b2e9198a983a01115fe31c6e32570d31c0fb3aaa
[pandora-kernel.git] / sound / soc / mid-x86 / sst_platform.c
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 <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/soc.h>
34 #include "../../../drivers/staging/intel_sst/intel_sst_ioctl.h"
35 #include "../../../drivers/staging/intel_sst/intel_sst.h"
36 #include "sst_platform.h"
37
38 static struct snd_pcm_hardware sst_platform_pcm_hw = {
39         .info = (SNDRV_PCM_INFO_INTERLEAVED |
40                         SNDRV_PCM_INFO_DOUBLE |
41                         SNDRV_PCM_INFO_PAUSE |
42                         SNDRV_PCM_INFO_RESUME |
43                         SNDRV_PCM_INFO_MMAP|
44                         SNDRV_PCM_INFO_MMAP_VALID |
45                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
46                         SNDRV_PCM_INFO_SYNC_START),
47         .formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 |
48                         SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 |
49                         SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32),
50         .rates = (SNDRV_PCM_RATE_8000|
51                         SNDRV_PCM_RATE_44100 |
52                         SNDRV_PCM_RATE_48000),
53         .rate_min = SST_MIN_RATE,
54         .rate_max = SST_MAX_RATE,
55         .channels_min = SST_MIN_CHANNEL,
56         .channels_max = SST_MAX_CHANNEL,
57         .buffer_bytes_max = SST_MAX_BUFFER,
58         .period_bytes_min = SST_MIN_PERIOD_BYTES,
59         .period_bytes_max = SST_MAX_PERIOD_BYTES,
60         .periods_min = SST_MIN_PERIODS,
61         .periods_max = SST_MAX_PERIODS,
62         .fifo_size = SST_FIFO_SIZE,
63 };
64
65 /* MFLD - MSIC */
66 struct snd_soc_dai_driver sst_platform_dai[] = {
67 {
68         .name = "Headset-cpu-dai",
69         .id = 0,
70         .playback = {
71                 .channels_min = SST_STEREO,
72                 .channels_max = SST_STEREO,
73                 .rates = SNDRV_PCM_RATE_48000,
74                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
75         },
76         .capture = {
77                 .channels_min = 1,
78                 .channels_max = 5,
79                 .rates = SNDRV_PCM_RATE_48000,
80                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
81         },
82 },
83 {
84         .name = "Speaker-cpu-dai",
85         .id = 1,
86         .playback = {
87                 .channels_min = SST_MONO,
88                 .channels_max = SST_STEREO,
89                 .rates = SNDRV_PCM_RATE_48000,
90                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
91         },
92 },
93 {
94         .name = "Vibra1-cpu-dai",
95         .id = 2,
96         .playback = {
97                 .channels_min = SST_MONO,
98                 .channels_max = SST_MONO,
99                 .rates = SNDRV_PCM_RATE_48000,
100                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
101         },
102 },
103 {
104         .name = "Vibra2-cpu-dai",
105         .id = 3,
106         .playback = {
107                 .channels_min = SST_MONO,
108                 .channels_max = SST_STEREO,
109                 .rates = SNDRV_PCM_RATE_48000,
110                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
111         },
112 },
113 };
114
115 /* helper functions */
116 static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
117                                         int state)
118 {
119         spin_lock(&stream->status_lock);
120         stream->stream_status = state;
121         spin_unlock(&stream->status_lock);
122 }
123
124 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
125 {
126         int state;
127
128         spin_lock(&stream->status_lock);
129         state = stream->stream_status;
130         spin_unlock(&stream->status_lock);
131         return state;
132 }
133
134 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
135                                 struct snd_sst_stream_params *param)
136 {
137
138         param->uc.pcm_params.codec = SST_CODEC_TYPE_PCM;
139         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
140         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
141         param->uc.pcm_params.reserved = 0;
142         param->uc.pcm_params.sfreq = substream->runtime->rate;
143         param->uc.pcm_params.ring_buffer_size =
144                                         snd_pcm_lib_buffer_bytes(substream);
145         param->uc.pcm_params.period_count = substream->runtime->period_size;
146         param->uc.pcm_params.ring_buffer_addr =
147                                 virt_to_phys(substream->dma_buffer.area);
148         pr_debug("period_cnt = %d\n", param->uc.pcm_params.period_count);
149         pr_debug("sfreq= %d, wd_sz = %d\n",
150                  param->uc.pcm_params.sfreq, param->uc.pcm_params.pcm_wd_sz);
151 }
152
153 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
154 {
155         struct sst_runtime_stream *stream =
156                         substream->runtime->private_data;
157         struct snd_sst_stream_params param = {{{0,},},};
158         struct snd_sst_params str_params = {0};
159         int ret_val;
160
161         /* set codec params and inform SST driver the same */
162         sst_fill_pcm_params(substream, &param);
163         substream->runtime->dma_area = substream->dma_buffer.area;
164         str_params.sparams = param;
165         str_params.codec =  param.uc.pcm_params.codec;
166         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
167                 str_params.ops = STREAM_OPS_PLAYBACK;
168                 str_params.device_type = substream->pcm->device + 1;
169                 pr_debug("Playbck stream,Device %d\n",
170                                         substream->pcm->device);
171         } else {
172                 str_params.ops = STREAM_OPS_CAPTURE;
173                 str_params.device_type = SND_SST_DEVICE_CAPTURE;
174                 pr_debug("Capture stream,Device %d\n",
175                                         substream->pcm->device);
176         }
177         ret_val = stream->sstdrv_ops->pcm_control->open(&str_params);
178         pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
179         if (ret_val < 0)
180                 return ret_val;
181
182         stream->stream_info.str_id = ret_val;
183         pr_debug("str id :  %d\n", stream->stream_info.str_id);
184         return ret_val;
185 }
186
187 static void sst_period_elapsed(void *mad_substream)
188 {
189         struct snd_pcm_substream *substream = mad_substream;
190         struct sst_runtime_stream *stream;
191         int status;
192
193         if (!substream || !substream->runtime)
194                 return;
195         stream = substream->runtime->private_data;
196         if (!stream)
197                 return;
198         status = sst_get_stream_status(stream);
199         if (status != SST_PLATFORM_RUNNING)
200                 return;
201         snd_pcm_period_elapsed(substream);
202 }
203
204 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
205 {
206         struct sst_runtime_stream *stream =
207                         substream->runtime->private_data;
208         int ret_val;
209
210         pr_debug("setting buffer ptr param\n");
211         sst_set_stream_status(stream, SST_PLATFORM_INIT);
212         stream->stream_info.period_elapsed = sst_period_elapsed;
213         stream->stream_info.mad_substream = substream;
214         stream->stream_info.buffer_ptr = 0;
215         stream->stream_info.sfreq = substream->runtime->rate;
216         ret_val = stream->sstdrv_ops->pcm_control->device_control(
217                         SST_SND_STREAM_INIT, &stream->stream_info);
218         if (ret_val)
219                 pr_err("control_set ret error %d\n", ret_val);
220         return ret_val;
221
222 }
223 /* end -- helper functions */
224
225 static int sst_platform_open(struct snd_pcm_substream *substream)
226 {
227         struct snd_pcm_runtime *runtime;
228         struct sst_runtime_stream *stream;
229         int ret_val = 0;
230
231         pr_debug("sst_platform_open called\n");
232         runtime = substream->runtime;
233         runtime->hw = sst_platform_pcm_hw;
234         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
235         if (!stream)
236                 return -ENOMEM;
237         spin_lock_init(&stream->status_lock);
238         stream->stream_info.str_id = 0;
239         sst_set_stream_status(stream, SST_PLATFORM_INIT);
240         stream->stream_info.mad_substream = substream;
241         /* allocate memory for SST API set */
242         stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops),
243                                                         GFP_KERNEL);
244         if (!stream->sstdrv_ops) {
245                 pr_err("sst: mem allocation for ops fail\n");
246                 kfree(stream);
247                 return -ENOMEM;
248         }
249         stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
250         /* registering with SST driver to get access to SST APIs to use */
251         ret_val = register_sst_card(stream->sstdrv_ops);
252         if (ret_val) {
253                 pr_err("sst: sst card registration failed\n");
254                 return ret_val;
255         }
256         runtime->private_data = stream;
257         return snd_pcm_hw_constraint_integer(runtime,
258                          SNDRV_PCM_HW_PARAM_PERIODS);
259 }
260
261 static int sst_platform_close(struct snd_pcm_substream *substream)
262 {
263         struct sst_runtime_stream *stream;
264         int ret_val = 0, str_id;
265
266         pr_debug("sst_platform_close called\n");
267         stream = substream->runtime->private_data;
268         str_id = stream->stream_info.str_id;
269         if (str_id)
270                 ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
271         kfree(stream->sstdrv_ops);
272         kfree(stream);
273         return ret_val;
274 }
275
276 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
277 {
278         struct sst_runtime_stream *stream;
279         int ret_val = 0, str_id;
280
281         pr_debug("sst_platform_pcm_prepare called\n");
282         stream = substream->runtime->private_data;
283         str_id = stream->stream_info.str_id;
284         if (stream->stream_info.str_id) {
285                 ret_val = stream->sstdrv_ops->pcm_control->device_control(
286                                         SST_SND_DROP, &str_id);
287                 return ret_val;
288         }
289
290         ret_val = sst_platform_alloc_stream(substream);
291         if (ret_val < 0)
292                 return ret_val;
293         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
294                         "%d", stream->stream_info.str_id);
295
296         ret_val = sst_platform_init_stream(substream);
297         if (ret_val)
298                 return ret_val;
299         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
300         return ret_val;
301 }
302
303 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
304                                         int cmd)
305 {
306         int ret_val = 0, str_id;
307         struct sst_runtime_stream *stream;
308         int str_cmd, status;
309
310         pr_debug("sst_platform_pcm_trigger called\n");
311         stream = substream->runtime->private_data;
312         str_id = stream->stream_info.str_id;
313         switch (cmd) {
314         case SNDRV_PCM_TRIGGER_START:
315                 pr_debug("sst: Trigger Start\n");
316                 str_cmd = SST_SND_START;
317                 status = SST_PLATFORM_RUNNING;
318                 stream->stream_info.mad_substream = substream;
319                 break;
320         case SNDRV_PCM_TRIGGER_STOP:
321                 pr_debug("sst: in stop\n");
322                 str_cmd = SST_SND_DROP;
323                 status = SST_PLATFORM_DROPPED;
324                 break;
325         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
326                 pr_debug("sst: in pause\n");
327                 str_cmd = SST_SND_PAUSE;
328                 status = SST_PLATFORM_PAUSED;
329                 break;
330         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
331                 pr_debug("sst: in pause release\n");
332                 str_cmd = SST_SND_RESUME;
333                 status = SST_PLATFORM_RUNNING;
334                 break;
335         default:
336                 return -EINVAL;
337         }
338         ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd,
339                                                                 &str_id);
340         if (!ret_val)
341                 sst_set_stream_status(stream, status);
342
343         return ret_val;
344 }
345
346
347 static snd_pcm_uframes_t sst_platform_pcm_pointer
348                         (struct snd_pcm_substream *substream)
349 {
350         struct sst_runtime_stream *stream;
351         int ret_val, status;
352         struct pcm_stream_info *str_info;
353
354         stream = substream->runtime->private_data;
355         status = sst_get_stream_status(stream);
356         if (status == SST_PLATFORM_INIT)
357                 return 0;
358         str_info = &stream->stream_info;
359         ret_val = stream->sstdrv_ops->pcm_control->device_control(
360                                 SST_SND_BUFFER_POINTER, str_info);
361         if (ret_val) {
362                 pr_err("sst: error code = %d\n", ret_val);
363                 return ret_val;
364         }
365         return stream->stream_info.buffer_ptr;
366 }
367
368 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
369                 struct snd_pcm_hw_params *params)
370 {
371         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
372         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
373
374         return 0;
375 }
376
377 static struct snd_pcm_ops sst_platform_ops = {
378         .open = sst_platform_open,
379         .close = sst_platform_close,
380         .ioctl = snd_pcm_lib_ioctl,
381         .prepare = sst_platform_pcm_prepare,
382         .trigger = sst_platform_pcm_trigger,
383         .pointer = sst_platform_pcm_pointer,
384         .hw_params = sst_platform_pcm_hw_params,
385 };
386
387 static void sst_pcm_free(struct snd_pcm *pcm)
388 {
389         pr_debug("sst_pcm_free called\n");
390         snd_pcm_lib_preallocate_free_for_all(pcm);
391 }
392
393 int sst_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
394                         struct snd_pcm *pcm)
395 {
396         int retval = 0;
397
398         pr_debug("sst_pcm_new called\n");
399         if (dai->driver->playback.channels_min ||
400                         dai->driver->capture.channels_min) {
401                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
402                         SNDRV_DMA_TYPE_CONTINUOUS,
403                         snd_dma_continuous_data(GFP_KERNEL),
404                         SST_MIN_BUFFER, SST_MAX_BUFFER);
405                 if (retval) {
406                         pr_err("dma buffer allocationf fail\n");
407                         return retval;
408                 }
409         }
410         return retval;
411 }
412 struct snd_soc_platform_driver sst_soc_platform_drv = {
413         .ops            = &sst_platform_ops,
414         .pcm_new        = sst_pcm_new,
415         .pcm_free       = sst_pcm_free,
416 };
417
418 static int sst_platform_probe(struct platform_device *pdev)
419 {
420         int ret;
421
422         pr_debug("sst_platform_probe called\n");
423         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
424         if (ret) {
425                 pr_err("registering soc platform failed\n");
426                 return ret;
427         }
428
429         ret = snd_soc_register_dais(&pdev->dev,
430                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
431         if (ret) {
432                 pr_err("registering cpu dais failed\n");
433                 snd_soc_unregister_platform(&pdev->dev);
434         }
435         return ret;
436 }
437
438 static int sst_platform_remove(struct platform_device *pdev)
439 {
440
441         snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
442         snd_soc_unregister_platform(&pdev->dev);
443         pr_debug("sst_platform_remove success\n");
444         return 0;
445 }
446
447 static struct platform_driver sst_platform_driver = {
448         .driver         = {
449                 .name           = "sst-platform",
450                 .owner          = THIS_MODULE,
451         },
452         .probe          = sst_platform_probe,
453         .remove         = sst_platform_remove,
454 };
455
456 static int __init sst_soc_platform_init(void)
457 {
458         pr_debug("sst_soc_platform_init called\n");
459         return  platform_driver_register(&sst_platform_driver);
460 }
461 module_init(sst_soc_platform_init);
462
463 static void __exit sst_soc_platform_exit(void)
464 {
465         platform_driver_unregister(&sst_platform_driver);
466         pr_debug("sst_soc_platform_exit success\n");
467 }
468 module_exit(sst_soc_platform_exit);
469
470 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
471 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
472 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
473 MODULE_LICENSE("GPL v2");
474 MODULE_ALIAS("platform:sst-platform");