1 /*
2 * sst_platform.c - Intel MID Platform driver
3 *
4 * Copyright (C) 2010 Intel Corp
5 * Author: Vinod Koul <vinod.koul@intel.com>
6 * Author: Harsha Priya <priya.harsha@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 *
25 */
26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27
28 #include <linux/slab.h>
29 #include <linux/io.h>
30 #include <linux/module.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/soc.h>
35 #include "sst_platform.h"
36
37 static struct sst_device *sst;
38 static DEFINE_MUTEX(sst_lock);
39
sst_register_dsp(struct sst_device * dev)40 int sst_register_dsp(struct sst_device *dev)
41 {
42 BUG_ON(!dev);
43 if (!try_module_get(dev->dev->driver->owner))
44 return -ENODEV;
45 mutex_lock(&sst_lock);
46 if (sst) {
47 pr_err("we already have a device %s\n", sst->name);
48 module_put(dev->dev->driver->owner);
49 mutex_unlock(&sst_lock);
50 return -EEXIST;
51 }
52 pr_debug("registering device %s\n", dev->name);
53 sst = dev;
54 mutex_unlock(&sst_lock);
55 return 0;
56 }
57 EXPORT_SYMBOL_GPL(sst_register_dsp);
58
sst_unregister_dsp(struct sst_device * dev)59 int sst_unregister_dsp(struct sst_device *dev)
60 {
61 BUG_ON(!dev);
62 if (dev != sst)
63 return -EINVAL;
64
65 mutex_lock(&sst_lock);
66
67 if (!sst) {
68 mutex_unlock(&sst_lock);
69 return -EIO;
70 }
71
72 module_put(sst->dev->driver->owner);
73 pr_debug("unreg %s\n", sst->name);
74 sst = NULL;
75 mutex_unlock(&sst_lock);
76 return 0;
77 }
78 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
79
80 static struct snd_pcm_hardware sst_platform_pcm_hw = {
81 .info = (SNDRV_PCM_INFO_INTERLEAVED |
82 SNDRV_PCM_INFO_DOUBLE |
83 SNDRV_PCM_INFO_PAUSE |
84 SNDRV_PCM_INFO_RESUME |
85 SNDRV_PCM_INFO_MMAP|
86 SNDRV_PCM_INFO_MMAP_VALID |
87 SNDRV_PCM_INFO_BLOCK_TRANSFER |
88 SNDRV_PCM_INFO_SYNC_START),
89 .formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 |
90 SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 |
91 SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32),
92 .rates = (SNDRV_PCM_RATE_8000|
93 SNDRV_PCM_RATE_44100 |
94 SNDRV_PCM_RATE_48000),
95 .rate_min = SST_MIN_RATE,
96 .rate_max = SST_MAX_RATE,
97 .channels_min = SST_MIN_CHANNEL,
98 .channels_max = SST_MAX_CHANNEL,
99 .buffer_bytes_max = SST_MAX_BUFFER,
100 .period_bytes_min = SST_MIN_PERIOD_BYTES,
101 .period_bytes_max = SST_MAX_PERIOD_BYTES,
102 .periods_min = SST_MIN_PERIODS,
103 .periods_max = SST_MAX_PERIODS,
104 .fifo_size = SST_FIFO_SIZE,
105 };
106
107 /* MFLD - MSIC */
108 static struct snd_soc_dai_driver sst_platform_dai[] = {
109 {
110 .name = "Headset-cpu-dai",
111 .id = 0,
112 .playback = {
113 .channels_min = SST_STEREO,
114 .channels_max = SST_STEREO,
115 .rates = SNDRV_PCM_RATE_48000,
116 .formats = SNDRV_PCM_FMTBIT_S24_LE,
117 },
118 .capture = {
119 .channels_min = 1,
120 .channels_max = 5,
121 .rates = SNDRV_PCM_RATE_48000,
122 .formats = SNDRV_PCM_FMTBIT_S24_LE,
123 },
124 },
125 {
126 .name = "Speaker-cpu-dai",
127 .id = 1,
128 .playback = {
129 .channels_min = SST_MONO,
130 .channels_max = SST_STEREO,
131 .rates = SNDRV_PCM_RATE_48000,
132 .formats = SNDRV_PCM_FMTBIT_S24_LE,
133 },
134 },
135 {
136 .name = "Vibra1-cpu-dai",
137 .id = 2,
138 .playback = {
139 .channels_min = SST_MONO,
140 .channels_max = SST_MONO,
141 .rates = SNDRV_PCM_RATE_48000,
142 .formats = SNDRV_PCM_FMTBIT_S24_LE,
143 },
144 },
145 {
146 .name = "Vibra2-cpu-dai",
147 .id = 3,
148 .playback = {
149 .channels_min = SST_MONO,
150 .channels_max = SST_STEREO,
151 .rates = SNDRV_PCM_RATE_48000,
152 .formats = SNDRV_PCM_FMTBIT_S24_LE,
153 },
154 },
155 };
156
157 /* helper functions */
sst_set_stream_status(struct sst_runtime_stream * stream,int state)158 static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
159 int state)
160 {
161 unsigned long flags;
162 spin_lock_irqsave(&stream->status_lock, flags);
163 stream->stream_status = state;
164 spin_unlock_irqrestore(&stream->status_lock, flags);
165 }
166
sst_get_stream_status(struct sst_runtime_stream * stream)167 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
168 {
169 int state;
170 unsigned long flags;
171
172 spin_lock_irqsave(&stream->status_lock, flags);
173 state = stream->stream_status;
174 spin_unlock_irqrestore(&stream->status_lock, flags);
175 return state;
176 }
177
sst_fill_pcm_params(struct snd_pcm_substream * substream,struct sst_pcm_params * param)178 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
179 struct sst_pcm_params *param)
180 {
181
182 param->codec = SST_CODEC_TYPE_PCM;
183 param->num_chan = (u8) substream->runtime->channels;
184 param->pcm_wd_sz = substream->runtime->sample_bits;
185 param->reserved = 0;
186 param->sfreq = substream->runtime->rate;
187 param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
188 param->period_count = substream->runtime->period_size;
189 param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
190 pr_debug("period_cnt = %d\n", param->period_count);
191 pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
192 }
193
sst_platform_alloc_stream(struct snd_pcm_substream * substream)194 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
195 {
196 struct sst_runtime_stream *stream =
197 substream->runtime->private_data;
198 struct sst_pcm_params param = {0};
199 struct sst_stream_params str_params = {0};
200 int ret_val;
201
202 /* set codec params and inform SST driver the same */
203 sst_fill_pcm_params(substream, ¶m);
204 substream->runtime->dma_area = substream->dma_buffer.area;
205 str_params.sparams = param;
206 str_params.codec = param.codec;
207 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
208 str_params.ops = STREAM_OPS_PLAYBACK;
209 str_params.device_type = substream->pcm->device + 1;
210 pr_debug("Playbck stream,Device %d\n",
211 substream->pcm->device);
212 } else {
213 str_params.ops = STREAM_OPS_CAPTURE;
214 str_params.device_type = SND_SST_DEVICE_CAPTURE;
215 pr_debug("Capture stream,Device %d\n",
216 substream->pcm->device);
217 }
218 ret_val = stream->ops->open(&str_params);
219 pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
220 if (ret_val < 0)
221 return ret_val;
222
223 stream->stream_info.str_id = ret_val;
224 pr_debug("str id : %d\n", stream->stream_info.str_id);
225 return ret_val;
226 }
227
sst_period_elapsed(void * mad_substream)228 static void sst_period_elapsed(void *mad_substream)
229 {
230 struct snd_pcm_substream *substream = mad_substream;
231 struct sst_runtime_stream *stream;
232 int status;
233
234 if (!substream || !substream->runtime)
235 return;
236 stream = substream->runtime->private_data;
237 if (!stream)
238 return;
239 status = sst_get_stream_status(stream);
240 if (status != SST_PLATFORM_RUNNING)
241 return;
242 snd_pcm_period_elapsed(substream);
243 }
244
sst_platform_init_stream(struct snd_pcm_substream * substream)245 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
246 {
247 struct sst_runtime_stream *stream =
248 substream->runtime->private_data;
249 int ret_val;
250
251 pr_debug("setting buffer ptr param\n");
252 sst_set_stream_status(stream, SST_PLATFORM_INIT);
253 stream->stream_info.period_elapsed = sst_period_elapsed;
254 stream->stream_info.mad_substream = substream;
255 stream->stream_info.buffer_ptr = 0;
256 stream->stream_info.sfreq = substream->runtime->rate;
257 ret_val = stream->ops->device_control(
258 SST_SND_STREAM_INIT, &stream->stream_info);
259 if (ret_val)
260 pr_err("control_set ret error %d\n", ret_val);
261 return ret_val;
262
263 }
264 /* end -- helper functions */
265
sst_platform_open(struct snd_pcm_substream * substream)266 static int sst_platform_open(struct snd_pcm_substream *substream)
267 {
268 struct snd_pcm_runtime *runtime = substream->runtime;
269 struct sst_runtime_stream *stream;
270 int ret_val;
271
272 pr_debug("sst_platform_open called\n");
273
274 snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
275 ret_val = snd_pcm_hw_constraint_integer(runtime,
276 SNDRV_PCM_HW_PARAM_PERIODS);
277 if (ret_val < 0)
278 return ret_val;
279
280 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
281 if (!stream)
282 return -ENOMEM;
283 spin_lock_init(&stream->status_lock);
284
285 /* get the sst ops */
286 mutex_lock(&sst_lock);
287 if (!sst) {
288 pr_err("no device available to run\n");
289 mutex_unlock(&sst_lock);
290 kfree(stream);
291 return -ENODEV;
292 }
293 if (!try_module_get(sst->dev->driver->owner)) {
294 mutex_unlock(&sst_lock);
295 kfree(stream);
296 return -ENODEV;
297 }
298 stream->ops = sst->ops;
299 mutex_unlock(&sst_lock);
300
301 stream->stream_info.str_id = 0;
302 sst_set_stream_status(stream, SST_PLATFORM_INIT);
303 stream->stream_info.mad_substream = substream;
304 /* allocate memory for SST API set */
305 runtime->private_data = stream;
306
307 return 0;
308 }
309
sst_platform_close(struct snd_pcm_substream * substream)310 static int sst_platform_close(struct snd_pcm_substream *substream)
311 {
312 struct sst_runtime_stream *stream;
313 int ret_val = 0, str_id;
314
315 pr_debug("sst_platform_close called\n");
316 stream = substream->runtime->private_data;
317 str_id = stream->stream_info.str_id;
318 if (str_id)
319 ret_val = stream->ops->close(str_id);
320 module_put(sst->dev->driver->owner);
321 kfree(stream);
322 return ret_val;
323 }
324
sst_platform_pcm_prepare(struct snd_pcm_substream * substream)325 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
326 {
327 struct sst_runtime_stream *stream;
328 int ret_val = 0, str_id;
329
330 pr_debug("sst_platform_pcm_prepare called\n");
331 stream = substream->runtime->private_data;
332 str_id = stream->stream_info.str_id;
333 if (stream->stream_info.str_id) {
334 ret_val = stream->ops->device_control(
335 SST_SND_DROP, &str_id);
336 return ret_val;
337 }
338
339 ret_val = sst_platform_alloc_stream(substream);
340 if (ret_val < 0)
341 return ret_val;
342 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
343 "%d", stream->stream_info.str_id);
344
345 ret_val = sst_platform_init_stream(substream);
346 if (ret_val)
347 return ret_val;
348 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
349 return ret_val;
350 }
351
sst_platform_pcm_trigger(struct snd_pcm_substream * substream,int cmd)352 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
353 int cmd)
354 {
355 int ret_val = 0, str_id;
356 struct sst_runtime_stream *stream;
357 int str_cmd, status;
358
359 pr_debug("sst_platform_pcm_trigger called\n");
360 stream = substream->runtime->private_data;
361 str_id = stream->stream_info.str_id;
362 switch (cmd) {
363 case SNDRV_PCM_TRIGGER_START:
364 pr_debug("sst: Trigger Start\n");
365 str_cmd = SST_SND_START;
366 status = SST_PLATFORM_RUNNING;
367 stream->stream_info.mad_substream = substream;
368 break;
369 case SNDRV_PCM_TRIGGER_STOP:
370 pr_debug("sst: in stop\n");
371 str_cmd = SST_SND_DROP;
372 status = SST_PLATFORM_DROPPED;
373 break;
374 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
375 pr_debug("sst: in pause\n");
376 str_cmd = SST_SND_PAUSE;
377 status = SST_PLATFORM_PAUSED;
378 break;
379 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
380 pr_debug("sst: in pause release\n");
381 str_cmd = SST_SND_RESUME;
382 status = SST_PLATFORM_RUNNING;
383 break;
384 default:
385 return -EINVAL;
386 }
387 ret_val = stream->ops->device_control(str_cmd, &str_id);
388 if (!ret_val)
389 sst_set_stream_status(stream, status);
390
391 return ret_val;
392 }
393
394
sst_platform_pcm_pointer(struct snd_pcm_substream * substream)395 static snd_pcm_uframes_t sst_platform_pcm_pointer
396 (struct snd_pcm_substream *substream)
397 {
398 struct sst_runtime_stream *stream;
399 int ret_val, status;
400 struct pcm_stream_info *str_info;
401
402 stream = substream->runtime->private_data;
403 status = sst_get_stream_status(stream);
404 if (status == SST_PLATFORM_INIT)
405 return 0;
406 str_info = &stream->stream_info;
407 ret_val = stream->ops->device_control(
408 SST_SND_BUFFER_POINTER, str_info);
409 if (ret_val) {
410 pr_err("sst: error code = %d\n", ret_val);
411 return ret_val;
412 }
413 return stream->stream_info.buffer_ptr;
414 }
415
sst_platform_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)416 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
417 struct snd_pcm_hw_params *params)
418 {
419 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
420 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
421
422 return 0;
423 }
424
sst_platform_pcm_hw_free(struct snd_pcm_substream * substream)425 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
426 {
427 return snd_pcm_lib_free_pages(substream);
428 }
429
430 static struct snd_pcm_ops sst_platform_ops = {
431 .open = sst_platform_open,
432 .close = sst_platform_close,
433 .ioctl = snd_pcm_lib_ioctl,
434 .prepare = sst_platform_pcm_prepare,
435 .trigger = sst_platform_pcm_trigger,
436 .pointer = sst_platform_pcm_pointer,
437 .hw_params = sst_platform_pcm_hw_params,
438 .hw_free = sst_platform_pcm_hw_free,
439 };
440
sst_pcm_free(struct snd_pcm * pcm)441 static void sst_pcm_free(struct snd_pcm *pcm)
442 {
443 pr_debug("sst_pcm_free called\n");
444 snd_pcm_lib_preallocate_free_for_all(pcm);
445 }
446
sst_pcm_new(struct snd_soc_pcm_runtime * rtd)447 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
448 {
449 struct snd_pcm *pcm = rtd->pcm;
450 int retval = 0;
451
452 pr_debug("sst_pcm_new called\n");
453 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
454 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
455 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
456 SNDRV_DMA_TYPE_CONTINUOUS,
457 snd_dma_continuous_data(GFP_KERNEL),
458 SST_MIN_BUFFER, SST_MAX_BUFFER);
459 if (retval) {
460 pr_err("dma buffer allocationf fail\n");
461 return retval;
462 }
463 }
464 return retval;
465 }
466 static struct snd_soc_platform_driver sst_soc_platform_drv = {
467 .ops = &sst_platform_ops,
468 .pcm_new = sst_pcm_new,
469 .pcm_free = sst_pcm_free,
470 };
471
sst_platform_probe(struct platform_device * pdev)472 static int sst_platform_probe(struct platform_device *pdev)
473 {
474 int ret;
475
476 pr_debug("sst_platform_probe called\n");
477 sst = NULL;
478 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
479 if (ret) {
480 pr_err("registering soc platform failed\n");
481 return ret;
482 }
483
484 ret = snd_soc_register_dais(&pdev->dev,
485 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
486 if (ret) {
487 pr_err("registering cpu dais failed\n");
488 snd_soc_unregister_platform(&pdev->dev);
489 }
490 return ret;
491 }
492
sst_platform_remove(struct platform_device * pdev)493 static int sst_platform_remove(struct platform_device *pdev)
494 {
495
496 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
497 snd_soc_unregister_platform(&pdev->dev);
498 pr_debug("sst_platform_remove success\n");
499 return 0;
500 }
501
502 static struct platform_driver sst_platform_driver = {
503 .driver = {
504 .name = "sst-platform",
505 .owner = THIS_MODULE,
506 },
507 .probe = sst_platform_probe,
508 .remove = sst_platform_remove,
509 };
510
511 module_platform_driver(sst_platform_driver);
512
513 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
514 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
515 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
516 MODULE_LICENSE("GPL v2");
517 MODULE_ALIAS("platform:sst-platform");
518