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pinctrl: samsung: Fix device node refcount leaks in S3C64xx wakeup controller init
[linux/fpc-iii.git] / drivers / pinctrl / samsung / pinctrl-s3c64xx.c
blobf97f8179f2b1b591d7f55f940c6e4cf4e723b60c
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // S3C64xx specific support for pinctrl-samsung driver.
4 //
5 // Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
6 //
7 // Based on pinctrl-exynos.c, please see the file for original copyrights.
8 //
9 // This file contains the Samsung S3C64xx specific information required by the
10 // the Samsung pinctrl/gpiolib driver. It also includes the implementation of
11 // external gpio and wakeup interrupt support.
12
13 #include <linux/init.h>
14 #include <linux/device.h>
15 #include <linux/interrupt.h>
16 #include <linux/irqdomain.h>
17 #include <linux/irq.h>
18 #include <linux/of_irq.h>
19 #include <linux/io.h>
20 #include <linux/irqchip/chained_irq.h>
21 #include <linux/slab.h>
22 #include <linux/err.h>
23
24 #include "pinctrl-samsung.h"
25
26 #define NUM_EINT0 28
27 #define NUM_EINT0_IRQ 4
28 #define EINT_MAX_PER_REG 16
29 #define EINT_MAX_PER_GROUP 16
30
31 /* External GPIO and wakeup interrupt related definitions */
32 #define SVC_GROUP_SHIFT 4
33 #define SVC_GROUP_MASK 0xf
34 #define SVC_NUM_MASK 0xf
35 #define SVC_GROUP(x) ((x >> SVC_GROUP_SHIFT) & \
36 SVC_GROUP_MASK)
37
38 #define EINT12CON_REG 0x200
39 #define EINT12MASK_REG 0x240
40 #define EINT12PEND_REG 0x260
41
42 #define EINT_OFFS(i) ((i) % (2 * EINT_MAX_PER_GROUP))
43 #define EINT_GROUP(i) ((i) / EINT_MAX_PER_GROUP)
44 #define EINT_REG(g) (4 * ((g) / 2))
45
46 #define EINTCON_REG(i) (EINT12CON_REG + EINT_REG(EINT_GROUP(i)))
47 #define EINTMASK_REG(i) (EINT12MASK_REG + EINT_REG(EINT_GROUP(i)))
48 #define EINTPEND_REG(i) (EINT12PEND_REG + EINT_REG(EINT_GROUP(i)))
49
50 #define SERVICE_REG 0x284
51 #define SERVICEPEND_REG 0x288
52
53 #define EINT0CON0_REG 0x900
54 #define EINT0MASK_REG 0x920
55 #define EINT0PEND_REG 0x924
56
57 /* S3C64xx specific external interrupt trigger types */
58 #define EINT_LEVEL_LOW 0
59 #define EINT_LEVEL_HIGH 1
60 #define EINT_EDGE_FALLING 2
61 #define EINT_EDGE_RISING 4
62 #define EINT_EDGE_BOTH 6
63 #define EINT_CON_MASK 0xF
64 #define EINT_CON_LEN 4
65
66 static const struct samsung_pin_bank_type bank_type_4bit_off = {
67 .fld_width = { 4, 1, 2, 0, 2, 2, },
68 .reg_offset = { 0x00, 0x04, 0x08, 0, 0x0c, 0x10, },
69 };
70
71 static const struct samsung_pin_bank_type bank_type_4bit_alive = {
72 .fld_width = { 4, 1, 2, },
73 .reg_offset = { 0x00, 0x04, 0x08, },
74 };
75
76 static const struct samsung_pin_bank_type bank_type_4bit2_off = {
77 .fld_width = { 4, 1, 2, 0, 2, 2, },
78 .reg_offset = { 0x00, 0x08, 0x0c, 0, 0x10, 0x14, },
79 };
80
81 static const struct samsung_pin_bank_type bank_type_4bit2_alive = {
82 .fld_width = { 4, 1, 2, },
83 .reg_offset = { 0x00, 0x08, 0x0c, },
84 };
85
86 static const struct samsung_pin_bank_type bank_type_2bit_off = {
87 .fld_width = { 2, 1, 2, 0, 2, 2, },
88 .reg_offset = { 0x00, 0x04, 0x08, 0, 0x0c, 0x10, },
89 };
90
91 static const struct samsung_pin_bank_type bank_type_2bit_alive = {
92 .fld_width = { 2, 1, 2, },
93 .reg_offset = { 0x00, 0x04, 0x08, },
94 };
95
96 #define PIN_BANK_4BIT(pins, reg, id) \
97 { \
98 .type = &bank_type_4bit_off, \
99 .pctl_offset = reg, \
100 .nr_pins = pins, \
101 .eint_type = EINT_TYPE_NONE, \
102 .name = id \
103 }
104
105 #define PIN_BANK_4BIT_EINTG(pins, reg, id, eoffs) \
106 { \
107 .type = &bank_type_4bit_off, \
108 .pctl_offset = reg, \
109 .nr_pins = pins, \
110 .eint_type = EINT_TYPE_GPIO, \
111 .eint_func = 7, \
112 .eint_mask = (1 << (pins)) - 1, \
113 .eint_offset = eoffs, \
114 .name = id \
115 }
116
117 #define PIN_BANK_4BIT_EINTW(pins, reg, id, eoffs, emask) \
118 { \
119 .type = &bank_type_4bit_alive,\
120 .pctl_offset = reg, \
121 .nr_pins = pins, \
122 .eint_type = EINT_TYPE_WKUP, \
123 .eint_func = 3, \
124 .eint_mask = emask, \
125 .eint_offset = eoffs, \
126 .name = id \
127 }
128
129 #define PIN_BANK_4BIT2_EINTG(pins, reg, id, eoffs) \
130 { \
131 .type = &bank_type_4bit2_off, \
132 .pctl_offset = reg, \
133 .nr_pins = pins, \
134 .eint_type = EINT_TYPE_GPIO, \
135 .eint_func = 7, \
136 .eint_mask = (1 << (pins)) - 1, \
137 .eint_offset = eoffs, \
138 .name = id \
139 }
140
141 #define PIN_BANK_4BIT2_EINTW(pins, reg, id, eoffs, emask) \
142 { \
143 .type = &bank_type_4bit2_alive,\
144 .pctl_offset = reg, \
145 .nr_pins = pins, \
146 .eint_type = EINT_TYPE_WKUP, \
147 .eint_func = 3, \
148 .eint_mask = emask, \
149 .eint_offset = eoffs, \
150 .name = id \
151 }
152
153 #define PIN_BANK_4BIT2_ALIVE(pins, reg, id) \
154 { \
155 .type = &bank_type_4bit2_alive,\
156 .pctl_offset = reg, \
157 .nr_pins = pins, \
158 .eint_type = EINT_TYPE_NONE, \
159 .name = id \
160 }
161
162 #define PIN_BANK_2BIT(pins, reg, id) \
163 { \
164 .type = &bank_type_2bit_off, \
165 .pctl_offset = reg, \
166 .nr_pins = pins, \
167 .eint_type = EINT_TYPE_NONE, \
168 .name = id \
169 }
170
171 #define PIN_BANK_2BIT_EINTG(pins, reg, id, eoffs, emask) \
172 { \
173 .type = &bank_type_2bit_off, \
174 .pctl_offset = reg, \
175 .nr_pins = pins, \
176 .eint_type = EINT_TYPE_GPIO, \
177 .eint_func = 3, \
178 .eint_mask = emask, \
179 .eint_offset = eoffs, \
180 .name = id \
181 }
182
183 #define PIN_BANK_2BIT_EINTW(pins, reg, id, eoffs) \
184 { \
185 .type = &bank_type_2bit_alive,\
186 .pctl_offset = reg, \
187 .nr_pins = pins, \
188 .eint_type = EINT_TYPE_WKUP, \
189 .eint_func = 2, \
190 .eint_mask = (1 << (pins)) - 1, \
191 .eint_offset = eoffs, \
192 .name = id \
193 }
194
195 /**
196 * struct s3c64xx_eint0_data: EINT0 common data
197 * @drvdata: pin controller driver data
198 * @domains: IRQ domains of particular EINT0 interrupts
199 * @pins: pin offsets inside of banks of particular EINT0 interrupts
200 */
201 struct s3c64xx_eint0_data {
202 struct samsung_pinctrl_drv_data *drvdata;
203 struct irq_domain *domains[NUM_EINT0];
204 u8 pins[NUM_EINT0];
205 };
206
207 /**
208 * struct s3c64xx_eint0_domain_data: EINT0 per-domain data
209 * @bank: pin bank related to the domain
210 * @eints: EINT0 interrupts related to the domain
211 */
212 struct s3c64xx_eint0_domain_data {
213 struct samsung_pin_bank *bank;
214 u8 eints[];
215 };
216
217 /**
218 * struct s3c64xx_eint_gpio_data: GPIO EINT data
219 * @drvdata: pin controller driver data
220 * @domains: array of domains related to EINT interrupt groups
221 */
222 struct s3c64xx_eint_gpio_data {
223 struct samsung_pinctrl_drv_data *drvdata;
224 struct irq_domain *domains[];
225 };
226
227 /*
228 * Common functions for S3C64xx EINT configuration
229 */
230
231 static int s3c64xx_irq_get_trigger(unsigned int type)
232 {
233 int trigger;
234
235 switch (type) {
236 case IRQ_TYPE_EDGE_RISING:
237 trigger = EINT_EDGE_RISING;
238 break;
239 case IRQ_TYPE_EDGE_FALLING:
240 trigger = EINT_EDGE_FALLING;
241 break;
242 case IRQ_TYPE_EDGE_BOTH:
243 trigger = EINT_EDGE_BOTH;
244 break;
245 case IRQ_TYPE_LEVEL_HIGH:
246 trigger = EINT_LEVEL_HIGH;
247 break;
248 case IRQ_TYPE_LEVEL_LOW:
249 trigger = EINT_LEVEL_LOW;
250 break;
251 default:
252 return -EINVAL;
253 }
254
255 return trigger;
256 }
257
258 static void s3c64xx_irq_set_handler(struct irq_data *d, unsigned int type)
259 {
260 /* Edge- and level-triggered interrupts need different handlers */
261 if (type & IRQ_TYPE_EDGE_BOTH)
262 irq_set_handler_locked(d, handle_edge_irq);
263 else
264 irq_set_handler_locked(d, handle_level_irq);
265 }
266
267 static void s3c64xx_irq_set_function(struct samsung_pinctrl_drv_data *d,
268 struct samsung_pin_bank *bank, int pin)
269 {
270 const struct samsung_pin_bank_type *bank_type = bank->type;
271 unsigned long flags;
272 void __iomem *reg;
273 u8 shift;
274 u32 mask;
275 u32 val;
276
277 /* Make sure that pin is configured as interrupt */
278 reg = d->virt_base + bank->pctl_offset;
279 shift = pin;
280 if (bank_type->fld_width[PINCFG_TYPE_FUNC] * shift >= 32) {
281 /* 4-bit bank type with 2 con regs */
282 reg += 4;
283 shift -= 8;
284 }
285
286 shift = shift * bank_type->fld_width[PINCFG_TYPE_FUNC];
287 mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
288
289 spin_lock_irqsave(&bank->slock, flags);
290
291 val = readl(reg);
292 val &= ~(mask << shift);
293 val |= bank->eint_func << shift;
294 writel(val, reg);
295
296 spin_unlock_irqrestore(&bank->slock, flags);
297 }
298
299 /*
300 * Functions for EINT GPIO configuration (EINT groups 1-9)
301 */
302
303 static inline void s3c64xx_gpio_irq_set_mask(struct irq_data *irqd, bool mask)
304 {
305 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
306 struct samsung_pinctrl_drv_data *d = bank->drvdata;
307 unsigned char index = EINT_OFFS(bank->eint_offset) + irqd->hwirq;
308 void __iomem *reg = d->virt_base + EINTMASK_REG(bank->eint_offset);
309 u32 val;
310
311 val = readl(reg);
312 if (mask)
313 val |= 1 << index;
314 else
315 val &= ~(1 << index);
316 writel(val, reg);
317 }
318
319 static void s3c64xx_gpio_irq_unmask(struct irq_data *irqd)
320 {
321 s3c64xx_gpio_irq_set_mask(irqd, false);
322 }
323
324 static void s3c64xx_gpio_irq_mask(struct irq_data *irqd)
325 {
326 s3c64xx_gpio_irq_set_mask(irqd, true);
327 }
328
329 static void s3c64xx_gpio_irq_ack(struct irq_data *irqd)
330 {
331 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
332 struct samsung_pinctrl_drv_data *d = bank->drvdata;
333 unsigned char index = EINT_OFFS(bank->eint_offset) + irqd->hwirq;
334 void __iomem *reg = d->virt_base + EINTPEND_REG(bank->eint_offset);
335
336 writel(1 << index, reg);
337 }
338
339 static int s3c64xx_gpio_irq_set_type(struct irq_data *irqd, unsigned int type)
340 {
341 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
342 struct samsung_pinctrl_drv_data *d = bank->drvdata;
343 void __iomem *reg;
344 int trigger;
345 u8 shift;
346 u32 val;
347
348 trigger = s3c64xx_irq_get_trigger(type);
349 if (trigger < 0) {
350 pr_err("unsupported external interrupt type\n");
351 return -EINVAL;
352 }
353
354 s3c64xx_irq_set_handler(irqd, type);
355
356 /* Set up interrupt trigger */
357 reg = d->virt_base + EINTCON_REG(bank->eint_offset);
358 shift = EINT_OFFS(bank->eint_offset) + irqd->hwirq;
359 shift = 4 * (shift / 4); /* 4 EINTs per trigger selector */
360
361 val = readl(reg);
362 val &= ~(EINT_CON_MASK << shift);
363 val |= trigger << shift;
364 writel(val, reg);
365
366 s3c64xx_irq_set_function(d, bank, irqd->hwirq);
367
368 return 0;
369 }
370
371 /*
372 * irq_chip for gpio interrupts.
373 */
374 static struct irq_chip s3c64xx_gpio_irq_chip = {
375 .name = "GPIO",
376 .irq_unmask = s3c64xx_gpio_irq_unmask,
377 .irq_mask = s3c64xx_gpio_irq_mask,
378 .irq_ack = s3c64xx_gpio_irq_ack,
379 .irq_set_type = s3c64xx_gpio_irq_set_type,
380 };
381
382 static int s3c64xx_gpio_irq_map(struct irq_domain *h, unsigned int virq,
383 irq_hw_number_t hw)
384 {
385 struct samsung_pin_bank *bank = h->host_data;
386
387 if (!(bank->eint_mask & (1 << hw)))
388 return -EINVAL;
389
390 irq_set_chip_and_handler(virq,
391 &s3c64xx_gpio_irq_chip, handle_level_irq);
392 irq_set_chip_data(virq, bank);
393
394 return 0;
395 }
396
397 /*
398 * irq domain callbacks for external gpio interrupt controller.
399 */
400 static const struct irq_domain_ops s3c64xx_gpio_irqd_ops = {
401 .map = s3c64xx_gpio_irq_map,
402 .xlate = irq_domain_xlate_twocell,
403 };
404
405 static void s3c64xx_eint_gpio_irq(struct irq_desc *desc)
406 {
407 struct irq_chip *chip = irq_desc_get_chip(desc);
408 struct s3c64xx_eint_gpio_data *data = irq_desc_get_handler_data(desc);
409 struct samsung_pinctrl_drv_data *drvdata = data->drvdata;
410
411 chained_irq_enter(chip, desc);
412
413 do {
414 unsigned int svc;
415 unsigned int group;
416 unsigned int pin;
417 unsigned int virq;
418
419 svc = readl(drvdata->virt_base + SERVICE_REG);
420 group = SVC_GROUP(svc);
421 pin = svc & SVC_NUM_MASK;
422
423 if (!group)
424 break;
425
426 /* Group 1 is used for two pin banks */
427 if (group == 1) {
428 if (pin < 8)
429 group = 0;
430 else
431 pin -= 8;
432 }
433
434 virq = irq_linear_revmap(data->domains[group], pin);
435 /*
436 * Something must be really wrong if an unmapped EINT
437 * was unmasked...
438 */
439 BUG_ON(!virq);
440
441 generic_handle_irq(virq);
442 } while (1);
443
444 chained_irq_exit(chip, desc);
445 }
446
447 /**
448 * s3c64xx_eint_gpio_init() - setup handling of external gpio interrupts.
449 * @d: driver data of samsung pinctrl driver.
450 */
451 static int s3c64xx_eint_gpio_init(struct samsung_pinctrl_drv_data *d)
452 {
453 struct s3c64xx_eint_gpio_data *data;
454 struct samsung_pin_bank *bank;
455 struct device *dev = d->dev;
456 unsigned int nr_domains;
457 unsigned int i;
458
459 if (!d->irq) {
460 dev_err(dev, "irq number not available\n");
461 return -EINVAL;
462 }
463
464 nr_domains = 0;
465 bank = d->pin_banks;
466 for (i = 0; i < d->nr_banks; ++i, ++bank) {
467 unsigned int nr_eints;
468 unsigned int mask;
469
470 if (bank->eint_type != EINT_TYPE_GPIO)
471 continue;
472
473 mask = bank->eint_mask;
474 nr_eints = fls(mask);
475
476 bank->irq_domain = irq_domain_add_linear(bank->of_node,
477 nr_eints, &s3c64xx_gpio_irqd_ops, bank);
478 if (!bank->irq_domain) {
479 dev_err(dev, "gpio irq domain add failed\n");
480 return -ENXIO;
481 }
482
483 ++nr_domains;
484 }
485
486 data = devm_kzalloc(dev, struct_size(data, domains, nr_domains),
487 GFP_KERNEL);
488 if (!data)
489 return -ENOMEM;
490 data->drvdata = d;
491
492 bank = d->pin_banks;
493 nr_domains = 0;
494 for (i = 0; i < d->nr_banks; ++i, ++bank) {
495 if (bank->eint_type != EINT_TYPE_GPIO)
496 continue;
497
498 data->domains[nr_domains++] = bank->irq_domain;
499 }
500
501 irq_set_chained_handler_and_data(d->irq, s3c64xx_eint_gpio_irq, data);
502
503 return 0;
504 }
505
506 /*
507 * Functions for configuration of EINT0 wake-up interrupts
508 */
509
510 static inline void s3c64xx_eint0_irq_set_mask(struct irq_data *irqd, bool mask)
511 {
512 struct s3c64xx_eint0_domain_data *ddata =
513 irq_data_get_irq_chip_data(irqd);
514 struct samsung_pinctrl_drv_data *d = ddata->bank->drvdata;
515 u32 val;
516
517 val = readl(d->virt_base + EINT0MASK_REG);
518 if (mask)
519 val |= 1 << ddata->eints[irqd->hwirq];
520 else
521 val &= ~(1 << ddata->eints[irqd->hwirq]);
522 writel(val, d->virt_base + EINT0MASK_REG);
523 }
524
525 static void s3c64xx_eint0_irq_unmask(struct irq_data *irqd)
526 {
527 s3c64xx_eint0_irq_set_mask(irqd, false);
528 }
529
530 static void s3c64xx_eint0_irq_mask(struct irq_data *irqd)
531 {
532 s3c64xx_eint0_irq_set_mask(irqd, true);
533 }
534
535 static void s3c64xx_eint0_irq_ack(struct irq_data *irqd)
536 {
537 struct s3c64xx_eint0_domain_data *ddata =
538 irq_data_get_irq_chip_data(irqd);
539 struct samsung_pinctrl_drv_data *d = ddata->bank->drvdata;
540
541 writel(1 << ddata->eints[irqd->hwirq],
542 d->virt_base + EINT0PEND_REG);
543 }
544
545 static int s3c64xx_eint0_irq_set_type(struct irq_data *irqd, unsigned int type)
546 {
547 struct s3c64xx_eint0_domain_data *ddata =
548 irq_data_get_irq_chip_data(irqd);
549 struct samsung_pin_bank *bank = ddata->bank;
550 struct samsung_pinctrl_drv_data *d = bank->drvdata;
551 void __iomem *reg;
552 int trigger;
553 u8 shift;
554 u32 val;
555
556 trigger = s3c64xx_irq_get_trigger(type);
557 if (trigger < 0) {
558 pr_err("unsupported external interrupt type\n");
559 return -EINVAL;
560 }
561
562 s3c64xx_irq_set_handler(irqd, type);
563
564 /* Set up interrupt trigger */
565 reg = d->virt_base + EINT0CON0_REG;
566 shift = ddata->eints[irqd->hwirq];
567 if (shift >= EINT_MAX_PER_REG) {
568 reg += 4;
569 shift -= EINT_MAX_PER_REG;
570 }
571 shift = EINT_CON_LEN * (shift / 2);
572
573 val = readl(reg);
574 val &= ~(EINT_CON_MASK << shift);
575 val |= trigger << shift;
576 writel(val, reg);
577
578 s3c64xx_irq_set_function(d, bank, irqd->hwirq);
579
580 return 0;
581 }
582
583 /*
584 * irq_chip for wakeup interrupts
585 */
586 static struct irq_chip s3c64xx_eint0_irq_chip = {
587 .name = "EINT0",
588 .irq_unmask = s3c64xx_eint0_irq_unmask,
589 .irq_mask = s3c64xx_eint0_irq_mask,
590 .irq_ack = s3c64xx_eint0_irq_ack,
591 .irq_set_type = s3c64xx_eint0_irq_set_type,
592 };
593
594 static inline void s3c64xx_irq_demux_eint(struct irq_desc *desc, u32 range)
595 {
596 struct irq_chip *chip = irq_desc_get_chip(desc);
597 struct s3c64xx_eint0_data *data = irq_desc_get_handler_data(desc);
598 struct samsung_pinctrl_drv_data *drvdata = data->drvdata;
599 unsigned int pend, mask;
600
601 chained_irq_enter(chip, desc);
602
603 pend = readl(drvdata->virt_base + EINT0PEND_REG);
604 mask = readl(drvdata->virt_base + EINT0MASK_REG);
605
606 pend = pend & range & ~mask;
607 pend &= range;
608
609 while (pend) {
610 unsigned int virq, irq;
611
612 irq = fls(pend) - 1;
613 pend &= ~(1 << irq);
614 virq = irq_linear_revmap(data->domains[irq], data->pins[irq]);
615 /*
616 * Something must be really wrong if an unmapped EINT
617 * was unmasked...
618 */
619 BUG_ON(!virq);
620
621 generic_handle_irq(virq);
622 }
623
624 chained_irq_exit(chip, desc);
625 }
626
627 static void s3c64xx_demux_eint0_3(struct irq_desc *desc)
628 {
629 s3c64xx_irq_demux_eint(desc, 0xf);
630 }
631
632 static void s3c64xx_demux_eint4_11(struct irq_desc *desc)
633 {
634 s3c64xx_irq_demux_eint(desc, 0xff0);
635 }
636
637 static void s3c64xx_demux_eint12_19(struct irq_desc *desc)
638 {
639 s3c64xx_irq_demux_eint(desc, 0xff000);
640 }
641
642 static void s3c64xx_demux_eint20_27(struct irq_desc *desc)
643 {
644 s3c64xx_irq_demux_eint(desc, 0xff00000);
645 }
646
647 static irq_flow_handler_t s3c64xx_eint0_handlers[NUM_EINT0_IRQ] = {
648 s3c64xx_demux_eint0_3,
649 s3c64xx_demux_eint4_11,
650 s3c64xx_demux_eint12_19,
651 s3c64xx_demux_eint20_27,
652 };
653
654 static int s3c64xx_eint0_irq_map(struct irq_domain *h, unsigned int virq,
655 irq_hw_number_t hw)
656 {
657 struct s3c64xx_eint0_domain_data *ddata = h->host_data;
658 struct samsung_pin_bank *bank = ddata->bank;
659
660 if (!(bank->eint_mask & (1 << hw)))
661 return -EINVAL;
662
663 irq_set_chip_and_handler(virq,
664 &s3c64xx_eint0_irq_chip, handle_level_irq);
665 irq_set_chip_data(virq, ddata);
666
667 return 0;
668 }
669
670 /*
671 * irq domain callbacks for external wakeup interrupt controller.
672 */
673 static const struct irq_domain_ops s3c64xx_eint0_irqd_ops = {
674 .map = s3c64xx_eint0_irq_map,
675 .xlate = irq_domain_xlate_twocell,
676 };
677
678 /* list of external wakeup controllers supported */
679 static const struct of_device_id s3c64xx_eint0_irq_ids[] = {
680 { .compatible = "samsung,s3c64xx-wakeup-eint", },
681 { }
682 };
683
684 /**
685 * s3c64xx_eint_eint0_init() - setup handling of external wakeup interrupts.
686 * @d: driver data of samsung pinctrl driver.
687 */
688 static int s3c64xx_eint_eint0_init(struct samsung_pinctrl_drv_data *d)
689 {
690 struct device *dev = d->dev;
691 struct device_node *eint0_np = NULL;
692 struct device_node *np;
693 struct samsung_pin_bank *bank;
694 struct s3c64xx_eint0_data *data;
695 unsigned int i;
696
697 for_each_child_of_node(dev->of_node, np) {
698 if (of_match_node(s3c64xx_eint0_irq_ids, np)) {
699 eint0_np = np;
700 break;
701 }
702 }
703 if (!eint0_np)
704 return -ENODEV;
705
706 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
707 if (!data) {
708 of_node_put(eint0_np);
709 return -ENOMEM;
710 }
711 data->drvdata = d;
712
713 for (i = 0; i < NUM_EINT0_IRQ; ++i) {
714 unsigned int irq;
715
716 irq = irq_of_parse_and_map(eint0_np, i);
717 if (!irq) {
718 dev_err(dev, "failed to get wakeup EINT IRQ %d\n", i);
719 of_node_put(eint0_np);
720 return -ENXIO;
721 }
722
723 irq_set_chained_handler_and_data(irq,
724 s3c64xx_eint0_handlers[i],
725 data);
726 }
727 of_node_put(eint0_np);
728
729 bank = d->pin_banks;
730 for (i = 0; i < d->nr_banks; ++i, ++bank) {
731 struct s3c64xx_eint0_domain_data *ddata;
732 unsigned int nr_eints;
733 unsigned int mask;
734 unsigned int irq;
735 unsigned int pin;
736
737 if (bank->eint_type != EINT_TYPE_WKUP)
738 continue;
739
740 mask = bank->eint_mask;
741 nr_eints = fls(mask);
742
743 ddata = devm_kzalloc(dev,
744 sizeof(*ddata) + nr_eints, GFP_KERNEL);
745 if (!ddata)
746 return -ENOMEM;
747 ddata->bank = bank;
748
749 bank->irq_domain = irq_domain_add_linear(bank->of_node,
750 nr_eints, &s3c64xx_eint0_irqd_ops, ddata);
751 if (!bank->irq_domain) {
752 dev_err(dev, "wkup irq domain add failed\n");
753 return -ENXIO;
754 }
755
756 irq = bank->eint_offset;
757 mask = bank->eint_mask;
758 for (pin = 0; mask; ++pin, mask >>= 1) {
759 if (!(mask & 1))
760 continue;
761 data->domains[irq] = bank->irq_domain;
762 data->pins[irq] = pin;
763 ddata->eints[pin] = irq;
764 ++irq;
765 }
766 }
767
768 return 0;
769 }
770
771 /* pin banks of s3c64xx pin-controller 0 */
772 static const struct samsung_pin_bank_data s3c64xx_pin_banks0[] __initconst = {
773 PIN_BANK_4BIT_EINTG(8, 0x000, "gpa", 0),
774 PIN_BANK_4BIT_EINTG(7, 0x020, "gpb", 8),
775 PIN_BANK_4BIT_EINTG(8, 0x040, "gpc", 16),
776 PIN_BANK_4BIT_EINTG(5, 0x060, "gpd", 32),
777 PIN_BANK_4BIT(5, 0x080, "gpe"),
778 PIN_BANK_2BIT_EINTG(16, 0x0a0, "gpf", 48, 0x3fff),
779 PIN_BANK_4BIT_EINTG(7, 0x0c0, "gpg", 64),
780 PIN_BANK_4BIT2_EINTG(10, 0x0e0, "gph", 80),
781 PIN_BANK_2BIT(16, 0x100, "gpi"),
782 PIN_BANK_2BIT(12, 0x120, "gpj"),
783 PIN_BANK_4BIT2_ALIVE(16, 0x800, "gpk"),
784 PIN_BANK_4BIT2_EINTW(15, 0x810, "gpl", 16, 0x7f00),
785 PIN_BANK_4BIT_EINTW(6, 0x820, "gpm", 23, 0x1f),
786 PIN_BANK_2BIT_EINTW(16, 0x830, "gpn", 0),
787 PIN_BANK_2BIT_EINTG(16, 0x140, "gpo", 96, 0xffff),
788 PIN_BANK_2BIT_EINTG(15, 0x160, "gpp", 112, 0x7fff),
789 PIN_BANK_2BIT_EINTG(9, 0x180, "gpq", 128, 0x1ff),
790 };
791
792 /*
793 * Samsung pinctrl driver data for S3C64xx SoC. S3C64xx SoC includes
794 * one gpio/pin-mux/pinconfig controller.
795 */
796 static const struct samsung_pin_ctrl s3c64xx_pin_ctrl[] __initconst = {
797 {
798 /* pin-controller instance 1 data */
799 .pin_banks = s3c64xx_pin_banks0,
800 .nr_banks = ARRAY_SIZE(s3c64xx_pin_banks0),
801 .eint_gpio_init = s3c64xx_eint_gpio_init,
802 .eint_wkup_init = s3c64xx_eint_eint0_init,
803 },
804 };
805
806 const struct samsung_pinctrl_of_match_data s3c64xx_of_data __initconst = {
807 .ctrl = s3c64xx_pin_ctrl,
808 .num_ctrl = ARRAY_SIZE(s3c64xx_pin_ctrl),
809 };
Linux with added FPC-III support