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10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/pm.h>
15#include <linux/i2c.h>
16#include <linux/regmap.h>
17#include <linux/regulator/consumer.h>
18#include <linux/slab.h>
19#include <linux/of_device.h>
20#include <sound/core.h>
21#include <sound/pcm.h>
22#include <sound/pcm_params.h>
23#include <sound/soc.h>
24#include <sound/initval.h>
25#include <sound/tlv.h>
26
27#include "wm8523.h"
28
29#define WM8523_NUM_SUPPLIES 2
30static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = {
31 "AVDD",
32 "LINEVDD",
33};
34
35#define WM8523_NUM_RATES 7
36
37
38struct wm8523_priv {
39 struct regmap *regmap;
40 struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES];
41 unsigned int sysclk;
42 unsigned int rate_constraint_list[WM8523_NUM_RATES];
43 struct snd_pcm_hw_constraint_list rate_constraint;
44};
45
46static const struct reg_default wm8523_reg_defaults[] = {
47 { 2, 0x0000 },
48 { 3, 0x1812 },
49 { 4, 0x0000 },
50 { 5, 0x0001 },
51 { 6, 0x0190 },
52 { 7, 0x0190 },
53 { 8, 0x0000 },
54};
55
56static bool wm8523_volatile_register(struct device *dev, unsigned int reg)
57{
58 switch (reg) {
59 case WM8523_DEVICE_ID:
60 case WM8523_REVISION:
61 return true;
62 default:
63 return false;
64 }
65}
66
67static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0);
68
69static const char *wm8523_zd_count_text[] = {
70 "1024",
71 "2048",
72};
73
74static SOC_ENUM_SINGLE_DECL(wm8523_zc_count, WM8523_ZERO_DETECT, 0,
75 wm8523_zd_count_text);
76
77static const struct snd_kcontrol_new wm8523_controls[] = {
78SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR,
79 0, 448, 0, dac_tlv),
80SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0),
81SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0),
82SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1),
83SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0),
84SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0),
85SOC_ENUM("Zero Detect Count", wm8523_zc_count),
86};
87
88static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = {
89SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
90SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
91SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
92};
93
94static const struct snd_soc_dapm_route wm8523_dapm_routes[] = {
95 { "LINEVOUTL", NULL, "DAC" },
96 { "LINEVOUTR", NULL, "DAC" },
97};
98
99static const struct {
100 int value;
101 int ratio;
102} lrclk_ratios[WM8523_NUM_RATES] = {
103 { 1, 128 },
104 { 2, 192 },
105 { 3, 256 },
106 { 4, 384 },
107 { 5, 512 },
108 { 6, 768 },
109 { 7, 1152 },
110};
111
112static const struct {
113 int value;
114 int ratio;
115} bclk_ratios[] = {
116 { 2, 32 },
117 { 3, 64 },
118 { 4, 128 },
119};
120
121static int wm8523_startup(struct snd_pcm_substream *substream,
122 struct snd_soc_dai *dai)
123{
124 struct snd_soc_component *component = dai->component;
125 struct wm8523_priv *wm8523 = snd_soc_component_get_drvdata(component);
126
127
128
129
130 if (!wm8523->sysclk) {
131 dev_err(component->dev,
132 "No MCLK configured, call set_sysclk() on init\n");
133 return -EINVAL;
134 }
135
136 snd_pcm_hw_constraint_list(substream->runtime, 0,
137 SNDRV_PCM_HW_PARAM_RATE,
138 &wm8523->rate_constraint);
139
140 return 0;
141}
142
143static int wm8523_hw_params(struct snd_pcm_substream *substream,
144 struct snd_pcm_hw_params *params,
145 struct snd_soc_dai *dai)
146{
147 struct snd_soc_component *component = dai->component;
148 struct wm8523_priv *wm8523 = snd_soc_component_get_drvdata(component);
149 int i;
150 u16 aifctrl1 = snd_soc_component_read(component, WM8523_AIF_CTRL1);
151 u16 aifctrl2 = snd_soc_component_read(component, WM8523_AIF_CTRL2);
152
153
154 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
155 if (wm8523->sysclk / params_rate(params) ==
156 lrclk_ratios[i].ratio)
157 break;
158 }
159
160
161 if (i == ARRAY_SIZE(lrclk_ratios)) {
162 dev_err(component->dev, "MCLK/fs ratio %d unsupported\n",
163 wm8523->sysclk / params_rate(params));
164 return -EINVAL;
165 }
166
167 aifctrl2 &= ~WM8523_SR_MASK;
168 aifctrl2 |= lrclk_ratios[i].value;
169
170 if (aifctrl1 & WM8523_AIF_MSTR) {
171
172 for (i = 0; i < ARRAY_SIZE(bclk_ratios); i++)
173 if (params_width(params) * 2 <= bclk_ratios[i].ratio)
174 break;
175
176 if (i == ARRAY_SIZE(bclk_ratios)) {
177 dev_err(component->dev,
178 "No matching BCLK/fs ratio for word length %d\n",
179 params_width(params));
180 return -EINVAL;
181 }
182
183 aifctrl2 &= ~WM8523_BCLKDIV_MASK;
184 aifctrl2 |= bclk_ratios[i].value << WM8523_BCLKDIV_SHIFT;
185 }
186
187 aifctrl1 &= ~WM8523_WL_MASK;
188 switch (params_width(params)) {
189 case 16:
190 break;
191 case 20:
192 aifctrl1 |= 0x8;
193 break;
194 case 24:
195 aifctrl1 |= 0x10;
196 break;
197 case 32:
198 aifctrl1 |= 0x18;
199 break;
200 }
201
202 snd_soc_component_write(component, WM8523_AIF_CTRL1, aifctrl1);
203 snd_soc_component_write(component, WM8523_AIF_CTRL2, aifctrl2);
204
205 return 0;
206}
207
208static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai,
209 int clk_id, unsigned int freq, int dir)
210{
211 struct snd_soc_component *component = codec_dai->component;
212 struct wm8523_priv *wm8523 = snd_soc_component_get_drvdata(component);
213 unsigned int val;
214 int i;
215
216 wm8523->sysclk = freq;
217
218 wm8523->rate_constraint.count = 0;
219 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
220 val = freq / lrclk_ratios[i].ratio;
221
222
223
224
225 switch (val) {
226 case 8000:
227 case 11025:
228 case 16000:
229 case 22050:
230 case 32000:
231 case 44100:
232 case 48000:
233 case 64000:
234 case 88200:
235 case 96000:
236 case 176400:
237 case 192000:
238 dev_dbg(component->dev, "Supported sample rate: %dHz\n",
239 val);
240 wm8523->rate_constraint_list[i] = val;
241 wm8523->rate_constraint.count++;
242 break;
243 default:
244 dev_dbg(component->dev, "Skipping sample rate: %dHz\n",
245 val);
246 }
247 }
248
249
250 if (wm8523->rate_constraint.count == 0)
251 return -EINVAL;
252
253 return 0;
254}
255
256
257static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai,
258 unsigned int fmt)
259{
260 struct snd_soc_component *component = codec_dai->component;
261 u16 aifctrl1 = snd_soc_component_read(component, WM8523_AIF_CTRL1);
262
263 aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK |
264 WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK);
265
266 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
267 case SND_SOC_DAIFMT_CBM_CFM:
268 aifctrl1 |= WM8523_AIF_MSTR;
269 break;
270 case SND_SOC_DAIFMT_CBS_CFS:
271 break;
272 default:
273 return -EINVAL;
274 }
275
276 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
277 case SND_SOC_DAIFMT_I2S:
278 aifctrl1 |= 0x0002;
279 break;
280 case SND_SOC_DAIFMT_RIGHT_J:
281 break;
282 case SND_SOC_DAIFMT_LEFT_J:
283 aifctrl1 |= 0x0001;
284 break;
285 case SND_SOC_DAIFMT_DSP_A:
286 aifctrl1 |= 0x0003;
287 break;
288 case SND_SOC_DAIFMT_DSP_B:
289 aifctrl1 |= 0x0023;
290 break;
291 default:
292 return -EINVAL;
293 }
294
295 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
296 case SND_SOC_DAIFMT_NB_NF:
297 break;
298 case SND_SOC_DAIFMT_IB_IF:
299 aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV;
300 break;
301 case SND_SOC_DAIFMT_IB_NF:
302 aifctrl1 |= WM8523_BCLK_INV;
303 break;
304 case SND_SOC_DAIFMT_NB_IF:
305 aifctrl1 |= WM8523_LRCLK_INV;
306 break;
307 default:
308 return -EINVAL;
309 }
310
311 snd_soc_component_write(component, WM8523_AIF_CTRL1, aifctrl1);
312
313 return 0;
314}
315
316static int wm8523_set_bias_level(struct snd_soc_component *component,
317 enum snd_soc_bias_level level)
318{
319 struct wm8523_priv *wm8523 = snd_soc_component_get_drvdata(component);
320 int ret;
321
322 switch (level) {
323 case SND_SOC_BIAS_ON:
324 break;
325
326 case SND_SOC_BIAS_PREPARE:
327
328 snd_soc_component_update_bits(component, WM8523_PSCTRL1,
329 WM8523_SYS_ENA_MASK, 3);
330 break;
331
332 case SND_SOC_BIAS_STANDBY:
333 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
334 ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
335 wm8523->supplies);
336 if (ret != 0) {
337 dev_err(component->dev,
338 "Failed to enable supplies: %d\n",
339 ret);
340 return ret;
341 }
342
343
344 regcache_sync(wm8523->regmap);
345
346
347 snd_soc_component_update_bits(component, WM8523_PSCTRL1,
348 WM8523_SYS_ENA_MASK, 1);
349
350 msleep(100);
351 }
352
353
354 snd_soc_component_update_bits(component, WM8523_PSCTRL1,
355 WM8523_SYS_ENA_MASK, 2);
356
357 break;
358
359 case SND_SOC_BIAS_OFF:
360
361 snd_soc_component_update_bits(component, WM8523_PSCTRL1,
362 WM8523_SYS_ENA_MASK, 0);
363 msleep(100);
364
365 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies),
366 wm8523->supplies);
367 break;
368 }
369 return 0;
370}
371
372#define WM8523_RATES SNDRV_PCM_RATE_8000_192000
373
374#define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
375 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
376
377static const struct snd_soc_dai_ops wm8523_dai_ops = {
378 .startup = wm8523_startup,
379 .hw_params = wm8523_hw_params,
380 .set_sysclk = wm8523_set_dai_sysclk,
381 .set_fmt = wm8523_set_dai_fmt,
382};
383
384static struct snd_soc_dai_driver wm8523_dai = {
385 .name = "wm8523-hifi",
386 .playback = {
387 .stream_name = "Playback",
388 .channels_min = 2,
389 .channels_max = 2,
390 .rates = WM8523_RATES,
391 .formats = WM8523_FORMATS,
392 },
393 .ops = &wm8523_dai_ops,
394};
395
396static int wm8523_probe(struct snd_soc_component *component)
397{
398 struct wm8523_priv *wm8523 = snd_soc_component_get_drvdata(component);
399
400 wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0];
401 wm8523->rate_constraint.count =
402 ARRAY_SIZE(wm8523->rate_constraint_list);
403
404
405 snd_soc_component_update_bits(component, WM8523_DAC_GAINR,
406 WM8523_DACR_VU, WM8523_DACR_VU);
407 snd_soc_component_update_bits(component, WM8523_DAC_CTRL3, WM8523_ZC, WM8523_ZC);
408
409 return 0;
410}
411
412static const struct snd_soc_component_driver soc_component_dev_wm8523 = {
413 .probe = wm8523_probe,
414 .set_bias_level = wm8523_set_bias_level,
415 .controls = wm8523_controls,
416 .num_controls = ARRAY_SIZE(wm8523_controls),
417 .dapm_widgets = wm8523_dapm_widgets,
418 .num_dapm_widgets = ARRAY_SIZE(wm8523_dapm_widgets),
419 .dapm_routes = wm8523_dapm_routes,
420 .num_dapm_routes = ARRAY_SIZE(wm8523_dapm_routes),
421 .suspend_bias_off = 1,
422 .idle_bias_on = 1,
423 .use_pmdown_time = 1,
424 .endianness = 1,
425 .non_legacy_dai_naming = 1,
426};
427
428static const struct of_device_id wm8523_of_match[] = {
429 { .compatible = "wlf,wm8523" },
430 { },
431};
432MODULE_DEVICE_TABLE(of, wm8523_of_match);
433
434static const struct regmap_config wm8523_regmap = {
435 .reg_bits = 8,
436 .val_bits = 16,
437 .max_register = WM8523_ZERO_DETECT,
438
439 .reg_defaults = wm8523_reg_defaults,
440 .num_reg_defaults = ARRAY_SIZE(wm8523_reg_defaults),
441 .cache_type = REGCACHE_RBTREE,
442
443 .volatile_reg = wm8523_volatile_register,
444};
445
446static int wm8523_i2c_probe(struct i2c_client *i2c,
447 const struct i2c_device_id *id)
448{
449 struct wm8523_priv *wm8523;
450 unsigned int val;
451 int ret, i;
452
453 wm8523 = devm_kzalloc(&i2c->dev, sizeof(struct wm8523_priv),
454 GFP_KERNEL);
455 if (wm8523 == NULL)
456 return -ENOMEM;
457
458 wm8523->regmap = devm_regmap_init_i2c(i2c, &wm8523_regmap);
459 if (IS_ERR(wm8523->regmap)) {
460 ret = PTR_ERR(wm8523->regmap);
461 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
462 return ret;
463 }
464
465 for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++)
466 wm8523->supplies[i].supply = wm8523_supply_names[i];
467
468 ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8523->supplies),
469 wm8523->supplies);
470 if (ret != 0) {
471 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
472 return ret;
473 }
474
475 ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
476 wm8523->supplies);
477 if (ret != 0) {
478 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
479 return ret;
480 }
481
482 ret = regmap_read(wm8523->regmap, WM8523_DEVICE_ID, &val);
483 if (ret < 0) {
484 dev_err(&i2c->dev, "Failed to read ID register\n");
485 goto err_enable;
486 }
487 if (val != 0x8523) {
488 dev_err(&i2c->dev, "Device is not a WM8523, ID is %x\n", ret);
489 ret = -EINVAL;
490 goto err_enable;
491 }
492
493 ret = regmap_read(wm8523->regmap, WM8523_REVISION, &val);
494 if (ret < 0) {
495 dev_err(&i2c->dev, "Failed to read revision register\n");
496 goto err_enable;
497 }
498 dev_info(&i2c->dev, "revision %c\n",
499 (val & WM8523_CHIP_REV_MASK) + 'A');
500
501 ret = regmap_write(wm8523->regmap, WM8523_DEVICE_ID, 0x8523);
502 if (ret != 0) {
503 dev_err(&i2c->dev, "Failed to reset device: %d\n", ret);
504 goto err_enable;
505 }
506
507 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
508
509 i2c_set_clientdata(i2c, wm8523);
510
511 ret = devm_snd_soc_register_component(&i2c->dev,
512 &soc_component_dev_wm8523, &wm8523_dai, 1);
513
514 return ret;
515
516err_enable:
517 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
518 return ret;
519}
520
521static const struct i2c_device_id wm8523_i2c_id[] = {
522 { "wm8523", 0 },
523 { }
524};
525MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id);
526
527static struct i2c_driver wm8523_i2c_driver = {
528 .driver = {
529 .name = "wm8523",
530 .of_match_table = wm8523_of_match,
531 },
532 .probe = wm8523_i2c_probe,
533 .id_table = wm8523_i2c_id,
534};
535
536module_i2c_driver(wm8523_i2c_driver);
537
538MODULE_DESCRIPTION("ASoC WM8523 driver");
539MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
540MODULE_LICENSE("GPL");
541
