1
2
3
4
5
6
7
8
9
10
11
12
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/delay.h>
18#include <linux/pm.h>
19#include <linux/i2c.h>
20#include <linux/platform_device.h>
21#include <linux/regulator/consumer.h>
22#include <linux/slab.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/pcm_params.h>
26#include <sound/soc.h>
27#include <sound/initval.h>
28#include <sound/tlv.h>
29
30#include "wm8741.h"
31
32#define WM8741_NUM_SUPPLIES 2
33static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
34 "AVDD",
35 "DVDD",
36};
37
38#define WM8741_NUM_RATES 6
39
40
41struct wm8741_priv {
42 enum snd_soc_control_type control_type;
43 struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
44 unsigned int sysclk;
45 struct snd_pcm_hw_constraint_list *sysclk_constraints;
46};
47
48static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = {
49 0x0000,
50 0x0000,
51 0x0000,
52 0x0000,
53 0x0000,
54 0x000A,
55 0x0000,
56 0x0000,
57 0x0002,
58 0x0000,
59 0x0002,
60};
61
62
63static int wm8741_reset(struct snd_soc_codec *codec)
64{
65 return snd_soc_write(codec, WM8741_RESET, 0);
66}
67
68static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
69static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
70
71static const struct snd_kcontrol_new wm8741_snd_controls[] = {
72SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
73 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
74SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
75 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
76};
77
78static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
79SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
80SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
81SND_SOC_DAPM_OUTPUT("VOUTLP"),
82SND_SOC_DAPM_OUTPUT("VOUTLN"),
83SND_SOC_DAPM_OUTPUT("VOUTRP"),
84SND_SOC_DAPM_OUTPUT("VOUTRN"),
85};
86
87static const struct snd_soc_dapm_route intercon[] = {
88 { "VOUTLP", NULL, "DACL" },
89 { "VOUTLN", NULL, "DACL" },
90 { "VOUTRP", NULL, "DACR" },
91 { "VOUTRN", NULL, "DACR" },
92};
93
94static int wm8741_add_widgets(struct snd_soc_codec *codec)
95{
96 struct snd_soc_dapm_context *dapm = &codec->dapm;
97
98 snd_soc_dapm_new_controls(dapm, wm8741_dapm_widgets,
99 ARRAY_SIZE(wm8741_dapm_widgets));
100 snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
101
102 return 0;
103}
104
105static struct {
106 int value;
107 int ratio;
108} lrclk_ratios[WM8741_NUM_RATES] = {
109 { 1, 128 },
110 { 2, 192 },
111 { 3, 256 },
112 { 4, 384 },
113 { 5, 512 },
114 { 6, 768 },
115};
116
117static unsigned int rates_11289[] = {
118 44100, 88235,
119};
120
121static struct snd_pcm_hw_constraint_list constraints_11289 = {
122 .count = ARRAY_SIZE(rates_11289),
123 .list = rates_11289,
124};
125
126static unsigned int rates_12288[] = {
127 32000, 48000, 96000,
128};
129
130static struct snd_pcm_hw_constraint_list constraints_12288 = {
131 .count = ARRAY_SIZE(rates_12288),
132 .list = rates_12288,
133};
134
135static unsigned int rates_16384[] = {
136 32000,
137};
138
139static struct snd_pcm_hw_constraint_list constraints_16384 = {
140 .count = ARRAY_SIZE(rates_16384),
141 .list = rates_16384,
142};
143
144static unsigned int rates_16934[] = {
145 44100, 88235,
146};
147
148static struct snd_pcm_hw_constraint_list constraints_16934 = {
149 .count = ARRAY_SIZE(rates_16934),
150 .list = rates_16934,
151};
152
153static unsigned int rates_18432[] = {
154 48000, 96000,
155};
156
157static struct snd_pcm_hw_constraint_list constraints_18432 = {
158 .count = ARRAY_SIZE(rates_18432),
159 .list = rates_18432,
160};
161
162static unsigned int rates_22579[] = {
163 44100, 88235, 1764000
164};
165
166static struct snd_pcm_hw_constraint_list constraints_22579 = {
167 .count = ARRAY_SIZE(rates_22579),
168 .list = rates_22579,
169};
170
171static unsigned int rates_24576[] = {
172 32000, 48000, 96000, 192000
173};
174
175static struct snd_pcm_hw_constraint_list constraints_24576 = {
176 .count = ARRAY_SIZE(rates_24576),
177 .list = rates_24576,
178};
179
180static unsigned int rates_36864[] = {
181 48000, 96000, 19200
182};
183
184static struct snd_pcm_hw_constraint_list constraints_36864 = {
185 .count = ARRAY_SIZE(rates_36864),
186 .list = rates_36864,
187};
188
189
190static int wm8741_startup(struct snd_pcm_substream *substream,
191 struct snd_soc_dai *dai)
192{
193 struct snd_soc_codec *codec = dai->codec;
194 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
195
196
197
198
199 if (!wm8741->sysclk) {
200 dev_err(codec->dev,
201 "No MCLK configured, call set_sysclk() on init\n");
202 return -EINVAL;
203 }
204
205 snd_pcm_hw_constraint_list(substream->runtime, 0,
206 SNDRV_PCM_HW_PARAM_RATE,
207 wm8741->sysclk_constraints);
208
209 return 0;
210}
211
212static int wm8741_hw_params(struct snd_pcm_substream *substream,
213 struct snd_pcm_hw_params *params,
214 struct snd_soc_dai *dai)
215{
216 struct snd_soc_pcm_runtime *rtd = substream->private_data;
217 struct snd_soc_codec *codec = rtd->codec;
218 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
219 u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
220 int i;
221
222
223 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
224 if (wm8741->sysclk / params_rate(params) ==
225 lrclk_ratios[i].ratio)
226 break;
227 }
228
229
230 if (i == ARRAY_SIZE(lrclk_ratios)) {
231 dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
232 wm8741->sysclk / params_rate(params));
233 return -EINVAL;
234 }
235
236
237 switch (params_format(params)) {
238 case SNDRV_PCM_FORMAT_S16_LE:
239 break;
240 case SNDRV_PCM_FORMAT_S20_3LE:
241 iface |= 0x0001;
242 break;
243 case SNDRV_PCM_FORMAT_S24_LE:
244 iface |= 0x0002;
245 break;
246 case SNDRV_PCM_FORMAT_S32_LE:
247 iface |= 0x0003;
248 break;
249 default:
250 dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
251 params_format(params));
252 return -EINVAL;
253 }
254
255 dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
256 params_format(params));
257
258 snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
259 return 0;
260}
261
262static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
263 int clk_id, unsigned int freq, int dir)
264{
265 struct snd_soc_codec *codec = codec_dai->codec;
266 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
267
268 dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
269
270 switch (freq) {
271 case 11289600:
272 wm8741->sysclk_constraints = &constraints_11289;
273 wm8741->sysclk = freq;
274 return 0;
275
276 case 12288000:
277 wm8741->sysclk_constraints = &constraints_12288;
278 wm8741->sysclk = freq;
279 return 0;
280
281 case 16384000:
282 wm8741->sysclk_constraints = &constraints_16384;
283 wm8741->sysclk = freq;
284 return 0;
285
286 case 16934400:
287 wm8741->sysclk_constraints = &constraints_16934;
288 wm8741->sysclk = freq;
289 return 0;
290
291 case 18432000:
292 wm8741->sysclk_constraints = &constraints_18432;
293 wm8741->sysclk = freq;
294 return 0;
295
296 case 22579200:
297 case 33868800:
298 wm8741->sysclk_constraints = &constraints_22579;
299 wm8741->sysclk = freq;
300 return 0;
301
302 case 24576000:
303 wm8741->sysclk_constraints = &constraints_24576;
304 wm8741->sysclk = freq;
305 return 0;
306
307 case 36864000:
308 wm8741->sysclk_constraints = &constraints_36864;
309 wm8741->sysclk = freq;
310 return 0;
311 }
312 return -EINVAL;
313}
314
315static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
316 unsigned int fmt)
317{
318 struct snd_soc_codec *codec = codec_dai->codec;
319 u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
320
321
322 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
323 case SND_SOC_DAIFMT_CBS_CFS:
324 break;
325 default:
326 return -EINVAL;
327 }
328
329
330 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
331 case SND_SOC_DAIFMT_I2S:
332 iface |= 0x0008;
333 break;
334 case SND_SOC_DAIFMT_RIGHT_J:
335 break;
336 case SND_SOC_DAIFMT_LEFT_J:
337 iface |= 0x0004;
338 break;
339 case SND_SOC_DAIFMT_DSP_A:
340 iface |= 0x0003;
341 break;
342 case SND_SOC_DAIFMT_DSP_B:
343 iface |= 0x0013;
344 break;
345 default:
346 return -EINVAL;
347 }
348
349
350 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
351 case SND_SOC_DAIFMT_NB_NF:
352 break;
353 case SND_SOC_DAIFMT_IB_IF:
354 iface |= 0x0010;
355 break;
356 case SND_SOC_DAIFMT_IB_NF:
357 iface |= 0x0020;
358 break;
359 case SND_SOC_DAIFMT_NB_IF:
360 iface |= 0x0030;
361 break;
362 default:
363 return -EINVAL;
364 }
365
366
367 dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
368 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
369 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
370
371 snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
372 return 0;
373}
374
375#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
376 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
377 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
378 SNDRV_PCM_RATE_192000)
379
380#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
381 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
382
383static struct snd_soc_dai_ops wm8741_dai_ops = {
384 .startup = wm8741_startup,
385 .hw_params = wm8741_hw_params,
386 .set_sysclk = wm8741_set_dai_sysclk,
387 .set_fmt = wm8741_set_dai_fmt,
388};
389
390static struct snd_soc_dai_driver wm8741_dai = {
391 .name = "wm8741",
392 .playback = {
393 .stream_name = "Playback",
394 .channels_min = 2,
395 .channels_max = 2,
396 .rates = WM8741_RATES,
397 .formats = WM8741_FORMATS,
398 },
399 .ops = &wm8741_dai_ops,
400};
401
402#ifdef CONFIG_PM
403static int wm8741_resume(struct snd_soc_codec *codec)
404{
405 u16 *cache = codec->reg_cache;
406 int i;
407
408
409 for (i = 0; i < WM8741_REGISTER_COUNT; i++) {
410 if (cache[i] == wm8741_reg_defaults[i] || WM8741_RESET == i)
411 continue;
412 snd_soc_write(codec, i, cache[i]);
413 }
414 return 0;
415}
416#else
417#define wm8741_suspend NULL
418#define wm8741_resume NULL
419#endif
420
421static int wm8741_probe(struct snd_soc_codec *codec)
422{
423 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
424 int ret = 0;
425
426 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type);
427 if (ret != 0) {
428 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
429 return ret;
430 }
431
432 ret = wm8741_reset(codec);
433 if (ret < 0) {
434 dev_err(codec->dev, "Failed to issue reset\n");
435 return ret;
436 }
437
438
439 snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
440 WM8741_UPDATELL, WM8741_UPDATELL);
441 snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
442 WM8741_UPDATELM, WM8741_UPDATELM);
443 snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
444 WM8741_UPDATERL, WM8741_UPDATERL);
445 snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
446 WM8741_UPDATERM, WM8741_UPDATERM);
447
448 snd_soc_add_controls(codec, wm8741_snd_controls,
449 ARRAY_SIZE(wm8741_snd_controls));
450 wm8741_add_widgets(codec);
451
452 dev_dbg(codec->dev, "Successful registration\n");
453 return ret;
454}
455
456static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
457 .probe = wm8741_probe,
458 .resume = wm8741_resume,
459 .reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults),
460 .reg_word_size = sizeof(u16),
461 .reg_cache_default = wm8741_reg_defaults,
462};
463
464#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
465static int wm8741_i2c_probe(struct i2c_client *i2c,
466 const struct i2c_device_id *id)
467{
468 struct wm8741_priv *wm8741;
469 int ret, i;
470
471 wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
472 if (wm8741 == NULL)
473 return -ENOMEM;
474
475 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
476 wm8741->supplies[i].supply = wm8741_supply_names[i];
477
478 ret = regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
479 wm8741->supplies);
480 if (ret != 0) {
481 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
482 goto err;
483 }
484
485 ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
486 wm8741->supplies);
487 if (ret != 0) {
488 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
489 goto err_get;
490 }
491
492 i2c_set_clientdata(i2c, wm8741);
493 wm8741->control_type = SND_SOC_I2C;
494
495 ret = snd_soc_register_codec(&i2c->dev,
496 &soc_codec_dev_wm8741, &wm8741_dai, 1);
497 if (ret < 0)
498 goto err_enable;
499 return ret;
500
501err_enable:
502 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
503
504err_get:
505 regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
506err:
507 kfree(wm8741);
508 return ret;
509}
510
511static int wm8741_i2c_remove(struct i2c_client *client)
512{
513 struct wm8741_priv *wm8741 = i2c_get_clientdata(client);
514
515 snd_soc_unregister_codec(&client->dev);
516 regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
517 kfree(i2c_get_clientdata(client));
518 return 0;
519}
520
521static const struct i2c_device_id wm8741_i2c_id[] = {
522 { "wm8741", 0 },
523 { }
524};
525MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
526
527static struct i2c_driver wm8741_i2c_driver = {
528 .driver = {
529 .name = "wm8741-codec",
530 .owner = THIS_MODULE,
531 },
532 .probe = wm8741_i2c_probe,
533 .remove = wm8741_i2c_remove,
534 .id_table = wm8741_i2c_id,
535};
536#endif
537
538static int __init wm8741_modinit(void)
539{
540 int ret = 0;
541
542#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
543 ret = i2c_add_driver(&wm8741_i2c_driver);
544 if (ret != 0)
545 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
546#endif
547
548 return ret;
549}
550module_init(wm8741_modinit);
551
552static void __exit wm8741_exit(void)
553{
554#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
555 i2c_del_driver(&wm8741_i2c_driver);
556#endif
557}
558module_exit(wm8741_exit);
559
560MODULE_DESCRIPTION("ASoC WM8741 driver");
561MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
562MODULE_LICENSE("GPL");
563
