1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 //
3 // Copyright 2021 NXP
4 //
5 // Author: Daniel Baluta <daniel.baluta@nxp.com>
6
7 #include <sound/soc.h>
8 #include <sound/sof.h>
9 #include <sound/compress_driver.h>
10 #include "sof-audio.h"
11 #include "sof-priv.h"
12 #include "sof-utils.h"
13 #include "ops.h"
14
sof_set_transferred_bytes(struct sof_compr_stream * sstream,u64 host_pos,u64 buffer_size)15 static void sof_set_transferred_bytes(struct sof_compr_stream *sstream,
16 u64 host_pos, u64 buffer_size)
17 {
18 u64 prev_pos;
19 unsigned int copied;
20
21 div64_u64_rem(sstream->copied_total, buffer_size, &prev_pos);
22
23 if (host_pos < prev_pos)
24 copied = (buffer_size - prev_pos) + host_pos;
25 else
26 copied = host_pos - prev_pos;
27
28 sstream->copied_total += copied;
29 }
30
snd_sof_compr_fragment_elapsed_work(struct work_struct * work)31 static void snd_sof_compr_fragment_elapsed_work(struct work_struct *work)
32 {
33 struct snd_sof_pcm_stream *sps =
34 container_of(work, struct snd_sof_pcm_stream,
35 period_elapsed_work);
36
37 snd_compr_fragment_elapsed(sps->cstream);
38 }
39
snd_sof_compr_init_elapsed_work(struct work_struct * work)40 void snd_sof_compr_init_elapsed_work(struct work_struct *work)
41 {
42 INIT_WORK(work, snd_sof_compr_fragment_elapsed_work);
43 }
44
45 /*
46 * sof compr fragment elapse, this could be called in irq thread context
47 */
snd_sof_compr_fragment_elapsed(struct snd_compr_stream * cstream)48 void snd_sof_compr_fragment_elapsed(struct snd_compr_stream *cstream)
49 {
50 struct snd_soc_pcm_runtime *rtd;
51 struct snd_compr_runtime *crtd;
52 struct snd_soc_component *component;
53 struct sof_compr_stream *sstream;
54 struct snd_sof_pcm *spcm;
55
56 if (!cstream)
57 return;
58
59 rtd = cstream->private_data;
60 crtd = cstream->runtime;
61 sstream = crtd->private_data;
62 component = snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
63
64 spcm = snd_sof_find_spcm_dai(component, rtd);
65 if (!spcm) {
66 dev_err(component->dev,
67 "fragment elapsed called for unknown stream!\n");
68 return;
69 }
70
71 sof_set_transferred_bytes(sstream, spcm->stream[cstream->direction].posn.host_posn,
72 crtd->buffer_size);
73
74 /* use the same workqueue-based solution as for PCM, cf. snd_sof_pcm_elapsed */
75 schedule_work(&spcm->stream[cstream->direction].period_elapsed_work);
76 }
77
create_page_table(struct snd_soc_component * component,struct snd_compr_stream * cstream,unsigned char * dma_area,size_t size)78 static int create_page_table(struct snd_soc_component *component,
79 struct snd_compr_stream *cstream,
80 unsigned char *dma_area, size_t size)
81 {
82 struct snd_dma_buffer *dmab = cstream->runtime->dma_buffer_p;
83 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
84 int dir = cstream->direction;
85 struct snd_sof_pcm *spcm;
86
87 spcm = snd_sof_find_spcm_dai(component, rtd);
88 if (!spcm)
89 return -EINVAL;
90
91 return snd_sof_create_page_table(component->dev, dmab,
92 spcm->stream[dir].page_table.area, size);
93 }
94
sof_compr_open(struct snd_soc_component * component,struct snd_compr_stream * cstream)95 static int sof_compr_open(struct snd_soc_component *component,
96 struct snd_compr_stream *cstream)
97 {
98 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
99 struct snd_compr_runtime *crtd = cstream->runtime;
100 struct sof_compr_stream *sstream;
101 struct snd_sof_pcm *spcm;
102 int dir;
103
104 sstream = kzalloc(sizeof(*sstream), GFP_KERNEL);
105 if (!sstream)
106 return -ENOMEM;
107
108 spcm = snd_sof_find_spcm_dai(component, rtd);
109 if (!spcm) {
110 kfree(sstream);
111 return -EINVAL;
112 }
113
114 dir = cstream->direction;
115
116 if (spcm->stream[dir].cstream) {
117 kfree(sstream);
118 return -EBUSY;
119 }
120
121 spcm->stream[dir].cstream = cstream;
122 spcm->stream[dir].posn.host_posn = 0;
123 spcm->stream[dir].posn.dai_posn = 0;
124 spcm->prepared[dir] = false;
125
126 crtd->private_data = sstream;
127
128 return 0;
129 }
130
sof_compr_free(struct snd_soc_component * component,struct snd_compr_stream * cstream)131 static int sof_compr_free(struct snd_soc_component *component,
132 struct snd_compr_stream *cstream)
133 {
134 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
135 struct sof_compr_stream *sstream = cstream->runtime->private_data;
136 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
137 struct sof_ipc_stream stream;
138 struct snd_sof_pcm *spcm;
139 int ret = 0;
140
141 spcm = snd_sof_find_spcm_dai(component, rtd);
142 if (!spcm)
143 return -EINVAL;
144
145 stream.hdr.size = sizeof(stream);
146 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;
147 stream.comp_id = spcm->stream[cstream->direction].comp_id;
148
149 if (spcm->prepared[cstream->direction]) {
150 ret = sof_ipc_tx_message_no_reply(sdev->ipc, &stream, sizeof(stream));
151 if (!ret)
152 spcm->prepared[cstream->direction] = false;
153 }
154
155 cancel_work_sync(&spcm->stream[cstream->direction].period_elapsed_work);
156 spcm->stream[cstream->direction].cstream = NULL;
157 kfree(sstream);
158
159 return ret;
160 }
161
sof_compr_set_params(struct snd_soc_component * component,struct snd_compr_stream * cstream,struct snd_compr_params * params)162 static int sof_compr_set_params(struct snd_soc_component *component,
163 struct snd_compr_stream *cstream, struct snd_compr_params *params)
164 {
165 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
166 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
167 struct snd_compr_runtime *crtd = cstream->runtime;
168 struct sof_ipc_pcm_params_reply ipc_params_reply;
169 struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
170 struct sof_ipc_fw_version *v = &ready->version;
171 struct sof_compr_stream *sstream;
172 struct sof_ipc_pcm_params *pcm;
173 struct snd_sof_pcm *spcm;
174 size_t ext_data_size;
175 int ret;
176
177 if (v->abi_version < SOF_ABI_VER(3, 22, 0)) {
178 dev_err(component->dev,
179 "Compress params not supported with FW ABI version %d:%d:%d\n",
180 SOF_ABI_VERSION_MAJOR(v->abi_version),
181 SOF_ABI_VERSION_MINOR(v->abi_version),
182 SOF_ABI_VERSION_PATCH(v->abi_version));
183 return -EINVAL;
184 }
185
186 sstream = crtd->private_data;
187
188 spcm = snd_sof_find_spcm_dai(component, rtd);
189
190 if (!spcm)
191 return -EINVAL;
192
193 ext_data_size = sizeof(params->codec);
194
195 if (sizeof(*pcm) + ext_data_size > sdev->ipc->max_payload_size)
196 return -EINVAL;
197
198 pcm = kzalloc(sizeof(*pcm) + ext_data_size, GFP_KERNEL);
199 if (!pcm)
200 return -ENOMEM;
201
202 cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
203 cstream->dma_buffer.dev.dev = sdev->dev;
204 ret = snd_compr_malloc_pages(cstream, crtd->buffer_size);
205 if (ret < 0)
206 goto out;
207
208 ret = create_page_table(component, cstream, crtd->dma_area, crtd->dma_bytes);
209 if (ret < 0)
210 goto out;
211
212 pcm->params.buffer.pages = PFN_UP(crtd->dma_bytes);
213 pcm->hdr.size = sizeof(*pcm) + ext_data_size;
214 pcm->hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS;
215
216 pcm->comp_id = spcm->stream[cstream->direction].comp_id;
217 pcm->params.hdr.size = sizeof(pcm->params) + ext_data_size;
218 pcm->params.buffer.phy_addr = spcm->stream[cstream->direction].page_table.addr;
219 pcm->params.buffer.size = crtd->dma_bytes;
220 pcm->params.direction = cstream->direction;
221 pcm->params.channels = params->codec.ch_out;
222 pcm->params.rate = params->codec.sample_rate;
223 pcm->params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED;
224 pcm->params.frame_fmt = SOF_IPC_FRAME_S32_LE;
225 pcm->params.sample_container_bytes =
226 snd_pcm_format_physical_width(SNDRV_PCM_FORMAT_S32) >> 3;
227 pcm->params.host_period_bytes = params->buffer.fragment_size;
228 pcm->params.ext_data_length = ext_data_size;
229
230 memcpy((u8 *)pcm->params.ext_data, ¶ms->codec, ext_data_size);
231
232 ret = sof_ipc_tx_message(sdev->ipc, pcm, sizeof(*pcm) + ext_data_size,
233 &ipc_params_reply, sizeof(ipc_params_reply));
234 if (ret < 0) {
235 dev_err(component->dev, "error ipc failed\n");
236 goto out;
237 }
238
239 ret = snd_sof_set_stream_data_offset(sdev, &spcm->stream[cstream->direction],
240 ipc_params_reply.posn_offset);
241 if (ret < 0) {
242 dev_err(component->dev, "Invalid stream data offset for Compr %d\n",
243 spcm->pcm.pcm_id);
244 goto out;
245 }
246
247 sstream->sampling_rate = params->codec.sample_rate;
248 sstream->channels = params->codec.ch_out;
249 sstream->sample_container_bytes = pcm->params.sample_container_bytes;
250
251 spcm->prepared[cstream->direction] = true;
252
253 out:
254 kfree(pcm);
255
256 return ret;
257 }
258
sof_compr_get_params(struct snd_soc_component * component,struct snd_compr_stream * cstream,struct snd_codec * params)259 static int sof_compr_get_params(struct snd_soc_component *component,
260 struct snd_compr_stream *cstream, struct snd_codec *params)
261 {
262 /* TODO: we don't query the supported codecs for now, if the
263 * application asks for an unsupported codec the set_params() will fail.
264 */
265 return 0;
266 }
267
sof_compr_trigger(struct snd_soc_component * component,struct snd_compr_stream * cstream,int cmd)268 static int sof_compr_trigger(struct snd_soc_component *component,
269 struct snd_compr_stream *cstream, int cmd)
270 {
271 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
272 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
273 struct sof_ipc_stream stream;
274 struct snd_sof_pcm *spcm;
275
276 spcm = snd_sof_find_spcm_dai(component, rtd);
277 if (!spcm)
278 return -EINVAL;
279
280 stream.hdr.size = sizeof(stream);
281 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG;
282 stream.comp_id = spcm->stream[cstream->direction].comp_id;
283
284 switch (cmd) {
285 case SNDRV_PCM_TRIGGER_START:
286 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START;
287 break;
288 case SNDRV_PCM_TRIGGER_STOP:
289 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP;
290 break;
291 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
292 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE;
293 break;
294 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
295 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE;
296 break;
297 default:
298 dev_err(component->dev, "error: unhandled trigger cmd %d\n", cmd);
299 break;
300 }
301
302 return sof_ipc_tx_message_no_reply(sdev->ipc, &stream, sizeof(stream));
303 }
304
sof_compr_copy_playback(struct snd_compr_runtime * rtd,char __user * buf,size_t count)305 static int sof_compr_copy_playback(struct snd_compr_runtime *rtd,
306 char __user *buf, size_t count)
307 {
308 void *ptr;
309 unsigned int offset, n;
310 int ret;
311
312 div_u64_rem(rtd->total_bytes_available, rtd->buffer_size, &offset);
313 ptr = rtd->dma_area + offset;
314 n = rtd->buffer_size - offset;
315
316 if (count < n) {
317 ret = copy_from_user(ptr, buf, count);
318 } else {
319 ret = copy_from_user(ptr, buf, n);
320 ret += copy_from_user(rtd->dma_area, buf + n, count - n);
321 }
322
323 return count - ret;
324 }
325
sof_compr_copy_capture(struct snd_compr_runtime * rtd,char __user * buf,size_t count)326 static int sof_compr_copy_capture(struct snd_compr_runtime *rtd,
327 char __user *buf, size_t count)
328 {
329 void *ptr;
330 unsigned int offset, n;
331 int ret;
332
333 div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset);
334 ptr = rtd->dma_area + offset;
335 n = rtd->buffer_size - offset;
336
337 if (count < n) {
338 ret = copy_to_user(buf, ptr, count);
339 } else {
340 ret = copy_to_user(buf, ptr, n);
341 ret += copy_to_user(buf + n, rtd->dma_area, count - n);
342 }
343
344 return count - ret;
345 }
346
sof_compr_copy(struct snd_soc_component * component,struct snd_compr_stream * cstream,char __user * buf,size_t count)347 static int sof_compr_copy(struct snd_soc_component *component,
348 struct snd_compr_stream *cstream,
349 char __user *buf, size_t count)
350 {
351 struct snd_compr_runtime *rtd = cstream->runtime;
352
353 if (count > rtd->buffer_size)
354 count = rtd->buffer_size;
355
356 if (cstream->direction == SND_COMPRESS_PLAYBACK)
357 return sof_compr_copy_playback(rtd, buf, count);
358 else
359 return sof_compr_copy_capture(rtd, buf, count);
360 }
361
sof_compr_pointer(struct snd_soc_component * component,struct snd_compr_stream * cstream,struct snd_compr_tstamp * tstamp)362 static int sof_compr_pointer(struct snd_soc_component *component,
363 struct snd_compr_stream *cstream,
364 struct snd_compr_tstamp *tstamp)
365 {
366 struct snd_sof_pcm *spcm;
367 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
368 struct sof_compr_stream *sstream = cstream->runtime->private_data;
369
370 spcm = snd_sof_find_spcm_dai(component, rtd);
371 if (!spcm)
372 return -EINVAL;
373
374 tstamp->sampling_rate = sstream->sampling_rate;
375 tstamp->copied_total = sstream->copied_total;
376 tstamp->pcm_io_frames = div_u64(spcm->stream[cstream->direction].posn.dai_posn,
377 sstream->channels * sstream->sample_container_bytes);
378
379 return 0;
380 }
381
382 struct snd_compress_ops sof_compressed_ops = {
383 .open = sof_compr_open,
384 .free = sof_compr_free,
385 .set_params = sof_compr_set_params,
386 .get_params = sof_compr_get_params,
387 .trigger = sof_compr_trigger,
388 .pointer = sof_compr_pointer,
389 .copy = sof_compr_copy,
390 };
391 EXPORT_SYMBOL(sof_compressed_ops);
392