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[linux.git] / sound / firewire / fireworks / fireworks_stream.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * fireworks_stream.c - a part of driver for Fireworks based devices
4  *
5  * Copyright (c) 2013-2014 Takashi Sakamoto
6  */
7 #include "./fireworks.h"
8
9 #define CALLBACK_TIMEOUT        100
10
11 static int init_stream(struct snd_efw *efw, struct amdtp_stream *stream)
12 {
13         struct cmp_connection *conn;
14         enum cmp_direction c_dir;
15         enum amdtp_stream_direction s_dir;
16         int err;
17
18         if (stream == &efw->tx_stream) {
19                 conn = &efw->out_conn;
20                 c_dir = CMP_OUTPUT;
21                 s_dir = AMDTP_IN_STREAM;
22         } else {
23                 conn = &efw->in_conn;
24                 c_dir = CMP_INPUT;
25                 s_dir = AMDTP_OUT_STREAM;
26         }
27
28         err = cmp_connection_init(conn, efw->unit, c_dir, 0);
29         if (err < 0)
30                 return err;
31
32         err = amdtp_am824_init(stream, efw->unit, s_dir, CIP_BLOCKING);
33         if (err < 0) {
34                 amdtp_stream_destroy(stream);
35                 cmp_connection_destroy(conn);
36                 return err;
37         }
38
39         if (stream == &efw->tx_stream) {
40                 // Fireworks transmits NODATA packets with TAG0.
41                 efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
42                 // Fireworks has its own meaning for dbc.
43                 efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
44                 // Fireworks reset dbc at bus reset.
45                 efw->tx_stream.flags |= CIP_SKIP_DBC_ZERO_CHECK;
46                 // But Recent firmwares starts packets with non-zero dbc.
47                 // Driver version 5.7.6 installs firmware version 5.7.3.
48                 if (efw->is_fireworks3 &&
49                     (efw->firmware_version == 0x5070000 ||
50                      efw->firmware_version == 0x5070300 ||
51                      efw->firmware_version == 0x5080000))
52                         efw->tx_stream.flags |= CIP_UNALIGHED_DBC;
53                 // AudioFire9 always reports wrong dbs.
54                 if (efw->is_af9)
55                         efw->tx_stream.flags |= CIP_WRONG_DBS;
56                 // Firmware version 5.5 reports fixed interval for dbc.
57                 if (efw->firmware_version == 0x5050000)
58                         efw->tx_stream.ctx_data.tx.dbc_interval = 8;
59         }
60
61         return err;
62 }
63
64 static int start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
65                         unsigned int rate)
66 {
67         struct cmp_connection *conn;
68         int err;
69
70         if (stream == &efw->tx_stream)
71                 conn = &efw->out_conn;
72         else
73                 conn = &efw->in_conn;
74
75         // Establish connection via CMP.
76         err = cmp_connection_establish(conn);
77         if (err < 0)
78                 return err;
79
80         // Start amdtp stream.
81         err = amdtp_domain_add_stream(&efw->domain, stream,
82                                       conn->resources.channel, conn->speed);
83         if (err < 0) {
84                 cmp_connection_break(conn);
85                 return err;
86         }
87
88         return 0;
89 }
90
91 // This function should be called before starting the stream or after stopping
92 // the streams.
93 static void destroy_stream(struct snd_efw *efw, struct amdtp_stream *stream)
94 {
95         amdtp_stream_destroy(stream);
96
97         if (stream == &efw->tx_stream)
98                 cmp_connection_destroy(&efw->out_conn);
99         else
100                 cmp_connection_destroy(&efw->in_conn);
101 }
102
103 static int
104 check_connection_used_by_others(struct snd_efw *efw, struct amdtp_stream *s)
105 {
106         struct cmp_connection *conn;
107         bool used;
108         int err;
109
110         if (s == &efw->tx_stream)
111                 conn = &efw->out_conn;
112         else
113                 conn = &efw->in_conn;
114
115         err = cmp_connection_check_used(conn, &used);
116         if ((err >= 0) && used && !amdtp_stream_running(s)) {
117                 dev_err(&efw->unit->device,
118                         "Connection established by others: %cPCR[%d]\n",
119                         (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
120                         conn->pcr_index);
121                 err = -EBUSY;
122         }
123
124         return err;
125 }
126
127 int snd_efw_stream_init_duplex(struct snd_efw *efw)
128 {
129         int err;
130
131         err = init_stream(efw, &efw->tx_stream);
132         if (err < 0)
133                 return err;
134
135         err = init_stream(efw, &efw->rx_stream);
136         if (err < 0) {
137                 destroy_stream(efw, &efw->tx_stream);
138                 return err;
139         }
140
141         err = amdtp_domain_init(&efw->domain);
142         if (err < 0) {
143                 destroy_stream(efw, &efw->tx_stream);
144                 destroy_stream(efw, &efw->rx_stream);
145                 return err;
146         }
147
148         // set IEC61883 compliant mode (actually not fully compliant...).
149         err = snd_efw_command_set_tx_mode(efw, SND_EFW_TRANSPORT_MODE_IEC61883);
150         if (err < 0) {
151                 destroy_stream(efw, &efw->tx_stream);
152                 destroy_stream(efw, &efw->rx_stream);
153         }
154
155         return err;
156 }
157
158 static int keep_resources(struct snd_efw *efw, struct amdtp_stream *stream,
159                           unsigned int rate, unsigned int mode)
160 {
161         unsigned int pcm_channels;
162         unsigned int midi_ports;
163         struct cmp_connection *conn;
164         int err;
165
166         if (stream == &efw->tx_stream) {
167                 pcm_channels = efw->pcm_capture_channels[mode];
168                 midi_ports = efw->midi_out_ports;
169                 conn = &efw->out_conn;
170         } else {
171                 pcm_channels = efw->pcm_playback_channels[mode];
172                 midi_ports = efw->midi_in_ports;
173                 conn = &efw->in_conn;
174         }
175
176         err = amdtp_am824_set_parameters(stream, rate, pcm_channels,
177                                          midi_ports, false);
178         if (err < 0)
179                 return err;
180
181         return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream));
182 }
183
184 int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate)
185 {
186         unsigned int curr_rate;
187         int err;
188
189         // Considering JACK/FFADO streaming:
190         // TODO: This can be removed hwdep functionality becomes popular.
191         err = check_connection_used_by_others(efw, &efw->rx_stream);
192         if (err < 0)
193                 return err;
194
195         // stop streams if rate is different.
196         err = snd_efw_command_get_sampling_rate(efw, &curr_rate);
197         if (err < 0)
198                 return err;
199         if (rate == 0)
200                 rate = curr_rate;
201         if (rate != curr_rate) {
202                 amdtp_domain_stop(&efw->domain);
203
204                 cmp_connection_break(&efw->out_conn);
205                 cmp_connection_break(&efw->in_conn);
206
207                 cmp_connection_release(&efw->out_conn);
208                 cmp_connection_release(&efw->in_conn);
209         }
210
211         if (efw->substreams_counter == 0 || rate != curr_rate) {
212                 unsigned int mode;
213
214                 err = snd_efw_command_set_sampling_rate(efw, rate);
215                 if (err < 0)
216                         return err;
217
218                 err = snd_efw_get_multiplier_mode(rate, &mode);
219                 if (err < 0)
220                         return err;
221
222                 err = keep_resources(efw, &efw->tx_stream, rate, mode);
223                 if (err < 0)
224                         return err;
225
226                 err = keep_resources(efw, &efw->rx_stream, rate, mode);
227                 if (err < 0) {
228                         cmp_connection_release(&efw->in_conn);
229                         return err;
230                 }
231         }
232
233         return 0;
234 }
235
236 int snd_efw_stream_start_duplex(struct snd_efw *efw)
237 {
238         unsigned int rate;
239         int err = 0;
240
241         // Need no substreams.
242         if (efw->substreams_counter == 0)
243                 return -EIO;
244
245         if (amdtp_streaming_error(&efw->rx_stream) ||
246             amdtp_streaming_error(&efw->tx_stream)) {
247                 amdtp_domain_stop(&efw->domain);
248                 cmp_connection_break(&efw->out_conn);
249                 cmp_connection_break(&efw->in_conn);
250         }
251
252         err = snd_efw_command_get_sampling_rate(efw, &rate);
253         if (err < 0)
254                 return err;
255
256         if (!amdtp_stream_running(&efw->rx_stream)) {
257                 err = start_stream(efw, &efw->rx_stream, rate);
258                 if (err < 0)
259                         goto error;
260
261                 err = start_stream(efw, &efw->tx_stream, rate);
262                 if (err < 0)
263                         goto error;
264
265                 err = amdtp_domain_start(&efw->domain);
266                 if (err < 0)
267                         goto error;
268
269                 // Wait first callback.
270                 if (!amdtp_stream_wait_callback(&efw->rx_stream,
271                                                 CALLBACK_TIMEOUT) ||
272                     !amdtp_stream_wait_callback(&efw->tx_stream,
273                                                 CALLBACK_TIMEOUT)) {
274                         err = -ETIMEDOUT;
275                         goto error;
276                 }
277         }
278
279         return 0;
280 error:
281         amdtp_domain_stop(&efw->domain);
282
283         cmp_connection_break(&efw->out_conn);
284         cmp_connection_break(&efw->in_conn);
285
286         return err;
287 }
288
289 void snd_efw_stream_stop_duplex(struct snd_efw *efw)
290 {
291         if (efw->substreams_counter == 0) {
292                 amdtp_domain_stop(&efw->domain);
293
294                 cmp_connection_break(&efw->out_conn);
295                 cmp_connection_break(&efw->in_conn);
296
297                 cmp_connection_release(&efw->out_conn);
298                 cmp_connection_release(&efw->in_conn);
299         }
300 }
301
302 void snd_efw_stream_update_duplex(struct snd_efw *efw)
303 {
304         amdtp_domain_stop(&efw->domain);
305
306         cmp_connection_break(&efw->out_conn);
307         cmp_connection_break(&efw->in_conn);
308
309         amdtp_stream_pcm_abort(&efw->rx_stream);
310         amdtp_stream_pcm_abort(&efw->tx_stream);
311 }
312
313 void snd_efw_stream_destroy_duplex(struct snd_efw *efw)
314 {
315         amdtp_domain_destroy(&efw->domain);
316
317         destroy_stream(efw, &efw->rx_stream);
318         destroy_stream(efw, &efw->tx_stream);
319 }
320
321 void snd_efw_stream_lock_changed(struct snd_efw *efw)
322 {
323         efw->dev_lock_changed = true;
324         wake_up(&efw->hwdep_wait);
325 }
326
327 int snd_efw_stream_lock_try(struct snd_efw *efw)
328 {
329         int err;
330
331         spin_lock_irq(&efw->lock);
332
333         /* user land lock this */
334         if (efw->dev_lock_count < 0) {
335                 err = -EBUSY;
336                 goto end;
337         }
338
339         /* this is the first time */
340         if (efw->dev_lock_count++ == 0)
341                 snd_efw_stream_lock_changed(efw);
342         err = 0;
343 end:
344         spin_unlock_irq(&efw->lock);
345         return err;
346 }
347
348 void snd_efw_stream_lock_release(struct snd_efw *efw)
349 {
350         spin_lock_irq(&efw->lock);
351
352         if (WARN_ON(efw->dev_lock_count <= 0))
353                 goto end;
354         if (--efw->dev_lock_count == 0)
355                 snd_efw_stream_lock_changed(efw);
356 end:
357         spin_unlock_irq(&efw->lock);
358 }