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a4b12990 MB |
1 | /* |
2 | * Intel Baytrail SST PCM Support | |
3 | * Copyright (c) 2014, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/dma-mapping.h> | |
17 | #include <linux/slab.h> | |
18 | #include <sound/core.h> | |
19 | #include <sound/pcm.h> | |
20 | #include <sound/pcm_params.h> | |
21 | #include <sound/soc.h> | |
22 | #include "sst-baytrail-ipc.h" | |
23 | #include "sst-dsp-priv.h" | |
24 | #include "sst-dsp.h" | |
25 | ||
26 | #define BYT_PCM_COUNT 2 | |
27 | ||
28 | static const struct snd_pcm_hardware sst_byt_pcm_hardware = { | |
29 | .info = SNDRV_PCM_INFO_MMAP | | |
30 | SNDRV_PCM_INFO_MMAP_VALID | | |
31 | SNDRV_PCM_INFO_INTERLEAVED | | |
32 | SNDRV_PCM_INFO_PAUSE | | |
33 | SNDRV_PCM_INFO_RESUME, | |
34 | .formats = SNDRV_PCM_FMTBIT_S16_LE | | |
8e897618 | 35 | SNDRV_PCM_FMTBIT_S24_LE, |
a4b12990 MB |
36 | .period_bytes_min = 384, |
37 | .period_bytes_max = 48000, | |
38 | .periods_min = 2, | |
39 | .periods_max = 250, | |
40 | .buffer_bytes_max = 96000, | |
41 | }; | |
42 | ||
43 | /* private data for each PCM DSP stream */ | |
44 | struct sst_byt_pcm_data { | |
45 | struct sst_byt_stream *stream; | |
46 | struct snd_pcm_substream *substream; | |
47 | struct mutex mutex; | |
c83649e3 JN |
48 | |
49 | /* latest DSP DMA hw pointer */ | |
50 | u32 hw_ptr; | |
af94aa55 LG |
51 | |
52 | struct work_struct work; | |
a4b12990 MB |
53 | }; |
54 | ||
55 | /* private data for the driver */ | |
56 | struct sst_byt_priv_data { | |
57 | /* runtime DSP */ | |
58 | struct sst_byt *byt; | |
59 | ||
60 | /* DAI data */ | |
61 | struct sst_byt_pcm_data pcm[BYT_PCM_COUNT]; | |
b80d19c1 JN |
62 | |
63 | /* flag indicating is stream context restore needed after suspend */ | |
64 | bool restore_stream; | |
a4b12990 MB |
65 | }; |
66 | ||
67 | /* this may get called several times by oss emulation */ | |
68 | static int sst_byt_pcm_hw_params(struct snd_pcm_substream *substream, | |
69 | struct snd_pcm_hw_params *params) | |
70 | { | |
71 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
72 | struct sst_byt_priv_data *pdata = | |
73 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 74 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
75 | struct sst_byt *byt = pdata->byt; |
76 | u32 rate, bits; | |
77 | u8 channels; | |
78 | int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); | |
79 | ||
80 | dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data); | |
81 | ||
82 | ret = sst_byt_stream_type(byt, pcm_data->stream, | |
83 | 1, 1, !playback); | |
84 | if (ret < 0) { | |
85 | dev_err(rtd->dev, "failed to set stream format %d\n", ret); | |
86 | return ret; | |
87 | } | |
88 | ||
89 | rate = params_rate(params); | |
90 | ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate); | |
91 | if (ret < 0) { | |
92 | dev_err(rtd->dev, "could not set rate %d\n", rate); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | bits = snd_pcm_format_width(params_format(params)); | |
97 | ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits); | |
98 | if (ret < 0) { | |
99 | dev_err(rtd->dev, "could not set formats %d\n", | |
100 | params_rate(params)); | |
101 | return ret; | |
102 | } | |
103 | ||
104 | channels = (u8)(params_channels(params) & 0xF); | |
105 | ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels); | |
106 | if (ret < 0) { | |
107 | dev_err(rtd->dev, "could not set channels %d\n", | |
108 | params_rate(params)); | |
109 | return ret; | |
110 | } | |
111 | ||
112 | snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); | |
113 | ||
114 | ret = sst_byt_stream_buffer(byt, pcm_data->stream, | |
115 | substream->dma_buffer.addr, | |
116 | params_buffer_bytes(params)); | |
117 | if (ret < 0) { | |
118 | dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret); | |
119 | return ret; | |
120 | } | |
121 | ||
122 | ret = sst_byt_stream_commit(byt, pcm_data->stream); | |
123 | if (ret < 0) { | |
124 | dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret); | |
125 | return ret; | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | static int sst_byt_pcm_hw_free(struct snd_pcm_substream *substream) | |
132 | { | |
133 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
134 | ||
135 | dev_dbg(rtd->dev, "PCM: hw_free\n"); | |
136 | snd_pcm_lib_free_pages(substream); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
af94aa55 LG |
141 | static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream) |
142 | { | |
143 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
144 | struct sst_byt_priv_data *pdata = | |
145 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 146 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
af94aa55 LG |
147 | struct sst_byt *byt = pdata->byt; |
148 | int ret; | |
149 | ||
150 | /* commit stream using existing stream params */ | |
151 | ret = sst_byt_stream_commit(byt, pcm_data->stream); | |
152 | if (ret < 0) { | |
153 | dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret); | |
154 | return ret; | |
155 | } | |
156 | ||
157 | sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr); | |
158 | ||
159 | dev_dbg(rtd->dev, "stream context restored at offset %d\n", | |
160 | pcm_data->hw_ptr); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | static void sst_byt_pcm_work(struct work_struct *work) | |
166 | { | |
167 | struct sst_byt_pcm_data *pcm_data = | |
168 | container_of(work, struct sst_byt_pcm_data, work); | |
169 | ||
2fa190ce KS |
170 | if (snd_pcm_running(pcm_data->substream)) |
171 | sst_byt_pcm_restore_stream_context(pcm_data->substream); | |
af94aa55 LG |
172 | } |
173 | ||
a4b12990 MB |
174 | static int sst_byt_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
175 | { | |
176 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
177 | struct sst_byt_priv_data *pdata = | |
178 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 179 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
180 | struct sst_byt *byt = pdata->byt; |
181 | ||
182 | dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd); | |
183 | ||
184 | switch (cmd) { | |
185 | case SNDRV_PCM_TRIGGER_START: | |
58dcc488 | 186 | pcm_data->hw_ptr = 0; |
a6686ed5 | 187 | sst_byt_stream_start(byt, pcm_data->stream, 0); |
a4b12990 MB |
188 | break; |
189 | case SNDRV_PCM_TRIGGER_RESUME: | |
b80d19c1 JN |
190 | if (pdata->restore_stream == true) |
191 | schedule_work(&pcm_data->work); | |
192 | else | |
193 | sst_byt_stream_resume(byt, pcm_data->stream); | |
af94aa55 | 194 | break; |
a4b12990 MB |
195 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
196 | sst_byt_stream_resume(byt, pcm_data->stream); | |
197 | break; | |
198 | case SNDRV_PCM_TRIGGER_STOP: | |
199 | sst_byt_stream_stop(byt, pcm_data->stream); | |
200 | break; | |
201 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
b80d19c1 | 202 | pdata->restore_stream = false; |
a4b12990 MB |
203 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
204 | sst_byt_stream_pause(byt, pcm_data->stream); | |
205 | break; | |
206 | default: | |
207 | break; | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data) | |
214 | { | |
215 | struct sst_byt_pcm_data *pcm_data = data; | |
216 | struct snd_pcm_substream *substream = pcm_data->substream; | |
217 | struct snd_pcm_runtime *runtime = substream->runtime; | |
218 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
c83649e3 JN |
219 | struct sst_byt_priv_data *pdata = |
220 | snd_soc_platform_get_drvdata(rtd->platform); | |
221 | struct sst_byt *byt = pdata->byt; | |
222 | u32 pos, hw_pos; | |
a4b12990 | 223 | |
c83649e3 JN |
224 | hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream, |
225 | snd_pcm_lib_buffer_bytes(substream)); | |
226 | pcm_data->hw_ptr = hw_pos; | |
a4b12990 MB |
227 | pos = frames_to_bytes(runtime, |
228 | (runtime->control->appl_ptr % | |
229 | runtime->buffer_size)); | |
230 | ||
c83649e3 | 231 | dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos); |
a4b12990 MB |
232 | |
233 | snd_pcm_period_elapsed(substream); | |
234 | return pos; | |
235 | } | |
236 | ||
237 | static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream) | |
238 | { | |
239 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
240 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3a46c7b7 LG |
241 | struct sst_byt_priv_data *pdata = |
242 | snd_soc_platform_get_drvdata(rtd->platform); | |
243 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; | |
a4b12990 | 244 | |
c83649e3 | 245 | dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr); |
a4b12990 | 246 | |
c83649e3 | 247 | return bytes_to_frames(runtime, pcm_data->hw_ptr); |
a4b12990 MB |
248 | } |
249 | ||
250 | static int sst_byt_pcm_open(struct snd_pcm_substream *substream) | |
251 | { | |
252 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
253 | struct sst_byt_priv_data *pdata = | |
254 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 255 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
256 | struct sst_byt *byt = pdata->byt; |
257 | ||
258 | dev_dbg(rtd->dev, "PCM: open\n"); | |
259 | ||
a4b12990 MB |
260 | mutex_lock(&pcm_data->mutex); |
261 | ||
a4b12990 MB |
262 | pcm_data->substream = substream; |
263 | ||
264 | snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware); | |
265 | ||
8c44b2b1 | 266 | pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1, |
a4b12990 MB |
267 | byt_notify_pointer, pcm_data); |
268 | if (pcm_data->stream == NULL) { | |
269 | dev_err(rtd->dev, "failed to create stream\n"); | |
270 | mutex_unlock(&pcm_data->mutex); | |
271 | return -EINVAL; | |
272 | } | |
273 | ||
274 | mutex_unlock(&pcm_data->mutex); | |
275 | return 0; | |
276 | } | |
277 | ||
278 | static int sst_byt_pcm_close(struct snd_pcm_substream *substream) | |
279 | { | |
280 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
281 | struct sst_byt_priv_data *pdata = | |
282 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 283 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
284 | struct sst_byt *byt = pdata->byt; |
285 | int ret; | |
286 | ||
287 | dev_dbg(rtd->dev, "PCM: close\n"); | |
288 | ||
2fa190ce | 289 | cancel_work_sync(&pcm_data->work); |
a4b12990 MB |
290 | mutex_lock(&pcm_data->mutex); |
291 | ret = sst_byt_stream_free(byt, pcm_data->stream); | |
292 | if (ret < 0) { | |
293 | dev_dbg(rtd->dev, "Free stream fail\n"); | |
294 | goto out; | |
295 | } | |
296 | pcm_data->stream = NULL; | |
297 | ||
298 | out: | |
299 | mutex_unlock(&pcm_data->mutex); | |
300 | return ret; | |
301 | } | |
302 | ||
303 | static int sst_byt_pcm_mmap(struct snd_pcm_substream *substream, | |
304 | struct vm_area_struct *vma) | |
305 | { | |
306 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
307 | ||
308 | dev_dbg(rtd->dev, "PCM: mmap\n"); | |
309 | return snd_pcm_lib_default_mmap(substream, vma); | |
310 | } | |
311 | ||
312 | static struct snd_pcm_ops sst_byt_pcm_ops = { | |
313 | .open = sst_byt_pcm_open, | |
314 | .close = sst_byt_pcm_close, | |
315 | .ioctl = snd_pcm_lib_ioctl, | |
316 | .hw_params = sst_byt_pcm_hw_params, | |
317 | .hw_free = sst_byt_pcm_hw_free, | |
318 | .trigger = sst_byt_pcm_trigger, | |
319 | .pointer = sst_byt_pcm_pointer, | |
320 | .mmap = sst_byt_pcm_mmap, | |
321 | }; | |
322 | ||
a4b12990 MB |
323 | static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd) |
324 | { | |
325 | struct snd_pcm *pcm = rtd->pcm; | |
326 | size_t size; | |
dfe1951b JN |
327 | struct snd_soc_platform *platform = rtd->platform; |
328 | struct sst_pdata *pdata = dev_get_platdata(platform->dev); | |
a4b12990 MB |
329 | int ret = 0; |
330 | ||
a4b12990 MB |
331 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream || |
332 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { | |
333 | size = sst_byt_pcm_hardware.buffer_bytes_max; | |
334 | ret = snd_pcm_lib_preallocate_pages_for_all(pcm, | |
335 | SNDRV_DMA_TYPE_DEV, | |
dfe1951b | 336 | pdata->dma_dev, |
a4b12990 MB |
337 | size, size); |
338 | if (ret) { | |
339 | dev_err(rtd->dev, "dma buffer allocation failed %d\n", | |
340 | ret); | |
341 | return ret; | |
342 | } | |
343 | } | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
348 | static struct snd_soc_dai_driver byt_dais[] = { | |
349 | { | |
49fee178 | 350 | .name = "Baytrail PCM", |
a4b12990 MB |
351 | .playback = { |
352 | .stream_name = "System Playback", | |
353 | .channels_min = 2, | |
354 | .channels_max = 2, | |
355 | .rates = SNDRV_PCM_RATE_48000, | |
356 | .formats = SNDRV_PCM_FMTBIT_S24_3LE | | |
357 | SNDRV_PCM_FMTBIT_S16_LE, | |
358 | }, | |
a4b12990 MB |
359 | .capture = { |
360 | .stream_name = "Analog Capture", | |
361 | .channels_min = 2, | |
362 | .channels_max = 2, | |
363 | .rates = SNDRV_PCM_RATE_48000, | |
364 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
365 | }, | |
366 | }, | |
367 | }; | |
368 | ||
369 | static int sst_byt_pcm_probe(struct snd_soc_platform *platform) | |
370 | { | |
371 | struct sst_pdata *plat_data = dev_get_platdata(platform->dev); | |
372 | struct sst_byt_priv_data *priv_data; | |
373 | int i; | |
374 | ||
375 | if (!plat_data) | |
376 | return -ENODEV; | |
377 | ||
378 | priv_data = devm_kzalloc(platform->dev, sizeof(*priv_data), | |
379 | GFP_KERNEL); | |
380 | priv_data->byt = plat_data->dsp; | |
381 | snd_soc_platform_set_drvdata(platform, priv_data); | |
382 | ||
49fee178 | 383 | for (i = 0; i < BYT_PCM_COUNT; i++) { |
a4b12990 | 384 | mutex_init(&priv_data->pcm[i].mutex); |
af94aa55 LG |
385 | INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work); |
386 | } | |
a4b12990 MB |
387 | |
388 | return 0; | |
389 | } | |
390 | ||
391 | static int sst_byt_pcm_remove(struct snd_soc_platform *platform) | |
392 | { | |
393 | return 0; | |
394 | } | |
395 | ||
396 | static struct snd_soc_platform_driver byt_soc_platform = { | |
397 | .probe = sst_byt_pcm_probe, | |
398 | .remove = sst_byt_pcm_remove, | |
399 | .ops = &sst_byt_pcm_ops, | |
400 | .pcm_new = sst_byt_pcm_new, | |
a4b12990 MB |
401 | }; |
402 | ||
403 | static const struct snd_soc_component_driver byt_dai_component = { | |
404 | .name = "byt-dai", | |
405 | }; | |
406 | ||
af94aa55 | 407 | #ifdef CONFIG_PM |
af94aa55 LG |
408 | static int sst_byt_pcm_dev_suspend_late(struct device *dev) |
409 | { | |
410 | struct sst_pdata *sst_pdata = dev_get_platdata(dev); | |
b80d19c1 | 411 | struct sst_byt_priv_data *priv_data = dev_get_drvdata(dev); |
af94aa55 LG |
412 | int ret; |
413 | ||
414 | dev_dbg(dev, "suspending late\n"); | |
415 | ||
416 | ret = sst_byt_dsp_suspend_late(dev, sst_pdata); | |
417 | if (ret < 0) { | |
418 | dev_err(dev, "failed to suspend %d\n", ret); | |
419 | return ret; | |
420 | } | |
421 | ||
b80d19c1 JN |
422 | priv_data->restore_stream = true; |
423 | ||
af94aa55 LG |
424 | return ret; |
425 | } | |
426 | ||
427 | static int sst_byt_pcm_dev_resume_early(struct device *dev) | |
428 | { | |
429 | struct sst_pdata *sst_pdata = dev_get_platdata(dev); | |
9246539b | 430 | int ret; |
af94aa55 LG |
431 | |
432 | dev_dbg(dev, "resume early\n"); | |
433 | ||
434 | /* load fw and boot DSP */ | |
9246539b JN |
435 | ret = sst_byt_dsp_boot(dev, sst_pdata); |
436 | if (ret) | |
437 | return ret; | |
af94aa55 LG |
438 | |
439 | /* wait for FW to finish booting */ | |
440 | return sst_byt_dsp_wait_for_ready(dev, sst_pdata); | |
441 | } | |
442 | ||
443 | static const struct dev_pm_ops sst_byt_pm_ops = { | |
af94aa55 LG |
444 | .suspend_late = sst_byt_pcm_dev_suspend_late, |
445 | .resume_early = sst_byt_pcm_dev_resume_early, | |
af94aa55 LG |
446 | }; |
447 | ||
448 | #define SST_BYT_PM_OPS (&sst_byt_pm_ops) | |
449 | #else | |
450 | #define SST_BYT_PM_OPS NULL | |
451 | #endif | |
452 | ||
a4b12990 MB |
453 | static int sst_byt_pcm_dev_probe(struct platform_device *pdev) |
454 | { | |
455 | struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev); | |
456 | int ret; | |
457 | ||
458 | ret = sst_byt_dsp_init(&pdev->dev, sst_pdata); | |
459 | if (ret < 0) | |
460 | return -ENODEV; | |
461 | ||
462 | ret = snd_soc_register_platform(&pdev->dev, &byt_soc_platform); | |
463 | if (ret < 0) | |
464 | goto err_plat; | |
465 | ||
466 | ret = snd_soc_register_component(&pdev->dev, &byt_dai_component, | |
467 | byt_dais, ARRAY_SIZE(byt_dais)); | |
468 | if (ret < 0) | |
469 | goto err_comp; | |
470 | ||
471 | return 0; | |
472 | ||
473 | err_comp: | |
474 | snd_soc_unregister_platform(&pdev->dev); | |
475 | err_plat: | |
476 | sst_byt_dsp_free(&pdev->dev, sst_pdata); | |
477 | return ret; | |
478 | } | |
479 | ||
480 | static int sst_byt_pcm_dev_remove(struct platform_device *pdev) | |
481 | { | |
482 | struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev); | |
483 | ||
484 | snd_soc_unregister_platform(&pdev->dev); | |
485 | snd_soc_unregister_component(&pdev->dev); | |
486 | sst_byt_dsp_free(&pdev->dev, sst_pdata); | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | static struct platform_driver sst_byt_pcm_driver = { | |
492 | .driver = { | |
493 | .name = "baytrail-pcm-audio", | |
af94aa55 | 494 | .pm = SST_BYT_PM_OPS, |
a4b12990 MB |
495 | }, |
496 | ||
497 | .probe = sst_byt_pcm_dev_probe, | |
498 | .remove = sst_byt_pcm_dev_remove, | |
499 | }; | |
500 | module_platform_driver(sst_byt_pcm_driver); | |
501 | ||
502 | MODULE_AUTHOR("Jarkko Nikula"); | |
503 | MODULE_DESCRIPTION("Baytrail PCM"); | |
504 | MODULE_LICENSE("GPL v2"); | |
505 | MODULE_ALIAS("platform:baytrail-pcm-audio"); |