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15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/slab.h>
18#include <linux/i2c.h>
19#include <linux/err.h>
20#include <linux/delay.h>
21#include <linux/mfd/core.h>
22#include <linux/of.h>
23#include <linux/of_device.h>
24#include <linux/of_gpio.h>
25#include <linux/pm_runtime.h>
26#include <linux/regmap.h>
27#include <linux/regulator/consumer.h>
28#include <linux/regulator/machine.h>
29
30#include <linux/mfd/wm8994/core.h>
31#include <linux/mfd/wm8994/pdata.h>
32#include <linux/mfd/wm8994/registers.h>
33
34#include "wm8994.h"
35
36static const struct mfd_cell wm8994_regulator_devs[] = {
37 {
38 .name = "wm8994-ldo",
39 .id = 0,
40 .pm_runtime_no_callbacks = true,
41 },
42 {
43 .name = "wm8994-ldo",
44 .id = 1,
45 .pm_runtime_no_callbacks = true,
46 },
47};
48
49static struct resource wm8994_codec_resources[] = {
50 {
51 .start = WM8994_IRQ_TEMP_SHUT,
52 .end = WM8994_IRQ_TEMP_WARN,
53 .flags = IORESOURCE_IRQ,
54 },
55};
56
57static struct resource wm8994_gpio_resources[] = {
58 {
59 .start = WM8994_IRQ_GPIO(1),
60 .end = WM8994_IRQ_GPIO(11),
61 .flags = IORESOURCE_IRQ,
62 },
63};
64
65static const struct mfd_cell wm8994_devs[] = {
66 {
67 .name = "wm8994-codec",
68 .num_resources = ARRAY_SIZE(wm8994_codec_resources),
69 .resources = wm8994_codec_resources,
70 },
71
72 {
73 .name = "wm8994-gpio",
74 .num_resources = ARRAY_SIZE(wm8994_gpio_resources),
75 .resources = wm8994_gpio_resources,
76 .pm_runtime_no_callbacks = true,
77 },
78};
79
80
81
82
83
84
85static const char *wm1811_main_supplies[] = {
86 "DBVDD1",
87 "DBVDD2",
88 "DBVDD3",
89 "DCVDD",
90 "AVDD1",
91 "AVDD2",
92 "CPVDD",
93 "SPKVDD1",
94 "SPKVDD2",
95};
96
97static const char *wm8994_main_supplies[] = {
98 "DBVDD",
99 "DCVDD",
100 "AVDD1",
101 "AVDD2",
102 "CPVDD",
103 "SPKVDD1",
104 "SPKVDD2",
105};
106
107static const char *wm8958_main_supplies[] = {
108 "DBVDD1",
109 "DBVDD2",
110 "DBVDD3",
111 "DCVDD",
112 "AVDD1",
113 "AVDD2",
114 "CPVDD",
115 "SPKVDD1",
116 "SPKVDD2",
117};
118
119#ifdef CONFIG_PM
120static int wm8994_suspend(struct device *dev)
121{
122 struct wm8994 *wm8994 = dev_get_drvdata(dev);
123 int ret;
124
125
126
127 switch (wm8994->type) {
128 case WM8958:
129 case WM1811:
130 ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
131 if (ret < 0) {
132 dev_err(dev, "Failed to read power status: %d\n", ret);
133 } else if (ret & WM8958_MICD_ENA) {
134 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
135 return 0;
136 }
137 break;
138 default:
139 break;
140 }
141
142
143
144 if (!wm8994->ldo_ena_always_driven)
145 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
146 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
147 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);
148
149
150
151
152 wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
153 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
154
155 regcache_mark_dirty(wm8994->regmap);
156
157
158
159
160 ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1,
161 WM8994_GPIO_11);
162 if (ret != 0)
163 dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
164
165
166 ret = regcache_sync_region(wm8994->regmap,
167 WM8994_INTERRUPT_STATUS_1_MASK,
168 WM8994_INTERRUPT_STATUS_1_MASK);
169 if (ret != 0)
170 dev_err(dev, "Failed to restore interrupt mask: %d\n", ret);
171
172 regcache_cache_only(wm8994->regmap, true);
173 wm8994->suspended = true;
174
175 ret = regulator_bulk_disable(wm8994->num_supplies,
176 wm8994->supplies);
177 if (ret != 0) {
178 dev_err(dev, "Failed to disable supplies: %d\n", ret);
179 return ret;
180 }
181
182 return 0;
183}
184
185static int wm8994_resume(struct device *dev)
186{
187 struct wm8994 *wm8994 = dev_get_drvdata(dev);
188 int ret;
189
190
191 if (!wm8994->suspended)
192 return 0;
193
194 ret = regulator_bulk_enable(wm8994->num_supplies,
195 wm8994->supplies);
196 if (ret != 0) {
197 dev_err(dev, "Failed to enable supplies: %d\n", ret);
198 return ret;
199 }
200
201 regcache_cache_only(wm8994->regmap, false);
202 ret = regcache_sync(wm8994->regmap);
203 if (ret != 0) {
204 dev_err(dev, "Failed to restore register map: %d\n", ret);
205 goto err_enable;
206 }
207
208
209 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
210 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
211 0);
212
213 wm8994->suspended = false;
214
215 return 0;
216
217err_enable:
218 regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
219
220 return ret;
221}
222#endif
223
224#ifdef CONFIG_REGULATOR
225static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
226{
227 struct wm8994_ldo_pdata *ldo_pdata;
228
229 if (!pdata)
230 return 0;
231
232 ldo_pdata = &pdata->ldo[ldo];
233
234 if (!ldo_pdata->init_data)
235 return 0;
236
237 return ldo_pdata->init_data->num_consumer_supplies != 0;
238}
239#else
240static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
241{
242 return 0;
243}
244#endif
245
246static const struct reg_sequence wm8994_revc_patch[] = {
247 { 0x102, 0x3 },
248 { 0x56, 0x3 },
249 { 0x817, 0x0 },
250 { 0x102, 0x0 },
251};
252
253static const struct reg_sequence wm8958_reva_patch[] = {
254 { 0x102, 0x3 },
255 { 0xcb, 0x81 },
256 { 0x817, 0x0 },
257 { 0x102, 0x0 },
258};
259
260static const struct reg_sequence wm1811_reva_patch[] = {
261 { 0x102, 0x3 },
262 { 0x56, 0xc07 },
263 { 0x5d, 0x7e },
264 { 0x5e, 0x0 },
265 { 0x102, 0x0 },
266};
267
268#ifdef CONFIG_OF
269static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
270{
271 struct device_node *np = wm8994->dev->of_node;
272 struct wm8994_pdata *pdata = &wm8994->pdata;
273 int i;
274
275 if (!np)
276 return 0;
277
278 if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults,
279 ARRAY_SIZE(pdata->gpio_defaults)) >= 0) {
280 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
281 if (wm8994->pdata.gpio_defaults[i] == 0)
282 pdata->gpio_defaults[i]
283 = WM8994_CONFIGURE_GPIO;
284 }
285 }
286
287 of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias,
288 ARRAY_SIZE(pdata->micbias));
289
290 pdata->lineout1_diff = true;
291 pdata->lineout2_diff = true;
292 if (of_find_property(np, "wlf,lineout1-se", NULL))
293 pdata->lineout1_diff = false;
294 if (of_find_property(np, "wlf,lineout2-se", NULL))
295 pdata->lineout2_diff = false;
296
297 if (of_find_property(np, "wlf,lineout1-feedback", NULL))
298 pdata->lineout1fb = true;
299 if (of_find_property(np, "wlf,lineout2-feedback", NULL))
300 pdata->lineout2fb = true;
301
302 if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
303 pdata->lineout2fb = true;
304
305 pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
306 if (pdata->ldo[0].enable < 0)
307 pdata->ldo[0].enable = 0;
308
309 pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0);
310 if (pdata->ldo[1].enable < 0)
311 pdata->ldo[1].enable = 0;
312
313 return 0;
314}
315#else
316static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
317{
318 return 0;
319}
320#endif
321
322
323
324
325static int wm8994_device_init(struct wm8994 *wm8994, int irq)
326{
327 struct wm8994_pdata *pdata;
328 struct regmap_config *regmap_config;
329 const struct reg_sequence *regmap_patch = NULL;
330 const char *devname;
331 int ret, i, patch_regs = 0;
332 int pulls = 0;
333
334 if (dev_get_platdata(wm8994->dev)) {
335 pdata = dev_get_platdata(wm8994->dev);
336 wm8994->pdata = *pdata;
337 }
338 pdata = &wm8994->pdata;
339
340 ret = wm8994_set_pdata_from_of(wm8994);
341 if (ret != 0)
342 return ret;
343
344 dev_set_drvdata(wm8994->dev, wm8994);
345
346
347 ret = mfd_add_devices(wm8994->dev, 0,
348 wm8994_regulator_devs,
349 ARRAY_SIZE(wm8994_regulator_devs),
350 NULL, 0, NULL);
351 if (ret != 0) {
352 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
353 goto err;
354 }
355
356 switch (wm8994->type) {
357 case WM1811:
358 wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
359 break;
360 case WM8994:
361 wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
362 break;
363 case WM8958:
364 wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
365 break;
366 default:
367 BUG();
368 goto err;
369 }
370
371 wm8994->supplies = devm_kzalloc(wm8994->dev,
372 sizeof(struct regulator_bulk_data) *
373 wm8994->num_supplies, GFP_KERNEL);
374 if (!wm8994->supplies) {
375 ret = -ENOMEM;
376 goto err;
377 }
378
379 switch (wm8994->type) {
380 case WM1811:
381 for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
382 wm8994->supplies[i].supply = wm1811_main_supplies[i];
383 break;
384 case WM8994:
385 for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
386 wm8994->supplies[i].supply = wm8994_main_supplies[i];
387 break;
388 case WM8958:
389 for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
390 wm8994->supplies[i].supply = wm8958_main_supplies[i];
391 break;
392 default:
393 BUG();
394 goto err;
395 }
396
397
398
399
400
401
402 ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
403 wm8994->supplies);
404 if (ret != 0) {
405 dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
406 goto err;
407 }
408
409 ret = regulator_bulk_enable(wm8994->num_supplies, wm8994->supplies);
410 if (ret != 0) {
411 dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
412 goto err_regulator_free;
413 }
414
415 ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
416 if (ret < 0) {
417 dev_err(wm8994->dev, "Failed to read ID register\n");
418 goto err_enable;
419 }
420 switch (ret) {
421 case 0x1811:
422 devname = "WM1811";
423 if (wm8994->type != WM1811)
424 dev_warn(wm8994->dev, "Device registered as type %d\n",
425 wm8994->type);
426 wm8994->type = WM1811;
427 break;
428 case 0x8994:
429 devname = "WM8994";
430 if (wm8994->type != WM8994)
431 dev_warn(wm8994->dev, "Device registered as type %d\n",
432 wm8994->type);
433 wm8994->type = WM8994;
434 break;
435 case 0x8958:
436 devname = "WM8958";
437 if (wm8994->type != WM8958)
438 dev_warn(wm8994->dev, "Device registered as type %d\n",
439 wm8994->type);
440 wm8994->type = WM8958;
441 break;
442 default:
443 dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
444 ret);
445 ret = -EINVAL;
446 goto err_enable;
447 }
448
449 ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
450 if (ret < 0) {
451 dev_err(wm8994->dev, "Failed to read revision register: %d\n",
452 ret);
453 goto err_enable;
454 }
455 wm8994->revision = ret & WM8994_CHIP_REV_MASK;
456 wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;
457
458 switch (wm8994->type) {
459 case WM8994:
460 switch (wm8994->revision) {
461 case 0:
462 case 1:
463 dev_warn(wm8994->dev,
464 "revision %c not fully supported\n",
465 'A' + wm8994->revision);
466 break;
467 case 2:
468 case 3:
469 default:
470 regmap_patch = wm8994_revc_patch;
471 patch_regs = ARRAY_SIZE(wm8994_revc_patch);
472 break;
473 }
474 break;
475
476 case WM8958:
477 switch (wm8994->revision) {
478 case 0:
479 regmap_patch = wm8958_reva_patch;
480 patch_regs = ARRAY_SIZE(wm8958_reva_patch);
481 break;
482 default:
483 break;
484 }
485 break;
486
487 case WM1811:
488
489 if (wm8994->revision > 1)
490 wm8994->revision++;
491
492 regmap_patch = wm1811_reva_patch;
493 patch_regs = ARRAY_SIZE(wm1811_reva_patch);
494 break;
495
496 default:
497 break;
498 }
499
500 dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
501 'A' + wm8994->revision, wm8994->cust_id);
502
503 switch (wm8994->type) {
504 case WM1811:
505 regmap_config = &wm1811_regmap_config;
506 break;
507 case WM8994:
508 regmap_config = &wm8994_regmap_config;
509 break;
510 case WM8958:
511 regmap_config = &wm8958_regmap_config;
512 break;
513 default:
514 dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
515 return -EINVAL;
516 }
517
518 ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
519 if (ret != 0) {
520 dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
521 ret);
522 return ret;
523 }
524
525
526
527
528
529 ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
530 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
531 if (ret != 0) {
532 dev_err(wm8994->dev, "Failed to reset device: %d\n", ret);
533 return ret;
534 }
535
536 if (regmap_patch) {
537 ret = regmap_register_patch(wm8994->regmap, regmap_patch,
538 patch_regs);
539 if (ret != 0) {
540 dev_err(wm8994->dev, "Failed to register patch: %d\n",
541 ret);
542 goto err;
543 }
544 }
545
546 wm8994->irq_base = pdata->irq_base;
547 wm8994->gpio_base = pdata->gpio_base;
548
549
550 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
551 if (pdata->gpio_defaults[i]) {
552 wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
553 0xffff, pdata->gpio_defaults[i]);
554 }
555 }
556
557 wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;
558
559 if (pdata->spkmode_pu)
560 pulls |= WM8994_SPKMODE_PU;
561
562
563 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
564 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD |
565 WM8994_SPKMODE_PU | WM8994_CSNADDR_PD,
566 pulls);
567
568
569
570
571
572
573
574 for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
575 if (wm8994_ldo_in_use(pdata, i))
576 wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
577 WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
578 else
579 wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
580 WM8994_LDO1_DISCH, 0);
581 }
582
583 wm8994_irq_init(wm8994);
584
585 ret = mfd_add_devices(wm8994->dev, -1,
586 wm8994_devs, ARRAY_SIZE(wm8994_devs),
587 NULL, 0, NULL);
588 if (ret != 0) {
589 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
590 goto err_irq;
591 }
592
593 pm_runtime_enable(wm8994->dev);
594 pm_runtime_idle(wm8994->dev);
595
596 return 0;
597
598err_irq:
599 wm8994_irq_exit(wm8994);
600err_enable:
601 regulator_bulk_disable(wm8994->num_supplies,
602 wm8994->supplies);
603err_regulator_free:
604 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
605err:
606 mfd_remove_devices(wm8994->dev);
607 return ret;
608}
609
610static void wm8994_device_exit(struct wm8994 *wm8994)
611{
612 pm_runtime_disable(wm8994->dev);
613 wm8994_irq_exit(wm8994);
614 regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
615 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
616 mfd_remove_devices(wm8994->dev);
617}
618
619static const struct of_device_id wm8994_of_match[] = {
620 { .compatible = "wlf,wm1811", .data = (void *)WM1811 },
621 { .compatible = "wlf,wm8994", .data = (void *)WM8994 },
622 { .compatible = "wlf,wm8958", .data = (void *)WM8958 },
623 { }
624};
625MODULE_DEVICE_TABLE(of, wm8994_of_match);
626
627static int wm8994_i2c_probe(struct i2c_client *i2c,
628 const struct i2c_device_id *id)
629{
630 const struct of_device_id *of_id;
631 struct wm8994 *wm8994;
632 int ret;
633
634 wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
635 if (wm8994 == NULL)
636 return -ENOMEM;
637
638 i2c_set_clientdata(i2c, wm8994);
639 wm8994->dev = &i2c->dev;
640 wm8994->irq = i2c->irq;
641
642 if (i2c->dev.of_node) {
643 of_id = of_match_device(wm8994_of_match, &i2c->dev);
644 if (of_id)
645 wm8994->type = (enum wm8994_type)of_id->data;
646 } else {
647 wm8994->type = id->driver_data;
648 }
649
650 wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
651 if (IS_ERR(wm8994->regmap)) {
652 ret = PTR_ERR(wm8994->regmap);
653 dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
654 ret);
655 return ret;
656 }
657
658 return wm8994_device_init(wm8994, i2c->irq);
659}
660
661static int wm8994_i2c_remove(struct i2c_client *i2c)
662{
663 struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
664
665 wm8994_device_exit(wm8994);
666
667 return 0;
668}
669
670static const struct i2c_device_id wm8994_i2c_id[] = {
671 { "wm1811", WM1811 },
672 { "wm1811a", WM1811 },
673 { "wm8994", WM8994 },
674 { "wm8958", WM8958 },
675 { }
676};
677MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
678
679static const struct dev_pm_ops wm8994_pm_ops = {
680 SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
681};
682
683static struct i2c_driver wm8994_i2c_driver = {
684 .driver = {
685 .name = "wm8994",
686 .pm = &wm8994_pm_ops,
687 .of_match_table = of_match_ptr(wm8994_of_match),
688 },
689 .probe = wm8994_i2c_probe,
690 .remove = wm8994_i2c_remove,
691 .id_table = wm8994_i2c_id,
692};
693
694module_i2c_driver(wm8994_i2c_driver);
695
696MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
697MODULE_LICENSE("GPL");
698MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
699
