2 * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com/
5 * Copyright 2008 Openmoko, Inc.
6 * Copyright 2008 Simtec Electronics
8 * http://armlinux.simtec.co.uk/
10 * SAMSUNG - GPIOlib support
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
17 #include <linux/kernel.h>
18 #include <linux/irq.h>
20 #include <linux/gpio.h>
21 #include <linux/init.h>
22 #include <linux/spinlock.h>
23 #include <linux/module.h>
24 #include <linux/interrupt.h>
25 #include <linux/device.h>
26 #include <linux/ioport.h>
28 #include <linux/slab.h>
29 #include <linux/of_address.h>
34 #include <mach/regs-gpio.h>
35 #include <mach/gpio-samsung.h>
38 #include <plat/gpio-core.h>
39 #include <plat/gpio-cfg.h>
40 #include <plat/gpio-cfg-helpers.h>
43 int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip,
44 unsigned int off, samsung_gpio_pull_t pull)
46 void __iomem *reg = chip->base + 0x08;
50 pup = __raw_readl(reg);
53 __raw_writel(pup, reg);
58 samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip,
61 void __iomem *reg = chip->base + 0x08;
63 u32 pup = __raw_readl(reg);
68 return (__force samsung_gpio_pull_t)pup;
71 int s3c2443_gpio_setpull(struct samsung_gpio_chip *chip,
72 unsigned int off, samsung_gpio_pull_t pull)
75 case S3C_GPIO_PULL_NONE:
78 case S3C_GPIO_PULL_UP:
81 case S3C_GPIO_PULL_DOWN:
85 return samsung_gpio_setpull_updown(chip, off, pull);
88 samsung_gpio_pull_t s3c2443_gpio_getpull(struct samsung_gpio_chip *chip,
91 samsung_gpio_pull_t pull;
93 pull = samsung_gpio_getpull_updown(chip, off);
97 pull = S3C_GPIO_PULL_UP;
101 pull = S3C_GPIO_PULL_NONE;
104 pull = S3C_GPIO_PULL_DOWN;
111 static int s3c24xx_gpio_setpull_1(struct samsung_gpio_chip *chip,
112 unsigned int off, samsung_gpio_pull_t pull,
113 samsung_gpio_pull_t updown)
115 void __iomem *reg = chip->base + 0x08;
116 u32 pup = __raw_readl(reg);
120 else if (pull == S3C_GPIO_PULL_NONE)
125 __raw_writel(pup, reg);
129 static samsung_gpio_pull_t s3c24xx_gpio_getpull_1(struct samsung_gpio_chip *chip,
131 samsung_gpio_pull_t updown)
133 void __iomem *reg = chip->base + 0x08;
134 u32 pup = __raw_readl(reg);
137 return pup ? S3C_GPIO_PULL_NONE : updown;
140 samsung_gpio_pull_t s3c24xx_gpio_getpull_1up(struct samsung_gpio_chip *chip,
143 return s3c24xx_gpio_getpull_1(chip, off, S3C_GPIO_PULL_UP);
146 int s3c24xx_gpio_setpull_1up(struct samsung_gpio_chip *chip,
147 unsigned int off, samsung_gpio_pull_t pull)
149 return s3c24xx_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_UP);
152 samsung_gpio_pull_t s3c24xx_gpio_getpull_1down(struct samsung_gpio_chip *chip,
155 return s3c24xx_gpio_getpull_1(chip, off, S3C_GPIO_PULL_DOWN);
158 int s3c24xx_gpio_setpull_1down(struct samsung_gpio_chip *chip,
159 unsigned int off, samsung_gpio_pull_t pull)
161 return s3c24xx_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_DOWN);
165 * samsung_gpio_setcfg_2bit - Samsung 2bit style GPIO configuration.
166 * @chip: The gpio chip that is being configured.
167 * @off: The offset for the GPIO being configured.
168 * @cfg: The configuration value to set.
170 * This helper deal with the GPIO cases where the control register
171 * has two bits of configuration per gpio, which have the following
175 * 1x = special function
178 static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip *chip,
179 unsigned int off, unsigned int cfg)
181 void __iomem *reg = chip->base;
182 unsigned int shift = off * 2;
185 if (samsung_gpio_is_cfg_special(cfg)) {
193 con = __raw_readl(reg);
194 con &= ~(0x3 << shift);
196 __raw_writel(con, reg);
202 * samsung_gpio_getcfg_2bit - Samsung 2bit style GPIO configuration read.
203 * @chip: The gpio chip that is being configured.
204 * @off: The offset for the GPIO being configured.
206 * The reverse of samsung_gpio_setcfg_2bit(). Will return a value which
207 * could be directly passed back to samsung_gpio_setcfg_2bit(), from the
208 * S3C_GPIO_SPECIAL() macro.
211 static unsigned int samsung_gpio_getcfg_2bit(struct samsung_gpio_chip *chip,
216 con = __raw_readl(chip->base);
220 /* this conversion works for IN and OUT as well as special mode */
221 return S3C_GPIO_SPECIAL(con);
225 * samsung_gpio_setcfg_4bit - Samsung 4bit single register GPIO config.
226 * @chip: The gpio chip that is being configured.
227 * @off: The offset for the GPIO being configured.
228 * @cfg: The configuration value to set.
230 * This helper deal with the GPIO cases where the control register has 4 bits
231 * of control per GPIO, generally in the form of:
234 * others = Special functions (dependent on bank)
236 * Note, since the code to deal with the case where there are two control
237 * registers instead of one, we do not have a separate set of functions for
241 static int samsung_gpio_setcfg_4bit(struct samsung_gpio_chip *chip,
242 unsigned int off, unsigned int cfg)
244 void __iomem *reg = chip->base;
245 unsigned int shift = (off & 7) * 4;
248 if (off < 8 && chip->chip.ngpio > 8)
251 if (samsung_gpio_is_cfg_special(cfg)) {
256 con = __raw_readl(reg);
257 con &= ~(0xf << shift);
259 __raw_writel(con, reg);
265 * samsung_gpio_getcfg_4bit - Samsung 4bit single register GPIO config read.
266 * @chip: The gpio chip that is being configured.
267 * @off: The offset for the GPIO being configured.
269 * The reverse of samsung_gpio_setcfg_4bit(), turning a gpio configuration
270 * register setting into a value the software can use, such as could be passed
271 * to samsung_gpio_setcfg_4bit().
273 * @sa samsung_gpio_getcfg_2bit
276 static unsigned samsung_gpio_getcfg_4bit(struct samsung_gpio_chip *chip,
279 void __iomem *reg = chip->base;
280 unsigned int shift = (off & 7) * 4;
283 if (off < 8 && chip->chip.ngpio > 8)
286 con = __raw_readl(reg);
290 /* this conversion works for IN and OUT as well as special mode */
291 return S3C_GPIO_SPECIAL(con);
294 #ifdef CONFIG_PLAT_S3C24XX
296 * s3c24xx_gpio_setcfg_abank - S3C24XX style GPIO configuration (Bank A)
297 * @chip: The gpio chip that is being configured.
298 * @off: The offset for the GPIO being configured.
299 * @cfg: The configuration value to set.
301 * This helper deal with the GPIO cases where the control register
302 * has one bit of configuration for the gpio, where setting the bit
303 * means the pin is in special function mode and unset means output.
306 static int s3c24xx_gpio_setcfg_abank(struct samsung_gpio_chip *chip,
307 unsigned int off, unsigned int cfg)
309 void __iomem *reg = chip->base;
310 unsigned int shift = off;
313 if (samsung_gpio_is_cfg_special(cfg)) {
316 /* Map output to 0, and SFN2 to 1 */
324 con = __raw_readl(reg);
325 con &= ~(0x1 << shift);
327 __raw_writel(con, reg);
333 * s3c24xx_gpio_getcfg_abank - S3C24XX style GPIO configuration read (Bank A)
334 * @chip: The gpio chip that is being configured.
335 * @off: The offset for the GPIO being configured.
337 * The reverse of s3c24xx_gpio_setcfg_abank() turning an GPIO into a usable
338 * GPIO configuration value.
340 * @sa samsung_gpio_getcfg_2bit
341 * @sa samsung_gpio_getcfg_4bit
344 static unsigned s3c24xx_gpio_getcfg_abank(struct samsung_gpio_chip *chip,
349 con = __raw_readl(chip->base);
354 return S3C_GPIO_SFN(con);
358 static void __init samsung_gpiolib_set_cfg(struct samsung_gpio_cfg *chipcfg,
361 for (; nr_chips > 0; nr_chips--, chipcfg++) {
362 if (!chipcfg->set_config)
363 chipcfg->set_config = samsung_gpio_setcfg_4bit;
364 if (!chipcfg->get_config)
365 chipcfg->get_config = samsung_gpio_getcfg_4bit;
366 if (!chipcfg->set_pull)
367 chipcfg->set_pull = samsung_gpio_setpull_updown;
368 if (!chipcfg->get_pull)
369 chipcfg->get_pull = samsung_gpio_getpull_updown;
373 struct samsung_gpio_cfg s3c24xx_gpiocfg_default = {
374 .set_config = samsung_gpio_setcfg_2bit,
375 .get_config = samsung_gpio_getcfg_2bit,
378 #ifdef CONFIG_PLAT_S3C24XX
379 static struct samsung_gpio_cfg s3c24xx_gpiocfg_banka = {
380 .set_config = s3c24xx_gpio_setcfg_abank,
381 .get_config = s3c24xx_gpio_getcfg_abank,
385 static struct samsung_gpio_cfg samsung_gpio_cfgs[] = {
400 .set_config = samsung_gpio_setcfg_2bit,
401 .get_config = samsung_gpio_getcfg_2bit,
405 .set_config = samsung_gpio_setcfg_2bit,
406 .get_config = samsung_gpio_getcfg_2bit,
410 .set_config = samsung_gpio_setcfg_2bit,
411 .get_config = samsung_gpio_getcfg_2bit,
414 .set_config = samsung_gpio_setcfg_2bit,
415 .get_config = samsung_gpio_getcfg_2bit,
420 * Default routines for controlling GPIO, based on the original S3C24XX
421 * GPIO functions which deal with the case where each gpio bank of the
422 * chip is as following:
424 * base + 0x00: Control register, 2 bits per gpio
425 * gpio n: 2 bits starting at (2*n)
426 * 00 = input, 01 = output, others mean special-function
427 * base + 0x04: Data register, 1 bit per gpio
431 static int samsung_gpiolib_2bit_input(struct gpio_chip *chip, unsigned offset)
433 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
434 void __iomem *base = ourchip->base;
438 samsung_gpio_lock(ourchip, flags);
440 con = __raw_readl(base + 0x00);
441 con &= ~(3 << (offset * 2));
443 __raw_writel(con, base + 0x00);
445 samsung_gpio_unlock(ourchip, flags);
449 static int samsung_gpiolib_2bit_output(struct gpio_chip *chip,
450 unsigned offset, int value)
452 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
453 void __iomem *base = ourchip->base;
458 samsung_gpio_lock(ourchip, flags);
460 dat = __raw_readl(base + 0x04);
461 dat &= ~(1 << offset);
464 __raw_writel(dat, base + 0x04);
466 con = __raw_readl(base + 0x00);
467 con &= ~(3 << (offset * 2));
468 con |= 1 << (offset * 2);
470 __raw_writel(con, base + 0x00);
471 __raw_writel(dat, base + 0x04);
473 samsung_gpio_unlock(ourchip, flags);
478 * The samsung_gpiolib_4bit routines are to control the gpio banks where
479 * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the
482 * base + 0x00: Control register, 4 bits per gpio
483 * gpio n: 4 bits starting at (4*n)
484 * 0000 = input, 0001 = output, others mean special-function
485 * base + 0x04: Data register, 1 bit per gpio
488 * Note, since the data register is one bit per gpio and is at base + 0x4
489 * we can use samsung_gpiolib_get and samsung_gpiolib_set to change the
490 * state of the output.
493 static int samsung_gpiolib_4bit_input(struct gpio_chip *chip,
496 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
497 void __iomem *base = ourchip->base;
500 con = __raw_readl(base + GPIOCON_OFF);
501 if (ourchip->bitmap_gpio_int & BIT(offset))
502 con |= 0xf << con_4bit_shift(offset);
504 con &= ~(0xf << con_4bit_shift(offset));
505 __raw_writel(con, base + GPIOCON_OFF);
507 pr_debug("%s: %p: CON now %08lx\n", __func__, base, con);
512 static int samsung_gpiolib_4bit_output(struct gpio_chip *chip,
513 unsigned int offset, int value)
515 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
516 void __iomem *base = ourchip->base;
520 con = __raw_readl(base + GPIOCON_OFF);
521 con &= ~(0xf << con_4bit_shift(offset));
522 con |= 0x1 << con_4bit_shift(offset);
524 dat = __raw_readl(base + GPIODAT_OFF);
529 dat &= ~(1 << offset);
531 __raw_writel(dat, base + GPIODAT_OFF);
532 __raw_writel(con, base + GPIOCON_OFF);
533 __raw_writel(dat, base + GPIODAT_OFF);
535 pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
541 * The next set of routines are for the case where the GPIO configuration
542 * registers are 4 bits per GPIO but there is more than one register (the
543 * bank has more than 8 GPIOs.
545 * This case is the similar to the 4 bit case, but the registers are as
548 * base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs)
549 * gpio n: 4 bits starting at (4*n)
550 * 0000 = input, 0001 = output, others mean special-function
551 * base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs)
552 * gpio n: 4 bits starting at (4*n)
553 * 0000 = input, 0001 = output, others mean special-function
554 * base + 0x08: Data register, 1 bit per gpio
557 * To allow us to use the samsung_gpiolib_get and samsung_gpiolib_set
558 * routines we store the 'base + 0x4' address so that these routines see
559 * the data register at ourchip->base + 0x04.
562 static int samsung_gpiolib_4bit2_input(struct gpio_chip *chip,
565 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
566 void __iomem *base = ourchip->base;
567 void __iomem *regcon = base;
575 con = __raw_readl(regcon);
576 con &= ~(0xf << con_4bit_shift(offset));
577 __raw_writel(con, regcon);
579 pr_debug("%s: %p: CON %08lx\n", __func__, base, con);
584 static int samsung_gpiolib_4bit2_output(struct gpio_chip *chip,
585 unsigned int offset, int value)
587 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
588 void __iomem *base = ourchip->base;
589 void __iomem *regcon = base;
592 unsigned con_offset = offset;
599 con = __raw_readl(regcon);
600 con &= ~(0xf << con_4bit_shift(con_offset));
601 con |= 0x1 << con_4bit_shift(con_offset);
603 dat = __raw_readl(base + GPIODAT_OFF);
608 dat &= ~(1 << offset);
610 __raw_writel(dat, base + GPIODAT_OFF);
611 __raw_writel(con, regcon);
612 __raw_writel(dat, base + GPIODAT_OFF);
614 pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
619 #ifdef CONFIG_PLAT_S3C24XX
620 /* The next set of routines are for the case of s3c24xx bank a */
622 static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
627 static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
628 unsigned offset, int value)
630 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
631 void __iomem *base = ourchip->base;
636 local_irq_save(flags);
638 con = __raw_readl(base + 0x00);
639 dat = __raw_readl(base + 0x04);
641 dat &= ~(1 << offset);
645 __raw_writel(dat, base + 0x04);
647 con &= ~(1 << offset);
649 __raw_writel(con, base + 0x00);
650 __raw_writel(dat, base + 0x04);
652 local_irq_restore(flags);
657 static void samsung_gpiolib_set(struct gpio_chip *chip,
658 unsigned offset, int value)
660 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
661 void __iomem *base = ourchip->base;
665 samsung_gpio_lock(ourchip, flags);
667 dat = __raw_readl(base + 0x04);
668 dat &= ~(1 << offset);
671 __raw_writel(dat, base + 0x04);
673 samsung_gpio_unlock(ourchip, flags);
676 static int samsung_gpiolib_get(struct gpio_chip *chip, unsigned offset)
678 struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
681 val = __raw_readl(ourchip->base + 0x04);
689 * CONFIG_S3C_GPIO_TRACK enables the tracking of the s3c specific gpios
690 * for use with the configuration calls, and other parts of the s3c gpiolib
693 * Not all s3c support code will need this, as some configurations of cpu
694 * may only support one or two different configuration options and have an
695 * easy gpio to samsung_gpio_chip mapping function. If this is the case, then
696 * the machine support file should provide its own samsung_gpiolib_getchip()
697 * and any other necessary functions.
700 #ifdef CONFIG_S3C_GPIO_TRACK
701 struct samsung_gpio_chip *s3c_gpios[S3C_GPIO_END];
703 static __init void s3c_gpiolib_track(struct samsung_gpio_chip *chip)
708 gpn = chip->chip.base;
709 for (i = 0; i < chip->chip.ngpio; i++, gpn++) {
710 BUG_ON(gpn >= ARRAY_SIZE(s3c_gpios));
711 s3c_gpios[gpn] = chip;
714 #endif /* CONFIG_S3C_GPIO_TRACK */
717 * samsung_gpiolib_add() - add the Samsung gpio_chip.
718 * @chip: The chip to register
720 * This is a wrapper to gpiochip_add() that takes our specific gpio chip
721 * information and makes the necessary alterations for the platform and
722 * notes the information for use with the configuration systems and any
723 * other parts of the system.
726 static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip)
728 struct gpio_chip *gc = &chip->chip;
735 spin_lock_init(&chip->lock);
737 if (!gc->direction_input)
738 gc->direction_input = samsung_gpiolib_2bit_input;
739 if (!gc->direction_output)
740 gc->direction_output = samsung_gpiolib_2bit_output;
742 gc->set = samsung_gpiolib_set;
744 gc->get = samsung_gpiolib_get;
747 if (chip->pm != NULL) {
748 if (!chip->pm->save || !chip->pm->resume)
749 pr_err("gpio: %s has missing PM functions\n",
752 pr_err("gpio: %s has no PM function\n", gc->label);
755 /* gpiochip_add() prints own failure message on error. */
756 ret = gpiochip_add(gc);
758 s3c_gpiolib_track(chip);
761 static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip *chip,
762 int nr_chips, void __iomem *base)
765 struct gpio_chip *gc = &chip->chip;
767 for (i = 0 ; i < nr_chips; i++, chip++) {
768 /* skip banks not present on SoC */
769 if (chip->chip.base >= S3C_GPIO_END)
773 chip->config = &s3c24xx_gpiocfg_default;
775 chip->pm = __gpio_pm(&samsung_gpio_pm_2bit);
776 if ((base != NULL) && (chip->base == NULL))
777 chip->base = base + ((i) * 0x10);
779 if (!gc->direction_input)
780 gc->direction_input = samsung_gpiolib_2bit_input;
781 if (!gc->direction_output)
782 gc->direction_output = samsung_gpiolib_2bit_output;
784 samsung_gpiolib_add(chip);
788 static void __init samsung_gpiolib_add_2bit_chips(struct samsung_gpio_chip *chip,
789 int nr_chips, void __iomem *base,
794 for (i = 0 ; i < nr_chips; i++, chip++) {
795 chip->chip.direction_input = samsung_gpiolib_2bit_input;
796 chip->chip.direction_output = samsung_gpiolib_2bit_output;
799 chip->config = &samsung_gpio_cfgs[7];
801 chip->pm = __gpio_pm(&samsung_gpio_pm_2bit);
802 if ((base != NULL) && (chip->base == NULL))
803 chip->base = base + ((i) * offset);
805 samsung_gpiolib_add(chip);
810 * samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config.
811 * @chip: The gpio chip that is being configured.
812 * @nr_chips: The no of chips (gpio ports) for the GPIO being configured.
814 * This helper deal with the GPIO cases where the control register has 4 bits
815 * of control per GPIO, generally in the form of:
818 * others = Special functions (dependent on bank)
820 * Note, since the code to deal with the case where there are two control
821 * registers instead of one, we do not have a separate set of function
822 * (samsung_gpiolib_add_4bit2_chips)for each case.
825 static void __init samsung_gpiolib_add_4bit_chips(struct samsung_gpio_chip *chip,
826 int nr_chips, void __iomem *base)
830 for (i = 0 ; i < nr_chips; i++, chip++) {
831 chip->chip.direction_input = samsung_gpiolib_4bit_input;
832 chip->chip.direction_output = samsung_gpiolib_4bit_output;
835 chip->config = &samsung_gpio_cfgs[2];
837 chip->pm = __gpio_pm(&samsung_gpio_pm_4bit);
838 if ((base != NULL) && (chip->base == NULL))
839 chip->base = base + ((i) * 0x20);
841 chip->bitmap_gpio_int = 0;
843 samsung_gpiolib_add(chip);
847 static void __init samsung_gpiolib_add_4bit2_chips(struct samsung_gpio_chip *chip,
850 for (; nr_chips > 0; nr_chips--, chip++) {
851 chip->chip.direction_input = samsung_gpiolib_4bit2_input;
852 chip->chip.direction_output = samsung_gpiolib_4bit2_output;
855 chip->config = &samsung_gpio_cfgs[2];
857 chip->pm = __gpio_pm(&samsung_gpio_pm_4bit);
859 samsung_gpiolib_add(chip);
863 int samsung_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset)
865 struct samsung_gpio_chip *samsung_chip = container_of(chip, struct samsung_gpio_chip, chip);
867 return samsung_chip->irq_base + offset;
870 #ifdef CONFIG_PLAT_S3C24XX
871 static int s3c24xx_gpiolib_fbank_to_irq(struct gpio_chip *chip, unsigned offset)
874 if (soc_is_s3c2412())
875 return IRQ_EINT0_2412 + offset;
877 return IRQ_EINT0 + offset;
881 return IRQ_EINT4 + offset - 4;
887 #ifdef CONFIG_ARCH_S3C64XX
888 static int s3c64xx_gpiolib_mbank_to_irq(struct gpio_chip *chip, unsigned pin)
890 return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO;
893 static int s3c64xx_gpiolib_lbank_to_irq(struct gpio_chip *chip, unsigned pin)
895 return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO;
899 struct samsung_gpio_chip s3c24xx_gpios[] = {
900 #ifdef CONFIG_PLAT_S3C24XX
902 .config = &s3c24xx_gpiocfg_banka,
904 .base = S3C2410_GPA(0),
905 .owner = THIS_MODULE,
908 .direction_input = s3c24xx_gpiolib_banka_input,
909 .direction_output = s3c24xx_gpiolib_banka_output,
913 .base = S3C2410_GPB(0),
914 .owner = THIS_MODULE,
920 .base = S3C2410_GPC(0),
921 .owner = THIS_MODULE,
927 .base = S3C2410_GPD(0),
928 .owner = THIS_MODULE,
934 .base = S3C2410_GPE(0),
936 .owner = THIS_MODULE,
941 .base = S3C2410_GPF(0),
942 .owner = THIS_MODULE,
945 .to_irq = s3c24xx_gpiolib_fbank_to_irq,
948 .irq_base = IRQ_EINT8,
950 .base = S3C2410_GPG(0),
951 .owner = THIS_MODULE,
954 .to_irq = samsung_gpiolib_to_irq,
958 .base = S3C2410_GPH(0),
959 .owner = THIS_MODULE,
964 /* GPIOS for the S3C2443 and later devices. */
966 .base = S3C2440_GPJCON,
968 .base = S3C2410_GPJ(0),
969 .owner = THIS_MODULE,
974 .base = S3C2443_GPKCON,
976 .base = S3C2410_GPK(0),
977 .owner = THIS_MODULE,
982 .base = S3C2443_GPLCON,
984 .base = S3C2410_GPL(0),
985 .owner = THIS_MODULE,
990 .base = S3C2443_GPMCON,
992 .base = S3C2410_GPM(0),
993 .owner = THIS_MODULE,
1002 * GPIO bank summary:
1004 * Bank GPIOs Style SlpCon ExtInt Group
1010 * F 16 2Bit Yes 4 [1]
1012 * H 10 4Bit[2] Yes 6
1013 * I 16 2Bit Yes None
1014 * J 12 2Bit Yes None
1015 * K 16 4Bit[2] No None
1016 * L 15 4Bit[2] No None
1017 * M 6 4Bit No IRQ_EINT
1018 * N 16 2Bit No IRQ_EINT
1023 * [1] BANKF pins 14,15 do not form part of the external interrupt sources
1024 * [2] BANK has two control registers, GPxCON0 and GPxCON1
1027 static struct samsung_gpio_chip s3c64xx_gpios_4bit[] = {
1028 #ifdef CONFIG_ARCH_S3C64XX
1031 .base = S3C64XX_GPA(0),
1032 .ngpio = S3C64XX_GPIO_A_NR,
1037 .base = S3C64XX_GPB(0),
1038 .ngpio = S3C64XX_GPIO_B_NR,
1043 .base = S3C64XX_GPC(0),
1044 .ngpio = S3C64XX_GPIO_C_NR,
1049 .base = S3C64XX_GPD(0),
1050 .ngpio = S3C64XX_GPIO_D_NR,
1054 .config = &samsung_gpio_cfgs[0],
1056 .base = S3C64XX_GPE(0),
1057 .ngpio = S3C64XX_GPIO_E_NR,
1061 .base = S3C64XX_GPG_BASE,
1063 .base = S3C64XX_GPG(0),
1064 .ngpio = S3C64XX_GPIO_G_NR,
1068 .base = S3C64XX_GPM_BASE,
1069 .config = &samsung_gpio_cfgs[1],
1071 .base = S3C64XX_GPM(0),
1072 .ngpio = S3C64XX_GPIO_M_NR,
1074 .to_irq = s3c64xx_gpiolib_mbank_to_irq,
1080 static struct samsung_gpio_chip s3c64xx_gpios_4bit2[] = {
1081 #ifdef CONFIG_ARCH_S3C64XX
1083 .base = S3C64XX_GPH_BASE + 0x4,
1085 .base = S3C64XX_GPH(0),
1086 .ngpio = S3C64XX_GPIO_H_NR,
1090 .base = S3C64XX_GPK_BASE + 0x4,
1091 .config = &samsung_gpio_cfgs[0],
1093 .base = S3C64XX_GPK(0),
1094 .ngpio = S3C64XX_GPIO_K_NR,
1098 .base = S3C64XX_GPL_BASE + 0x4,
1099 .config = &samsung_gpio_cfgs[1],
1101 .base = S3C64XX_GPL(0),
1102 .ngpio = S3C64XX_GPIO_L_NR,
1104 .to_irq = s3c64xx_gpiolib_lbank_to_irq,
1110 static struct samsung_gpio_chip s3c64xx_gpios_2bit[] = {
1111 #ifdef CONFIG_ARCH_S3C64XX
1113 .base = S3C64XX_GPF_BASE,
1114 .config = &samsung_gpio_cfgs[6],
1116 .base = S3C64XX_GPF(0),
1117 .ngpio = S3C64XX_GPIO_F_NR,
1121 .config = &samsung_gpio_cfgs[7],
1123 .base = S3C64XX_GPI(0),
1124 .ngpio = S3C64XX_GPIO_I_NR,
1128 .config = &samsung_gpio_cfgs[7],
1130 .base = S3C64XX_GPJ(0),
1131 .ngpio = S3C64XX_GPIO_J_NR,
1135 .config = &samsung_gpio_cfgs[6],
1137 .base = S3C64XX_GPO(0),
1138 .ngpio = S3C64XX_GPIO_O_NR,
1142 .config = &samsung_gpio_cfgs[6],
1144 .base = S3C64XX_GPP(0),
1145 .ngpio = S3C64XX_GPIO_P_NR,
1149 .config = &samsung_gpio_cfgs[6],
1151 .base = S3C64XX_GPQ(0),
1152 .ngpio = S3C64XX_GPIO_Q_NR,
1156 .base = S3C64XX_GPN_BASE,
1157 .irq_base = IRQ_EINT(0),
1158 .config = &samsung_gpio_cfgs[5],
1160 .base = S3C64XX_GPN(0),
1161 .ngpio = S3C64XX_GPIO_N_NR,
1163 .to_irq = samsung_gpiolib_to_irq,
1169 /* TODO: cleanup soc_is_* */
1170 static __init int samsung_gpiolib_init(void)
1173 * Currently there are two drivers that can provide GPIO support for
1174 * Samsung SoCs. For device tree enabled platforms, the new
1175 * pinctrl-samsung driver is used, providing both GPIO and pin control
1176 * interfaces. For legacy (non-DT) platforms this driver is used.
1178 if (of_have_populated_dt())
1181 samsung_gpiolib_set_cfg(samsung_gpio_cfgs, ARRAY_SIZE(samsung_gpio_cfgs));
1183 if (soc_is_s3c24xx()) {
1184 s3c24xx_gpiolib_add_chips(s3c24xx_gpios,
1185 ARRAY_SIZE(s3c24xx_gpios), S3C24XX_VA_GPIO);
1186 } else if (soc_is_s3c64xx()) {
1187 samsung_gpiolib_add_2bit_chips(s3c64xx_gpios_2bit,
1188 ARRAY_SIZE(s3c64xx_gpios_2bit),
1189 S3C64XX_VA_GPIO + 0xE0, 0x20);
1190 samsung_gpiolib_add_4bit_chips(s3c64xx_gpios_4bit,
1191 ARRAY_SIZE(s3c64xx_gpios_4bit),
1193 samsung_gpiolib_add_4bit2_chips(s3c64xx_gpios_4bit2,
1194 ARRAY_SIZE(s3c64xx_gpios_4bit2));
1196 WARN(1, "Unknown SoC in gpio-samsung, no GPIOs added\n");
1202 core_initcall(samsung_gpiolib_init);
1204 int s3c_gpio_cfgpin(unsigned int pin, unsigned int config)
1206 struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
1207 unsigned long flags;
1214 offset = pin - chip->chip.base;
1216 samsung_gpio_lock(chip, flags);
1217 ret = samsung_gpio_do_setcfg(chip, offset, config);
1218 samsung_gpio_unlock(chip, flags);
1222 EXPORT_SYMBOL(s3c_gpio_cfgpin);
1224 int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr,
1229 for (; nr > 0; nr--, start++) {
1230 ret = s3c_gpio_cfgpin(start, cfg);
1237 EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range);
1239 int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr,
1240 unsigned int cfg, samsung_gpio_pull_t pull)
1244 for (; nr > 0; nr--, start++) {
1245 s3c_gpio_setpull(start, pull);
1246 ret = s3c_gpio_cfgpin(start, cfg);
1253 EXPORT_SYMBOL_GPL(s3c_gpio_cfgall_range);
1255 unsigned s3c_gpio_getcfg(unsigned int pin)
1257 struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
1258 unsigned long flags;
1263 offset = pin - chip->chip.base;
1265 samsung_gpio_lock(chip, flags);
1266 ret = samsung_gpio_do_getcfg(chip, offset);
1267 samsung_gpio_unlock(chip, flags);
1272 EXPORT_SYMBOL(s3c_gpio_getcfg);
1274 int s3c_gpio_setpull(unsigned int pin, samsung_gpio_pull_t pull)
1276 struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
1277 unsigned long flags;
1283 offset = pin - chip->chip.base;
1285 samsung_gpio_lock(chip, flags);
1286 ret = samsung_gpio_do_setpull(chip, offset, pull);
1287 samsung_gpio_unlock(chip, flags);
1291 EXPORT_SYMBOL(s3c_gpio_setpull);
1293 samsung_gpio_pull_t s3c_gpio_getpull(unsigned int pin)
1295 struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
1296 unsigned long flags;
1301 offset = pin - chip->chip.base;
1303 samsung_gpio_lock(chip, flags);
1304 pup = samsung_gpio_do_getpull(chip, offset);
1305 samsung_gpio_unlock(chip, flags);
1308 return (__force samsung_gpio_pull_t)pup;
1310 EXPORT_SYMBOL(s3c_gpio_getpull);
1312 #ifdef CONFIG_PLAT_S3C24XX
1313 unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
1315 unsigned long flags;
1316 unsigned long misccr;
1318 local_irq_save(flags);
1319 misccr = __raw_readl(S3C24XX_MISCCR);
1322 __raw_writel(misccr, S3C24XX_MISCCR);
1323 local_irq_restore(flags);
1327 EXPORT_SYMBOL(s3c2410_modify_misccr);