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1245b700 NK |
1 | /* |
2 | * soc-compress.c -- ALSA SoC Compress | |
3 | * | |
4 | * Copyright (C) 2012 Intel Corp. | |
5 | * | |
6 | * Authors: Namarta Kohli <namartax.kohli@intel.com> | |
7 | * Ramesh Babu K V <ramesh.babu@linux.intel.com> | |
8 | * Vinod Koul <vinod.koul@linux.intel.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2 of the License, or (at your | |
13 | * option) any later version. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/workqueue.h> | |
22 | #include <sound/core.h> | |
23 | #include <sound/compress_params.h> | |
24 | #include <sound/compress_driver.h> | |
25 | #include <sound/soc.h> | |
26 | #include <sound/initval.h> | |
27 | ||
28 | static int soc_compr_open(struct snd_compr_stream *cstream) | |
29 | { | |
30 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
31 | struct snd_soc_platform *platform = rtd->platform; | |
32 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
33 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
34 | int ret = 0; | |
35 | ||
36 | if (platform->driver->compr_ops && platform->driver->compr_ops->open) { | |
37 | ret = platform->driver->compr_ops->open(cstream); | |
38 | if (ret < 0) { | |
39 | pr_err("compress asoc: can't open platform %s\n", platform->name); | |
40 | goto out; | |
41 | } | |
42 | } | |
43 | ||
44 | if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) { | |
45 | ret = rtd->dai_link->compr_ops->startup(cstream); | |
46 | if (ret < 0) { | |
47 | pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name); | |
48 | goto machine_err; | |
49 | } | |
50 | } | |
51 | ||
52 | if (cstream->direction == SND_COMPRESS_PLAYBACK) { | |
53 | cpu_dai->playback_active++; | |
54 | codec_dai->playback_active++; | |
55 | } else { | |
56 | cpu_dai->capture_active++; | |
57 | codec_dai->capture_active++; | |
58 | } | |
59 | ||
60 | cpu_dai->active++; | |
61 | codec_dai->active++; | |
62 | rtd->codec->active++; | |
63 | ||
64 | return 0; | |
65 | ||
66 | machine_err: | |
67 | if (platform->driver->compr_ops && platform->driver->compr_ops->free) | |
68 | platform->driver->compr_ops->free(cstream); | |
69 | out: | |
70 | return ret; | |
71 | } | |
72 | ||
73 | static int soc_compr_free(struct snd_compr_stream *cstream) | |
74 | { | |
75 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
76 | struct snd_soc_platform *platform = rtd->platform; | |
77 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
78 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
79 | struct snd_soc_codec *codec = rtd->codec; | |
80 | ||
81 | if (cstream->direction == SND_COMPRESS_PLAYBACK) { | |
82 | cpu_dai->playback_active--; | |
83 | codec_dai->playback_active--; | |
84 | } else { | |
85 | cpu_dai->capture_active--; | |
86 | codec_dai->capture_active--; | |
87 | } | |
88 | ||
89 | snd_soc_dai_digital_mute(codec_dai, 1); | |
90 | ||
91 | cpu_dai->active--; | |
92 | codec_dai->active--; | |
93 | codec->active--; | |
94 | ||
95 | if (!cpu_dai->active) | |
96 | cpu_dai->rate = 0; | |
97 | ||
98 | if (!codec_dai->active) | |
99 | codec_dai->rate = 0; | |
100 | ||
101 | ||
102 | if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown) | |
103 | rtd->dai_link->compr_ops->shutdown(cstream); | |
104 | ||
105 | if (platform->driver->compr_ops && platform->driver->compr_ops->free) | |
106 | platform->driver->compr_ops->free(cstream); | |
107 | cpu_dai->runtime = NULL; | |
108 | ||
109 | if (cstream->direction == SND_COMPRESS_PLAYBACK) { | |
110 | if (!rtd->pmdown_time || codec->ignore_pmdown_time || | |
111 | rtd->dai_link->ignore_pmdown_time) { | |
112 | snd_soc_dapm_stream_event(rtd, | |
113 | SNDRV_PCM_STREAM_PLAYBACK, | |
114 | SND_SOC_DAPM_STREAM_STOP); | |
115 | } else | |
116 | codec_dai->pop_wait = 1; | |
117 | schedule_delayed_work(&rtd->delayed_work, | |
118 | msecs_to_jiffies(rtd->pmdown_time)); | |
119 | } else { | |
120 | /* capture streams can be powered down now */ | |
121 | snd_soc_dapm_stream_event(rtd, | |
122 | SNDRV_PCM_STREAM_CAPTURE, | |
123 | SND_SOC_DAPM_STREAM_STOP); | |
124 | } | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd) | |
130 | { | |
131 | ||
132 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
133 | struct snd_soc_platform *platform = rtd->platform; | |
134 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
135 | int ret = 0; | |
136 | ||
137 | if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) { | |
138 | ret = platform->driver->compr_ops->trigger(cstream, cmd); | |
139 | if (ret < 0) | |
140 | return ret; | |
141 | } | |
142 | ||
143 | if (cmd == SNDRV_PCM_TRIGGER_START) | |
144 | snd_soc_dai_digital_mute(codec_dai, 0); | |
145 | else if (cmd == SNDRV_PCM_TRIGGER_STOP) | |
146 | snd_soc_dai_digital_mute(codec_dai, 1); | |
147 | ||
148 | return ret; | |
149 | } | |
150 | ||
151 | static int soc_compr_set_params(struct snd_compr_stream *cstream, | |
152 | struct snd_compr_params *params) | |
153 | { | |
154 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
155 | struct snd_soc_platform *platform = rtd->platform; | |
156 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
157 | int ret = 0; | |
158 | ||
159 | /* first we call set_params for the platform driver | |
160 | * this should configure the soc side | |
161 | * if the machine has compressed ops then we call that as well | |
162 | * expectation is that platform and machine will configure everything | |
163 | * for this compress path, like configuring pcm port for codec | |
164 | */ | |
165 | if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) { | |
166 | ret = platform->driver->compr_ops->set_params(cstream, params); | |
167 | if (ret < 0) | |
168 | return ret; | |
169 | } | |
170 | ||
171 | if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) { | |
172 | ret = rtd->dai_link->compr_ops->set_params(cstream); | |
173 | if (ret < 0) | |
174 | return ret; | |
175 | } | |
176 | ||
177 | snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, | |
178 | SND_SOC_DAPM_STREAM_START); | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | static int soc_compr_get_params(struct snd_compr_stream *cstream, | |
184 | struct snd_codec *params) | |
185 | { | |
186 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
187 | struct snd_soc_platform *platform = rtd->platform; | |
188 | int ret = 0; | |
189 | ||
190 | if (platform->driver->compr_ops && platform->driver->compr_ops->get_params) | |
191 | ret = platform->driver->compr_ops->get_params(cstream, params); | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
196 | static int soc_compr_get_caps(struct snd_compr_stream *cstream, | |
197 | struct snd_compr_caps *caps) | |
198 | { | |
199 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
200 | struct snd_soc_platform *platform = rtd->platform; | |
201 | int ret = 0; | |
202 | ||
203 | if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps) | |
204 | ret = platform->driver->compr_ops->get_caps(cstream, caps); | |
205 | ||
206 | return ret; | |
207 | } | |
208 | ||
209 | static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream, | |
210 | struct snd_compr_codec_caps *codec) | |
211 | { | |
212 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
213 | struct snd_soc_platform *platform = rtd->platform; | |
214 | int ret = 0; | |
215 | ||
216 | if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps) | |
217 | ret = platform->driver->compr_ops->get_codec_caps(cstream, codec); | |
218 | ||
219 | return ret; | |
220 | } | |
221 | ||
222 | static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes) | |
223 | { | |
224 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
225 | struct snd_soc_platform *platform = rtd->platform; | |
226 | int ret = 0; | |
227 | ||
228 | if (platform->driver->compr_ops && platform->driver->compr_ops->ack) | |
229 | ret = platform->driver->compr_ops->ack(cstream, bytes); | |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
234 | static int soc_compr_pointer(struct snd_compr_stream *cstream, | |
235 | struct snd_compr_tstamp *tstamp) | |
236 | { | |
237 | struct snd_soc_pcm_runtime *rtd = cstream->private_data; | |
238 | struct snd_soc_platform *platform = rtd->platform; | |
239 | ||
240 | if (platform->driver->compr_ops && platform->driver->compr_ops->pointer) | |
241 | platform->driver->compr_ops->pointer(cstream, tstamp); | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | /* ASoC Compress operations */ | |
247 | static struct snd_compr_ops soc_compr_ops = { | |
248 | .open = soc_compr_open, | |
249 | .free = soc_compr_free, | |
250 | .set_params = soc_compr_set_params, | |
251 | .get_params = soc_compr_get_params, | |
252 | .trigger = soc_compr_trigger, | |
253 | .pointer = soc_compr_pointer, | |
254 | .ack = soc_compr_ack, | |
255 | .get_caps = soc_compr_get_caps, | |
256 | .get_codec_caps = soc_compr_get_codec_caps | |
257 | }; | |
258 | ||
259 | /* create a new compress */ | |
260 | int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num) | |
261 | { | |
262 | struct snd_soc_codec *codec = rtd->codec; | |
263 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
264 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
265 | struct snd_compr *compr; | |
266 | char new_name[64]; | |
267 | int ret = 0, direction = 0; | |
268 | ||
269 | /* check client and interface hw capabilities */ | |
270 | snprintf(new_name, sizeof(new_name), "%s %s-%d", | |
271 | rtd->dai_link->stream_name, codec_dai->name, num); | |
272 | direction = SND_COMPRESS_PLAYBACK; | |
273 | compr = kzalloc(sizeof(*compr), GFP_KERNEL); | |
274 | if (compr == NULL) { | |
275 | snd_printk(KERN_ERR "Cannot allocate compr\n"); | |
276 | return -ENOMEM; | |
277 | } | |
278 | ||
279 | compr->ops = &soc_compr_ops; | |
280 | mutex_init(&compr->lock); | |
281 | ret = snd_compress_new(rtd->card->snd_card, num, direction, compr); | |
282 | if (ret < 0) { | |
283 | pr_err("compress asoc: can't create compress for codec %s\n", | |
284 | codec->name); | |
285 | kfree(compr); | |
286 | return ret; | |
287 | } | |
288 | ||
289 | rtd->compr = compr; | |
290 | compr->private_data = rtd; | |
291 | ||
292 | printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name, | |
293 | cpu_dai->name); | |
294 | return ret; | |
295 | } |