Loading...
1/*
2 * wm8994-core.c -- Device access for Wolfson WM8994
3 *
4 * Copyright 2009 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/slab.h>
18#include <linux/i2c.h>
19#include <linux/delay.h>
20#include <linux/mfd/core.h>
21#include <linux/pm_runtime.h>
22#include <linux/regulator/consumer.h>
23#include <linux/regulator/machine.h>
24
25#include <linux/mfd/wm8994/core.h>
26#include <linux/mfd/wm8994/pdata.h>
27#include <linux/mfd/wm8994/registers.h>
28
29static int wm8994_read(struct wm8994 *wm8994, unsigned short reg,
30 int bytes, void *dest)
31{
32 int ret, i;
33 u16 *buf = dest;
34
35 BUG_ON(bytes % 2);
36 BUG_ON(bytes <= 0);
37
38 ret = wm8994->read_dev(wm8994, reg, bytes, dest);
39 if (ret < 0)
40 return ret;
41
42 for (i = 0; i < bytes / 2; i++) {
43 dev_vdbg(wm8994->dev, "Read %04x from R%d(0x%x)\n",
44 be16_to_cpu(buf[i]), reg + i, reg + i);
45 }
46
47 return 0;
48}
49
50/**
51 * wm8994_reg_read: Read a single WM8994 register.
52 *
53 * @wm8994: Device to read from.
54 * @reg: Register to read.
55 */
56int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg)
57{
58 unsigned short val;
59 int ret;
60
61 mutex_lock(&wm8994->io_lock);
62
63 ret = wm8994_read(wm8994, reg, 2, &val);
64
65 mutex_unlock(&wm8994->io_lock);
66
67 if (ret < 0)
68 return ret;
69 else
70 return be16_to_cpu(val);
71}
72EXPORT_SYMBOL_GPL(wm8994_reg_read);
73
74/**
75 * wm8994_bulk_read: Read multiple WM8994 registers
76 *
77 * @wm8994: Device to read from
78 * @reg: First register
79 * @count: Number of registers
80 * @buf: Buffer to fill. The data will be returned big endian.
81 */
82int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
83 int count, u16 *buf)
84{
85 int ret;
86
87 mutex_lock(&wm8994->io_lock);
88
89 ret = wm8994_read(wm8994, reg, count * 2, buf);
90
91 mutex_unlock(&wm8994->io_lock);
92
93 return ret;
94}
95EXPORT_SYMBOL_GPL(wm8994_bulk_read);
96
97static int wm8994_write(struct wm8994 *wm8994, unsigned short reg,
98 int bytes, const void *src)
99{
100 const u16 *buf = src;
101 int i;
102
103 BUG_ON(bytes % 2);
104 BUG_ON(bytes <= 0);
105
106 for (i = 0; i < bytes / 2; i++) {
107 dev_vdbg(wm8994->dev, "Write %04x to R%d(0x%x)\n",
108 be16_to_cpu(buf[i]), reg + i, reg + i);
109 }
110
111 return wm8994->write_dev(wm8994, reg, bytes, src);
112}
113
114/**
115 * wm8994_reg_write: Write a single WM8994 register.
116 *
117 * @wm8994: Device to write to.
118 * @reg: Register to write to.
119 * @val: Value to write.
120 */
121int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
122 unsigned short val)
123{
124 int ret;
125
126 val = cpu_to_be16(val);
127
128 mutex_lock(&wm8994->io_lock);
129
130 ret = wm8994_write(wm8994, reg, 2, &val);
131
132 mutex_unlock(&wm8994->io_lock);
133
134 return ret;
135}
136EXPORT_SYMBOL_GPL(wm8994_reg_write);
137
138/**
139 * wm8994_bulk_write: Write multiple WM8994 registers
140 *
141 * @wm8994: Device to write to
142 * @reg: First register
143 * @count: Number of registers
144 * @buf: Buffer to write from. Data must be big-endian formatted.
145 */
146int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
147 int count, const u16 *buf)
148{
149 int ret;
150
151 mutex_lock(&wm8994->io_lock);
152
153 ret = wm8994_write(wm8994, reg, count * 2, buf);
154
155 mutex_unlock(&wm8994->io_lock);
156
157 return ret;
158}
159EXPORT_SYMBOL_GPL(wm8994_bulk_write);
160
161/**
162 * wm8994_set_bits: Set the value of a bitfield in a WM8994 register
163 *
164 * @wm8994: Device to write to.
165 * @reg: Register to write to.
166 * @mask: Mask of bits to set.
167 * @val: Value to set (unshifted)
168 */
169int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
170 unsigned short mask, unsigned short val)
171{
172 int ret;
173 u16 r;
174
175 mutex_lock(&wm8994->io_lock);
176
177 ret = wm8994_read(wm8994, reg, 2, &r);
178 if (ret < 0)
179 goto out;
180
181 r = be16_to_cpu(r);
182
183 r &= ~mask;
184 r |= val;
185
186 r = cpu_to_be16(r);
187
188 ret = wm8994_write(wm8994, reg, 2, &r);
189
190out:
191 mutex_unlock(&wm8994->io_lock);
192
193 return ret;
194}
195EXPORT_SYMBOL_GPL(wm8994_set_bits);
196
197static struct mfd_cell wm8994_regulator_devs[] = {
198 {
199 .name = "wm8994-ldo",
200 .id = 1,
201 .pm_runtime_no_callbacks = true,
202 },
203 {
204 .name = "wm8994-ldo",
205 .id = 2,
206 .pm_runtime_no_callbacks = true,
207 },
208};
209
210static struct resource wm8994_codec_resources[] = {
211 {
212 .start = WM8994_IRQ_TEMP_SHUT,
213 .end = WM8994_IRQ_TEMP_WARN,
214 .flags = IORESOURCE_IRQ,
215 },
216};
217
218static struct resource wm8994_gpio_resources[] = {
219 {
220 .start = WM8994_IRQ_GPIO(1),
221 .end = WM8994_IRQ_GPIO(11),
222 .flags = IORESOURCE_IRQ,
223 },
224};
225
226static struct mfd_cell wm8994_devs[] = {
227 {
228 .name = "wm8994-codec",
229 .num_resources = ARRAY_SIZE(wm8994_codec_resources),
230 .resources = wm8994_codec_resources,
231 },
232
233 {
234 .name = "wm8994-gpio",
235 .num_resources = ARRAY_SIZE(wm8994_gpio_resources),
236 .resources = wm8994_gpio_resources,
237 .pm_runtime_no_callbacks = true,
238 },
239};
240
241/*
242 * Supplies for the main bulk of CODEC; the LDO supplies are ignored
243 * and should be handled via the standard regulator API supply
244 * management.
245 */
246static const char *wm8994_main_supplies[] = {
247 "DBVDD",
248 "DCVDD",
249 "AVDD1",
250 "AVDD2",
251 "CPVDD",
252 "SPKVDD1",
253 "SPKVDD2",
254};
255
256static const char *wm8958_main_supplies[] = {
257 "DBVDD1",
258 "DBVDD2",
259 "DBVDD3",
260 "DCVDD",
261 "AVDD1",
262 "AVDD2",
263 "CPVDD",
264 "SPKVDD1",
265 "SPKVDD2",
266};
267
268#ifdef CONFIG_PM
269static int wm8994_suspend(struct device *dev)
270{
271 struct wm8994 *wm8994 = dev_get_drvdata(dev);
272 int ret;
273
274 /* Don't actually go through with the suspend if the CODEC is
275 * still active (eg, for audio passthrough from CP. */
276 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1);
277 if (ret < 0) {
278 dev_err(dev, "Failed to read power status: %d\n", ret);
279 } else if (ret & WM8994_VMID_SEL_MASK) {
280 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
281 return 0;
282 }
283
284 /* GPIO configuration state is saved here since we may be configuring
285 * the GPIO alternate functions even if we're not using the gpiolib
286 * driver for them.
287 */
288 ret = wm8994_read(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2,
289 &wm8994->gpio_regs);
290 if (ret < 0)
291 dev_err(dev, "Failed to save GPIO registers: %d\n", ret);
292
293 /* For similar reasons we also stash the regulator states */
294 ret = wm8994_read(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2,
295 &wm8994->ldo_regs);
296 if (ret < 0)
297 dev_err(dev, "Failed to save LDO registers: %d\n", ret);
298
299 /* Explicitly put the device into reset in case regulators
300 * don't get disabled in order to ensure consistent restart.
301 */
302 wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 0x8994);
303
304 wm8994->suspended = true;
305
306 ret = regulator_bulk_disable(wm8994->num_supplies,
307 wm8994->supplies);
308 if (ret != 0) {
309 dev_err(dev, "Failed to disable supplies: %d\n", ret);
310 return ret;
311 }
312
313 return 0;
314}
315
316static int wm8994_resume(struct device *dev)
317{
318 struct wm8994 *wm8994 = dev_get_drvdata(dev);
319 int ret, i;
320
321 /* We may have lied to the PM core about suspending */
322 if (!wm8994->suspended)
323 return 0;
324
325 ret = regulator_bulk_enable(wm8994->num_supplies,
326 wm8994->supplies);
327 if (ret != 0) {
328 dev_err(dev, "Failed to enable supplies: %d\n", ret);
329 return ret;
330 }
331
332 /* Write register at a time as we use the cache on the CPU so store
333 * it in native endian.
334 */
335 for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
336 ret = wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK
337 + i, wm8994->irq_masks_cur[i]);
338 if (ret < 0)
339 dev_err(dev, "Failed to restore interrupt masks: %d\n",
340 ret);
341 }
342
343 ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2,
344 &wm8994->ldo_regs);
345 if (ret < 0)
346 dev_err(dev, "Failed to restore LDO registers: %d\n", ret);
347
348 ret = wm8994_write(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2,
349 &wm8994->gpio_regs);
350 if (ret < 0)
351 dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
352
353 wm8994->suspended = false;
354
355 return 0;
356}
357#endif
358
359#ifdef CONFIG_REGULATOR
360static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
361{
362 struct wm8994_ldo_pdata *ldo_pdata;
363
364 if (!pdata)
365 return 0;
366
367 ldo_pdata = &pdata->ldo[ldo];
368
369 if (!ldo_pdata->init_data)
370 return 0;
371
372 return ldo_pdata->init_data->num_consumer_supplies != 0;
373}
374#else
375static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
376{
377 return 0;
378}
379#endif
380
381/*
382 * Instantiate the generic non-control parts of the device.
383 */
384static int wm8994_device_init(struct wm8994 *wm8994, int irq)
385{
386 struct wm8994_pdata *pdata = wm8994->dev->platform_data;
387 const char *devname;
388 int ret, i;
389
390 mutex_init(&wm8994->io_lock);
391 dev_set_drvdata(wm8994->dev, wm8994);
392
393 /* Add the on-chip regulators first for bootstrapping */
394 ret = mfd_add_devices(wm8994->dev, -1,
395 wm8994_regulator_devs,
396 ARRAY_SIZE(wm8994_regulator_devs),
397 NULL, 0);
398 if (ret != 0) {
399 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
400 goto err;
401 }
402
403 switch (wm8994->type) {
404 case WM8994:
405 wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
406 break;
407 case WM8958:
408 wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
409 break;
410 default:
411 BUG();
412 goto err;
413 }
414
415 wm8994->supplies = kzalloc(sizeof(struct regulator_bulk_data) *
416 wm8994->num_supplies,
417 GFP_KERNEL);
418 if (!wm8994->supplies) {
419 ret = -ENOMEM;
420 goto err;
421 }
422
423 switch (wm8994->type) {
424 case WM8994:
425 for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
426 wm8994->supplies[i].supply = wm8994_main_supplies[i];
427 break;
428 case WM8958:
429 for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
430 wm8994->supplies[i].supply = wm8958_main_supplies[i];
431 break;
432 default:
433 BUG();
434 goto err;
435 }
436
437 ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
438 wm8994->supplies);
439 if (ret != 0) {
440 dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
441 goto err_supplies;
442 }
443
444 ret = regulator_bulk_enable(wm8994->num_supplies,
445 wm8994->supplies);
446 if (ret != 0) {
447 dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
448 goto err_get;
449 }
450
451 ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
452 if (ret < 0) {
453 dev_err(wm8994->dev, "Failed to read ID register\n");
454 goto err_enable;
455 }
456 switch (ret) {
457 case 0x8994:
458 devname = "WM8994";
459 if (wm8994->type != WM8994)
460 dev_warn(wm8994->dev, "Device registered as type %d\n",
461 wm8994->type);
462 wm8994->type = WM8994;
463 break;
464 case 0x8958:
465 devname = "WM8958";
466 if (wm8994->type != WM8958)
467 dev_warn(wm8994->dev, "Device registered as type %d\n",
468 wm8994->type);
469 wm8994->type = WM8958;
470 break;
471 default:
472 dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
473 ret);
474 ret = -EINVAL;
475 goto err_enable;
476 }
477
478 ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
479 if (ret < 0) {
480 dev_err(wm8994->dev, "Failed to read revision register: %d\n",
481 ret);
482 goto err_enable;
483 }
484
485 switch (wm8994->type) {
486 case WM8994:
487 switch (ret) {
488 case 0:
489 case 1:
490 dev_warn(wm8994->dev,
491 "revision %c not fully supported\n",
492 'A' + ret);
493 break;
494 default:
495 break;
496 }
497 break;
498 default:
499 break;
500 }
501
502 dev_info(wm8994->dev, "%s revision %c\n", devname, 'A' + ret);
503
504 if (pdata) {
505 wm8994->irq_base = pdata->irq_base;
506 wm8994->gpio_base = pdata->gpio_base;
507
508 /* GPIO configuration is only applied if it's non-zero */
509 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
510 if (pdata->gpio_defaults[i]) {
511 wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
512 0xffff,
513 pdata->gpio_defaults[i]);
514 }
515 }
516 }
517
518 /* In some system designs where the regulators are not in use,
519 * we can achieve a small reduction in leakage currents by
520 * floating LDO outputs. This bit makes no difference if the
521 * LDOs are enabled, it only affects cases where the LDOs were
522 * in operation and are then disabled.
523 */
524 for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
525 if (wm8994_ldo_in_use(pdata, i))
526 wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
527 WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
528 else
529 wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
530 WM8994_LDO1_DISCH, 0);
531 }
532
533 wm8994_irq_init(wm8994);
534
535 ret = mfd_add_devices(wm8994->dev, -1,
536 wm8994_devs, ARRAY_SIZE(wm8994_devs),
537 NULL, 0);
538 if (ret != 0) {
539 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
540 goto err_irq;
541 }
542
543 pm_runtime_enable(wm8994->dev);
544 pm_runtime_resume(wm8994->dev);
545
546 return 0;
547
548err_irq:
549 wm8994_irq_exit(wm8994);
550err_enable:
551 regulator_bulk_disable(wm8994->num_supplies,
552 wm8994->supplies);
553err_get:
554 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
555err_supplies:
556 kfree(wm8994->supplies);
557err:
558 mfd_remove_devices(wm8994->dev);
559 kfree(wm8994);
560 return ret;
561}
562
563static void wm8994_device_exit(struct wm8994 *wm8994)
564{
565 pm_runtime_disable(wm8994->dev);
566 mfd_remove_devices(wm8994->dev);
567 wm8994_irq_exit(wm8994);
568 regulator_bulk_disable(wm8994->num_supplies,
569 wm8994->supplies);
570 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
571 kfree(wm8994->supplies);
572 kfree(wm8994);
573}
574
575static int wm8994_i2c_read_device(struct wm8994 *wm8994, unsigned short reg,
576 int bytes, void *dest)
577{
578 struct i2c_client *i2c = wm8994->control_data;
579 int ret;
580 u16 r = cpu_to_be16(reg);
581
582 ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
583 if (ret < 0)
584 return ret;
585 if (ret != 2)
586 return -EIO;
587
588 ret = i2c_master_recv(i2c, dest, bytes);
589 if (ret < 0)
590 return ret;
591 if (ret != bytes)
592 return -EIO;
593 return 0;
594}
595
596static int wm8994_i2c_write_device(struct wm8994 *wm8994, unsigned short reg,
597 int bytes, const void *src)
598{
599 struct i2c_client *i2c = wm8994->control_data;
600 struct i2c_msg xfer[2];
601 int ret;
602
603 reg = cpu_to_be16(reg);
604
605 xfer[0].addr = i2c->addr;
606 xfer[0].flags = 0;
607 xfer[0].len = 2;
608 xfer[0].buf = (char *)®
609
610 xfer[1].addr = i2c->addr;
611 xfer[1].flags = I2C_M_NOSTART;
612 xfer[1].len = bytes;
613 xfer[1].buf = (char *)src;
614
615 ret = i2c_transfer(i2c->adapter, xfer, 2);
616 if (ret < 0)
617 return ret;
618 if (ret != 2)
619 return -EIO;
620
621 return 0;
622}
623
624static int wm8994_i2c_probe(struct i2c_client *i2c,
625 const struct i2c_device_id *id)
626{
627 struct wm8994 *wm8994;
628
629 wm8994 = kzalloc(sizeof(struct wm8994), GFP_KERNEL);
630 if (wm8994 == NULL)
631 return -ENOMEM;
632
633 i2c_set_clientdata(i2c, wm8994);
634 wm8994->dev = &i2c->dev;
635 wm8994->control_data = i2c;
636 wm8994->read_dev = wm8994_i2c_read_device;
637 wm8994->write_dev = wm8994_i2c_write_device;
638 wm8994->irq = i2c->irq;
639 wm8994->type = id->driver_data;
640
641 return wm8994_device_init(wm8994, i2c->irq);
642}
643
644static int wm8994_i2c_remove(struct i2c_client *i2c)
645{
646 struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
647
648 wm8994_device_exit(wm8994);
649
650 return 0;
651}
652
653static const struct i2c_device_id wm8994_i2c_id[] = {
654 { "wm8994", WM8994 },
655 { "wm8958", WM8958 },
656 { }
657};
658MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
659
660static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume,
661 NULL);
662
663static struct i2c_driver wm8994_i2c_driver = {
664 .driver = {
665 .name = "wm8994",
666 .owner = THIS_MODULE,
667 .pm = &wm8994_pm_ops,
668 },
669 .probe = wm8994_i2c_probe,
670 .remove = wm8994_i2c_remove,
671 .id_table = wm8994_i2c_id,
672};
673
674static int __init wm8994_i2c_init(void)
675{
676 int ret;
677
678 ret = i2c_add_driver(&wm8994_i2c_driver);
679 if (ret != 0)
680 pr_err("Failed to register wm8994 I2C driver: %d\n", ret);
681
682 return ret;
683}
684module_init(wm8994_i2c_init);
685
686static void __exit wm8994_i2c_exit(void)
687{
688 i2c_del_driver(&wm8994_i2c_driver);
689}
690module_exit(wm8994_i2c_exit);
691
692MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
693MODULE_LICENSE("GPL");
694MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1/*
2 * wm8994-core.c -- Device access for Wolfson WM8994
3 *
4 * Copyright 2009 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
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/pm_runtime.h>
23#include <linux/regmap.h>
24#include <linux/regulator/consumer.h>
25#include <linux/regulator/machine.h>
26
27#include <linux/mfd/wm8994/core.h>
28#include <linux/mfd/wm8994/pdata.h>
29#include <linux/mfd/wm8994/registers.h>
30
31#include "wm8994.h"
32
33/**
34 * wm8994_reg_read: Read a single WM8994 register.
35 *
36 * @wm8994: Device to read from.
37 * @reg: Register to read.
38 */
39int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg)
40{
41 unsigned int val;
42 int ret;
43
44 ret = regmap_read(wm8994->regmap, reg, &val);
45
46 if (ret < 0)
47 return ret;
48 else
49 return val;
50}
51EXPORT_SYMBOL_GPL(wm8994_reg_read);
52
53/**
54 * wm8994_bulk_read: Read multiple WM8994 registers
55 *
56 * @wm8994: Device to read from
57 * @reg: First register
58 * @count: Number of registers
59 * @buf: Buffer to fill. The data will be returned big endian.
60 */
61int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
62 int count, u16 *buf)
63{
64 return regmap_bulk_read(wm8994->regmap, reg, buf, count);
65}
66
67/**
68 * wm8994_reg_write: Write a single WM8994 register.
69 *
70 * @wm8994: Device to write to.
71 * @reg: Register to write to.
72 * @val: Value to write.
73 */
74int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
75 unsigned short val)
76{
77 return regmap_write(wm8994->regmap, reg, val);
78}
79EXPORT_SYMBOL_GPL(wm8994_reg_write);
80
81/**
82 * wm8994_bulk_write: Write multiple WM8994 registers
83 *
84 * @wm8994: Device to write to
85 * @reg: First register
86 * @count: Number of registers
87 * @buf: Buffer to write from. Data must be big-endian formatted.
88 */
89int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
90 int count, const u16 *buf)
91{
92 return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16));
93}
94EXPORT_SYMBOL_GPL(wm8994_bulk_write);
95
96/**
97 * wm8994_set_bits: Set the value of a bitfield in a WM8994 register
98 *
99 * @wm8994: Device to write to.
100 * @reg: Register to write to.
101 * @mask: Mask of bits to set.
102 * @val: Value to set (unshifted)
103 */
104int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
105 unsigned short mask, unsigned short val)
106{
107 return regmap_update_bits(wm8994->regmap, reg, mask, val);
108}
109EXPORT_SYMBOL_GPL(wm8994_set_bits);
110
111static struct mfd_cell wm8994_regulator_devs[] = {
112 {
113 .name = "wm8994-ldo",
114 .id = 1,
115 .pm_runtime_no_callbacks = true,
116 },
117 {
118 .name = "wm8994-ldo",
119 .id = 2,
120 .pm_runtime_no_callbacks = true,
121 },
122};
123
124static struct resource wm8994_codec_resources[] = {
125 {
126 .start = WM8994_IRQ_TEMP_SHUT,
127 .end = WM8994_IRQ_TEMP_WARN,
128 .flags = IORESOURCE_IRQ,
129 },
130};
131
132static struct resource wm8994_gpio_resources[] = {
133 {
134 .start = WM8994_IRQ_GPIO(1),
135 .end = WM8994_IRQ_GPIO(11),
136 .flags = IORESOURCE_IRQ,
137 },
138};
139
140static struct mfd_cell wm8994_devs[] = {
141 {
142 .name = "wm8994-codec",
143 .num_resources = ARRAY_SIZE(wm8994_codec_resources),
144 .resources = wm8994_codec_resources,
145 },
146
147 {
148 .name = "wm8994-gpio",
149 .num_resources = ARRAY_SIZE(wm8994_gpio_resources),
150 .resources = wm8994_gpio_resources,
151 .pm_runtime_no_callbacks = true,
152 },
153};
154
155/*
156 * Supplies for the main bulk of CODEC; the LDO supplies are ignored
157 * and should be handled via the standard regulator API supply
158 * management.
159 */
160static const char *wm1811_main_supplies[] = {
161 "DBVDD1",
162 "DBVDD2",
163 "DBVDD3",
164 "DCVDD",
165 "AVDD1",
166 "AVDD2",
167 "CPVDD",
168 "SPKVDD1",
169 "SPKVDD2",
170};
171
172static const char *wm8994_main_supplies[] = {
173 "DBVDD",
174 "DCVDD",
175 "AVDD1",
176 "AVDD2",
177 "CPVDD",
178 "SPKVDD1",
179 "SPKVDD2",
180};
181
182static const char *wm8958_main_supplies[] = {
183 "DBVDD1",
184 "DBVDD2",
185 "DBVDD3",
186 "DCVDD",
187 "AVDD1",
188 "AVDD2",
189 "CPVDD",
190 "SPKVDD1",
191 "SPKVDD2",
192};
193
194#ifdef CONFIG_PM
195static int wm8994_suspend(struct device *dev)
196{
197 struct wm8994 *wm8994 = dev_get_drvdata(dev);
198 int ret;
199
200 /* Don't actually go through with the suspend if the CODEC is
201 * still active (eg, for audio passthrough from CP. */
202 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1);
203 if (ret < 0) {
204 dev_err(dev, "Failed to read power status: %d\n", ret);
205 } else if (ret & WM8994_VMID_SEL_MASK) {
206 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
207 return 0;
208 }
209
210 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4);
211 if (ret < 0) {
212 dev_err(dev, "Failed to read power status: %d\n", ret);
213 } else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA |
214 WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA |
215 WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) {
216 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
217 return 0;
218 }
219
220 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5);
221 if (ret < 0) {
222 dev_err(dev, "Failed to read power status: %d\n", ret);
223 } else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA |
224 WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA |
225 WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) {
226 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
227 return 0;
228 }
229
230 switch (wm8994->type) {
231 case WM8958:
232 case WM1811:
233 ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
234 if (ret < 0) {
235 dev_err(dev, "Failed to read power status: %d\n", ret);
236 } else if (ret & WM8958_MICD_ENA) {
237 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
238 return 0;
239 }
240 break;
241 default:
242 break;
243 }
244
245 switch (wm8994->type) {
246 case WM1811:
247 ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2);
248 if (ret < 0) {
249 dev_err(dev, "Failed to read jackdet: %d\n", ret);
250 } else if (ret & WM1811_JACKDET_MODE_MASK) {
251 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
252 return 0;
253 }
254 break;
255 default:
256 break;
257 }
258
259 switch (wm8994->type) {
260 case WM1811:
261 ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2);
262 if (ret < 0) {
263 dev_err(dev, "Failed to read jackdet: %d\n", ret);
264 } else if (ret & WM1811_JACKDET_MODE_MASK) {
265 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
266 return 0;
267 }
268 break;
269 default:
270 break;
271 }
272
273 /* Disable LDO pulldowns while the device is suspended if we
274 * don't know that something will be driving them. */
275 if (!wm8994->ldo_ena_always_driven)
276 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
277 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
278 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);
279
280 /* Explicitly put the device into reset in case regulators
281 * don't get disabled in order to ensure consistent restart.
282 */
283 wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
284 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
285
286 regcache_cache_only(wm8994->regmap, true);
287 regcache_mark_dirty(wm8994->regmap);
288
289 wm8994->suspended = true;
290
291 ret = regulator_bulk_disable(wm8994->num_supplies,
292 wm8994->supplies);
293 if (ret != 0) {
294 dev_err(dev, "Failed to disable supplies: %d\n", ret);
295 return ret;
296 }
297
298 return 0;
299}
300
301static int wm8994_resume(struct device *dev)
302{
303 struct wm8994 *wm8994 = dev_get_drvdata(dev);
304 int ret;
305
306 /* We may have lied to the PM core about suspending */
307 if (!wm8994->suspended)
308 return 0;
309
310 ret = regulator_bulk_enable(wm8994->num_supplies,
311 wm8994->supplies);
312 if (ret != 0) {
313 dev_err(dev, "Failed to enable supplies: %d\n", ret);
314 return ret;
315 }
316
317 regcache_cache_only(wm8994->regmap, false);
318 ret = regcache_sync(wm8994->regmap);
319 if (ret != 0) {
320 dev_err(dev, "Failed to restore register map: %d\n", ret);
321 goto err_enable;
322 }
323
324 /* Disable LDO pulldowns while the device is active */
325 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
326 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
327 0);
328
329 wm8994->suspended = false;
330
331 return 0;
332
333err_enable:
334 regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
335
336 return ret;
337}
338#endif
339
340#ifdef CONFIG_REGULATOR
341static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
342{
343 struct wm8994_ldo_pdata *ldo_pdata;
344
345 if (!pdata)
346 return 0;
347
348 ldo_pdata = &pdata->ldo[ldo];
349
350 if (!ldo_pdata->init_data)
351 return 0;
352
353 return ldo_pdata->init_data->num_consumer_supplies != 0;
354}
355#else
356static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
357{
358 return 0;
359}
360#endif
361
362static const __devinitdata struct reg_default wm8994_revc_patch[] = {
363 { 0x102, 0x3 },
364 { 0x56, 0x3 },
365 { 0x817, 0x0 },
366 { 0x102, 0x0 },
367};
368
369static const __devinitdata struct reg_default wm8958_reva_patch[] = {
370 { 0x102, 0x3 },
371 { 0xcb, 0x81 },
372 { 0x817, 0x0 },
373 { 0x102, 0x0 },
374};
375
376static const __devinitdata struct reg_default wm1811_reva_patch[] = {
377 { 0x102, 0x3 },
378 { 0x56, 0x7 },
379 { 0x5d, 0x7e },
380 { 0x5e, 0x0 },
381 { 0x102, 0x0 },
382};
383
384/*
385 * Instantiate the generic non-control parts of the device.
386 */
387static __devinit int wm8994_device_init(struct wm8994 *wm8994, int irq)
388{
389 struct wm8994_pdata *pdata = wm8994->dev->platform_data;
390 struct regmap_config *regmap_config;
391 const struct reg_default *regmap_patch = NULL;
392 const char *devname;
393 int ret, i, patch_regs;
394 int pulls = 0;
395
396 dev_set_drvdata(wm8994->dev, wm8994);
397
398 /* Add the on-chip regulators first for bootstrapping */
399 ret = mfd_add_devices(wm8994->dev, -1,
400 wm8994_regulator_devs,
401 ARRAY_SIZE(wm8994_regulator_devs),
402 NULL, 0);
403 if (ret != 0) {
404 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
405 goto err;
406 }
407
408 switch (wm8994->type) {
409 case WM1811:
410 wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
411 break;
412 case WM8994:
413 wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
414 break;
415 case WM8958:
416 wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
417 break;
418 default:
419 BUG();
420 goto err;
421 }
422
423 wm8994->supplies = devm_kzalloc(wm8994->dev,
424 sizeof(struct regulator_bulk_data) *
425 wm8994->num_supplies, GFP_KERNEL);
426 if (!wm8994->supplies) {
427 ret = -ENOMEM;
428 goto err;
429 }
430
431 switch (wm8994->type) {
432 case WM1811:
433 for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
434 wm8994->supplies[i].supply = wm1811_main_supplies[i];
435 break;
436 case WM8994:
437 for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
438 wm8994->supplies[i].supply = wm8994_main_supplies[i];
439 break;
440 case WM8958:
441 for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
442 wm8994->supplies[i].supply = wm8958_main_supplies[i];
443 break;
444 default:
445 BUG();
446 goto err;
447 }
448
449 ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
450 wm8994->supplies);
451 if (ret != 0) {
452 dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
453 goto err;
454 }
455
456 ret = regulator_bulk_enable(wm8994->num_supplies,
457 wm8994->supplies);
458 if (ret != 0) {
459 dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
460 goto err_get;
461 }
462
463 ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
464 if (ret < 0) {
465 dev_err(wm8994->dev, "Failed to read ID register\n");
466 goto err_enable;
467 }
468 switch (ret) {
469 case 0x1811:
470 devname = "WM1811";
471 if (wm8994->type != WM1811)
472 dev_warn(wm8994->dev, "Device registered as type %d\n",
473 wm8994->type);
474 wm8994->type = WM1811;
475 break;
476 case 0x8994:
477 devname = "WM8994";
478 if (wm8994->type != WM8994)
479 dev_warn(wm8994->dev, "Device registered as type %d\n",
480 wm8994->type);
481 wm8994->type = WM8994;
482 break;
483 case 0x8958:
484 devname = "WM8958";
485 if (wm8994->type != WM8958)
486 dev_warn(wm8994->dev, "Device registered as type %d\n",
487 wm8994->type);
488 wm8994->type = WM8958;
489 break;
490 default:
491 dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
492 ret);
493 ret = -EINVAL;
494 goto err_enable;
495 }
496
497 ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
498 if (ret < 0) {
499 dev_err(wm8994->dev, "Failed to read revision register: %d\n",
500 ret);
501 goto err_enable;
502 }
503 wm8994->revision = ret & WM8994_CHIP_REV_MASK;
504 wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;
505
506 switch (wm8994->type) {
507 case WM8994:
508 switch (wm8994->revision) {
509 case 0:
510 case 1:
511 dev_warn(wm8994->dev,
512 "revision %c not fully supported\n",
513 'A' + wm8994->revision);
514 break;
515 case 2:
516 case 3:
517 regmap_patch = wm8994_revc_patch;
518 patch_regs = ARRAY_SIZE(wm8994_revc_patch);
519 break;
520 default:
521 break;
522 }
523 break;
524
525 case WM8958:
526 switch (wm8994->revision) {
527 case 0:
528 regmap_patch = wm8958_reva_patch;
529 patch_regs = ARRAY_SIZE(wm8958_reva_patch);
530 break;
531 default:
532 break;
533 }
534 break;
535
536 case WM1811:
537 /* Revision C did not change the relevant layer */
538 if (wm8994->revision > 1)
539 wm8994->revision++;
540 switch (wm8994->revision) {
541 case 0:
542 case 1:
543 case 2:
544 case 3:
545 regmap_patch = wm1811_reva_patch;
546 patch_regs = ARRAY_SIZE(wm1811_reva_patch);
547 break;
548 default:
549 break;
550 }
551 break;
552
553 default:
554 break;
555 }
556
557 dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
558 'A' + wm8994->revision, wm8994->cust_id);
559
560 switch (wm8994->type) {
561 case WM1811:
562 regmap_config = &wm1811_regmap_config;
563 break;
564 case WM8994:
565 regmap_config = &wm8994_regmap_config;
566 break;
567 case WM8958:
568 regmap_config = &wm8958_regmap_config;
569 break;
570 default:
571 dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
572 return -EINVAL;
573 }
574
575 ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
576 if (ret != 0) {
577 dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
578 ret);
579 return ret;
580 }
581
582 if (regmap_patch) {
583 ret = regmap_register_patch(wm8994->regmap, regmap_patch,
584 patch_regs);
585 if (ret != 0) {
586 dev_err(wm8994->dev, "Failed to register patch: %d\n",
587 ret);
588 goto err;
589 }
590 }
591
592 if (pdata) {
593 wm8994->irq_base = pdata->irq_base;
594 wm8994->gpio_base = pdata->gpio_base;
595
596 /* GPIO configuration is only applied if it's non-zero */
597 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
598 if (pdata->gpio_defaults[i]) {
599 wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
600 0xffff,
601 pdata->gpio_defaults[i]);
602 }
603 }
604
605 wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;
606
607 if (pdata->spkmode_pu)
608 pulls |= WM8994_SPKMODE_PU;
609 }
610
611 /* Disable unneeded pulls */
612 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
613 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD |
614 WM8994_SPKMODE_PU | WM8994_CSNADDR_PD,
615 pulls);
616
617 /* In some system designs where the regulators are not in use,
618 * we can achieve a small reduction in leakage currents by
619 * floating LDO outputs. This bit makes no difference if the
620 * LDOs are enabled, it only affects cases where the LDOs were
621 * in operation and are then disabled.
622 */
623 for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
624 if (wm8994_ldo_in_use(pdata, i))
625 wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
626 WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
627 else
628 wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
629 WM8994_LDO1_DISCH, 0);
630 }
631
632 wm8994_irq_init(wm8994);
633
634 ret = mfd_add_devices(wm8994->dev, -1,
635 wm8994_devs, ARRAY_SIZE(wm8994_devs),
636 NULL, 0);
637 if (ret != 0) {
638 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
639 goto err_irq;
640 }
641
642 pm_runtime_enable(wm8994->dev);
643 pm_runtime_idle(wm8994->dev);
644
645 return 0;
646
647err_irq:
648 wm8994_irq_exit(wm8994);
649err_enable:
650 regulator_bulk_disable(wm8994->num_supplies,
651 wm8994->supplies);
652err_get:
653 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
654err:
655 mfd_remove_devices(wm8994->dev);
656 return ret;
657}
658
659static __devexit void wm8994_device_exit(struct wm8994 *wm8994)
660{
661 pm_runtime_disable(wm8994->dev);
662 mfd_remove_devices(wm8994->dev);
663 wm8994_irq_exit(wm8994);
664 regulator_bulk_disable(wm8994->num_supplies,
665 wm8994->supplies);
666 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
667}
668
669static const struct of_device_id wm8994_of_match[] = {
670 { .compatible = "wlf,wm1811", },
671 { .compatible = "wlf,wm8994", },
672 { .compatible = "wlf,wm8958", },
673 { }
674};
675MODULE_DEVICE_TABLE(of, wm8994_of_match);
676
677static __devinit int wm8994_i2c_probe(struct i2c_client *i2c,
678 const struct i2c_device_id *id)
679{
680 struct wm8994 *wm8994;
681 int ret;
682
683 wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
684 if (wm8994 == NULL)
685 return -ENOMEM;
686
687 i2c_set_clientdata(i2c, wm8994);
688 wm8994->dev = &i2c->dev;
689 wm8994->irq = i2c->irq;
690 wm8994->type = id->driver_data;
691
692 wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
693 if (IS_ERR(wm8994->regmap)) {
694 ret = PTR_ERR(wm8994->regmap);
695 dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
696 ret);
697 return ret;
698 }
699
700 return wm8994_device_init(wm8994, i2c->irq);
701}
702
703static __devexit int wm8994_i2c_remove(struct i2c_client *i2c)
704{
705 struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
706
707 wm8994_device_exit(wm8994);
708
709 return 0;
710}
711
712static const struct i2c_device_id wm8994_i2c_id[] = {
713 { "wm1811", WM1811 },
714 { "wm1811a", WM1811 },
715 { "wm8994", WM8994 },
716 { "wm8958", WM8958 },
717 { }
718};
719MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
720
721static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume,
722 NULL);
723
724static struct i2c_driver wm8994_i2c_driver = {
725 .driver = {
726 .name = "wm8994",
727 .owner = THIS_MODULE,
728 .pm = &wm8994_pm_ops,
729 .of_match_table = wm8994_of_match,
730 },
731 .probe = wm8994_i2c_probe,
732 .remove = __devexit_p(wm8994_i2c_remove),
733 .id_table = wm8994_i2c_id,
734};
735
736module_i2c_driver(wm8994_i2c_driver);
737
738MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
739MODULE_LICENSE("GPL");
740MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");