1// SPDX-License-Identifier: GPL-2.0-only
2//
3// tegra210_adx.c - Tegra210 ADX driver
4//
5// Copyright (c) 2021-2023 NVIDIA CORPORATION. All rights reserved.
6
7#include <linux/clk.h>
8#include <linux/device.h>
9#include <linux/io.h>
10#include <linux/mod_devicetable.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/pm_runtime.h>
14#include <linux/regmap.h>
15#include <sound/core.h>
16#include <sound/pcm.h>
17#include <sound/pcm_params.h>
18#include <sound/soc.h>
19
20#include "tegra210_adx.h"
21#include "tegra_cif.h"
22
23static const struct reg_default tegra210_adx_reg_defaults[] = {
24 { TEGRA210_ADX_RX_INT_MASK, 0x00000001},
25 { TEGRA210_ADX_RX_CIF_CTRL, 0x00007000},
26 { TEGRA210_ADX_TX_INT_MASK, 0x0000000f },
27 { TEGRA210_ADX_TX1_CIF_CTRL, 0x00007000},
28 { TEGRA210_ADX_TX2_CIF_CTRL, 0x00007000},
29 { TEGRA210_ADX_TX3_CIF_CTRL, 0x00007000},
30 { TEGRA210_ADX_TX4_CIF_CTRL, 0x00007000},
31 { TEGRA210_ADX_CG, 0x1},
32 { TEGRA210_ADX_CFG_RAM_CTRL, 0x00004000},
33};
34
35static void tegra210_adx_write_map_ram(struct tegra210_adx *adx)
36{
37 int i;
38
39 regmap_write(map: adx->regmap, TEGRA210_ADX_CFG_RAM_CTRL,
40 TEGRA210_ADX_CFG_RAM_CTRL_SEQ_ACCESS_EN |
41 TEGRA210_ADX_CFG_RAM_CTRL_ADDR_INIT_EN |
42 TEGRA210_ADX_CFG_RAM_CTRL_RW_WRITE);
43
44 for (i = 0; i < TEGRA210_ADX_RAM_DEPTH; i++)
45 regmap_write(map: adx->regmap, TEGRA210_ADX_CFG_RAM_DATA,
46 val: adx->map[i]);
47
48 regmap_write(map: adx->regmap, TEGRA210_ADX_IN_BYTE_EN0, val: adx->byte_mask[0]);
49 regmap_write(map: adx->regmap, TEGRA210_ADX_IN_BYTE_EN1, val: adx->byte_mask[1]);
50}
51
52static int tegra210_adx_startup(struct snd_pcm_substream *substream,
53 struct snd_soc_dai *dai)
54{
55 struct tegra210_adx *adx = snd_soc_dai_get_drvdata(dai);
56 unsigned int val;
57 int err;
58
59 /* Ensure if ADX status is disabled */
60 err = regmap_read_poll_timeout_atomic(adx->regmap, TEGRA210_ADX_STATUS,
61 val, !(val & 0x1), 10, 10000);
62 if (err < 0) {
63 dev_err(dai->dev, "failed to stop ADX, err = %d\n", err);
64 return err;
65 }
66
67 /*
68 * Soft Reset: Below performs module soft reset which clears
69 * all FSM logic, flushes flow control of FIFO and resets the
70 * state register. It also brings module back to disabled
71 * state (without flushing the data in the pipe).
72 */
73 regmap_update_bits(map: adx->regmap, TEGRA210_ADX_SOFT_RESET,
74 TEGRA210_ADX_SOFT_RESET_SOFT_RESET_MASK,
75 TEGRA210_ADX_SOFT_RESET_SOFT_EN);
76
77 err = regmap_read_poll_timeout(adx->regmap, TEGRA210_ADX_SOFT_RESET,
78 val, !(val & 0x1), 10, 10000);
79 if (err < 0) {
80 dev_err(dai->dev, "failed to reset ADX, err = %d\n", err);
81 return err;
82 }
83
84 return 0;
85}
86
87static int __maybe_unused tegra210_adx_runtime_suspend(struct device *dev)
88{
89 struct tegra210_adx *adx = dev_get_drvdata(dev);
90
91 regcache_cache_only(map: adx->regmap, enable: true);
92 regcache_mark_dirty(map: adx->regmap);
93
94 return 0;
95}
96
97static int __maybe_unused tegra210_adx_runtime_resume(struct device *dev)
98{
99 struct tegra210_adx *adx = dev_get_drvdata(dev);
100
101 regcache_cache_only(map: adx->regmap, enable: false);
102 regcache_sync(map: adx->regmap);
103
104 tegra210_adx_write_map_ram(adx);
105
106 return 0;
107}
108
109static int tegra210_adx_set_audio_cif(struct snd_soc_dai *dai,
110 unsigned int channels,
111 snd_pcm_format_t format,
112 unsigned int reg)
113{
114 struct tegra210_adx *adx = snd_soc_dai_get_drvdata(dai);
115 struct tegra_cif_conf cif_conf;
116 int audio_bits;
117
118 memset(&cif_conf, 0, sizeof(struct tegra_cif_conf));
119
120 if (channels < 1 || channels > 16)
121 return -EINVAL;
122
123 switch (format) {
124 case SNDRV_PCM_FORMAT_S8:
125 audio_bits = TEGRA_ACIF_BITS_8;
126 break;
127 case SNDRV_PCM_FORMAT_S16_LE:
128 audio_bits = TEGRA_ACIF_BITS_16;
129 break;
130 case SNDRV_PCM_FORMAT_S32_LE:
131 audio_bits = TEGRA_ACIF_BITS_32;
132 break;
133 default:
134 return -EINVAL;
135 }
136
137 cif_conf.audio_ch = channels;
138 cif_conf.client_ch = channels;
139 cif_conf.audio_bits = audio_bits;
140 cif_conf.client_bits = audio_bits;
141
142 tegra_set_cif(regmap: adx->regmap, reg, conf: &cif_conf);
143
144 return 0;
145}
146
147static int tegra210_adx_out_hw_params(struct snd_pcm_substream *substream,
148 struct snd_pcm_hw_params *params,
149 struct snd_soc_dai *dai)
150{
151 return tegra210_adx_set_audio_cif(dai, channels: params_channels(p: params),
152 format: params_format(p: params),
153 TEGRA210_ADX_TX1_CIF_CTRL + ((dai->id - 1) * TEGRA210_ADX_AUDIOCIF_CH_STRIDE));
154}
155
156static int tegra210_adx_in_hw_params(struct snd_pcm_substream *substream,
157 struct snd_pcm_hw_params *params,
158 struct snd_soc_dai *dai)
159{
160 return tegra210_adx_set_audio_cif(dai, channels: params_channels(p: params),
161 format: params_format(p: params),
162 TEGRA210_ADX_RX_CIF_CTRL);
163}
164
165static int tegra210_adx_get_byte_map(struct snd_kcontrol *kcontrol,
166 struct snd_ctl_elem_value *ucontrol)
167{
168 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
169 struct tegra210_adx *adx = snd_soc_component_get_drvdata(c: cmpnt);
170 struct soc_mixer_control *mc;
171 unsigned char *bytes_map = (unsigned char *)&adx->map;
172 int enabled;
173
174 mc = (struct soc_mixer_control *)kcontrol->private_value;
175 enabled = adx->byte_mask[mc->reg / 32] & (1 << (mc->reg % 32));
176
177 /*
178 * TODO: Simplify this logic to just return from bytes_map[]
179 *
180 * Presently below is required since bytes_map[] is
181 * tightly packed and cannot store the control value of 256.
182 * Byte mask state is used to know if 256 needs to be returned.
183 * Note that for control value of 256, the put() call stores 0
184 * in the bytes_map[] and disables the corresponding bit in
185 * byte_mask[].
186 */
187 if (enabled)
188 ucontrol->value.integer.value[0] = bytes_map[mc->reg];
189 else
190 ucontrol->value.integer.value[0] = 256;
191
192 return 0;
193}
194
195static int tegra210_adx_put_byte_map(struct snd_kcontrol *kcontrol,
196 struct snd_ctl_elem_value *ucontrol)
197{
198 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
199 struct tegra210_adx *adx = snd_soc_component_get_drvdata(c: cmpnt);
200 unsigned char *bytes_map = (unsigned char *)&adx->map;
201 int value = ucontrol->value.integer.value[0];
202 struct soc_mixer_control *mc =
203 (struct soc_mixer_control *)kcontrol->private_value;
204 unsigned int mask_val = adx->byte_mask[mc->reg / 32];
205
206 if (value >= 0 && value <= 255)
207 mask_val |= (1 << (mc->reg % 32));
208 else
209 mask_val &= ~(1 << (mc->reg % 32));
210
211 if (mask_val == adx->byte_mask[mc->reg / 32])
212 return 0;
213
214 /* Update byte map and slot */
215 bytes_map[mc->reg] = value % 256;
216 adx->byte_mask[mc->reg / 32] = mask_val;
217
218 return 1;
219}
220
221static const struct snd_soc_dai_ops tegra210_adx_in_dai_ops = {
222 .hw_params = tegra210_adx_in_hw_params,
223 .startup = tegra210_adx_startup,
224};
225
226static const struct snd_soc_dai_ops tegra210_adx_out_dai_ops = {
227 .hw_params = tegra210_adx_out_hw_params,
228};
229
230#define IN_DAI \
231 { \
232 .name = "ADX-RX-CIF", \
233 .playback = { \
234 .stream_name = "RX-CIF-Playback", \
235 .channels_min = 1, \
236 .channels_max = 16, \
237 .rates = SNDRV_PCM_RATE_8000_192000, \
238 .formats = SNDRV_PCM_FMTBIT_S8 | \
239 SNDRV_PCM_FMTBIT_S16_LE | \
240 SNDRV_PCM_FMTBIT_S32_LE, \
241 }, \
242 .capture = { \
243 .stream_name = "RX-CIF-Capture", \
244 .channels_min = 1, \
245 .channels_max = 16, \
246 .rates = SNDRV_PCM_RATE_8000_192000, \
247 .formats = SNDRV_PCM_FMTBIT_S8 | \
248 SNDRV_PCM_FMTBIT_S16_LE | \
249 SNDRV_PCM_FMTBIT_S32_LE, \
250 }, \
251 .ops = &tegra210_adx_in_dai_ops, \
252 }
253
254#define OUT_DAI(id) \
255 { \
256 .name = "ADX-TX" #id "-CIF", \
257 .playback = { \
258 .stream_name = "TX" #id "-CIF-Playback",\
259 .channels_min = 1, \
260 .channels_max = 16, \
261 .rates = SNDRV_PCM_RATE_8000_192000, \
262 .formats = SNDRV_PCM_FMTBIT_S8 | \
263 SNDRV_PCM_FMTBIT_S16_LE | \
264 SNDRV_PCM_FMTBIT_S32_LE, \
265 }, \
266 .capture = { \
267 .stream_name = "TX" #id "-CIF-Capture", \
268 .channels_min = 1, \
269 .channels_max = 16, \
270 .rates = SNDRV_PCM_RATE_8000_192000, \
271 .formats = SNDRV_PCM_FMTBIT_S8 | \
272 SNDRV_PCM_FMTBIT_S16_LE | \
273 SNDRV_PCM_FMTBIT_S32_LE, \
274 }, \
275 .ops = &tegra210_adx_out_dai_ops, \
276 }
277
278static struct snd_soc_dai_driver tegra210_adx_dais[] = {
279 IN_DAI,
280 OUT_DAI(1),
281 OUT_DAI(2),
282 OUT_DAI(3),
283 OUT_DAI(4),
284};
285
286static const struct snd_soc_dapm_widget tegra210_adx_widgets[] = {
287 SND_SOC_DAPM_AIF_IN("RX", NULL, 0, TEGRA210_ADX_ENABLE,
288 TEGRA210_ADX_ENABLE_SHIFT, 0),
289 SND_SOC_DAPM_AIF_OUT("TX1", NULL, 0, TEGRA210_ADX_CTRL, 0, 0),
290 SND_SOC_DAPM_AIF_OUT("TX2", NULL, 0, TEGRA210_ADX_CTRL, 1, 0),
291 SND_SOC_DAPM_AIF_OUT("TX3", NULL, 0, TEGRA210_ADX_CTRL, 2, 0),
292 SND_SOC_DAPM_AIF_OUT("TX4", NULL, 0, TEGRA210_ADX_CTRL, 3, 0),
293};
294
295#define STREAM_ROUTES(id, sname) \
296 { "XBAR-" sname, NULL, "XBAR-TX" }, \
297 { "RX-CIF-" sname, NULL, "XBAR-" sname }, \
298 { "RX", NULL, "RX-CIF-" sname }, \
299 { "TX" #id, NULL, "RX" }, \
300 { "TX" #id "-CIF-" sname, NULL, "TX" #id }, \
301 { "TX" #id " XBAR-" sname, NULL, "TX" #id "-CIF-" sname }, \
302 { "TX" #id " XBAR-RX", NULL, "TX" #id " XBAR-" sname }
303
304#define ADX_ROUTES(id) \
305 STREAM_ROUTES(id, "Playback"), \
306 STREAM_ROUTES(id, "Capture")
307
308#define STREAM_ROUTES(id, sname) \
309 { "XBAR-" sname, NULL, "XBAR-TX" }, \
310 { "RX-CIF-" sname, NULL, "XBAR-" sname }, \
311 { "RX", NULL, "RX-CIF-" sname }, \
312 { "TX" #id, NULL, "RX" }, \
313 { "TX" #id "-CIF-" sname, NULL, "TX" #id }, \
314 { "TX" #id " XBAR-" sname, NULL, "TX" #id "-CIF-" sname }, \
315 { "TX" #id " XBAR-RX", NULL, "TX" #id " XBAR-" sname }
316
317#define ADX_ROUTES(id) \
318 STREAM_ROUTES(id, "Playback"), \
319 STREAM_ROUTES(id, "Capture")
320
321static const struct snd_soc_dapm_route tegra210_adx_routes[] = {
322 ADX_ROUTES(1),
323 ADX_ROUTES(2),
324 ADX_ROUTES(3),
325 ADX_ROUTES(4),
326};
327
328#define TEGRA210_ADX_BYTE_MAP_CTRL(reg) \
329 SOC_SINGLE_EXT("Byte Map " #reg, reg, 0, 256, 0, \
330 tegra210_adx_get_byte_map, \
331 tegra210_adx_put_byte_map)
332
333static struct snd_kcontrol_new tegra210_adx_controls[] = {
334 TEGRA210_ADX_BYTE_MAP_CTRL(0),
335 TEGRA210_ADX_BYTE_MAP_CTRL(1),
336 TEGRA210_ADX_BYTE_MAP_CTRL(2),
337 TEGRA210_ADX_BYTE_MAP_CTRL(3),
338 TEGRA210_ADX_BYTE_MAP_CTRL(4),
339 TEGRA210_ADX_BYTE_MAP_CTRL(5),
340 TEGRA210_ADX_BYTE_MAP_CTRL(6),
341 TEGRA210_ADX_BYTE_MAP_CTRL(7),
342 TEGRA210_ADX_BYTE_MAP_CTRL(8),
343 TEGRA210_ADX_BYTE_MAP_CTRL(9),
344 TEGRA210_ADX_BYTE_MAP_CTRL(10),
345 TEGRA210_ADX_BYTE_MAP_CTRL(11),
346 TEGRA210_ADX_BYTE_MAP_CTRL(12),
347 TEGRA210_ADX_BYTE_MAP_CTRL(13),
348 TEGRA210_ADX_BYTE_MAP_CTRL(14),
349 TEGRA210_ADX_BYTE_MAP_CTRL(15),
350 TEGRA210_ADX_BYTE_MAP_CTRL(16),
351 TEGRA210_ADX_BYTE_MAP_CTRL(17),
352 TEGRA210_ADX_BYTE_MAP_CTRL(18),
353 TEGRA210_ADX_BYTE_MAP_CTRL(19),
354 TEGRA210_ADX_BYTE_MAP_CTRL(20),
355 TEGRA210_ADX_BYTE_MAP_CTRL(21),
356 TEGRA210_ADX_BYTE_MAP_CTRL(22),
357 TEGRA210_ADX_BYTE_MAP_CTRL(23),
358 TEGRA210_ADX_BYTE_MAP_CTRL(24),
359 TEGRA210_ADX_BYTE_MAP_CTRL(25),
360 TEGRA210_ADX_BYTE_MAP_CTRL(26),
361 TEGRA210_ADX_BYTE_MAP_CTRL(27),
362 TEGRA210_ADX_BYTE_MAP_CTRL(28),
363 TEGRA210_ADX_BYTE_MAP_CTRL(29),
364 TEGRA210_ADX_BYTE_MAP_CTRL(30),
365 TEGRA210_ADX_BYTE_MAP_CTRL(31),
366 TEGRA210_ADX_BYTE_MAP_CTRL(32),
367 TEGRA210_ADX_BYTE_MAP_CTRL(33),
368 TEGRA210_ADX_BYTE_MAP_CTRL(34),
369 TEGRA210_ADX_BYTE_MAP_CTRL(35),
370 TEGRA210_ADX_BYTE_MAP_CTRL(36),
371 TEGRA210_ADX_BYTE_MAP_CTRL(37),
372 TEGRA210_ADX_BYTE_MAP_CTRL(38),
373 TEGRA210_ADX_BYTE_MAP_CTRL(39),
374 TEGRA210_ADX_BYTE_MAP_CTRL(40),
375 TEGRA210_ADX_BYTE_MAP_CTRL(41),
376 TEGRA210_ADX_BYTE_MAP_CTRL(42),
377 TEGRA210_ADX_BYTE_MAP_CTRL(43),
378 TEGRA210_ADX_BYTE_MAP_CTRL(44),
379 TEGRA210_ADX_BYTE_MAP_CTRL(45),
380 TEGRA210_ADX_BYTE_MAP_CTRL(46),
381 TEGRA210_ADX_BYTE_MAP_CTRL(47),
382 TEGRA210_ADX_BYTE_MAP_CTRL(48),
383 TEGRA210_ADX_BYTE_MAP_CTRL(49),
384 TEGRA210_ADX_BYTE_MAP_CTRL(50),
385 TEGRA210_ADX_BYTE_MAP_CTRL(51),
386 TEGRA210_ADX_BYTE_MAP_CTRL(52),
387 TEGRA210_ADX_BYTE_MAP_CTRL(53),
388 TEGRA210_ADX_BYTE_MAP_CTRL(54),
389 TEGRA210_ADX_BYTE_MAP_CTRL(55),
390 TEGRA210_ADX_BYTE_MAP_CTRL(56),
391 TEGRA210_ADX_BYTE_MAP_CTRL(57),
392 TEGRA210_ADX_BYTE_MAP_CTRL(58),
393 TEGRA210_ADX_BYTE_MAP_CTRL(59),
394 TEGRA210_ADX_BYTE_MAP_CTRL(60),
395 TEGRA210_ADX_BYTE_MAP_CTRL(61),
396 TEGRA210_ADX_BYTE_MAP_CTRL(62),
397 TEGRA210_ADX_BYTE_MAP_CTRL(63),
398};
399
400static const struct snd_soc_component_driver tegra210_adx_cmpnt = {
401 .dapm_widgets = tegra210_adx_widgets,
402 .num_dapm_widgets = ARRAY_SIZE(tegra210_adx_widgets),
403 .dapm_routes = tegra210_adx_routes,
404 .num_dapm_routes = ARRAY_SIZE(tegra210_adx_routes),
405 .controls = tegra210_adx_controls,
406 .num_controls = ARRAY_SIZE(tegra210_adx_controls),
407};
408
409static bool tegra210_adx_wr_reg(struct device *dev,
410 unsigned int reg)
411{
412 switch (reg) {
413 case TEGRA210_ADX_TX_INT_MASK ... TEGRA210_ADX_TX4_CIF_CTRL:
414 case TEGRA210_ADX_RX_INT_MASK ... TEGRA210_ADX_RX_CIF_CTRL:
415 case TEGRA210_ADX_ENABLE ... TEGRA210_ADX_CG:
416 case TEGRA210_ADX_CTRL ... TEGRA210_ADX_IN_BYTE_EN1:
417 case TEGRA210_ADX_CFG_RAM_CTRL ... TEGRA210_ADX_CFG_RAM_DATA:
418 return true;
419 default:
420 return false;
421 }
422}
423
424static bool tegra210_adx_rd_reg(struct device *dev,
425 unsigned int reg)
426{
427 switch (reg) {
428 case TEGRA210_ADX_RX_STATUS ... TEGRA210_ADX_CFG_RAM_DATA:
429 return true;
430 default:
431 return false;
432 }
433}
434
435static bool tegra210_adx_volatile_reg(struct device *dev,
436 unsigned int reg)
437{
438 switch (reg) {
439 case TEGRA210_ADX_RX_STATUS:
440 case TEGRA210_ADX_RX_INT_STATUS:
441 case TEGRA210_ADX_RX_INT_SET:
442 case TEGRA210_ADX_TX_STATUS:
443 case TEGRA210_ADX_TX_INT_STATUS:
444 case TEGRA210_ADX_TX_INT_SET:
445 case TEGRA210_ADX_SOFT_RESET:
446 case TEGRA210_ADX_STATUS:
447 case TEGRA210_ADX_INT_STATUS:
448 case TEGRA210_ADX_CFG_RAM_CTRL:
449 case TEGRA210_ADX_CFG_RAM_DATA:
450 return true;
451 default:
452 break;
453 }
454
455 return false;
456}
457
458static const struct regmap_config tegra210_adx_regmap_config = {
459 .reg_bits = 32,
460 .reg_stride = 4,
461 .val_bits = 32,
462 .max_register = TEGRA210_ADX_CFG_RAM_DATA,
463 .writeable_reg = tegra210_adx_wr_reg,
464 .readable_reg = tegra210_adx_rd_reg,
465 .volatile_reg = tegra210_adx_volatile_reg,
466 .reg_defaults = tegra210_adx_reg_defaults,
467 .num_reg_defaults = ARRAY_SIZE(tegra210_adx_reg_defaults),
468 .cache_type = REGCACHE_FLAT,
469};
470
471static const struct of_device_id tegra210_adx_of_match[] = {
472 { .compatible = "nvidia,tegra210-adx" },
473 {},
474};
475MODULE_DEVICE_TABLE(of, tegra210_adx_of_match);
476
477static int tegra210_adx_platform_probe(struct platform_device *pdev)
478{
479 struct device *dev = &pdev->dev;
480 struct tegra210_adx *adx;
481 void __iomem *regs;
482 int err;
483
484 adx = devm_kzalloc(dev, size: sizeof(*adx), GFP_KERNEL);
485 if (!adx)
486 return -ENOMEM;
487
488 dev_set_drvdata(dev, data: adx);
489
490 regs = devm_platform_ioremap_resource(pdev, index: 0);
491 if (IS_ERR(ptr: regs))
492 return PTR_ERR(ptr: regs);
493
494 adx->regmap = devm_regmap_init_mmio(dev, regs,
495 &tegra210_adx_regmap_config);
496 if (IS_ERR(ptr: adx->regmap)) {
497 dev_err(dev, "regmap init failed\n");
498 return PTR_ERR(ptr: adx->regmap);
499 }
500
501 regcache_cache_only(map: adx->regmap, enable: true);
502
503 err = devm_snd_soc_register_component(dev, component_driver: &tegra210_adx_cmpnt,
504 dai_drv: tegra210_adx_dais,
505 ARRAY_SIZE(tegra210_adx_dais));
506 if (err) {
507 dev_err(dev, "can't register ADX component, err: %d\n", err);
508 return err;
509 }
510
511 pm_runtime_enable(dev);
512
513 return 0;
514}
515
516static void tegra210_adx_platform_remove(struct platform_device *pdev)
517{
518 pm_runtime_disable(dev: &pdev->dev);
519}
520
521static const struct dev_pm_ops tegra210_adx_pm_ops = {
522 SET_RUNTIME_PM_OPS(tegra210_adx_runtime_suspend,
523 tegra210_adx_runtime_resume, NULL)
524 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
525 pm_runtime_force_resume)
526};
527
528static struct platform_driver tegra210_adx_driver = {
529 .driver = {
530 .name = "tegra210-adx",
531 .of_match_table = tegra210_adx_of_match,
532 .pm = &tegra210_adx_pm_ops,
533 },
534 .probe = tegra210_adx_platform_probe,
535 .remove_new = tegra210_adx_platform_remove,
536};
537module_platform_driver(tegra210_adx_driver);
538
539MODULE_AUTHOR("Arun Shamanna Lakshmi <aruns@nvidia.com>");
540MODULE_DESCRIPTION("Tegra210 ADX ASoC driver");
541MODULE_LICENSE("GPL v2");
542

source code of linux/sound/soc/tegra/tegra210_adx.c