1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
11 // Samsung - GPIOlib support
31 #include "regs-gpio.h"
32 #include "gpio-samsung.h"
35 #include "gpio-core.h"
36 #include "gpio-cfg.h"
37 #include "gpio-cfg-helpers.h"
40 static int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip,  in samsung_gpio_setpull_updown()  argument
41 				unsigned int off, samsung_gpio_pull_t pull)  in samsung_gpio_setpull_updown()  argument
43 	void __iomem *reg = chip->base + 0x08;  in samsung_gpio_setpull_updown()
44 	int shift = off * 2;  in samsung_gpio_setpull_updown()
55 static samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip,  in samsung_gpio_getpull_updown()  argument
56 						unsigned int off)  in samsung_gpio_getpull_updown()  argument
58 	void __iomem *reg = chip->base + 0x08;  in samsung_gpio_getpull_updown()
59 	int shift = off * 2;  in samsung_gpio_getpull_updown()
68 static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip *chip,  in samsung_gpio_setcfg_2bit()  argument
69 				    unsigned int off, unsigned int cfg)  in samsung_gpio_setcfg_2bit()  argument
71 	void __iomem *reg = chip->base;  in samsung_gpio_setcfg_2bit()
72 	unsigned int shift = off * 2;  in samsung_gpio_setcfg_2bit()
78 			return -EINVAL;  in samsung_gpio_setcfg_2bit()
92  * samsung_gpio_getcfg_2bit - Samsung 2bit style GPIO configuration read.
93  * @chip: The gpio chip that is being configured.
94  * @off: The offset for the GPIO being configured.
101 static unsigned int samsung_gpio_getcfg_2bit(struct samsung_gpio_chip *chip,  in samsung_gpio_getcfg_2bit()  argument
102 					     unsigned int off)  in samsung_gpio_getcfg_2bit()  argument
106 	con = __raw_readl(chip->base);  in samsung_gpio_getcfg_2bit()
107 	con >>= off * 2;  in samsung_gpio_getcfg_2bit()
115  * samsung_gpio_setcfg_4bit - Samsung 4bit single register GPIO config.
116  * @chip: The gpio chip that is being configured.
117  * @off: The offset for the GPIO being configured.
131 static int samsung_gpio_setcfg_4bit(struct samsung_gpio_chip *chip,  in samsung_gpio_setcfg_4bit()  argument
132 				    unsigned int off, unsigned int cfg)  in samsung_gpio_setcfg_4bit()  argument
134 	void __iomem *reg = chip->base;  in samsung_gpio_setcfg_4bit()
135 	unsigned int shift = (off & 7) * 4;  in samsung_gpio_setcfg_4bit()
138 	if (off < 8 && chip->chip.ngpio > 8)  in samsung_gpio_setcfg_4bit()
139 		reg -= 4;  in samsung_gpio_setcfg_4bit()
155  * samsung_gpio_getcfg_4bit - Samsung 4bit single register GPIO config read.
156  * @chip: The gpio chip that is being configured.
157  * @off: The offset for the GPIO being configured.
166 static unsigned samsung_gpio_getcfg_4bit(struct samsung_gpio_chip *chip,  in samsung_gpio_getcfg_4bit()  argument
167 					 unsigned int off)  in samsung_gpio_getcfg_4bit()  argument
169 	void __iomem *reg = chip->base;  in samsung_gpio_getcfg_4bit()
170 	unsigned int shift = (off & 7) * 4;  in samsung_gpio_getcfg_4bit()
173 	if (off < 8 && chip->chip.ngpio > 8)  in samsung_gpio_getcfg_4bit()
174 		reg -= 4;  in samsung_gpio_getcfg_4bit()
187 	for (; nr_chips > 0; nr_chips--, chipcfg++) {  in samsung_gpiolib_set_cfg()
188 		if (!chipcfg->set_config)  in samsung_gpiolib_set_cfg()
189 			chipcfg->set_config = samsung_gpio_setcfg_4bit;  in samsung_gpiolib_set_cfg()
190 		if (!chipcfg->get_config)  in samsung_gpiolib_set_cfg()
191 			chipcfg->get_config = samsung_gpio_getcfg_4bit;  in samsung_gpiolib_set_cfg()
192 		if (!chipcfg->set_pull)  in samsung_gpiolib_set_cfg()
193 			chipcfg->set_pull = samsung_gpio_setpull_updown;  in samsung_gpiolib_set_cfg()
194 		if (!chipcfg->get_pull)  in samsung_gpiolib_set_cfg()
195 			chipcfg->get_pull = samsung_gpio_getpull_updown;  in samsung_gpiolib_set_cfg()
236  * chip is as following:
240  *		00 = input, 01 = output, others mean special-function
245 static int samsung_gpiolib_2bit_input(struct gpio_chip *chip, unsigned offset)  in samsung_gpiolib_2bit_input()  argument
247 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_2bit_input()
248 	void __iomem *base = ourchip->base;  in samsung_gpiolib_2bit_input()
263 static int samsung_gpiolib_2bit_output(struct gpio_chip *chip,  in samsung_gpiolib_2bit_output()  argument
266 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_2bit_output()
267 	void __iomem *base = ourchip->base;  in samsung_gpiolib_2bit_output()
298  *		0000 = input, 0001 = output, others mean special-function
307 static int samsung_gpiolib_4bit_input(struct gpio_chip *chip,  in samsung_gpiolib_4bit_input()  argument
310 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_4bit_input()
311 	void __iomem *base = ourchip->base;  in samsung_gpiolib_4bit_input()
315 	if (ourchip->bitmap_gpio_int & BIT(offset))  in samsung_gpiolib_4bit_input()
326 static int samsung_gpiolib_4bit_output(struct gpio_chip *chip,  in samsung_gpiolib_4bit_output()  argument
329 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_4bit_output()
330 	void __iomem *base = ourchip->base;  in samsung_gpiolib_4bit_output()
364  *		0000 = input, 0001 = output, others mean special-function
367  *		0000 = input, 0001 = output, others mean special-function
373  * the data register at ourchip->base + 0x04.
376 static int samsung_gpiolib_4bit2_input(struct gpio_chip *chip,  in samsung_gpiolib_4bit2_input()  argument
379 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_4bit2_input()
380 	void __iomem *base = ourchip->base;  in samsung_gpiolib_4bit2_input()
385 		offset -= 8;  in samsung_gpiolib_4bit2_input()
387 		regcon -= 4;  in samsung_gpiolib_4bit2_input()
398 static int samsung_gpiolib_4bit2_output(struct gpio_chip *chip,  in samsung_gpiolib_4bit2_output()  argument
401 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_4bit2_output()
402 	void __iomem *base = ourchip->base;  in samsung_gpiolib_4bit2_output()
409 		con_offset -= 8;  in samsung_gpiolib_4bit2_output()
411 		regcon -= 4;  in samsung_gpiolib_4bit2_output()
433 static void samsung_gpiolib_set(struct gpio_chip *chip,  in samsung_gpiolib_set()  argument
436 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_set()
437 	void __iomem *base = ourchip->base;  in samsung_gpiolib_set()
452 static int samsung_gpiolib_get(struct gpio_chip *chip, unsigned offset)  in samsung_gpiolib_get()  argument
454 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);  in samsung_gpiolib_get()
457 	val = __raw_readl(ourchip->base + 0x04);  in samsung_gpiolib_get()
479 static __init void s3c_gpiolib_track(struct samsung_gpio_chip *chip)  in s3c_gpiolib_track()  argument
484 	gpn = chip->chip.base;  in s3c_gpiolib_track()
485 	for (i = 0; i < chip->chip.ngpio; i++, gpn++) {  in s3c_gpiolib_track()
487 		s3c_gpios[gpn] = chip;  in s3c_gpiolib_track()
493  * samsung_gpiolib_add() - add the Samsung gpio_chip.
494  * @chip: The chip to register
496  * This is a wrapper to gpiochip_add() that takes our specific gpio chip
502 static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip)  in samsung_gpiolib_add()  argument
504 	struct gpio_chip *gc = &chip->chip;  in samsung_gpiolib_add()
507 	BUG_ON(!chip->base);  in samsung_gpiolib_add()
508 	BUG_ON(!gc->label);  in samsung_gpiolib_add()
509 	BUG_ON(!gc->ngpio);  in samsung_gpiolib_add()
511 	spin_lock_init(&chip->lock);  in samsung_gpiolib_add()
513 	if (!gc->direction_input)  in samsung_gpiolib_add()
514 		gc->direction_input = samsung_gpiolib_2bit_input;  in samsung_gpiolib_add()
515 	if (!gc->direction_output)  in samsung_gpiolib_add()
516 		gc->direction_output = samsung_gpiolib_2bit_output;  in samsung_gpiolib_add()
517 	if (!gc->set)  in samsung_gpiolib_add()
518 		gc->set = samsung_gpiolib_set;  in samsung_gpiolib_add()
519 	if (!gc->get)  in samsung_gpiolib_add()
520 		gc->get = samsung_gpiolib_get;  in samsung_gpiolib_add()
523 	if (chip->pm != NULL) {  in samsung_gpiolib_add()
524 		if (!chip->pm->save || !chip->pm->resume)  in samsung_gpiolib_add()
526 			       gc->label);  in samsung_gpiolib_add()
528 		pr_err("gpio: %s has no PM function\n", gc->label);  in samsung_gpiolib_add()
532 	ret = gpiochip_add_data(gc, chip);  in samsung_gpiolib_add()
534 		s3c_gpiolib_track(chip);  in samsung_gpiolib_add()
537 static void __init samsung_gpiolib_add_2bit_chips(struct samsung_gpio_chip *chip,  in samsung_gpiolib_add_2bit_chips()  argument
543 	for (i = 0 ; i < nr_chips; i++, chip++) {  in samsung_gpiolib_add_2bit_chips()
544 		chip->chip.direction_input = samsung_gpiolib_2bit_input;  in samsung_gpiolib_add_2bit_chips()
545 		chip->chip.direction_output = samsung_gpiolib_2bit_output;  in samsung_gpiolib_add_2bit_chips()
547 		if (!chip->config)  in samsung_gpiolib_add_2bit_chips()
548 			chip->config = &samsung_gpio_cfgs[7];  in samsung_gpiolib_add_2bit_chips()
549 		if (!chip->pm)  in samsung_gpiolib_add_2bit_chips()
550 			chip->pm = __gpio_pm(&samsung_gpio_pm_2bit);  in samsung_gpiolib_add_2bit_chips()
551 		if ((base != NULL) && (chip->base == NULL))  in samsung_gpiolib_add_2bit_chips()
552 			chip->base = base + ((i) * offset);  in samsung_gpiolib_add_2bit_chips()
554 		samsung_gpiolib_add(chip);  in samsung_gpiolib_add_2bit_chips()
559  * samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config.
560  * @chip: The gpio chip that is being configured.
574 static void __init samsung_gpiolib_add_4bit_chips(struct samsung_gpio_chip *chip,  in samsung_gpiolib_add_4bit_chips()  argument
579 	for (i = 0 ; i < nr_chips; i++, chip++) {  in samsung_gpiolib_add_4bit_chips()
580 		chip->chip.direction_input = samsung_gpiolib_4bit_input;  in samsung_gpiolib_add_4bit_chips()
581 		chip->chip.direction_output = samsung_gpiolib_4bit_output;  in samsung_gpiolib_add_4bit_chips()
583 		if (!chip->config)  in samsung_gpiolib_add_4bit_chips()
584 			chip->config = &samsung_gpio_cfgs[2];  in samsung_gpiolib_add_4bit_chips()
585 		if (!chip->pm)  in samsung_gpiolib_add_4bit_chips()
586 			chip->pm = __gpio_pm(&samsung_gpio_pm_4bit);  in samsung_gpiolib_add_4bit_chips()
587 		if ((base != NULL) && (chip->base == NULL))  in samsung_gpiolib_add_4bit_chips()
588 			chip->base = base + ((i) * 0x20);  in samsung_gpiolib_add_4bit_chips()
590 		chip->bitmap_gpio_int = 0;  in samsung_gpiolib_add_4bit_chips()
592 		samsung_gpiolib_add(chip);  in samsung_gpiolib_add_4bit_chips()
596 static void __init samsung_gpiolib_add_4bit2_chips(struct samsung_gpio_chip *chip,  in samsung_gpiolib_add_4bit2_chips()  argument
599 	for (; nr_chips > 0; nr_chips--, chip++) {  in samsung_gpiolib_add_4bit2_chips()
600 		chip->chip.direction_input = samsung_gpiolib_4bit2_input;  in samsung_gpiolib_add_4bit2_chips()
601 		chip->chip.direction_output = samsung_gpiolib_4bit2_output;  in samsung_gpiolib_add_4bit2_chips()
603 		if (!chip->config)  in samsung_gpiolib_add_4bit2_chips()
604 			chip->config = &samsung_gpio_cfgs[2];  in samsung_gpiolib_add_4bit2_chips()
605 		if (!chip->pm)  in samsung_gpiolib_add_4bit2_chips()
606 			chip->pm = __gpio_pm(&samsung_gpio_pm_4bit);  in samsung_gpiolib_add_4bit2_chips()
608 		samsung_gpiolib_add(chip);  in samsung_gpiolib_add_4bit2_chips()
612 int samsung_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset)  in samsung_gpiolib_to_irq()  argument
614 	struct samsung_gpio_chip *samsung_chip = gpiochip_get_data(chip);  in samsung_gpiolib_to_irq()
616 	return samsung_chip->irq_base + offset;  in samsung_gpiolib_to_irq()
619 static int s3c64xx_gpiolib_mbank_to_irq(struct gpio_chip *chip, unsigned pin)  in s3c64xx_gpiolib_mbank_to_irq()  argument
621 	return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO;  in s3c64xx_gpiolib_mbank_to_irq()
624 static int s3c64xx_gpiolib_lbank_to_irq(struct gpio_chip *chip, unsigned pin)  in s3c64xx_gpiolib_lbank_to_irq()  argument
626 	return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO;  in s3c64xx_gpiolib_lbank_to_irq()
657 		.chip	= {
663 		.chip	= {
669 		.chip	= {
675 		.chip	= {
682 		.chip	= {
689 		.chip	= {
697 		.chip	= {
709 		.chip	= {
717 		.chip	= {
725 		.chip	= {
738 		.chip	= {
745 		.chip	= {
752 		.chip	= {
759 		.chip	= {
766 		.chip	= {
773 		.chip	= {
782 		.chip	= {
797 	 * pinctrl-samsung driver is used, providing both GPIO and pin control  in samsung_gpiolib_init()
798 	 * interfaces. For legacy (non-DT) platforms this driver is used.  in samsung_gpiolib_init()
822 	struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);  in s3c_gpio_cfgpin()  local
827 	if (!chip)  in s3c_gpio_cfgpin()
828 		return -EINVAL;  in s3c_gpio_cfgpin()
830 	offset = pin - chip->chip.base;  in s3c_gpio_cfgpin()
832 	samsung_gpio_lock(chip, flags);  in s3c_gpio_cfgpin()
833 	ret = samsung_gpio_do_setcfg(chip, offset, config);  in s3c_gpio_cfgpin()
834 	samsung_gpio_unlock(chip, flags);  in s3c_gpio_cfgpin()
845 	for (; nr > 0; nr--, start++) {  in s3c_gpio_cfgpin_range()
860 	for (; nr > 0; nr--, start++) {  in s3c_gpio_cfgall_range()
873 	struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);  in s3c_gpio_setpull()  local
877 	if (!chip)  in s3c_gpio_setpull()
878 		return -EINVAL;  in s3c_gpio_setpull()
880 	offset = pin - chip->chip.base;  in s3c_gpio_setpull()
882 	samsung_gpio_lock(chip, flags);  in s3c_gpio_setpull()
883 	ret = samsung_gpio_do_setpull(chip, offset, pull);  in s3c_gpio_setpull()
884 	samsung_gpio_unlock(chip, flags);  in s3c_gpio_setpull()