1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // HDA audio driver for Cirrus Logic CS35L56 smart amp
4 //
5 // Copyright (C) 2023 Cirrus Logic, Inc. and
6 // Cirrus Logic International Semiconductor Ltd.
7 //
8
9 #include <linux/acpi.h>
10 #include <linux/debugfs.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/module.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/regmap.h>
15 #include <linux/slab.h>
16 #include <sound/core.h>
17 #include <sound/cs-amp-lib.h>
18 #include <sound/hda_codec.h>
19 #include <sound/tlv.h>
20 #include "cirrus_scodec.h"
21 #include "cs35l56_hda.h"
22 #include "hda_component.h"
23 #include "hda_cs_dsp_ctl.h"
24 #include "hda_generic.h"
25
26 /*
27 * The cs35l56_hda_dai_config[] reg sequence configures the device as
28 * ASP1_BCLK_FREQ = 3.072 MHz
29 * ASP1_RX_WIDTH = 32 cycles per slot, ASP1_TX_WIDTH = 32 cycles per slot, ASP1_FMT = I2S
30 * ASP1_DOUT_HIZ_CONTROL = Hi-Z during unused timeslots
31 * ASP1_RX_WL = 24 bits per sample
32 * ASP1_TX_WL = 24 bits per sample
33 * ASP1_RXn_EN 1..3 and ASP1_TXn_EN 1..4 disabled
34 *
35 * Override any Windows-specific mixer settings applied by the firmware.
36 */
37 static const struct reg_sequence cs35l56_hda_dai_config[] = {
38 { CS35L56_ASP1_CONTROL1, 0x00000021 },
39 { CS35L56_ASP1_CONTROL2, 0x20200200 },
40 { CS35L56_ASP1_CONTROL3, 0x00000003 },
41 { CS35L56_ASP1_FRAME_CONTROL1, 0x03020100 },
42 { CS35L56_ASP1_FRAME_CONTROL5, 0x00020100 },
43 { CS35L56_ASP1_DATA_CONTROL5, 0x00000018 },
44 { CS35L56_ASP1_DATA_CONTROL1, 0x00000018 },
45 { CS35L56_ASP1_ENABLES1, 0x00000000 },
46 { CS35L56_ASP1TX1_INPUT, 0x00000018 },
47 { CS35L56_ASP1TX2_INPUT, 0x00000019 },
48 { CS35L56_ASP1TX3_INPUT, 0x00000020 },
49 { CS35L56_ASP1TX4_INPUT, 0x00000028 },
50
51 };
52
cs35l56_hda_wait_dsp_ready(struct cs35l56_hda * cs35l56)53 static void cs35l56_hda_wait_dsp_ready(struct cs35l56_hda *cs35l56)
54 {
55 /* Wait for patching to complete */
56 flush_work(&cs35l56->dsp_work);
57 }
58
cs35l56_hda_play(struct cs35l56_hda * cs35l56)59 static void cs35l56_hda_play(struct cs35l56_hda *cs35l56)
60 {
61 unsigned int val;
62 int ret;
63
64 cs35l56_hda_wait_dsp_ready(cs35l56);
65
66 pm_runtime_get_sync(cs35l56->base.dev);
67 ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_PLAY);
68 if (ret == 0) {
69 /* Wait for firmware to enter PS0 power state */
70 ret = regmap_read_poll_timeout(cs35l56->base.regmap,
71 CS35L56_TRANSDUCER_ACTUAL_PS,
72 val, (val == CS35L56_PS0),
73 CS35L56_PS0_POLL_US,
74 CS35L56_PS0_TIMEOUT_US);
75 if (ret)
76 dev_warn(cs35l56->base.dev, "PS0 wait failed: %d\n", ret);
77 }
78 regmap_set_bits(cs35l56->base.regmap, CS35L56_ASP1_ENABLES1,
79 BIT(CS35L56_ASP_RX1_EN_SHIFT) | BIT(CS35L56_ASP_RX2_EN_SHIFT) |
80 cs35l56->asp_tx_mask);
81 cs35l56->playing = true;
82 }
83
cs35l56_hda_pause(struct cs35l56_hda * cs35l56)84 static void cs35l56_hda_pause(struct cs35l56_hda *cs35l56)
85 {
86 cs35l56->playing = false;
87 cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_PAUSE);
88 regmap_clear_bits(cs35l56->base.regmap, CS35L56_ASP1_ENABLES1,
89 BIT(CS35L56_ASP_RX1_EN_SHIFT) | BIT(CS35L56_ASP_RX2_EN_SHIFT) |
90 BIT(CS35L56_ASP_TX1_EN_SHIFT) | BIT(CS35L56_ASP_TX2_EN_SHIFT) |
91 BIT(CS35L56_ASP_TX3_EN_SHIFT) | BIT(CS35L56_ASP_TX4_EN_SHIFT));
92
93 pm_runtime_mark_last_busy(cs35l56->base.dev);
94 pm_runtime_put_autosuspend(cs35l56->base.dev);
95 }
96
cs35l56_hda_playback_hook(struct device * dev,int action)97 static void cs35l56_hda_playback_hook(struct device *dev, int action)
98 {
99 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
100
101 dev_dbg(cs35l56->base.dev, "%s()%d: action: %d\n", __func__, __LINE__, action);
102
103 switch (action) {
104 case HDA_GEN_PCM_ACT_PREPARE:
105 if (cs35l56->playing)
106 break;
107
108 /* If we're suspended: flag that resume should start playback */
109 if (cs35l56->suspended) {
110 cs35l56->playing = true;
111 break;
112 }
113
114 cs35l56_hda_play(cs35l56);
115 break;
116 case HDA_GEN_PCM_ACT_CLEANUP:
117 if (!cs35l56->playing)
118 break;
119
120 cs35l56_hda_pause(cs35l56);
121 break;
122 default:
123 break;
124 }
125 }
126
cs35l56_hda_runtime_suspend(struct device * dev)127 static int cs35l56_hda_runtime_suspend(struct device *dev)
128 {
129 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
130
131 if (cs35l56->cs_dsp.booted)
132 cs_dsp_stop(&cs35l56->cs_dsp);
133
134 return cs35l56_runtime_suspend_common(&cs35l56->base);
135 }
136
cs35l56_hda_runtime_resume(struct device * dev)137 static int cs35l56_hda_runtime_resume(struct device *dev)
138 {
139 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
140 int ret;
141
142 ret = cs35l56_runtime_resume_common(&cs35l56->base, false);
143 if (ret < 0)
144 return ret;
145
146 if (cs35l56->cs_dsp.booted) {
147 ret = cs_dsp_run(&cs35l56->cs_dsp);
148 if (ret) {
149 dev_dbg(cs35l56->base.dev, "%s: cs_dsp_run ret %d\n", __func__, ret);
150 goto err;
151 }
152 }
153
154 return 0;
155
156 err:
157 cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_ALLOW_AUTO_HIBERNATE);
158 regmap_write(cs35l56->base.regmap, CS35L56_DSP_VIRTUAL1_MBOX_1,
159 CS35L56_MBOX_CMD_HIBERNATE_NOW);
160
161 regcache_cache_only(cs35l56->base.regmap, true);
162
163 return ret;
164 }
165
cs35l56_hda_mixer_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)166 static int cs35l56_hda_mixer_info(struct snd_kcontrol *kcontrol,
167 struct snd_ctl_elem_info *uinfo)
168 {
169 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
170 uinfo->count = 1;
171 uinfo->value.enumerated.items = CS35L56_NUM_INPUT_SRC;
172 if (uinfo->value.enumerated.item >= CS35L56_NUM_INPUT_SRC)
173 uinfo->value.enumerated.item = CS35L56_NUM_INPUT_SRC - 1;
174 strscpy(uinfo->value.enumerated.name, cs35l56_tx_input_texts[uinfo->value.enumerated.item],
175 sizeof(uinfo->value.enumerated.name));
176
177 return 0;
178 }
179
cs35l56_hda_mixer_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)180 static int cs35l56_hda_mixer_get(struct snd_kcontrol *kcontrol,
181 struct snd_ctl_elem_value *ucontrol)
182 {
183 struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
184 unsigned int reg_val;
185 int i;
186
187 cs35l56_hda_wait_dsp_ready(cs35l56);
188
189 regmap_read(cs35l56->base.regmap, kcontrol->private_value, ®_val);
190 reg_val &= CS35L56_ASP_TXn_SRC_MASK;
191
192 for (i = 0; i < CS35L56_NUM_INPUT_SRC; ++i) {
193 if (cs35l56_tx_input_values[i] == reg_val) {
194 ucontrol->value.enumerated.item[0] = i;
195 break;
196 }
197 }
198
199 return 0;
200 }
201
cs35l56_hda_mixer_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)202 static int cs35l56_hda_mixer_put(struct snd_kcontrol *kcontrol,
203 struct snd_ctl_elem_value *ucontrol)
204 {
205 struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
206 unsigned int item = ucontrol->value.enumerated.item[0];
207 bool changed;
208
209 if (item >= CS35L56_NUM_INPUT_SRC)
210 return -EINVAL;
211
212 cs35l56_hda_wait_dsp_ready(cs35l56);
213
214 regmap_update_bits_check(cs35l56->base.regmap, kcontrol->private_value,
215 CS35L56_INPUT_MASK, cs35l56_tx_input_values[item],
216 &changed);
217
218 return changed;
219 }
220
cs35l56_hda_posture_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)221 static int cs35l56_hda_posture_info(struct snd_kcontrol *kcontrol,
222 struct snd_ctl_elem_info *uinfo)
223 {
224 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
225 uinfo->count = 1;
226 uinfo->value.integer.min = CS35L56_MAIN_POSTURE_MIN;
227 uinfo->value.integer.max = CS35L56_MAIN_POSTURE_MAX;
228 return 0;
229 }
230
cs35l56_hda_posture_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)231 static int cs35l56_hda_posture_get(struct snd_kcontrol *kcontrol,
232 struct snd_ctl_elem_value *ucontrol)
233 {
234 struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
235 unsigned int pos;
236 int ret;
237
238 cs35l56_hda_wait_dsp_ready(cs35l56);
239
240 ret = regmap_read(cs35l56->base.regmap, CS35L56_MAIN_POSTURE_NUMBER, &pos);
241 if (ret)
242 return ret;
243
244 ucontrol->value.integer.value[0] = pos;
245
246 return 0;
247 }
248
cs35l56_hda_posture_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)249 static int cs35l56_hda_posture_put(struct snd_kcontrol *kcontrol,
250 struct snd_ctl_elem_value *ucontrol)
251 {
252 struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
253 unsigned long pos = ucontrol->value.integer.value[0];
254 bool changed;
255 int ret;
256
257 if ((pos < CS35L56_MAIN_POSTURE_MIN) ||
258 (pos > CS35L56_MAIN_POSTURE_MAX))
259 return -EINVAL;
260
261 cs35l56_hda_wait_dsp_ready(cs35l56);
262
263 ret = regmap_update_bits_check(cs35l56->base.regmap,
264 CS35L56_MAIN_POSTURE_NUMBER,
265 CS35L56_MAIN_POSTURE_MASK,
266 pos, &changed);
267 if (ret)
268 return ret;
269
270 return changed;
271 }
272
273 static const struct {
274 const char *name;
275 unsigned int reg;
276 } cs35l56_hda_mixer_controls[] = {
277 { "ASP1 TX1 Source", CS35L56_ASP1TX1_INPUT },
278 { "ASP1 TX2 Source", CS35L56_ASP1TX2_INPUT },
279 { "ASP1 TX3 Source", CS35L56_ASP1TX3_INPUT },
280 { "ASP1 TX4 Source", CS35L56_ASP1TX4_INPUT },
281 };
282
283 static const DECLARE_TLV_DB_SCALE(cs35l56_hda_vol_tlv, -10000, 25, 0);
284
cs35l56_hda_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)285 static int cs35l56_hda_vol_info(struct snd_kcontrol *kcontrol,
286 struct snd_ctl_elem_info *uinfo)
287 {
288 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
289 uinfo->count = 1;
290 uinfo->value.integer.step = 1;
291 uinfo->value.integer.min = 0;
292 uinfo->value.integer.max = CS35L56_MAIN_RENDER_USER_VOLUME_MAX -
293 CS35L56_MAIN_RENDER_USER_VOLUME_MIN;
294
295 return 0;
296 }
297
cs35l56_hda_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)298 static int cs35l56_hda_vol_get(struct snd_kcontrol *kcontrol,
299 struct snd_ctl_elem_value *ucontrol)
300 {
301 struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
302 unsigned int raw_vol;
303 int vol;
304 int ret;
305
306 cs35l56_hda_wait_dsp_ready(cs35l56);
307
308 ret = regmap_read(cs35l56->base.regmap, CS35L56_MAIN_RENDER_USER_VOLUME, &raw_vol);
309
310 if (ret)
311 return ret;
312
313 vol = (s16)(raw_vol & 0xFFFF);
314 vol >>= CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT;
315
316 if (vol & BIT(CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT))
317 vol |= ~((int)(BIT(CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT) - 1));
318
319 ucontrol->value.integer.value[0] = vol - CS35L56_MAIN_RENDER_USER_VOLUME_MIN;
320
321 return 0;
322 }
323
cs35l56_hda_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)324 static int cs35l56_hda_vol_put(struct snd_kcontrol *kcontrol,
325 struct snd_ctl_elem_value *ucontrol)
326 {
327 struct cs35l56_hda *cs35l56 = (struct cs35l56_hda *)kcontrol->private_data;
328 long vol = ucontrol->value.integer.value[0];
329 unsigned int raw_vol;
330 bool changed;
331 int ret;
332
333 if ((vol < 0) || (vol > (CS35L56_MAIN_RENDER_USER_VOLUME_MAX -
334 CS35L56_MAIN_RENDER_USER_VOLUME_MIN)))
335 return -EINVAL;
336
337 raw_vol = (vol + CS35L56_MAIN_RENDER_USER_VOLUME_MIN) <<
338 CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT;
339
340 cs35l56_hda_wait_dsp_ready(cs35l56);
341
342 ret = regmap_update_bits_check(cs35l56->base.regmap,
343 CS35L56_MAIN_RENDER_USER_VOLUME,
344 CS35L56_MAIN_RENDER_USER_VOLUME_MASK,
345 raw_vol, &changed);
346 if (ret)
347 return ret;
348
349 return changed;
350 }
351
cs35l56_hda_create_controls(struct cs35l56_hda * cs35l56)352 static void cs35l56_hda_create_controls(struct cs35l56_hda *cs35l56)
353 {
354 struct snd_kcontrol_new ctl_template = {
355 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
356 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
357 .info = cs35l56_hda_posture_info,
358 .get = cs35l56_hda_posture_get,
359 .put = cs35l56_hda_posture_put,
360 };
361 char name[64];
362 int i;
363
364 snprintf(name, sizeof(name), "%s Posture Number", cs35l56->amp_name);
365 ctl_template.name = name;
366 cs35l56->posture_ctl = snd_ctl_new1(&ctl_template, cs35l56);
367 if (snd_ctl_add(cs35l56->codec->card, cs35l56->posture_ctl))
368 dev_err(cs35l56->base.dev, "Failed to add KControl: %s\n", ctl_template.name);
369
370 /* Mixer controls */
371 ctl_template.info = cs35l56_hda_mixer_info;
372 ctl_template.get = cs35l56_hda_mixer_get;
373 ctl_template.put = cs35l56_hda_mixer_put;
374
375 BUILD_BUG_ON(ARRAY_SIZE(cs35l56->mixer_ctl) != ARRAY_SIZE(cs35l56_hda_mixer_controls));
376
377 for (i = 0; i < ARRAY_SIZE(cs35l56_hda_mixer_controls); ++i) {
378 snprintf(name, sizeof(name), "%s %s", cs35l56->amp_name,
379 cs35l56_hda_mixer_controls[i].name);
380 ctl_template.private_value = cs35l56_hda_mixer_controls[i].reg;
381 cs35l56->mixer_ctl[i] = snd_ctl_new1(&ctl_template, cs35l56);
382 if (snd_ctl_add(cs35l56->codec->card, cs35l56->mixer_ctl[i])) {
383 dev_err(cs35l56->base.dev, "Failed to add KControl: %s\n",
384 ctl_template.name);
385 }
386 }
387
388 ctl_template.info = cs35l56_hda_vol_info;
389 ctl_template.get = cs35l56_hda_vol_get;
390 ctl_template.put = cs35l56_hda_vol_put;
391 ctl_template.access = (SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ);
392 ctl_template.tlv.p = cs35l56_hda_vol_tlv;
393 snprintf(name, sizeof(name), "%s Speaker Playback Volume", cs35l56->amp_name);
394 ctl_template.name = name;
395 cs35l56->volume_ctl = snd_ctl_new1(&ctl_template, cs35l56);
396 if (snd_ctl_add(cs35l56->codec->card, cs35l56->volume_ctl))
397 dev_err(cs35l56->base.dev, "Failed to add KControl: %s\n", ctl_template.name);
398 }
399
cs35l56_hda_remove_controls(struct cs35l56_hda * cs35l56)400 static void cs35l56_hda_remove_controls(struct cs35l56_hda *cs35l56)
401 {
402 int i;
403
404 for (i = ARRAY_SIZE(cs35l56->mixer_ctl) - 1; i >= 0; i--)
405 snd_ctl_remove(cs35l56->codec->card, cs35l56->mixer_ctl[i]);
406
407 snd_ctl_remove(cs35l56->codec->card, cs35l56->posture_ctl);
408 snd_ctl_remove(cs35l56->codec->card, cs35l56->volume_ctl);
409 }
410
411 static const struct cs_dsp_client_ops cs35l56_hda_client_ops = {
412 /* cs_dsp requires the client to provide this even if it is empty */
413 };
414
cs35l56_hda_request_firmware_file(struct cs35l56_hda * cs35l56,const struct firmware ** firmware,char ** filename,const char * base_name,const char * system_name,const char * amp_name,const char * filetype)415 static int cs35l56_hda_request_firmware_file(struct cs35l56_hda *cs35l56,
416 const struct firmware **firmware, char **filename,
417 const char *base_name, const char *system_name,
418 const char *amp_name,
419 const char *filetype)
420 {
421 char *s, c;
422 int ret = 0;
423
424 if (system_name && amp_name)
425 *filename = kasprintf(GFP_KERNEL, "%s-%s-%s.%s", base_name,
426 system_name, amp_name, filetype);
427 else if (system_name)
428 *filename = kasprintf(GFP_KERNEL, "%s-%s.%s", base_name,
429 system_name, filetype);
430 else
431 *filename = kasprintf(GFP_KERNEL, "%s.%s", base_name, filetype);
432
433 if (!*filename)
434 return -ENOMEM;
435
436 /*
437 * Make sure that filename is lower-case and any non alpha-numeric
438 * characters except full stop and forward slash are replaced with
439 * hyphens.
440 */
441 s = *filename;
442 while (*s) {
443 c = *s;
444 if (isalnum(c))
445 *s = tolower(c);
446 else if (c != '.' && c != '/')
447 *s = '-';
448 s++;
449 }
450
451 ret = firmware_request_nowarn(firmware, *filename, cs35l56->base.dev);
452 if (ret) {
453 dev_dbg(cs35l56->base.dev, "Failed to request '%s'\n", *filename);
454 kfree(*filename);
455 *filename = NULL;
456 return ret;
457 }
458
459 dev_dbg(cs35l56->base.dev, "Found '%s'\n", *filename);
460
461 return 0;
462 }
463
cs35l56_hda_request_firmware_files(struct cs35l56_hda * cs35l56,unsigned int preloaded_fw_ver,const struct firmware ** wmfw_firmware,char ** wmfw_filename,const struct firmware ** coeff_firmware,char ** coeff_filename)464 static void cs35l56_hda_request_firmware_files(struct cs35l56_hda *cs35l56,
465 unsigned int preloaded_fw_ver,
466 const struct firmware **wmfw_firmware,
467 char **wmfw_filename,
468 const struct firmware **coeff_firmware,
469 char **coeff_filename)
470 {
471 const char *system_name = cs35l56->system_name;
472 const char *amp_name = cs35l56->amp_name;
473 char base_name[37];
474 int ret;
475
476 if (preloaded_fw_ver) {
477 snprintf(base_name, sizeof(base_name),
478 "cirrus/cs35l%02x-%02x%s-%06x-dsp1-misc",
479 cs35l56->base.type,
480 cs35l56->base.rev,
481 cs35l56->base.secured ? "-s" : "",
482 preloaded_fw_ver & 0xffffff);
483 } else {
484 snprintf(base_name, sizeof(base_name),
485 "cirrus/cs35l%02x-%02x%s-dsp1-misc",
486 cs35l56->base.type,
487 cs35l56->base.rev,
488 cs35l56->base.secured ? "-s" : "");
489 }
490
491 if (system_name && amp_name) {
492 if (!cs35l56_hda_request_firmware_file(cs35l56, wmfw_firmware, wmfw_filename,
493 base_name, system_name, amp_name, "wmfw")) {
494 cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
495 base_name, system_name, amp_name, "bin");
496 return;
497 }
498 }
499
500 if (system_name) {
501 if (!cs35l56_hda_request_firmware_file(cs35l56, wmfw_firmware, wmfw_filename,
502 base_name, system_name, NULL, "wmfw")) {
503 if (amp_name)
504 cs35l56_hda_request_firmware_file(cs35l56,
505 coeff_firmware, coeff_filename,
506 base_name, system_name,
507 amp_name, "bin");
508 if (!*coeff_firmware)
509 cs35l56_hda_request_firmware_file(cs35l56,
510 coeff_firmware, coeff_filename,
511 base_name, system_name,
512 NULL, "bin");
513 return;
514 }
515
516 /*
517 * Check for system-specific bin files without wmfw before
518 * falling back to generic firmware
519 */
520 if (amp_name)
521 cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
522 base_name, system_name, amp_name, "bin");
523 if (!*coeff_firmware)
524 cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
525 base_name, system_name, NULL, "bin");
526
527 if (*coeff_firmware)
528 return;
529 }
530
531 ret = cs35l56_hda_request_firmware_file(cs35l56, wmfw_firmware, wmfw_filename,
532 base_name, NULL, NULL, "wmfw");
533 if (!ret) {
534 cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
535 base_name, NULL, NULL, "bin");
536 return;
537 }
538
539 if (!*coeff_firmware)
540 cs35l56_hda_request_firmware_file(cs35l56, coeff_firmware, coeff_filename,
541 base_name, NULL, NULL, "bin");
542 }
543
cs35l56_hda_release_firmware_files(const struct firmware * wmfw_firmware,char * wmfw_filename,const struct firmware * coeff_firmware,char * coeff_filename)544 static void cs35l56_hda_release_firmware_files(const struct firmware *wmfw_firmware,
545 char *wmfw_filename,
546 const struct firmware *coeff_firmware,
547 char *coeff_filename)
548 {
549 if (wmfw_firmware)
550 release_firmware(wmfw_firmware);
551 kfree(wmfw_filename);
552
553 if (coeff_firmware)
554 release_firmware(coeff_firmware);
555 kfree(coeff_filename);
556 }
557
cs35l56_hda_apply_calibration(struct cs35l56_hda * cs35l56)558 static void cs35l56_hda_apply_calibration(struct cs35l56_hda *cs35l56)
559 {
560 int ret;
561
562 if (!cs35l56->base.cal_data_valid || cs35l56->base.secured)
563 return;
564
565 ret = cs_amp_write_cal_coeffs(&cs35l56->cs_dsp,
566 &cs35l56_calibration_controls,
567 &cs35l56->base.cal_data);
568 if (ret < 0)
569 dev_warn(cs35l56->base.dev, "Failed to write calibration: %d\n", ret);
570 else
571 dev_info(cs35l56->base.dev, "Calibration applied\n");
572 }
573
cs35l56_hda_fw_load(struct cs35l56_hda * cs35l56)574 static void cs35l56_hda_fw_load(struct cs35l56_hda *cs35l56)
575 {
576 const struct firmware *coeff_firmware = NULL;
577 const struct firmware *wmfw_firmware = NULL;
578 char *coeff_filename = NULL;
579 char *wmfw_filename = NULL;
580 unsigned int preloaded_fw_ver;
581 bool firmware_missing;
582 int ret;
583
584 /*
585 * Prepare for a new DSP power-up. If the DSP has had firmware
586 * downloaded previously then it needs to be powered down so that it
587 * can be updated.
588 */
589 if (cs35l56->base.fw_patched)
590 cs_dsp_power_down(&cs35l56->cs_dsp);
591
592 cs35l56->base.fw_patched = false;
593
594 ret = pm_runtime_resume_and_get(cs35l56->base.dev);
595 if (ret < 0) {
596 dev_err(cs35l56->base.dev, "Failed to resume and get %d\n", ret);
597 return;
598 }
599
600 /*
601 * The firmware can only be upgraded if it is currently running
602 * from the built-in ROM. If not, the wmfw/bin must be for the
603 * version of firmware that is running on the chip.
604 */
605 ret = cs35l56_read_prot_status(&cs35l56->base, &firmware_missing, &preloaded_fw_ver);
606 if (ret)
607 goto err_pm_put;
608
609 if (firmware_missing)
610 preloaded_fw_ver = 0;
611
612 cs35l56_hda_request_firmware_files(cs35l56, preloaded_fw_ver,
613 &wmfw_firmware, &wmfw_filename,
614 &coeff_firmware, &coeff_filename);
615
616 /*
617 * If the BIOS didn't patch the firmware a bin file is mandatory to
618 * enable the ASP·
619 */
620 if (!coeff_firmware && firmware_missing) {
621 dev_err(cs35l56->base.dev, ".bin file required but not found\n");
622 goto err_fw_release;
623 }
624
625 mutex_lock(&cs35l56->base.irq_lock);
626
627 /*
628 * If the firmware hasn't been patched it must be shutdown before
629 * doing a full patch and reset afterwards. If it is already
630 * running a patched version the firmware files only contain
631 * tunings and we can use the lower cost reinit sequence instead.
632 */
633 if (firmware_missing && (wmfw_firmware || coeff_firmware)) {
634 ret = cs35l56_firmware_shutdown(&cs35l56->base);
635 if (ret)
636 goto err;
637 }
638
639 ret = cs_dsp_power_up(&cs35l56->cs_dsp, wmfw_firmware, wmfw_filename,
640 coeff_firmware, coeff_filename, "misc");
641 if (ret) {
642 dev_dbg(cs35l56->base.dev, "%s: cs_dsp_power_up ret %d\n", __func__, ret);
643 goto err;
644 }
645
646 if (wmfw_filename)
647 dev_dbg(cs35l56->base.dev, "Loaded WMFW Firmware: %s\n", wmfw_filename);
648
649 if (coeff_filename)
650 dev_dbg(cs35l56->base.dev, "Loaded Coefficients: %s\n", coeff_filename);
651
652 /* If we downloaded firmware, reset the device and wait for it to boot */
653 if (firmware_missing && (wmfw_firmware || coeff_firmware)) {
654 cs35l56_system_reset(&cs35l56->base, false);
655 regcache_mark_dirty(cs35l56->base.regmap);
656 ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
657 if (ret)
658 goto err_powered_up;
659
660 regcache_cache_only(cs35l56->base.regmap, false);
661 }
662
663 /* Disable auto-hibernate so that runtime_pm has control */
664 ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE);
665 if (ret)
666 goto err_powered_up;
667
668 regcache_sync(cs35l56->base.regmap);
669
670 regmap_clear_bits(cs35l56->base.regmap, CS35L56_PROTECTION_STATUS,
671 CS35L56_FIRMWARE_MISSING);
672 cs35l56->base.fw_patched = true;
673
674 ret = cs_dsp_run(&cs35l56->cs_dsp);
675 if (ret)
676 dev_dbg(cs35l56->base.dev, "%s: cs_dsp_run ret %d\n", __func__, ret);
677
678 cs35l56_hda_apply_calibration(cs35l56);
679 ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_REINIT);
680 if (ret)
681 cs_dsp_stop(&cs35l56->cs_dsp);
682
683 err_powered_up:
684 if (!cs35l56->base.fw_patched)
685 cs_dsp_power_down(&cs35l56->cs_dsp);
686 err:
687 mutex_unlock(&cs35l56->base.irq_lock);
688 err_fw_release:
689 cs35l56_hda_release_firmware_files(wmfw_firmware, wmfw_filename,
690 coeff_firmware, coeff_filename);
691 err_pm_put:
692 pm_runtime_put(cs35l56->base.dev);
693 }
694
cs35l56_hda_dsp_work(struct work_struct * work)695 static void cs35l56_hda_dsp_work(struct work_struct *work)
696 {
697 struct cs35l56_hda *cs35l56 = container_of(work, struct cs35l56_hda, dsp_work);
698
699 cs35l56_hda_fw_load(cs35l56);
700 }
701
cs35l56_hda_bind(struct device * dev,struct device * master,void * master_data)702 static int cs35l56_hda_bind(struct device *dev, struct device *master, void *master_data)
703 {
704 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
705 struct hda_component_parent *parent = master_data;
706 struct hda_component *comp;
707
708 comp = hda_component_from_index(parent, cs35l56->index);
709 if (!comp)
710 return -EINVAL;
711
712 if (comp->dev)
713 return -EBUSY;
714
715 comp->dev = dev;
716 cs35l56->codec = parent->codec;
717 strscpy(comp->name, dev_name(dev), sizeof(comp->name));
718 comp->playback_hook = cs35l56_hda_playback_hook;
719
720 queue_work(system_long_wq, &cs35l56->dsp_work);
721
722 cs35l56_hda_create_controls(cs35l56);
723
724 #if IS_ENABLED(CONFIG_SND_DEBUG)
725 cs35l56->debugfs_root = debugfs_create_dir(dev_name(cs35l56->base.dev), sound_debugfs_root);
726 cs_dsp_init_debugfs(&cs35l56->cs_dsp, cs35l56->debugfs_root);
727 #endif
728
729 dev_dbg(cs35l56->base.dev, "Bound\n");
730
731 return 0;
732 }
733
cs35l56_hda_unbind(struct device * dev,struct device * master,void * master_data)734 static void cs35l56_hda_unbind(struct device *dev, struct device *master, void *master_data)
735 {
736 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
737 struct hda_component_parent *parent = master_data;
738 struct hda_component *comp;
739
740 cancel_work_sync(&cs35l56->dsp_work);
741
742 cs35l56_hda_remove_controls(cs35l56);
743
744 #if IS_ENABLED(CONFIG_SND_DEBUG)
745 cs_dsp_cleanup_debugfs(&cs35l56->cs_dsp);
746 debugfs_remove_recursive(cs35l56->debugfs_root);
747 #endif
748
749 if (cs35l56->base.fw_patched)
750 cs_dsp_power_down(&cs35l56->cs_dsp);
751
752 comp = hda_component_from_index(parent, cs35l56->index);
753 if (comp && (comp->dev == dev))
754 memset(comp, 0, sizeof(*comp));
755
756 cs35l56->codec = NULL;
757
758 dev_dbg(cs35l56->base.dev, "Unbound\n");
759 }
760
761 static const struct component_ops cs35l56_hda_comp_ops = {
762 .bind = cs35l56_hda_bind,
763 .unbind = cs35l56_hda_unbind,
764 };
765
cs35l56_hda_system_suspend(struct device * dev)766 static int cs35l56_hda_system_suspend(struct device *dev)
767 {
768 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
769
770 cs35l56_hda_wait_dsp_ready(cs35l56);
771
772 if (cs35l56->playing)
773 cs35l56_hda_pause(cs35l56);
774
775 cs35l56->suspended = true;
776
777 /*
778 * The interrupt line is normally shared, but after we start suspending
779 * we can't check if our device is the source of an interrupt, and can't
780 * clear it. Prevent this race by temporarily disabling the parent irq
781 * until we reach _no_irq.
782 */
783 if (cs35l56->base.irq)
784 disable_irq(cs35l56->base.irq);
785
786 return pm_runtime_force_suspend(dev);
787 }
788
cs35l56_hda_system_suspend_late(struct device * dev)789 static int cs35l56_hda_system_suspend_late(struct device *dev)
790 {
791 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
792
793 /*
794 * RESET is usually shared by all amps so it must not be asserted until
795 * all driver instances have done their suspend() stage.
796 */
797 if (cs35l56->base.reset_gpio) {
798 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
799 cs35l56_wait_min_reset_pulse();
800 }
801
802 return 0;
803 }
804
cs35l56_hda_system_suspend_no_irq(struct device * dev)805 static int cs35l56_hda_system_suspend_no_irq(struct device *dev)
806 {
807 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
808
809 /* Handlers are now disabled so the parent IRQ can safely be re-enabled. */
810 if (cs35l56->base.irq)
811 enable_irq(cs35l56->base.irq);
812
813 return 0;
814 }
815
cs35l56_hda_system_resume_no_irq(struct device * dev)816 static int cs35l56_hda_system_resume_no_irq(struct device *dev)
817 {
818 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
819
820 /*
821 * WAKE interrupts unmask if the CS35L56 hibernates, which can cause
822 * spurious interrupts, and the interrupt line is normally shared.
823 * We can't check if our device is the source of an interrupt, and can't
824 * clear it, until it has fully resumed. Prevent this race by temporarily
825 * disabling the parent irq until we complete resume().
826 */
827 if (cs35l56->base.irq)
828 disable_irq(cs35l56->base.irq);
829
830 return 0;
831 }
832
cs35l56_hda_system_resume_early(struct device * dev)833 static int cs35l56_hda_system_resume_early(struct device *dev)
834 {
835 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
836
837 /* Ensure a spec-compliant RESET pulse. */
838 if (cs35l56->base.reset_gpio) {
839 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
840 cs35l56_wait_min_reset_pulse();
841
842 /* Release shared RESET before drivers start resume(). */
843 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 1);
844 cs35l56_wait_control_port_ready();
845 }
846
847 return 0;
848 }
849
cs35l56_hda_system_resume(struct device * dev)850 static int cs35l56_hda_system_resume(struct device *dev)
851 {
852 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
853 int ret;
854
855 /* Undo pm_runtime_force_suspend() before re-enabling the irq */
856 ret = pm_runtime_force_resume(dev);
857 if (cs35l56->base.irq)
858 enable_irq(cs35l56->base.irq);
859
860 if (ret)
861 return ret;
862
863 cs35l56->suspended = false;
864
865 if (!cs35l56->codec)
866 return 0;
867
868 ret = cs35l56_is_fw_reload_needed(&cs35l56->base);
869 dev_dbg(cs35l56->base.dev, "fw_reload_needed: %d\n", ret);
870 if (ret > 0)
871 queue_work(system_long_wq, &cs35l56->dsp_work);
872
873 if (cs35l56->playing)
874 cs35l56_hda_play(cs35l56);
875
876 return 0;
877 }
878
cs35l56_hda_read_acpi(struct cs35l56_hda * cs35l56,int hid,int id)879 static int cs35l56_hda_read_acpi(struct cs35l56_hda *cs35l56, int hid, int id)
880 {
881 u32 values[HDA_MAX_COMPONENTS];
882 char hid_string[8];
883 struct acpi_device *adev;
884 const char *property, *sub;
885 size_t nval;
886 int i, ret;
887
888 /*
889 * ACPI_COMPANION isn't available when this driver was instantiated by
890 * the serial-multi-instantiate driver, so lookup the node by HID
891 */
892 if (!ACPI_COMPANION(cs35l56->base.dev)) {
893 snprintf(hid_string, sizeof(hid_string), "CSC%04X", hid);
894 adev = acpi_dev_get_first_match_dev(hid_string, NULL, -1);
895 if (!adev) {
896 dev_err(cs35l56->base.dev, "Failed to find an ACPI device for %s\n",
897 dev_name(cs35l56->base.dev));
898 return -ENODEV;
899 }
900 ACPI_COMPANION_SET(cs35l56->base.dev, adev);
901 }
902
903 property = "cirrus,dev-index";
904 ret = device_property_count_u32(cs35l56->base.dev, property);
905 if (ret <= 0)
906 goto err;
907
908 if (ret > ARRAY_SIZE(values)) {
909 ret = -EINVAL;
910 goto err;
911 }
912 nval = ret;
913
914 ret = device_property_read_u32_array(cs35l56->base.dev, property, values, nval);
915 if (ret)
916 goto err;
917
918 cs35l56->index = -1;
919 for (i = 0; i < nval; i++) {
920 if (values[i] == id) {
921 cs35l56->index = i;
922 break;
923 }
924 }
925 /*
926 * It's not an error for the ID to be missing: for I2C there can be
927 * an alias address that is not a real device. So reject silently.
928 */
929 if (cs35l56->index == -1) {
930 dev_dbg(cs35l56->base.dev, "No index found in %s\n", property);
931 ret = -ENODEV;
932 goto err;
933 }
934
935 sub = acpi_get_subsystem_id(ACPI_HANDLE(cs35l56->base.dev));
936
937 if (IS_ERR(sub)) {
938 dev_info(cs35l56->base.dev,
939 "Read ACPI _SUB failed(%ld): fallback to generic firmware\n",
940 PTR_ERR(sub));
941 } else {
942 ret = cirrus_scodec_get_speaker_id(cs35l56->base.dev, cs35l56->index, nval, -1);
943 if (ret == -ENOENT) {
944 cs35l56->system_name = sub;
945 } else if (ret >= 0) {
946 cs35l56->system_name = kasprintf(GFP_KERNEL, "%s-spkid%d", sub, ret);
947 kfree(sub);
948 if (!cs35l56->system_name)
949 return -ENOMEM;
950 } else {
951 return ret;
952 }
953 }
954
955 cs35l56->base.reset_gpio = devm_gpiod_get_index_optional(cs35l56->base.dev,
956 "reset",
957 cs35l56->index,
958 GPIOD_OUT_LOW);
959 if (IS_ERR(cs35l56->base.reset_gpio)) {
960 ret = PTR_ERR(cs35l56->base.reset_gpio);
961
962 /*
963 * If RESET is shared the first amp to probe will grab the reset
964 * line and reset all the amps
965 */
966 if (ret != -EBUSY)
967 return dev_err_probe(cs35l56->base.dev, ret, "Failed to get reset GPIO\n");
968
969 dev_info(cs35l56->base.dev, "Reset GPIO busy, assume shared reset\n");
970 cs35l56->base.reset_gpio = NULL;
971 }
972
973 return 0;
974
975 err:
976 if (ret != -ENODEV)
977 dev_err(cs35l56->base.dev, "Failed property %s: %d\n", property, ret);
978
979 return ret;
980 }
981
cs35l56_hda_common_probe(struct cs35l56_hda * cs35l56,int hid,int id)982 int cs35l56_hda_common_probe(struct cs35l56_hda *cs35l56, int hid, int id)
983 {
984 int ret;
985
986 mutex_init(&cs35l56->base.irq_lock);
987 dev_set_drvdata(cs35l56->base.dev, cs35l56);
988
989 INIT_WORK(&cs35l56->dsp_work, cs35l56_hda_dsp_work);
990
991 ret = cs35l56_hda_read_acpi(cs35l56, hid, id);
992 if (ret)
993 goto err;
994
995 cs35l56->amp_name = devm_kasprintf(cs35l56->base.dev, GFP_KERNEL, "AMP%d",
996 cs35l56->index + 1);
997 if (!cs35l56->amp_name) {
998 ret = -ENOMEM;
999 goto err;
1000 }
1001
1002 cs35l56->base.cal_index = -1;
1003
1004 cs35l56_init_cs_dsp(&cs35l56->base, &cs35l56->cs_dsp);
1005 cs35l56->cs_dsp.client_ops = &cs35l56_hda_client_ops;
1006
1007 if (cs35l56->base.reset_gpio) {
1008 dev_dbg(cs35l56->base.dev, "Hard reset\n");
1009
1010 /*
1011 * The GPIOD_OUT_LOW to *_gpiod_get_*() will be ignored if the
1012 * ACPI defines a different default state. So explicitly set low.
1013 */
1014 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
1015 cs35l56_wait_min_reset_pulse();
1016 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 1);
1017 }
1018
1019 ret = cs35l56_hw_init(&cs35l56->base);
1020 if (ret < 0)
1021 goto err;
1022
1023 /* Reset the device and wait for it to boot */
1024 cs35l56_system_reset(&cs35l56->base, false);
1025 ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
1026 if (ret)
1027 goto err;
1028
1029 regcache_cache_only(cs35l56->base.regmap, false);
1030
1031 ret = cs35l56_set_patch(&cs35l56->base);
1032 if (ret)
1033 goto err;
1034
1035 regcache_mark_dirty(cs35l56->base.regmap);
1036 regcache_sync(cs35l56->base.regmap);
1037
1038 /* Disable auto-hibernate so that runtime_pm has control */
1039 ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE);
1040 if (ret)
1041 goto err;
1042
1043 ret = cs35l56_get_calibration(&cs35l56->base);
1044 if (ret)
1045 goto err;
1046
1047 ret = cs_dsp_halo_init(&cs35l56->cs_dsp);
1048 if (ret) {
1049 dev_err_probe(cs35l56->base.dev, ret, "cs_dsp_halo_init failed\n");
1050 goto err;
1051 }
1052
1053 dev_info(cs35l56->base.dev, "DSP system name: '%s', amp name: '%s'\n",
1054 cs35l56->system_name, cs35l56->amp_name);
1055
1056 regmap_multi_reg_write(cs35l56->base.regmap, cs35l56_hda_dai_config,
1057 ARRAY_SIZE(cs35l56_hda_dai_config));
1058
1059 /*
1060 * By default only enable one ASP1TXn, where n=amplifier index,
1061 * This prevents multiple amps trying to drive the same slot.
1062 */
1063 cs35l56->asp_tx_mask = BIT(cs35l56->index);
1064
1065 pm_runtime_set_autosuspend_delay(cs35l56->base.dev, 3000);
1066 pm_runtime_use_autosuspend(cs35l56->base.dev);
1067 pm_runtime_set_active(cs35l56->base.dev);
1068 pm_runtime_mark_last_busy(cs35l56->base.dev);
1069 pm_runtime_enable(cs35l56->base.dev);
1070
1071 cs35l56->base.init_done = true;
1072
1073 ret = component_add(cs35l56->base.dev, &cs35l56_hda_comp_ops);
1074 if (ret) {
1075 dev_err(cs35l56->base.dev, "Register component failed: %d\n", ret);
1076 goto pm_err;
1077 }
1078
1079 return 0;
1080
1081 pm_err:
1082 pm_runtime_disable(cs35l56->base.dev);
1083 cs_dsp_remove(&cs35l56->cs_dsp);
1084 err:
1085 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
1086
1087 return ret;
1088 }
1089 EXPORT_SYMBOL_NS_GPL(cs35l56_hda_common_probe, "SND_HDA_SCODEC_CS35L56");
1090
cs35l56_hda_remove(struct device * dev)1091 void cs35l56_hda_remove(struct device *dev)
1092 {
1093 struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
1094
1095 component_del(cs35l56->base.dev, &cs35l56_hda_comp_ops);
1096
1097 pm_runtime_dont_use_autosuspend(cs35l56->base.dev);
1098 pm_runtime_get_sync(cs35l56->base.dev);
1099 pm_runtime_disable(cs35l56->base.dev);
1100
1101 cs_dsp_remove(&cs35l56->cs_dsp);
1102
1103 kfree(cs35l56->system_name);
1104 pm_runtime_put_noidle(cs35l56->base.dev);
1105
1106 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
1107 }
1108 EXPORT_SYMBOL_NS_GPL(cs35l56_hda_remove, "SND_HDA_SCODEC_CS35L56");
1109
1110 const struct dev_pm_ops cs35l56_hda_pm_ops = {
1111 RUNTIME_PM_OPS(cs35l56_hda_runtime_suspend, cs35l56_hda_runtime_resume, NULL)
1112 SYSTEM_SLEEP_PM_OPS(cs35l56_hda_system_suspend, cs35l56_hda_system_resume)
1113 LATE_SYSTEM_SLEEP_PM_OPS(cs35l56_hda_system_suspend_late,
1114 cs35l56_hda_system_resume_early)
1115 NOIRQ_SYSTEM_SLEEP_PM_OPS(cs35l56_hda_system_suspend_no_irq,
1116 cs35l56_hda_system_resume_no_irq)
1117 };
1118 EXPORT_SYMBOL_NS_GPL(cs35l56_hda_pm_ops, "SND_HDA_SCODEC_CS35L56");
1119
1120 MODULE_DESCRIPTION("CS35L56 HDA Driver");
1121 MODULE_IMPORT_NS("FW_CS_DSP");
1122 MODULE_IMPORT_NS("SND_HDA_CIRRUS_SCODEC");
1123 MODULE_IMPORT_NS("SND_HDA_CS_DSP_CONTROLS");
1124 MODULE_IMPORT_NS("SND_SOC_CS35L56_SHARED");
1125 MODULE_IMPORT_NS("SND_SOC_CS_AMP_LIB");
1126 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
1127 MODULE_AUTHOR("Simon Trimmer <simont@opensource.cirrus.com>");
1128 MODULE_LICENSE("GPL");
1129