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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/abx500/ab8500-bm.h>
23#include <linux/mfd/dbx500-prcmu.h>
24#include <linux/regulator/ab8500.h>
25#include <linux/of.h>
26#include <linux/of_device.h>
27
28/*
29 * Interrupt register offsets
30 * Bank : 0x0E
31 */
32#define AB8500_IT_SOURCE1_REG 0x00
33#define AB8500_IT_SOURCE2_REG 0x01
34#define AB8500_IT_SOURCE3_REG 0x02
35#define AB8500_IT_SOURCE4_REG 0x03
36#define AB8500_IT_SOURCE5_REG 0x04
37#define AB8500_IT_SOURCE6_REG 0x05
38#define AB8500_IT_SOURCE7_REG 0x06
39#define AB8500_IT_SOURCE8_REG 0x07
40#define AB9540_IT_SOURCE13_REG 0x0C
41#define AB8500_IT_SOURCE19_REG 0x12
42#define AB8500_IT_SOURCE20_REG 0x13
43#define AB8500_IT_SOURCE21_REG 0x14
44#define AB8500_IT_SOURCE22_REG 0x15
45#define AB8500_IT_SOURCE23_REG 0x16
46#define AB8500_IT_SOURCE24_REG 0x17
47
48/*
49 * latch registers
50 */
51#define AB8500_IT_LATCH1_REG 0x20
52#define AB8500_IT_LATCH2_REG 0x21
53#define AB8500_IT_LATCH3_REG 0x22
54#define AB8500_IT_LATCH4_REG 0x23
55#define AB8500_IT_LATCH5_REG 0x24
56#define AB8500_IT_LATCH6_REG 0x25
57#define AB8500_IT_LATCH7_REG 0x26
58#define AB8500_IT_LATCH8_REG 0x27
59#define AB8500_IT_LATCH9_REG 0x28
60#define AB8500_IT_LATCH10_REG 0x29
61#define AB8500_IT_LATCH12_REG 0x2B
62#define AB9540_IT_LATCH13_REG 0x2C
63#define AB8500_IT_LATCH19_REG 0x32
64#define AB8500_IT_LATCH20_REG 0x33
65#define AB8500_IT_LATCH21_REG 0x34
66#define AB8500_IT_LATCH22_REG 0x35
67#define AB8500_IT_LATCH23_REG 0x36
68#define AB8500_IT_LATCH24_REG 0x37
69
70/*
71 * mask registers
72 */
73
74#define AB8500_IT_MASK1_REG 0x40
75#define AB8500_IT_MASK2_REG 0x41
76#define AB8500_IT_MASK3_REG 0x42
77#define AB8500_IT_MASK4_REG 0x43
78#define AB8500_IT_MASK5_REG 0x44
79#define AB8500_IT_MASK6_REG 0x45
80#define AB8500_IT_MASK7_REG 0x46
81#define AB8500_IT_MASK8_REG 0x47
82#define AB8500_IT_MASK9_REG 0x48
83#define AB8500_IT_MASK10_REG 0x49
84#define AB8500_IT_MASK11_REG 0x4A
85#define AB8500_IT_MASK12_REG 0x4B
86#define AB8500_IT_MASK13_REG 0x4C
87#define AB8500_IT_MASK14_REG 0x4D
88#define AB8500_IT_MASK15_REG 0x4E
89#define AB8500_IT_MASK16_REG 0x4F
90#define AB8500_IT_MASK17_REG 0x50
91#define AB8500_IT_MASK18_REG 0x51
92#define AB8500_IT_MASK19_REG 0x52
93#define AB8500_IT_MASK20_REG 0x53
94#define AB8500_IT_MASK21_REG 0x54
95#define AB8500_IT_MASK22_REG 0x55
96#define AB8500_IT_MASK23_REG 0x56
97#define AB8500_IT_MASK24_REG 0x57
98#define AB8500_IT_MASK25_REG 0x58
99
100/*
101 * latch hierarchy registers
102 */
103#define AB8500_IT_LATCHHIER1_REG 0x60
104#define AB8500_IT_LATCHHIER2_REG 0x61
105#define AB8500_IT_LATCHHIER3_REG 0x62
106#define AB8540_IT_LATCHHIER4_REG 0x63
107
108#define AB8500_IT_LATCHHIER_NUM 3
109#define AB8540_IT_LATCHHIER_NUM 4
110
111#define AB8500_REV_REG 0x80
112#define AB8500_IC_NAME_REG 0x82
113#define AB8500_SWITCH_OFF_STATUS 0x00
114
115#define AB8500_TURN_ON_STATUS 0x00
116#define AB8505_TURN_ON_STATUS_2 0x04
117
118#define AB8500_CH_USBCH_STAT1_REG 0x02
119#define VBUS_DET_DBNC100 0x02
120#define VBUS_DET_DBNC1 0x01
121
122static DEFINE_SPINLOCK(on_stat_lock);
123static u8 turn_on_stat_mask = 0xFF;
124static u8 turn_on_stat_set;
125static bool no_bm; /* No battery management */
126/*
127 * not really modular, but the easiest way to keep compat with existing
128 * bootargs behaviour is to continue using module_param here.
129 */
130module_param(no_bm, bool, S_IRUGO);
131
132#define AB9540_MODEM_CTRL2_REG 0x23
133#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2)
134
135/*
136 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
137 * numbers are indexed into this array with (num / 8). The interupts are
138 * defined in linux/mfd/ab8500.h
139 *
140 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
141 * offset 0.
142 */
143/* AB8500 support */
144static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
145 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
146};
147
148/* AB9540 / AB8505 support */
149static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
150 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
151};
152
153/* AB8540 support */
154static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
155 0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
156 23, 25, 26, 27, 28, 29, 30, 31,
157};
158
159static const char ab8500_version_str[][7] = {
160 [AB8500_VERSION_AB8500] = "AB8500",
161 [AB8500_VERSION_AB8505] = "AB8505",
162 [AB8500_VERSION_AB9540] = "AB9540",
163 [AB8500_VERSION_AB8540] = "AB8540",
164};
165
166static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
167{
168 int ret;
169
170 ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
171 if (ret < 0)
172 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
173 return ret;
174}
175
176static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
177 u8 data)
178{
179 int ret;
180
181 ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
182 &mask, 1);
183 if (ret < 0)
184 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
185 return ret;
186}
187
188static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
189{
190 int ret;
191 u8 data;
192
193 ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
194 if (ret < 0) {
195 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
196 return ret;
197 }
198 return (int)data;
199}
200
201static int ab8500_get_chip_id(struct device *dev)
202{
203 struct ab8500 *ab8500;
204
205 if (!dev)
206 return -EINVAL;
207 ab8500 = dev_get_drvdata(dev->parent);
208 return ab8500 ? (int)ab8500->chip_id : -EINVAL;
209}
210
211static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
212 u8 reg, u8 data)
213{
214 int ret;
215 /*
216 * Put the u8 bank and u8 register together into a an u16.
217 * The bank on higher 8 bits and register in lower 8 bits.
218 */
219 u16 addr = ((u16)bank) << 8 | reg;
220
221 dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
222
223 mutex_lock(&ab8500->lock);
224
225 ret = ab8500->write(ab8500, addr, data);
226 if (ret < 0)
227 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
228 addr, ret);
229 mutex_unlock(&ab8500->lock);
230
231 return ret;
232}
233
234static int ab8500_set_register(struct device *dev, u8 bank,
235 u8 reg, u8 value)
236{
237 int ret;
238 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
239
240 atomic_inc(&ab8500->transfer_ongoing);
241 ret = set_register_interruptible(ab8500, bank, reg, value);
242 atomic_dec(&ab8500->transfer_ongoing);
243 return ret;
244}
245
246static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
247 u8 reg, u8 *value)
248{
249 int ret;
250 u16 addr = ((u16)bank) << 8 | reg;
251
252 mutex_lock(&ab8500->lock);
253
254 ret = ab8500->read(ab8500, addr);
255 if (ret < 0)
256 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
257 addr, ret);
258 else
259 *value = ret;
260
261 mutex_unlock(&ab8500->lock);
262 dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
263
264 return (ret < 0) ? ret : 0;
265}
266
267static int ab8500_get_register(struct device *dev, u8 bank,
268 u8 reg, u8 *value)
269{
270 int ret;
271 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
272
273 atomic_inc(&ab8500->transfer_ongoing);
274 ret = get_register_interruptible(ab8500, bank, reg, value);
275 atomic_dec(&ab8500->transfer_ongoing);
276 return ret;
277}
278
279static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
280 u8 reg, u8 bitmask, u8 bitvalues)
281{
282 int ret;
283 u16 addr = ((u16)bank) << 8 | reg;
284
285 mutex_lock(&ab8500->lock);
286
287 if (ab8500->write_masked == NULL) {
288 u8 data;
289
290 ret = ab8500->read(ab8500, addr);
291 if (ret < 0) {
292 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
293 addr, ret);
294 goto out;
295 }
296
297 data = (u8)ret;
298 data = (~bitmask & data) | (bitmask & bitvalues);
299
300 ret = ab8500->write(ab8500, addr, data);
301 if (ret < 0)
302 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
303 addr, ret);
304
305 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
306 data);
307 goto out;
308 }
309 ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
310 if (ret < 0)
311 dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
312 ret);
313out:
314 mutex_unlock(&ab8500->lock);
315 return ret;
316}
317
318static int ab8500_mask_and_set_register(struct device *dev,
319 u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
320{
321 int ret;
322 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
323
324 atomic_inc(&ab8500->transfer_ongoing);
325 ret = mask_and_set_register_interruptible(ab8500, bank, reg,
326 bitmask, bitvalues);
327 atomic_dec(&ab8500->transfer_ongoing);
328 return ret;
329}
330
331static struct abx500_ops ab8500_ops = {
332 .get_chip_id = ab8500_get_chip_id,
333 .get_register = ab8500_get_register,
334 .set_register = ab8500_set_register,
335 .get_register_page = NULL,
336 .set_register_page = NULL,
337 .mask_and_set_register = ab8500_mask_and_set_register,
338 .event_registers_startup_state_get = NULL,
339 .startup_irq_enabled = NULL,
340 .dump_all_banks = ab8500_dump_all_banks,
341};
342
343static void ab8500_irq_lock(struct irq_data *data)
344{
345 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
346
347 mutex_lock(&ab8500->irq_lock);
348 atomic_inc(&ab8500->transfer_ongoing);
349}
350
351static void ab8500_irq_sync_unlock(struct irq_data *data)
352{
353 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
354 int i;
355
356 for (i = 0; i < ab8500->mask_size; i++) {
357 u8 old = ab8500->oldmask[i];
358 u8 new = ab8500->mask[i];
359 int reg;
360
361 if (new == old)
362 continue;
363
364 /*
365 * Interrupt register 12 doesn't exist prior to AB8500 version
366 * 2.0
367 */
368 if (ab8500->irq_reg_offset[i] == 11 &&
369 is_ab8500_1p1_or_earlier(ab8500))
370 continue;
371
372 if (ab8500->irq_reg_offset[i] < 0)
373 continue;
374
375 ab8500->oldmask[i] = new;
376
377 reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
378 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
379 }
380 atomic_dec(&ab8500->transfer_ongoing);
381 mutex_unlock(&ab8500->irq_lock);
382}
383
384static void ab8500_irq_mask(struct irq_data *data)
385{
386 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
387 int offset = data->hwirq;
388 int index = offset / 8;
389 int mask = 1 << (offset % 8);
390
391 ab8500->mask[index] |= mask;
392
393 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
394 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
395 ab8500->mask[index + 2] |= mask;
396 if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
397 ab8500->mask[index + 1] |= mask;
398 if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
399 /* Here the falling IRQ is one bit lower */
400 ab8500->mask[index] |= (mask << 1);
401}
402
403static void ab8500_irq_unmask(struct irq_data *data)
404{
405 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
406 unsigned int type = irqd_get_trigger_type(data);
407 int offset = data->hwirq;
408 int index = offset / 8;
409 int mask = 1 << (offset % 8);
410
411 if (type & IRQ_TYPE_EDGE_RISING)
412 ab8500->mask[index] &= ~mask;
413
414 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
415 if (type & IRQ_TYPE_EDGE_FALLING) {
416 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
417 ab8500->mask[index + 2] &= ~mask;
418 else if (offset >= AB9540_INT_GPIO50R &&
419 offset <= AB9540_INT_GPIO54R)
420 ab8500->mask[index + 1] &= ~mask;
421 else if (offset == AB8540_INT_GPIO43R ||
422 offset == AB8540_INT_GPIO44R)
423 /* Here the falling IRQ is one bit lower */
424 ab8500->mask[index] &= ~(mask << 1);
425 else
426 ab8500->mask[index] &= ~mask;
427 } else {
428 /* Satisfies the case where type is not set. */
429 ab8500->mask[index] &= ~mask;
430 }
431}
432
433static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
434{
435 return 0;
436}
437
438static struct irq_chip ab8500_irq_chip = {
439 .name = "ab8500",
440 .irq_bus_lock = ab8500_irq_lock,
441 .irq_bus_sync_unlock = ab8500_irq_sync_unlock,
442 .irq_mask = ab8500_irq_mask,
443 .irq_disable = ab8500_irq_mask,
444 .irq_unmask = ab8500_irq_unmask,
445 .irq_set_type = ab8500_irq_set_type,
446};
447
448static void update_latch_offset(u8 *offset, int i)
449{
450 /* Fix inconsistent ITFromLatch25 bit mapping... */
451 if (unlikely(*offset == 17))
452 *offset = 24;
453 /* Fix inconsistent ab8540 bit mapping... */
454 if (unlikely(*offset == 16))
455 *offset = 25;
456 if ((i == 3) && (*offset >= 24))
457 *offset += 2;
458}
459
460static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
461 int latch_offset, u8 latch_val)
462{
463 int int_bit, line, i;
464
465 for (i = 0; i < ab8500->mask_size; i++)
466 if (ab8500->irq_reg_offset[i] == latch_offset)
467 break;
468
469 if (i >= ab8500->mask_size) {
470 dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
471 latch_offset);
472 return -ENXIO;
473 }
474
475 /* ignore masked out interrupts */
476 latch_val &= ~ab8500->mask[i];
477
478 while (latch_val) {
479 int_bit = __ffs(latch_val);
480 line = (i << 3) + int_bit;
481 latch_val &= ~(1 << int_bit);
482
483 /*
484 * This handles the falling edge hwirqs from the GPIO
485 * lines. Route them back to the line registered for the
486 * rising IRQ, as this is merely a flag for the same IRQ
487 * in linux terms.
488 */
489 if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
490 line -= 16;
491 if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
492 line -= 8;
493 if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
494 line += 1;
495
496 handle_nested_irq(irq_create_mapping(ab8500->domain, line));
497 }
498
499 return 0;
500}
501
502static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
503 int hier_offset, u8 hier_val)
504{
505 int latch_bit, status;
506 u8 latch_offset, latch_val;
507
508 do {
509 latch_bit = __ffs(hier_val);
510 latch_offset = (hier_offset << 3) + latch_bit;
511
512 update_latch_offset(&latch_offset, hier_offset);
513
514 status = get_register_interruptible(ab8500,
515 AB8500_INTERRUPT,
516 AB8500_IT_LATCH1_REG + latch_offset,
517 &latch_val);
518 if (status < 0 || latch_val == 0)
519 goto discard;
520
521 status = ab8500_handle_hierarchical_line(ab8500,
522 latch_offset, latch_val);
523 if (status < 0)
524 return status;
525discard:
526 hier_val &= ~(1 << latch_bit);
527 } while (hier_val);
528
529 return 0;
530}
531
532static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
533{
534 struct ab8500 *ab8500 = dev;
535 u8 i;
536
537 dev_vdbg(ab8500->dev, "interrupt\n");
538
539 /* Hierarchical interrupt version */
540 for (i = 0; i < (ab8500->it_latchhier_num); i++) {
541 int status;
542 u8 hier_val;
543
544 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
545 AB8500_IT_LATCHHIER1_REG + i, &hier_val);
546 if (status < 0 || hier_val == 0)
547 continue;
548
549 status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
550 if (status < 0)
551 break;
552 }
553 return IRQ_HANDLED;
554}
555
556static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
557 irq_hw_number_t hwirq)
558{
559 struct ab8500 *ab8500 = d->host_data;
560
561 if (!ab8500)
562 return -EINVAL;
563
564 irq_set_chip_data(virq, ab8500);
565 irq_set_chip_and_handler(virq, &ab8500_irq_chip,
566 handle_simple_irq);
567 irq_set_nested_thread(virq, 1);
568 irq_set_noprobe(virq);
569
570 return 0;
571}
572
573static const struct irq_domain_ops ab8500_irq_ops = {
574 .map = ab8500_irq_map,
575 .xlate = irq_domain_xlate_twocell,
576};
577
578static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
579{
580 int num_irqs;
581
582 if (is_ab8540(ab8500))
583 num_irqs = AB8540_NR_IRQS;
584 else if (is_ab9540(ab8500))
585 num_irqs = AB9540_NR_IRQS;
586 else if (is_ab8505(ab8500))
587 num_irqs = AB8505_NR_IRQS;
588 else
589 num_irqs = AB8500_NR_IRQS;
590
591 /* If ->irq_base is zero this will give a linear mapping */
592 ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
593 num_irqs, 0,
594 &ab8500_irq_ops, ab8500);
595
596 if (!ab8500->domain) {
597 dev_err(ab8500->dev, "Failed to create irqdomain\n");
598 return -ENODEV;
599 }
600
601 return 0;
602}
603
604int ab8500_suspend(struct ab8500 *ab8500)
605{
606 if (atomic_read(&ab8500->transfer_ongoing))
607 return -EINVAL;
608
609 return 0;
610}
611
612static const struct mfd_cell ab8500_bm_devs[] = {
613 OF_MFD_CELL("ab8500-charger", NULL, &ab8500_bm_data,
614 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-charger"),
615 OF_MFD_CELL("ab8500-btemp", NULL, &ab8500_bm_data,
616 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-btemp"),
617 OF_MFD_CELL("ab8500-fg", NULL, &ab8500_bm_data,
618 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-fg"),
619 OF_MFD_CELL("ab8500-chargalg", NULL, &ab8500_bm_data,
620 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-chargalg"),
621};
622
623static const struct mfd_cell ab8500_devs[] = {
624#ifdef CONFIG_DEBUG_FS
625 OF_MFD_CELL("ab8500-debug",
626 NULL, NULL, 0, 0, "stericsson,ab8500-debug"),
627#endif
628 OF_MFD_CELL("ab8500-sysctrl",
629 NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"),
630 OF_MFD_CELL("ab8500-ext-regulator",
631 NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"),
632 OF_MFD_CELL("ab8500-regulator",
633 NULL, NULL, 0, 0, "stericsson,ab8500-regulator"),
634 OF_MFD_CELL("ab8500-clk",
635 NULL, NULL, 0, 0, "stericsson,ab8500-clk"),
636 OF_MFD_CELL("ab8500-gpadc",
637 NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"),
638 OF_MFD_CELL("ab8500-rtc",
639 NULL, NULL, 0, 0, "stericsson,ab8500-rtc"),
640 OF_MFD_CELL("ab8500-acc-det",
641 NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"),
642 OF_MFD_CELL("ab8500-poweron-key",
643 NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"),
644 OF_MFD_CELL("ab8500-pwm",
645 NULL, NULL, 0, 1, "stericsson,ab8500-pwm"),
646 OF_MFD_CELL("ab8500-pwm",
647 NULL, NULL, 0, 2, "stericsson,ab8500-pwm"),
648 OF_MFD_CELL("ab8500-pwm",
649 NULL, NULL, 0, 3, "stericsson,ab8500-pwm"),
650 OF_MFD_CELL("ab8500-denc",
651 NULL, NULL, 0, 0, "stericsson,ab8500-denc"),
652 OF_MFD_CELL("pinctrl-ab8500",
653 NULL, NULL, 0, 0, "stericsson,ab8500-gpio"),
654 OF_MFD_CELL("abx500-temp",
655 NULL, NULL, 0, 0, "stericsson,abx500-temp"),
656 OF_MFD_CELL("ab8500-usb",
657 NULL, NULL, 0, 0, "stericsson,ab8500-usb"),
658 OF_MFD_CELL("ab8500-codec",
659 NULL, NULL, 0, 0, "stericsson,ab8500-codec"),
660};
661
662static const struct mfd_cell ab9540_devs[] = {
663#ifdef CONFIG_DEBUG_FS
664 {
665 .name = "ab8500-debug",
666 },
667#endif
668 {
669 .name = "ab8500-sysctrl",
670 },
671 {
672 .name = "ab8500-ext-regulator",
673 },
674 {
675 .name = "ab8500-regulator",
676 },
677 {
678 .name = "abx500-clk",
679 .of_compatible = "stericsson,abx500-clk",
680 },
681 {
682 .name = "ab8500-gpadc",
683 .of_compatible = "stericsson,ab8500-gpadc",
684 },
685 {
686 .name = "ab8500-rtc",
687 },
688 {
689 .name = "ab8500-acc-det",
690 },
691 {
692 .name = "ab8500-poweron-key",
693 },
694 {
695 .name = "ab8500-pwm",
696 .id = 1,
697 },
698 {
699 .name = "abx500-temp",
700 },
701 {
702 .name = "pinctrl-ab9540",
703 .of_compatible = "stericsson,ab9540-gpio",
704 },
705 {
706 .name = "ab9540-usb",
707 },
708 {
709 .name = "ab9540-codec",
710 },
711 {
712 .name = "ab-iddet",
713 },
714};
715
716/* Device list for ab8505 */
717static const struct mfd_cell ab8505_devs[] = {
718#ifdef CONFIG_DEBUG_FS
719 {
720 .name = "ab8500-debug",
721 .of_compatible = "stericsson,ab8500-debug",
722 },
723#endif
724 {
725 .name = "ab8500-sysctrl",
726 .of_compatible = "stericsson,ab8500-sysctrl",
727 },
728 {
729 .name = "ab8500-regulator",
730 .of_compatible = "stericsson,ab8505-regulator",
731 },
732 {
733 .name = "abx500-clk",
734 .of_compatible = "stericsson,ab8500-clk",
735 },
736 {
737 .name = "ab8500-gpadc",
738 .of_compatible = "stericsson,ab8500-gpadc",
739 },
740 {
741 .name = "ab8500-rtc",
742 .of_compatible = "stericsson,ab8500-rtc",
743 },
744 {
745 .name = "ab8500-acc-det",
746 .of_compatible = "stericsson,ab8500-acc-det",
747 },
748 {
749 .name = "ab8500-poweron-key",
750 .of_compatible = "stericsson,ab8500-poweron-key",
751 },
752 {
753 .name = "ab8500-pwm",
754 .of_compatible = "stericsson,ab8500-pwm",
755 .id = 1,
756 },
757 {
758 .name = "pinctrl-ab8505",
759 .of_compatible = "stericsson,ab8505-gpio",
760 },
761 {
762 .name = "ab8500-usb",
763 .of_compatible = "stericsson,ab8500-usb",
764 },
765 {
766 .name = "ab8500-codec",
767 .of_compatible = "stericsson,ab8500-codec",
768 },
769 {
770 .name = "ab-iddet",
771 },
772};
773
774static const struct mfd_cell ab8540_devs[] = {
775#ifdef CONFIG_DEBUG_FS
776 {
777 .name = "ab8500-debug",
778 },
779#endif
780 {
781 .name = "ab8500-sysctrl",
782 },
783 {
784 .name = "ab8500-ext-regulator",
785 },
786 {
787 .name = "ab8500-regulator",
788 },
789 {
790 .name = "abx500-clk",
791 .of_compatible = "stericsson,abx500-clk",
792 },
793 {
794 .name = "ab8500-gpadc",
795 .of_compatible = "stericsson,ab8500-gpadc",
796 },
797 {
798 .name = "ab8500-acc-det",
799 },
800 {
801 .name = "ab8500-poweron-key",
802 },
803 {
804 .name = "ab8500-pwm",
805 .id = 1,
806 },
807 {
808 .name = "abx500-temp",
809 },
810 {
811 .name = "pinctrl-ab8540",
812 },
813 {
814 .name = "ab8540-usb",
815 },
816 {
817 .name = "ab8540-codec",
818 },
819 {
820 .name = "ab-iddet",
821 },
822};
823
824static const struct mfd_cell ab8540_cut1_devs[] = {
825 {
826 .name = "ab8500-rtc",
827 .of_compatible = "stericsson,ab8500-rtc",
828 },
829};
830
831static const struct mfd_cell ab8540_cut2_devs[] = {
832 {
833 .name = "ab8540-rtc",
834 .of_compatible = "stericsson,ab8540-rtc",
835 },
836};
837
838static ssize_t show_chip_id(struct device *dev,
839 struct device_attribute *attr, char *buf)
840{
841 struct ab8500 *ab8500;
842
843 ab8500 = dev_get_drvdata(dev);
844
845 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
846}
847
848/*
849 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
850 * 0x01 Swoff bit programming
851 * 0x02 Thermal protection activation
852 * 0x04 Vbat lower then BattOk falling threshold
853 * 0x08 Watchdog expired
854 * 0x10 Non presence of 32kHz clock
855 * 0x20 Battery level lower than power on reset threshold
856 * 0x40 Power on key 1 pressed longer than 10 seconds
857 * 0x80 DB8500 thermal shutdown
858 */
859static ssize_t show_switch_off_status(struct device *dev,
860 struct device_attribute *attr, char *buf)
861{
862 int ret;
863 u8 value;
864 struct ab8500 *ab8500;
865
866 ab8500 = dev_get_drvdata(dev);
867 ret = get_register_interruptible(ab8500, AB8500_RTC,
868 AB8500_SWITCH_OFF_STATUS, &value);
869 if (ret < 0)
870 return ret;
871 return sprintf(buf, "%#x\n", value);
872}
873
874/* use mask and set to override the register turn_on_stat value */
875void ab8500_override_turn_on_stat(u8 mask, u8 set)
876{
877 spin_lock(&on_stat_lock);
878 turn_on_stat_mask = mask;
879 turn_on_stat_set = set;
880 spin_unlock(&on_stat_lock);
881}
882
883/*
884 * ab8500 has turned on due to (TURN_ON_STATUS):
885 * 0x01 PORnVbat
886 * 0x02 PonKey1dbF
887 * 0x04 PonKey2dbF
888 * 0x08 RTCAlarm
889 * 0x10 MainChDet
890 * 0x20 VbusDet
891 * 0x40 UsbIDDetect
892 * 0x80 Reserved
893 */
894static ssize_t show_turn_on_status(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 AB8500_TURN_ON_STATUS, &value);
904 if (ret < 0)
905 return ret;
906
907 /*
908 * In L9540, turn_on_status register is not updated correctly if
909 * the device is rebooted with AC/USB charger connected. Due to
910 * this, the device boots android instead of entering into charge
911 * only mode. Read the AC/USB status register to detect the charger
912 * presence and update the turn on status manually.
913 */
914 if (is_ab9540(ab8500)) {
915 spin_lock(&on_stat_lock);
916 value = (value & turn_on_stat_mask) | turn_on_stat_set;
917 spin_unlock(&on_stat_lock);
918 }
919
920 return sprintf(buf, "%#x\n", value);
921}
922
923static ssize_t show_turn_on_status_2(struct device *dev,
924 struct device_attribute *attr, char *buf)
925{
926 int ret;
927 u8 value;
928 struct ab8500 *ab8500;
929
930 ab8500 = dev_get_drvdata(dev);
931 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
932 AB8505_TURN_ON_STATUS_2, &value);
933 if (ret < 0)
934 return ret;
935 return sprintf(buf, "%#x\n", (value & 0x1));
936}
937
938static ssize_t show_ab9540_dbbrstn(struct device *dev,
939 struct device_attribute *attr, char *buf)
940{
941 struct ab8500 *ab8500;
942 int ret;
943 u8 value;
944
945 ab8500 = dev_get_drvdata(dev);
946
947 ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
948 AB9540_MODEM_CTRL2_REG, &value);
949 if (ret < 0)
950 return ret;
951
952 return sprintf(buf, "%d\n",
953 (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
954}
955
956static ssize_t store_ab9540_dbbrstn(struct device *dev,
957 struct device_attribute *attr, const char *buf, size_t count)
958{
959 struct ab8500 *ab8500;
960 int ret = count;
961 int err;
962 u8 bitvalues;
963
964 ab8500 = dev_get_drvdata(dev);
965
966 if (count > 0) {
967 switch (buf[0]) {
968 case '0':
969 bitvalues = 0;
970 break;
971 case '1':
972 bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
973 break;
974 default:
975 goto exit;
976 }
977
978 err = mask_and_set_register_interruptible(ab8500,
979 AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
980 AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
981 if (err)
982 dev_info(ab8500->dev,
983 "Failed to set DBBRSTN %c, err %#x\n",
984 buf[0], err);
985 }
986
987exit:
988 return ret;
989}
990
991static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
992static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
993static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
994static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL);
995static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
996 show_ab9540_dbbrstn, store_ab9540_dbbrstn);
997
998static struct attribute *ab8500_sysfs_entries[] = {
999 &dev_attr_chip_id.attr,
1000 &dev_attr_switch_off_status.attr,
1001 &dev_attr_turn_on_status.attr,
1002 NULL,
1003};
1004
1005static struct attribute *ab8505_sysfs_entries[] = {
1006 &dev_attr_turn_on_status_2.attr,
1007 NULL,
1008};
1009
1010static struct attribute *ab9540_sysfs_entries[] = {
1011 &dev_attr_chip_id.attr,
1012 &dev_attr_switch_off_status.attr,
1013 &dev_attr_turn_on_status.attr,
1014 &dev_attr_dbbrstn.attr,
1015 NULL,
1016};
1017
1018static const struct attribute_group ab8500_attr_group = {
1019 .attrs = ab8500_sysfs_entries,
1020};
1021
1022static const struct attribute_group ab8505_attr_group = {
1023 .attrs = ab8505_sysfs_entries,
1024};
1025
1026static const struct attribute_group ab9540_attr_group = {
1027 .attrs = ab9540_sysfs_entries,
1028};
1029
1030static int ab8500_probe(struct platform_device *pdev)
1031{
1032 static const char * const switch_off_status[] = {
1033 "Swoff bit programming",
1034 "Thermal protection activation",
1035 "Vbat lower then BattOk falling threshold",
1036 "Watchdog expired",
1037 "Non presence of 32kHz clock",
1038 "Battery level lower than power on reset threshold",
1039 "Power on key 1 pressed longer than 10 seconds",
1040 "DB8500 thermal shutdown"};
1041 static const char * const turn_on_status[] = {
1042 "Battery rising (Vbat)",
1043 "Power On Key 1 dbF",
1044 "Power On Key 2 dbF",
1045 "RTC Alarm",
1046 "Main Charger Detect",
1047 "Vbus Detect (USB)",
1048 "USB ID Detect",
1049 "UART Factory Mode Detect"};
1050 const struct platform_device_id *platid = platform_get_device_id(pdev);
1051 enum ab8500_version version = AB8500_VERSION_UNDEFINED;
1052 struct device_node *np = pdev->dev.of_node;
1053 struct ab8500 *ab8500;
1054 struct resource *resource;
1055 int ret;
1056 int i;
1057 u8 value;
1058
1059 ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
1060 if (!ab8500)
1061 return -ENOMEM;
1062
1063 ab8500->dev = &pdev->dev;
1064
1065 resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1066 if (!resource) {
1067 dev_err(&pdev->dev, "no IRQ resource\n");
1068 return -ENODEV;
1069 }
1070
1071 ab8500->irq = resource->start;
1072
1073 ab8500->read = ab8500_prcmu_read;
1074 ab8500->write = ab8500_prcmu_write;
1075 ab8500->write_masked = ab8500_prcmu_write_masked;
1076
1077 mutex_init(&ab8500->lock);
1078 mutex_init(&ab8500->irq_lock);
1079 atomic_set(&ab8500->transfer_ongoing, 0);
1080
1081 platform_set_drvdata(pdev, ab8500);
1082
1083 if (platid)
1084 version = platid->driver_data;
1085
1086 if (version != AB8500_VERSION_UNDEFINED)
1087 ab8500->version = version;
1088 else {
1089 ret = get_register_interruptible(ab8500, AB8500_MISC,
1090 AB8500_IC_NAME_REG, &value);
1091 if (ret < 0) {
1092 dev_err(&pdev->dev, "could not probe HW\n");
1093 return ret;
1094 }
1095
1096 ab8500->version = value;
1097 }
1098
1099 ret = get_register_interruptible(ab8500, AB8500_MISC,
1100 AB8500_REV_REG, &value);
1101 if (ret < 0)
1102 return ret;
1103
1104 ab8500->chip_id = value;
1105
1106 dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
1107 ab8500_version_str[ab8500->version],
1108 ab8500->chip_id >> 4,
1109 ab8500->chip_id & 0x0F);
1110
1111 /* Configure AB8540 */
1112 if (is_ab8540(ab8500)) {
1113 ab8500->mask_size = AB8540_NUM_IRQ_REGS;
1114 ab8500->irq_reg_offset = ab8540_irq_regoffset;
1115 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
1116 } /* Configure AB8500 or AB9540 IRQ */
1117 else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
1118 ab8500->mask_size = AB9540_NUM_IRQ_REGS;
1119 ab8500->irq_reg_offset = ab9540_irq_regoffset;
1120 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1121 } else {
1122 ab8500->mask_size = AB8500_NUM_IRQ_REGS;
1123 ab8500->irq_reg_offset = ab8500_irq_regoffset;
1124 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1125 }
1126 ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1127 GFP_KERNEL);
1128 if (!ab8500->mask)
1129 return -ENOMEM;
1130 ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1131 GFP_KERNEL);
1132 if (!ab8500->oldmask)
1133 return -ENOMEM;
1134
1135 /*
1136 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
1137 * 0x01 Swoff bit programming
1138 * 0x02 Thermal protection activation
1139 * 0x04 Vbat lower then BattOk falling threshold
1140 * 0x08 Watchdog expired
1141 * 0x10 Non presence of 32kHz clock
1142 * 0x20 Battery level lower than power on reset threshold
1143 * 0x40 Power on key 1 pressed longer than 10 seconds
1144 * 0x80 DB8500 thermal shutdown
1145 */
1146
1147 ret = get_register_interruptible(ab8500, AB8500_RTC,
1148 AB8500_SWITCH_OFF_STATUS, &value);
1149 if (ret < 0)
1150 return ret;
1151 dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
1152
1153 if (value) {
1154 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
1155 if (value & 1)
1156 pr_cont(" \"%s\"", switch_off_status[i]);
1157 value = value >> 1;
1158
1159 }
1160 pr_cont("\n");
1161 } else {
1162 pr_cont(" None\n");
1163 }
1164 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
1165 AB8500_TURN_ON_STATUS, &value);
1166 if (ret < 0)
1167 return ret;
1168 dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
1169
1170 if (value) {
1171 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
1172 if (value & 1)
1173 pr_cont("\"%s\" ", turn_on_status[i]);
1174 value = value >> 1;
1175 }
1176 pr_cont("\n");
1177 } else {
1178 pr_cont("None\n");
1179 }
1180
1181 if (is_ab9540(ab8500)) {
1182 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
1183 AB8500_CH_USBCH_STAT1_REG, &value);
1184 if (ret < 0)
1185 return ret;
1186 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
1187 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1188 AB8500_VBUS_DET);
1189 }
1190
1191 /* Clear and mask all interrupts */
1192 for (i = 0; i < ab8500->mask_size; i++) {
1193 /*
1194 * Interrupt register 12 doesn't exist prior to AB8500 version
1195 * 2.0
1196 */
1197 if (ab8500->irq_reg_offset[i] == 11 &&
1198 is_ab8500_1p1_or_earlier(ab8500))
1199 continue;
1200
1201 if (ab8500->irq_reg_offset[i] < 0)
1202 continue;
1203
1204 get_register_interruptible(ab8500, AB8500_INTERRUPT,
1205 AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
1206 &value);
1207 set_register_interruptible(ab8500, AB8500_INTERRUPT,
1208 AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
1209 }
1210
1211 ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
1212 if (ret)
1213 return ret;
1214
1215 for (i = 0; i < ab8500->mask_size; i++)
1216 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
1217
1218 ret = ab8500_irq_init(ab8500, np);
1219 if (ret)
1220 return ret;
1221
1222 ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
1223 ab8500_hierarchical_irq,
1224 IRQF_ONESHOT | IRQF_NO_SUSPEND,
1225 "ab8500", ab8500);
1226 if (ret)
1227 return ret;
1228
1229 if (is_ab9540(ab8500))
1230 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
1231 ARRAY_SIZE(ab9540_devs), NULL,
1232 0, ab8500->domain);
1233 else if (is_ab8540(ab8500)) {
1234 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
1235 ARRAY_SIZE(ab8540_devs), NULL,
1236 0, ab8500->domain);
1237 if (ret)
1238 return ret;
1239
1240 if (is_ab8540_1p2_or_earlier(ab8500))
1241 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
1242 ARRAY_SIZE(ab8540_cut1_devs), NULL,
1243 0, ab8500->domain);
1244 else /* ab8540 >= cut2 */
1245 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
1246 ARRAY_SIZE(ab8540_cut2_devs), NULL,
1247 0, ab8500->domain);
1248 } else if (is_ab8505(ab8500))
1249 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
1250 ARRAY_SIZE(ab8505_devs), NULL,
1251 0, ab8500->domain);
1252 else
1253 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
1254 ARRAY_SIZE(ab8500_devs), NULL,
1255 0, ab8500->domain);
1256 if (ret)
1257 return ret;
1258
1259 if (!no_bm) {
1260 /* Add battery management devices */
1261 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
1262 ARRAY_SIZE(ab8500_bm_devs), NULL,
1263 0, ab8500->domain);
1264 if (ret)
1265 dev_err(ab8500->dev, "error adding bm devices\n");
1266 }
1267
1268 if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1269 ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1270 ret = sysfs_create_group(&ab8500->dev->kobj,
1271 &ab9540_attr_group);
1272 else
1273 ret = sysfs_create_group(&ab8500->dev->kobj,
1274 &ab8500_attr_group);
1275
1276 if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1277 ab8500->chip_id >= AB8500_CUT2P0)
1278 ret = sysfs_create_group(&ab8500->dev->kobj,
1279 &ab8505_attr_group);
1280
1281 if (ret)
1282 dev_err(ab8500->dev, "error creating sysfs entries\n");
1283
1284 return ret;
1285}
1286
1287static const struct platform_device_id ab8500_id[] = {
1288 { "ab8500-core", AB8500_VERSION_AB8500 },
1289 { "ab8505-core", AB8500_VERSION_AB8505 },
1290 { "ab9540-i2c", AB8500_VERSION_AB9540 },
1291 { "ab8540-i2c", AB8500_VERSION_AB8540 },
1292 { }
1293};
1294
1295static struct platform_driver ab8500_core_driver = {
1296 .driver = {
1297 .name = "ab8500-core",
1298 .suppress_bind_attrs = true,
1299 },
1300 .probe = ab8500_probe,
1301 .id_table = ab8500_id,
1302};
1303
1304static int __init ab8500_core_init(void)
1305{
1306 return platform_driver_register(&ab8500_core_driver);
1307}
1308core_initcall(ab8500_core_init);