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1 | /* |
2 | * Base driver for Dialog Semiconductor DA9030/DA9034 |
3 | * |
4 | * Copyright (C) 2008 Compulab, Ltd. |
5 | * Mike Rapoport <mike@compulab.co.il> |
6 | * |
7 | * Copyright (C) 2006-2008 Marvell International Ltd. |
8 | * Eric Miao <eric.miao@marvell.com> |
9 | * |
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. |
13 | */ |
14 | |
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> |
22 | |
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 |
34 | |
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 |
49 | |
50 | struct da903x_chip; |
51 | |
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); |
58 | }; |
59 | |
60 | struct da903x_chip { |
61 | struct i2c_client *client; |
62 | struct device *dev; |
63 | struct da903x_chip_ops *ops; |
64 | |
65 | int type; |
66 | uint32_t events_mask; |
67 | |
68 | struct mutex lock; |
69 | struct work_struct irq_work; |
70 | |
71 | struct blocking_notifier_head notifier_list; |
72 | }; |
73 | |
74 | static inline int __da903x_read(struct i2c_client *client, |
75 | int reg, uint8_t *val) |
76 | { |
77 | int ret; |
78 | |
79 | ret = i2c_smbus_read_byte_data(client, reg); |
80 | if (ret < 0) { |
81 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); |
82 | return ret; |
83 | } |
84 | |
85 | *val = (uint8_t)ret; |
86 | return 0; |
87 | } |
88 | |
89 | static inline int __da903x_reads(struct i2c_client *client, int reg, |
90 | int len, uint8_t *val) |
91 | { |
92 | int ret; |
93 | |
94 | ret = i2c_smbus_read_i2c_block_data(client, reg, len, val); |
95 | if (ret < 0) { |
96 | dev_err(&client->dev, "failed reading from 0x%02x\n", reg); |
97 | return ret; |
98 | } |
99 | return 0; |
100 | } |
101 | |
102 | static inline int __da903x_write(struct i2c_client *client, |
103 | int reg, uint8_t val) |
104 | { |
105 | int ret; |
106 | |
107 | ret = i2c_smbus_write_byte_data(client, reg, val); |
108 | if (ret < 0) { |
109 | dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n", |
110 | val, reg); |
111 | return ret; |
112 | } |
113 | return 0; |
114 | } |
115 | |
116 | static inline int __da903x_writes(struct i2c_client *client, int reg, |
117 | int len, uint8_t *val) |
118 | { |
119 | int ret; |
120 | |
121 | ret = i2c_smbus_write_i2c_block_data(client, reg, len, val); |
122 | if (ret < 0) { |
123 | dev_err(&client->dev, "failed writings to 0x%02x\n", reg); |
124 | return ret; |
125 | } |
126 | return 0; |
127 | } |
128 | |
129 | int da903x_register_notifier(struct device *dev, struct notifier_block *nb, |
130 | unsigned int events) |
131 | { |
132 | struct da903x_chip *chip = dev_get_drvdata(dev); |
133 | |
134 | chip->ops->unmask_events(chip, events); |
135 | return blocking_notifier_chain_register(&chip->notifier_list, nb); |
136 | } |
137 | EXPORT_SYMBOL_GPL(da903x_register_notifier); |
138 | |
139 | int da903x_unregister_notifier(struct device *dev, struct notifier_block *nb, |
140 | unsigned int events) |
141 | { |
142 | struct da903x_chip *chip = dev_get_drvdata(dev); |
143 | |
144 | chip->ops->mask_events(chip, events); |
145 | return blocking_notifier_chain_unregister(&chip->notifier_list, nb); |
146 | } |
147 | EXPORT_SYMBOL_GPL(da903x_unregister_notifier); |
148 | |
149 | int da903x_write(struct device *dev, int reg, uint8_t val) |
150 | { |
151 | return __da903x_write(to_i2c_client(dev), reg, val); |
152 | } |
153 | EXPORT_SYMBOL_GPL(da903x_write); |
154 | |
155 | int da903x_writes(struct device *dev, int reg, int len, uint8_t *val) |
156 | { |
157 | return __da903x_writes(to_i2c_client(dev), reg, len, val); |
158 | } |
159 | EXPORT_SYMBOL_GPL(da903x_writes); |
160 | |
161 | int da903x_read(struct device *dev, int reg, uint8_t *val) |
162 | { |
163 | return __da903x_read(to_i2c_client(dev), reg, val); |
164 | } |
165 | EXPORT_SYMBOL_GPL(da903x_read); |
166 | |
167 | int da903x_reads(struct device *dev, int reg, int len, uint8_t *val) |
168 | { |
169 | return __da903x_reads(to_i2c_client(dev), reg, len, val); |
170 | } |
171 | EXPORT_SYMBOL_GPL(da903x_reads); |
172 | |
173 | int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask) |
174 | { |
175 | struct da903x_chip *chip = dev_get_drvdata(dev); |
176 | uint8_t reg_val; |
177 | int ret = 0; |
178 | |
179 | mutex_lock(&chip->lock); |
180 | |
181 | ret = __da903x_read(chip->client, reg, ®_val); |
182 | if (ret) |
183 | goto out; |
184 | |
185 | if ((reg_val & bit_mask) != bit_mask) { |
186 | reg_val |= bit_mask; |
187 | ret = __da903x_write(chip->client, reg, reg_val); |
188 | } |
189 | out: |
190 | mutex_unlock(&chip->lock); |
191 | return ret; |
192 | } |
193 | EXPORT_SYMBOL_GPL(da903x_set_bits); |
194 | |
195 | int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask) |
196 | { |
197 | struct da903x_chip *chip = dev_get_drvdata(dev); |
198 | uint8_t reg_val; |
199 | int ret = 0; |
200 | |
201 | mutex_lock(&chip->lock); |
202 | |
203 | ret = __da903x_read(chip->client, reg, ®_val); |
204 | if (ret) |
205 | goto out; |
206 | |
207 | if (reg_val & bit_mask) { |
208 | reg_val &= ~bit_mask; |
209 | ret = __da903x_write(chip->client, reg, reg_val); |
210 | } |
211 | out: |
212 | mutex_unlock(&chip->lock); |
213 | return ret; |
214 | } |
215 | EXPORT_SYMBOL_GPL(da903x_clr_bits); |
216 | |
217 | int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask) |
218 | { |
219 | struct da903x_chip *chip = dev_get_drvdata(dev); |
220 | uint8_t reg_val; |
221 | int ret = 0; |
222 | |
223 | mutex_lock(&chip->lock); |
224 | |
225 | ret = __da903x_read(chip->client, reg, ®_val); |
226 | if (ret) |
227 | goto out; |
228 | |
229 | if ((reg_val & mask) != val) { |
230 | reg_val = (reg_val & ~mask) | val; |
231 | ret = __da903x_write(chip->client, reg, reg_val); |
232 | } |
233 | out: |
234 | mutex_unlock(&chip->lock); |
235 | return ret; |
236 | } |
237 | EXPORT_SYMBOL_GPL(da903x_update); |
238 | |
239 | int da903x_query_status(struct device *dev, unsigned int sbits) |
240 | { |
241 | struct da903x_chip *chip = dev_get_drvdata(dev); |
242 | unsigned int status = 0; |
243 | |
244 | chip->ops->read_status(chip, &status); |
245 | return ((status & sbits) == sbits); |
246 | } |
247 | EXPORT_SYMBOL(da903x_query_status); |
248 | |
249 | static int da9030_init_chip(struct da903x_chip *chip) |
250 | { |
251 | uint8_t chip_id; |
252 | int err; |
253 | |
254 | err = __da903x_read(chip->client, DA9030_CHIP_ID, &chip_id); |
255 | if (err) |
256 | return err; |
257 | |
258 | err = __da903x_write(chip->client, DA9030_SYS_CTRL_A, 0xE8); |
259 | if (err) |
260 | return err; |
261 | |
262 | dev_info(chip->dev, "DA9030 (CHIP ID: 0x%02x) detected\n", chip_id); |
263 | return 0; |
264 | } |
265 | |
266 | static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events) |
267 | { |
268 | uint8_t v[3]; |
269 | |
270 | chip->events_mask &= ~events; |
271 | |
272 | v[0] = (chip->events_mask & 0xff); |
273 | v[1] = (chip->events_mask >> 8) & 0xff; |
274 | v[2] = (chip->events_mask >> 16) & 0xff; |
275 | |
276 | return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v); |
277 | } |
278 | |
279 | static int da9030_mask_events(struct da903x_chip *chip, unsigned int events) |
280 | { |
281 | uint8_t v[3]; |
282 | |
283 | chip->events_mask |= events; |
284 | |
285 | v[0] = (chip->events_mask & 0xff); |
286 | v[1] = (chip->events_mask >> 8) & 0xff; |
287 | v[2] = (chip->events_mask >> 16) & 0xff; |
288 | |
289 | return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v); |
290 | } |
291 | |
292 | static int da9030_read_events(struct da903x_chip *chip, unsigned int *events) |
293 | { |
294 | uint8_t v[3] = {0, 0, 0}; |
295 | int ret; |
296 | |
297 | ret = __da903x_reads(chip->client, DA9030_EVENT_A, 3, v); |
298 | if (ret < 0) |
299 | return ret; |
300 | |
301 | *events = (v[2] << 16) | (v[1] << 8) | v[0]; |
302 | return 0; |
303 | } |
304 | |
305 | static int da9030_read_status(struct da903x_chip *chip, unsigned int *status) |
306 | { |
307 | return __da903x_read(chip->client, DA9030_STATUS, (uint8_t *)status); |
308 | } |
309 | |
310 | static int da9034_init_chip(struct da903x_chip *chip) |
311 | { |
312 | uint8_t chip_id; |
313 | int err; |
314 | |
315 | err = __da903x_read(chip->client, DA9034_CHIP_ID, &chip_id); |
316 | if (err) |
317 | return err; |
318 | |
319 | err = __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0xE8); |
320 | if (err) |
321 | return err; |
322 | |
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); |
327 | |
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); |
331 | |
332 | /* workaround to make LEDs work */ |
333 | __da903x_write(chip->client, 0x90, 0x01); |
334 | __da903x_write(chip->client, 0xB0, 0x08); |
335 | |
336 | /* make ADTV1 and SDTV1 effective */ |
337 | __da903x_write(chip->client, 0x20, 0x00); |
338 | |
339 | dev_info(chip->dev, "DA9034 (CHIP ID: 0x%02x) detected\n", chip_id); |
340 | return 0; |
341 | } |
342 | |
343 | static int da9034_unmask_events(struct da903x_chip *chip, unsigned int events) |
344 | { |
345 | uint8_t v[4]; |
346 | |
347 | chip->events_mask &= ~events; |
348 | |
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; |
353 | |
354 | return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v); |
355 | } |
356 | |
357 | static int da9034_mask_events(struct da903x_chip *chip, unsigned int events) |
358 | { |
359 | uint8_t v[4]; |
360 | |
361 | chip->events_mask |= events; |
362 | |
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; |
367 | |
368 | return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v); |
369 | } |
370 | |
371 | static int da9034_read_events(struct da903x_chip *chip, unsigned int *events) |
372 | { |
373 | uint8_t v[4] = {0, 0, 0, 0}; |
374 | int ret; |
375 | |
376 | ret = __da903x_reads(chip->client, DA9034_EVENT_A, 4, v); |
377 | if (ret < 0) |
378 | return ret; |
379 | |
380 | *events = (v[3] << 24) | (v[2] << 16) | (v[1] << 8) | v[0]; |
381 | return 0; |
382 | } |
383 | |
384 | static int da9034_read_status(struct da903x_chip *chip, unsigned int *status) |
385 | { |
386 | uint8_t v[2] = {0, 0}; |
387 | int ret = 0; |
388 | |
389 | ret = __da903x_reads(chip->client, DA9034_STATUS_A, 2, v); |
390 | if (ret) |
391 | return ret; |
392 | |
393 | *status = (v[1] << 8) | v[0]; |
394 | return 0; |
395 | } |
396 | |
397 | static void da903x_irq_work(struct work_struct *work) |
398 | { |
399 | struct da903x_chip *chip = |
400 | container_of(work, struct da903x_chip, irq_work); |
401 | unsigned int events = 0; |
402 | |
403 | while (1) { |
404 | if (chip->ops->read_events(chip, &events)) |
405 | break; |
406 | |
407 | events &= ~chip->events_mask; |
408 | if (events == 0) |
409 | break; |
410 | |
411 | blocking_notifier_call_chain( |
412 | &chip->notifier_list, events, NULL); |
413 | } |
414 | enable_irq(chip->client->irq); |
415 | } |
416 | |
417 | static irqreturn_t da903x_irq_handler(int irq, void *data) |
418 | { |
419 | struct da903x_chip *chip = data; |
420 | |
421 | disable_irq_nosync(irq); |
422 | (void)schedule_work(&chip->irq_work); |
423 | |
424 | return IRQ_HANDLED; |
425 | } |
426 | |
427 | static struct da903x_chip_ops da903x_ops[] = { |
428 | [0] = { |
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, |
434 | }, |
435 | [1] = { |
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, |
441 | } |
442 | }; |
443 | |
444 | static const struct i2c_device_id da903x_id_table[] = { |
445 | { "da9030", 0 }, |
446 | { "da9034", 1 }, |
447 | { }, |
448 | }; |
449 | MODULE_DEVICE_TABLE(i2c, da903x_id_table); |
450 | |
451 | static int __remove_subdev(struct device *dev, void *unused) |
452 | { |
453 | platform_device_unregister(to_platform_device(dev)); |
454 | return 0; |
455 | } |
456 | |
457 | static int da903x_remove_subdevs(struct da903x_chip *chip) |
458 | { |
459 | return device_for_each_child(chip->dev, NULL, __remove_subdev); |
460 | } |
461 | |
462 | static int da903x_add_subdevs(struct da903x_chip *chip, |
463 | struct da903x_platform_data *pdata) |
464 | { |
465 | struct da903x_subdev_info *subdev; |
466 | struct platform_device *pdev; |
467 | int i, ret = 0; |
468 | |
469 | for (i = 0; i < pdata->num_subdevs; i++) { |
470 | subdev = &pdata->subdevs[i]; |
471 | |
472 | pdev = platform_device_alloc(subdev->name, subdev->id); |
473 | if (!pdev) { |
474 | ret = -ENOMEM; |
475 | goto failed; |
476 | } |
477 | |
478 | pdev->dev.parent = chip->dev; |
479 | pdev->dev.platform_data = subdev->platform_data; |
480 | |
481 | ret = platform_device_add(pdev); |
482 | if (ret) { |
483 | platform_device_put(pdev); |
484 | goto failed; |
485 | } |
486 | } |
487 | return 0; |
488 | |
489 | failed: |
490 | da903x_remove_subdevs(chip); |
491 | return ret; |
492 | } |
493 | |
494 | static int da903x_probe(struct i2c_client *client, |
495 | const struct i2c_device_id *id) |
496 | { |
497 | struct da903x_platform_data *pdata = client->dev.platform_data; |
498 | struct da903x_chip *chip; |
499 | unsigned int tmp; |
500 | int ret; |
501 | |
502 | chip = kzalloc(sizeof(struct da903x_chip), GFP_KERNEL); |
503 | if (chip == NULL) |
504 | return -ENOMEM; |
505 | |
506 | chip->client = client; |
507 | chip->dev = &client->dev; |
508 | chip->ops = &da903x_ops[id->driver_data]; |
509 | |
510 | mutex_init(&chip->lock); |
511 | INIT_WORK(&chip->irq_work, da903x_irq_work); |
512 | BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list); |
513 | |
514 | i2c_set_clientdata(client, chip); |
515 | |
516 | ret = chip->ops->init_chip(chip); |
517 | if (ret) |
518 | goto out_free_chip; |
519 | |
520 | /* mask and clear all IRQs */ |
521 | chip->events_mask = 0xffffffff; |
522 | chip->ops->mask_events(chip, chip->events_mask); |
523 | chip->ops->read_events(chip, &tmp); |
524 | |
525 | ret = request_irq(client->irq, da903x_irq_handler, |
526 | IRQF_TRIGGER_FALLING, |
527 | "da903x", chip); |
528 | if (ret) { |
529 | dev_err(&client->dev, "failed to request irq %d\n", |
530 | client->irq); |
531 | goto out_free_chip; |
532 | } |
533 | |
534 | ret = da903x_add_subdevs(chip, pdata); |
535 | if (ret) |
536 | goto out_free_irq; |
537 | |
538 | return 0; |
539 | |
540 | out_free_irq: |
541 | free_irq(client->irq, chip); |
542 | out_free_chip: |
543 | kfree(chip); |
544 | return ret; |
545 | } |
546 | |
547 | static int da903x_remove(struct i2c_client *client) |
548 | { |
549 | struct da903x_chip *chip = i2c_get_clientdata(client); |
550 | |
551 | da903x_remove_subdevs(chip); |
552 | free_irq(client->irq, chip); |
553 | kfree(chip); |
554 | return 0; |
555 | } |
556 | |
557 | static struct i2c_driver da903x_driver = { |
558 | .driver = { |
559 | .name = "da903x", |
560 | .owner = THIS_MODULE, |
561 | }, |
562 | .probe = da903x_probe, |
563 | .remove = da903x_remove, |
564 | .id_table = da903x_id_table, |
565 | }; |
566 | |
567 | static int __init da903x_init(void) |
568 | { |
569 | return i2c_add_driver(&da903x_driver); |
570 | } |
571 | subsys_initcall(da903x_init); |
572 | |
573 | static void __exit da903x_exit(void) |
574 | { |
575 | i2c_del_driver(&da903x_driver); |
576 | } |
577 | module_exit(da903x_exit); |
578 | |
579 | MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034"); |
580 | MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>" |
581 | "Mike Rapoport <mike@compulab.co.il>"); |
582 | MODULE_LICENSE("GPL"); |
583 |
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