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powerpc/kprobes: Remove kretprobe_trampoline_holder.
[linux/fpc-iii.git] / drivers / pinctrl / mediatek / pinctrl-mtk-common.c
bloba607655d78309c23c1b1373103f93f307311248f
1 /*
2 * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver.
3 * Copyright (c) 2014 MediaTek Inc.
4 * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16 #include <linux/io.h>
17 #include <linux/gpio/driver.h>
18 #include <linux/module.h>
19 #include <linux/of.h>
20 #include <linux/of_address.h>
21 #include <linux/of_device.h>
22 #include <linux/of_irq.h>
23 #include <linux/pinctrl/consumer.h>
24 #include <linux/pinctrl/machine.h>
25 #include <linux/pinctrl/pinconf.h>
26 #include <linux/pinctrl/pinconf-generic.h>
27 #include <linux/pinctrl/pinctrl.h>
28 #include <linux/pinctrl/pinmux.h>
29 #include <linux/platform_device.h>
30 #include <linux/slab.h>
31 #include <linux/bitops.h>
32 #include <linux/regmap.h>
33 #include <linux/mfd/syscon.h>
34 #include <linux/delay.h>
35 #include <linux/interrupt.h>
36 #include <linux/pm.h>
37 #include <dt-bindings/pinctrl/mt65xx.h>
38
39 #include "../core.h"
40 #include "../pinconf.h"
41 #include "../pinctrl-utils.h"
42 #include "pinctrl-mtk-common.h"
43
44 #define MAX_GPIO_MODE_PER_REG 5
45 #define GPIO_MODE_BITS 3
46 #define GPIO_MODE_PREFIX "GPIO"
47
48 static const char * const mtk_gpio_functions[] = {
49 "func0", "func1", "func2", "func3",
50 "func4", "func5", "func6", "func7",
51 "func8", "func9", "func10", "func11",
52 "func12", "func13", "func14", "func15",
53 };
54
55 /*
56 * There are two base address for pull related configuration
57 * in mt8135, and different GPIO pins use different base address.
58 * When pin number greater than type1_start and less than type1_end,
59 * should use the second base address.
60 */
61 static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl,
62 unsigned long pin)
63 {
64 if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end)
65 return pctl->regmap2;
66 return pctl->regmap1;
67 }
68
69 static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin)
70 {
71 /* Different SoC has different mask and port shift. */
72 return ((pin >> 4) & pctl->devdata->port_mask)
73 << pctl->devdata->port_shf;
74 }
75
76 static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
77 struct pinctrl_gpio_range *range, unsigned offset,
78 bool input)
79 {
80 unsigned int reg_addr;
81 unsigned int bit;
82 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
83
84 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
85 bit = BIT(offset & 0xf);
86
87 if (pctl->devdata->spec_dir_set)
88 pctl->devdata->spec_dir_set(&reg_addr, offset);
89
90 if (input)
91 /* Different SoC has different alignment offset. */
92 reg_addr = CLR_ADDR(reg_addr, pctl);
93 else
94 reg_addr = SET_ADDR(reg_addr, pctl);
95
96 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
97 return 0;
98 }
99
100 static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
101 {
102 unsigned int reg_addr;
103 unsigned int bit;
104 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
105
106 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset;
107 bit = BIT(offset & 0xf);
108
109 if (value)
110 reg_addr = SET_ADDR(reg_addr, pctl);
111 else
112 reg_addr = CLR_ADDR(reg_addr, pctl);
113
114 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
115 }
116
117 static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin,
118 int value, enum pin_config_param arg)
119 {
120 unsigned int reg_addr, offset;
121 unsigned int bit;
122
123 /**
124 * Due to some soc are not support ies/smt config, add this special
125 * control to handle it.
126 */
127 if (!pctl->devdata->spec_ies_smt_set &&
128 pctl->devdata->ies_offset == MTK_PINCTRL_NOT_SUPPORT &&
129 arg == PIN_CONFIG_INPUT_ENABLE)
130 return -EINVAL;
131
132 if (!pctl->devdata->spec_ies_smt_set &&
133 pctl->devdata->smt_offset == MTK_PINCTRL_NOT_SUPPORT &&
134 arg == PIN_CONFIG_INPUT_SCHMITT_ENABLE)
135 return -EINVAL;
136
137 /*
138 * Due to some pins are irregular, their input enable and smt
139 * control register are discontinuous, so we need this special handle.
140 */
141 if (pctl->devdata->spec_ies_smt_set) {
142 return pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin),
143 pin, pctl->devdata->port_align, value, arg);
144 }
145
146 bit = BIT(pin & 0xf);
147
148 if (arg == PIN_CONFIG_INPUT_ENABLE)
149 offset = pctl->devdata->ies_offset;
150 else
151 offset = pctl->devdata->smt_offset;
152
153 if (value)
154 reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
155 else
156 reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
157
158 regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit);
159 return 0;
160 }
161
162 int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap,
163 const struct mtk_pin_ies_smt_set *ies_smt_infos, unsigned int info_num,
164 unsigned int pin, unsigned char align, int value)
165 {
166 unsigned int i, reg_addr, bit;
167
168 for (i = 0; i < info_num; i++) {
169 if (pin >= ies_smt_infos[i].start &&
170 pin <= ies_smt_infos[i].end) {
171 break;
172 }
173 }
174
175 if (i == info_num)
176 return -EINVAL;
177
178 if (value)
179 reg_addr = ies_smt_infos[i].offset + align;
180 else
181 reg_addr = ies_smt_infos[i].offset + (align << 1);
182
183 bit = BIT(ies_smt_infos[i].bit);
184 regmap_write(regmap, reg_addr, bit);
185 return 0;
186 }
187
188 static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin(
189 struct mtk_pinctrl *pctl, unsigned long pin) {
190 int i;
191
192 for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) {
193 const struct mtk_pin_drv_grp *pin_drv =
194 pctl->devdata->pin_drv_grp + i;
195 if (pin == pin_drv->pin)
196 return pin_drv;
197 }
198
199 return NULL;
200 }
201
202 static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl,
203 unsigned int pin, unsigned char driving)
204 {
205 const struct mtk_pin_drv_grp *pin_drv;
206 unsigned int val;
207 unsigned int bits, mask, shift;
208 const struct mtk_drv_group_desc *drv_grp;
209
210 if (pin >= pctl->devdata->npins)
211 return -EINVAL;
212
213 pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin);
214 if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls)
215 return -EINVAL;
216
217 drv_grp = pctl->devdata->grp_desc + pin_drv->grp;
218 if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv
219 && !(driving % drv_grp->step)) {
220 val = driving / drv_grp->step - 1;
221 bits = drv_grp->high_bit - drv_grp->low_bit + 1;
222 mask = BIT(bits) - 1;
223 shift = pin_drv->bit + drv_grp->low_bit;
224 mask <<= shift;
225 val <<= shift;
226 return regmap_update_bits(mtk_get_regmap(pctl, pin),
227 pin_drv->offset, mask, val);
228 }
229
230 return -EINVAL;
231 }
232
233 int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap,
234 const struct mtk_pin_spec_pupd_set_samereg *pupd_infos,
235 unsigned int info_num, unsigned int pin,
236 unsigned char align, bool isup, unsigned int r1r0)
237 {
238 unsigned int i;
239 unsigned int reg_pupd, reg_set, reg_rst;
240 unsigned int bit_pupd, bit_r0, bit_r1;
241 const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin;
242 bool find = false;
243
244 for (i = 0; i < info_num; i++) {
245 if (pin == pupd_infos[i].pin) {
246 find = true;
247 break;
248 }
249 }
250
251 if (!find)
252 return -EINVAL;
253
254 spec_pupd_pin = pupd_infos + i;
255 reg_set = spec_pupd_pin->offset + align;
256 reg_rst = spec_pupd_pin->offset + (align << 1);
257
258 if (isup)
259 reg_pupd = reg_rst;
260 else
261 reg_pupd = reg_set;
262
263 bit_pupd = BIT(spec_pupd_pin->pupd_bit);
264 regmap_write(regmap, reg_pupd, bit_pupd);
265
266 bit_r0 = BIT(spec_pupd_pin->r0_bit);
267 bit_r1 = BIT(spec_pupd_pin->r1_bit);
268
269 switch (r1r0) {
270 case MTK_PUPD_SET_R1R0_00:
271 regmap_write(regmap, reg_rst, bit_r0);
272 regmap_write(regmap, reg_rst, bit_r1);
273 break;
274 case MTK_PUPD_SET_R1R0_01:
275 regmap_write(regmap, reg_set, bit_r0);
276 regmap_write(regmap, reg_rst, bit_r1);
277 break;
278 case MTK_PUPD_SET_R1R0_10:
279 regmap_write(regmap, reg_rst, bit_r0);
280 regmap_write(regmap, reg_set, bit_r1);
281 break;
282 case MTK_PUPD_SET_R1R0_11:
283 regmap_write(regmap, reg_set, bit_r0);
284 regmap_write(regmap, reg_set, bit_r1);
285 break;
286 default:
287 return -EINVAL;
288 }
289
290 return 0;
291 }
292
293 static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
294 unsigned int pin, bool enable, bool isup, unsigned int arg)
295 {
296 unsigned int bit;
297 unsigned int reg_pullen, reg_pullsel;
298 int ret;
299
300 /* Some pins' pull setting are very different,
301 * they have separate pull up/down bit, R0 and R1
302 * resistor bit, so we need this special handle.
303 */
304 if (pctl->devdata->spec_pull_set) {
305 ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
306 pin, pctl->devdata->port_align, isup, arg);
307 if (!ret)
308 return 0;
309 }
310
311 /* For generic pull config, default arg value should be 0 or 1. */
312 if (arg != 0 && arg != 1) {
313 dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n",
314 arg, pin);
315 return -EINVAL;
316 }
317
318 bit = BIT(pin & 0xf);
319 if (enable)
320 reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) +
321 pctl->devdata->pullen_offset, pctl);
322 else
323 reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) +
324 pctl->devdata->pullen_offset, pctl);
325
326 if (isup)
327 reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) +
328 pctl->devdata->pullsel_offset, pctl);
329 else
330 reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) +
331 pctl->devdata->pullsel_offset, pctl);
332
333 regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit);
334 regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit);
335 return 0;
336 }
337
338 static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
339 unsigned int pin, enum pin_config_param param,
340 enum pin_config_param arg)
341 {
342 int ret = 0;
343 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
344
345 switch (param) {
346 case PIN_CONFIG_BIAS_DISABLE:
347 ret = mtk_pconf_set_pull_select(pctl, pin, false, false, arg);
348 break;
349 case PIN_CONFIG_BIAS_PULL_UP:
350 ret = mtk_pconf_set_pull_select(pctl, pin, true, true, arg);
351 break;
352 case PIN_CONFIG_BIAS_PULL_DOWN:
353 ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg);
354 break;
355 case PIN_CONFIG_INPUT_ENABLE:
356 mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
357 ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
358 break;
359 case PIN_CONFIG_OUTPUT:
360 mtk_gpio_set(pctl->chip, pin, arg);
361 ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false);
362 break;
363 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
364 mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
365 ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
366 break;
367 case PIN_CONFIG_DRIVE_STRENGTH:
368 ret = mtk_pconf_set_driving(pctl, pin, arg);
369 break;
370 default:
371 ret = -EINVAL;
372 }
373
374 return ret;
375 }
376
377 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev,
378 unsigned group,
379 unsigned long *config)
380 {
381 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
382
383 *config = pctl->groups[group].config;
384
385 return 0;
386 }
387
388 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
389 unsigned long *configs, unsigned num_configs)
390 {
391 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
392 struct mtk_pinctrl_group *g = &pctl->groups[group];
393 int i, ret;
394
395 for (i = 0; i < num_configs; i++) {
396 ret = mtk_pconf_parse_conf(pctldev, g->pin,
397 pinconf_to_config_param(configs[i]),
398 pinconf_to_config_argument(configs[i]));
399 if (ret < 0)
400 return ret;
401
402 g->config = configs[i];
403 }
404
405 return 0;
406 }
407
408 static const struct pinconf_ops mtk_pconf_ops = {
409 .pin_config_group_get = mtk_pconf_group_get,
410 .pin_config_group_set = mtk_pconf_group_set,
411 };
412
413 static struct mtk_pinctrl_group *
414 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin)
415 {
416 int i;
417
418 for (i = 0; i < pctl->ngroups; i++) {
419 struct mtk_pinctrl_group *grp = pctl->groups + i;
420
421 if (grp->pin == pin)
422 return grp;
423 }
424
425 return NULL;
426 }
427
428 static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin(
429 struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum)
430 {
431 const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num;
432 const struct mtk_desc_function *func = pin->functions;
433
434 while (func && func->name) {
435 if (func->muxval == fnum)
436 return func;
437 func++;
438 }
439
440 return NULL;
441 }
442
443 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl,
444 u32 pin_num, u32 fnum)
445 {
446 int i;
447
448 for (i = 0; i < pctl->devdata->npins; i++) {
449 const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
450
451 if (pin->pin.number == pin_num) {
452 const struct mtk_desc_function *func =
453 pin->functions;
454
455 while (func && func->name) {
456 if (func->muxval == fnum)
457 return true;
458 func++;
459 }
460
461 break;
462 }
463 }
464
465 return false;
466 }
467
468 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
469 u32 pin, u32 fnum, struct mtk_pinctrl_group *grp,
470 struct pinctrl_map **map, unsigned *reserved_maps,
471 unsigned *num_maps)
472 {
473 bool ret;
474
475 if (*num_maps == *reserved_maps)
476 return -ENOSPC;
477
478 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
479 (*map)[*num_maps].data.mux.group = grp->name;
480
481 ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
482 if (!ret) {
483 dev_err(pctl->dev, "invalid function %d on pin %d .\n",
484 fnum, pin);
485 return -EINVAL;
486 }
487
488 (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
489 (*num_maps)++;
490
491 return 0;
492 }
493
494 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
495 struct device_node *node,
496 struct pinctrl_map **map,
497 unsigned *reserved_maps,
498 unsigned *num_maps)
499 {
500 struct property *pins;
501 u32 pinfunc, pin, func;
502 int num_pins, num_funcs, maps_per_pin;
503 unsigned long *configs;
504 unsigned int num_configs;
505 bool has_config = 0;
506 int i, err;
507 unsigned reserve = 0;
508 struct mtk_pinctrl_group *grp;
509 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
510
511 pins = of_find_property(node, "pinmux", NULL);
512 if (!pins) {
513 dev_err(pctl->dev, "missing pins property in node %s .\n",
514 node->name);
515 return -EINVAL;
516 }
517
518 err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
519 &num_configs);
520 if (err)
521 return err;
522
523 if (num_configs)
524 has_config = 1;
525
526 num_pins = pins->length / sizeof(u32);
527 num_funcs = num_pins;
528 maps_per_pin = 0;
529 if (num_funcs)
530 maps_per_pin++;
531 if (has_config && num_pins >= 1)
532 maps_per_pin++;
533
534 if (!num_pins || !maps_per_pin) {
535 err = -EINVAL;
536 goto exit;
537 }
538
539 reserve = num_pins * maps_per_pin;
540
541 err = pinctrl_utils_reserve_map(pctldev, map,
542 reserved_maps, num_maps, reserve);
543 if (err < 0)
544 goto exit;
545
546 for (i = 0; i < num_pins; i++) {
547 err = of_property_read_u32_index(node, "pinmux",
548 i, &pinfunc);
549 if (err)
550 goto exit;
551
552 pin = MTK_GET_PIN_NO(pinfunc);
553 func = MTK_GET_PIN_FUNC(pinfunc);
554
555 if (pin >= pctl->devdata->npins ||
556 func >= ARRAY_SIZE(mtk_gpio_functions)) {
557 dev_err(pctl->dev, "invalid pins value.\n");
558 err = -EINVAL;
559 goto exit;
560 }
561
562 grp = mtk_pctrl_find_group_by_pin(pctl, pin);
563 if (!grp) {
564 dev_err(pctl->dev, "unable to match pin %d to group\n",
565 pin);
566 err = -EINVAL;
567 goto exit;
568 }
569
570 err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
571 reserved_maps, num_maps);
572 if (err < 0)
573 goto exit;
574
575 if (has_config) {
576 err = pinctrl_utils_add_map_configs(pctldev, map,
577 reserved_maps, num_maps, grp->name,
578 configs, num_configs,
579 PIN_MAP_TYPE_CONFIGS_GROUP);
580 if (err < 0)
581 goto exit;
582 }
583 }
584
585 err = 0;
586
587 exit:
588 kfree(configs);
589 return err;
590 }
591
592 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
593 struct device_node *np_config,
594 struct pinctrl_map **map, unsigned *num_maps)
595 {
596 struct device_node *np;
597 unsigned reserved_maps;
598 int ret;
599
600 *map = NULL;
601 *num_maps = 0;
602 reserved_maps = 0;
603
604 for_each_child_of_node(np_config, np) {
605 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
606 &reserved_maps, num_maps);
607 if (ret < 0) {
608 pinctrl_utils_free_map(pctldev, *map, *num_maps);
609 of_node_put(np);
610 return ret;
611 }
612 }
613
614 return 0;
615 }
616
617 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
618 {
619 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
620
621 return pctl->ngroups;
622 }
623
624 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
625 unsigned group)
626 {
627 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
628
629 return pctl->groups[group].name;
630 }
631
632 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
633 unsigned group,
634 const unsigned **pins,
635 unsigned *num_pins)
636 {
637 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
638
639 *pins = (unsigned *)&pctl->groups[group].pin;
640 *num_pins = 1;
641
642 return 0;
643 }
644
645 static const struct pinctrl_ops mtk_pctrl_ops = {
646 .dt_node_to_map = mtk_pctrl_dt_node_to_map,
647 .dt_free_map = pinctrl_utils_free_map,
648 .get_groups_count = mtk_pctrl_get_groups_count,
649 .get_group_name = mtk_pctrl_get_group_name,
650 .get_group_pins = mtk_pctrl_get_group_pins,
651 };
652
653 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
654 {
655 return ARRAY_SIZE(mtk_gpio_functions);
656 }
657
658 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
659 unsigned selector)
660 {
661 return mtk_gpio_functions[selector];
662 }
663
664 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
665 unsigned function,
666 const char * const **groups,
667 unsigned * const num_groups)
668 {
669 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
670
671 *groups = pctl->grp_names;
672 *num_groups = pctl->ngroups;
673
674 return 0;
675 }
676
677 static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev,
678 unsigned long pin, unsigned long mode)
679 {
680 unsigned int reg_addr;
681 unsigned char bit;
682 unsigned int val;
683 unsigned int mask = (1L << GPIO_MODE_BITS) - 1;
684 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
685
686 if (pctl->devdata->spec_pinmux_set)
687 pctl->devdata->spec_pinmux_set(mtk_get_regmap(pctl, pin),
688 pin, mode);
689
690 reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf)
691 + pctl->devdata->pinmux_offset;
692
693 mode &= mask;
694 bit = pin % MAX_GPIO_MODE_PER_REG;
695 mask <<= (GPIO_MODE_BITS * bit);
696 val = (mode << (GPIO_MODE_BITS * bit));
697 return regmap_update_bits(mtk_get_regmap(pctl, pin),
698 reg_addr, mask, val);
699 }
700
701 static const struct mtk_desc_pin *
702 mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num)
703 {
704 int i;
705 const struct mtk_desc_pin *pin;
706
707 for (i = 0; i < pctl->devdata->npins; i++) {
708 pin = pctl->devdata->pins + i;
709 if (pin->eint.eintnum == eint_num)
710 return pin;
711 }
712
713 return NULL;
714 }
715
716 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
717 unsigned function,
718 unsigned group)
719 {
720 bool ret;
721 const struct mtk_desc_function *desc;
722 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
723 struct mtk_pinctrl_group *g = pctl->groups + group;
724
725 ret = mtk_pctrl_is_function_valid(pctl, g->pin, function);
726 if (!ret) {
727 dev_err(pctl->dev, "invalid function %d on group %d .\n",
728 function, group);
729 return -EINVAL;
730 }
731
732 desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function);
733 if (!desc)
734 return -EINVAL;
735 mtk_pmx_set_mode(pctldev, g->pin, desc->muxval);
736 return 0;
737 }
738
739 static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl,
740 unsigned offset)
741 {
742 const struct mtk_desc_pin *pin = pctl->devdata->pins + offset;
743 const struct mtk_desc_function *func = pin->functions;
744
745 while (func && func->name) {
746 if (!strncmp(func->name, GPIO_MODE_PREFIX,
747 sizeof(GPIO_MODE_PREFIX)-1))
748 return func->muxval;
749 func++;
750 }
751 return -EINVAL;
752 }
753
754 static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
755 struct pinctrl_gpio_range *range,
756 unsigned offset)
757 {
758 int muxval;
759 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
760
761 muxval = mtk_pmx_find_gpio_mode(pctl, offset);
762
763 if (muxval < 0) {
764 dev_err(pctl->dev, "invalid gpio pin %d.\n", offset);
765 return -EINVAL;
766 }
767
768 mtk_pmx_set_mode(pctldev, offset, muxval);
769 mtk_pconf_set_ies_smt(pctl, offset, 1, PIN_CONFIG_INPUT_ENABLE);
770
771 return 0;
772 }
773
774 static const struct pinmux_ops mtk_pmx_ops = {
775 .get_functions_count = mtk_pmx_get_funcs_cnt,
776 .get_function_name = mtk_pmx_get_func_name,
777 .get_function_groups = mtk_pmx_get_func_groups,
778 .set_mux = mtk_pmx_set_mux,
779 .gpio_set_direction = mtk_pmx_gpio_set_direction,
780 .gpio_request_enable = mtk_pmx_gpio_request_enable,
781 };
782
783 static int mtk_gpio_direction_input(struct gpio_chip *chip,
784 unsigned offset)
785 {
786 return pinctrl_gpio_direction_input(chip->base + offset);
787 }
788
789 static int mtk_gpio_direction_output(struct gpio_chip *chip,
790 unsigned offset, int value)
791 {
792 mtk_gpio_set(chip, offset, value);
793 return pinctrl_gpio_direction_output(chip->base + offset);
794 }
795
796 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
797 {
798 unsigned int reg_addr;
799 unsigned int bit;
800 unsigned int read_val = 0;
801
802 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
803
804 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
805 bit = BIT(offset & 0xf);
806
807 if (pctl->devdata->spec_dir_set)
808 pctl->devdata->spec_dir_set(&reg_addr, offset);
809
810 regmap_read(pctl->regmap1, reg_addr, &read_val);
811 return !(read_val & bit);
812 }
813
814 static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset)
815 {
816 unsigned int reg_addr;
817 unsigned int bit;
818 unsigned int read_val = 0;
819 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
820
821 reg_addr = mtk_get_port(pctl, offset) +
822 pctl->devdata->din_offset;
823
824 bit = BIT(offset & 0xf);
825 regmap_read(pctl->regmap1, reg_addr, &read_val);
826 return !!(read_val & bit);
827 }
828
829 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
830 {
831 const struct mtk_desc_pin *pin;
832 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
833 int irq;
834
835 pin = pctl->devdata->pins + offset;
836 if (pin->eint.eintnum == NO_EINT_SUPPORT)
837 return -EINVAL;
838
839 irq = irq_find_mapping(pctl->domain, pin->eint.eintnum);
840 if (!irq)
841 return -EINVAL;
842
843 return irq;
844 }
845
846 static int mtk_pinctrl_irq_request_resources(struct irq_data *d)
847 {
848 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
849 const struct mtk_desc_pin *pin;
850 int ret;
851
852 pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
853
854 if (!pin) {
855 dev_err(pctl->dev, "Can not find pin\n");
856 return -EINVAL;
857 }
858
859 ret = gpiochip_lock_as_irq(pctl->chip, pin->pin.number);
860 if (ret) {
861 dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
862 irqd_to_hwirq(d));
863 return ret;
864 }
865
866 /* set mux to INT mode */
867 mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux);
868 /* set gpio direction to input */
869 mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, true);
870 /* set input-enable */
871 mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, PIN_CONFIG_INPUT_ENABLE);
872
873 return 0;
874 }
875
876 static void mtk_pinctrl_irq_release_resources(struct irq_data *d)
877 {
878 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
879 const struct mtk_desc_pin *pin;
880
881 pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
882
883 if (!pin) {
884 dev_err(pctl->dev, "Can not find pin\n");
885 return;
886 }
887
888 gpiochip_unlock_as_irq(pctl->chip, pin->pin.number);
889 }
890
891 static void __iomem *mtk_eint_get_offset(struct mtk_pinctrl *pctl,
892 unsigned int eint_num, unsigned int offset)
893 {
894 unsigned int eint_base = 0;
895 void __iomem *reg;
896
897 if (eint_num >= pctl->devdata->ap_num)
898 eint_base = pctl->devdata->ap_num;
899
900 reg = pctl->eint_reg_base + offset + ((eint_num - eint_base) / 32) * 4;
901
902 return reg;
903 }
904
905 /*
906 * mtk_can_en_debounce: Check the EINT number is able to enable debounce or not
907 * @eint_num: the EINT number to setmtk_pinctrl
908 */
909 static unsigned int mtk_eint_can_en_debounce(struct mtk_pinctrl *pctl,
910 unsigned int eint_num)
911 {
912 unsigned int sens;
913 unsigned int bit = BIT(eint_num % 32);
914 const struct mtk_eint_offsets *eint_offsets =
915 &pctl->devdata->eint_offsets;
916
917 void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
918 eint_offsets->sens);
919
920 if (readl(reg) & bit)
921 sens = MT_LEVEL_SENSITIVE;
922 else
923 sens = MT_EDGE_SENSITIVE;
924
925 if ((eint_num < pctl->devdata->db_cnt) && (sens != MT_EDGE_SENSITIVE))
926 return 1;
927 else
928 return 0;
929 }
930
931 /*
932 * mtk_eint_get_mask: To get the eint mask
933 * @eint_num: the EINT number to get
934 */
935 static unsigned int mtk_eint_get_mask(struct mtk_pinctrl *pctl,
936 unsigned int eint_num)
937 {
938 unsigned int bit = BIT(eint_num % 32);
939 const struct mtk_eint_offsets *eint_offsets =
940 &pctl->devdata->eint_offsets;
941
942 void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
943 eint_offsets->mask);
944
945 return !!(readl(reg) & bit);
946 }
947
948 static int mtk_eint_flip_edge(struct mtk_pinctrl *pctl, int hwirq)
949 {
950 int start_level, curr_level;
951 unsigned int reg_offset;
952 const struct mtk_eint_offsets *eint_offsets = &(pctl->devdata->eint_offsets);
953 u32 mask = BIT(hwirq & 0x1f);
954 u32 port = (hwirq >> 5) & eint_offsets->port_mask;
955 void __iomem *reg = pctl->eint_reg_base + (port << 2);
956 const struct mtk_desc_pin *pin;
957
958 pin = mtk_find_pin_by_eint_num(pctl, hwirq);
959 curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
960 do {
961 start_level = curr_level;
962 if (start_level)
963 reg_offset = eint_offsets->pol_clr;
964 else
965 reg_offset = eint_offsets->pol_set;
966 writel(mask, reg + reg_offset);
967
968 curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
969 } while (start_level != curr_level);
970
971 return start_level;
972 }
973
974 static void mtk_eint_mask(struct irq_data *d)
975 {
976 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
977 const struct mtk_eint_offsets *eint_offsets =
978 &pctl->devdata->eint_offsets;
979 u32 mask = BIT(d->hwirq & 0x1f);
980 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
981 eint_offsets->mask_set);
982
983 writel(mask, reg);
984 }
985
986 static void mtk_eint_unmask(struct irq_data *d)
987 {
988 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
989 const struct mtk_eint_offsets *eint_offsets =
990 &pctl->devdata->eint_offsets;
991 u32 mask = BIT(d->hwirq & 0x1f);
992 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
993 eint_offsets->mask_clr);
994
995 writel(mask, reg);
996
997 if (pctl->eint_dual_edges[d->hwirq])
998 mtk_eint_flip_edge(pctl, d->hwirq);
999 }
1000
1001 static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
1002 unsigned debounce)
1003 {
1004 struct mtk_pinctrl *pctl = dev_get_drvdata(chip->parent);
1005 int eint_num, virq, eint_offset;
1006 unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc;
1007 static const unsigned int debounce_time[] = {500, 1000, 16000, 32000, 64000,
1008 128000, 256000};
1009 const struct mtk_desc_pin *pin;
1010 struct irq_data *d;
1011
1012 pin = pctl->devdata->pins + offset;
1013 if (pin->eint.eintnum == NO_EINT_SUPPORT)
1014 return -EINVAL;
1015
1016 eint_num = pin->eint.eintnum;
1017 virq = irq_find_mapping(pctl->domain, eint_num);
1018 eint_offset = (eint_num % 4) * 8;
1019 d = irq_get_irq_data(virq);
1020
1021 set_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_set;
1022 clr_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_clr;
1023 if (!mtk_eint_can_en_debounce(pctl, eint_num))
1024 return -ENOSYS;
1025
1026 dbnc = ARRAY_SIZE(debounce_time);
1027 for (i = 0; i < ARRAY_SIZE(debounce_time); i++) {
1028 if (debounce <= debounce_time[i]) {
1029 dbnc = i;
1030 break;
1031 }
1032 }
1033
1034 if (!mtk_eint_get_mask(pctl, eint_num)) {
1035 mtk_eint_mask(d);
1036 unmask = 1;
1037 } else {
1038 unmask = 0;
1039 }
1040
1041 clr_bit = 0xff << eint_offset;
1042 writel(clr_bit, pctl->eint_reg_base + clr_offset);
1043
1044 bit = ((dbnc << EINT_DBNC_SET_DBNC_BITS) | EINT_DBNC_SET_EN) <<
1045 eint_offset;
1046 rst = EINT_DBNC_RST_BIT << eint_offset;
1047 writel(rst | bit, pctl->eint_reg_base + set_offset);
1048
1049 /* Delay a while (more than 2T) to wait for hw debounce counter reset
1050 work correctly */
1051 udelay(1);
1052 if (unmask == 1)
1053 mtk_eint_unmask(d);
1054
1055 return 0;
1056 }
1057
1058 static struct gpio_chip mtk_gpio_chip = {
1059 .owner = THIS_MODULE,
1060 .request = gpiochip_generic_request,
1061 .free = gpiochip_generic_free,
1062 .get_direction = mtk_gpio_get_direction,
1063 .direction_input = mtk_gpio_direction_input,
1064 .direction_output = mtk_gpio_direction_output,
1065 .get = mtk_gpio_get,
1066 .set = mtk_gpio_set,
1067 .to_irq = mtk_gpio_to_irq,
1068 .set_debounce = mtk_gpio_set_debounce,
1069 .of_gpio_n_cells = 2,
1070 };
1071
1072 static int mtk_eint_set_type(struct irq_data *d,
1073 unsigned int type)
1074 {
1075 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
1076 const struct mtk_eint_offsets *eint_offsets =
1077 &pctl->devdata->eint_offsets;
1078 u32 mask = BIT(d->hwirq & 0x1f);
1079 void __iomem *reg;
1080
1081 if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) ||
1082 ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) {
1083 dev_err(pctl->dev, "Can't configure IRQ%d (EINT%lu) for type 0x%X\n",
1084 d->irq, d->hwirq, type);
1085 return -EINVAL;
1086 }
1087
1088 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1089 pctl->eint_dual_edges[d->hwirq] = 1;
1090 else
1091 pctl->eint_dual_edges[d->hwirq] = 0;
1092
1093 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) {
1094 reg = mtk_eint_get_offset(pctl, d->hwirq,
1095 eint_offsets->pol_clr);
1096 writel(mask, reg);
1097 } else {
1098 reg = mtk_eint_get_offset(pctl, d->hwirq,
1099 eint_offsets->pol_set);
1100 writel(mask, reg);
1101 }
1102
1103 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
1104 reg = mtk_eint_get_offset(pctl, d->hwirq,
1105 eint_offsets->sens_clr);
1106 writel(mask, reg);
1107 } else {
1108 reg = mtk_eint_get_offset(pctl, d->hwirq,
1109 eint_offsets->sens_set);
1110 writel(mask, reg);
1111 }
1112
1113 if (pctl->eint_dual_edges[d->hwirq])
1114 mtk_eint_flip_edge(pctl, d->hwirq);
1115
1116 return 0;
1117 }
1118
1119 static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on)
1120 {
1121 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
1122 int shift = d->hwirq & 0x1f;
1123 int reg = d->hwirq >> 5;
1124
1125 if (on)
1126 pctl->wake_mask[reg] |= BIT(shift);
1127 else
1128 pctl->wake_mask[reg] &= ~BIT(shift);
1129
1130 return 0;
1131 }
1132
1133 static void mtk_eint_chip_write_mask(const struct mtk_eint_offsets *chip,
1134 void __iomem *eint_reg_base, u32 *buf)
1135 {
1136 int port;
1137 void __iomem *reg;
1138
1139 for (port = 0; port < chip->ports; port++) {
1140 reg = eint_reg_base + (port << 2);
1141 writel_relaxed(~buf[port], reg + chip->mask_set);
1142 writel_relaxed(buf[port], reg + chip->mask_clr);
1143 }
1144 }
1145
1146 static void mtk_eint_chip_read_mask(const struct mtk_eint_offsets *chip,
1147 void __iomem *eint_reg_base, u32 *buf)
1148 {
1149 int port;
1150 void __iomem *reg;
1151
1152 for (port = 0; port < chip->ports; port++) {
1153 reg = eint_reg_base + chip->mask + (port << 2);
1154 buf[port] = ~readl_relaxed(reg);
1155 /* Mask is 0 when irq is enabled, and 1 when disabled. */
1156 }
1157 }
1158
1159 static int mtk_eint_suspend(struct device *device)
1160 {
1161 void __iomem *reg;
1162 struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1163 const struct mtk_eint_offsets *eint_offsets =
1164 &pctl->devdata->eint_offsets;
1165
1166 reg = pctl->eint_reg_base;
1167 mtk_eint_chip_read_mask(eint_offsets, reg, pctl->cur_mask);
1168 mtk_eint_chip_write_mask(eint_offsets, reg, pctl->wake_mask);
1169
1170 return 0;
1171 }
1172
1173 static int mtk_eint_resume(struct device *device)
1174 {
1175 struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1176 const struct mtk_eint_offsets *eint_offsets =
1177 &pctl->devdata->eint_offsets;
1178
1179 mtk_eint_chip_write_mask(eint_offsets,
1180 pctl->eint_reg_base, pctl->cur_mask);
1181
1182 return 0;
1183 }
1184
1185 const struct dev_pm_ops mtk_eint_pm_ops = {
1186 .suspend = mtk_eint_suspend,
1187 .resume = mtk_eint_resume,
1188 };
1189
1190 static void mtk_eint_ack(struct irq_data *d)
1191 {
1192 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
1193 const struct mtk_eint_offsets *eint_offsets =
1194 &pctl->devdata->eint_offsets;
1195 u32 mask = BIT(d->hwirq & 0x1f);
1196 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
1197 eint_offsets->ack);
1198
1199 writel(mask, reg);
1200 }
1201
1202 static struct irq_chip mtk_pinctrl_irq_chip = {
1203 .name = "mt-eint",
1204 .irq_disable = mtk_eint_mask,
1205 .irq_mask = mtk_eint_mask,
1206 .irq_unmask = mtk_eint_unmask,
1207 .irq_ack = mtk_eint_ack,
1208 .irq_set_type = mtk_eint_set_type,
1209 .irq_set_wake = mtk_eint_irq_set_wake,
1210 .irq_request_resources = mtk_pinctrl_irq_request_resources,
1211 .irq_release_resources = mtk_pinctrl_irq_release_resources,
1212 };
1213
1214 static unsigned int mtk_eint_init(struct mtk_pinctrl *pctl)
1215 {
1216 const struct mtk_eint_offsets *eint_offsets =
1217 &pctl->devdata->eint_offsets;
1218 void __iomem *reg = pctl->eint_reg_base + eint_offsets->dom_en;
1219 unsigned int i;
1220
1221 for (i = 0; i < pctl->devdata->ap_num; i += 32) {
1222 writel(0xffffffff, reg);
1223 reg += 4;
1224 }
1225 return 0;
1226 }
1227
1228 static inline void
1229 mtk_eint_debounce_process(struct mtk_pinctrl *pctl, int index)
1230 {
1231 unsigned int rst, ctrl_offset;
1232 unsigned int bit, dbnc;
1233 const struct mtk_eint_offsets *eint_offsets =
1234 &pctl->devdata->eint_offsets;
1235
1236 ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_ctrl;
1237 dbnc = readl(pctl->eint_reg_base + ctrl_offset);
1238 bit = EINT_DBNC_SET_EN << ((index % 4) * 8);
1239 if ((bit & dbnc) > 0) {
1240 ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_set;
1241 rst = EINT_DBNC_RST_BIT << ((index % 4) * 8);
1242 writel(rst, pctl->eint_reg_base + ctrl_offset);
1243 }
1244 }
1245
1246 static void mtk_eint_irq_handler(struct irq_desc *desc)
1247 {
1248 struct irq_chip *chip = irq_desc_get_chip(desc);
1249 struct mtk_pinctrl *pctl = irq_desc_get_handler_data(desc);
1250 unsigned int status, eint_num;
1251 int offset, index, virq;
1252 const struct mtk_eint_offsets *eint_offsets =
1253 &pctl->devdata->eint_offsets;
1254 void __iomem *reg = mtk_eint_get_offset(pctl, 0, eint_offsets->stat);
1255 int dual_edges, start_level, curr_level;
1256 const struct mtk_desc_pin *pin;
1257
1258 chained_irq_enter(chip, desc);
1259 for (eint_num = 0;
1260 eint_num < pctl->devdata->ap_num;
1261 eint_num += 32, reg += 4) {
1262 status = readl(reg);
1263 while (status) {
1264 offset = __ffs(status);
1265 index = eint_num + offset;
1266 virq = irq_find_mapping(pctl->domain, index);
1267 status &= ~BIT(offset);
1268
1269 dual_edges = pctl->eint_dual_edges[index];
1270 if (dual_edges) {
1271 /* Clear soft-irq in case we raised it
1272 last time */
1273 writel(BIT(offset), reg - eint_offsets->stat +
1274 eint_offsets->soft_clr);
1275
1276 pin = mtk_find_pin_by_eint_num(pctl, index);
1277 start_level = mtk_gpio_get(pctl->chip,
1278 pin->pin.number);
1279 }
1280
1281 generic_handle_irq(virq);
1282
1283 if (dual_edges) {
1284 curr_level = mtk_eint_flip_edge(pctl, index);
1285
1286 /* If level changed, we might lost one edge
1287 interrupt, raised it through soft-irq */
1288 if (start_level != curr_level)
1289 writel(BIT(offset), reg -
1290 eint_offsets->stat +
1291 eint_offsets->soft_set);
1292 }
1293
1294 if (index < pctl->devdata->db_cnt)
1295 mtk_eint_debounce_process(pctl , index);
1296 }
1297 }
1298 chained_irq_exit(chip, desc);
1299 }
1300
1301 static int mtk_pctrl_build_state(struct platform_device *pdev)
1302 {
1303 struct mtk_pinctrl *pctl = platform_get_drvdata(pdev);
1304 int i;
1305
1306 pctl->ngroups = pctl->devdata->npins;
1307
1308 /* Allocate groups */
1309 pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups,
1310 sizeof(*pctl->groups), GFP_KERNEL);
1311 if (!pctl->groups)
1312 return -ENOMEM;
1313
1314 /* We assume that one pin is one group, use pin name as group name. */
1315 pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups,
1316 sizeof(*pctl->grp_names), GFP_KERNEL);
1317 if (!pctl->grp_names)
1318 return -ENOMEM;
1319
1320 for (i = 0; i < pctl->devdata->npins; i++) {
1321 const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
1322 struct mtk_pinctrl_group *group = pctl->groups + i;
1323
1324 group->name = pin->pin.name;
1325 group->pin = pin->pin.number;
1326
1327 pctl->grp_names[i] = pin->pin.name;
1328 }
1329
1330 return 0;
1331 }
1332
1333 int mtk_pctrl_init(struct platform_device *pdev,
1334 const struct mtk_pinctrl_devdata *data,
1335 struct regmap *regmap)
1336 {
1337 struct pinctrl_pin_desc *pins;
1338 struct mtk_pinctrl *pctl;
1339 struct device_node *np = pdev->dev.of_node, *node;
1340 struct property *prop;
1341 struct resource *res;
1342 int i, ret, irq, ports_buf;
1343
1344 pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
1345 if (!pctl)
1346 return -ENOMEM;
1347
1348 platform_set_drvdata(pdev, pctl);
1349
1350 prop = of_find_property(np, "pins-are-numbered", NULL);
1351 if (!prop) {
1352 dev_err(&pdev->dev, "only support pins-are-numbered format\n");
1353 return -EINVAL;
1354 }
1355
1356 node = of_parse_phandle(np, "mediatek,pctl-regmap", 0);
1357 if (node) {
1358 pctl->regmap1 = syscon_node_to_regmap(node);
1359 if (IS_ERR(pctl->regmap1))
1360 return PTR_ERR(pctl->regmap1);
1361 } else if (regmap) {
1362 pctl->regmap1 = regmap;
1363 } else {
1364 dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n");
1365 return -EINVAL;
1366 }
1367
1368 /* Only 8135 has two base addr, other SoCs have only one. */
1369 node = of_parse_phandle(np, "mediatek,pctl-regmap", 1);
1370 if (node) {
1371 pctl->regmap2 = syscon_node_to_regmap(node);
1372 if (IS_ERR(pctl->regmap2))
1373 return PTR_ERR(pctl->regmap2);
1374 }
1375
1376 pctl->devdata = data;
1377 ret = mtk_pctrl_build_state(pdev);
1378 if (ret) {
1379 dev_err(&pdev->dev, "build state failed: %d\n", ret);
1380 return -EINVAL;
1381 }
1382
1383 pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins),
1384 GFP_KERNEL);
1385 if (!pins)
1386 return -ENOMEM;
1387
1388 for (i = 0; i < pctl->devdata->npins; i++)
1389 pins[i] = pctl->devdata->pins[i].pin;
1390
1391 pctl->pctl_desc.name = dev_name(&pdev->dev);
1392 pctl->pctl_desc.owner = THIS_MODULE;
1393 pctl->pctl_desc.pins = pins;
1394 pctl->pctl_desc.npins = pctl->devdata->npins;
1395 pctl->pctl_desc.confops = &mtk_pconf_ops;
1396 pctl->pctl_desc.pctlops = &mtk_pctrl_ops;
1397 pctl->pctl_desc.pmxops = &mtk_pmx_ops;
1398 pctl->dev = &pdev->dev;
1399
1400 pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc,
1401 pctl);
1402 if (IS_ERR(pctl->pctl_dev)) {
1403 dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
1404 return PTR_ERR(pctl->pctl_dev);
1405 }
1406
1407 pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
1408 if (!pctl->chip)
1409 return -ENOMEM;
1410
1411 *pctl->chip = mtk_gpio_chip;
1412 pctl->chip->ngpio = pctl->devdata->npins;
1413 pctl->chip->label = dev_name(&pdev->dev);
1414 pctl->chip->parent = &pdev->dev;
1415 pctl->chip->base = -1;
1416
1417 ret = gpiochip_add_data(pctl->chip, pctl);
1418 if (ret)
1419 return -EINVAL;
1420
1421 /* Register the GPIO to pin mappings. */
1422 ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
1423 0, 0, pctl->devdata->npins);
1424 if (ret) {
1425 ret = -EINVAL;
1426 goto chip_error;
1427 }
1428
1429 if (!of_property_read_bool(np, "interrupt-controller"))
1430 return 0;
1431
1432 /* Get EINT register base from dts. */
1433 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1434 if (!res) {
1435 dev_err(&pdev->dev, "Unable to get Pinctrl resource\n");
1436 ret = -EINVAL;
1437 goto chip_error;
1438 }
1439
1440 pctl->eint_reg_base = devm_ioremap_resource(&pdev->dev, res);
1441 if (IS_ERR(pctl->eint_reg_base)) {
1442 ret = -EINVAL;
1443 goto chip_error;
1444 }
1445
1446 ports_buf = pctl->devdata->eint_offsets.ports;
1447 pctl->wake_mask = devm_kcalloc(&pdev->dev, ports_buf,
1448 sizeof(*pctl->wake_mask), GFP_KERNEL);
1449 if (!pctl->wake_mask) {
1450 ret = -ENOMEM;
1451 goto chip_error;
1452 }
1453
1454 pctl->cur_mask = devm_kcalloc(&pdev->dev, ports_buf,
1455 sizeof(*pctl->cur_mask), GFP_KERNEL);
1456 if (!pctl->cur_mask) {
1457 ret = -ENOMEM;
1458 goto chip_error;
1459 }
1460
1461 pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num,
1462 sizeof(int), GFP_KERNEL);
1463 if (!pctl->eint_dual_edges) {
1464 ret = -ENOMEM;
1465 goto chip_error;
1466 }
1467
1468 irq = irq_of_parse_and_map(np, 0);
1469 if (!irq) {
1470 dev_err(&pdev->dev, "couldn't parse and map irq\n");
1471 ret = -EINVAL;
1472 goto chip_error;
1473 }
1474
1475 pctl->domain = irq_domain_add_linear(np,
1476 pctl->devdata->ap_num, &irq_domain_simple_ops, NULL);
1477 if (!pctl->domain) {
1478 dev_err(&pdev->dev, "Couldn't register IRQ domain\n");
1479 ret = -ENOMEM;
1480 goto chip_error;
1481 }
1482
1483 mtk_eint_init(pctl);
1484 for (i = 0; i < pctl->devdata->ap_num; i++) {
1485 int virq = irq_create_mapping(pctl->domain, i);
1486
1487 irq_set_chip_and_handler(virq, &mtk_pinctrl_irq_chip,
1488 handle_level_irq);
1489 irq_set_chip_data(virq, pctl);
1490 }
1491
1492 irq_set_chained_handler_and_data(irq, mtk_eint_irq_handler, pctl);
1493 return 0;
1494
1495 chip_error:
1496 gpiochip_remove(pctl->chip);
1497 return ret;
1498 }
1499
1500 MODULE_LICENSE("GPL");
1501 MODULE_DESCRIPTION("MediaTek Pinctrl Driver");
1502 MODULE_AUTHOR("Hongzhou Yang <hongzhou.yang@mediatek.com>");
Linux with added FPC-III support