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,
119 spin_lock(&stream->status_lock);
120 stream->stream_status = state;
121 spin_unlock(&stream->status_lock);
124 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
128 spin_lock(&stream->status_lock);
129 state = stream->stream_status;
130 spin_unlock(&stream->status_lock);
134 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
135 struct snd_sst_stream_params *param)
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);
153 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
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};
161 /* set codec params and inform SST driver the same */
162 sst_fill_pcm_params(substream, ¶m);
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);
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);
177 ret_val = stream->sstdrv_ops->pcm_control->open(&str_params);
178 pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
182 stream->stream_info.str_id = ret_val;
183 pr_debug("str id : %d\n", stream->stream_info.str_id);
187 static void sst_period_elapsed(void *mad_substream)
189 struct snd_pcm_substream *substream = mad_substream;
190 struct sst_runtime_stream *stream;
193 if (!substream || !substream->runtime)
195 stream = substream->runtime->private_data;
198 status = sst_get_stream_status(stream);
199 if (status != SST_PLATFORM_RUNNING)
201 snd_pcm_period_elapsed(substream);
204 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
206 struct sst_runtime_stream *stream =
207 substream->runtime->private_data;
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);
219 pr_err("control_set ret error %d\n", ret_val);
223 /* end -- helper functions */
225 static int sst_platform_open(struct snd_pcm_substream *substream)
227 struct snd_pcm_runtime *runtime;
228 struct sst_runtime_stream *stream;
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);
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),
244 if (!stream->sstdrv_ops) {
245 pr_err("sst: mem allocation for ops fail\n");
249 stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
250 stream->sstdrv_ops->module_name = SST_CARD_NAMES;
251 /* registering with SST driver to get access to SST APIs to use */
252 ret_val = register_sst_card(stream->sstdrv_ops);
254 pr_err("sst: sst card registration failed\n");
255 kfree(stream->sstdrv_ops);
259 runtime->private_data = stream;
260 return snd_pcm_hw_constraint_integer(runtime,
261 SNDRV_PCM_HW_PARAM_PERIODS);
264 static int sst_platform_close(struct snd_pcm_substream *substream)
266 struct sst_runtime_stream *stream;
267 int ret_val = 0, str_id;
269 pr_debug("sst_platform_close called\n");
270 stream = substream->runtime->private_data;
271 str_id = stream->stream_info.str_id;
273 ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
274 kfree(stream->sstdrv_ops);
279 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
281 struct sst_runtime_stream *stream;
282 int ret_val = 0, str_id;
284 pr_debug("sst_platform_pcm_prepare called\n");
285 stream = substream->runtime->private_data;
286 str_id = stream->stream_info.str_id;
287 if (stream->stream_info.str_id) {
288 ret_val = stream->sstdrv_ops->pcm_control->device_control(
289 SST_SND_DROP, &str_id);
293 ret_val = sst_platform_alloc_stream(substream);
296 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
297 "%d", stream->stream_info.str_id);
299 ret_val = sst_platform_init_stream(substream);
302 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
306 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
309 int ret_val = 0, str_id;
310 struct sst_runtime_stream *stream;
313 pr_debug("sst_platform_pcm_trigger called\n");
314 stream = substream->runtime->private_data;
315 str_id = stream->stream_info.str_id;
317 case SNDRV_PCM_TRIGGER_START:
318 pr_debug("sst: Trigger Start\n");
319 str_cmd = SST_SND_START;
320 status = SST_PLATFORM_RUNNING;
321 stream->stream_info.mad_substream = substream;
323 case SNDRV_PCM_TRIGGER_STOP:
324 pr_debug("sst: in stop\n");
325 str_cmd = SST_SND_DROP;
326 status = SST_PLATFORM_DROPPED;
328 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
329 pr_debug("sst: in pause\n");
330 str_cmd = SST_SND_PAUSE;
331 status = SST_PLATFORM_PAUSED;
333 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
334 pr_debug("sst: in pause release\n");
335 str_cmd = SST_SND_RESUME;
336 status = SST_PLATFORM_RUNNING;
341 ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd,
344 sst_set_stream_status(stream, status);
350 static snd_pcm_uframes_t sst_platform_pcm_pointer
351 (struct snd_pcm_substream *substream)
353 struct sst_runtime_stream *stream;
355 struct pcm_stream_info *str_info;
357 stream = substream->runtime->private_data;
358 status = sst_get_stream_status(stream);
359 if (status == SST_PLATFORM_INIT)
361 str_info = &stream->stream_info;
362 ret_val = stream->sstdrv_ops->pcm_control->device_control(
363 SST_SND_BUFFER_POINTER, str_info);
365 pr_err("sst: error code = %d\n", ret_val);
368 return stream->stream_info.buffer_ptr;
371 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
372 struct snd_pcm_hw_params *params)
374 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
375 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
380 static struct snd_pcm_ops sst_platform_ops = {
381 .open = sst_platform_open,
382 .close = sst_platform_close,
383 .ioctl = snd_pcm_lib_ioctl,
384 .prepare = sst_platform_pcm_prepare,
385 .trigger = sst_platform_pcm_trigger,
386 .pointer = sst_platform_pcm_pointer,
387 .hw_params = sst_platform_pcm_hw_params,
390 static void sst_pcm_free(struct snd_pcm *pcm)
392 pr_debug("sst_pcm_free called\n");
393 snd_pcm_lib_preallocate_free_for_all(pcm);
396 int sst_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
401 pr_debug("sst_pcm_new called\n");
402 if (dai->driver->playback.channels_min ||
403 dai->driver->capture.channels_min) {
404 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
405 SNDRV_DMA_TYPE_CONTINUOUS,
406 snd_dma_continuous_data(GFP_KERNEL),
407 SST_MIN_BUFFER, SST_MAX_BUFFER);
409 pr_err("dma buffer allocationf fail\n");
415 struct snd_soc_platform_driver sst_soc_platform_drv = {
416 .ops = &sst_platform_ops,
417 .pcm_new = sst_pcm_new,
418 .pcm_free = sst_pcm_free,
421 static int sst_platform_probe(struct platform_device *pdev)
425 pr_debug("sst_platform_probe called\n");
426 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
428 pr_err("registering soc platform failed\n");
432 ret = snd_soc_register_dais(&pdev->dev,
433 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
435 pr_err("registering cpu dais failed\n");
436 snd_soc_unregister_platform(&pdev->dev);
441 static int sst_platform_remove(struct platform_device *pdev)
444 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
445 snd_soc_unregister_platform(&pdev->dev);
446 pr_debug("sst_platform_remove sucess\n");
450 static struct platform_driver sst_platform_driver = {
452 .name = "sst-platform",
453 .owner = THIS_MODULE,
455 .probe = sst_platform_probe,
456 .remove = sst_platform_remove,
459 static int __init sst_soc_platform_init(void)
461 pr_debug("sst_soc_platform_init called\n");
462 return platform_driver_register(&sst_platform_driver);
464 module_init(sst_soc_platform_init);
466 static void __exit sst_soc_platform_exit(void)
468 platform_driver_unregister(&sst_platform_driver);
469 pr_debug("sst_soc_platform_exit sucess\n");
471 module_exit(sst_soc_platform_exit);
473 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
474 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
475 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
476 MODULE_LICENSE("GPL v2");
477 MODULE_ALIAS("platform:sst-platform");