clk: imx: correct i.MX7D AV PLL num/denom offset
[sfrench/cifs-2.6.git] / sound / firewire / tascam / tascam-pcm.c
1 /*
2  * tascam-pcm.c - a part of driver for TASCAM FireWire series
3  *
4  * Copyright (c) 2015 Takashi Sakamoto
5  *
6  * Licensed under the terms of the GNU General Public License, version 2.
7  */
8
9 #include "tascam.h"
10
11 static int pcm_init_hw_params(struct snd_tscm *tscm,
12                               struct snd_pcm_substream *substream)
13 {
14         struct snd_pcm_runtime *runtime = substream->runtime;
15         struct snd_pcm_hardware *hw = &runtime->hw;
16         struct amdtp_stream *stream;
17         unsigned int pcm_channels;
18
19         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
20                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
21                 stream = &tscm->tx_stream;
22                 pcm_channels = tscm->spec->pcm_capture_analog_channels;
23         } else {
24                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
25                 stream = &tscm->rx_stream;
26                 pcm_channels = tscm->spec->pcm_playback_analog_channels;
27         }
28
29         if (tscm->spec->has_adat)
30                 pcm_channels += 8;
31         if (tscm->spec->has_spdif)
32                 pcm_channels += 2;
33         runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
34
35         hw->rates = SNDRV_PCM_RATE_44100 |
36                     SNDRV_PCM_RATE_48000 |
37                     SNDRV_PCM_RATE_88200 |
38                     SNDRV_PCM_RATE_96000;
39         snd_pcm_limit_hw_rates(runtime);
40
41         return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
42 }
43
44 static int pcm_open(struct snd_pcm_substream *substream)
45 {
46         struct snd_tscm *tscm = substream->private_data;
47         enum snd_tscm_clock clock;
48         unsigned int rate;
49         int err;
50
51         err = snd_tscm_stream_lock_try(tscm);
52         if (err < 0)
53                 goto end;
54
55         err = pcm_init_hw_params(tscm, substream);
56         if (err < 0)
57                 goto err_locked;
58
59         err = snd_tscm_stream_get_clock(tscm, &clock);
60         if (clock != SND_TSCM_CLOCK_INTERNAL ||
61             amdtp_stream_pcm_running(&tscm->rx_stream) ||
62             amdtp_stream_pcm_running(&tscm->tx_stream)) {
63                 err = snd_tscm_stream_get_rate(tscm, &rate);
64                 if (err < 0)
65                         goto err_locked;
66                 substream->runtime->hw.rate_min = rate;
67                 substream->runtime->hw.rate_max = rate;
68         }
69
70         snd_pcm_set_sync(substream);
71 end:
72         return err;
73 err_locked:
74         snd_tscm_stream_lock_release(tscm);
75         return err;
76 }
77
78 static int pcm_close(struct snd_pcm_substream *substream)
79 {
80         struct snd_tscm *tscm = substream->private_data;
81
82         snd_tscm_stream_lock_release(tscm);
83
84         return 0;
85 }
86
87 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
88                                  struct snd_pcm_hw_params *hw_params)
89 {
90         struct snd_tscm *tscm = substream->private_data;
91         int err;
92
93         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
94                                                params_buffer_bytes(hw_params));
95         if (err < 0)
96                 return err;
97
98         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
99                 mutex_lock(&tscm->mutex);
100                 tscm->substreams_counter++;
101                 mutex_unlock(&tscm->mutex);
102         }
103
104         return 0;
105 }
106
107 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
108                                   struct snd_pcm_hw_params *hw_params)
109 {
110         struct snd_tscm *tscm = substream->private_data;
111         int err;
112
113         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
114                                                params_buffer_bytes(hw_params));
115         if (err < 0)
116                 return err;
117
118         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
119                 mutex_lock(&tscm->mutex);
120                 tscm->substreams_counter++;
121                 mutex_unlock(&tscm->mutex);
122         }
123
124         return 0;
125 }
126
127 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
128 {
129         struct snd_tscm *tscm = substream->private_data;
130
131         mutex_lock(&tscm->mutex);
132
133         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
134                 tscm->substreams_counter--;
135
136         snd_tscm_stream_stop_duplex(tscm);
137
138         mutex_unlock(&tscm->mutex);
139
140         return snd_pcm_lib_free_vmalloc_buffer(substream);
141 }
142
143 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
144 {
145         struct snd_tscm *tscm = substream->private_data;
146
147         mutex_lock(&tscm->mutex);
148
149         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
150                 tscm->substreams_counter--;
151
152         snd_tscm_stream_stop_duplex(tscm);
153
154         mutex_unlock(&tscm->mutex);
155
156         return snd_pcm_lib_free_vmalloc_buffer(substream);
157 }
158
159 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
160 {
161         struct snd_tscm *tscm = substream->private_data;
162         struct snd_pcm_runtime *runtime = substream->runtime;
163         int err;
164
165         mutex_lock(&tscm->mutex);
166
167         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
168         if (err >= 0)
169                 amdtp_stream_pcm_prepare(&tscm->tx_stream);
170
171         mutex_unlock(&tscm->mutex);
172
173         return err;
174 }
175
176 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
177 {
178         struct snd_tscm *tscm = substream->private_data;
179         struct snd_pcm_runtime *runtime = substream->runtime;
180         int err;
181
182         mutex_lock(&tscm->mutex);
183
184         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
185         if (err >= 0)
186                 amdtp_stream_pcm_prepare(&tscm->rx_stream);
187
188         mutex_unlock(&tscm->mutex);
189
190         return err;
191 }
192
193 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
194 {
195         struct snd_tscm *tscm = substream->private_data;
196
197         switch (cmd) {
198         case SNDRV_PCM_TRIGGER_START:
199                 amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
200                 break;
201         case SNDRV_PCM_TRIGGER_STOP:
202                 amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
203                 break;
204         default:
205                 return -EINVAL;
206         }
207
208         return 0;
209 }
210
211 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
212 {
213         struct snd_tscm *tscm = substream->private_data;
214
215         switch (cmd) {
216         case SNDRV_PCM_TRIGGER_START:
217                 amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
218                 break;
219         case SNDRV_PCM_TRIGGER_STOP:
220                 amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
221                 break;
222         default:
223                 return -EINVAL;
224         }
225
226         return 0;
227 }
228
229 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
230 {
231         struct snd_tscm *tscm = sbstrm->private_data;
232
233         return amdtp_stream_pcm_pointer(&tscm->tx_stream);
234 }
235
236 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
237 {
238         struct snd_tscm *tscm = sbstrm->private_data;
239
240         return amdtp_stream_pcm_pointer(&tscm->rx_stream);
241 }
242
243 static int pcm_capture_ack(struct snd_pcm_substream *substream)
244 {
245         struct snd_tscm *tscm = substream->private_data;
246
247         return amdtp_stream_pcm_ack(&tscm->tx_stream);
248 }
249
250 static int pcm_playback_ack(struct snd_pcm_substream *substream)
251 {
252         struct snd_tscm *tscm = substream->private_data;
253
254         return amdtp_stream_pcm_ack(&tscm->rx_stream);
255 }
256
257 int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
258 {
259         static const struct snd_pcm_ops capture_ops = {
260                 .open           = pcm_open,
261                 .close          = pcm_close,
262                 .ioctl          = snd_pcm_lib_ioctl,
263                 .hw_params      = pcm_capture_hw_params,
264                 .hw_free        = pcm_capture_hw_free,
265                 .prepare        = pcm_capture_prepare,
266                 .trigger        = pcm_capture_trigger,
267                 .pointer        = pcm_capture_pointer,
268                 .ack            = pcm_capture_ack,
269                 .page           = snd_pcm_lib_get_vmalloc_page,
270         };
271         static const struct snd_pcm_ops playback_ops = {
272                 .open           = pcm_open,
273                 .close          = pcm_close,
274                 .ioctl          = snd_pcm_lib_ioctl,
275                 .hw_params      = pcm_playback_hw_params,
276                 .hw_free        = pcm_playback_hw_free,
277                 .prepare        = pcm_playback_prepare,
278                 .trigger        = pcm_playback_trigger,
279                 .pointer        = pcm_playback_pointer,
280                 .ack            = pcm_playback_ack,
281                 .page           = snd_pcm_lib_get_vmalloc_page,
282         };
283         struct snd_pcm *pcm;
284         int err;
285
286         err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
287         if (err < 0)
288                 return err;
289
290         pcm->private_data = tscm;
291         snprintf(pcm->name, sizeof(pcm->name),
292                  "%s PCM", tscm->card->shortname);
293         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
294         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
295
296         return 0;
297 }