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Linux 4.16.11
[linux/fpc-iii.git] / drivers / pinctrl / mediatek / pinctrl-mtk-common.c
blob3cf384f8b122879722e1b377379ecadcb73da77b
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/of.h>
19 #include <linux/of_address.h>
20 #include <linux/of_device.h>
21 #include <linux/of_irq.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/pinctrl/machine.h>
24 #include <linux/pinctrl/pinconf.h>
25 #include <linux/pinctrl/pinconf-generic.h>
26 #include <linux/pinctrl/pinctrl.h>
27 #include <linux/pinctrl/pinmux.h>
28 #include <linux/platform_device.h>
29 #include <linux/slab.h>
30 #include <linux/bitops.h>
31 #include <linux/regmap.h>
32 #include <linux/mfd/syscon.h>
33 #include <linux/delay.h>
34 #include <linux/interrupt.h>
35 #include <linux/pm.h>
36 #include <dt-bindings/pinctrl/mt65xx.h>
37
38 #include "../core.h"
39 #include "../pinconf.h"
40 #include "../pinctrl-utils.h"
41 #include "pinctrl-mtk-common.h"
42
43 #define MAX_GPIO_MODE_PER_REG 5
44 #define GPIO_MODE_BITS 3
45 #define GPIO_MODE_PREFIX "GPIO"
46
47 static const char * const mtk_gpio_functions[] = {
48 "func0", "func1", "func2", "func3",
49 "func4", "func5", "func6", "func7",
50 "func8", "func9", "func10", "func11",
51 "func12", "func13", "func14", "func15",
52 };
53
54 /*
55 * There are two base address for pull related configuration
56 * in mt8135, and different GPIO pins use different base address.
57 * When pin number greater than type1_start and less than type1_end,
58 * should use the second base address.
59 */
60 static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl,
61 unsigned long pin)
62 {
63 if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end)
64 return pctl->regmap2;
65 return pctl->regmap1;
66 }
67
68 static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin)
69 {
70 /* Different SoC has different mask and port shift. */
71 return ((pin >> 4) & pctl->devdata->port_mask)
72 << pctl->devdata->port_shf;
73 }
74
75 static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
76 struct pinctrl_gpio_range *range, unsigned offset,
77 bool input)
78 {
79 unsigned int reg_addr;
80 unsigned int bit;
81 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
82
83 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
84 bit = BIT(offset & 0xf);
85
86 if (pctl->devdata->spec_dir_set)
87 pctl->devdata->spec_dir_set(&reg_addr, offset);
88
89 if (input)
90 /* Different SoC has different alignment offset. */
91 reg_addr = CLR_ADDR(reg_addr, pctl);
92 else
93 reg_addr = SET_ADDR(reg_addr, pctl);
94
95 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
96 return 0;
97 }
98
99 static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
100 {
101 unsigned int reg_addr;
102 unsigned int bit;
103 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
104
105 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset;
106 bit = BIT(offset & 0xf);
107
108 if (value)
109 reg_addr = SET_ADDR(reg_addr, pctl);
110 else
111 reg_addr = CLR_ADDR(reg_addr, pctl);
112
113 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
114 }
115
116 static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin,
117 int value, enum pin_config_param arg)
118 {
119 unsigned int reg_addr, offset;
120 unsigned int bit;
121
122 /**
123 * Due to some soc are not support ies/smt config, add this special
124 * control to handle it.
125 */
126 if (!pctl->devdata->spec_ies_smt_set &&
127 pctl->devdata->ies_offset == MTK_PINCTRL_NOT_SUPPORT &&
128 arg == PIN_CONFIG_INPUT_ENABLE)
129 return -EINVAL;
130
131 if (!pctl->devdata->spec_ies_smt_set &&
132 pctl->devdata->smt_offset == MTK_PINCTRL_NOT_SUPPORT &&
133 arg == PIN_CONFIG_INPUT_SCHMITT_ENABLE)
134 return -EINVAL;
135
136 /*
137 * Due to some pins are irregular, their input enable and smt
138 * control register are discontinuous, so we need this special handle.
139 */
140 if (pctl->devdata->spec_ies_smt_set) {
141 return pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin),
142 pin, pctl->devdata->port_align, value, arg);
143 }
144
145 bit = BIT(pin & 0xf);
146
147 if (arg == PIN_CONFIG_INPUT_ENABLE)
148 offset = pctl->devdata->ies_offset;
149 else
150 offset = pctl->devdata->smt_offset;
151
152 if (value)
153 reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
154 else
155 reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
156
157 regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit);
158 return 0;
159 }
160
161 int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap,
162 const struct mtk_pin_ies_smt_set *ies_smt_infos, unsigned int info_num,
163 unsigned int pin, unsigned char align, int value)
164 {
165 unsigned int i, reg_addr, bit;
166
167 for (i = 0; i < info_num; i++) {
168 if (pin >= ies_smt_infos[i].start &&
169 pin <= ies_smt_infos[i].end) {
170 break;
171 }
172 }
173
174 if (i == info_num)
175 return -EINVAL;
176
177 if (value)
178 reg_addr = ies_smt_infos[i].offset + align;
179 else
180 reg_addr = ies_smt_infos[i].offset + (align << 1);
181
182 bit = BIT(ies_smt_infos[i].bit);
183 regmap_write(regmap, reg_addr, bit);
184 return 0;
185 }
186
187 static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin(
188 struct mtk_pinctrl *pctl, unsigned long pin) {
189 int i;
190
191 for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) {
192 const struct mtk_pin_drv_grp *pin_drv =
193 pctl->devdata->pin_drv_grp + i;
194 if (pin == pin_drv->pin)
195 return pin_drv;
196 }
197
198 return NULL;
199 }
200
201 static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl,
202 unsigned int pin, unsigned char driving)
203 {
204 const struct mtk_pin_drv_grp *pin_drv;
205 unsigned int val;
206 unsigned int bits, mask, shift;
207 const struct mtk_drv_group_desc *drv_grp;
208
209 if (pin >= pctl->devdata->npins)
210 return -EINVAL;
211
212 pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin);
213 if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls)
214 return -EINVAL;
215
216 drv_grp = pctl->devdata->grp_desc + pin_drv->grp;
217 if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv
218 && !(driving % drv_grp->step)) {
219 val = driving / drv_grp->step - 1;
220 bits = drv_grp->high_bit - drv_grp->low_bit + 1;
221 mask = BIT(bits) - 1;
222 shift = pin_drv->bit + drv_grp->low_bit;
223 mask <<= shift;
224 val <<= shift;
225 return regmap_update_bits(mtk_get_regmap(pctl, pin),
226 pin_drv->offset, mask, val);
227 }
228
229 return -EINVAL;
230 }
231
232 int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap,
233 const struct mtk_pin_spec_pupd_set_samereg *pupd_infos,
234 unsigned int info_num, unsigned int pin,
235 unsigned char align, bool isup, unsigned int r1r0)
236 {
237 unsigned int i;
238 unsigned int reg_pupd, reg_set, reg_rst;
239 unsigned int bit_pupd, bit_r0, bit_r1;
240 const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin;
241 bool find = false;
242
243 for (i = 0; i < info_num; i++) {
244 if (pin == pupd_infos[i].pin) {
245 find = true;
246 break;
247 }
248 }
249
250 if (!find)
251 return -EINVAL;
252
253 spec_pupd_pin = pupd_infos + i;
254 reg_set = spec_pupd_pin->offset + align;
255 reg_rst = spec_pupd_pin->offset + (align << 1);
256
257 if (isup)
258 reg_pupd = reg_rst;
259 else
260 reg_pupd = reg_set;
261
262 bit_pupd = BIT(spec_pupd_pin->pupd_bit);
263 regmap_write(regmap, reg_pupd, bit_pupd);
264
265 bit_r0 = BIT(spec_pupd_pin->r0_bit);
266 bit_r1 = BIT(spec_pupd_pin->r1_bit);
267
268 switch (r1r0) {
269 case MTK_PUPD_SET_R1R0_00:
270 regmap_write(regmap, reg_rst, bit_r0);
271 regmap_write(regmap, reg_rst, bit_r1);
272 break;
273 case MTK_PUPD_SET_R1R0_01:
274 regmap_write(regmap, reg_set, bit_r0);
275 regmap_write(regmap, reg_rst, bit_r1);
276 break;
277 case MTK_PUPD_SET_R1R0_10:
278 regmap_write(regmap, reg_rst, bit_r0);
279 regmap_write(regmap, reg_set, bit_r1);
280 break;
281 case MTK_PUPD_SET_R1R0_11:
282 regmap_write(regmap, reg_set, bit_r0);
283 regmap_write(regmap, reg_set, bit_r1);
284 break;
285 default:
286 return -EINVAL;
287 }
288
289 return 0;
290 }
291
292 static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
293 unsigned int pin, bool enable, bool isup, unsigned int arg)
294 {
295 unsigned int bit;
296 unsigned int reg_pullen, reg_pullsel;
297 int ret;
298
299 /* Some pins' pull setting are very different,
300 * they have separate pull up/down bit, R0 and R1
301 * resistor bit, so we need this special handle.
302 */
303 if (pctl->devdata->spec_pull_set) {
304 ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
305 pin, pctl->devdata->port_align, isup, arg);
306 if (!ret)
307 return 0;
308 }
309
310 /* For generic pull config, default arg value should be 0 or 1. */
311 if (arg != 0 && arg != 1) {
312 dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n",
313 arg, pin);
314 return -EINVAL;
315 }
316
317 bit = BIT(pin & 0xf);
318 if (enable)
319 reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) +
320 pctl->devdata->pullen_offset, pctl);
321 else
322 reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) +
323 pctl->devdata->pullen_offset, pctl);
324
325 if (isup)
326 reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) +
327 pctl->devdata->pullsel_offset, pctl);
328 else
329 reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) +
330 pctl->devdata->pullsel_offset, pctl);
331
332 regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit);
333 regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit);
334 return 0;
335 }
336
337 static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
338 unsigned int pin, enum pin_config_param param,
339 enum pin_config_param arg)
340 {
341 int ret = 0;
342 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
343
344 switch (param) {
345 case PIN_CONFIG_BIAS_DISABLE:
346 ret = mtk_pconf_set_pull_select(pctl, pin, false, false, arg);
347 break;
348 case PIN_CONFIG_BIAS_PULL_UP:
349 ret = mtk_pconf_set_pull_select(pctl, pin, true, true, arg);
350 break;
351 case PIN_CONFIG_BIAS_PULL_DOWN:
352 ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg);
353 break;
354 case PIN_CONFIG_INPUT_ENABLE:
355 mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
356 ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
357 break;
358 case PIN_CONFIG_OUTPUT:
359 mtk_gpio_set(pctl->chip, pin, arg);
360 ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false);
361 break;
362 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
363 mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
364 ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
365 break;
366 case PIN_CONFIG_DRIVE_STRENGTH:
367 ret = mtk_pconf_set_driving(pctl, pin, arg);
368 break;
369 default:
370 ret = -EINVAL;
371 }
372
373 return ret;
374 }
375
376 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev,
377 unsigned group,
378 unsigned long *config)
379 {
380 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
381
382 *config = pctl->groups[group].config;
383
384 return 0;
385 }
386
387 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
388 unsigned long *configs, unsigned num_configs)
389 {
390 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
391 struct mtk_pinctrl_group *g = &pctl->groups[group];
392 int i, ret;
393
394 for (i = 0; i < num_configs; i++) {
395 ret = mtk_pconf_parse_conf(pctldev, g->pin,
396 pinconf_to_config_param(configs[i]),
397 pinconf_to_config_argument(configs[i]));
398 if (ret < 0)
399 return ret;
400
401 g->config = configs[i];
402 }
403
404 return 0;
405 }
406
407 static const struct pinconf_ops mtk_pconf_ops = {
408 .pin_config_group_get = mtk_pconf_group_get,
409 .pin_config_group_set = mtk_pconf_group_set,
410 };
411
412 static struct mtk_pinctrl_group *
413 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin)
414 {
415 int i;
416
417 for (i = 0; i < pctl->ngroups; i++) {
418 struct mtk_pinctrl_group *grp = pctl->groups + i;
419
420 if (grp->pin == pin)
421 return grp;
422 }
423
424 return NULL;
425 }
426
427 static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin(
428 struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum)
429 {
430 const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num;
431 const struct mtk_desc_function *func = pin->functions;
432
433 while (func && func->name) {
434 if (func->muxval == fnum)
435 return func;
436 func++;
437 }
438
439 return NULL;
440 }
441
442 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl,
443 u32 pin_num, u32 fnum)
444 {
445 int i;
446
447 for (i = 0; i < pctl->devdata->npins; i++) {
448 const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
449
450 if (pin->pin.number == pin_num) {
451 const struct mtk_desc_function *func =
452 pin->functions;
453
454 while (func && func->name) {
455 if (func->muxval == fnum)
456 return true;
457 func++;
458 }
459
460 break;
461 }
462 }
463
464 return false;
465 }
466
467 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
468 u32 pin, u32 fnum, struct mtk_pinctrl_group *grp,
469 struct pinctrl_map **map, unsigned *reserved_maps,
470 unsigned *num_maps)
471 {
472 bool ret;
473
474 if (*num_maps == *reserved_maps)
475 return -ENOSPC;
476
477 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
478 (*map)[*num_maps].data.mux.group = grp->name;
479
480 ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
481 if (!ret) {
482 dev_err(pctl->dev, "invalid function %d on pin %d .\n",
483 fnum, pin);
484 return -EINVAL;
485 }
486
487 (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
488 (*num_maps)++;
489
490 return 0;
491 }
492
493 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
494 struct device_node *node,
495 struct pinctrl_map **map,
496 unsigned *reserved_maps,
497 unsigned *num_maps)
498 {
499 struct property *pins;
500 u32 pinfunc, pin, func;
501 int num_pins, num_funcs, maps_per_pin;
502 unsigned long *configs;
503 unsigned int num_configs;
504 bool has_config = 0;
505 int i, err;
506 unsigned reserve = 0;
507 struct mtk_pinctrl_group *grp;
508 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
509
510 pins = of_find_property(node, "pinmux", NULL);
511 if (!pins) {
512 dev_err(pctl->dev, "missing pins property in node %s .\n",
513 node->name);
514 return -EINVAL;
515 }
516
517 err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
518 &num_configs);
519 if (err)
520 return err;
521
522 if (num_configs)
523 has_config = 1;
524
525 num_pins = pins->length / sizeof(u32);
526 num_funcs = num_pins;
527 maps_per_pin = 0;
528 if (num_funcs)
529 maps_per_pin++;
530 if (has_config && num_pins >= 1)
531 maps_per_pin++;
532
533 if (!num_pins || !maps_per_pin) {
534 err = -EINVAL;
535 goto exit;
536 }
537
538 reserve = num_pins * maps_per_pin;
539
540 err = pinctrl_utils_reserve_map(pctldev, map,
541 reserved_maps, num_maps, reserve);
542 if (err < 0)
543 goto exit;
544
545 for (i = 0; i < num_pins; i++) {
546 err = of_property_read_u32_index(node, "pinmux",
547 i, &pinfunc);
548 if (err)
549 goto exit;
550
551 pin = MTK_GET_PIN_NO(pinfunc);
552 func = MTK_GET_PIN_FUNC(pinfunc);
553
554 if (pin >= pctl->devdata->npins ||
555 func >= ARRAY_SIZE(mtk_gpio_functions)) {
556 dev_err(pctl->dev, "invalid pins value.\n");
557 err = -EINVAL;
558 goto exit;
559 }
560
561 grp = mtk_pctrl_find_group_by_pin(pctl, pin);
562 if (!grp) {
563 dev_err(pctl->dev, "unable to match pin %d to group\n",
564 pin);
565 err = -EINVAL;
566 goto exit;
567 }
568
569 err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
570 reserved_maps, num_maps);
571 if (err < 0)
572 goto exit;
573
574 if (has_config) {
575 err = pinctrl_utils_add_map_configs(pctldev, map,
576 reserved_maps, num_maps, grp->name,
577 configs, num_configs,
578 PIN_MAP_TYPE_CONFIGS_GROUP);
579 if (err < 0)
580 goto exit;
581 }
582 }
583
584 err = 0;
585
586 exit:
587 kfree(configs);
588 return err;
589 }
590
591 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
592 struct device_node *np_config,
593 struct pinctrl_map **map, unsigned *num_maps)
594 {
595 struct device_node *np;
596 unsigned reserved_maps;
597 int ret;
598
599 *map = NULL;
600 *num_maps = 0;
601 reserved_maps = 0;
602
603 for_each_child_of_node(np_config, np) {
604 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
605 &reserved_maps, num_maps);
606 if (ret < 0) {
607 pinctrl_utils_free_map(pctldev, *map, *num_maps);
608 of_node_put(np);
609 return ret;
610 }
611 }
612
613 return 0;
614 }
615
616 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
617 {
618 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
619
620 return pctl->ngroups;
621 }
622
623 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
624 unsigned group)
625 {
626 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
627
628 return pctl->groups[group].name;
629 }
630
631 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
632 unsigned group,
633 const unsigned **pins,
634 unsigned *num_pins)
635 {
636 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
637
638 *pins = (unsigned *)&pctl->groups[group].pin;
639 *num_pins = 1;
640
641 return 0;
642 }
643
644 static const struct pinctrl_ops mtk_pctrl_ops = {
645 .dt_node_to_map = mtk_pctrl_dt_node_to_map,
646 .dt_free_map = pinctrl_utils_free_map,
647 .get_groups_count = mtk_pctrl_get_groups_count,
648 .get_group_name = mtk_pctrl_get_group_name,
649 .get_group_pins = mtk_pctrl_get_group_pins,
650 };
651
652 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
653 {
654 return ARRAY_SIZE(mtk_gpio_functions);
655 }
656
657 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
658 unsigned selector)
659 {
660 return mtk_gpio_functions[selector];
661 }
662
663 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
664 unsigned function,
665 const char * const **groups,
666 unsigned * const num_groups)
667 {
668 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
669
670 *groups = pctl->grp_names;
671 *num_groups = pctl->ngroups;
672
673 return 0;
674 }
675
676 static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev,
677 unsigned long pin, unsigned long mode)
678 {
679 unsigned int reg_addr;
680 unsigned char bit;
681 unsigned int val;
682 unsigned int mask = (1L << GPIO_MODE_BITS) - 1;
683 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
684
685 if (pctl->devdata->spec_pinmux_set)
686 pctl->devdata->spec_pinmux_set(mtk_get_regmap(pctl, pin),
687 pin, mode);
688
689 reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf)
690 + pctl->devdata->pinmux_offset;
691
692 mode &= mask;
693 bit = pin % MAX_GPIO_MODE_PER_REG;
694 mask <<= (GPIO_MODE_BITS * bit);
695 val = (mode << (GPIO_MODE_BITS * bit));
696 return regmap_update_bits(mtk_get_regmap(pctl, pin),
697 reg_addr, mask, val);
698 }
699
700 static const struct mtk_desc_pin *
701 mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num)
702 {
703 int i;
704 const struct mtk_desc_pin *pin;
705
706 for (i = 0; i < pctl->devdata->npins; i++) {
707 pin = pctl->devdata->pins + i;
708 if (pin->eint.eintnum == eint_num)
709 return pin;
710 }
711
712 return NULL;
713 }
714
715 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
716 unsigned function,
717 unsigned group)
718 {
719 bool ret;
720 const struct mtk_desc_function *desc;
721 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
722 struct mtk_pinctrl_group *g = pctl->groups + group;
723
724 ret = mtk_pctrl_is_function_valid(pctl, g->pin, function);
725 if (!ret) {
726 dev_err(pctl->dev, "invalid function %d on group %d .\n",
727 function, group);
728 return -EINVAL;
729 }
730
731 desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function);
732 if (!desc)
733 return -EINVAL;
734 mtk_pmx_set_mode(pctldev, g->pin, desc->muxval);
735 return 0;
736 }
737
738 static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl,
739 unsigned offset)
740 {
741 const struct mtk_desc_pin *pin = pctl->devdata->pins + offset;
742 const struct mtk_desc_function *func = pin->functions;
743
744 while (func && func->name) {
745 if (!strncmp(func->name, GPIO_MODE_PREFIX,
746 sizeof(GPIO_MODE_PREFIX)-1))
747 return func->muxval;
748 func++;
749 }
750 return -EINVAL;
751 }
752
753 static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
754 struct pinctrl_gpio_range *range,
755 unsigned offset)
756 {
757 int muxval;
758 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
759
760 muxval = mtk_pmx_find_gpio_mode(pctl, offset);
761
762 if (muxval < 0) {
763 dev_err(pctl->dev, "invalid gpio pin %d.\n", offset);
764 return -EINVAL;
765 }
766
767 mtk_pmx_set_mode(pctldev, offset, muxval);
768 mtk_pconf_set_ies_smt(pctl, offset, 1, PIN_CONFIG_INPUT_ENABLE);
769
770 return 0;
771 }
772
773 static const struct pinmux_ops mtk_pmx_ops = {
774 .get_functions_count = mtk_pmx_get_funcs_cnt,
775 .get_function_name = mtk_pmx_get_func_name,
776 .get_function_groups = mtk_pmx_get_func_groups,
777 .set_mux = mtk_pmx_set_mux,
778 .gpio_set_direction = mtk_pmx_gpio_set_direction,
779 .gpio_request_enable = mtk_pmx_gpio_request_enable,
780 };
781
782 static int mtk_gpio_direction_input(struct gpio_chip *chip,
783 unsigned offset)
784 {
785 return pinctrl_gpio_direction_input(chip->base + offset);
786 }
787
788 static int mtk_gpio_direction_output(struct gpio_chip *chip,
789 unsigned offset, int value)
790 {
791 mtk_gpio_set(chip, offset, value);
792 return pinctrl_gpio_direction_output(chip->base + offset);
793 }
794
795 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
796 {
797 unsigned int reg_addr;
798 unsigned int bit;
799 unsigned int read_val = 0;
800
801 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
802
803 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
804 bit = BIT(offset & 0xf);
805
806 if (pctl->devdata->spec_dir_set)
807 pctl->devdata->spec_dir_set(&reg_addr, offset);
808
809 regmap_read(pctl->regmap1, reg_addr, &read_val);
810 return !(read_val & bit);
811 }
812
813 static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset)
814 {
815 unsigned int reg_addr;
816 unsigned int bit;
817 unsigned int read_val = 0;
818 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
819
820 reg_addr = mtk_get_port(pctl, offset) +
821 pctl->devdata->din_offset;
822
823 bit = BIT(offset & 0xf);
824 regmap_read(pctl->regmap1, reg_addr, &read_val);
825 return !!(read_val & bit);
826 }
827
828 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
829 {
830 const struct mtk_desc_pin *pin;
831 struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
832 int irq;
833
834 pin = pctl->devdata->pins + offset;
835 if (pin->eint.eintnum == NO_EINT_SUPPORT)
836 return -EINVAL;
837
838 irq = irq_find_mapping(pctl->domain, pin->eint.eintnum);
839 if (!irq)
840 return -EINVAL;
841
842 return irq;
843 }
844
845 static int mtk_pinctrl_irq_request_resources(struct irq_data *d)
846 {
847 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
848 const struct mtk_desc_pin *pin;
849 int ret;
850
851 pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
852
853 if (!pin) {
854 dev_err(pctl->dev, "Can not find pin\n");
855 return -EINVAL;
856 }
857
858 ret = gpiochip_lock_as_irq(pctl->chip, pin->pin.number);
859 if (ret) {
860 dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
861 irqd_to_hwirq(d));
862 return ret;
863 }
864
865 /* set mux to INT mode */
866 mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux);
867 /* set gpio direction to input */
868 mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, true);
869 /* set input-enable */
870 mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, PIN_CONFIG_INPUT_ENABLE);
871
872 return 0;
873 }
874
875 static void mtk_pinctrl_irq_release_resources(struct irq_data *d)
876 {
877 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
878 const struct mtk_desc_pin *pin;
879
880 pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
881
882 if (!pin) {
883 dev_err(pctl->dev, "Can not find pin\n");
884 return;
885 }
886
887 gpiochip_unlock_as_irq(pctl->chip, pin->pin.number);
888 }
889
890 static void __iomem *mtk_eint_get_offset(struct mtk_pinctrl *pctl,
891 unsigned int eint_num, unsigned int offset)
892 {
893 unsigned int eint_base = 0;
894 void __iomem *reg;
895
896 if (eint_num >= pctl->devdata->ap_num)
897 eint_base = pctl->devdata->ap_num;
898
899 reg = pctl->eint_reg_base + offset + ((eint_num - eint_base) / 32) * 4;
900
901 return reg;
902 }
903
904 /*
905 * mtk_can_en_debounce: Check the EINT number is able to enable debounce or not
906 * @eint_num: the EINT number to setmtk_pinctrl
907 */
908 static unsigned int mtk_eint_can_en_debounce(struct mtk_pinctrl *pctl,
909 unsigned int eint_num)
910 {
911 unsigned int sens;
912 unsigned int bit = BIT(eint_num % 32);
913 const struct mtk_eint_offsets *eint_offsets =
914 &pctl->devdata->eint_offsets;
915
916 void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
917 eint_offsets->sens);
918
919 if (readl(reg) & bit)
920 sens = MT_LEVEL_SENSITIVE;
921 else
922 sens = MT_EDGE_SENSITIVE;
923
924 if ((eint_num < pctl->devdata->db_cnt) && (sens != MT_EDGE_SENSITIVE))
925 return 1;
926 else
927 return 0;
928 }
929
930 /*
931 * mtk_eint_get_mask: To get the eint mask
932 * @eint_num: the EINT number to get
933 */
934 static unsigned int mtk_eint_get_mask(struct mtk_pinctrl *pctl,
935 unsigned int eint_num)
936 {
937 unsigned int bit = BIT(eint_num % 32);
938 const struct mtk_eint_offsets *eint_offsets =
939 &pctl->devdata->eint_offsets;
940
941 void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
942 eint_offsets->mask);
943
944 return !!(readl(reg) & bit);
945 }
946
947 static int mtk_eint_flip_edge(struct mtk_pinctrl *pctl, int hwirq)
948 {
949 int start_level, curr_level;
950 unsigned int reg_offset;
951 const struct mtk_eint_offsets *eint_offsets = &(pctl->devdata->eint_offsets);
952 u32 mask = BIT(hwirq & 0x1f);
953 u32 port = (hwirq >> 5) & eint_offsets->port_mask;
954 void __iomem *reg = pctl->eint_reg_base + (port << 2);
955 const struct mtk_desc_pin *pin;
956
957 pin = mtk_find_pin_by_eint_num(pctl, hwirq);
958 curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
959 do {
960 start_level = curr_level;
961 if (start_level)
962 reg_offset = eint_offsets->pol_clr;
963 else
964 reg_offset = eint_offsets->pol_set;
965 writel(mask, reg + reg_offset);
966
967 curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
968 } while (start_level != curr_level);
969
970 return start_level;
971 }
972
973 static void mtk_eint_mask(struct irq_data *d)
974 {
975 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
976 const struct mtk_eint_offsets *eint_offsets =
977 &pctl->devdata->eint_offsets;
978 u32 mask = BIT(d->hwirq & 0x1f);
979 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
980 eint_offsets->mask_set);
981
982 writel(mask, reg);
983 }
984
985 static void mtk_eint_unmask(struct irq_data *d)
986 {
987 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
988 const struct mtk_eint_offsets *eint_offsets =
989 &pctl->devdata->eint_offsets;
990 u32 mask = BIT(d->hwirq & 0x1f);
991 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
992 eint_offsets->mask_clr);
993
994 writel(mask, reg);
995
996 if (pctl->eint_dual_edges[d->hwirq])
997 mtk_eint_flip_edge(pctl, d->hwirq);
998 }
999
1000 static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
1001 unsigned debounce)
1002 {
1003 struct mtk_pinctrl *pctl = dev_get_drvdata(chip->parent);
1004 int eint_num, virq, eint_offset;
1005 unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc;
1006 static const unsigned int debounce_time[] = {500, 1000, 16000, 32000, 64000,
1007 128000, 256000};
1008 const struct mtk_desc_pin *pin;
1009 struct irq_data *d;
1010
1011 pin = pctl->devdata->pins + offset;
1012 if (pin->eint.eintnum == NO_EINT_SUPPORT)
1013 return -EINVAL;
1014
1015 eint_num = pin->eint.eintnum;
1016 virq = irq_find_mapping(pctl->domain, eint_num);
1017 eint_offset = (eint_num % 4) * 8;
1018 d = irq_get_irq_data(virq);
1019
1020 set_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_set;
1021 clr_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_clr;
1022 if (!mtk_eint_can_en_debounce(pctl, eint_num))
1023 return -ENOSYS;
1024
1025 dbnc = ARRAY_SIZE(debounce_time);
1026 for (i = 0; i < ARRAY_SIZE(debounce_time); i++) {
1027 if (debounce <= debounce_time[i]) {
1028 dbnc = i;
1029 break;
1030 }
1031 }
1032
1033 if (!mtk_eint_get_mask(pctl, eint_num)) {
1034 mtk_eint_mask(d);
1035 unmask = 1;
1036 } else {
1037 unmask = 0;
1038 }
1039
1040 clr_bit = 0xff << eint_offset;
1041 writel(clr_bit, pctl->eint_reg_base + clr_offset);
1042
1043 bit = ((dbnc << EINT_DBNC_SET_DBNC_BITS) | EINT_DBNC_SET_EN) <<
1044 eint_offset;
1045 rst = EINT_DBNC_RST_BIT << eint_offset;
1046 writel(rst | bit, pctl->eint_reg_base + set_offset);
1047
1048 /* Delay a while (more than 2T) to wait for hw debounce counter reset
1049 work correctly */
1050 udelay(1);
1051 if (unmask == 1)
1052 mtk_eint_unmask(d);
1053
1054 return 0;
1055 }
1056
1057 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned offset,
1058 unsigned long config)
1059 {
1060 u32 debounce;
1061
1062 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
1063 return -ENOTSUPP;
1064
1065 debounce = pinconf_to_config_argument(config);
1066 return mtk_gpio_set_debounce(chip, offset, debounce);
1067 }
1068
1069 static const struct gpio_chip mtk_gpio_chip = {
1070 .owner = THIS_MODULE,
1071 .request = gpiochip_generic_request,
1072 .free = gpiochip_generic_free,
1073 .get_direction = mtk_gpio_get_direction,
1074 .direction_input = mtk_gpio_direction_input,
1075 .direction_output = mtk_gpio_direction_output,
1076 .get = mtk_gpio_get,
1077 .set = mtk_gpio_set,
1078 .to_irq = mtk_gpio_to_irq,
1079 .set_config = mtk_gpio_set_config,
1080 .of_gpio_n_cells = 2,
1081 };
1082
1083 static int mtk_eint_set_type(struct irq_data *d,
1084 unsigned int type)
1085 {
1086 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
1087 const struct mtk_eint_offsets *eint_offsets =
1088 &pctl->devdata->eint_offsets;
1089 u32 mask = BIT(d->hwirq & 0x1f);
1090 void __iomem *reg;
1091
1092 if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) ||
1093 ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) {
1094 dev_err(pctl->dev, "Can't configure IRQ%d (EINT%lu) for type 0x%X\n",
1095 d->irq, d->hwirq, type);
1096 return -EINVAL;
1097 }
1098
1099 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1100 pctl->eint_dual_edges[d->hwirq] = 1;
1101 else
1102 pctl->eint_dual_edges[d->hwirq] = 0;
1103
1104 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) {
1105 reg = mtk_eint_get_offset(pctl, d->hwirq,
1106 eint_offsets->pol_clr);
1107 writel(mask, reg);
1108 } else {
1109 reg = mtk_eint_get_offset(pctl, d->hwirq,
1110 eint_offsets->pol_set);
1111 writel(mask, reg);
1112 }
1113
1114 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
1115 reg = mtk_eint_get_offset(pctl, d->hwirq,
1116 eint_offsets->sens_clr);
1117 writel(mask, reg);
1118 } else {
1119 reg = mtk_eint_get_offset(pctl, d->hwirq,
1120 eint_offsets->sens_set);
1121 writel(mask, reg);
1122 }
1123
1124 if (pctl->eint_dual_edges[d->hwirq])
1125 mtk_eint_flip_edge(pctl, d->hwirq);
1126
1127 return 0;
1128 }
1129
1130 static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on)
1131 {
1132 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
1133 int shift = d->hwirq & 0x1f;
1134 int reg = d->hwirq >> 5;
1135
1136 if (on)
1137 pctl->wake_mask[reg] |= BIT(shift);
1138 else
1139 pctl->wake_mask[reg] &= ~BIT(shift);
1140
1141 return 0;
1142 }
1143
1144 static void mtk_eint_chip_write_mask(const struct mtk_eint_offsets *chip,
1145 void __iomem *eint_reg_base, u32 *buf)
1146 {
1147 int port;
1148 void __iomem *reg;
1149
1150 for (port = 0; port < chip->ports; port++) {
1151 reg = eint_reg_base + (port << 2);
1152 writel_relaxed(~buf[port], reg + chip->mask_set);
1153 writel_relaxed(buf[port], reg + chip->mask_clr);
1154 }
1155 }
1156
1157 static void mtk_eint_chip_read_mask(const struct mtk_eint_offsets *chip,
1158 void __iomem *eint_reg_base, u32 *buf)
1159 {
1160 int port;
1161 void __iomem *reg;
1162
1163 for (port = 0; port < chip->ports; port++) {
1164 reg = eint_reg_base + chip->mask + (port << 2);
1165 buf[port] = ~readl_relaxed(reg);
1166 /* Mask is 0 when irq is enabled, and 1 when disabled. */
1167 }
1168 }
1169
1170 static int mtk_eint_suspend(struct device *device)
1171 {
1172 void __iomem *reg;
1173 struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1174 const struct mtk_eint_offsets *eint_offsets =
1175 &pctl->devdata->eint_offsets;
1176
1177 reg = pctl->eint_reg_base;
1178 mtk_eint_chip_read_mask(eint_offsets, reg, pctl->cur_mask);
1179 mtk_eint_chip_write_mask(eint_offsets, reg, pctl->wake_mask);
1180
1181 return 0;
1182 }
1183
1184 static int mtk_eint_resume(struct device *device)
1185 {
1186 struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1187 const struct mtk_eint_offsets *eint_offsets =
1188 &pctl->devdata->eint_offsets;
1189
1190 mtk_eint_chip_write_mask(eint_offsets,
1191 pctl->eint_reg_base, pctl->cur_mask);
1192
1193 return 0;
1194 }
1195
1196 const struct dev_pm_ops mtk_eint_pm_ops = {
1197 .suspend_noirq = mtk_eint_suspend,
1198 .resume_noirq = mtk_eint_resume,
1199 };
1200
1201 static void mtk_eint_ack(struct irq_data *d)
1202 {
1203 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
1204 const struct mtk_eint_offsets *eint_offsets =
1205 &pctl->devdata->eint_offsets;
1206 u32 mask = BIT(d->hwirq & 0x1f);
1207 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
1208 eint_offsets->ack);
1209
1210 writel(mask, reg);
1211 }
1212
1213 static struct irq_chip mtk_pinctrl_irq_chip = {
1214 .name = "mt-eint",
1215 .irq_disable = mtk_eint_mask,
1216 .irq_mask = mtk_eint_mask,
1217 .irq_unmask = mtk_eint_unmask,
1218 .irq_ack = mtk_eint_ack,
1219 .irq_set_type = mtk_eint_set_type,
1220 .irq_set_wake = mtk_eint_irq_set_wake,
1221 .irq_request_resources = mtk_pinctrl_irq_request_resources,
1222 .irq_release_resources = mtk_pinctrl_irq_release_resources,
1223 };
1224
1225 static unsigned int mtk_eint_init(struct mtk_pinctrl *pctl)
1226 {
1227 const struct mtk_eint_offsets *eint_offsets =
1228 &pctl->devdata->eint_offsets;
1229 void __iomem *reg = pctl->eint_reg_base + eint_offsets->dom_en;
1230 unsigned int i;
1231
1232 for (i = 0; i < pctl->devdata->ap_num; i += 32) {
1233 writel(0xffffffff, reg);
1234 reg += 4;
1235 }
1236 return 0;
1237 }
1238
1239 static inline void
1240 mtk_eint_debounce_process(struct mtk_pinctrl *pctl, int index)
1241 {
1242 unsigned int rst, ctrl_offset;
1243 unsigned int bit, dbnc;
1244 const struct mtk_eint_offsets *eint_offsets =
1245 &pctl->devdata->eint_offsets;
1246
1247 ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_ctrl;
1248 dbnc = readl(pctl->eint_reg_base + ctrl_offset);
1249 bit = EINT_DBNC_SET_EN << ((index % 4) * 8);
1250 if ((bit & dbnc) > 0) {
1251 ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_set;
1252 rst = EINT_DBNC_RST_BIT << ((index % 4) * 8);
1253 writel(rst, pctl->eint_reg_base + ctrl_offset);
1254 }
1255 }
1256
1257 static void mtk_eint_irq_handler(struct irq_desc *desc)
1258 {
1259 struct irq_chip *chip = irq_desc_get_chip(desc);
1260 struct mtk_pinctrl *pctl = irq_desc_get_handler_data(desc);
1261 unsigned int status, eint_num;
1262 int offset, index, virq;
1263 const struct mtk_eint_offsets *eint_offsets =
1264 &pctl->devdata->eint_offsets;
1265 void __iomem *reg = mtk_eint_get_offset(pctl, 0, eint_offsets->stat);
1266 int dual_edges, start_level, curr_level;
1267 const struct mtk_desc_pin *pin;
1268
1269 chained_irq_enter(chip, desc);
1270 for (eint_num = 0;
1271 eint_num < pctl->devdata->ap_num;
1272 eint_num += 32, reg += 4) {
1273 status = readl(reg);
1274 while (status) {
1275 offset = __ffs(status);
1276 index = eint_num + offset;
1277 virq = irq_find_mapping(pctl->domain, index);
1278 status &= ~BIT(offset);
1279
1280 dual_edges = pctl->eint_dual_edges[index];
1281 if (dual_edges) {
1282 /* Clear soft-irq in case we raised it
1283 last time */
1284 writel(BIT(offset), reg - eint_offsets->stat +
1285 eint_offsets->soft_clr);
1286
1287 pin = mtk_find_pin_by_eint_num(pctl, index);
1288 start_level = mtk_gpio_get(pctl->chip,
1289 pin->pin.number);
1290 }
1291
1292 generic_handle_irq(virq);
1293
1294 if (dual_edges) {
1295 curr_level = mtk_eint_flip_edge(pctl, index);
1296
1297 /* If level changed, we might lost one edge
1298 interrupt, raised it through soft-irq */
1299 if (start_level != curr_level)
1300 writel(BIT(offset), reg -
1301 eint_offsets->stat +
1302 eint_offsets->soft_set);
1303 }
1304
1305 if (index < pctl->devdata->db_cnt)
1306 mtk_eint_debounce_process(pctl , index);
1307 }
1308 }
1309 chained_irq_exit(chip, desc);
1310 }
1311
1312 static int mtk_pctrl_build_state(struct platform_device *pdev)
1313 {
1314 struct mtk_pinctrl *pctl = platform_get_drvdata(pdev);
1315 int i;
1316
1317 pctl->ngroups = pctl->devdata->npins;
1318
1319 /* Allocate groups */
1320 pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups,
1321 sizeof(*pctl->groups), GFP_KERNEL);
1322 if (!pctl->groups)
1323 return -ENOMEM;
1324
1325 /* We assume that one pin is one group, use pin name as group name. */
1326 pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups,
1327 sizeof(*pctl->grp_names), GFP_KERNEL);
1328 if (!pctl->grp_names)
1329 return -ENOMEM;
1330
1331 for (i = 0; i < pctl->devdata->npins; i++) {
1332 const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
1333 struct mtk_pinctrl_group *group = pctl->groups + i;
1334
1335 group->name = pin->pin.name;
1336 group->pin = pin->pin.number;
1337
1338 pctl->grp_names[i] = pin->pin.name;
1339 }
1340
1341 return 0;
1342 }
1343
1344 int mtk_pctrl_init(struct platform_device *pdev,
1345 const struct mtk_pinctrl_devdata *data,
1346 struct regmap *regmap)
1347 {
1348 struct pinctrl_pin_desc *pins;
1349 struct mtk_pinctrl *pctl;
1350 struct device_node *np = pdev->dev.of_node, *node;
1351 struct property *prop;
1352 struct resource *res;
1353 int i, ret, irq, ports_buf;
1354
1355 pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
1356 if (!pctl)
1357 return -ENOMEM;
1358
1359 platform_set_drvdata(pdev, pctl);
1360
1361 prop = of_find_property(np, "pins-are-numbered", NULL);
1362 if (!prop) {
1363 dev_err(&pdev->dev, "only support pins-are-numbered format\n");
1364 return -EINVAL;
1365 }
1366
1367 node = of_parse_phandle(np, "mediatek,pctl-regmap", 0);
1368 if (node) {
1369 pctl->regmap1 = syscon_node_to_regmap(node);
1370 if (IS_ERR(pctl->regmap1))
1371 return PTR_ERR(pctl->regmap1);
1372 } else if (regmap) {
1373 pctl->regmap1 = regmap;
1374 } else {
1375 dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n");
1376 return -EINVAL;
1377 }
1378
1379 /* Only 8135 has two base addr, other SoCs have only one. */
1380 node = of_parse_phandle(np, "mediatek,pctl-regmap", 1);
1381 if (node) {
1382 pctl->regmap2 = syscon_node_to_regmap(node);
1383 if (IS_ERR(pctl->regmap2))
1384 return PTR_ERR(pctl->regmap2);
1385 }
1386
1387 pctl->devdata = data;
1388 ret = mtk_pctrl_build_state(pdev);
1389 if (ret) {
1390 dev_err(&pdev->dev, "build state failed: %d\n", ret);
1391 return -EINVAL;
1392 }
1393
1394 pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins),
1395 GFP_KERNEL);
1396 if (!pins)
1397 return -ENOMEM;
1398
1399 for (i = 0; i < pctl->devdata->npins; i++)
1400 pins[i] = pctl->devdata->pins[i].pin;
1401
1402 pctl->pctl_desc.name = dev_name(&pdev->dev);
1403 pctl->pctl_desc.owner = THIS_MODULE;
1404 pctl->pctl_desc.pins = pins;
1405 pctl->pctl_desc.npins = pctl->devdata->npins;
1406 pctl->pctl_desc.confops = &mtk_pconf_ops;
1407 pctl->pctl_desc.pctlops = &mtk_pctrl_ops;
1408 pctl->pctl_desc.pmxops = &mtk_pmx_ops;
1409 pctl->dev = &pdev->dev;
1410
1411 pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc,
1412 pctl);
1413 if (IS_ERR(pctl->pctl_dev)) {
1414 dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
1415 return PTR_ERR(pctl->pctl_dev);
1416 }
1417
1418 pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
1419 if (!pctl->chip)
1420 return -ENOMEM;
1421
1422 *pctl->chip = mtk_gpio_chip;
1423 pctl->chip->ngpio = pctl->devdata->npins;
1424 pctl->chip->label = dev_name(&pdev->dev);
1425 pctl->chip->parent = &pdev->dev;
1426 pctl->chip->base = -1;
1427
1428 ret = gpiochip_add_data(pctl->chip, pctl);
1429 if (ret)
1430 return -EINVAL;
1431
1432 /* Register the GPIO to pin mappings. */
1433 ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
1434 0, 0, pctl->devdata->npins);
1435 if (ret) {
1436 ret = -EINVAL;
1437 goto chip_error;
1438 }
1439
1440 if (!of_property_read_bool(np, "interrupt-controller"))
1441 return 0;
1442
1443 /* Get EINT register base from dts. */
1444 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1445 if (!res) {
1446 dev_err(&pdev->dev, "Unable to get Pinctrl resource\n");
1447 ret = -EINVAL;
1448 goto chip_error;
1449 }
1450
1451 pctl->eint_reg_base = devm_ioremap_resource(&pdev->dev, res);
1452 if (IS_ERR(pctl->eint_reg_base)) {
1453 ret = -EINVAL;
1454 goto chip_error;
1455 }
1456
1457 ports_buf = pctl->devdata->eint_offsets.ports;
1458 pctl->wake_mask = devm_kcalloc(&pdev->dev, ports_buf,
1459 sizeof(*pctl->wake_mask), GFP_KERNEL);
1460 if (!pctl->wake_mask) {
1461 ret = -ENOMEM;
1462 goto chip_error;
1463 }
1464
1465 pctl->cur_mask = devm_kcalloc(&pdev->dev, ports_buf,
1466 sizeof(*pctl->cur_mask), GFP_KERNEL);
1467 if (!pctl->cur_mask) {
1468 ret = -ENOMEM;
1469 goto chip_error;
1470 }
1471
1472 pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num,
1473 sizeof(int), GFP_KERNEL);
1474 if (!pctl->eint_dual_edges) {
1475 ret = -ENOMEM;
1476 goto chip_error;
1477 }
1478
1479 irq = irq_of_parse_and_map(np, 0);
1480 if (!irq) {
1481 dev_err(&pdev->dev, "couldn't parse and map irq\n");
1482 ret = -EINVAL;
1483 goto chip_error;
1484 }
1485
1486 pctl->domain = irq_domain_add_linear(np,
1487 pctl->devdata->ap_num, &irq_domain_simple_ops, NULL);
1488 if (!pctl->domain) {
1489 dev_err(&pdev->dev, "Couldn't register IRQ domain\n");
1490 ret = -ENOMEM;
1491 goto chip_error;
1492 }
1493
1494 mtk_eint_init(pctl);
1495 for (i = 0; i < pctl->devdata->ap_num; i++) {
1496 int virq = irq_create_mapping(pctl->domain, i);
1497
1498 irq_set_chip_and_handler(virq, &mtk_pinctrl_irq_chip,
1499 handle_level_irq);
1500 irq_set_chip_data(virq, pctl);
1501 }
1502
1503 irq_set_chained_handler_and_data(irq, mtk_eint_irq_handler, pctl);
1504 return 0;
1505
1506 chip_error:
1507 gpiochip_remove(pctl->chip);
1508 return ret;
1509 }
Linux with added FPC-III support