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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Core driver for TI TPS6586x PMIC family
4 *
5 * Copyright (c) 2010 CompuLab Ltd.
6 * Mike Rapoport <mike@compulab.co.il>
7 *
8 * Based on da903x.c.
9 * Copyright (C) 2008 Compulab, Ltd.
10 * Mike Rapoport <mike@compulab.co.il>
11 * Copyright (C) 2006-2008 Marvell International Ltd.
12 * Eric Miao <eric.miao@marvell.com>
13 */
14
15#include <linux/interrupt.h>
16#include <linux/irq.h>
17#include <linux/irqdomain.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/mutex.h>
21#include <linux/slab.h>
22#include <linux/err.h>
23#include <linux/i2c.h>
24#include <linux/platform_device.h>
25#include <linux/regmap.h>
26#include <linux/of.h>
27
28#include <linux/mfd/core.h>
29#include <linux/mfd/tps6586x.h>
30
31#define TPS6586X_SUPPLYENE 0x14
32#define EXITSLREQ_BIT BIT(1)
33#define SLEEP_MODE_BIT BIT(3)
34
35/* interrupt control registers */
36#define TPS6586X_INT_ACK1 0xb5
37#define TPS6586X_INT_ACK2 0xb6
38#define TPS6586X_INT_ACK3 0xb7
39#define TPS6586X_INT_ACK4 0xb8
40
41/* interrupt mask registers */
42#define TPS6586X_INT_MASK1 0xb0
43#define TPS6586X_INT_MASK2 0xb1
44#define TPS6586X_INT_MASK3 0xb2
45#define TPS6586X_INT_MASK4 0xb3
46#define TPS6586X_INT_MASK5 0xb4
47
48/* device id */
49#define TPS6586X_VERSIONCRC 0xcd
50
51/* Maximum register */
52#define TPS6586X_MAX_REGISTER TPS6586X_VERSIONCRC
53
54struct tps6586x_irq_data {
55 u8 mask_reg;
56 u8 mask_mask;
57};
58
59#define TPS6586X_IRQ(_reg, _mask) \
60 { \
61 .mask_reg = (_reg) - TPS6586X_INT_MASK1, \
62 .mask_mask = (_mask), \
63 }
64
65static const struct tps6586x_irq_data tps6586x_irqs[] = {
66 [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
67 [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
68 [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
69 [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
70 [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
71 [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
72 [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
73 [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
74 [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
75 [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
76 [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
77 [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
78 [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
79 [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
80 [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
81 [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
82 [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
83 [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
84 [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
85 [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
86 [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
87 [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
88 [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
89 [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
90 [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
91 [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
92 [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
93};
94
95static struct resource tps6586x_rtc_resources[] = {
96 {
97 .start = TPS6586X_INT_RTC_ALM1,
98 .end = TPS6586X_INT_RTC_ALM1,
99 .flags = IORESOURCE_IRQ,
100 },
101};
102
103static const struct mfd_cell tps6586x_cell[] = {
104 {
105 .name = "tps6586x-gpio",
106 },
107 {
108 .name = "tps6586x-regulator",
109 },
110 {
111 .name = "tps6586x-rtc",
112 .num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
113 .resources = &tps6586x_rtc_resources[0],
114 },
115 {
116 .name = "tps6586x-onkey",
117 },
118};
119
120struct tps6586x {
121 struct device *dev;
122 struct i2c_client *client;
123 struct regmap *regmap;
124 int version;
125
126 int irq;
127 struct irq_chip irq_chip;
128 struct mutex irq_lock;
129 int irq_base;
130 u32 irq_en;
131 u8 mask_reg[5];
132 struct irq_domain *irq_domain;
133};
134
135static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
136{
137 return i2c_get_clientdata(to_i2c_client(dev));
138}
139
140int tps6586x_write(struct device *dev, int reg, uint8_t val)
141{
142 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
143
144 return regmap_write(tps6586x->regmap, reg, val);
145}
146EXPORT_SYMBOL_GPL(tps6586x_write);
147
148int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
149{
150 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
151
152 return regmap_bulk_write(tps6586x->regmap, reg, val, len);
153}
154EXPORT_SYMBOL_GPL(tps6586x_writes);
155
156int tps6586x_read(struct device *dev, int reg, uint8_t *val)
157{
158 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
159 unsigned int rval;
160 int ret;
161
162 ret = regmap_read(tps6586x->regmap, reg, &rval);
163 if (!ret)
164 *val = rval;
165 return ret;
166}
167EXPORT_SYMBOL_GPL(tps6586x_read);
168
169int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
170{
171 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
172
173 return regmap_bulk_read(tps6586x->regmap, reg, val, len);
174}
175EXPORT_SYMBOL_GPL(tps6586x_reads);
176
177int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
178{
179 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
180
181 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
182}
183EXPORT_SYMBOL_GPL(tps6586x_set_bits);
184
185int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
186{
187 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
188
189 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
190}
191EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
192
193int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
194{
195 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
196
197 return regmap_update_bits(tps6586x->regmap, reg, mask, val);
198}
199EXPORT_SYMBOL_GPL(tps6586x_update);
200
201int tps6586x_irq_get_virq(struct device *dev, int irq)
202{
203 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
204
205 return irq_create_mapping(tps6586x->irq_domain, irq);
206}
207EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
208
209int tps6586x_get_version(struct device *dev)
210{
211 struct tps6586x *tps6586x = dev_get_drvdata(dev);
212
213 return tps6586x->version;
214}
215EXPORT_SYMBOL_GPL(tps6586x_get_version);
216
217static int __remove_subdev(struct device *dev, void *unused)
218{
219 platform_device_unregister(to_platform_device(dev));
220 return 0;
221}
222
223static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
224{
225 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
226}
227
228static void tps6586x_irq_lock(struct irq_data *data)
229{
230 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
231
232 mutex_lock(&tps6586x->irq_lock);
233}
234
235static void tps6586x_irq_enable(struct irq_data *irq_data)
236{
237 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
238 unsigned int __irq = irq_data->hwirq;
239 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
240
241 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
242 tps6586x->irq_en |= (1 << __irq);
243}
244
245static void tps6586x_irq_disable(struct irq_data *irq_data)
246{
247 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
248
249 unsigned int __irq = irq_data->hwirq;
250 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
251
252 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
253 tps6586x->irq_en &= ~(1 << __irq);
254}
255
256static void tps6586x_irq_sync_unlock(struct irq_data *data)
257{
258 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
259 int i;
260
261 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
262 int ret;
263 ret = tps6586x_write(tps6586x->dev,
264 TPS6586X_INT_MASK1 + i,
265 tps6586x->mask_reg[i]);
266 WARN_ON(ret);
267 }
268
269 mutex_unlock(&tps6586x->irq_lock);
270}
271
272#ifdef CONFIG_PM_SLEEP
273static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
274{
275 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
276 return irq_set_irq_wake(tps6586x->irq, on);
277}
278#else
279#define tps6586x_irq_set_wake NULL
280#endif
281
282static struct irq_chip tps6586x_irq_chip = {
283 .name = "tps6586x",
284 .irq_bus_lock = tps6586x_irq_lock,
285 .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
286 .irq_disable = tps6586x_irq_disable,
287 .irq_enable = tps6586x_irq_enable,
288 .irq_set_wake = tps6586x_irq_set_wake,
289};
290
291static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
292 irq_hw_number_t hw)
293{
294 struct tps6586x *tps6586x = h->host_data;
295
296 irq_set_chip_data(virq, tps6586x);
297 irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
298 irq_set_nested_thread(virq, 1);
299 irq_set_noprobe(virq);
300
301 return 0;
302}
303
304static const struct irq_domain_ops tps6586x_domain_ops = {
305 .map = tps6586x_irq_map,
306 .xlate = irq_domain_xlate_twocell,
307};
308
309static irqreturn_t tps6586x_irq(int irq, void *data)
310{
311 struct tps6586x *tps6586x = data;
312 uint32_t acks;
313 __le32 val;
314 int ret = 0;
315
316 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
317 sizeof(acks), (uint8_t *)&val);
318
319 if (ret < 0) {
320 dev_err(tps6586x->dev, "failed to read interrupt status\n");
321 return IRQ_NONE;
322 }
323
324 acks = le32_to_cpu(val);
325
326 while (acks) {
327 int i = __ffs(acks);
328
329 if (tps6586x->irq_en & (1 << i))
330 handle_nested_irq(
331 irq_find_mapping(tps6586x->irq_domain, i));
332
333 acks &= ~(1 << i);
334 }
335
336 return IRQ_HANDLED;
337}
338
339static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
340 int irq_base)
341{
342 int i, ret;
343 u8 tmp[4];
344 int new_irq_base;
345 int irq_num = ARRAY_SIZE(tps6586x_irqs);
346
347 tps6586x->irq = irq;
348
349 mutex_init(&tps6586x->irq_lock);
350 for (i = 0; i < 5; i++) {
351 tps6586x->mask_reg[i] = 0xff;
352 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
353 }
354
355 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
356
357 if (irq_base > 0) {
358 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
359 if (new_irq_base < 0) {
360 dev_err(tps6586x->dev,
361 "Failed to alloc IRQs: %d\n", new_irq_base);
362 return new_irq_base;
363 }
364 } else {
365 new_irq_base = 0;
366 }
367
368 tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
369 irq_num, new_irq_base, &tps6586x_domain_ops,
370 tps6586x);
371 if (!tps6586x->irq_domain) {
372 dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
373 return -ENOMEM;
374 }
375 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
376 "tps6586x", tps6586x);
377
378 if (!ret)
379 device_init_wakeup(tps6586x->dev, 1);
380
381 return ret;
382}
383
384static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
385 struct tps6586x_platform_data *pdata)
386{
387 struct tps6586x_subdev_info *subdev;
388 struct platform_device *pdev;
389 int i, ret = 0;
390
391 for (i = 0; i < pdata->num_subdevs; i++) {
392 subdev = &pdata->subdevs[i];
393
394 pdev = platform_device_alloc(subdev->name, subdev->id);
395 if (!pdev) {
396 ret = -ENOMEM;
397 goto failed;
398 }
399
400 pdev->dev.parent = tps6586x->dev;
401 pdev->dev.platform_data = subdev->platform_data;
402 pdev->dev.of_node = subdev->of_node;
403
404 ret = platform_device_add(pdev);
405 if (ret) {
406 platform_device_put(pdev);
407 goto failed;
408 }
409 }
410 return 0;
411
412failed:
413 tps6586x_remove_subdevs(tps6586x);
414 return ret;
415}
416
417#ifdef CONFIG_OF
418static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
419{
420 struct device_node *np = client->dev.of_node;
421 struct tps6586x_platform_data *pdata;
422
423 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
424 if (!pdata)
425 return NULL;
426
427 pdata->num_subdevs = 0;
428 pdata->subdevs = NULL;
429 pdata->gpio_base = -1;
430 pdata->irq_base = -1;
431 pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
432
433 return pdata;
434}
435
436static const struct of_device_id tps6586x_of_match[] = {
437 { .compatible = "ti,tps6586x", },
438 { },
439};
440#else
441static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
442{
443 return NULL;
444}
445#endif
446
447static bool is_volatile_reg(struct device *dev, unsigned int reg)
448{
449 /* Cache all interrupt mask register */
450 if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
451 return false;
452
453 return true;
454}
455
456static const struct regmap_config tps6586x_regmap_config = {
457 .reg_bits = 8,
458 .val_bits = 8,
459 .max_register = TPS6586X_MAX_REGISTER,
460 .volatile_reg = is_volatile_reg,
461 .cache_type = REGCACHE_RBTREE,
462};
463
464static struct device *tps6586x_dev;
465static void tps6586x_power_off(void)
466{
467 if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
468 return;
469
470 tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
471}
472
473static void tps6586x_print_version(struct i2c_client *client, int version)
474{
475 const char *name;
476
477 switch (version) {
478 case TPS658621A:
479 name = "TPS658621A";
480 break;
481 case TPS658621CD:
482 name = "TPS658621C/D";
483 break;
484 case TPS658623:
485 name = "TPS658623";
486 break;
487 case TPS658640:
488 case TPS658640v2:
489 name = "TPS658640";
490 break;
491 case TPS658643:
492 name = "TPS658643";
493 break;
494 default:
495 name = "TPS6586X";
496 break;
497 }
498
499 dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
500}
501
502static int tps6586x_i2c_probe(struct i2c_client *client,
503 const struct i2c_device_id *id)
504{
505 struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
506 struct tps6586x *tps6586x;
507 int ret;
508 int version;
509
510 if (!pdata && client->dev.of_node)
511 pdata = tps6586x_parse_dt(client);
512
513 if (!pdata) {
514 dev_err(&client->dev, "tps6586x requires platform data\n");
515 return -ENOTSUPP;
516 }
517
518 version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
519 if (version < 0) {
520 dev_err(&client->dev, "Chip ID read failed: %d\n", version);
521 return -EIO;
522 }
523
524 tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
525 if (!tps6586x)
526 return -ENOMEM;
527
528 tps6586x->version = version;
529 tps6586x_print_version(client, tps6586x->version);
530
531 tps6586x->client = client;
532 tps6586x->dev = &client->dev;
533 i2c_set_clientdata(client, tps6586x);
534
535 tps6586x->regmap = devm_regmap_init_i2c(client,
536 &tps6586x_regmap_config);
537 if (IS_ERR(tps6586x->regmap)) {
538 ret = PTR_ERR(tps6586x->regmap);
539 dev_err(&client->dev, "regmap init failed: %d\n", ret);
540 return ret;
541 }
542
543
544 if (client->irq) {
545 ret = tps6586x_irq_init(tps6586x, client->irq,
546 pdata->irq_base);
547 if (ret) {
548 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
549 return ret;
550 }
551 }
552
553 ret = mfd_add_devices(tps6586x->dev, -1,
554 tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
555 NULL, 0, tps6586x->irq_domain);
556 if (ret < 0) {
557 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
558 goto err_mfd_add;
559 }
560
561 ret = tps6586x_add_subdevs(tps6586x, pdata);
562 if (ret) {
563 dev_err(&client->dev, "add devices failed: %d\n", ret);
564 goto err_add_devs;
565 }
566
567 if (pdata->pm_off && !pm_power_off) {
568 tps6586x_dev = &client->dev;
569 pm_power_off = tps6586x_power_off;
570 }
571
572 return 0;
573
574err_add_devs:
575 mfd_remove_devices(tps6586x->dev);
576err_mfd_add:
577 if (client->irq)
578 free_irq(client->irq, tps6586x);
579 return ret;
580}
581
582static int tps6586x_i2c_remove(struct i2c_client *client)
583{
584 struct tps6586x *tps6586x = i2c_get_clientdata(client);
585
586 tps6586x_remove_subdevs(tps6586x);
587 mfd_remove_devices(tps6586x->dev);
588 if (client->irq)
589 free_irq(client->irq, tps6586x);
590 return 0;
591}
592
593static int __maybe_unused tps6586x_i2c_suspend(struct device *dev)
594{
595 struct tps6586x *tps6586x = dev_get_drvdata(dev);
596
597 if (tps6586x->client->irq)
598 disable_irq(tps6586x->client->irq);
599
600 return 0;
601}
602
603static int __maybe_unused tps6586x_i2c_resume(struct device *dev)
604{
605 struct tps6586x *tps6586x = dev_get_drvdata(dev);
606
607 if (tps6586x->client->irq)
608 enable_irq(tps6586x->client->irq);
609
610 return 0;
611}
612
613static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_i2c_suspend,
614 tps6586x_i2c_resume);
615
616static const struct i2c_device_id tps6586x_id_table[] = {
617 { "tps6586x", 0 },
618 { },
619};
620MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
621
622static struct i2c_driver tps6586x_driver = {
623 .driver = {
624 .name = "tps6586x",
625 .of_match_table = of_match_ptr(tps6586x_of_match),
626 .pm = &tps6586x_pm_ops,
627 },
628 .probe = tps6586x_i2c_probe,
629 .remove = tps6586x_i2c_remove,
630 .id_table = tps6586x_id_table,
631};
632
633static int __init tps6586x_init(void)
634{
635 return i2c_add_driver(&tps6586x_driver);
636}
637subsys_initcall(tps6586x_init);
638
639static void __exit tps6586x_exit(void)
640{
641 i2c_del_driver(&tps6586x_driver);
642}
643module_exit(tps6586x_exit);
644
645MODULE_DESCRIPTION("TPS6586X core driver");
646MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
647MODULE_LICENSE("GPL");
1/*
2 * Core driver for TI TPS6586x PMIC family
3 *
4 * Copyright (c) 2010 CompuLab Ltd.
5 * Mike Rapoport <mike@compulab.co.il>
6 *
7 * Based on da903x.c.
8 * Copyright (C) 2008 Compulab, Ltd.
9 * Mike Rapoport <mike@compulab.co.il>
10 * Copyright (C) 2006-2008 Marvell International Ltd.
11 * Eric Miao <eric.miao@marvell.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
18#include <linux/interrupt.h>
19#include <linux/irq.h>
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/mutex.h>
23#include <linux/slab.h>
24#include <linux/gpio.h>
25#include <linux/i2c.h>
26
27#include <linux/mfd/core.h>
28#include <linux/mfd/tps6586x.h>
29
30/* GPIO control registers */
31#define TPS6586X_GPIOSET1 0x5d
32#define TPS6586X_GPIOSET2 0x5e
33
34/* interrupt control registers */
35#define TPS6586X_INT_ACK1 0xb5
36#define TPS6586X_INT_ACK2 0xb6
37#define TPS6586X_INT_ACK3 0xb7
38#define TPS6586X_INT_ACK4 0xb8
39
40/* interrupt mask registers */
41#define TPS6586X_INT_MASK1 0xb0
42#define TPS6586X_INT_MASK2 0xb1
43#define TPS6586X_INT_MASK3 0xb2
44#define TPS6586X_INT_MASK4 0xb3
45#define TPS6586X_INT_MASK5 0xb4
46
47/* device id */
48#define TPS6586X_VERSIONCRC 0xcd
49
50struct tps6586x_irq_data {
51 u8 mask_reg;
52 u8 mask_mask;
53};
54
55#define TPS6586X_IRQ(_reg, _mask) \
56 { \
57 .mask_reg = (_reg) - TPS6586X_INT_MASK1, \
58 .mask_mask = (_mask), \
59 }
60
61static const struct tps6586x_irq_data tps6586x_irqs[] = {
62 [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
63 [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
64 [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
65 [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
66 [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
67 [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
68 [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
69 [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
70 [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
71 [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
72 [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
73 [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
74 [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
75 [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
76 [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
77 [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
78 [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
79 [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
80 [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
81 [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
82 [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
83 [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
84 [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
85 [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
86 [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
87 [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
88 [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
89};
90
91struct tps6586x {
92 struct mutex lock;
93 struct device *dev;
94 struct i2c_client *client;
95
96 struct gpio_chip gpio;
97 struct irq_chip irq_chip;
98 struct mutex irq_lock;
99 int irq_base;
100 u32 irq_en;
101 u8 mask_cache[5];
102 u8 mask_reg[5];
103};
104
105static inline int __tps6586x_read(struct i2c_client *client,
106 int reg, uint8_t *val)
107{
108 int ret;
109
110 ret = i2c_smbus_read_byte_data(client, reg);
111 if (ret < 0) {
112 dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
113 return ret;
114 }
115
116 *val = (uint8_t)ret;
117
118 return 0;
119}
120
121static inline int __tps6586x_reads(struct i2c_client *client, int reg,
122 int len, uint8_t *val)
123{
124 int ret;
125
126 ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
127 if (ret < 0) {
128 dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
129 return ret;
130 }
131
132 return 0;
133}
134
135static inline int __tps6586x_write(struct i2c_client *client,
136 int reg, uint8_t val)
137{
138 int ret;
139
140 ret = i2c_smbus_write_byte_data(client, reg, val);
141 if (ret < 0) {
142 dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
143 val, reg);
144 return ret;
145 }
146
147 return 0;
148}
149
150static inline int __tps6586x_writes(struct i2c_client *client, int reg,
151 int len, uint8_t *val)
152{
153 int ret, i;
154
155 for (i = 0; i < len; i++) {
156 ret = __tps6586x_write(client, reg + i, *(val + i));
157 if (ret < 0)
158 return ret;
159 }
160
161 return 0;
162}
163
164int tps6586x_write(struct device *dev, int reg, uint8_t val)
165{
166 return __tps6586x_write(to_i2c_client(dev), reg, val);
167}
168EXPORT_SYMBOL_GPL(tps6586x_write);
169
170int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
171{
172 return __tps6586x_writes(to_i2c_client(dev), reg, len, val);
173}
174EXPORT_SYMBOL_GPL(tps6586x_writes);
175
176int tps6586x_read(struct device *dev, int reg, uint8_t *val)
177{
178 return __tps6586x_read(to_i2c_client(dev), reg, val);
179}
180EXPORT_SYMBOL_GPL(tps6586x_read);
181
182int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
183{
184 return __tps6586x_reads(to_i2c_client(dev), reg, len, val);
185}
186EXPORT_SYMBOL_GPL(tps6586x_reads);
187
188int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
189{
190 struct tps6586x *tps6586x = dev_get_drvdata(dev);
191 uint8_t reg_val;
192 int ret = 0;
193
194 mutex_lock(&tps6586x->lock);
195
196 ret = __tps6586x_read(to_i2c_client(dev), reg, ®_val);
197 if (ret)
198 goto out;
199
200 if ((reg_val & bit_mask) == 0) {
201 reg_val |= bit_mask;
202 ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
203 }
204out:
205 mutex_unlock(&tps6586x->lock);
206 return ret;
207}
208EXPORT_SYMBOL_GPL(tps6586x_set_bits);
209
210int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
211{
212 struct tps6586x *tps6586x = dev_get_drvdata(dev);
213 uint8_t reg_val;
214 int ret = 0;
215
216 mutex_lock(&tps6586x->lock);
217
218 ret = __tps6586x_read(to_i2c_client(dev), reg, ®_val);
219 if (ret)
220 goto out;
221
222 if (reg_val & bit_mask) {
223 reg_val &= ~bit_mask;
224 ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
225 }
226out:
227 mutex_unlock(&tps6586x->lock);
228 return ret;
229}
230EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
231
232int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
233{
234 struct tps6586x *tps6586x = dev_get_drvdata(dev);
235 uint8_t reg_val;
236 int ret = 0;
237
238 mutex_lock(&tps6586x->lock);
239
240 ret = __tps6586x_read(tps6586x->client, reg, ®_val);
241 if (ret)
242 goto out;
243
244 if ((reg_val & mask) != val) {
245 reg_val = (reg_val & ~mask) | val;
246 ret = __tps6586x_write(tps6586x->client, reg, reg_val);
247 }
248out:
249 mutex_unlock(&tps6586x->lock);
250 return ret;
251}
252EXPORT_SYMBOL_GPL(tps6586x_update);
253
254static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
255{
256 struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
257 uint8_t val;
258 int ret;
259
260 ret = __tps6586x_read(tps6586x->client, TPS6586X_GPIOSET2, &val);
261 if (ret)
262 return ret;
263
264 return !!(val & (1 << offset));
265}
266
267
268static void tps6586x_gpio_set(struct gpio_chip *chip, unsigned offset,
269 int value)
270{
271 struct tps6586x *tps6586x = container_of(chip, struct tps6586x, gpio);
272
273 tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET2,
274 value << offset, 1 << offset);
275}
276
277static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
278 int value)
279{
280 struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
281 uint8_t val, mask;
282
283 tps6586x_gpio_set(gc, offset, value);
284
285 val = 0x1 << (offset * 2);
286 mask = 0x3 << (offset * 2);
287
288 return tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET1, val, mask);
289}
290
291static int tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base)
292{
293 if (!gpio_base)
294 return 0;
295
296 tps6586x->gpio.owner = THIS_MODULE;
297 tps6586x->gpio.label = tps6586x->client->name;
298 tps6586x->gpio.dev = tps6586x->dev;
299 tps6586x->gpio.base = gpio_base;
300 tps6586x->gpio.ngpio = 4;
301 tps6586x->gpio.can_sleep = 1;
302
303 /* FIXME: add handling of GPIOs as dedicated inputs */
304 tps6586x->gpio.direction_output = tps6586x_gpio_output;
305 tps6586x->gpio.set = tps6586x_gpio_set;
306 tps6586x->gpio.get = tps6586x_gpio_get;
307
308 return gpiochip_add(&tps6586x->gpio);
309}
310
311static int __remove_subdev(struct device *dev, void *unused)
312{
313 platform_device_unregister(to_platform_device(dev));
314 return 0;
315}
316
317static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
318{
319 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
320}
321
322static void tps6586x_irq_lock(struct irq_data *data)
323{
324 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
325
326 mutex_lock(&tps6586x->irq_lock);
327}
328
329static void tps6586x_irq_enable(struct irq_data *irq_data)
330{
331 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
332 unsigned int __irq = irq_data->irq - tps6586x->irq_base;
333 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
334
335 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
336 tps6586x->irq_en |= (1 << __irq);
337}
338
339static void tps6586x_irq_disable(struct irq_data *irq_data)
340{
341 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
342
343 unsigned int __irq = irq_data->irq - tps6586x->irq_base;
344 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
345
346 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
347 tps6586x->irq_en &= ~(1 << __irq);
348}
349
350static void tps6586x_irq_sync_unlock(struct irq_data *data)
351{
352 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
353 int i;
354
355 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
356 if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) {
357 if (!WARN_ON(tps6586x_write(tps6586x->dev,
358 TPS6586X_INT_MASK1 + i,
359 tps6586x->mask_reg[i])))
360 tps6586x->mask_cache[i] = tps6586x->mask_reg[i];
361 }
362 }
363
364 mutex_unlock(&tps6586x->irq_lock);
365}
366
367static irqreturn_t tps6586x_irq(int irq, void *data)
368{
369 struct tps6586x *tps6586x = data;
370 u32 acks;
371 int ret = 0;
372
373 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
374 sizeof(acks), (uint8_t *)&acks);
375
376 if (ret < 0) {
377 dev_err(tps6586x->dev, "failed to read interrupt status\n");
378 return IRQ_NONE;
379 }
380
381 acks = le32_to_cpu(acks);
382
383 while (acks) {
384 int i = __ffs(acks);
385
386 if (tps6586x->irq_en & (1 << i))
387 handle_nested_irq(tps6586x->irq_base + i);
388
389 acks &= ~(1 << i);
390 }
391
392 return IRQ_HANDLED;
393}
394
395static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
396 int irq_base)
397{
398 int i, ret;
399 u8 tmp[4];
400
401 if (!irq_base) {
402 dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
403 return -EINVAL;
404 }
405
406 mutex_init(&tps6586x->irq_lock);
407 for (i = 0; i < 5; i++) {
408 tps6586x->mask_cache[i] = 0xff;
409 tps6586x->mask_reg[i] = 0xff;
410 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
411 }
412
413 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
414
415 tps6586x->irq_base = irq_base;
416
417 tps6586x->irq_chip.name = "tps6586x";
418 tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
419 tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
420 tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
421 tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
422
423 for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
424 int __irq = i + tps6586x->irq_base;
425 irq_set_chip_data(__irq, tps6586x);
426 irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
427 handle_simple_irq);
428 irq_set_nested_thread(__irq, 1);
429#ifdef CONFIG_ARM
430 set_irq_flags(__irq, IRQF_VALID);
431#endif
432 }
433
434 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
435 "tps6586x", tps6586x);
436
437 if (!ret) {
438 device_init_wakeup(tps6586x->dev, 1);
439 enable_irq_wake(irq);
440 }
441
442 return ret;
443}
444
445static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x,
446 struct tps6586x_platform_data *pdata)
447{
448 struct tps6586x_subdev_info *subdev;
449 struct platform_device *pdev;
450 int i, ret = 0;
451
452 for (i = 0; i < pdata->num_subdevs; i++) {
453 subdev = &pdata->subdevs[i];
454
455 pdev = platform_device_alloc(subdev->name, subdev->id);
456 if (!pdev) {
457 ret = -ENOMEM;
458 goto failed;
459 }
460
461 pdev->dev.parent = tps6586x->dev;
462 pdev->dev.platform_data = subdev->platform_data;
463
464 ret = platform_device_add(pdev);
465 if (ret) {
466 platform_device_put(pdev);
467 goto failed;
468 }
469 }
470 return 0;
471
472failed:
473 tps6586x_remove_subdevs(tps6586x);
474 return ret;
475}
476
477static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
478 const struct i2c_device_id *id)
479{
480 struct tps6586x_platform_data *pdata = client->dev.platform_data;
481 struct tps6586x *tps6586x;
482 int ret;
483
484 if (!pdata) {
485 dev_err(&client->dev, "tps6586x requires platform data\n");
486 return -ENOTSUPP;
487 }
488
489 ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
490 if (ret < 0) {
491 dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
492 return -EIO;
493 }
494
495 dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
496
497 tps6586x = kzalloc(sizeof(struct tps6586x), GFP_KERNEL);
498 if (tps6586x == NULL)
499 return -ENOMEM;
500
501 tps6586x->client = client;
502 tps6586x->dev = &client->dev;
503 i2c_set_clientdata(client, tps6586x);
504
505 mutex_init(&tps6586x->lock);
506
507 if (client->irq) {
508 ret = tps6586x_irq_init(tps6586x, client->irq,
509 pdata->irq_base);
510 if (ret) {
511 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
512 goto err_irq_init;
513 }
514 }
515
516 ret = tps6586x_gpio_init(tps6586x, pdata->gpio_base);
517 if (ret) {
518 dev_err(&client->dev, "GPIO registration failed: %d\n", ret);
519 goto err_gpio_init;
520 }
521
522 ret = tps6586x_add_subdevs(tps6586x, pdata);
523 if (ret) {
524 dev_err(&client->dev, "add devices failed: %d\n", ret);
525 goto err_add_devs;
526 }
527
528 return 0;
529
530err_add_devs:
531 if (pdata->gpio_base) {
532 ret = gpiochip_remove(&tps6586x->gpio);
533 if (ret)
534 dev_err(&client->dev, "Can't remove gpio chip: %d\n",
535 ret);
536 }
537err_gpio_init:
538 if (client->irq)
539 free_irq(client->irq, tps6586x);
540err_irq_init:
541 kfree(tps6586x);
542 return ret;
543}
544
545static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
546{
547 struct tps6586x *tps6586x = i2c_get_clientdata(client);
548 struct tps6586x_platform_data *pdata = client->dev.platform_data;
549 int ret;
550
551 if (client->irq)
552 free_irq(client->irq, tps6586x);
553
554 if (pdata->gpio_base) {
555 ret = gpiochip_remove(&tps6586x->gpio);
556 if (ret)
557 dev_err(&client->dev, "Can't remove gpio chip: %d\n",
558 ret);
559 }
560
561 tps6586x_remove_subdevs(tps6586x);
562 kfree(tps6586x);
563 return 0;
564}
565
566static const struct i2c_device_id tps6586x_id_table[] = {
567 { "tps6586x", 0 },
568 { },
569};
570MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
571
572static struct i2c_driver tps6586x_driver = {
573 .driver = {
574 .name = "tps6586x",
575 .owner = THIS_MODULE,
576 },
577 .probe = tps6586x_i2c_probe,
578 .remove = __devexit_p(tps6586x_i2c_remove),
579 .id_table = tps6586x_id_table,
580};
581
582static int __init tps6586x_init(void)
583{
584 return i2c_add_driver(&tps6586x_driver);
585}
586subsys_initcall(tps6586x_init);
587
588static void __exit tps6586x_exit(void)
589{
590 i2c_del_driver(&tps6586x_driver);
591}
592module_exit(tps6586x_exit);
593
594MODULE_DESCRIPTION("TPS6586X core driver");
595MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
596MODULE_LICENSE("GPL");