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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
6 * Author: Rabin Vincent <rabin.vincent@stericsson.com>
7 * Author: Mattias Wallin <mattias.wallin@stericsson.com>
8 */
9
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/init.h>
13#include <linux/irq.h>
14#include <linux/irqdomain.h>
15#include <linux/delay.h>
16#include <linux/interrupt.h>
17#include <linux/moduleparam.h>
18#include <linux/platform_device.h>
19#include <linux/mfd/core.h>
20#include <linux/mfd/abx500.h>
21#include <linux/mfd/abx500/ab8500.h>
22#include <linux/mfd/dbx500-prcmu.h>
23#include <linux/of.h>
24
25/*
26 * Interrupt register offsets
27 * Bank : 0x0E
28 */
29#define AB8500_IT_SOURCE1_REG 0x00
30#define AB8500_IT_SOURCE2_REG 0x01
31#define AB8500_IT_SOURCE3_REG 0x02
32#define AB8500_IT_SOURCE4_REG 0x03
33#define AB8500_IT_SOURCE5_REG 0x04
34#define AB8500_IT_SOURCE6_REG 0x05
35#define AB8500_IT_SOURCE7_REG 0x06
36#define AB8500_IT_SOURCE8_REG 0x07
37#define AB9540_IT_SOURCE13_REG 0x0C
38#define AB8500_IT_SOURCE19_REG 0x12
39#define AB8500_IT_SOURCE20_REG 0x13
40#define AB8500_IT_SOURCE21_REG 0x14
41#define AB8500_IT_SOURCE22_REG 0x15
42#define AB8500_IT_SOURCE23_REG 0x16
43#define AB8500_IT_SOURCE24_REG 0x17
44
45/*
46 * latch registers
47 */
48#define AB8500_IT_LATCH1_REG 0x20
49#define AB8500_IT_LATCH2_REG 0x21
50#define AB8500_IT_LATCH3_REG 0x22
51#define AB8500_IT_LATCH4_REG 0x23
52#define AB8500_IT_LATCH5_REG 0x24
53#define AB8500_IT_LATCH6_REG 0x25
54#define AB8500_IT_LATCH7_REG 0x26
55#define AB8500_IT_LATCH8_REG 0x27
56#define AB8500_IT_LATCH9_REG 0x28
57#define AB8500_IT_LATCH10_REG 0x29
58#define AB8500_IT_LATCH12_REG 0x2B
59#define AB9540_IT_LATCH13_REG 0x2C
60#define AB8500_IT_LATCH19_REG 0x32
61#define AB8500_IT_LATCH20_REG 0x33
62#define AB8500_IT_LATCH21_REG 0x34
63#define AB8500_IT_LATCH22_REG 0x35
64#define AB8500_IT_LATCH23_REG 0x36
65#define AB8500_IT_LATCH24_REG 0x37
66
67/*
68 * mask registers
69 */
70
71#define AB8500_IT_MASK1_REG 0x40
72#define AB8500_IT_MASK2_REG 0x41
73#define AB8500_IT_MASK3_REG 0x42
74#define AB8500_IT_MASK4_REG 0x43
75#define AB8500_IT_MASK5_REG 0x44
76#define AB8500_IT_MASK6_REG 0x45
77#define AB8500_IT_MASK7_REG 0x46
78#define AB8500_IT_MASK8_REG 0x47
79#define AB8500_IT_MASK9_REG 0x48
80#define AB8500_IT_MASK10_REG 0x49
81#define AB8500_IT_MASK11_REG 0x4A
82#define AB8500_IT_MASK12_REG 0x4B
83#define AB8500_IT_MASK13_REG 0x4C
84#define AB8500_IT_MASK14_REG 0x4D
85#define AB8500_IT_MASK15_REG 0x4E
86#define AB8500_IT_MASK16_REG 0x4F
87#define AB8500_IT_MASK17_REG 0x50
88#define AB8500_IT_MASK18_REG 0x51
89#define AB8500_IT_MASK19_REG 0x52
90#define AB8500_IT_MASK20_REG 0x53
91#define AB8500_IT_MASK21_REG 0x54
92#define AB8500_IT_MASK22_REG 0x55
93#define AB8500_IT_MASK23_REG 0x56
94#define AB8500_IT_MASK24_REG 0x57
95#define AB8500_IT_MASK25_REG 0x58
96
97/*
98 * latch hierarchy registers
99 */
100#define AB8500_IT_LATCHHIER1_REG 0x60
101#define AB8500_IT_LATCHHIER2_REG 0x61
102#define AB8500_IT_LATCHHIER3_REG 0x62
103#define AB8540_IT_LATCHHIER4_REG 0x63
104
105#define AB8500_IT_LATCHHIER_NUM 3
106#define AB8540_IT_LATCHHIER_NUM 4
107
108#define AB8500_REV_REG 0x80
109#define AB8500_IC_NAME_REG 0x82
110#define AB8500_SWITCH_OFF_STATUS 0x00
111
112#define AB8500_TURN_ON_STATUS 0x00
113#define AB8505_TURN_ON_STATUS_2 0x04
114
115#define AB8500_CH_USBCH_STAT1_REG 0x02
116#define VBUS_DET_DBNC100 0x02
117#define VBUS_DET_DBNC1 0x01
118
119static DEFINE_SPINLOCK(on_stat_lock);
120static u8 turn_on_stat_mask = 0xFF;
121static u8 turn_on_stat_set;
122
123#define AB9540_MODEM_CTRL2_REG 0x23
124#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2)
125
126/*
127 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
128 * numbers are indexed into this array with (num / 8). The interupts are
129 * defined in linux/mfd/ab8500.h
130 *
131 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
132 * offset 0.
133 */
134/* AB8500 support */
135static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
136 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
137};
138
139/* AB9540 / AB8505 support */
140static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
141 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
142};
143
144/* AB8540 support */
145static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
146 0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
147 23, 25, 26, 27, 28, 29, 30, 31,
148};
149
150static const char ab8500_version_str[][7] = {
151 [AB8500_VERSION_AB8500] = "AB8500",
152 [AB8500_VERSION_AB8505] = "AB8505",
153 [AB8500_VERSION_AB9540] = "AB9540",
154 [AB8500_VERSION_AB8540] = "AB8540",
155};
156
157static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
158{
159 int ret;
160
161 ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
162 if (ret < 0)
163 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
164 return ret;
165}
166
167static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
168 u8 data)
169{
170 int ret;
171
172 ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
173 &mask, 1);
174 if (ret < 0)
175 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
176 return ret;
177}
178
179static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
180{
181 int ret;
182 u8 data;
183
184 ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
185 if (ret < 0) {
186 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
187 return ret;
188 }
189 return (int)data;
190}
191
192static int ab8500_get_chip_id(struct device *dev)
193{
194 struct ab8500 *ab8500;
195
196 if (!dev)
197 return -EINVAL;
198 ab8500 = dev_get_drvdata(dev->parent);
199 return ab8500 ? (int)ab8500->chip_id : -EINVAL;
200}
201
202static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
203 u8 reg, u8 data)
204{
205 int ret;
206 /*
207 * Put the u8 bank and u8 register together into a an u16.
208 * The bank on higher 8 bits and register in lower 8 bits.
209 */
210 u16 addr = ((u16)bank) << 8 | reg;
211
212 dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
213
214 mutex_lock(&ab8500->lock);
215
216 ret = ab8500->write(ab8500, addr, data);
217 if (ret < 0)
218 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
219 addr, ret);
220 mutex_unlock(&ab8500->lock);
221
222 return ret;
223}
224
225static int ab8500_set_register(struct device *dev, u8 bank,
226 u8 reg, u8 value)
227{
228 int ret;
229 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
230
231 atomic_inc(&ab8500->transfer_ongoing);
232 ret = set_register_interruptible(ab8500, bank, reg, value);
233 atomic_dec(&ab8500->transfer_ongoing);
234 return ret;
235}
236
237static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
238 u8 reg, u8 *value)
239{
240 int ret;
241 u16 addr = ((u16)bank) << 8 | reg;
242
243 mutex_lock(&ab8500->lock);
244
245 ret = ab8500->read(ab8500, addr);
246 if (ret < 0)
247 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
248 addr, ret);
249 else
250 *value = ret;
251
252 mutex_unlock(&ab8500->lock);
253 dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
254
255 return (ret < 0) ? ret : 0;
256}
257
258static int ab8500_get_register(struct device *dev, u8 bank,
259 u8 reg, u8 *value)
260{
261 int ret;
262 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
263
264 atomic_inc(&ab8500->transfer_ongoing);
265 ret = get_register_interruptible(ab8500, bank, reg, value);
266 atomic_dec(&ab8500->transfer_ongoing);
267 return ret;
268}
269
270static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
271 u8 reg, u8 bitmask, u8 bitvalues)
272{
273 int ret;
274 u16 addr = ((u16)bank) << 8 | reg;
275
276 mutex_lock(&ab8500->lock);
277
278 if (ab8500->write_masked == NULL) {
279 u8 data;
280
281 ret = ab8500->read(ab8500, addr);
282 if (ret < 0) {
283 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
284 addr, ret);
285 goto out;
286 }
287
288 data = (u8)ret;
289 data = (~bitmask & data) | (bitmask & bitvalues);
290
291 ret = ab8500->write(ab8500, addr, data);
292 if (ret < 0)
293 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
294 addr, ret);
295
296 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
297 data);
298 goto out;
299 }
300 ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
301 if (ret < 0)
302 dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
303 ret);
304out:
305 mutex_unlock(&ab8500->lock);
306 return ret;
307}
308
309static int ab8500_mask_and_set_register(struct device *dev,
310 u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
311{
312 int ret;
313 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
314
315 atomic_inc(&ab8500->transfer_ongoing);
316 ret = mask_and_set_register_interruptible(ab8500, bank, reg,
317 bitmask, bitvalues);
318 atomic_dec(&ab8500->transfer_ongoing);
319 return ret;
320}
321
322static struct abx500_ops ab8500_ops = {
323 .get_chip_id = ab8500_get_chip_id,
324 .get_register = ab8500_get_register,
325 .set_register = ab8500_set_register,
326 .get_register_page = NULL,
327 .set_register_page = NULL,
328 .mask_and_set_register = ab8500_mask_and_set_register,
329 .event_registers_startup_state_get = NULL,
330 .startup_irq_enabled = NULL,
331 .dump_all_banks = ab8500_dump_all_banks,
332};
333
334static void ab8500_irq_lock(struct irq_data *data)
335{
336 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
337
338 mutex_lock(&ab8500->irq_lock);
339 atomic_inc(&ab8500->transfer_ongoing);
340}
341
342static void ab8500_irq_sync_unlock(struct irq_data *data)
343{
344 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
345 int i;
346
347 for (i = 0; i < ab8500->mask_size; i++) {
348 u8 old = ab8500->oldmask[i];
349 u8 new = ab8500->mask[i];
350 int reg;
351
352 if (new == old)
353 continue;
354
355 /*
356 * Interrupt register 12 doesn't exist prior to AB8500 version
357 * 2.0
358 */
359 if (ab8500->irq_reg_offset[i] == 11 &&
360 is_ab8500_1p1_or_earlier(ab8500))
361 continue;
362
363 if (ab8500->irq_reg_offset[i] < 0)
364 continue;
365
366 ab8500->oldmask[i] = new;
367
368 reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
369 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
370 }
371 atomic_dec(&ab8500->transfer_ongoing);
372 mutex_unlock(&ab8500->irq_lock);
373}
374
375static void ab8500_irq_mask(struct irq_data *data)
376{
377 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
378 int offset = data->hwirq;
379 int index = offset / 8;
380 int mask = 1 << (offset % 8);
381
382 ab8500->mask[index] |= mask;
383
384 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
385 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
386 ab8500->mask[index + 2] |= mask;
387 if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
388 ab8500->mask[index + 1] |= mask;
389 if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
390 /* Here the falling IRQ is one bit lower */
391 ab8500->mask[index] |= (mask << 1);
392}
393
394static void ab8500_irq_unmask(struct irq_data *data)
395{
396 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
397 unsigned int type = irqd_get_trigger_type(data);
398 int offset = data->hwirq;
399 int index = offset / 8;
400 int mask = 1 << (offset % 8);
401
402 if (type & IRQ_TYPE_EDGE_RISING)
403 ab8500->mask[index] &= ~mask;
404
405 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
406 if (type & IRQ_TYPE_EDGE_FALLING) {
407 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
408 ab8500->mask[index + 2] &= ~mask;
409 else if (offset >= AB9540_INT_GPIO50R &&
410 offset <= AB9540_INT_GPIO54R)
411 ab8500->mask[index + 1] &= ~mask;
412 else if (offset == AB8540_INT_GPIO43R ||
413 offset == AB8540_INT_GPIO44R)
414 /* Here the falling IRQ is one bit lower */
415 ab8500->mask[index] &= ~(mask << 1);
416 else
417 ab8500->mask[index] &= ~mask;
418 } else {
419 /* Satisfies the case where type is not set. */
420 ab8500->mask[index] &= ~mask;
421 }
422}
423
424static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
425{
426 return 0;
427}
428
429static struct irq_chip ab8500_irq_chip = {
430 .name = "ab8500",
431 .irq_bus_lock = ab8500_irq_lock,
432 .irq_bus_sync_unlock = ab8500_irq_sync_unlock,
433 .irq_mask = ab8500_irq_mask,
434 .irq_disable = ab8500_irq_mask,
435 .irq_unmask = ab8500_irq_unmask,
436 .irq_set_type = ab8500_irq_set_type,
437};
438
439static void update_latch_offset(u8 *offset, int i)
440{
441 /* Fix inconsistent ITFromLatch25 bit mapping... */
442 if (unlikely(*offset == 17))
443 *offset = 24;
444 /* Fix inconsistent ab8540 bit mapping... */
445 if (unlikely(*offset == 16))
446 *offset = 25;
447 if ((i == 3) && (*offset >= 24))
448 *offset += 2;
449}
450
451static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
452 int latch_offset, u8 latch_val)
453{
454 int int_bit, line, i;
455
456 for (i = 0; i < ab8500->mask_size; i++)
457 if (ab8500->irq_reg_offset[i] == latch_offset)
458 break;
459
460 if (i >= ab8500->mask_size) {
461 dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
462 latch_offset);
463 return -ENXIO;
464 }
465
466 /* ignore masked out interrupts */
467 latch_val &= ~ab8500->mask[i];
468
469 while (latch_val) {
470 int_bit = __ffs(latch_val);
471 line = (i << 3) + int_bit;
472 latch_val &= ~(1 << int_bit);
473
474 /*
475 * This handles the falling edge hwirqs from the GPIO
476 * lines. Route them back to the line registered for the
477 * rising IRQ, as this is merely a flag for the same IRQ
478 * in linux terms.
479 */
480 if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
481 line -= 16;
482 if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
483 line -= 8;
484 if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
485 line += 1;
486
487 handle_nested_irq(irq_find_mapping(ab8500->domain, line));
488 }
489
490 return 0;
491}
492
493static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
494 int hier_offset, u8 hier_val)
495{
496 int latch_bit, status;
497 u8 latch_offset, latch_val;
498
499 do {
500 latch_bit = __ffs(hier_val);
501 latch_offset = (hier_offset << 3) + latch_bit;
502
503 update_latch_offset(&latch_offset, hier_offset);
504
505 status = get_register_interruptible(ab8500,
506 AB8500_INTERRUPT,
507 AB8500_IT_LATCH1_REG + latch_offset,
508 &latch_val);
509 if (status < 0 || latch_val == 0)
510 goto discard;
511
512 status = ab8500_handle_hierarchical_line(ab8500,
513 latch_offset, latch_val);
514 if (status < 0)
515 return status;
516discard:
517 hier_val &= ~(1 << latch_bit);
518 } while (hier_val);
519
520 return 0;
521}
522
523static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
524{
525 struct ab8500 *ab8500 = dev;
526 u8 i;
527
528 dev_vdbg(ab8500->dev, "interrupt\n");
529
530 /* Hierarchical interrupt version */
531 for (i = 0; i < (ab8500->it_latchhier_num); i++) {
532 int status;
533 u8 hier_val;
534
535 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
536 AB8500_IT_LATCHHIER1_REG + i, &hier_val);
537 if (status < 0 || hier_val == 0)
538 continue;
539
540 status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
541 if (status < 0)
542 break;
543 }
544 return IRQ_HANDLED;
545}
546
547static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
548 irq_hw_number_t hwirq)
549{
550 struct ab8500 *ab8500 = d->host_data;
551
552 if (!ab8500)
553 return -EINVAL;
554
555 irq_set_chip_data(virq, ab8500);
556 irq_set_chip_and_handler(virq, &ab8500_irq_chip,
557 handle_simple_irq);
558 irq_set_nested_thread(virq, 1);
559 irq_set_noprobe(virq);
560
561 return 0;
562}
563
564static const struct irq_domain_ops ab8500_irq_ops = {
565 .map = ab8500_irq_map,
566 .xlate = irq_domain_xlate_twocell,
567};
568
569static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
570{
571 int num_irqs;
572
573 if (is_ab8540(ab8500))
574 num_irqs = AB8540_NR_IRQS;
575 else if (is_ab9540(ab8500))
576 num_irqs = AB9540_NR_IRQS;
577 else if (is_ab8505(ab8500))
578 num_irqs = AB8505_NR_IRQS;
579 else
580 num_irqs = AB8500_NR_IRQS;
581
582 /* If ->irq_base is zero this will give a linear mapping */
583 ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
584 num_irqs, 0,
585 &ab8500_irq_ops, ab8500);
586
587 if (!ab8500->domain) {
588 dev_err(ab8500->dev, "Failed to create irqdomain\n");
589 return -ENODEV;
590 }
591
592 return 0;
593}
594
595int ab8500_suspend(struct ab8500 *ab8500)
596{
597 if (atomic_read(&ab8500->transfer_ongoing))
598 return -EINVAL;
599
600 return 0;
601}
602
603static const struct mfd_cell ab8500_bm_devs[] = {
604 MFD_CELL_OF("ab8500-charger", NULL, NULL, 0, 0,
605 "stericsson,ab8500-charger"),
606 MFD_CELL_OF("ab8500-btemp", NULL, NULL, 0, 0,
607 "stericsson,ab8500-btemp"),
608 MFD_CELL_OF("ab8500-fg", NULL, NULL, 0, 0,
609 "stericsson,ab8500-fg"),
610 MFD_CELL_OF("ab8500-chargalg", NULL, NULL, 0, 0,
611 "stericsson,ab8500-chargalg"),
612};
613
614static const struct mfd_cell ab8500_devs[] = {
615 MFD_CELL_OF("ab8500-sysctrl",
616 NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"),
617 MFD_CELL_OF("ab8500-ext-regulator",
618 NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"),
619 MFD_CELL_OF("ab8500-regulator",
620 NULL, NULL, 0, 0, "stericsson,ab8500-regulator"),
621 MFD_CELL_OF("ab8500-clk",
622 NULL, NULL, 0, 0, "stericsson,ab8500-clk"),
623 MFD_CELL_OF("ab8500-gpadc",
624 NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"),
625 MFD_CELL_OF("ab8500-rtc",
626 NULL, NULL, 0, 0, "stericsson,ab8500-rtc"),
627 MFD_CELL_OF("ab8500-acc-det",
628 NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"),
629 MFD_CELL_OF("ab8500-poweron-key",
630 NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"),
631 MFD_CELL_OF("ab8500-pwm",
632 NULL, NULL, 0, 1, "stericsson,ab8500-pwm"),
633 MFD_CELL_OF("ab8500-pwm",
634 NULL, NULL, 0, 2, "stericsson,ab8500-pwm"),
635 MFD_CELL_OF("ab8500-pwm",
636 NULL, NULL, 0, 3, "stericsson,ab8500-pwm"),
637 MFD_CELL_OF("ab8500-denc",
638 NULL, NULL, 0, 0, "stericsson,ab8500-denc"),
639 MFD_CELL_OF("pinctrl-ab8500",
640 NULL, NULL, 0, 0, "stericsson,ab8500-gpio"),
641 MFD_CELL_OF("abx500-temp",
642 NULL, NULL, 0, 0, "stericsson,abx500-temp"),
643 MFD_CELL_OF("ab8500-usb",
644 NULL, NULL, 0, 0, "stericsson,ab8500-usb"),
645 MFD_CELL_OF("ab8500-codec",
646 NULL, NULL, 0, 0, "stericsson,ab8500-codec"),
647};
648
649static const struct mfd_cell ab9540_devs[] = {
650 {
651 .name = "ab8500-sysctrl",
652 },
653 {
654 .name = "ab8500-ext-regulator",
655 },
656 {
657 .name = "ab8500-regulator",
658 },
659 {
660 .name = "abx500-clk",
661 .of_compatible = "stericsson,abx500-clk",
662 },
663 {
664 .name = "ab8500-gpadc",
665 .of_compatible = "stericsson,ab8500-gpadc",
666 },
667 {
668 .name = "ab8500-rtc",
669 },
670 {
671 .name = "ab8500-acc-det",
672 },
673 {
674 .name = "ab8500-poweron-key",
675 },
676 {
677 .name = "ab8500-pwm",
678 .id = 1,
679 },
680 {
681 .name = "abx500-temp",
682 },
683 {
684 .name = "pinctrl-ab9540",
685 .of_compatible = "stericsson,ab9540-gpio",
686 },
687 {
688 .name = "ab9540-usb",
689 },
690 {
691 .name = "ab9540-codec",
692 },
693 {
694 .name = "ab-iddet",
695 },
696};
697
698/* Device list for ab8505 */
699static const struct mfd_cell ab8505_devs[] = {
700 {
701 .name = "ab8500-sysctrl",
702 .of_compatible = "stericsson,ab8500-sysctrl",
703 },
704 {
705 .name = "ab8500-regulator",
706 .of_compatible = "stericsson,ab8505-regulator",
707 },
708 {
709 .name = "abx500-clk",
710 .of_compatible = "stericsson,ab8500-clk",
711 },
712 {
713 .name = "ab8500-gpadc",
714 .of_compatible = "stericsson,ab8500-gpadc",
715 },
716 {
717 .name = "ab8500-rtc",
718 .of_compatible = "stericsson,ab8500-rtc",
719 },
720 {
721 .name = "ab8500-acc-det",
722 .of_compatible = "stericsson,ab8500-acc-det",
723 },
724 {
725 .name = "ab8500-poweron-key",
726 .of_compatible = "stericsson,ab8500-poweron-key",
727 },
728 {
729 .name = "ab8500-pwm",
730 .of_compatible = "stericsson,ab8500-pwm",
731 .id = 1,
732 },
733 {
734 .name = "pinctrl-ab8505",
735 .of_compatible = "stericsson,ab8505-gpio",
736 },
737 {
738 .name = "ab8500-usb",
739 .of_compatible = "stericsson,ab8500-usb",
740 },
741 {
742 .name = "ab8500-codec",
743 .of_compatible = "stericsson,ab8500-codec",
744 },
745 {
746 .name = "ab-iddet",
747 },
748};
749
750static const struct mfd_cell ab8540_devs[] = {
751 {
752 .name = "ab8500-sysctrl",
753 },
754 {
755 .name = "ab8500-ext-regulator",
756 },
757 {
758 .name = "ab8500-regulator",
759 },
760 {
761 .name = "abx500-clk",
762 .of_compatible = "stericsson,abx500-clk",
763 },
764 {
765 .name = "ab8500-gpadc",
766 .of_compatible = "stericsson,ab8500-gpadc",
767 },
768 {
769 .name = "ab8500-acc-det",
770 },
771 {
772 .name = "ab8500-poweron-key",
773 },
774 {
775 .name = "ab8500-pwm",
776 .id = 1,
777 },
778 {
779 .name = "abx500-temp",
780 },
781 {
782 .name = "pinctrl-ab8540",
783 },
784 {
785 .name = "ab8540-usb",
786 },
787 {
788 .name = "ab8540-codec",
789 },
790 {
791 .name = "ab-iddet",
792 },
793};
794
795static const struct mfd_cell ab8540_cut1_devs[] = {
796 {
797 .name = "ab8500-rtc",
798 .of_compatible = "stericsson,ab8500-rtc",
799 },
800};
801
802static const struct mfd_cell ab8540_cut2_devs[] = {
803 {
804 .name = "ab8540-rtc",
805 .of_compatible = "stericsson,ab8540-rtc",
806 },
807};
808
809static ssize_t chip_id_show(struct device *dev,
810 struct device_attribute *attr, char *buf)
811{
812 struct ab8500 *ab8500;
813
814 ab8500 = dev_get_drvdata(dev);
815
816 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
817}
818
819/*
820 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
821 * 0x01 Swoff bit programming
822 * 0x02 Thermal protection activation
823 * 0x04 Vbat lower then BattOk falling threshold
824 * 0x08 Watchdog expired
825 * 0x10 Non presence of 32kHz clock
826 * 0x20 Battery level lower than power on reset threshold
827 * 0x40 Power on key 1 pressed longer than 10 seconds
828 * 0x80 DB8500 thermal shutdown
829 */
830static ssize_t switch_off_status_show(struct device *dev,
831 struct device_attribute *attr, char *buf)
832{
833 int ret;
834 u8 value;
835 struct ab8500 *ab8500;
836
837 ab8500 = dev_get_drvdata(dev);
838 ret = get_register_interruptible(ab8500, AB8500_RTC,
839 AB8500_SWITCH_OFF_STATUS, &value);
840 if (ret < 0)
841 return ret;
842 return sprintf(buf, "%#x\n", value);
843}
844
845/* use mask and set to override the register turn_on_stat value */
846void ab8500_override_turn_on_stat(u8 mask, u8 set)
847{
848 spin_lock(&on_stat_lock);
849 turn_on_stat_mask = mask;
850 turn_on_stat_set = set;
851 spin_unlock(&on_stat_lock);
852}
853
854/*
855 * ab8500 has turned on due to (TURN_ON_STATUS):
856 * 0x01 PORnVbat
857 * 0x02 PonKey1dbF
858 * 0x04 PonKey2dbF
859 * 0x08 RTCAlarm
860 * 0x10 MainChDet
861 * 0x20 VbusDet
862 * 0x40 UsbIDDetect
863 * 0x80 Reserved
864 */
865static ssize_t turn_on_status_show(struct device *dev,
866 struct device_attribute *attr, char *buf)
867{
868 int ret;
869 u8 value;
870 struct ab8500 *ab8500;
871
872 ab8500 = dev_get_drvdata(dev);
873 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
874 AB8500_TURN_ON_STATUS, &value);
875 if (ret < 0)
876 return ret;
877
878 /*
879 * In L9540, turn_on_status register is not updated correctly if
880 * the device is rebooted with AC/USB charger connected. Due to
881 * this, the device boots android instead of entering into charge
882 * only mode. Read the AC/USB status register to detect the charger
883 * presence and update the turn on status manually.
884 */
885 if (is_ab9540(ab8500)) {
886 spin_lock(&on_stat_lock);
887 value = (value & turn_on_stat_mask) | turn_on_stat_set;
888 spin_unlock(&on_stat_lock);
889 }
890
891 return sprintf(buf, "%#x\n", value);
892}
893
894static ssize_t turn_on_status_2_show(struct device *dev,
895 struct device_attribute *attr, char *buf)
896{
897 int ret;
898 u8 value;
899 struct ab8500 *ab8500;
900
901 ab8500 = dev_get_drvdata(dev);
902 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
903 AB8505_TURN_ON_STATUS_2, &value);
904 if (ret < 0)
905 return ret;
906 return sprintf(buf, "%#x\n", (value & 0x1));
907}
908
909static ssize_t dbbrstn_show(struct device *dev,
910 struct device_attribute *attr, char *buf)
911{
912 struct ab8500 *ab8500;
913 int ret;
914 u8 value;
915
916 ab8500 = dev_get_drvdata(dev);
917
918 ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
919 AB9540_MODEM_CTRL2_REG, &value);
920 if (ret < 0)
921 return ret;
922
923 return sprintf(buf, "%d\n",
924 (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
925}
926
927static ssize_t dbbrstn_store(struct device *dev,
928 struct device_attribute *attr, const char *buf, size_t count)
929{
930 struct ab8500 *ab8500;
931 int ret = count;
932 int err;
933 u8 bitvalues;
934
935 ab8500 = dev_get_drvdata(dev);
936
937 if (count > 0) {
938 switch (buf[0]) {
939 case '0':
940 bitvalues = 0;
941 break;
942 case '1':
943 bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
944 break;
945 default:
946 goto exit;
947 }
948
949 err = mask_and_set_register_interruptible(ab8500,
950 AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
951 AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
952 if (err)
953 dev_info(ab8500->dev,
954 "Failed to set DBBRSTN %c, err %#x\n",
955 buf[0], err);
956 }
957
958exit:
959 return ret;
960}
961
962static DEVICE_ATTR_RO(chip_id);
963static DEVICE_ATTR_RO(switch_off_status);
964static DEVICE_ATTR_RO(turn_on_status);
965static DEVICE_ATTR_RO(turn_on_status_2);
966static DEVICE_ATTR_RW(dbbrstn);
967
968static struct attribute *ab8500_sysfs_entries[] = {
969 &dev_attr_chip_id.attr,
970 &dev_attr_switch_off_status.attr,
971 &dev_attr_turn_on_status.attr,
972 NULL,
973};
974
975static struct attribute *ab8505_sysfs_entries[] = {
976 &dev_attr_turn_on_status_2.attr,
977 NULL,
978};
979
980static struct attribute *ab9540_sysfs_entries[] = {
981 &dev_attr_chip_id.attr,
982 &dev_attr_switch_off_status.attr,
983 &dev_attr_turn_on_status.attr,
984 &dev_attr_dbbrstn.attr,
985 NULL,
986};
987
988static const struct attribute_group ab8500_attr_group = {
989 .attrs = ab8500_sysfs_entries,
990};
991
992static const struct attribute_group ab8505_attr_group = {
993 .attrs = ab8505_sysfs_entries,
994};
995
996static const struct attribute_group ab9540_attr_group = {
997 .attrs = ab9540_sysfs_entries,
998};
999
1000static int ab8500_probe(struct platform_device *pdev)
1001{
1002 static const char * const switch_off_status[] = {
1003 "Swoff bit programming",
1004 "Thermal protection activation",
1005 "Vbat lower then BattOk falling threshold",
1006 "Watchdog expired",
1007 "Non presence of 32kHz clock",
1008 "Battery level lower than power on reset threshold",
1009 "Power on key 1 pressed longer than 10 seconds",
1010 "DB8500 thermal shutdown"};
1011 static const char * const turn_on_status[] = {
1012 "Battery rising (Vbat)",
1013 "Power On Key 1 dbF",
1014 "Power On Key 2 dbF",
1015 "RTC Alarm",
1016 "Main Charger Detect",
1017 "Vbus Detect (USB)",
1018 "USB ID Detect",
1019 "UART Factory Mode Detect"};
1020 const struct platform_device_id *platid = platform_get_device_id(pdev);
1021 enum ab8500_version version = AB8500_VERSION_UNDEFINED;
1022 struct device_node *np = pdev->dev.of_node;
1023 struct ab8500 *ab8500;
1024 int ret;
1025 int i;
1026 int irq;
1027 u8 value;
1028
1029 ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
1030 if (!ab8500)
1031 return -ENOMEM;
1032
1033 ab8500->dev = &pdev->dev;
1034
1035 irq = platform_get_irq(pdev, 0);
1036 if (irq < 0)
1037 return irq;
1038
1039 ab8500->irq = irq;
1040
1041 ab8500->read = ab8500_prcmu_read;
1042 ab8500->write = ab8500_prcmu_write;
1043 ab8500->write_masked = ab8500_prcmu_write_masked;
1044
1045 mutex_init(&ab8500->lock);
1046 mutex_init(&ab8500->irq_lock);
1047 atomic_set(&ab8500->transfer_ongoing, 0);
1048
1049 platform_set_drvdata(pdev, ab8500);
1050
1051 if (platid)
1052 version = platid->driver_data;
1053
1054 if (version != AB8500_VERSION_UNDEFINED)
1055 ab8500->version = version;
1056 else {
1057 ret = get_register_interruptible(ab8500, AB8500_MISC,
1058 AB8500_IC_NAME_REG, &value);
1059 if (ret < 0) {
1060 dev_err(&pdev->dev, "could not probe HW\n");
1061 return ret;
1062 }
1063
1064 ab8500->version = value;
1065 }
1066
1067 ret = get_register_interruptible(ab8500, AB8500_MISC,
1068 AB8500_REV_REG, &value);
1069 if (ret < 0)
1070 return ret;
1071
1072 ab8500->chip_id = value;
1073
1074 dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
1075 ab8500_version_str[ab8500->version],
1076 ab8500->chip_id >> 4,
1077 ab8500->chip_id & 0x0F);
1078
1079 /* Configure AB8540 */
1080 if (is_ab8540(ab8500)) {
1081 ab8500->mask_size = AB8540_NUM_IRQ_REGS;
1082 ab8500->irq_reg_offset = ab8540_irq_regoffset;
1083 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
1084 } /* Configure AB8500 or AB9540 IRQ */
1085 else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
1086 ab8500->mask_size = AB9540_NUM_IRQ_REGS;
1087 ab8500->irq_reg_offset = ab9540_irq_regoffset;
1088 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1089 } else {
1090 ab8500->mask_size = AB8500_NUM_IRQ_REGS;
1091 ab8500->irq_reg_offset = ab8500_irq_regoffset;
1092 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1093 }
1094 ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1095 GFP_KERNEL);
1096 if (!ab8500->mask)
1097 return -ENOMEM;
1098 ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1099 GFP_KERNEL);
1100 if (!ab8500->oldmask)
1101 return -ENOMEM;
1102
1103 /*
1104 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
1105 * 0x01 Swoff bit programming
1106 * 0x02 Thermal protection activation
1107 * 0x04 Vbat lower then BattOk falling threshold
1108 * 0x08 Watchdog expired
1109 * 0x10 Non presence of 32kHz clock
1110 * 0x20 Battery level lower than power on reset threshold
1111 * 0x40 Power on key 1 pressed longer than 10 seconds
1112 * 0x80 DB8500 thermal shutdown
1113 */
1114
1115 ret = get_register_interruptible(ab8500, AB8500_RTC,
1116 AB8500_SWITCH_OFF_STATUS, &value);
1117 if (ret < 0)
1118 return ret;
1119 dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
1120
1121 if (value) {
1122 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
1123 if (value & 1)
1124 pr_cont(" \"%s\"", switch_off_status[i]);
1125 value = value >> 1;
1126
1127 }
1128 pr_cont("\n");
1129 } else {
1130 pr_cont(" None\n");
1131 }
1132 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
1133 AB8500_TURN_ON_STATUS, &value);
1134 if (ret < 0)
1135 return ret;
1136 dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
1137
1138 if (value) {
1139 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
1140 if (value & 1)
1141 pr_cont("\"%s\" ", turn_on_status[i]);
1142 value = value >> 1;
1143 }
1144 pr_cont("\n");
1145 } else {
1146 pr_cont("None\n");
1147 }
1148
1149 if (is_ab9540(ab8500)) {
1150 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
1151 AB8500_CH_USBCH_STAT1_REG, &value);
1152 if (ret < 0)
1153 return ret;
1154 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
1155 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1156 AB8500_VBUS_DET);
1157 }
1158
1159 /* Clear and mask all interrupts */
1160 for (i = 0; i < ab8500->mask_size; i++) {
1161 /*
1162 * Interrupt register 12 doesn't exist prior to AB8500 version
1163 * 2.0
1164 */
1165 if (ab8500->irq_reg_offset[i] == 11 &&
1166 is_ab8500_1p1_or_earlier(ab8500))
1167 continue;
1168
1169 if (ab8500->irq_reg_offset[i] < 0)
1170 continue;
1171
1172 get_register_interruptible(ab8500, AB8500_INTERRUPT,
1173 AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
1174 &value);
1175 set_register_interruptible(ab8500, AB8500_INTERRUPT,
1176 AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
1177 }
1178
1179 ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
1180 if (ret)
1181 return ret;
1182
1183 for (i = 0; i < ab8500->mask_size; i++)
1184 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
1185
1186 ret = ab8500_irq_init(ab8500, np);
1187 if (ret)
1188 return ret;
1189
1190 ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
1191 ab8500_hierarchical_irq,
1192 IRQF_ONESHOT | IRQF_NO_SUSPEND,
1193 "ab8500", ab8500);
1194 if (ret)
1195 return ret;
1196
1197 if (is_ab9540(ab8500))
1198 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
1199 ARRAY_SIZE(ab9540_devs), NULL,
1200 0, ab8500->domain);
1201 else if (is_ab8540(ab8500)) {
1202 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
1203 ARRAY_SIZE(ab8540_devs), NULL,
1204 0, ab8500->domain);
1205 if (ret)
1206 return ret;
1207
1208 if (is_ab8540_1p2_or_earlier(ab8500))
1209 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
1210 ARRAY_SIZE(ab8540_cut1_devs), NULL,
1211 0, ab8500->domain);
1212 else /* ab8540 >= cut2 */
1213 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
1214 ARRAY_SIZE(ab8540_cut2_devs), NULL,
1215 0, ab8500->domain);
1216 } else if (is_ab8505(ab8500))
1217 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
1218 ARRAY_SIZE(ab8505_devs), NULL,
1219 0, ab8500->domain);
1220 else
1221 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
1222 ARRAY_SIZE(ab8500_devs), NULL,
1223 0, ab8500->domain);
1224 if (ret)
1225 return ret;
1226
1227 /* Add battery management devices */
1228 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
1229 ARRAY_SIZE(ab8500_bm_devs), NULL,
1230 0, ab8500->domain);
1231 if (ret)
1232 dev_err(ab8500->dev, "error adding bm devices\n");
1233
1234 if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1235 ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1236 ret = sysfs_create_group(&ab8500->dev->kobj,
1237 &ab9540_attr_group);
1238 else
1239 ret = sysfs_create_group(&ab8500->dev->kobj,
1240 &ab8500_attr_group);
1241
1242 if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1243 ab8500->chip_id >= AB8500_CUT2P0)
1244 ret = sysfs_create_group(&ab8500->dev->kobj,
1245 &ab8505_attr_group);
1246
1247 if (ret)
1248 dev_err(ab8500->dev, "error creating sysfs entries\n");
1249
1250 return ret;
1251}
1252
1253static const struct platform_device_id ab8500_id[] = {
1254 { "ab8500-core", AB8500_VERSION_AB8500 },
1255 { "ab8505-core", AB8500_VERSION_AB8505 },
1256 { "ab9540-i2c", AB8500_VERSION_AB9540 },
1257 { "ab8540-i2c", AB8500_VERSION_AB8540 },
1258 { }
1259};
1260
1261static struct platform_driver ab8500_core_driver = {
1262 .driver = {
1263 .name = "ab8500-core",
1264 .suppress_bind_attrs = true,
1265 },
1266 .probe = ab8500_probe,
1267 .id_table = ab8500_id,
1268};
1269
1270static int __init ab8500_core_init(void)
1271{
1272 return platform_driver_register(&ab8500_core_driver);
1273}
1274core_initcall(ab8500_core_init);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
6 * Author: Rabin Vincent <rabin.vincent@stericsson.com>
7 * Author: Mattias Wallin <mattias.wallin@stericsson.com>
8 */
9
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/init.h>
13#include <linux/irq.h>
14#include <linux/irqdomain.h>
15#include <linux/delay.h>
16#include <linux/interrupt.h>
17#include <linux/moduleparam.h>
18#include <linux/platform_device.h>
19#include <linux/mfd/core.h>
20#include <linux/mfd/abx500.h>
21#include <linux/mfd/abx500/ab8500.h>
22#include <linux/mfd/dbx500-prcmu.h>
23#include <linux/of.h>
24#include <linux/of_device.h>
25
26/*
27 * Interrupt register offsets
28 * Bank : 0x0E
29 */
30#define AB8500_IT_SOURCE1_REG 0x00
31#define AB8500_IT_SOURCE2_REG 0x01
32#define AB8500_IT_SOURCE3_REG 0x02
33#define AB8500_IT_SOURCE4_REG 0x03
34#define AB8500_IT_SOURCE5_REG 0x04
35#define AB8500_IT_SOURCE6_REG 0x05
36#define AB8500_IT_SOURCE7_REG 0x06
37#define AB8500_IT_SOURCE8_REG 0x07
38#define AB9540_IT_SOURCE13_REG 0x0C
39#define AB8500_IT_SOURCE19_REG 0x12
40#define AB8500_IT_SOURCE20_REG 0x13
41#define AB8500_IT_SOURCE21_REG 0x14
42#define AB8500_IT_SOURCE22_REG 0x15
43#define AB8500_IT_SOURCE23_REG 0x16
44#define AB8500_IT_SOURCE24_REG 0x17
45
46/*
47 * latch registers
48 */
49#define AB8500_IT_LATCH1_REG 0x20
50#define AB8500_IT_LATCH2_REG 0x21
51#define AB8500_IT_LATCH3_REG 0x22
52#define AB8500_IT_LATCH4_REG 0x23
53#define AB8500_IT_LATCH5_REG 0x24
54#define AB8500_IT_LATCH6_REG 0x25
55#define AB8500_IT_LATCH7_REG 0x26
56#define AB8500_IT_LATCH8_REG 0x27
57#define AB8500_IT_LATCH9_REG 0x28
58#define AB8500_IT_LATCH10_REG 0x29
59#define AB8500_IT_LATCH12_REG 0x2B
60#define AB9540_IT_LATCH13_REG 0x2C
61#define AB8500_IT_LATCH19_REG 0x32
62#define AB8500_IT_LATCH20_REG 0x33
63#define AB8500_IT_LATCH21_REG 0x34
64#define AB8500_IT_LATCH22_REG 0x35
65#define AB8500_IT_LATCH23_REG 0x36
66#define AB8500_IT_LATCH24_REG 0x37
67
68/*
69 * mask registers
70 */
71
72#define AB8500_IT_MASK1_REG 0x40
73#define AB8500_IT_MASK2_REG 0x41
74#define AB8500_IT_MASK3_REG 0x42
75#define AB8500_IT_MASK4_REG 0x43
76#define AB8500_IT_MASK5_REG 0x44
77#define AB8500_IT_MASK6_REG 0x45
78#define AB8500_IT_MASK7_REG 0x46
79#define AB8500_IT_MASK8_REG 0x47
80#define AB8500_IT_MASK9_REG 0x48
81#define AB8500_IT_MASK10_REG 0x49
82#define AB8500_IT_MASK11_REG 0x4A
83#define AB8500_IT_MASK12_REG 0x4B
84#define AB8500_IT_MASK13_REG 0x4C
85#define AB8500_IT_MASK14_REG 0x4D
86#define AB8500_IT_MASK15_REG 0x4E
87#define AB8500_IT_MASK16_REG 0x4F
88#define AB8500_IT_MASK17_REG 0x50
89#define AB8500_IT_MASK18_REG 0x51
90#define AB8500_IT_MASK19_REG 0x52
91#define AB8500_IT_MASK20_REG 0x53
92#define AB8500_IT_MASK21_REG 0x54
93#define AB8500_IT_MASK22_REG 0x55
94#define AB8500_IT_MASK23_REG 0x56
95#define AB8500_IT_MASK24_REG 0x57
96#define AB8500_IT_MASK25_REG 0x58
97
98/*
99 * latch hierarchy registers
100 */
101#define AB8500_IT_LATCHHIER1_REG 0x60
102#define AB8500_IT_LATCHHIER2_REG 0x61
103#define AB8500_IT_LATCHHIER3_REG 0x62
104#define AB8540_IT_LATCHHIER4_REG 0x63
105
106#define AB8500_IT_LATCHHIER_NUM 3
107#define AB8540_IT_LATCHHIER_NUM 4
108
109#define AB8500_REV_REG 0x80
110#define AB8500_IC_NAME_REG 0x82
111#define AB8500_SWITCH_OFF_STATUS 0x00
112
113#define AB8500_TURN_ON_STATUS 0x00
114#define AB8505_TURN_ON_STATUS_2 0x04
115
116#define AB8500_CH_USBCH_STAT1_REG 0x02
117#define VBUS_DET_DBNC100 0x02
118#define VBUS_DET_DBNC1 0x01
119
120static DEFINE_SPINLOCK(on_stat_lock);
121static u8 turn_on_stat_mask = 0xFF;
122static u8 turn_on_stat_set;
123
124#define AB9540_MODEM_CTRL2_REG 0x23
125#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2)
126
127/*
128 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
129 * numbers are indexed into this array with (num / 8). The interupts are
130 * defined in linux/mfd/ab8500.h
131 *
132 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
133 * offset 0.
134 */
135/* AB8500 support */
136static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
137 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
138};
139
140/* AB9540 / AB8505 support */
141static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
142 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
143};
144
145/* AB8540 support */
146static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
147 0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
148 23, 25, 26, 27, 28, 29, 30, 31,
149};
150
151static const char ab8500_version_str[][7] = {
152 [AB8500_VERSION_AB8500] = "AB8500",
153 [AB8500_VERSION_AB8505] = "AB8505",
154 [AB8500_VERSION_AB9540] = "AB9540",
155 [AB8500_VERSION_AB8540] = "AB8540",
156};
157
158static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
159{
160 int ret;
161
162 ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
163 if (ret < 0)
164 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
165 return ret;
166}
167
168static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
169 u8 data)
170{
171 int ret;
172
173 ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
174 &mask, 1);
175 if (ret < 0)
176 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
177 return ret;
178}
179
180static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
181{
182 int ret;
183 u8 data;
184
185 ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
186 if (ret < 0) {
187 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
188 return ret;
189 }
190 return (int)data;
191}
192
193static int ab8500_get_chip_id(struct device *dev)
194{
195 struct ab8500 *ab8500;
196
197 if (!dev)
198 return -EINVAL;
199 ab8500 = dev_get_drvdata(dev->parent);
200 return ab8500 ? (int)ab8500->chip_id : -EINVAL;
201}
202
203static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
204 u8 reg, u8 data)
205{
206 int ret;
207 /*
208 * Put the u8 bank and u8 register together into a an u16.
209 * The bank on higher 8 bits and register in lower 8 bits.
210 */
211 u16 addr = ((u16)bank) << 8 | reg;
212
213 dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
214
215 mutex_lock(&ab8500->lock);
216
217 ret = ab8500->write(ab8500, addr, data);
218 if (ret < 0)
219 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
220 addr, ret);
221 mutex_unlock(&ab8500->lock);
222
223 return ret;
224}
225
226static int ab8500_set_register(struct device *dev, u8 bank,
227 u8 reg, u8 value)
228{
229 int ret;
230 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
231
232 atomic_inc(&ab8500->transfer_ongoing);
233 ret = set_register_interruptible(ab8500, bank, reg, value);
234 atomic_dec(&ab8500->transfer_ongoing);
235 return ret;
236}
237
238static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
239 u8 reg, u8 *value)
240{
241 int ret;
242 u16 addr = ((u16)bank) << 8 | reg;
243
244 mutex_lock(&ab8500->lock);
245
246 ret = ab8500->read(ab8500, addr);
247 if (ret < 0)
248 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
249 addr, ret);
250 else
251 *value = ret;
252
253 mutex_unlock(&ab8500->lock);
254 dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
255
256 return (ret < 0) ? ret : 0;
257}
258
259static int ab8500_get_register(struct device *dev, u8 bank,
260 u8 reg, u8 *value)
261{
262 int ret;
263 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
264
265 atomic_inc(&ab8500->transfer_ongoing);
266 ret = get_register_interruptible(ab8500, bank, reg, value);
267 atomic_dec(&ab8500->transfer_ongoing);
268 return ret;
269}
270
271static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
272 u8 reg, u8 bitmask, u8 bitvalues)
273{
274 int ret;
275 u16 addr = ((u16)bank) << 8 | reg;
276
277 mutex_lock(&ab8500->lock);
278
279 if (ab8500->write_masked == NULL) {
280 u8 data;
281
282 ret = ab8500->read(ab8500, addr);
283 if (ret < 0) {
284 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
285 addr, ret);
286 goto out;
287 }
288
289 data = (u8)ret;
290 data = (~bitmask & data) | (bitmask & bitvalues);
291
292 ret = ab8500->write(ab8500, addr, data);
293 if (ret < 0)
294 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
295 addr, ret);
296
297 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
298 data);
299 goto out;
300 }
301 ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
302 if (ret < 0)
303 dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
304 ret);
305out:
306 mutex_unlock(&ab8500->lock);
307 return ret;
308}
309
310static int ab8500_mask_and_set_register(struct device *dev,
311 u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
312{
313 int ret;
314 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
315
316 atomic_inc(&ab8500->transfer_ongoing);
317 ret = mask_and_set_register_interruptible(ab8500, bank, reg,
318 bitmask, bitvalues);
319 atomic_dec(&ab8500->transfer_ongoing);
320 return ret;
321}
322
323static struct abx500_ops ab8500_ops = {
324 .get_chip_id = ab8500_get_chip_id,
325 .get_register = ab8500_get_register,
326 .set_register = ab8500_set_register,
327 .get_register_page = NULL,
328 .set_register_page = NULL,
329 .mask_and_set_register = ab8500_mask_and_set_register,
330 .event_registers_startup_state_get = NULL,
331 .startup_irq_enabled = NULL,
332 .dump_all_banks = ab8500_dump_all_banks,
333};
334
335static void ab8500_irq_lock(struct irq_data *data)
336{
337 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
338
339 mutex_lock(&ab8500->irq_lock);
340 atomic_inc(&ab8500->transfer_ongoing);
341}
342
343static void ab8500_irq_sync_unlock(struct irq_data *data)
344{
345 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
346 int i;
347
348 for (i = 0; i < ab8500->mask_size; i++) {
349 u8 old = ab8500->oldmask[i];
350 u8 new = ab8500->mask[i];
351 int reg;
352
353 if (new == old)
354 continue;
355
356 /*
357 * Interrupt register 12 doesn't exist prior to AB8500 version
358 * 2.0
359 */
360 if (ab8500->irq_reg_offset[i] == 11 &&
361 is_ab8500_1p1_or_earlier(ab8500))
362 continue;
363
364 if (ab8500->irq_reg_offset[i] < 0)
365 continue;
366
367 ab8500->oldmask[i] = new;
368
369 reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
370 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
371 }
372 atomic_dec(&ab8500->transfer_ongoing);
373 mutex_unlock(&ab8500->irq_lock);
374}
375
376static void ab8500_irq_mask(struct irq_data *data)
377{
378 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
379 int offset = data->hwirq;
380 int index = offset / 8;
381 int mask = 1 << (offset % 8);
382
383 ab8500->mask[index] |= mask;
384
385 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
386 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
387 ab8500->mask[index + 2] |= mask;
388 if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
389 ab8500->mask[index + 1] |= mask;
390 if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
391 /* Here the falling IRQ is one bit lower */
392 ab8500->mask[index] |= (mask << 1);
393}
394
395static void ab8500_irq_unmask(struct irq_data *data)
396{
397 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
398 unsigned int type = irqd_get_trigger_type(data);
399 int offset = data->hwirq;
400 int index = offset / 8;
401 int mask = 1 << (offset % 8);
402
403 if (type & IRQ_TYPE_EDGE_RISING)
404 ab8500->mask[index] &= ~mask;
405
406 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
407 if (type & IRQ_TYPE_EDGE_FALLING) {
408 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
409 ab8500->mask[index + 2] &= ~mask;
410 else if (offset >= AB9540_INT_GPIO50R &&
411 offset <= AB9540_INT_GPIO54R)
412 ab8500->mask[index + 1] &= ~mask;
413 else if (offset == AB8540_INT_GPIO43R ||
414 offset == AB8540_INT_GPIO44R)
415 /* Here the falling IRQ is one bit lower */
416 ab8500->mask[index] &= ~(mask << 1);
417 else
418 ab8500->mask[index] &= ~mask;
419 } else {
420 /* Satisfies the case where type is not set. */
421 ab8500->mask[index] &= ~mask;
422 }
423}
424
425static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
426{
427 return 0;
428}
429
430static struct irq_chip ab8500_irq_chip = {
431 .name = "ab8500",
432 .irq_bus_lock = ab8500_irq_lock,
433 .irq_bus_sync_unlock = ab8500_irq_sync_unlock,
434 .irq_mask = ab8500_irq_mask,
435 .irq_disable = ab8500_irq_mask,
436 .irq_unmask = ab8500_irq_unmask,
437 .irq_set_type = ab8500_irq_set_type,
438};
439
440static void update_latch_offset(u8 *offset, int i)
441{
442 /* Fix inconsistent ITFromLatch25 bit mapping... */
443 if (unlikely(*offset == 17))
444 *offset = 24;
445 /* Fix inconsistent ab8540 bit mapping... */
446 if (unlikely(*offset == 16))
447 *offset = 25;
448 if ((i == 3) && (*offset >= 24))
449 *offset += 2;
450}
451
452static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
453 int latch_offset, u8 latch_val)
454{
455 int int_bit, line, i;
456
457 for (i = 0; i < ab8500->mask_size; i++)
458 if (ab8500->irq_reg_offset[i] == latch_offset)
459 break;
460
461 if (i >= ab8500->mask_size) {
462 dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
463 latch_offset);
464 return -ENXIO;
465 }
466
467 /* ignore masked out interrupts */
468 latch_val &= ~ab8500->mask[i];
469
470 while (latch_val) {
471 int_bit = __ffs(latch_val);
472 line = (i << 3) + int_bit;
473 latch_val &= ~(1 << int_bit);
474
475 /*
476 * This handles the falling edge hwirqs from the GPIO
477 * lines. Route them back to the line registered for the
478 * rising IRQ, as this is merely a flag for the same IRQ
479 * in linux terms.
480 */
481 if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
482 line -= 16;
483 if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
484 line -= 8;
485 if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
486 line += 1;
487
488 handle_nested_irq(irq_find_mapping(ab8500->domain, line));
489 }
490
491 return 0;
492}
493
494static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
495 int hier_offset, u8 hier_val)
496{
497 int latch_bit, status;
498 u8 latch_offset, latch_val;
499
500 do {
501 latch_bit = __ffs(hier_val);
502 latch_offset = (hier_offset << 3) + latch_bit;
503
504 update_latch_offset(&latch_offset, hier_offset);
505
506 status = get_register_interruptible(ab8500,
507 AB8500_INTERRUPT,
508 AB8500_IT_LATCH1_REG + latch_offset,
509 &latch_val);
510 if (status < 0 || latch_val == 0)
511 goto discard;
512
513 status = ab8500_handle_hierarchical_line(ab8500,
514 latch_offset, latch_val);
515 if (status < 0)
516 return status;
517discard:
518 hier_val &= ~(1 << latch_bit);
519 } while (hier_val);
520
521 return 0;
522}
523
524static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
525{
526 struct ab8500 *ab8500 = dev;
527 u8 i;
528
529 dev_vdbg(ab8500->dev, "interrupt\n");
530
531 /* Hierarchical interrupt version */
532 for (i = 0; i < (ab8500->it_latchhier_num); i++) {
533 int status;
534 u8 hier_val;
535
536 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
537 AB8500_IT_LATCHHIER1_REG + i, &hier_val);
538 if (status < 0 || hier_val == 0)
539 continue;
540
541 status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
542 if (status < 0)
543 break;
544 }
545 return IRQ_HANDLED;
546}
547
548static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
549 irq_hw_number_t hwirq)
550{
551 struct ab8500 *ab8500 = d->host_data;
552
553 if (!ab8500)
554 return -EINVAL;
555
556 irq_set_chip_data(virq, ab8500);
557 irq_set_chip_and_handler(virq, &ab8500_irq_chip,
558 handle_simple_irq);
559 irq_set_nested_thread(virq, 1);
560 irq_set_noprobe(virq);
561
562 return 0;
563}
564
565static const struct irq_domain_ops ab8500_irq_ops = {
566 .map = ab8500_irq_map,
567 .xlate = irq_domain_xlate_twocell,
568};
569
570static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
571{
572 int num_irqs;
573
574 if (is_ab8540(ab8500))
575 num_irqs = AB8540_NR_IRQS;
576 else if (is_ab9540(ab8500))
577 num_irqs = AB9540_NR_IRQS;
578 else if (is_ab8505(ab8500))
579 num_irqs = AB8505_NR_IRQS;
580 else
581 num_irqs = AB8500_NR_IRQS;
582
583 /* If ->irq_base is zero this will give a linear mapping */
584 ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
585 num_irqs, 0,
586 &ab8500_irq_ops, ab8500);
587
588 if (!ab8500->domain) {
589 dev_err(ab8500->dev, "Failed to create irqdomain\n");
590 return -ENODEV;
591 }
592
593 return 0;
594}
595
596int ab8500_suspend(struct ab8500 *ab8500)
597{
598 if (atomic_read(&ab8500->transfer_ongoing))
599 return -EINVAL;
600
601 return 0;
602}
603
604static const struct mfd_cell ab8500_bm_devs[] = {
605 MFD_CELL_OF("ab8500-charger", NULL, NULL, 0, 0,
606 "stericsson,ab8500-charger"),
607 MFD_CELL_OF("ab8500-btemp", NULL, NULL, 0, 0,
608 "stericsson,ab8500-btemp"),
609 MFD_CELL_OF("ab8500-fg", NULL, NULL, 0, 0,
610 "stericsson,ab8500-fg"),
611 MFD_CELL_OF("ab8500-chargalg", NULL, NULL, 0, 0,
612 "stericsson,ab8500-chargalg"),
613};
614
615static const struct mfd_cell ab8500_devs[] = {
616 MFD_CELL_OF("ab8500-sysctrl",
617 NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"),
618 MFD_CELL_OF("ab8500-ext-regulator",
619 NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"),
620 MFD_CELL_OF("ab8500-regulator",
621 NULL, NULL, 0, 0, "stericsson,ab8500-regulator"),
622 MFD_CELL_OF("ab8500-clk",
623 NULL, NULL, 0, 0, "stericsson,ab8500-clk"),
624 MFD_CELL_OF("ab8500-gpadc",
625 NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"),
626 MFD_CELL_OF("ab8500-rtc",
627 NULL, NULL, 0, 0, "stericsson,ab8500-rtc"),
628 MFD_CELL_OF("ab8500-acc-det",
629 NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"),
630 MFD_CELL_OF("ab8500-poweron-key",
631 NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"),
632 MFD_CELL_OF("ab8500-pwm",
633 NULL, NULL, 0, 1, "stericsson,ab8500-pwm"),
634 MFD_CELL_OF("ab8500-pwm",
635 NULL, NULL, 0, 2, "stericsson,ab8500-pwm"),
636 MFD_CELL_OF("ab8500-pwm",
637 NULL, NULL, 0, 3, "stericsson,ab8500-pwm"),
638 MFD_CELL_OF("ab8500-denc",
639 NULL, NULL, 0, 0, "stericsson,ab8500-denc"),
640 MFD_CELL_OF("pinctrl-ab8500",
641 NULL, NULL, 0, 0, "stericsson,ab8500-gpio"),
642 MFD_CELL_OF("abx500-temp",
643 NULL, NULL, 0, 0, "stericsson,abx500-temp"),
644 MFD_CELL_OF("ab8500-usb",
645 NULL, NULL, 0, 0, "stericsson,ab8500-usb"),
646 MFD_CELL_OF("ab8500-codec",
647 NULL, NULL, 0, 0, "stericsson,ab8500-codec"),
648};
649
650static const struct mfd_cell ab9540_devs[] = {
651 {
652 .name = "ab8500-sysctrl",
653 },
654 {
655 .name = "ab8500-ext-regulator",
656 },
657 {
658 .name = "ab8500-regulator",
659 },
660 {
661 .name = "abx500-clk",
662 .of_compatible = "stericsson,abx500-clk",
663 },
664 {
665 .name = "ab8500-gpadc",
666 .of_compatible = "stericsson,ab8500-gpadc",
667 },
668 {
669 .name = "ab8500-rtc",
670 },
671 {
672 .name = "ab8500-acc-det",
673 },
674 {
675 .name = "ab8500-poweron-key",
676 },
677 {
678 .name = "ab8500-pwm",
679 .id = 1,
680 },
681 {
682 .name = "abx500-temp",
683 },
684 {
685 .name = "pinctrl-ab9540",
686 .of_compatible = "stericsson,ab9540-gpio",
687 },
688 {
689 .name = "ab9540-usb",
690 },
691 {
692 .name = "ab9540-codec",
693 },
694 {
695 .name = "ab-iddet",
696 },
697};
698
699/* Device list for ab8505 */
700static const struct mfd_cell ab8505_devs[] = {
701 {
702 .name = "ab8500-sysctrl",
703 .of_compatible = "stericsson,ab8500-sysctrl",
704 },
705 {
706 .name = "ab8500-regulator",
707 .of_compatible = "stericsson,ab8505-regulator",
708 },
709 {
710 .name = "abx500-clk",
711 .of_compatible = "stericsson,ab8500-clk",
712 },
713 {
714 .name = "ab8500-gpadc",
715 .of_compatible = "stericsson,ab8500-gpadc",
716 },
717 {
718 .name = "ab8500-rtc",
719 .of_compatible = "stericsson,ab8500-rtc",
720 },
721 {
722 .name = "ab8500-acc-det",
723 .of_compatible = "stericsson,ab8500-acc-det",
724 },
725 {
726 .name = "ab8500-poweron-key",
727 .of_compatible = "stericsson,ab8500-poweron-key",
728 },
729 {
730 .name = "ab8500-pwm",
731 .of_compatible = "stericsson,ab8500-pwm",
732 .id = 1,
733 },
734 {
735 .name = "pinctrl-ab8505",
736 .of_compatible = "stericsson,ab8505-gpio",
737 },
738 {
739 .name = "ab8500-usb",
740 .of_compatible = "stericsson,ab8500-usb",
741 },
742 {
743 .name = "ab8500-codec",
744 .of_compatible = "stericsson,ab8500-codec",
745 },
746 {
747 .name = "ab-iddet",
748 },
749};
750
751static const struct mfd_cell ab8540_devs[] = {
752 {
753 .name = "ab8500-sysctrl",
754 },
755 {
756 .name = "ab8500-ext-regulator",
757 },
758 {
759 .name = "ab8500-regulator",
760 },
761 {
762 .name = "abx500-clk",
763 .of_compatible = "stericsson,abx500-clk",
764 },
765 {
766 .name = "ab8500-gpadc",
767 .of_compatible = "stericsson,ab8500-gpadc",
768 },
769 {
770 .name = "ab8500-acc-det",
771 },
772 {
773 .name = "ab8500-poweron-key",
774 },
775 {
776 .name = "ab8500-pwm",
777 .id = 1,
778 },
779 {
780 .name = "abx500-temp",
781 },
782 {
783 .name = "pinctrl-ab8540",
784 },
785 {
786 .name = "ab8540-usb",
787 },
788 {
789 .name = "ab8540-codec",
790 },
791 {
792 .name = "ab-iddet",
793 },
794};
795
796static const struct mfd_cell ab8540_cut1_devs[] = {
797 {
798 .name = "ab8500-rtc",
799 .of_compatible = "stericsson,ab8500-rtc",
800 },
801};
802
803static const struct mfd_cell ab8540_cut2_devs[] = {
804 {
805 .name = "ab8540-rtc",
806 .of_compatible = "stericsson,ab8540-rtc",
807 },
808};
809
810static ssize_t chip_id_show(struct device *dev,
811 struct device_attribute *attr, char *buf)
812{
813 struct ab8500 *ab8500;
814
815 ab8500 = dev_get_drvdata(dev);
816
817 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
818}
819
820/*
821 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
822 * 0x01 Swoff bit programming
823 * 0x02 Thermal protection activation
824 * 0x04 Vbat lower then BattOk falling threshold
825 * 0x08 Watchdog expired
826 * 0x10 Non presence of 32kHz clock
827 * 0x20 Battery level lower than power on reset threshold
828 * 0x40 Power on key 1 pressed longer than 10 seconds
829 * 0x80 DB8500 thermal shutdown
830 */
831static ssize_t switch_off_status_show(struct device *dev,
832 struct device_attribute *attr, char *buf)
833{
834 int ret;
835 u8 value;
836 struct ab8500 *ab8500;
837
838 ab8500 = dev_get_drvdata(dev);
839 ret = get_register_interruptible(ab8500, AB8500_RTC,
840 AB8500_SWITCH_OFF_STATUS, &value);
841 if (ret < 0)
842 return ret;
843 return sprintf(buf, "%#x\n", value);
844}
845
846/* use mask and set to override the register turn_on_stat value */
847void ab8500_override_turn_on_stat(u8 mask, u8 set)
848{
849 spin_lock(&on_stat_lock);
850 turn_on_stat_mask = mask;
851 turn_on_stat_set = set;
852 spin_unlock(&on_stat_lock);
853}
854
855/*
856 * ab8500 has turned on due to (TURN_ON_STATUS):
857 * 0x01 PORnVbat
858 * 0x02 PonKey1dbF
859 * 0x04 PonKey2dbF
860 * 0x08 RTCAlarm
861 * 0x10 MainChDet
862 * 0x20 VbusDet
863 * 0x40 UsbIDDetect
864 * 0x80 Reserved
865 */
866static ssize_t turn_on_status_show(struct device *dev,
867 struct device_attribute *attr, char *buf)
868{
869 int ret;
870 u8 value;
871 struct ab8500 *ab8500;
872
873 ab8500 = dev_get_drvdata(dev);
874 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
875 AB8500_TURN_ON_STATUS, &value);
876 if (ret < 0)
877 return ret;
878
879 /*
880 * In L9540, turn_on_status register is not updated correctly if
881 * the device is rebooted with AC/USB charger connected. Due to
882 * this, the device boots android instead of entering into charge
883 * only mode. Read the AC/USB status register to detect the charger
884 * presence and update the turn on status manually.
885 */
886 if (is_ab9540(ab8500)) {
887 spin_lock(&on_stat_lock);
888 value = (value & turn_on_stat_mask) | turn_on_stat_set;
889 spin_unlock(&on_stat_lock);
890 }
891
892 return sprintf(buf, "%#x\n", value);
893}
894
895static ssize_t turn_on_status_2_show(struct device *dev,
896 struct device_attribute *attr, char *buf)
897{
898 int ret;
899 u8 value;
900 struct ab8500 *ab8500;
901
902 ab8500 = dev_get_drvdata(dev);
903 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
904 AB8505_TURN_ON_STATUS_2, &value);
905 if (ret < 0)
906 return ret;
907 return sprintf(buf, "%#x\n", (value & 0x1));
908}
909
910static ssize_t dbbrstn_show(struct device *dev,
911 struct device_attribute *attr, char *buf)
912{
913 struct ab8500 *ab8500;
914 int ret;
915 u8 value;
916
917 ab8500 = dev_get_drvdata(dev);
918
919 ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
920 AB9540_MODEM_CTRL2_REG, &value);
921 if (ret < 0)
922 return ret;
923
924 return sprintf(buf, "%d\n",
925 (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
926}
927
928static ssize_t dbbrstn_store(struct device *dev,
929 struct device_attribute *attr, const char *buf, size_t count)
930{
931 struct ab8500 *ab8500;
932 int ret = count;
933 int err;
934 u8 bitvalues;
935
936 ab8500 = dev_get_drvdata(dev);
937
938 if (count > 0) {
939 switch (buf[0]) {
940 case '0':
941 bitvalues = 0;
942 break;
943 case '1':
944 bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
945 break;
946 default:
947 goto exit;
948 }
949
950 err = mask_and_set_register_interruptible(ab8500,
951 AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
952 AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
953 if (err)
954 dev_info(ab8500->dev,
955 "Failed to set DBBRSTN %c, err %#x\n",
956 buf[0], err);
957 }
958
959exit:
960 return ret;
961}
962
963static DEVICE_ATTR_RO(chip_id);
964static DEVICE_ATTR_RO(switch_off_status);
965static DEVICE_ATTR_RO(turn_on_status);
966static DEVICE_ATTR_RO(turn_on_status_2);
967static DEVICE_ATTR_RW(dbbrstn);
968
969static struct attribute *ab8500_sysfs_entries[] = {
970 &dev_attr_chip_id.attr,
971 &dev_attr_switch_off_status.attr,
972 &dev_attr_turn_on_status.attr,
973 NULL,
974};
975
976static struct attribute *ab8505_sysfs_entries[] = {
977 &dev_attr_turn_on_status_2.attr,
978 NULL,
979};
980
981static struct attribute *ab9540_sysfs_entries[] = {
982 &dev_attr_chip_id.attr,
983 &dev_attr_switch_off_status.attr,
984 &dev_attr_turn_on_status.attr,
985 &dev_attr_dbbrstn.attr,
986 NULL,
987};
988
989static const struct attribute_group ab8500_attr_group = {
990 .attrs = ab8500_sysfs_entries,
991};
992
993static const struct attribute_group ab8505_attr_group = {
994 .attrs = ab8505_sysfs_entries,
995};
996
997static const struct attribute_group ab9540_attr_group = {
998 .attrs = ab9540_sysfs_entries,
999};
1000
1001static int ab8500_probe(struct platform_device *pdev)
1002{
1003 static const char * const switch_off_status[] = {
1004 "Swoff bit programming",
1005 "Thermal protection activation",
1006 "Vbat lower then BattOk falling threshold",
1007 "Watchdog expired",
1008 "Non presence of 32kHz clock",
1009 "Battery level lower than power on reset threshold",
1010 "Power on key 1 pressed longer than 10 seconds",
1011 "DB8500 thermal shutdown"};
1012 static const char * const turn_on_status[] = {
1013 "Battery rising (Vbat)",
1014 "Power On Key 1 dbF",
1015 "Power On Key 2 dbF",
1016 "RTC Alarm",
1017 "Main Charger Detect",
1018 "Vbus Detect (USB)",
1019 "USB ID Detect",
1020 "UART Factory Mode Detect"};
1021 const struct platform_device_id *platid = platform_get_device_id(pdev);
1022 enum ab8500_version version = AB8500_VERSION_UNDEFINED;
1023 struct device_node *np = pdev->dev.of_node;
1024 struct ab8500 *ab8500;
1025 int ret;
1026 int i;
1027 int irq;
1028 u8 value;
1029
1030 ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
1031 if (!ab8500)
1032 return -ENOMEM;
1033
1034 ab8500->dev = &pdev->dev;
1035
1036 irq = platform_get_irq(pdev, 0);
1037 if (irq < 0)
1038 return irq;
1039
1040 ab8500->irq = irq;
1041
1042 ab8500->read = ab8500_prcmu_read;
1043 ab8500->write = ab8500_prcmu_write;
1044 ab8500->write_masked = ab8500_prcmu_write_masked;
1045
1046 mutex_init(&ab8500->lock);
1047 mutex_init(&ab8500->irq_lock);
1048 atomic_set(&ab8500->transfer_ongoing, 0);
1049
1050 platform_set_drvdata(pdev, ab8500);
1051
1052 if (platid)
1053 version = platid->driver_data;
1054
1055 if (version != AB8500_VERSION_UNDEFINED)
1056 ab8500->version = version;
1057 else {
1058 ret = get_register_interruptible(ab8500, AB8500_MISC,
1059 AB8500_IC_NAME_REG, &value);
1060 if (ret < 0) {
1061 dev_err(&pdev->dev, "could not probe HW\n");
1062 return ret;
1063 }
1064
1065 ab8500->version = value;
1066 }
1067
1068 ret = get_register_interruptible(ab8500, AB8500_MISC,
1069 AB8500_REV_REG, &value);
1070 if (ret < 0)
1071 return ret;
1072
1073 ab8500->chip_id = value;
1074
1075 dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
1076 ab8500_version_str[ab8500->version],
1077 ab8500->chip_id >> 4,
1078 ab8500->chip_id & 0x0F);
1079
1080 /* Configure AB8540 */
1081 if (is_ab8540(ab8500)) {
1082 ab8500->mask_size = AB8540_NUM_IRQ_REGS;
1083 ab8500->irq_reg_offset = ab8540_irq_regoffset;
1084 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
1085 } /* Configure AB8500 or AB9540 IRQ */
1086 else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
1087 ab8500->mask_size = AB9540_NUM_IRQ_REGS;
1088 ab8500->irq_reg_offset = ab9540_irq_regoffset;
1089 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1090 } else {
1091 ab8500->mask_size = AB8500_NUM_IRQ_REGS;
1092 ab8500->irq_reg_offset = ab8500_irq_regoffset;
1093 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1094 }
1095 ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1096 GFP_KERNEL);
1097 if (!ab8500->mask)
1098 return -ENOMEM;
1099 ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1100 GFP_KERNEL);
1101 if (!ab8500->oldmask)
1102 return -ENOMEM;
1103
1104 /*
1105 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
1106 * 0x01 Swoff bit programming
1107 * 0x02 Thermal protection activation
1108 * 0x04 Vbat lower then BattOk falling threshold
1109 * 0x08 Watchdog expired
1110 * 0x10 Non presence of 32kHz clock
1111 * 0x20 Battery level lower than power on reset threshold
1112 * 0x40 Power on key 1 pressed longer than 10 seconds
1113 * 0x80 DB8500 thermal shutdown
1114 */
1115
1116 ret = get_register_interruptible(ab8500, AB8500_RTC,
1117 AB8500_SWITCH_OFF_STATUS, &value);
1118 if (ret < 0)
1119 return ret;
1120 dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
1121
1122 if (value) {
1123 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
1124 if (value & 1)
1125 pr_cont(" \"%s\"", switch_off_status[i]);
1126 value = value >> 1;
1127
1128 }
1129 pr_cont("\n");
1130 } else {
1131 pr_cont(" None\n");
1132 }
1133 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
1134 AB8500_TURN_ON_STATUS, &value);
1135 if (ret < 0)
1136 return ret;
1137 dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
1138
1139 if (value) {
1140 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
1141 if (value & 1)
1142 pr_cont("\"%s\" ", turn_on_status[i]);
1143 value = value >> 1;
1144 }
1145 pr_cont("\n");
1146 } else {
1147 pr_cont("None\n");
1148 }
1149
1150 if (is_ab9540(ab8500)) {
1151 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
1152 AB8500_CH_USBCH_STAT1_REG, &value);
1153 if (ret < 0)
1154 return ret;
1155 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
1156 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1157 AB8500_VBUS_DET);
1158 }
1159
1160 /* Clear and mask all interrupts */
1161 for (i = 0; i < ab8500->mask_size; i++) {
1162 /*
1163 * Interrupt register 12 doesn't exist prior to AB8500 version
1164 * 2.0
1165 */
1166 if (ab8500->irq_reg_offset[i] == 11 &&
1167 is_ab8500_1p1_or_earlier(ab8500))
1168 continue;
1169
1170 if (ab8500->irq_reg_offset[i] < 0)
1171 continue;
1172
1173 get_register_interruptible(ab8500, AB8500_INTERRUPT,
1174 AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
1175 &value);
1176 set_register_interruptible(ab8500, AB8500_INTERRUPT,
1177 AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
1178 }
1179
1180 ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
1181 if (ret)
1182 return ret;
1183
1184 for (i = 0; i < ab8500->mask_size; i++)
1185 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
1186
1187 ret = ab8500_irq_init(ab8500, np);
1188 if (ret)
1189 return ret;
1190
1191 ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
1192 ab8500_hierarchical_irq,
1193 IRQF_ONESHOT | IRQF_NO_SUSPEND,
1194 "ab8500", ab8500);
1195 if (ret)
1196 return ret;
1197
1198 if (is_ab9540(ab8500))
1199 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
1200 ARRAY_SIZE(ab9540_devs), NULL,
1201 0, ab8500->domain);
1202 else if (is_ab8540(ab8500)) {
1203 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
1204 ARRAY_SIZE(ab8540_devs), NULL,
1205 0, ab8500->domain);
1206 if (ret)
1207 return ret;
1208
1209 if (is_ab8540_1p2_or_earlier(ab8500))
1210 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
1211 ARRAY_SIZE(ab8540_cut1_devs), NULL,
1212 0, ab8500->domain);
1213 else /* ab8540 >= cut2 */
1214 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
1215 ARRAY_SIZE(ab8540_cut2_devs), NULL,
1216 0, ab8500->domain);
1217 } else if (is_ab8505(ab8500))
1218 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
1219 ARRAY_SIZE(ab8505_devs), NULL,
1220 0, ab8500->domain);
1221 else
1222 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
1223 ARRAY_SIZE(ab8500_devs), NULL,
1224 0, ab8500->domain);
1225 if (ret)
1226 return ret;
1227
1228 /* Add battery management devices */
1229 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
1230 ARRAY_SIZE(ab8500_bm_devs), NULL,
1231 0, ab8500->domain);
1232 if (ret)
1233 dev_err(ab8500->dev, "error adding bm devices\n");
1234
1235 if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1236 ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1237 ret = sysfs_create_group(&ab8500->dev->kobj,
1238 &ab9540_attr_group);
1239 else
1240 ret = sysfs_create_group(&ab8500->dev->kobj,
1241 &ab8500_attr_group);
1242
1243 if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1244 ab8500->chip_id >= AB8500_CUT2P0)
1245 ret = sysfs_create_group(&ab8500->dev->kobj,
1246 &ab8505_attr_group);
1247
1248 if (ret)
1249 dev_err(ab8500->dev, "error creating sysfs entries\n");
1250
1251 return ret;
1252}
1253
1254static const struct platform_device_id ab8500_id[] = {
1255 { "ab8500-core", AB8500_VERSION_AB8500 },
1256 { "ab8505-core", AB8500_VERSION_AB8505 },
1257 { "ab9540-i2c", AB8500_VERSION_AB9540 },
1258 { "ab8540-i2c", AB8500_VERSION_AB8540 },
1259 { }
1260};
1261
1262static struct platform_driver ab8500_core_driver = {
1263 .driver = {
1264 .name = "ab8500-core",
1265 .suppress_bind_attrs = true,
1266 },
1267 .probe = ab8500_probe,
1268 .id_table = ab8500_id,
1269};
1270
1271static int __init ab8500_core_init(void)
1272{
1273 return platform_driver_register(&ab8500_core_driver);
1274}
1275core_initcall(ab8500_core_init);