1 // SPDX-License-Identifier: GPL-2.0-only
3  * Spreadtrum pin controller driver
4  * Copyright (C) 2017 Spreadtrum  - http://www.spreadtrum.com
20 #include <linux/pinctrl/pinconf-generic.h>
28 #include "../pinctrl-utils.h"
29 #include "pinctrl-sprd.h"
99  * struct sprd_pin: represent one pin's description
100  * @name: pin name
101  * @number: pin number
102  * @type: pin type, can be GLOBAL_CTRL_PIN/COMMON_PIN/MISC_PIN
103  * @reg: pin register address
104  * @bit_offset: bit offset in pin register
105  * @bit_width: bit width in pin register
119  * @npins: pin numbers of this group
133  * @npins: pin numbers of the whole SoC
145  * struct sprd_pinctrl: represent the pin controller device
164 	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;  in sprd_pinctrl_get_id_by_name()
167 	for (i = 0; i < info->npins; i++) {  in sprd_pinctrl_get_id_by_name()
168 		if (!strcmp(info->pins[i].name, name))  in sprd_pinctrl_get_id_by_name()
169 			return info->pins[i].number;  in sprd_pinctrl_get_id_by_name()
172 	return -ENODEV;  in sprd_pinctrl_get_id_by_name()
178 	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;  in sprd_pinctrl_get_pin_by_id()
179 	struct sprd_pin *pin = NULL;  in sprd_pinctrl_get_pin_by_id()  local
182 	for (i = 0; i < info->npins; i++) {  in sprd_pinctrl_get_pin_by_id()
183 		if (info->pins[i].number == id) {  in sprd_pinctrl_get_pin_by_id()
184 			pin = &info->pins[i];  in sprd_pinctrl_get_pin_by_id()
189 	return pin;  in sprd_pinctrl_get_pin_by_id()
196 	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;  in sprd_pinctrl_find_group_by_name()
200 	for (i = 0; i < info->ngroups; i++) {  in sprd_pinctrl_find_group_by_name()
201 		if (!strcmp(info->groups[i].name, name)) {  in sprd_pinctrl_find_group_by_name()
202 			grp = &info->groups[i];  in sprd_pinctrl_find_group_by_name()
213 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pctrl_group_count()
215 	return info->ngroups;  in sprd_pctrl_group_count()
222 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pctrl_group_name()
224 	return info->groups[selector].name;  in sprd_pctrl_group_name()
233 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pctrl_group_pins()
235 	if (selector >= info->ngroups)  in sprd_pctrl_group_pins()
236 		return -EINVAL;  in sprd_pctrl_group_pins()
238 	*pins = info->groups[selector].pins;  in sprd_pctrl_group_pins()
239 	*npins = info->groups[selector].npins;  in sprd_pctrl_group_pins()
259 	grp = sprd_pinctrl_find_group_by_name(pctl, np->name);  in sprd_dt_node_to_map()
261 		dev_err(pctl->dev, "unable to find group for node %s\n",  in sprd_dt_node_to_map()
263 		return -EINVAL;  in sprd_dt_node_to_map()
277 		if (ret != -EINVAL)  in sprd_dt_node_to_map()
278 			dev_err(pctl->dev,  in sprd_dt_node_to_map()
287 		dev_err(pctl->dev, "%s: could not parse node property\n",  in sprd_dt_node_to_map()
308 						grp->name, function);  in sprd_dt_node_to_map()
318 			pin_id = grp->pins[0];  in sprd_dt_node_to_map()
321 			group_or_pin = grp->name;  in sprd_dt_node_to_map()
338 	seq_printf(s, "%s", dev_name(pctldev->dev));  in sprd_pctrl_dbg_show()
378 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pmx_get_function_groups()
380 	*groups = info->grp_names;  in sprd_pmx_get_function_groups()
381 	*num_groups = info->ngroups;  in sprd_pmx_get_function_groups()
391 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pmx_set_mux()
392 	struct sprd_pin_group *grp = &info->groups[group_selector];  in sprd_pmx_set_mux()
393 	unsigned int i, grp_pins = grp->npins;  in sprd_pmx_set_mux()
395 	unsigned int val = 0;  in sprd_pmx_set_mux()  local
397 	if (group_selector >= info->ngroups)  in sprd_pmx_set_mux()
398 		return -EINVAL;  in sprd_pmx_set_mux()
402 		val &= PIN_FUNC_SEL_1;  in sprd_pmx_set_mux()
405 		val |= PIN_FUNC_SEL_2;  in sprd_pmx_set_mux()
408 		val |= PIN_FUNC_SEL_3;  in sprd_pmx_set_mux()
411 		val |= PIN_FUNC_SEL_4;  in sprd_pmx_set_mux()
418 		unsigned int pin_id = grp->pins[i];  in sprd_pmx_set_mux()
419 		struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);  in sprd_pmx_set_mux()  local
421 		if (!pin || pin->type != COMMON_PIN)  in sprd_pmx_set_mux()
424 		reg = readl((void __iomem *)pin->reg);  in sprd_pmx_set_mux()
426 		reg |= val;  in sprd_pmx_set_mux()
427 		writel(reg, (void __iomem *)pin->reg);  in sprd_pmx_set_mux()
444 	struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);  in sprd_pinconf_get()  local
448 	if (!pin)  in sprd_pinconf_get()
449 		return -EINVAL;  in sprd_pinconf_get()
451 	if (pin->type == GLOBAL_CTRL_PIN) {  in sprd_pinconf_get()
452 		reg = (readl((void __iomem *)pin->reg) >>  in sprd_pinconf_get()
453 			   pin->bit_offset) & PINCTRL_BIT_MASK(pin->bit_width);  in sprd_pinconf_get()
455 		reg = readl((void __iomem *)pin->reg);  in sprd_pinconf_get()
458 	if (pin->type == GLOBAL_CTRL_PIN &&  in sprd_pinconf_get()
461 	} else if (pin->type == COMMON_PIN || pin->type == MISC_PIN) {  in sprd_pinconf_get()
474 				return -EINVAL;  in sprd_pinconf_get()
500 				return -EINVAL;  in sprd_pinconf_get()
508 			return -ENOTSUPP;  in sprd_pinconf_get()
511 		return -ENOTSUPP;  in sprd_pinconf_get()
520 	unsigned int val = 0;  in sprd_pinconf_drive()  local
526 		val |= BIT(19);  in sprd_pinconf_drive()
529 		val |= BIT(20);  in sprd_pinconf_drive()
532 		val |= BIT(19) | BIT(20);  in sprd_pinconf_drive()
535 		val |= BIT(21);  in sprd_pinconf_drive()
538 		val |= BIT(21) | BIT(19);  in sprd_pinconf_drive()
541 		val |= BIT(21) | BIT(20);  in sprd_pinconf_drive()
544 		val |= BIT(19) | BIT(20) | BIT(21);  in sprd_pinconf_drive()
547 		val |= BIT(22);  in sprd_pinconf_drive()
550 		val |= BIT(22) | BIT(19);  in sprd_pinconf_drive()
553 		val |= BIT(22) | BIT(20);  in sprd_pinconf_drive()
556 		val |= BIT(22) | BIT(20) | BIT(19);  in sprd_pinconf_drive()
559 		val |= BIT(22) | BIT(21);  in sprd_pinconf_drive()
562 		val |= BIT(22) | BIT(21) | BIT(19);  in sprd_pinconf_drive()
565 		val |= BIT(22) | BIT(21) | BIT(20);  in sprd_pinconf_drive()
568 		val |= BIT(22) | BIT(21) | BIT(20) | BIT(19);  in sprd_pinconf_drive()
574 	return val;  in sprd_pinconf_drive()
596 	struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);  in sprd_pinconf_set()  local
601 	if (!pin)  in sprd_pinconf_set()
602 		return -EINVAL;  in sprd_pinconf_set()
607 		unsigned int param, arg, shift, mask, val;  in sprd_pinconf_set()  local
612 		val = 0;  in sprd_pinconf_set()
615 		if (pin->type == GLOBAL_CTRL_PIN &&  in sprd_pinconf_set()
617 			val = arg;  in sprd_pinconf_set()
618 		} else if (pin->type == COMMON_PIN || pin->type == MISC_PIN) {  in sprd_pinconf_set()
622 					val |= AP_SLEEP_MODE;  in sprd_pinconf_set()
624 					val |= PUBCP_SLEEP_MODE;  in sprd_pinconf_set()
626 					val |= TGLDSP_SLEEP_MODE;  in sprd_pinconf_set()
628 					val |= AGDSP_SLEEP_MODE;  in sprd_pinconf_set()
630 					val |= CM4_SLEEP_MODE;  in sprd_pinconf_set()
638 						val |= SLEEP_INPUT;  in sprd_pinconf_set()
640 						val &= ~SLEEP_INPUT;  in sprd_pinconf_set()
649 						val |= SLEEP_OUTPUT;  in sprd_pinconf_set()
651 						val &= ~SLEEP_OUTPUT;  in sprd_pinconf_set()
659 					val = shift = 0;  in sprd_pinconf_set()
665 					return -EINVAL;  in sprd_pinconf_set()
667 				val = sprd_pinconf_drive(arg);  in sprd_pinconf_set()
673 					val |= SLEEP_PULL_DOWN;  in sprd_pinconf_set()
677 					val |= PULL_DOWN;  in sprd_pinconf_set()
684 					val |= INPUT_SCHMITT;  in sprd_pinconf_set()
686 					val &= ~INPUT_SCHMITT;  in sprd_pinconf_set()
693 					val |= SLEEP_PULL_UP;  in sprd_pinconf_set()
698 						val |= PULL_UP_20K;  in sprd_pinconf_set()
700 						val |= PULL_UP_4_7K;  in sprd_pinconf_set()
708 					val = shift = 0;  in sprd_pinconf_set()
711 					val = shift = 0;  in sprd_pinconf_set()
719 				return -ENOTSUPP;  in sprd_pinconf_set()
722 			return -ENOTSUPP;  in sprd_pinconf_set()
725 		if (pin->type == GLOBAL_CTRL_PIN) {  in sprd_pinconf_set()
726 			reg = readl((void __iomem *)pin->reg);  in sprd_pinconf_set()
727 			reg &= ~(PINCTRL_BIT_MASK(pin->bit_width)  in sprd_pinconf_set()
728 				<< pin->bit_offset);  in sprd_pinconf_set()
729 			reg |= (val & PINCTRL_BIT_MASK(pin->bit_width))  in sprd_pinconf_set()
730 				<< pin->bit_offset;  in sprd_pinconf_set()
731 			writel(reg, (void __iomem *)pin->reg);  in sprd_pinconf_set()
733 			reg = readl((void __iomem *)pin->reg);  in sprd_pinconf_set()
735 			reg |= val;  in sprd_pinconf_set()
736 			writel(reg, (void __iomem *)pin->reg);  in sprd_pinconf_set()
747 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pinconf_group_get()
751 	if (selector >= info->ngroups)  in sprd_pinconf_group_get()
752 		return -EINVAL;  in sprd_pinconf_group_get()
754 	grp = &info->groups[selector];  in sprd_pinconf_group_get()
755 	pin_id = grp->pins[0];  in sprd_pinconf_group_get()
766 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pinconf_group_set()
770 	if (selector >= info->ngroups)  in sprd_pinconf_group_set()
771 		return -EINVAL;  in sprd_pinconf_group_set()
773 	grp = &info->groups[selector];  in sprd_pinconf_group_set()
775 	for (i = 0; i < grp->npins; i++) {  in sprd_pinconf_group_set()
776 		unsigned int pin_id = grp->pins[i];  in sprd_pinconf_group_set()
791 	struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);  in sprd_pinconf_get_config()  local
793 	if (!pin)  in sprd_pinconf_get_config()
794 		return -EINVAL;  in sprd_pinconf_get_config()
796 	if (pin->type == GLOBAL_CTRL_PIN) {  in sprd_pinconf_get_config()
797 		*config = (readl((void __iomem *)pin->reg) >>  in sprd_pinconf_get_config()
798 			   pin->bit_offset) & PINCTRL_BIT_MASK(pin->bit_width);  in sprd_pinconf_get_config()
800 		*config = readl((void __iomem *)pin->reg);  in sprd_pinconf_get_config()
824 	struct sprd_pinctrl_soc_info *info = pctl->info;  in sprd_pinconf_group_dbg_show()
830 	if (selector >= info->ngroups)  in sprd_pinconf_group_dbg_show()
833 	grp = &info->groups[selector];  in sprd_pinconf_group_dbg_show()
836 	for (i = 0; i < grp->npins; i++, config++) {  in sprd_pinconf_group_dbg_show()
837 		unsigned int pin_id = grp->pins[i];  in sprd_pinconf_group_dbg_show()
860 	{"sprd,sleep-mode", SPRD_PIN_CONFIG_SLEEP_MODE, 0},
894 	grp->name = np->name;  in sprd_pinctrl_parse_groups()
895 	grp->npins = ret;  in sprd_pinctrl_parse_groups()
896 	grp->pins = devm_kcalloc(sprd_pctl->dev,  in sprd_pinctrl_parse_groups()
897 				 grp->npins, sizeof(unsigned int),  in sprd_pinctrl_parse_groups()
899 	if (!grp->pins)  in sprd_pinctrl_parse_groups()
900 		return -ENOMEM;  in sprd_pinctrl_parse_groups()
905 			grp->pins[i++] = ret;  in sprd_pinctrl_parse_groups()
908 	for (i = 0; i < grp->npins; i++) {  in sprd_pinctrl_parse_groups()
909 		dev_dbg(sprd_pctl->dev,  in sprd_pinctrl_parse_groups()
911 			grp->name, grp->npins, grp->pins[i]);  in sprd_pinctrl_parse_groups()
935 	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;  in sprd_pinctrl_parse_dt()
936 	struct device_node *np = sprd_pctl->dev->of_node;  in sprd_pinctrl_parse_dt()
942 		return -ENODEV;  in sprd_pinctrl_parse_dt()
944 	info->ngroups = sprd_pinctrl_get_groups(np);  in sprd_pinctrl_parse_dt()
945 	if (!info->ngroups)  in sprd_pinctrl_parse_dt()
948 	info->groups = devm_kcalloc(sprd_pctl->dev,  in sprd_pinctrl_parse_dt()
949 				    info->ngroups,  in sprd_pinctrl_parse_dt()
952 	if (!info->groups)  in sprd_pinctrl_parse_dt()
953 		return -ENOMEM;  in sprd_pinctrl_parse_dt()
955 	info->grp_names = devm_kcalloc(sprd_pctl->dev,  in sprd_pinctrl_parse_dt()
956 				       info->ngroups, sizeof(char *),  in sprd_pinctrl_parse_dt()
958 	if (!info->grp_names)  in sprd_pinctrl_parse_dt()
959 		return -ENOMEM;  in sprd_pinctrl_parse_dt()
961 	temp = info->grp_names;  in sprd_pinctrl_parse_dt()
962 	grp = info->groups;  in sprd_pinctrl_parse_dt()
969 		*temp++ = grp->name;  in sprd_pinctrl_parse_dt()
979 				*temp++ = grp->name;  in sprd_pinctrl_parse_dt()
992 	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;  in sprd_pinctrl_add_pins()
994 	struct sprd_pin *pin;  in sprd_pinctrl_add_pins()  local
997 	info->npins = pins_cnt;  in sprd_pinctrl_add_pins()
998 	info->pins = devm_kcalloc(sprd_pctl->dev,  in sprd_pinctrl_add_pins()
999 				  info->npins, sizeof(struct sprd_pin),  in sprd_pinctrl_add_pins()
1001 	if (!info->pins)  in sprd_pinctrl_add_pins()
1002 		return -ENOMEM;  in sprd_pinctrl_add_pins()
1004 	for (i = 0, pin = info->pins; i < info->npins; i++, pin++) {  in sprd_pinctrl_add_pins()
1007 		pin->name = sprd_soc_pin_info[i].name;  in sprd_pinctrl_add_pins()
1008 		pin->type = sprd_soc_pin_info[i].type;  in sprd_pinctrl_add_pins()
1009 		pin->number = sprd_soc_pin_info[i].num;  in sprd_pinctrl_add_pins()
1011 		if (pin->type == GLOBAL_CTRL_PIN) {  in sprd_pinctrl_add_pins()
1012 			pin->reg = (unsigned long)sprd_pctl->base +  in sprd_pinctrl_add_pins()
1014 			pin->bit_offset = sprd_soc_pin_info[i].bit_offset;  in sprd_pinctrl_add_pins()
1015 			pin->bit_width = sprd_soc_pin_info[i].bit_width;  in sprd_pinctrl_add_pins()
1017 		} else if (pin->type == COMMON_PIN) {  in sprd_pinctrl_add_pins()
1018 			pin->reg = (unsigned long)sprd_pctl->base +  in sprd_pinctrl_add_pins()
1020 				(i - ctrl_pin);  in sprd_pinctrl_add_pins()
1022 		} else if (pin->type == MISC_PIN) {  in sprd_pinctrl_add_pins()
1023 			pin->reg = (unsigned long)sprd_pctl->base +  in sprd_pinctrl_add_pins()
1025 				(i - ctrl_pin - com_pin);  in sprd_pinctrl_add_pins()
1029 	for (i = 0, pin = info->pins; i < info->npins; pin++, i++) {  in sprd_pinctrl_add_pins()
1030 		dev_dbg(sprd_pctl->dev, "pin name[%s-%d], type = %d, "  in sprd_pinctrl_add_pins()
1032 			pin->name, pin->number, pin->type,  in sprd_pinctrl_add_pins()
1033 			pin->bit_offset, pin->bit_width, pin->reg);  in sprd_pinctrl_add_pins()
1048 	sprd_pctl = devm_kzalloc(&pdev->dev, sizeof(struct sprd_pinctrl),  in sprd_pinctrl_core_probe()
1051 		return -ENOMEM;  in sprd_pinctrl_core_probe()
1053 	sprd_pctl->base = devm_platform_ioremap_resource(pdev, 0);  in sprd_pinctrl_core_probe()
1054 	if (IS_ERR(sprd_pctl->base))  in sprd_pinctrl_core_probe()
1055 		return PTR_ERR(sprd_pctl->base);  in sprd_pinctrl_core_probe()
1057 	pinctrl_info = devm_kzalloc(&pdev->dev,  in sprd_pinctrl_core_probe()
1061 		return -ENOMEM;  in sprd_pinctrl_core_probe()
1063 	sprd_pctl->info = pinctrl_info;  in sprd_pinctrl_core_probe()
1064 	sprd_pctl->dev = &pdev->dev;  in sprd_pinctrl_core_probe()
1069 		dev_err(&pdev->dev, "fail to add pins information\n");  in sprd_pinctrl_core_probe()
1075 		dev_err(&pdev->dev, "fail to parse dt properties\n");  in sprd_pinctrl_core_probe()
1079 	pin_desc = devm_kcalloc(&pdev->dev,  in sprd_pinctrl_core_probe()
1080 				pinctrl_info->npins,  in sprd_pinctrl_core_probe()
1084 		return -ENOMEM;  in sprd_pinctrl_core_probe()
1086 	for (i = 0; i < pinctrl_info->npins; i++) {  in sprd_pinctrl_core_probe()
1087 		pin_desc[i].number = pinctrl_info->pins[i].number;  in sprd_pinctrl_core_probe()
1088 		pin_desc[i].name = pinctrl_info->pins[i].name;  in sprd_pinctrl_core_probe()
1093 	sprd_pinctrl_desc.name = dev_name(&pdev->dev);  in sprd_pinctrl_core_probe()
1094 	sprd_pinctrl_desc.npins = pinctrl_info->npins;  in sprd_pinctrl_core_probe()
1096 	sprd_pctl->pctl = pinctrl_register(&sprd_pinctrl_desc,  in sprd_pinctrl_core_probe()
1097 					   &pdev->dev, (void *)sprd_pctl);  in sprd_pinctrl_core_probe()
1098 	if (IS_ERR(sprd_pctl->pctl)) {  in sprd_pinctrl_core_probe()
1099 		dev_err(&pdev->dev, "could not register pinctrl driver\n");  in sprd_pinctrl_core_probe()
1100 		return PTR_ERR(sprd_pctl->pctl);  in sprd_pinctrl_core_probe()
1111 	pinctrl_unregister(sprd_pctl->pctl);  in sprd_pinctrl_remove()
1120 	pinctl = devm_pinctrl_get(&pdev->dev);  in sprd_pinctrl_shutdown()
1130 MODULE_DESCRIPTION("SPREADTRUM Pin Controller Driver");