2 * sst_platform.c - Intel MID Platform driver
4 * Copyright (C) 2010 Intel Corp
5 * Author: Vinod Koul <vinod.koul@intel.com>
6 * Author: Harsha Priya <priya.harsha@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28 #include <linux/slab.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"
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 |
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,
66 struct snd_soc_dai_driver sst_platform_dai[] = {
68 .name = "Headset-cpu-dai",
71 .channels_min = SST_STEREO,
72 .channels_max = SST_STEREO,
73 .rates = SNDRV_PCM_RATE_48000,
74 .formats = SNDRV_PCM_FMTBIT_S24_LE,
79 .rates = SNDRV_PCM_RATE_48000,
80 .formats = SNDRV_PCM_FMTBIT_S24_LE,
84 .name = "Speaker-cpu-dai",
87 .channels_min = SST_MONO,
88 .channels_max = SST_STEREO,
89 .rates = SNDRV_PCM_RATE_48000,
90 .formats = SNDRV_PCM_FMTBIT_S24_LE,
94 .name = "Vibra1-cpu-dai",
97 .channels_min = SST_MONO,
98 .channels_max = SST_MONO,
99 .rates = SNDRV_PCM_RATE_48000,
100 .formats = SNDRV_PCM_FMTBIT_S24_LE,
104 .name = "Vibra2-cpu-dai",
107 .channels_min = SST_MONO,
108 .channels_max = SST_STEREO,
109 .rates = SNDRV_PCM_RATE_48000,
110 .formats = SNDRV_PCM_FMTBIT_S24_LE,
115 /* helper functions */
116 static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
120 spin_lock_irqsave(&stream->status_lock, flags);
121 stream->stream_status = state;
122 spin_unlock_irqrestore(&stream->status_lock, flags);
125 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
130 spin_lock_irqsave(&stream->status_lock, flags);
131 state = stream->stream_status;
132 spin_unlock_irqrestore(&stream->status_lock, flags);
136 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
137 struct snd_sst_stream_params *param)
140 param->uc.pcm_params.codec = SST_CODEC_TYPE_PCM;
141 param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
142 param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
143 param->uc.pcm_params.reserved = 0;
144 param->uc.pcm_params.sfreq = substream->runtime->rate;
145 param->uc.pcm_params.ring_buffer_size =
146 snd_pcm_lib_buffer_bytes(substream);
147 param->uc.pcm_params.period_count = substream->runtime->period_size;
148 param->uc.pcm_params.ring_buffer_addr =
149 virt_to_phys(substream->dma_buffer.area);
150 pr_debug("period_cnt = %d\n", param->uc.pcm_params.period_count);
151 pr_debug("sfreq= %d, wd_sz = %d\n",
152 param->uc.pcm_params.sfreq, param->uc.pcm_params.pcm_wd_sz);
155 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
157 struct sst_runtime_stream *stream =
158 substream->runtime->private_data;
159 struct snd_sst_stream_params param = {{{0,},},};
160 struct snd_sst_params str_params = {0};
163 /* set codec params and inform SST driver the same */
164 sst_fill_pcm_params(substream, ¶m);
165 substream->runtime->dma_area = substream->dma_buffer.area;
166 str_params.sparams = param;
167 str_params.codec = param.uc.pcm_params.codec;
168 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
169 str_params.ops = STREAM_OPS_PLAYBACK;
170 str_params.device_type = substream->pcm->device + 1;
171 pr_debug("Playbck stream,Device %d\n",
172 substream->pcm->device);
174 str_params.ops = STREAM_OPS_CAPTURE;
175 str_params.device_type = SND_SST_DEVICE_CAPTURE;
176 pr_debug("Capture stream,Device %d\n",
177 substream->pcm->device);
179 ret_val = stream->sstdrv_ops->pcm_control->open(&str_params);
180 pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
184 stream->stream_info.str_id = ret_val;
185 pr_debug("str id : %d\n", stream->stream_info.str_id);
189 static void sst_period_elapsed(void *mad_substream)
191 struct snd_pcm_substream *substream = mad_substream;
192 struct sst_runtime_stream *stream;
195 if (!substream || !substream->runtime)
197 stream = substream->runtime->private_data;
200 status = sst_get_stream_status(stream);
201 if (status != SST_PLATFORM_RUNNING)
203 snd_pcm_period_elapsed(substream);
206 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
208 struct sst_runtime_stream *stream =
209 substream->runtime->private_data;
212 pr_debug("setting buffer ptr param\n");
213 sst_set_stream_status(stream, SST_PLATFORM_INIT);
214 stream->stream_info.period_elapsed = sst_period_elapsed;
215 stream->stream_info.mad_substream = substream;
216 stream->stream_info.buffer_ptr = 0;
217 stream->stream_info.sfreq = substream->runtime->rate;
218 ret_val = stream->sstdrv_ops->pcm_control->device_control(
219 SST_SND_STREAM_INIT, &stream->stream_info);
221 pr_err("control_set ret error %d\n", ret_val);
225 /* end -- helper functions */
227 static int sst_platform_open(struct snd_pcm_substream *substream)
229 struct snd_pcm_runtime *runtime;
230 struct sst_runtime_stream *stream;
233 pr_debug("sst_platform_open called\n");
234 runtime = substream->runtime;
235 runtime->hw = sst_platform_pcm_hw;
236 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
239 spin_lock_init(&stream->status_lock);
240 stream->stream_info.str_id = 0;
241 sst_set_stream_status(stream, SST_PLATFORM_INIT);
242 stream->stream_info.mad_substream = substream;
243 /* allocate memory for SST API set */
244 stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops),
246 if (!stream->sstdrv_ops) {
247 pr_err("sst: mem allocation for ops fail\n");
251 stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
252 /* registering with SST driver to get access to SST APIs to use */
253 ret_val = register_sst_card(stream->sstdrv_ops);
255 pr_err("sst: sst card registration failed\n");
258 runtime->private_data = stream;
259 return snd_pcm_hw_constraint_integer(runtime,
260 SNDRV_PCM_HW_PARAM_PERIODS);
263 static int sst_platform_close(struct snd_pcm_substream *substream)
265 struct sst_runtime_stream *stream;
266 int ret_val = 0, str_id;
268 pr_debug("sst_platform_close called\n");
269 stream = substream->runtime->private_data;
270 str_id = stream->stream_info.str_id;
272 ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
273 kfree(stream->sstdrv_ops);
278 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
280 struct sst_runtime_stream *stream;
281 int ret_val = 0, str_id;
283 pr_debug("sst_platform_pcm_prepare called\n");
284 stream = substream->runtime->private_data;
285 str_id = stream->stream_info.str_id;
286 if (stream->stream_info.str_id) {
287 ret_val = stream->sstdrv_ops->pcm_control->device_control(
288 SST_SND_DROP, &str_id);
292 ret_val = sst_platform_alloc_stream(substream);
295 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
296 "%d", stream->stream_info.str_id);
298 ret_val = sst_platform_init_stream(substream);
301 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
305 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
308 int ret_val = 0, str_id;
309 struct sst_runtime_stream *stream;
312 pr_debug("sst_platform_pcm_trigger called\n");
313 stream = substream->runtime->private_data;
314 str_id = stream->stream_info.str_id;
316 case SNDRV_PCM_TRIGGER_START:
317 pr_debug("sst: Trigger Start\n");
318 str_cmd = SST_SND_START;
319 status = SST_PLATFORM_RUNNING;
320 stream->stream_info.mad_substream = substream;
322 case SNDRV_PCM_TRIGGER_STOP:
323 pr_debug("sst: in stop\n");
324 str_cmd = SST_SND_DROP;
325 status = SST_PLATFORM_DROPPED;
327 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
328 pr_debug("sst: in pause\n");
329 str_cmd = SST_SND_PAUSE;
330 status = SST_PLATFORM_PAUSED;
332 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
333 pr_debug("sst: in pause release\n");
334 str_cmd = SST_SND_RESUME;
335 status = SST_PLATFORM_RUNNING;
340 ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd,
343 sst_set_stream_status(stream, status);
349 static snd_pcm_uframes_t sst_platform_pcm_pointer
350 (struct snd_pcm_substream *substream)
352 struct sst_runtime_stream *stream;
354 struct pcm_stream_info *str_info;
356 stream = substream->runtime->private_data;
357 status = sst_get_stream_status(stream);
358 if (status == SST_PLATFORM_INIT)
360 str_info = &stream->stream_info;
361 ret_val = stream->sstdrv_ops->pcm_control->device_control(
362 SST_SND_BUFFER_POINTER, str_info);
364 pr_err("sst: error code = %d\n", ret_val);
367 return stream->stream_info.buffer_ptr;
370 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
371 struct snd_pcm_hw_params *params)
373 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
374 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
379 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
381 return snd_pcm_lib_free_pages(substream);
384 static struct snd_pcm_ops sst_platform_ops = {
385 .open = sst_platform_open,
386 .close = sst_platform_close,
387 .ioctl = snd_pcm_lib_ioctl,
388 .prepare = sst_platform_pcm_prepare,
389 .trigger = sst_platform_pcm_trigger,
390 .pointer = sst_platform_pcm_pointer,
391 .hw_params = sst_platform_pcm_hw_params,
392 .hw_free = sst_platform_pcm_hw_free,
395 static void sst_pcm_free(struct snd_pcm *pcm)
397 pr_debug("sst_pcm_free called\n");
398 snd_pcm_lib_preallocate_free_for_all(pcm);
401 int sst_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
406 pr_debug("sst_pcm_new called\n");
407 if (dai->driver->playback.channels_min ||
408 dai->driver->capture.channels_min) {
409 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
410 SNDRV_DMA_TYPE_CONTINUOUS,
411 snd_dma_continuous_data(GFP_KERNEL),
412 SST_MIN_BUFFER, SST_MAX_BUFFER);
414 pr_err("dma buffer allocationf fail\n");
420 struct snd_soc_platform_driver sst_soc_platform_drv = {
421 .ops = &sst_platform_ops,
422 .pcm_new = sst_pcm_new,
423 .pcm_free = sst_pcm_free,
426 static int sst_platform_probe(struct platform_device *pdev)
430 pr_debug("sst_platform_probe called\n");
431 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
433 pr_err("registering soc platform failed\n");
437 ret = snd_soc_register_dais(&pdev->dev,
438 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
440 pr_err("registering cpu dais failed\n");
441 snd_soc_unregister_platform(&pdev->dev);
446 static int sst_platform_remove(struct platform_device *pdev)
449 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
450 snd_soc_unregister_platform(&pdev->dev);
451 pr_debug("sst_platform_remove success\n");
455 static struct platform_driver sst_platform_driver = {
457 .name = "sst-platform",
458 .owner = THIS_MODULE,
460 .probe = sst_platform_probe,
461 .remove = sst_platform_remove,
464 static int __init sst_soc_platform_init(void)
466 pr_debug("sst_soc_platform_init called\n");
467 return platform_driver_register(&sst_platform_driver);
469 module_init(sst_soc_platform_init);
471 static void __exit sst_soc_platform_exit(void)
473 platform_driver_unregister(&sst_platform_driver);
474 pr_debug("sst_soc_platform_exit success\n");
476 module_exit(sst_soc_platform_exit);
478 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
479 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
480 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
481 MODULE_LICENSE("GPL v2");
482 MODULE_ALIAS("platform:sst-platform");