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26#include <linux/module.h>
27#include <linux/types.h>
28#include <linux/slab.h>
29#include <linux/kernel.h>
30#include <linux/err.h>
31#include <linux/platform_device.h>
32#include <linux/of.h>
33#include <linux/of_irq.h>
34#include <linux/of_gpio.h>
35#include <linux/of_platform.h>
36#include <linux/gpio.h>
37#include <linux/delay.h>
38#include <linux/i2c.h>
39#include <linux/regmap.h>
40#include <linux/mfd/core.h>
41#include <linux/mfd/twl6040.h>
42#include <linux/regulator/consumer.h>
43
44#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
45#define TWL6040_NUM_SUPPLIES (2)
46
47static bool twl6040_has_vibra(struct twl6040_platform_data *pdata,
48 struct device_node *node)
49{
50 if (pdata && pdata->vibra)
51 return true;
52
53#ifdef CONFIG_OF
54 if (of_find_node_by_name(node, "vibra"))
55 return true;
56#endif
57
58 return false;
59}
60
61int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
62{
63 int ret;
64 unsigned int val;
65
66
67 if (unlikely(reg == TWL6040_REG_VIBCTLL ||
68 reg == TWL6040_REG_VIBCTLR)) {
69 val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
70 } else {
71 ret = regmap_read(twl6040->regmap, reg, &val);
72 if (ret < 0)
73 return ret;
74 }
75
76 return val;
77}
78EXPORT_SYMBOL(twl6040_reg_read);
79
80int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
81{
82 int ret;
83
84 ret = regmap_write(twl6040->regmap, reg, val);
85
86 if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
87 twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
88
89 return ret;
90}
91EXPORT_SYMBOL(twl6040_reg_write);
92
93int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
94{
95 return regmap_update_bits(twl6040->regmap, reg, mask, mask);
96}
97EXPORT_SYMBOL(twl6040_set_bits);
98
99int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
100{
101 return regmap_update_bits(twl6040->regmap, reg, mask, 0);
102}
103EXPORT_SYMBOL(twl6040_clear_bits);
104
105
106static int twl6040_power_up_manual(struct twl6040 *twl6040)
107{
108 u8 ldoctl, ncpctl, lppllctl;
109 int ret;
110
111
112 ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
113 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
114 if (ret)
115 return ret;
116 usleep_range(10000, 10500);
117
118
119 ncpctl = TWL6040_NCPENA;
120 ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
121 if (ret)
122 goto ncp_err;
123 usleep_range(1000, 1500);
124
125
126 ldoctl |= TWL6040_LSLDOENA;
127 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
128 if (ret)
129 goto lsldo_err;
130 usleep_range(1000, 1500);
131
132
133 lppllctl = TWL6040_LPLLENA;
134 ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
135 if (ret)
136 goto lppll_err;
137 usleep_range(5000, 5500);
138
139
140 ldoctl &= ~TWL6040_OSCENA;
141 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
142 if (ret)
143 goto osc_err;
144
145 return 0;
146
147osc_err:
148 lppllctl &= ~TWL6040_LPLLENA;
149 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
150lppll_err:
151 ldoctl &= ~TWL6040_LSLDOENA;
152 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
153lsldo_err:
154 ncpctl &= ~TWL6040_NCPENA;
155 twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
156ncp_err:
157 ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
158 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
159
160 dev_err(twl6040->dev, "manual power-up failed\n");
161 return ret;
162}
163
164
165static void twl6040_power_down_manual(struct twl6040 *twl6040)
166{
167 u8 ncpctl, ldoctl, lppllctl;
168
169 ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
170 ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
171 lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
172
173
174 ldoctl |= TWL6040_OSCENA;
175 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
176 usleep_range(1000, 1500);
177
178
179 lppllctl &= ~TWL6040_LPLLENA;
180 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
181
182
183 ldoctl &= ~TWL6040_LSLDOENA;
184 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
185
186
187 ncpctl &= ~TWL6040_NCPENA;
188 twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
189
190
191 ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
192 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
193}
194
195static irqreturn_t twl6040_readyint_handler(int irq, void *data)
196{
197 struct twl6040 *twl6040 = data;
198
199 complete(&twl6040->ready);
200
201 return IRQ_HANDLED;
202}
203
204static irqreturn_t twl6040_thint_handler(int irq, void *data)
205{
206 struct twl6040 *twl6040 = data;
207 u8 status;
208
209 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
210 if (status & TWL6040_TSHUTDET) {
211 dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
212 twl6040_power(twl6040, 0);
213 } else {
214 dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
215 twl6040_power(twl6040, 1);
216 }
217
218 return IRQ_HANDLED;
219}
220
221static int twl6040_power_up_automatic(struct twl6040 *twl6040)
222{
223 int time_left;
224
225 gpio_set_value(twl6040->audpwron, 1);
226
227 time_left = wait_for_completion_timeout(&twl6040->ready,
228 msecs_to_jiffies(144));
229 if (!time_left) {
230 u8 intid;
231
232 dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
233 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
234 if (!(intid & TWL6040_READYINT)) {
235 dev_err(twl6040->dev, "automatic power-up failed\n");
236 gpio_set_value(twl6040->audpwron, 0);
237 return -ETIMEDOUT;
238 }
239 }
240
241 return 0;
242}
243
244int twl6040_power(struct twl6040 *twl6040, int on)
245{
246 int ret = 0;
247
248 mutex_lock(&twl6040->mutex);
249
250 if (on) {
251
252 if (twl6040->power_count++)
253 goto out;
254
255 if (gpio_is_valid(twl6040->audpwron)) {
256
257 ret = twl6040_power_up_automatic(twl6040);
258 if (ret) {
259 twl6040->power_count = 0;
260 goto out;
261 }
262 } else {
263
264 ret = twl6040_power_up_manual(twl6040);
265 if (ret) {
266 twl6040->power_count = 0;
267 goto out;
268 }
269 }
270
271 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
272 twl6040->sysclk = 19200000;
273 twl6040->mclk = 32768;
274 } else {
275
276 if (!twl6040->power_count) {
277 dev_err(twl6040->dev,
278 "device is already powered-off\n");
279 ret = -EPERM;
280 goto out;
281 }
282
283 if (--twl6040->power_count)
284 goto out;
285
286 if (gpio_is_valid(twl6040->audpwron)) {
287
288 gpio_set_value(twl6040->audpwron, 0);
289
290
291 usleep_range(500, 700);
292 } else {
293
294 twl6040_power_down_manual(twl6040);
295 }
296 twl6040->sysclk = 0;
297 twl6040->mclk = 0;
298 }
299
300out:
301 mutex_unlock(&twl6040->mutex);
302 return ret;
303}
304EXPORT_SYMBOL(twl6040_power);
305
306int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
307 unsigned int freq_in, unsigned int freq_out)
308{
309 u8 hppllctl, lppllctl;
310 int ret = 0;
311
312 mutex_lock(&twl6040->mutex);
313
314 hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
315 lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
316
317
318 if (pll_id != twl6040->pll) {
319 twl6040->sysclk = 0;
320 twl6040->mclk = 0;
321 }
322
323 switch (pll_id) {
324 case TWL6040_SYSCLK_SEL_LPPLL:
325
326
327 if (twl6040->sysclk != freq_out) {
328 switch (freq_out) {
329 case 17640000:
330 lppllctl |= TWL6040_LPLLFIN;
331 break;
332 case 19200000:
333 lppllctl &= ~TWL6040_LPLLFIN;
334 break;
335 default:
336 dev_err(twl6040->dev,
337 "freq_out %d not supported\n",
338 freq_out);
339 ret = -EINVAL;
340 goto pll_out;
341 }
342 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
343 lppllctl);
344 }
345
346
347 if (twl6040->pll == pll_id)
348 break;
349
350 switch (freq_in) {
351 case 32768:
352 lppllctl |= TWL6040_LPLLENA;
353 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
354 lppllctl);
355 mdelay(5);
356 lppllctl &= ~TWL6040_HPLLSEL;
357 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
358 lppllctl);
359 hppllctl &= ~TWL6040_HPLLENA;
360 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
361 hppllctl);
362 break;
363 default:
364 dev_err(twl6040->dev,
365 "freq_in %d not supported\n", freq_in);
366 ret = -EINVAL;
367 goto pll_out;
368 }
369 break;
370 case TWL6040_SYSCLK_SEL_HPPLL:
371
372 if (freq_out != 19200000) {
373 dev_err(twl6040->dev,
374 "freq_out %d not supported\n", freq_out);
375 ret = -EINVAL;
376 goto pll_out;
377 }
378
379 if (twl6040->mclk != freq_in) {
380 hppllctl &= ~TWL6040_MCLK_MSK;
381
382 switch (freq_in) {
383 case 12000000:
384
385 hppllctl |= TWL6040_MCLK_12000KHZ |
386 TWL6040_HPLLENA;
387 break;
388 case 19200000:
389
390
391
392
393
394 hppllctl |= TWL6040_MCLK_19200KHZ;
395 break;
396 case 26000000:
397
398 hppllctl |= TWL6040_MCLK_26000KHZ |
399 TWL6040_HPLLENA;
400 break;
401 case 38400000:
402
403 hppllctl |= TWL6040_MCLK_38400KHZ |
404 TWL6040_HPLLENA;
405 break;
406 default:
407 dev_err(twl6040->dev,
408 "freq_in %d not supported\n", freq_in);
409 ret = -EINVAL;
410 goto pll_out;
411 }
412
413
414
415
416
417 hppllctl |= TWL6040_HPLLSQRENA;
418
419 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
420 hppllctl);
421 usleep_range(500, 700);
422 lppllctl |= TWL6040_HPLLSEL;
423 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
424 lppllctl);
425 lppllctl &= ~TWL6040_LPLLENA;
426 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
427 lppllctl);
428 }
429 break;
430 default:
431 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
432 ret = -EINVAL;
433 goto pll_out;
434 }
435
436 twl6040->sysclk = freq_out;
437 twl6040->mclk = freq_in;
438 twl6040->pll = pll_id;
439
440pll_out:
441 mutex_unlock(&twl6040->mutex);
442 return ret;
443}
444EXPORT_SYMBOL(twl6040_set_pll);
445
446int twl6040_get_pll(struct twl6040 *twl6040)
447{
448 if (twl6040->power_count)
449 return twl6040->pll;
450 else
451 return -ENODEV;
452}
453EXPORT_SYMBOL(twl6040_get_pll);
454
455unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
456{
457 return twl6040->sysclk;
458}
459EXPORT_SYMBOL(twl6040_get_sysclk);
460
461
462int twl6040_get_vibralr_status(struct twl6040 *twl6040)
463{
464 u8 status;
465
466 status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
467 status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
468
469 return status;
470}
471EXPORT_SYMBOL(twl6040_get_vibralr_status);
472
473static struct resource twl6040_vibra_rsrc[] = {
474 {
475 .flags = IORESOURCE_IRQ,
476 },
477};
478
479static struct resource twl6040_codec_rsrc[] = {
480 {
481 .flags = IORESOURCE_IRQ,
482 },
483};
484
485static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
486{
487
488 if (!reg)
489 return false;
490 return true;
491}
492
493static struct regmap_config twl6040_regmap_config = {
494 .reg_bits = 8,
495 .val_bits = 8,
496 .max_register = TWL6040_REG_STATUS,
497
498 .readable_reg = twl6040_readable_reg,
499};
500
501static const struct regmap_irq twl6040_irqs[] = {
502 { .reg_offset = 0, .mask = TWL6040_THINT, },
503 { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
504 { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
505 { .reg_offset = 0, .mask = TWL6040_HFINT, },
506 { .reg_offset = 0, .mask = TWL6040_VIBINT, },
507 { .reg_offset = 0, .mask = TWL6040_READYINT, },
508};
509
510static struct regmap_irq_chip twl6040_irq_chip = {
511 .name = "twl6040",
512 .irqs = twl6040_irqs,
513 .num_irqs = ARRAY_SIZE(twl6040_irqs),
514
515 .num_regs = 1,
516 .status_base = TWL6040_REG_INTID,
517 .mask_base = TWL6040_REG_INTMR,
518};
519
520static int twl6040_probe(struct i2c_client *client,
521 const struct i2c_device_id *id)
522{
523 struct twl6040_platform_data *pdata = client->dev.platform_data;
524 struct device_node *node = client->dev.of_node;
525 struct twl6040 *twl6040;
526 struct mfd_cell *cell = NULL;
527 int irq, ret, children = 0;
528
529 if (!pdata && !node) {
530 dev_err(&client->dev, "Platform data is missing\n");
531 return -EINVAL;
532 }
533
534
535 if (!client->irq) {
536 dev_err(&client->dev, "Invalid IRQ configuration\n");
537 return -EINVAL;
538 }
539
540 twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
541 GFP_KERNEL);
542 if (!twl6040) {
543 ret = -ENOMEM;
544 goto err;
545 }
546
547 twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
548 if (IS_ERR(twl6040->regmap)) {
549 ret = PTR_ERR(twl6040->regmap);
550 goto err;
551 }
552
553 i2c_set_clientdata(client, twl6040);
554
555 twl6040->supplies[0].supply = "vio";
556 twl6040->supplies[1].supply = "v2v1";
557 ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
558 twl6040->supplies);
559 if (ret != 0) {
560 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
561 goto regulator_get_err;
562 }
563
564 ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
565 if (ret != 0) {
566 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
567 goto regulator_get_err;
568 }
569
570 twl6040->dev = &client->dev;
571 twl6040->irq = client->irq;
572
573 mutex_init(&twl6040->mutex);
574 init_completion(&twl6040->ready);
575
576 twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
577
578
579 if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {
580 if (pdata)
581 twl6040->audpwron = pdata->audpwron_gpio;
582 else
583 twl6040->audpwron = of_get_named_gpio(node,
584 "ti,audpwron-gpio", 0);
585 } else
586 twl6040->audpwron = -EINVAL;
587
588 if (gpio_is_valid(twl6040->audpwron)) {
589 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
590 GPIOF_OUT_INIT_LOW, "audpwron");
591 if (ret)
592 goto gpio_err;
593 }
594
595 ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq,
596 IRQF_ONESHOT, 0, &twl6040_irq_chip,
597 &twl6040->irq_data);
598 if (ret < 0)
599 goto gpio_err;
600
601 twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
602 TWL6040_IRQ_READY);
603 twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
604 TWL6040_IRQ_TH);
605
606 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
607 twl6040_readyint_handler, IRQF_ONESHOT,
608 "twl6040_irq_ready", twl6040);
609 if (ret) {
610 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
611 goto readyirq_err;
612 }
613
614 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
615 twl6040_thint_handler, IRQF_ONESHOT,
616 "twl6040_irq_th", twl6040);
617 if (ret) {
618 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
619 goto thirq_err;
620 }
621
622
623 twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
624
625
626
627
628
629
630
631 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
632 cell = &twl6040->cells[children];
633 cell->name = "twl6040-codec";
634 twl6040_codec_rsrc[0].start = irq;
635 twl6040_codec_rsrc[0].end = irq;
636 cell->resources = twl6040_codec_rsrc;
637 cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
638 if (pdata && pdata->codec) {
639 cell->platform_data = pdata->codec;
640 cell->pdata_size = sizeof(*pdata->codec);
641 }
642 children++;
643
644 if (twl6040_has_vibra(pdata, node)) {
645 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
646
647 cell = &twl6040->cells[children];
648 cell->name = "twl6040-vibra";
649 twl6040_vibra_rsrc[0].start = irq;
650 twl6040_vibra_rsrc[0].end = irq;
651 cell->resources = twl6040_vibra_rsrc;
652 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
653
654 if (pdata && pdata->vibra) {
655 cell->platform_data = pdata->vibra;
656 cell->pdata_size = sizeof(*pdata->vibra);
657 }
658 children++;
659 }
660
661
662
663
664
665 if (!pdata || (pdata && pdata->gpo)) {
666 cell = &twl6040->cells[children];
667 cell->name = "twl6040-gpo";
668
669 if (pdata) {
670 cell->platform_data = pdata->gpo;
671 cell->pdata_size = sizeof(*pdata->gpo);
672 }
673 children++;
674 }
675
676 ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
677 NULL, 0, NULL);
678 if (ret)
679 goto mfd_err;
680
681 return 0;
682
683mfd_err:
684 devm_free_irq(&client->dev, twl6040->irq_th, twl6040);
685thirq_err:
686 devm_free_irq(&client->dev, twl6040->irq_ready, twl6040);
687readyirq_err:
688 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
689gpio_err:
690 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
691regulator_get_err:
692 i2c_set_clientdata(client, NULL);
693err:
694 return ret;
695}
696
697static int twl6040_remove(struct i2c_client *client)
698{
699 struct twl6040 *twl6040 = i2c_get_clientdata(client);
700
701 if (twl6040->power_count)
702 twl6040_power(twl6040, 0);
703
704 devm_free_irq(&client->dev, twl6040->irq_ready, twl6040);
705 devm_free_irq(&client->dev, twl6040->irq_th, twl6040);
706 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
707
708 mfd_remove_devices(&client->dev);
709 i2c_set_clientdata(client, NULL);
710
711 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
712
713 return 0;
714}
715
716static const struct i2c_device_id twl6040_i2c_id[] = {
717 { "twl6040", 0, },
718 { "twl6041", 0, },
719 { },
720};
721MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
722
723static struct i2c_driver twl6040_driver = {
724 .driver = {
725 .name = "twl6040",
726 .owner = THIS_MODULE,
727 },
728 .probe = twl6040_probe,
729 .remove = twl6040_remove,
730 .id_table = twl6040_i2c_id,
731};
732
733module_i2c_driver(twl6040_driver);
734
735MODULE_DESCRIPTION("TWL6040 MFD");
736MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
737MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
738MODULE_LICENSE("GPL");
739MODULE_ALIAS("platform:twl6040");
740
