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26b8f5e1 EM |
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 | ||
22 | #define DA9030_CHIP_ID 0x00 | |
23 | #define DA9030_EVENT_A 0x01 | |
24 | #define DA9030_EVENT_B 0x02 | |
25 | #define DA9030_EVENT_C 0x03 | |
26 | #define DA9030_STATUS 0x04 | |
27 | #define DA9030_IRQ_MASK_A 0x05 | |
28 | #define DA9030_IRQ_MASK_B 0x06 | |
29 | #define DA9030_IRQ_MASK_C 0x07 | |
30 | #define DA9030_SYS_CTRL_A 0x08 | |
31 | #define DA9030_SYS_CTRL_B 0x09 | |
32 | #define DA9030_FAULT_LOG 0x0a | |
33 | ||
34 | #define DA9034_CHIP_ID 0x00 | |
35 | #define DA9034_EVENT_A 0x01 | |
36 | #define DA9034_EVENT_B 0x02 | |
37 | #define DA9034_EVENT_C 0x03 | |
38 | #define DA9034_EVENT_D 0x04 | |
39 | #define DA9034_STATUS_A 0x05 | |
40 | #define DA9034_STATUS_B 0x06 | |
41 | #define DA9034_IRQ_MASK_A 0x07 | |
42 | #define DA9034_IRQ_MASK_B 0x08 | |
43 | #define DA9034_IRQ_MASK_C 0x09 | |
44 | #define DA9034_IRQ_MASK_D 0x0a | |
45 | #define DA9034_SYS_CTRL_A 0x0b | |
46 | #define DA9034_SYS_CTRL_B 0x0c | |
47 | #define DA9034_FAULT_LOG 0x0d | |
48 | ||
49 | struct da903x_chip; | |
50 | ||
51 | struct da903x_chip_ops { | |
52 | int (*init_chip)(struct da903x_chip *); | |
53 | int (*unmask_events)(struct da903x_chip *, unsigned int events); | |
54 | int (*mask_events)(struct da903x_chip *, unsigned int events); | |
55 | int (*read_events)(struct da903x_chip *, unsigned int *events); | |
56 | int (*read_status)(struct da903x_chip *, unsigned int *status); | |
57 | }; | |
58 | ||
59 | struct da903x_chip { | |
60 | struct i2c_client *client; | |
61 | struct device *dev; | |
62 | struct da903x_chip_ops *ops; | |
63 | ||
64 | int type; | |
65 | uint32_t events_mask; | |
66 | ||
67 | struct mutex lock; | |
68 | struct work_struct irq_work; | |
69 | ||
70 | struct blocking_notifier_head notifier_list; | |
71 | }; | |
72 | ||
73 | static inline int __da903x_read(struct i2c_client *client, | |
74 | int reg, uint8_t *val) | |
75 | { | |
76 | int ret; | |
77 | ||
78 | ret = i2c_smbus_read_byte_data(client, reg); | |
79 | if (ret < 0) { | |
80 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); | |
81 | return ret; | |
82 | } | |
83 | ||
84 | *val = (uint8_t)ret; | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static inline int __da903x_reads(struct i2c_client *client, int reg, | |
89 | int len, uint8_t *val) | |
90 | { | |
91 | int ret; | |
92 | ||
93 | ret = i2c_smbus_read_i2c_block_data(client, reg, len, val); | |
94 | if (ret < 0) { | |
95 | dev_err(&client->dev, "failed reading from 0x%02x\n", reg); | |
96 | return ret; | |
97 | } | |
98 | return 0; | |
99 | } | |
100 | ||
101 | static inline int __da903x_write(struct i2c_client *client, | |
102 | int reg, uint8_t val) | |
103 | { | |
104 | int ret; | |
105 | ||
106 | ret = i2c_smbus_write_byte_data(client, reg, val); | |
107 | if (ret < 0) { | |
108 | dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n", | |
109 | val, reg); | |
110 | return ret; | |
111 | } | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static inline int __da903x_writes(struct i2c_client *client, int reg, | |
116 | int len, uint8_t *val) | |
117 | { | |
118 | int ret; | |
119 | ||
120 | ret = i2c_smbus_write_i2c_block_data(client, reg, len, val); | |
121 | if (ret < 0) { | |
122 | dev_err(&client->dev, "failed writings to 0x%02x\n", reg); | |
123 | return ret; | |
124 | } | |
125 | return 0; | |
126 | } | |
127 | ||
128 | int da903x_register_notifier(struct device *dev, struct notifier_block *nb, | |
129 | unsigned int events) | |
130 | { | |
131 | struct da903x_chip *chip = dev_get_drvdata(dev); | |
132 | ||
133 | chip->ops->unmask_events(chip, events); | |
134 | return blocking_notifier_chain_register(&chip->notifier_list, nb); | |
135 | } | |
136 | EXPORT_SYMBOL_GPL(da903x_register_notifier); | |
137 | ||
138 | int da903x_unregister_notifier(struct device *dev, struct notifier_block *nb, | |
139 | unsigned int events) | |
140 | { | |
141 | struct da903x_chip *chip = dev_get_drvdata(dev); | |
142 | ||
143 | chip->ops->mask_events(chip, events); | |
144 | return blocking_notifier_chain_unregister(&chip->notifier_list, nb); | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(da903x_unregister_notifier); | |
147 | ||
148 | int da903x_write(struct device *dev, int reg, uint8_t val) | |
149 | { | |
150 | return __da903x_write(to_i2c_client(dev), reg, val); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(da903x_write); | |
153 | ||
856f6fd1 MR |
154 | int da903x_writes(struct device *dev, int reg, int len, uint8_t *val) |
155 | { | |
156 | return __da903x_writes(to_i2c_client(dev), reg, len, val); | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(da903x_writes); | |
159 | ||
26b8f5e1 EM |
160 | int da903x_read(struct device *dev, int reg, uint8_t *val) |
161 | { | |
162 | return __da903x_read(to_i2c_client(dev), reg, val); | |
163 | } | |
164 | EXPORT_SYMBOL_GPL(da903x_read); | |
165 | ||
856f6fd1 MR |
166 | int da903x_reads(struct device *dev, int reg, int len, uint8_t *val) |
167 | { | |
168 | return __da903x_reads(to_i2c_client(dev), reg, len, val); | |
169 | } | |
170 | EXPORT_SYMBOL_GPL(da903x_reads); | |
171 | ||
26b8f5e1 EM |
172 | int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask) |
173 | { | |
174 | struct da903x_chip *chip = dev_get_drvdata(dev); | |
175 | uint8_t reg_val; | |
176 | int ret = 0; | |
177 | ||
178 | mutex_lock(&chip->lock); | |
179 | ||
180 | ret = __da903x_read(chip->client, reg, ®_val); | |
181 | if (ret) | |
182 | goto out; | |
183 | ||
184 | if ((reg_val & bit_mask) == 0) { | |
185 | reg_val |= bit_mask; | |
186 | ret = __da903x_write(chip->client, reg, reg_val); | |
187 | } | |
188 | out: | |
189 | mutex_unlock(&chip->lock); | |
190 | return ret; | |
191 | } | |
192 | EXPORT_SYMBOL_GPL(da903x_set_bits); | |
193 | ||
194 | int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask) | |
195 | { | |
196 | struct da903x_chip *chip = dev_get_drvdata(dev); | |
197 | uint8_t reg_val; | |
198 | int ret = 0; | |
199 | ||
200 | mutex_lock(&chip->lock); | |
201 | ||
202 | ret = __da903x_read(chip->client, reg, ®_val); | |
203 | if (ret) | |
204 | goto out; | |
205 | ||
206 | if (reg_val & bit_mask) { | |
207 | reg_val &= ~bit_mask; | |
208 | ret = __da903x_write(chip->client, reg, reg_val); | |
209 | } | |
210 | out: | |
211 | mutex_unlock(&chip->lock); | |
212 | return ret; | |
213 | } | |
214 | EXPORT_SYMBOL_GPL(da903x_clr_bits); | |
215 | ||
216 | int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask) | |
217 | { | |
218 | struct da903x_chip *chip = dev_get_drvdata(dev); | |
219 | uint8_t reg_val; | |
220 | int ret = 0; | |
221 | ||
222 | mutex_lock(&chip->lock); | |
223 | ||
224 | ret = __da903x_read(chip->client, reg, ®_val); | |
225 | if (ret) | |
226 | goto out; | |
227 | ||
228 | if ((reg_val & mask) != val) { | |
229 | reg_val = (reg_val & ~mask) | val; | |
230 | ret = __da903x_write(chip->client, reg, reg_val); | |
231 | } | |
232 | out: | |
233 | mutex_unlock(&chip->lock); | |
234 | return ret; | |
235 | } | |
236 | EXPORT_SYMBOL_GPL(da903x_update); | |
237 | ||
238 | int da903x_query_status(struct device *dev, unsigned int sbits) | |
239 | { | |
240 | struct da903x_chip *chip = dev_get_drvdata(dev); | |
241 | unsigned int status = 0; | |
242 | ||
243 | chip->ops->read_status(chip, &status); | |
244 | return ((status & sbits) == sbits); | |
245 | } | |
246 | EXPORT_SYMBOL(da903x_query_status); | |
247 | ||
248 | static int __devinit da9030_init_chip(struct da903x_chip *chip) | |
249 | { | |
250 | uint8_t chip_id; | |
251 | int err; | |
252 | ||
253 | err = __da903x_read(chip->client, DA9030_CHIP_ID, &chip_id); | |
254 | if (err) | |
255 | return err; | |
256 | ||
257 | err = __da903x_write(chip->client, DA9030_SYS_CTRL_A, 0xE8); | |
258 | if (err) | |
259 | return err; | |
260 | ||
261 | dev_info(chip->dev, "DA9030 (CHIP ID: 0x%02x) detected\n", chip_id); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events) | |
266 | { | |
267 | uint8_t v[3]; | |
268 | ||
269 | chip->events_mask &= ~events; | |
270 | ||
271 | v[0] = (chip->events_mask & 0xff); | |
272 | v[1] = (chip->events_mask >> 8) & 0xff; | |
273 | v[2] = (chip->events_mask >> 16) & 0xff; | |
274 | ||
275 | return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v); | |
276 | } | |
277 | ||
278 | static int da9030_mask_events(struct da903x_chip *chip, unsigned int events) | |
279 | { | |
280 | uint8_t v[3]; | |
281 | ||
b1ccbdc4 | 282 | chip->events_mask |= events; |
26b8f5e1 EM |
283 | |
284 | v[0] = (chip->events_mask & 0xff); | |
285 | v[1] = (chip->events_mask >> 8) & 0xff; | |
286 | v[2] = (chip->events_mask >> 16) & 0xff; | |
287 | ||
288 | return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v); | |
289 | } | |
290 | ||
291 | static int da9030_read_events(struct da903x_chip *chip, unsigned int *events) | |
292 | { | |
293 | uint8_t v[3] = {0, 0, 0}; | |
294 | int ret; | |
295 | ||
296 | ret = __da903x_reads(chip->client, DA9030_EVENT_A, 3, v); | |
297 | if (ret < 0) | |
298 | return ret; | |
299 | ||
300 | *events = (v[2] << 16) | (v[1] << 8) | v[0]; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static int da9030_read_status(struct da903x_chip *chip, unsigned int *status) | |
305 | { | |
306 | return __da903x_read(chip->client, DA9030_STATUS, (uint8_t *)status); | |
307 | } | |
308 | ||
309 | static int da9034_init_chip(struct da903x_chip *chip) | |
310 | { | |
311 | uint8_t chip_id; | |
312 | int err; | |
313 | ||
314 | err = __da903x_read(chip->client, DA9034_CHIP_ID, &chip_id); | |
315 | if (err) | |
316 | return err; | |
317 | ||
318 | err = __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0xE8); | |
319 | if (err) | |
320 | return err; | |
321 | ||
322 | /* avoid SRAM power off during sleep*/ | |
323 | __da903x_write(chip->client, 0x10, 0x07); | |
324 | __da903x_write(chip->client, 0x11, 0xff); | |
325 | __da903x_write(chip->client, 0x12, 0xff); | |
326 | ||
327 | /* Enable the ONKEY power down functionality */ | |
328 | __da903x_write(chip->client, DA9034_SYS_CTRL_B, 0x20); | |
329 | __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0x60); | |
330 | ||
331 | /* workaround to make LEDs work */ | |
332 | __da903x_write(chip->client, 0x90, 0x01); | |
333 | __da903x_write(chip->client, 0xB0, 0x08); | |
334 | ||
335 | /* make ADTV1 and SDTV1 effective */ | |
336 | __da903x_write(chip->client, 0x20, 0x00); | |
337 | ||
338 | dev_info(chip->dev, "DA9034 (CHIP ID: 0x%02x) detected\n", chip_id); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static int da9034_unmask_events(struct da903x_chip *chip, unsigned int events) | |
343 | { | |
344 | uint8_t v[4]; | |
345 | ||
346 | chip->events_mask &= ~events; | |
347 | ||
348 | v[0] = (chip->events_mask & 0xff); | |
349 | v[1] = (chip->events_mask >> 8) & 0xff; | |
350 | v[2] = (chip->events_mask >> 16) & 0xff; | |
351 | v[3] = (chip->events_mask >> 24) & 0xff; | |
352 | ||
353 | return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v); | |
354 | } | |
355 | ||
356 | static int da9034_mask_events(struct da903x_chip *chip, unsigned int events) | |
357 | { | |
358 | uint8_t v[4]; | |
359 | ||
360 | chip->events_mask |= events; | |
361 | ||
362 | v[0] = (chip->events_mask & 0xff); | |
363 | v[1] = (chip->events_mask >> 8) & 0xff; | |
364 | v[2] = (chip->events_mask >> 16) & 0xff; | |
365 | v[3] = (chip->events_mask >> 24) & 0xff; | |
366 | ||
367 | return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v); | |
368 | } | |
369 | ||
370 | static int da9034_read_events(struct da903x_chip *chip, unsigned int *events) | |
371 | { | |
372 | uint8_t v[4] = {0, 0, 0, 0}; | |
373 | int ret; | |
374 | ||
375 | ret = __da903x_reads(chip->client, DA9034_EVENT_A, 4, v); | |
376 | if (ret < 0) | |
377 | return ret; | |
378 | ||
379 | *events = (v[3] << 24) | (v[2] << 16) | (v[1] << 8) | v[0]; | |
380 | return 0; | |
381 | } | |
382 | ||
383 | static int da9034_read_status(struct da903x_chip *chip, unsigned int *status) | |
384 | { | |
385 | uint8_t v[2] = {0, 0}; | |
386 | int ret = 0; | |
387 | ||
388 | ret = __da903x_reads(chip->client, DA9034_STATUS_A, 2, v); | |
389 | if (ret) | |
390 | return ret; | |
391 | ||
392 | *status = (v[1] << 8) | v[0]; | |
393 | return 0; | |
394 | } | |
395 | ||
396 | static void da903x_irq_work(struct work_struct *work) | |
397 | { | |
398 | struct da903x_chip *chip = | |
399 | container_of(work, struct da903x_chip, irq_work); | |
400 | unsigned int events = 0; | |
401 | ||
402 | while (1) { | |
403 | if (chip->ops->read_events(chip, &events)) | |
404 | break; | |
405 | ||
406 | events &= ~chip->events_mask; | |
407 | if (events == 0) | |
408 | break; | |
409 | ||
410 | blocking_notifier_call_chain( | |
411 | &chip->notifier_list, events, NULL); | |
412 | } | |
413 | enable_irq(chip->client->irq); | |
414 | } | |
415 | ||
fa15ce8a | 416 | static irqreturn_t da903x_irq_handler(int irq, void *data) |
26b8f5e1 EM |
417 | { |
418 | struct da903x_chip *chip = data; | |
419 | ||
420 | disable_irq_nosync(irq); | |
421 | (void)schedule_work(&chip->irq_work); | |
422 | ||
423 | return IRQ_HANDLED; | |
424 | } | |
425 | ||
426 | static struct da903x_chip_ops da903x_ops[] = { | |
427 | [0] = { | |
428 | .init_chip = da9030_init_chip, | |
429 | .unmask_events = da9030_unmask_events, | |
430 | .mask_events = da9030_mask_events, | |
431 | .read_events = da9030_read_events, | |
432 | .read_status = da9030_read_status, | |
433 | }, | |
434 | [1] = { | |
435 | .init_chip = da9034_init_chip, | |
436 | .unmask_events = da9034_unmask_events, | |
437 | .mask_events = da9034_mask_events, | |
438 | .read_events = da9034_read_events, | |
439 | .read_status = da9034_read_status, | |
440 | } | |
441 | }; | |
442 | ||
443 | static const struct i2c_device_id da903x_id_table[] = { | |
444 | { "da9030", 0 }, | |
445 | { "da9034", 1 }, | |
446 | { }, | |
447 | }; | |
448 | MODULE_DEVICE_TABLE(i2c, da903x_id_table); | |
449 | ||
3f874b66 | 450 | static int __remove_subdev(struct device *dev, void *unused) |
26b8f5e1 EM |
451 | { |
452 | platform_device_unregister(to_platform_device(dev)); | |
453 | return 0; | |
454 | } | |
455 | ||
3f874b66 | 456 | static int da903x_remove_subdevs(struct da903x_chip *chip) |
26b8f5e1 EM |
457 | { |
458 | return device_for_each_child(chip->dev, NULL, __remove_subdev); | |
459 | } | |
460 | ||
461 | static int __devinit da903x_add_subdevs(struct da903x_chip *chip, | |
462 | struct da903x_platform_data *pdata) | |
463 | { | |
464 | struct da903x_subdev_info *subdev; | |
465 | struct platform_device *pdev; | |
466 | int i, ret = 0; | |
467 | ||
468 | for (i = 0; i < pdata->num_subdevs; i++) { | |
469 | subdev = &pdata->subdevs[i]; | |
470 | ||
471 | pdev = platform_device_alloc(subdev->name, subdev->id); | |
472 | ||
473 | pdev->dev.parent = chip->dev; | |
474 | pdev->dev.platform_data = subdev->platform_data; | |
475 | ||
476 | ret = platform_device_add(pdev); | |
477 | if (ret) | |
478 | goto failed; | |
479 | } | |
480 | return 0; | |
481 | ||
482 | failed: | |
483 | da903x_remove_subdevs(chip); | |
484 | return ret; | |
485 | } | |
486 | ||
487 | static int __devinit da903x_probe(struct i2c_client *client, | |
488 | const struct i2c_device_id *id) | |
489 | { | |
490 | struct da903x_platform_data *pdata = client->dev.platform_data; | |
491 | struct da903x_chip *chip; | |
492 | unsigned int tmp; | |
493 | int ret; | |
494 | ||
495 | chip = kzalloc(sizeof(struct da903x_chip), GFP_KERNEL); | |
496 | if (chip == NULL) | |
497 | return -ENOMEM; | |
498 | ||
499 | chip->client = client; | |
500 | chip->dev = &client->dev; | |
501 | chip->ops = &da903x_ops[id->driver_data]; | |
502 | ||
503 | mutex_init(&chip->lock); | |
504 | INIT_WORK(&chip->irq_work, da903x_irq_work); | |
505 | BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list); | |
506 | ||
507 | i2c_set_clientdata(client, chip); | |
508 | ||
509 | ret = chip->ops->init_chip(chip); | |
510 | if (ret) | |
511 | goto out_free_chip; | |
512 | ||
513 | /* mask and clear all IRQs */ | |
514 | chip->events_mask = 0xffffffff; | |
515 | chip->ops->mask_events(chip, chip->events_mask); | |
516 | chip->ops->read_events(chip, &tmp); | |
517 | ||
518 | ret = request_irq(client->irq, da903x_irq_handler, | |
519 | IRQF_DISABLED | IRQF_TRIGGER_FALLING, | |
520 | "da903x", chip); | |
521 | if (ret) { | |
522 | dev_err(&client->dev, "failed to request irq %d\n", | |
523 | client->irq); | |
524 | goto out_free_chip; | |
525 | } | |
526 | ||
527 | ret = da903x_add_subdevs(chip, pdata); | |
528 | if (ret) | |
529 | goto out_free_irq; | |
530 | ||
531 | return 0; | |
532 | ||
533 | out_free_irq: | |
534 | free_irq(client->irq, chip); | |
535 | out_free_chip: | |
536 | i2c_set_clientdata(client, NULL); | |
537 | kfree(chip); | |
538 | return ret; | |
539 | } | |
540 | ||
541 | static int __devexit da903x_remove(struct i2c_client *client) | |
542 | { | |
543 | struct da903x_chip *chip = i2c_get_clientdata(client); | |
544 | ||
545 | da903x_remove_subdevs(chip); | |
546 | kfree(chip); | |
547 | return 0; | |
548 | } | |
549 | ||
550 | static struct i2c_driver da903x_driver = { | |
551 | .driver = { | |
552 | .name = "da903x", | |
553 | .owner = THIS_MODULE, | |
554 | }, | |
555 | .probe = da903x_probe, | |
556 | .remove = __devexit_p(da903x_remove), | |
557 | .id_table = da903x_id_table, | |
558 | }; | |
559 | ||
560 | static int __init da903x_init(void) | |
561 | { | |
562 | return i2c_add_driver(&da903x_driver); | |
563 | } | |
2021de87 | 564 | subsys_initcall(da903x_init); |
26b8f5e1 EM |
565 | |
566 | static void __exit da903x_exit(void) | |
567 | { | |
568 | i2c_del_driver(&da903x_driver); | |
569 | } | |
570 | module_exit(da903x_exit); | |
571 | ||
572 | MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034"); | |
573 | MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>" | |
574 | "Mike Rapoport <mike@compulab.co.il>"); | |
575 | MODULE_LICENSE("GPL"); |