2 * Base driver for Dialog Semiconductor DA9030/DA9034
4 * Copyright (C) 2008 Compulab, Ltd.
5 * Mike Rapoport <mike@compulab.co.il>
7 * Copyright (C) 2006-2008 Marvell International Ltd.
8 * Eric Miao <eric.miao@marvell.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/interrupt.h>
18 #include <linux/platform_device.h>
19 #include <linux/i2c.h>
20 #include <linux/mfd/da903x.h>
21 #include <linux/slab.h>
23 #define DA9030_CHIP_ID 0x00
24 #define DA9030_EVENT_A 0x01
25 #define DA9030_EVENT_B 0x02
26 #define DA9030_EVENT_C 0x03
27 #define DA9030_STATUS 0x04
28 #define DA9030_IRQ_MASK_A 0x05
29 #define DA9030_IRQ_MASK_B 0x06
30 #define DA9030_IRQ_MASK_C 0x07
31 #define DA9030_SYS_CTRL_A 0x08
32 #define DA9030_SYS_CTRL_B 0x09
33 #define DA9030_FAULT_LOG 0x0a
35 #define DA9034_CHIP_ID 0x00
36 #define DA9034_EVENT_A 0x01
37 #define DA9034_EVENT_B 0x02
38 #define DA9034_EVENT_C 0x03
39 #define DA9034_EVENT_D 0x04
40 #define DA9034_STATUS_A 0x05
41 #define DA9034_STATUS_B 0x06
42 #define DA9034_IRQ_MASK_A 0x07
43 #define DA9034_IRQ_MASK_B 0x08
44 #define DA9034_IRQ_MASK_C 0x09
45 #define DA9034_IRQ_MASK_D 0x0a
46 #define DA9034_SYS_CTRL_A 0x0b
47 #define DA9034_SYS_CTRL_B 0x0c
48 #define DA9034_FAULT_LOG 0x0d
52 struct da903x_chip_ops {
53 int (*init_chip)(struct da903x_chip *);
54 int (*unmask_events)(struct da903x_chip *, unsigned int events);
55 int (*mask_events)(struct da903x_chip *, unsigned int events);
56 int (*read_events)(struct da903x_chip *, unsigned int *events);
57 int (*read_status)(struct da903x_chip *, unsigned int *status);
61 struct i2c_client *client;
63 const struct da903x_chip_ops *ops;
69 struct work_struct irq_work;
71 struct blocking_notifier_head notifier_list;
74 static inline int __da903x_read(struct i2c_client *client,
75 int reg, uint8_t *val)
79 ret = i2c_smbus_read_byte_data(client, reg);
81 dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
89 static inline int __da903x_reads(struct i2c_client *client, int reg,
90 int len, uint8_t *val)
94 ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
96 dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
102 static inline int __da903x_write(struct i2c_client *client,
103 int reg, uint8_t val)
107 ret = i2c_smbus_write_byte_data(client, reg, val);
109 dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
116 static inline int __da903x_writes(struct i2c_client *client, int reg,
117 int len, uint8_t *val)
121 ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
123 dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
129 int da903x_register_notifier(struct device *dev, struct notifier_block *nb,
132 struct da903x_chip *chip = dev_get_drvdata(dev);
134 chip->ops->unmask_events(chip, events);
135 return blocking_notifier_chain_register(&chip->notifier_list, nb);
137 EXPORT_SYMBOL_GPL(da903x_register_notifier);
139 int da903x_unregister_notifier(struct device *dev, struct notifier_block *nb,
142 struct da903x_chip *chip = dev_get_drvdata(dev);
144 chip->ops->mask_events(chip, events);
145 return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
147 EXPORT_SYMBOL_GPL(da903x_unregister_notifier);
149 int da903x_write(struct device *dev, int reg, uint8_t val)
151 return __da903x_write(to_i2c_client(dev), reg, val);
153 EXPORT_SYMBOL_GPL(da903x_write);
155 int da903x_writes(struct device *dev, int reg, int len, uint8_t *val)
157 return __da903x_writes(to_i2c_client(dev), reg, len, val);
159 EXPORT_SYMBOL_GPL(da903x_writes);
161 int da903x_read(struct device *dev, int reg, uint8_t *val)
163 return __da903x_read(to_i2c_client(dev), reg, val);
165 EXPORT_SYMBOL_GPL(da903x_read);
167 int da903x_reads(struct device *dev, int reg, int len, uint8_t *val)
169 return __da903x_reads(to_i2c_client(dev), reg, len, val);
171 EXPORT_SYMBOL_GPL(da903x_reads);
173 int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
175 struct da903x_chip *chip = dev_get_drvdata(dev);
179 mutex_lock(&chip->lock);
181 ret = __da903x_read(chip->client, reg, ®_val);
185 if ((reg_val & bit_mask) != bit_mask) {
187 ret = __da903x_write(chip->client, reg, reg_val);
190 mutex_unlock(&chip->lock);
193 EXPORT_SYMBOL_GPL(da903x_set_bits);
195 int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
197 struct da903x_chip *chip = dev_get_drvdata(dev);
201 mutex_lock(&chip->lock);
203 ret = __da903x_read(chip->client, reg, ®_val);
207 if (reg_val & bit_mask) {
208 reg_val &= ~bit_mask;
209 ret = __da903x_write(chip->client, reg, reg_val);
212 mutex_unlock(&chip->lock);
215 EXPORT_SYMBOL_GPL(da903x_clr_bits);
217 int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
219 struct da903x_chip *chip = dev_get_drvdata(dev);
223 mutex_lock(&chip->lock);
225 ret = __da903x_read(chip->client, reg, ®_val);
229 if ((reg_val & mask) != val) {
230 reg_val = (reg_val & ~mask) | val;
231 ret = __da903x_write(chip->client, reg, reg_val);
234 mutex_unlock(&chip->lock);
237 EXPORT_SYMBOL_GPL(da903x_update);
239 int da903x_query_status(struct device *dev, unsigned int sbits)
241 struct da903x_chip *chip = dev_get_drvdata(dev);
242 unsigned int status = 0;
244 chip->ops->read_status(chip, &status);
245 return ((status & sbits) == sbits);
247 EXPORT_SYMBOL(da903x_query_status);
249 static int da9030_init_chip(struct da903x_chip *chip)
254 err = __da903x_read(chip->client, DA9030_CHIP_ID, &chip_id);
258 err = __da903x_write(chip->client, DA9030_SYS_CTRL_A, 0xE8);
262 dev_info(chip->dev, "DA9030 (CHIP ID: 0x%02x) detected\n", chip_id);
266 static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events)
270 chip->events_mask &= ~events;
272 v[0] = (chip->events_mask & 0xff);
273 v[1] = (chip->events_mask >> 8) & 0xff;
274 v[2] = (chip->events_mask >> 16) & 0xff;
276 return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
279 static int da9030_mask_events(struct da903x_chip *chip, unsigned int events)
283 chip->events_mask |= events;
285 v[0] = (chip->events_mask & 0xff);
286 v[1] = (chip->events_mask >> 8) & 0xff;
287 v[2] = (chip->events_mask >> 16) & 0xff;
289 return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
292 static int da9030_read_events(struct da903x_chip *chip, unsigned int *events)
294 uint8_t v[3] = {0, 0, 0};
297 ret = __da903x_reads(chip->client, DA9030_EVENT_A, 3, v);
301 *events = (v[2] << 16) | (v[1] << 8) | v[0];
305 static int da9030_read_status(struct da903x_chip *chip, unsigned int *status)
307 return __da903x_read(chip->client, DA9030_STATUS, (uint8_t *)status);
310 static int da9034_init_chip(struct da903x_chip *chip)
315 err = __da903x_read(chip->client, DA9034_CHIP_ID, &chip_id);
319 err = __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0xE8);
323 /* avoid SRAM power off during sleep*/
324 __da903x_write(chip->client, 0x10, 0x07);
325 __da903x_write(chip->client, 0x11, 0xff);
326 __da903x_write(chip->client, 0x12, 0xff);
328 /* Enable the ONKEY power down functionality */
329 __da903x_write(chip->client, DA9034_SYS_CTRL_B, 0x20);
330 __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0x60);
332 /* workaround to make LEDs work */
333 __da903x_write(chip->client, 0x90, 0x01);
334 __da903x_write(chip->client, 0xB0, 0x08);
336 /* make ADTV1 and SDTV1 effective */
337 __da903x_write(chip->client, 0x20, 0x00);
339 dev_info(chip->dev, "DA9034 (CHIP ID: 0x%02x) detected\n", chip_id);
343 static int da9034_unmask_events(struct da903x_chip *chip, unsigned int events)
347 chip->events_mask &= ~events;
349 v[0] = (chip->events_mask & 0xff);
350 v[1] = (chip->events_mask >> 8) & 0xff;
351 v[2] = (chip->events_mask >> 16) & 0xff;
352 v[3] = (chip->events_mask >> 24) & 0xff;
354 return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
357 static int da9034_mask_events(struct da903x_chip *chip, unsigned int events)
361 chip->events_mask |= events;
363 v[0] = (chip->events_mask & 0xff);
364 v[1] = (chip->events_mask >> 8) & 0xff;
365 v[2] = (chip->events_mask >> 16) & 0xff;
366 v[3] = (chip->events_mask >> 24) & 0xff;
368 return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
371 static int da9034_read_events(struct da903x_chip *chip, unsigned int *events)
373 uint8_t v[4] = {0, 0, 0, 0};
376 ret = __da903x_reads(chip->client, DA9034_EVENT_A, 4, v);
380 *events = (v[3] << 24) | (v[2] << 16) | (v[1] << 8) | v[0];
384 static int da9034_read_status(struct da903x_chip *chip, unsigned int *status)
386 uint8_t v[2] = {0, 0};
389 ret = __da903x_reads(chip->client, DA9034_STATUS_A, 2, v);
393 *status = (v[1] << 8) | v[0];
397 static void da903x_irq_work(struct work_struct *work)
399 struct da903x_chip *chip =
400 container_of(work, struct da903x_chip, irq_work);
401 unsigned int events = 0;
404 if (chip->ops->read_events(chip, &events))
407 events &= ~chip->events_mask;
411 blocking_notifier_call_chain(
412 &chip->notifier_list, events, NULL);
414 enable_irq(chip->client->irq);
417 static irqreturn_t da903x_irq_handler(int irq, void *data)
419 struct da903x_chip *chip = data;
421 disable_irq_nosync(irq);
422 (void)schedule_work(&chip->irq_work);
427 static const struct da903x_chip_ops da903x_ops[] = {
429 .init_chip = da9030_init_chip,
430 .unmask_events = da9030_unmask_events,
431 .mask_events = da9030_mask_events,
432 .read_events = da9030_read_events,
433 .read_status = da9030_read_status,
436 .init_chip = da9034_init_chip,
437 .unmask_events = da9034_unmask_events,
438 .mask_events = da9034_mask_events,
439 .read_events = da9034_read_events,
440 .read_status = da9034_read_status,
444 static const struct i2c_device_id da903x_id_table[] = {
449 MODULE_DEVICE_TABLE(i2c, da903x_id_table);
451 static int __remove_subdev(struct device *dev, void *unused)
453 platform_device_unregister(to_platform_device(dev));
457 static int da903x_remove_subdevs(struct da903x_chip *chip)
459 return device_for_each_child(chip->dev, NULL, __remove_subdev);
462 static int da903x_add_subdevs(struct da903x_chip *chip,
463 struct da903x_platform_data *pdata)
465 struct da903x_subdev_info *subdev;
466 struct platform_device *pdev;
469 for (i = 0; i < pdata->num_subdevs; i++) {
470 subdev = &pdata->subdevs[i];
472 pdev = platform_device_alloc(subdev->name, subdev->id);
478 pdev->dev.parent = chip->dev;
479 pdev->dev.platform_data = subdev->platform_data;
481 ret = platform_device_add(pdev);
483 platform_device_put(pdev);
490 da903x_remove_subdevs(chip);
494 static int da903x_probe(struct i2c_client *client,
495 const struct i2c_device_id *id)
497 struct da903x_platform_data *pdata = dev_get_platdata(&client->dev);
498 struct da903x_chip *chip;
502 chip = devm_kzalloc(&client->dev, sizeof(struct da903x_chip),
507 chip->client = client;
508 chip->dev = &client->dev;
509 chip->ops = &da903x_ops[id->driver_data];
511 mutex_init(&chip->lock);
512 INIT_WORK(&chip->irq_work, da903x_irq_work);
513 BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
515 i2c_set_clientdata(client, chip);
517 ret = chip->ops->init_chip(chip);
521 /* mask and clear all IRQs */
522 chip->events_mask = 0xffffffff;
523 chip->ops->mask_events(chip, chip->events_mask);
524 chip->ops->read_events(chip, &tmp);
526 ret = devm_request_irq(&client->dev, client->irq, da903x_irq_handler,
527 IRQF_TRIGGER_FALLING,
530 dev_err(&client->dev, "failed to request irq %d\n",
535 return da903x_add_subdevs(chip, pdata);
538 static int da903x_remove(struct i2c_client *client)
540 struct da903x_chip *chip = i2c_get_clientdata(client);
542 da903x_remove_subdevs(chip);
546 static struct i2c_driver da903x_driver = {
550 .probe = da903x_probe,
551 .remove = da903x_remove,
552 .id_table = da903x_id_table,
555 static int __init da903x_init(void)
557 return i2c_add_driver(&da903x_driver);
559 subsys_initcall(da903x_init);
561 static void __exit da903x_exit(void)
563 i2c_del_driver(&da903x_driver);
565 module_exit(da903x_exit);
567 MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034");
568 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
569 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
570 MODULE_LICENSE("GPL v2");