5
6
7
8
9
10
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
39
40
41
42
43
44
45
46
47
48
49
50
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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* ff-stream.c - a part of driver for RME Fireface series
*
* Copyright (c) 2015-2017 Takashi Sakamoto
*/
#include "ff.h"
#define CALLBACK_TIMEOUT_MS 200
int snd_ff_stream_get_multiplier_mode(enum cip_sfc sfc,
enum snd_ff_stream_mode *mode)
{
static const enum snd_ff_stream_mode modes[] = {
[CIP_SFC_32000] = SND_FF_STREAM_MODE_LOW,
[CIP_SFC_44100] = SND_FF_STREAM_MODE_LOW,
[CIP_SFC_48000] = SND_FF_STREAM_MODE_LOW,
[CIP_SFC_88200] = SND_FF_STREAM_MODE_MID,
[CIP_SFC_96000] = SND_FF_STREAM_MODE_MID,
[CIP_SFC_176400] = SND_FF_STREAM_MODE_HIGH,
[CIP_SFC_192000] = SND_FF_STREAM_MODE_HIGH,
};
if (sfc >= CIP_SFC_COUNT)
return -EINVAL;
*mode = modes[sfc];
return 0;
}
static inline void finish_session(struct snd_ff *ff)
{
ff->spec->protocol->finish_session(ff);
ff->spec->protocol->switch_fetching_mode(ff, false);
}
static int init_stream(struct snd_ff *ff, struct amdtp_stream *s)
{
struct fw_iso_resources *resources;
enum amdtp_stream_direction dir;
int err;
if (s == &ff->tx_stream) {
resources = &ff->tx_resources;
dir = AMDTP_IN_STREAM;
} else {
resources = &ff->rx_resources;
dir = AMDTP_OUT_STREAM;
}
err = fw_iso_resources_init(resources, ff->unit);
if (err < 0)
return err;
err = amdtp_ff_init(s, ff->unit, dir);
if (err < 0)
fw_iso_resources_destroy(resources);
return err;
}
static void destroy_stream(struct snd_ff *ff, struct amdtp_stream *s)
{
amdtp_stream_destroy(s);
if (s == &ff->tx_stream)
fw_iso_resources_destroy(&ff->tx_resources);
else
fw_iso_resources_destroy(&ff->rx_resources);
}
int snd_ff_stream_init_duplex(struct snd_ff *ff)
{
int err;
err = init_stream(ff, &ff->rx_stream);
if (err < 0)
return err;
err = init_stream(ff, &ff->tx_stream);
if (err < 0) {
destroy_stream(ff, &ff->rx_stream);
return err;
}
err = amdtp_domain_init(&ff->domain);
if (err < 0) {
destroy_stream(ff, &ff->rx_stream);
destroy_stream(ff, &ff->tx_stream);
}
return err;
}
/*
* This function should be called before starting streams or after stopping
* streams.
*/
void snd_ff_stream_destroy_duplex(struct snd_ff *ff)
{
amdtp_domain_destroy(&ff->domain);
destroy_stream(ff, &ff->rx_stream);
destroy_stream(ff, &ff->tx_stream);
}
int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate,
unsigned int frames_per_period,
unsigned int frames_per_buffer)
{
unsigned int curr_rate;
enum snd_ff_clock_src src;
int err;
err = ff->spec->protocol->get_clock(ff, &curr_rate, &src);
if (err < 0)
return err;
if (ff->substreams_counter == 0 || curr_rate != rate) {
enum snd_ff_stream_mode mode;
int i;
amdtp_domain_stop(&ff->domain);
finish_session(ff);
fw_iso_resources_free(&ff->tx_resources);
fw_iso_resources_free(&ff->rx_resources);
for (i = 0; i < CIP_SFC_COUNT; ++i) {
if (amdtp_rate_table[i] == rate)
break;
}
if (i >= CIP_SFC_COUNT)
return -EINVAL;
err = snd_ff_stream_get_multiplier_mode(i, &mode);
if (err < 0)
return err;
err = amdtp_ff_set_parameters(&ff->tx_stream, rate,
ff->spec->pcm_capture_channels[mode]);
if (err < 0)
return err;
err = amdtp_ff_set_parameters(&ff->rx_stream, rate,
ff->spec->pcm_playback_channels[mode]);
if (err < 0)
return err;
err = ff->spec->protocol->allocate_resources(ff, rate);
if (err < 0)
return err;
err = amdtp_domain_set_events_per_period(&ff->domain,
frames_per_period, frames_per_buffer);
if (err < 0) {
fw_iso_resources_free(&ff->tx_resources);
fw_iso_resources_free(&ff->rx_resources);
return err;
}
}
return 0;
}
int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
{
int err;
if (ff->substreams_counter == 0)
return 0;
if (amdtp_streaming_error(&ff->tx_stream) ||
amdtp_streaming_error(&ff->rx_stream)) {
amdtp_domain_stop(&ff->domain);
finish_session(ff);
}
/*
* Regardless of current source of clock signal, drivers transfer some
* packets. Then, the device transfers packets.
*/
if (!amdtp_stream_running(&ff->rx_stream)) {
int spd = fw_parent_device(ff->unit)->max_speed;
err = ff->spec->protocol->begin_session(ff, rate);
if (err < 0)
goto error;
err = amdtp_domain_add_stream(&ff->domain, &ff->rx_stream,
ff->rx_resources.channel, spd);
if (err < 0)
goto error;
err = amdtp_domain_add_stream(&ff->domain, &ff->tx_stream,
ff->tx_resources.channel, spd);
if (err < 0)
goto error;
err = amdtp_domain_start(&ff->domain, 0);
if (err < 0)
goto error;
if (!amdtp_stream_wait_callback(&ff->rx_stream,
CALLBACK_TIMEOUT_MS) ||
!amdtp_stream_wait_callback(&ff->tx_stream,
CALLBACK_TIMEOUT_MS)) {
err = -ETIMEDOUT;
goto error;
}
err = ff->spec->protocol->switch_fetching_mode(ff, true);
if (err < 0)
goto error;
}
return 0;
error:
amdtp_domain_stop(&ff->domain);
finish_session(ff);
return err;
}
void snd_ff_stream_stop_duplex(struct snd_ff *ff)
{
if (ff->substreams_counter == 0) {
amdtp_domain_stop(&ff->domain);
finish_session(ff);
fw_iso_resources_free(&ff->tx_resources);
fw_iso_resources_free(&ff->rx_resources);
}
}
void snd_ff_stream_update_duplex(struct snd_ff *ff)
{
amdtp_domain_stop(&ff->domain);
// The device discontinue to transfer packets.
amdtp_stream_pcm_abort(&ff->tx_stream);
amdtp_stream_pcm_abort(&ff->rx_stream);
}
void snd_ff_stream_lock_changed(struct snd_ff *ff)
{
ff->dev_lock_changed = true;
wake_up(&ff->hwdep_wait);
}
int snd_ff_stream_lock_try(struct snd_ff *ff)
{
int err;
spin_lock_irq(&ff->lock);
/* user land lock this */
if (ff->dev_lock_count < 0) {
err = -EBUSY;
goto end;
}
/* this is the first time */
if (ff->dev_lock_count++ == 0)
snd_ff_stream_lock_changed(ff);
err = 0;
end:
spin_unlock_irq(&ff->lock);
return err;
}
void snd_ff_stream_lock_release(struct snd_ff *ff)
{
spin_lock_irq(&ff->lock);
if (WARN_ON(ff->dev_lock_count <= 0))
goto end;
if (--ff->dev_lock_count == 0)
snd_ff_stream_lock_changed(ff);
end:
spin_unlock_irq(&ff->lock);
}
|
