2 * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver.
3 * Copyright (c) 2014 MediaTek Inc.
4 * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com>
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.
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.
17 #include <linux/gpio.h>
18 #include <linux/module.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 <dt-bindings/pinctrl/mt65xx.h>
39 #include "../pinconf.h"
40 #include "../pinctrl-utils.h"
41 #include "pinctrl-mtk-common.h"
43 #define MAX_GPIO_MODE_PER_REG 5
44 #define GPIO_MODE_BITS 3
46 static const char * const mtk_gpio_functions[] = {
47 "func0", "func1", "func2", "func3",
48 "func4", "func5", "func6", "func7",
52 * There are two base address for pull related configuration
53 * in mt8135, and different GPIO pins use different base address.
54 * When pin number greater than type1_start and less than type1_end,
55 * should use the second base address.
57 static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl,
60 if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end)
65 static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin)
67 /* Different SoC has different mask and port shift. */
68 return ((pin >> 4) & pctl->devdata->port_mask)
69 << pctl->devdata->port_shf;
72 static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
73 struct pinctrl_gpio_range *range, unsigned offset,
76 unsigned int reg_addr;
78 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
80 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
81 bit = BIT(offset & 0xf);
84 /* Different SoC has different alignment offset. */
85 reg_addr = CLR_ADDR(reg_addr, pctl);
87 reg_addr = SET_ADDR(reg_addr, pctl);
89 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
93 static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
95 unsigned int reg_addr;
97 struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
99 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset;
100 bit = BIT(offset & 0xf);
103 reg_addr = SET_ADDR(reg_addr, pctl);
105 reg_addr = CLR_ADDR(reg_addr, pctl);
107 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
110 static void mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin,
111 int value, enum pin_config_param param)
113 unsigned int reg_addr, offset;
118 * Due to some pins are irregular, their input enable and smt
119 * control register are discontinuous, but they are mapping together.
120 * So we need this special handle.
122 if (pctl->devdata->spec_ies_smt_set) {
123 ret = pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin),
124 pin, pctl->devdata->port_align, value);
129 bit = BIT(pin & 0xf);
131 if (param == PIN_CONFIG_INPUT_ENABLE)
132 offset = pctl->devdata->ies_offset;
134 offset = pctl->devdata->smt_offset;
137 reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
139 reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
141 regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit);
144 static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin(
145 struct mtk_pinctrl *pctl, unsigned long pin) {
148 for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) {
149 const struct mtk_pin_drv_grp *pin_drv =
150 pctl->devdata->pin_drv_grp + i;
151 if (pin == pin_drv->pin)
158 static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl,
159 unsigned int pin, unsigned char driving)
161 const struct mtk_pin_drv_grp *pin_drv;
163 unsigned int bits, mask, shift;
164 const struct mtk_drv_group_desc *drv_grp;
166 if (pin >= pctl->devdata->npins)
169 pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin);
170 if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls)
173 drv_grp = pctl->devdata->grp_desc + pin_drv->grp;
174 if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv
175 && !(driving % drv_grp->step)) {
176 val = driving / drv_grp->step - 1;
177 bits = drv_grp->high_bit - drv_grp->low_bit + 1;
178 mask = BIT(bits) - 1;
179 shift = pin_drv->bit + drv_grp->low_bit;
182 return regmap_update_bits(mtk_get_regmap(pctl, pin),
183 pin_drv->offset, mask, val);
189 static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
190 unsigned int pin, bool enable, bool isup, unsigned int arg)
193 unsigned int reg_pullen, reg_pullsel;
196 /* Some pins' pull setting are very different,
197 * they have separate pull up/down bit, R0 and R1
198 * resistor bit, so we need this special handle.
200 if (pctl->devdata->spec_pull_set) {
201 ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
202 pin, pctl->devdata->port_align, isup, arg);
207 /* For generic pull config, default arg value should be 0 or 1. */
208 if (arg != 0 && arg != 1) {
209 dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n",
214 bit = BIT(pin & 0xf);
216 reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) +
217 pctl->devdata->pullen_offset, pctl);
219 reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) +
220 pctl->devdata->pullen_offset, pctl);
223 reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) +
224 pctl->devdata->pullsel_offset, pctl);
226 reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) +
227 pctl->devdata->pullsel_offset, pctl);
229 regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit);
230 regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit);
234 static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
235 unsigned int pin, enum pin_config_param param,
236 enum pin_config_param arg)
238 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
241 case PIN_CONFIG_BIAS_DISABLE:
242 mtk_pconf_set_pull_select(pctl, pin, false, false, arg);
244 case PIN_CONFIG_BIAS_PULL_UP:
245 mtk_pconf_set_pull_select(pctl, pin, true, true, arg);
247 case PIN_CONFIG_BIAS_PULL_DOWN:
248 mtk_pconf_set_pull_select(pctl, pin, true, false, arg);
250 case PIN_CONFIG_INPUT_ENABLE:
251 mtk_pconf_set_ies_smt(pctl, pin, arg, param);
253 case PIN_CONFIG_OUTPUT:
254 mtk_gpio_set(pctl->chip, pin, arg);
255 mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false);
257 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
258 mtk_pconf_set_ies_smt(pctl, pin, arg, param);
260 case PIN_CONFIG_DRIVE_STRENGTH:
261 mtk_pconf_set_driving(pctl, pin, arg);
270 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev,
272 unsigned long *config)
274 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
276 *config = pctl->groups[group].config;
281 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
282 unsigned long *configs, unsigned num_configs)
284 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
285 struct mtk_pinctrl_group *g = &pctl->groups[group];
288 for (i = 0; i < num_configs; i++) {
289 mtk_pconf_parse_conf(pctldev, g->pin,
290 pinconf_to_config_param(configs[i]),
291 pinconf_to_config_argument(configs[i]));
293 g->config = configs[i];
299 static const struct pinconf_ops mtk_pconf_ops = {
300 .pin_config_group_get = mtk_pconf_group_get,
301 .pin_config_group_set = mtk_pconf_group_set,
304 static struct mtk_pinctrl_group *
305 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin)
309 for (i = 0; i < pctl->ngroups; i++) {
310 struct mtk_pinctrl_group *grp = pctl->groups + i;
319 static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin(
320 struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum)
322 const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num;
323 const struct mtk_desc_function *func = pin->functions;
325 while (func && func->name) {
326 if (func->muxval == fnum)
334 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl,
335 u32 pin_num, u32 fnum)
339 for (i = 0; i < pctl->devdata->npins; i++) {
340 const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
342 if (pin->pin.number == pin_num) {
343 const struct mtk_desc_function *func =
346 while (func && func->name) {
347 if (func->muxval == fnum)
359 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
360 u32 pin, u32 fnum, struct mtk_pinctrl_group *grp,
361 struct pinctrl_map **map, unsigned *reserved_maps,
366 if (*num_maps == *reserved_maps)
369 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
370 (*map)[*num_maps].data.mux.group = grp->name;
372 ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
374 dev_err(pctl->dev, "invalid function %d on pin %d .\n",
379 (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
385 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
386 struct device_node *node,
387 struct pinctrl_map **map,
388 unsigned *reserved_maps,
391 struct property *pins;
392 u32 pinfunc, pin, func;
393 int num_pins, num_funcs, maps_per_pin;
394 unsigned long *configs;
395 unsigned int num_configs;
398 unsigned reserve = 0;
399 struct mtk_pinctrl_group *grp;
400 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
402 pins = of_find_property(node, "pinmux", NULL);
404 dev_err(pctl->dev, "missing pins property in node %s .\n",
409 err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
414 num_pins = pins->length / sizeof(u32);
415 num_funcs = num_pins;
419 if (has_config && num_pins >= 1)
422 if (!num_pins || !maps_per_pin)
425 reserve = num_pins * maps_per_pin;
427 err = pinctrl_utils_reserve_map(pctldev, map,
428 reserved_maps, num_maps, reserve);
432 for (i = 0; i < num_pins; i++) {
433 err = of_property_read_u32_index(node, "pinmux",
438 pin = MTK_GET_PIN_NO(pinfunc);
439 func = MTK_GET_PIN_FUNC(pinfunc);
441 if (pin >= pctl->devdata->npins ||
442 func >= ARRAY_SIZE(mtk_gpio_functions)) {
443 dev_err(pctl->dev, "invalid pins value.\n");
448 grp = mtk_pctrl_find_group_by_pin(pctl, pin);
450 dev_err(pctl->dev, "unable to match pin %d to group\n",
455 err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
456 reserved_maps, num_maps);
461 err = pinctrl_utils_add_map_configs(pctldev, map,
462 reserved_maps, num_maps, grp->name,
463 configs, num_configs,
464 PIN_MAP_TYPE_CONFIGS_GROUP);
476 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
477 struct device_node *np_config,
478 struct pinctrl_map **map, unsigned *num_maps)
480 struct device_node *np;
481 unsigned reserved_maps;
488 for_each_child_of_node(np_config, np) {
489 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
490 &reserved_maps, num_maps);
492 pinctrl_utils_dt_free_map(pctldev, *map, *num_maps);
500 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
502 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
504 return pctl->ngroups;
507 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
510 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
512 return pctl->groups[group].name;
515 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
517 const unsigned **pins,
520 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
522 *pins = (unsigned *)&pctl->groups[group].pin;
528 static const struct pinctrl_ops mtk_pctrl_ops = {
529 .dt_node_to_map = mtk_pctrl_dt_node_to_map,
530 .dt_free_map = pinctrl_utils_dt_free_map,
531 .get_groups_count = mtk_pctrl_get_groups_count,
532 .get_group_name = mtk_pctrl_get_group_name,
533 .get_group_pins = mtk_pctrl_get_group_pins,
536 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
538 return ARRAY_SIZE(mtk_gpio_functions);
541 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
544 return mtk_gpio_functions[selector];
547 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
549 const char * const **groups,
550 unsigned * const num_groups)
552 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
554 *groups = pctl->grp_names;
555 *num_groups = pctl->ngroups;
560 static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev,
561 unsigned long pin, unsigned long mode)
563 unsigned int reg_addr;
566 unsigned int mask = (1L << GPIO_MODE_BITS) - 1;
567 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
569 reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf)
570 + pctl->devdata->pinmux_offset;
572 bit = pin % MAX_GPIO_MODE_PER_REG;
573 mask <<= (GPIO_MODE_BITS * bit);
574 val = (mode << (GPIO_MODE_BITS * bit));
575 return regmap_update_bits(mtk_get_regmap(pctl, pin),
576 reg_addr, mask, val);
579 static const struct mtk_desc_pin *
580 mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num)
583 const struct mtk_desc_pin *pin;
585 for (i = 0; i < pctl->devdata->npins; i++) {
586 pin = pctl->devdata->pins + i;
587 if (pin->eint.eintnum == eint_num)
594 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
599 const struct mtk_desc_function *desc;
600 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
601 struct mtk_pinctrl_group *g = pctl->groups + group;
603 ret = mtk_pctrl_is_function_valid(pctl, g->pin, function);
605 dev_err(pctl->dev, "invaild function %d on group %d .\n",
610 desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function);
613 mtk_pmx_set_mode(pctldev, g->pin, desc->muxval);
617 static const struct pinmux_ops mtk_pmx_ops = {
618 .get_functions_count = mtk_pmx_get_funcs_cnt,
619 .get_function_name = mtk_pmx_get_func_name,
620 .get_function_groups = mtk_pmx_get_func_groups,
621 .set_mux = mtk_pmx_set_mux,
622 .gpio_set_direction = mtk_pmx_gpio_set_direction,
625 static int mtk_gpio_request(struct gpio_chip *chip, unsigned offset)
627 return pinctrl_request_gpio(chip->base + offset);
630 static void mtk_gpio_free(struct gpio_chip *chip, unsigned offset)
632 pinctrl_free_gpio(chip->base + offset);
635 static int mtk_gpio_direction_input(struct gpio_chip *chip,
638 return pinctrl_gpio_direction_input(chip->base + offset);
641 static int mtk_gpio_direction_output(struct gpio_chip *chip,
642 unsigned offset, int value)
644 mtk_gpio_set(chip, offset, value);
645 return pinctrl_gpio_direction_output(chip->base + offset);
648 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
650 unsigned int reg_addr;
652 unsigned int read_val = 0;
654 struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
656 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
657 bit = BIT(offset & 0xf);
658 regmap_read(pctl->regmap1, reg_addr, &read_val);
659 return !!(read_val & bit);
662 static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset)
664 unsigned int reg_addr;
666 unsigned int read_val = 0;
667 struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
669 if (mtk_gpio_get_direction(chip, offset))
670 reg_addr = mtk_get_port(pctl, offset) +
671 pctl->devdata->dout_offset;
673 reg_addr = mtk_get_port(pctl, offset) +
674 pctl->devdata->din_offset;
676 bit = BIT(offset & 0xf);
677 regmap_read(pctl->regmap1, reg_addr, &read_val);
678 return !!(read_val & bit);
681 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
683 const struct mtk_desc_pin *pin;
684 struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
687 pin = pctl->devdata->pins + offset;
688 if (pin->eint.eintnum == NO_EINT_SUPPORT)
691 irq = irq_find_mapping(pctl->domain, pin->eint.eintnum);
698 static int mtk_pinctrl_irq_request_resources(struct irq_data *d)
700 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
701 const struct mtk_desc_pin *pin;
704 pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
707 dev_err(pctl->dev, "Can not find pin\n");
711 ret = gpiochip_lock_as_irq(pctl->chip, pin->pin.number);
713 dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
718 /* set mux to INT mode */
719 mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux);
724 static void mtk_pinctrl_irq_release_resources(struct irq_data *d)
726 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
727 const struct mtk_desc_pin *pin;
729 pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
732 dev_err(pctl->dev, "Can not find pin\n");
736 gpiochip_unlock_as_irq(pctl->chip, pin->pin.number);
739 static void __iomem *mtk_eint_get_offset(struct mtk_pinctrl *pctl,
740 unsigned int eint_num, unsigned int offset)
742 unsigned int eint_base = 0;
745 if (eint_num >= pctl->devdata->ap_num)
746 eint_base = pctl->devdata->ap_num;
748 reg = pctl->eint_reg_base + offset + ((eint_num - eint_base) / 32) * 4;
754 * mtk_can_en_debounce: Check the EINT number is able to enable debounce or not
755 * @eint_num: the EINT number to setmtk_pinctrl
757 static unsigned int mtk_eint_can_en_debounce(struct mtk_pinctrl *pctl,
758 unsigned int eint_num)
761 unsigned int bit = BIT(eint_num % 32);
762 const struct mtk_eint_offsets *eint_offsets =
763 &pctl->devdata->eint_offsets;
765 void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
768 if (readl(reg) & bit)
769 sens = MT_LEVEL_SENSITIVE;
771 sens = MT_EDGE_SENSITIVE;
773 if ((eint_num < pctl->devdata->db_cnt) && (sens != MT_EDGE_SENSITIVE))
780 * mtk_eint_get_mask: To get the eint mask
781 * @eint_num: the EINT number to get
783 static unsigned int mtk_eint_get_mask(struct mtk_pinctrl *pctl,
784 unsigned int eint_num)
786 unsigned int bit = BIT(eint_num % 32);
787 const struct mtk_eint_offsets *eint_offsets =
788 &pctl->devdata->eint_offsets;
790 void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
793 return !!(readl(reg) & bit);
796 static int mtk_eint_flip_edge(struct mtk_pinctrl *pctl, int hwirq)
798 int start_level, curr_level;
799 unsigned int reg_offset;
800 const struct mtk_eint_offsets *eint_offsets = &(pctl->devdata->eint_offsets);
801 u32 mask = 1 << (hwirq & 0x1f);
802 u32 port = (hwirq >> 5) & eint_offsets->port_mask;
803 void __iomem *reg = pctl->eint_reg_base + (port << 2);
804 const struct mtk_desc_pin *pin;
806 pin = mtk_find_pin_by_eint_num(pctl, hwirq);
807 curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
809 start_level = curr_level;
811 reg_offset = eint_offsets->pol_clr;
813 reg_offset = eint_offsets->pol_set;
814 writel(mask, reg + reg_offset);
816 curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
817 } while (start_level != curr_level);
822 static void mtk_eint_mask(struct irq_data *d)
824 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
825 const struct mtk_eint_offsets *eint_offsets =
826 &pctl->devdata->eint_offsets;
827 u32 mask = BIT(d->hwirq & 0x1f);
828 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
829 eint_offsets->mask_set);
834 static void mtk_eint_unmask(struct irq_data *d)
836 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
837 const struct mtk_eint_offsets *eint_offsets =
838 &pctl->devdata->eint_offsets;
839 u32 mask = BIT(d->hwirq & 0x1f);
840 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
841 eint_offsets->mask_clr);
845 if (pctl->eint_dual_edges[d->hwirq])
846 mtk_eint_flip_edge(pctl, d->hwirq);
849 static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
852 struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
853 int eint_num, virq, eint_offset;
854 unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc;
855 static const unsigned int dbnc_arr[] = {0 , 1, 16, 32, 64, 128, 256};
856 const struct mtk_desc_pin *pin;
859 pin = pctl->devdata->pins + offset;
860 if (pin->eint.eintnum == NO_EINT_SUPPORT)
863 eint_num = pin->eint.eintnum;
864 virq = irq_find_mapping(pctl->domain, eint_num);
865 eint_offset = (eint_num % 4) * 8;
866 d = irq_get_irq_data(virq);
868 set_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_set;
869 clr_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_clr;
870 if (!mtk_eint_can_en_debounce(pctl, eint_num))
873 dbnc = ARRAY_SIZE(dbnc_arr);
874 for (i = 0; i < ARRAY_SIZE(dbnc_arr); i++) {
875 if (debounce <= dbnc_arr[i]) {
881 if (!mtk_eint_get_mask(pctl, eint_num)) {
888 clr_bit = 0xff << eint_offset;
889 writel(clr_bit, pctl->eint_reg_base + clr_offset);
891 bit = ((dbnc << EINT_DBNC_SET_DBNC_BITS) | EINT_DBNC_SET_EN) <<
893 rst = EINT_DBNC_RST_BIT << eint_offset;
894 writel(rst | bit, pctl->eint_reg_base + set_offset);
896 /* Delay a while (more than 2T) to wait for hw debounce counter reset
905 static struct gpio_chip mtk_gpio_chip = {
906 .owner = THIS_MODULE,
907 .request = mtk_gpio_request,
908 .free = mtk_gpio_free,
909 .direction_input = mtk_gpio_direction_input,
910 .direction_output = mtk_gpio_direction_output,
913 .to_irq = mtk_gpio_to_irq,
914 .set_debounce = mtk_gpio_set_debounce,
915 .of_gpio_n_cells = 2,
918 static int mtk_eint_set_type(struct irq_data *d,
921 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
922 const struct mtk_eint_offsets *eint_offsets =
923 &pctl->devdata->eint_offsets;
924 u32 mask = BIT(d->hwirq & 0x1f);
927 if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) ||
928 ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) {
929 dev_err(pctl->dev, "Can't configure IRQ%d (EINT%lu) for type 0x%X\n",
930 d->irq, d->hwirq, type);
934 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
935 pctl->eint_dual_edges[d->hwirq] = 1;
937 pctl->eint_dual_edges[d->hwirq] = 0;
939 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) {
940 reg = mtk_eint_get_offset(pctl, d->hwirq,
941 eint_offsets->pol_clr);
944 reg = mtk_eint_get_offset(pctl, d->hwirq,
945 eint_offsets->pol_set);
949 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
950 reg = mtk_eint_get_offset(pctl, d->hwirq,
951 eint_offsets->sens_clr);
954 reg = mtk_eint_get_offset(pctl, d->hwirq,
955 eint_offsets->sens_set);
959 if (pctl->eint_dual_edges[d->hwirq])
960 mtk_eint_flip_edge(pctl, d->hwirq);
965 static void mtk_eint_ack(struct irq_data *d)
967 struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
968 const struct mtk_eint_offsets *eint_offsets =
969 &pctl->devdata->eint_offsets;
970 u32 mask = BIT(d->hwirq & 0x1f);
971 void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
977 static struct irq_chip mtk_pinctrl_irq_chip = {
979 .irq_mask = mtk_eint_mask,
980 .irq_unmask = mtk_eint_unmask,
981 .irq_ack = mtk_eint_ack,
982 .irq_set_type = mtk_eint_set_type,
983 .irq_request_resources = mtk_pinctrl_irq_request_resources,
984 .irq_release_resources = mtk_pinctrl_irq_release_resources,
987 static unsigned int mtk_eint_init(struct mtk_pinctrl *pctl)
989 const struct mtk_eint_offsets *eint_offsets =
990 &pctl->devdata->eint_offsets;
991 void __iomem *reg = pctl->eint_reg_base + eint_offsets->dom_en;
994 for (i = 0; i < pctl->devdata->ap_num; i += 32) {
995 writel(0xffffffff, reg);
1002 mtk_eint_debounce_process(struct mtk_pinctrl *pctl, int index)
1004 unsigned int rst, ctrl_offset;
1005 unsigned int bit, dbnc;
1006 const struct mtk_eint_offsets *eint_offsets =
1007 &pctl->devdata->eint_offsets;
1009 ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_ctrl;
1010 dbnc = readl(pctl->eint_reg_base + ctrl_offset);
1011 bit = EINT_DBNC_SET_EN << ((index % 4) * 8);
1012 if ((bit & dbnc) > 0) {
1013 ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_set;
1014 rst = EINT_DBNC_RST_BIT << ((index % 4) * 8);
1015 writel(rst, pctl->eint_reg_base + ctrl_offset);
1019 static void mtk_eint_irq_handler(unsigned irq, struct irq_desc *desc)
1021 struct irq_chip *chip = irq_get_chip(irq);
1022 struct mtk_pinctrl *pctl = irq_get_handler_data(irq);
1023 unsigned int status, eint_num;
1024 int offset, index, virq;
1025 const struct mtk_eint_offsets *eint_offsets =
1026 &pctl->devdata->eint_offsets;
1027 void __iomem *reg = mtk_eint_get_offset(pctl, 0, eint_offsets->stat);
1028 int dual_edges, start_level, curr_level;
1029 const struct mtk_desc_pin *pin;
1031 chained_irq_enter(chip, desc);
1032 for (eint_num = 0; eint_num < pctl->devdata->ap_num; eint_num += 32) {
1033 status = readl(reg);
1036 offset = __ffs(status);
1037 index = eint_num + offset;
1038 virq = irq_find_mapping(pctl->domain, index);
1039 status &= ~BIT(offset);
1041 dual_edges = pctl->eint_dual_edges[index];
1043 /* Clear soft-irq in case we raised it
1045 writel(BIT(offset), reg - eint_offsets->stat +
1046 eint_offsets->soft_clr);
1048 pin = mtk_find_pin_by_eint_num(pctl, index);
1049 start_level = mtk_gpio_get(pctl->chip,
1053 generic_handle_irq(virq);
1056 curr_level = mtk_eint_flip_edge(pctl, index);
1058 /* If level changed, we might lost one edge
1059 interrupt, raised it through soft-irq */
1060 if (start_level != curr_level)
1061 writel(BIT(offset), reg -
1062 eint_offsets->stat +
1063 eint_offsets->soft_set);
1066 if (index < pctl->devdata->db_cnt)
1067 mtk_eint_debounce_process(pctl , index);
1070 chained_irq_exit(chip, desc);
1073 static int mtk_pctrl_build_state(struct platform_device *pdev)
1075 struct mtk_pinctrl *pctl = platform_get_drvdata(pdev);
1078 pctl->ngroups = pctl->devdata->npins;
1080 /* Allocate groups */
1081 pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups,
1082 sizeof(*pctl->groups), GFP_KERNEL);
1086 /* We assume that one pin is one group, use pin name as group name. */
1087 pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups,
1088 sizeof(*pctl->grp_names), GFP_KERNEL);
1089 if (!pctl->grp_names)
1092 for (i = 0; i < pctl->devdata->npins; i++) {
1093 const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
1094 struct mtk_pinctrl_group *group = pctl->groups + i;
1096 group->name = pin->pin.name;
1097 group->pin = pin->pin.number;
1099 pctl->grp_names[i] = pin->pin.name;
1105 static struct pinctrl_desc mtk_pctrl_desc = {
1106 .confops = &mtk_pconf_ops,
1107 .pctlops = &mtk_pctrl_ops,
1108 .pmxops = &mtk_pmx_ops,
1111 int mtk_pctrl_init(struct platform_device *pdev,
1112 const struct mtk_pinctrl_devdata *data)
1114 struct pinctrl_pin_desc *pins;
1115 struct mtk_pinctrl *pctl;
1116 struct device_node *np = pdev->dev.of_node, *node;
1117 struct property *prop;
1118 struct resource *res;
1121 pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
1125 platform_set_drvdata(pdev, pctl);
1127 prop = of_find_property(np, "pins-are-numbered", NULL);
1129 dev_err(&pdev->dev, "only support pins-are-numbered format\n");
1133 node = of_parse_phandle(np, "mediatek,pctl-regmap", 0);
1135 pctl->regmap1 = syscon_node_to_regmap(node);
1136 if (IS_ERR(pctl->regmap1))
1137 return PTR_ERR(pctl->regmap1);
1140 /* Only 8135 has two base addr, other SoCs have only one. */
1141 node = of_parse_phandle(np, "mediatek,pctl-regmap", 1);
1143 pctl->regmap2 = syscon_node_to_regmap(node);
1144 if (IS_ERR(pctl->regmap2))
1145 return PTR_ERR(pctl->regmap2);
1148 pctl->devdata = data;
1149 ret = mtk_pctrl_build_state(pdev);
1151 dev_err(&pdev->dev, "build state failed: %d\n", ret);
1155 pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins),
1160 for (i = 0; i < pctl->devdata->npins; i++)
1161 pins[i] = pctl->devdata->pins[i].pin;
1162 mtk_pctrl_desc.name = dev_name(&pdev->dev);
1163 mtk_pctrl_desc.owner = THIS_MODULE;
1164 mtk_pctrl_desc.pins = pins;
1165 mtk_pctrl_desc.npins = pctl->devdata->npins;
1166 pctl->dev = &pdev->dev;
1167 pctl->pctl_dev = pinctrl_register(&mtk_pctrl_desc, &pdev->dev, pctl);
1168 if (!pctl->pctl_dev) {
1169 dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
1173 pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
1179 pctl->chip = &mtk_gpio_chip;
1180 pctl->chip->ngpio = pctl->devdata->npins;
1181 pctl->chip->label = dev_name(&pdev->dev);
1182 pctl->chip->dev = &pdev->dev;
1183 pctl->chip->base = 0;
1185 ret = gpiochip_add(pctl->chip);
1191 /* Register the GPIO to pin mappings. */
1192 ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
1193 0, 0, pctl->devdata->npins);
1199 /* Get EINT register base from dts. */
1200 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1202 dev_err(&pdev->dev, "Unable to get Pinctrl resource\n");
1207 pctl->eint_reg_base = devm_ioremap_resource(&pdev->dev, res);
1208 if (IS_ERR(pctl->eint_reg_base)) {
1213 pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num,
1214 sizeof(int), GFP_KERNEL);
1215 if (!pctl->eint_dual_edges) {
1220 irq = irq_of_parse_and_map(np, 0);
1222 dev_err(&pdev->dev, "couldn't parse and map irq\n");
1227 pctl->domain = irq_domain_add_linear(np,
1228 pctl->devdata->ap_num, &irq_domain_simple_ops, NULL);
1229 if (!pctl->domain) {
1230 dev_err(&pdev->dev, "Couldn't register IRQ domain\n");
1235 mtk_eint_init(pctl);
1236 for (i = 0; i < pctl->devdata->ap_num; i++) {
1237 int virq = irq_create_mapping(pctl->domain, i);
1239 irq_set_chip_and_handler(virq, &mtk_pinctrl_irq_chip,
1241 irq_set_chip_data(virq, pctl);
1242 set_irq_flags(virq, IRQF_VALID);
1245 irq_set_chained_handler(irq, mtk_eint_irq_handler);
1246 irq_set_handler_data(irq, pctl);
1247 set_irq_flags(irq, IRQF_VALID);
1251 gpiochip_remove(pctl->chip);
1253 pinctrl_unregister(pctl->pctl_dev);
1257 MODULE_LICENSE("GPL");
1258 MODULE_DESCRIPTION("MediaTek Pinctrl Driver");
1259 MODULE_AUTHOR("Hongzhou Yang <hongzhou.yang@mediatek.com>");