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
= substream
->runtime
;
230 struct sst_runtime_stream
*stream
;
233 pr_debug("sst_platform_open called\n");
235 snd_soc_set_runtime_hwparams(substream
, &sst_platform_pcm_hw
);
237 stream
= kzalloc(sizeof(*stream
), GFP_KERNEL
);
240 spin_lock_init(&stream
->status_lock
);
241 stream
->stream_info
.str_id
= 0;
242 sst_set_stream_status(stream
, SST_PLATFORM_INIT
);
243 stream
->stream_info
.mad_substream
= substream
;
244 /* allocate memory for SST API set */
245 stream
->sstdrv_ops
= kzalloc(sizeof(*stream
->sstdrv_ops
),
247 if (!stream
->sstdrv_ops
) {
248 pr_err("sst: mem allocation for ops fail\n");
252 stream
->sstdrv_ops
->vendor_id
= MSIC_VENDOR_ID
;
253 stream
->sstdrv_ops
->module_name
= SST_CARD_NAMES
;
254 /* registering with SST driver to get access to SST APIs to use */
255 ret_val
= register_sst_card(stream
->sstdrv_ops
);
257 pr_err("sst: sst card registration failed\n");
258 kfree(stream
->sstdrv_ops
);
262 runtime
->private_data
= stream
;
263 return snd_pcm_hw_constraint_integer(runtime
,
264 SNDRV_PCM_HW_PARAM_PERIODS
);
267 static int sst_platform_close(struct snd_pcm_substream
*substream
)
269 struct sst_runtime_stream
*stream
;
270 int ret_val
= 0, str_id
;
272 pr_debug("sst_platform_close called\n");
273 stream
= substream
->runtime
->private_data
;
274 str_id
= stream
->stream_info
.str_id
;
276 ret_val
= stream
->sstdrv_ops
->pcm_control
->close(str_id
);
277 unregister_sst_card(stream
->sstdrv_ops
);
278 kfree(stream
->sstdrv_ops
);
283 static int sst_platform_pcm_prepare(struct snd_pcm_substream
*substream
)
285 struct sst_runtime_stream
*stream
;
286 int ret_val
= 0, str_id
;
288 pr_debug("sst_platform_pcm_prepare called\n");
289 stream
= substream
->runtime
->private_data
;
290 str_id
= stream
->stream_info
.str_id
;
291 if (stream
->stream_info
.str_id
) {
292 ret_val
= stream
->sstdrv_ops
->pcm_control
->device_control(
293 SST_SND_DROP
, &str_id
);
297 ret_val
= sst_platform_alloc_stream(substream
);
300 snprintf(substream
->pcm
->id
, sizeof(substream
->pcm
->id
),
301 "%d", stream
->stream_info
.str_id
);
303 ret_val
= sst_platform_init_stream(substream
);
306 substream
->runtime
->hw
.info
= SNDRV_PCM_INFO_BLOCK_TRANSFER
;
310 static int sst_platform_pcm_trigger(struct snd_pcm_substream
*substream
,
313 int ret_val
= 0, str_id
;
314 struct sst_runtime_stream
*stream
;
317 pr_debug("sst_platform_pcm_trigger called\n");
318 stream
= substream
->runtime
->private_data
;
319 str_id
= stream
->stream_info
.str_id
;
321 case SNDRV_PCM_TRIGGER_START
:
322 pr_debug("sst: Trigger Start\n");
323 str_cmd
= SST_SND_START
;
324 status
= SST_PLATFORM_RUNNING
;
325 stream
->stream_info
.mad_substream
= substream
;
327 case SNDRV_PCM_TRIGGER_STOP
:
328 pr_debug("sst: in stop\n");
329 str_cmd
= SST_SND_DROP
;
330 status
= SST_PLATFORM_DROPPED
;
332 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
333 pr_debug("sst: in pause\n");
334 str_cmd
= SST_SND_PAUSE
;
335 status
= SST_PLATFORM_PAUSED
;
337 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
338 pr_debug("sst: in pause release\n");
339 str_cmd
= SST_SND_RESUME
;
340 status
= SST_PLATFORM_RUNNING
;
345 ret_val
= stream
->sstdrv_ops
->pcm_control
->device_control(str_cmd
,
348 sst_set_stream_status(stream
, status
);
354 static snd_pcm_uframes_t sst_platform_pcm_pointer
355 (struct snd_pcm_substream
*substream
)
357 struct sst_runtime_stream
*stream
;
359 struct pcm_stream_info
*str_info
;
361 stream
= substream
->runtime
->private_data
;
362 status
= sst_get_stream_status(stream
);
363 if (status
== SST_PLATFORM_INIT
)
365 str_info
= &stream
->stream_info
;
366 ret_val
= stream
->sstdrv_ops
->pcm_control
->device_control(
367 SST_SND_BUFFER_POINTER
, str_info
);
369 pr_err("sst: error code = %d\n", ret_val
);
372 return stream
->stream_info
.buffer_ptr
;
375 static int sst_platform_pcm_hw_params(struct snd_pcm_substream
*substream
,
376 struct snd_pcm_hw_params
*params
)
378 snd_pcm_lib_malloc_pages(substream
, params_buffer_bytes(params
));
379 memset(substream
->runtime
->dma_area
, 0, params_buffer_bytes(params
));
384 static int sst_platform_pcm_hw_free(struct snd_pcm_substream
*substream
)
386 return snd_pcm_lib_free_pages(substream
);
389 static struct snd_pcm_ops sst_platform_ops
= {
390 .open
= sst_platform_open
,
391 .close
= sst_platform_close
,
392 .ioctl
= snd_pcm_lib_ioctl
,
393 .prepare
= sst_platform_pcm_prepare
,
394 .trigger
= sst_platform_pcm_trigger
,
395 .pointer
= sst_platform_pcm_pointer
,
396 .hw_params
= sst_platform_pcm_hw_params
,
397 .hw_free
= sst_platform_pcm_hw_free
,
400 static void sst_pcm_free(struct snd_pcm
*pcm
)
402 pr_debug("sst_pcm_free called\n");
403 snd_pcm_lib_preallocate_free_for_all(pcm
);
406 int sst_pcm_new(struct snd_soc_pcm_runtime
*rtd
)
408 struct snd_soc_dai
*dai
= rtd
->cpu_dai
;
409 struct snd_pcm
*pcm
= rtd
->pcm
;
412 pr_debug("sst_pcm_new called\n");
413 if (dai
->driver
->playback
.channels_min
||
414 dai
->driver
->capture
.channels_min
) {
415 retval
= snd_pcm_lib_preallocate_pages_for_all(pcm
,
416 SNDRV_DMA_TYPE_CONTINUOUS
,
417 snd_dma_continuous_data(GFP_KERNEL
),
418 SST_MIN_BUFFER
, SST_MAX_BUFFER
);
420 pr_err("dma buffer allocationf fail\n");
426 struct snd_soc_platform_driver sst_soc_platform_drv
= {
427 .ops
= &sst_platform_ops
,
428 .pcm_new
= sst_pcm_new
,
429 .pcm_free
= sst_pcm_free
,
432 static int sst_platform_probe(struct platform_device
*pdev
)
436 pr_debug("sst_platform_probe called\n");
437 ret
= snd_soc_register_platform(&pdev
->dev
, &sst_soc_platform_drv
);
439 pr_err("registering soc platform failed\n");
443 ret
= snd_soc_register_dais(&pdev
->dev
,
444 sst_platform_dai
, ARRAY_SIZE(sst_platform_dai
));
446 pr_err("registering cpu dais failed\n");
447 snd_soc_unregister_platform(&pdev
->dev
);
452 static int sst_platform_remove(struct platform_device
*pdev
)
455 snd_soc_unregister_dais(&pdev
->dev
, ARRAY_SIZE(sst_platform_dai
));
456 snd_soc_unregister_platform(&pdev
->dev
);
457 pr_debug("sst_platform_remove success\n");
461 static struct platform_driver sst_platform_driver
= {
463 .name
= "sst-platform",
464 .owner
= THIS_MODULE
,
466 .probe
= sst_platform_probe
,
467 .remove
= sst_platform_remove
,
470 static int __init
sst_soc_platform_init(void)
472 pr_debug("sst_soc_platform_init called\n");
473 return platform_driver_register(&sst_platform_driver
);
475 module_init(sst_soc_platform_init
);
477 static void __exit
sst_soc_platform_exit(void)
479 platform_driver_unregister(&sst_platform_driver
);
480 pr_debug("sst_soc_platform_exit success\n");
482 module_exit(sst_soc_platform_exit
);
484 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
485 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
486 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
487 MODULE_LICENSE("GPL v2");
488 MODULE_ALIAS("platform:sst-platform");