2 * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com/
5 * Copyright 2008 Openmoko, Inc.
6 * Copyright 2008 Simtec Electronics
7 * Ben Dooks <ben@simtec.co.uk>
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>
36 #if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S3C64XX)
37 #include <mach/gpio-samsung.h>
41 #include <plat/gpio-core.h>
42 #include <plat/gpio-cfg.h>
43 #include <plat/gpio-cfg-helpers.h>
46 int samsung_gpio_setpull_updown(struct samsung_gpio_chip
*chip
,
47 unsigned int off
, samsung_gpio_pull_t pull
)
49 void __iomem
*reg
= chip
->base
+ 0x08;
53 pup
= __raw_readl(reg
);
56 __raw_writel(pup
, reg
);
61 samsung_gpio_pull_t
samsung_gpio_getpull_updown(struct samsung_gpio_chip
*chip
,
64 void __iomem
*reg
= chip
->base
+ 0x08;
66 u32 pup
= __raw_readl(reg
);
71 return (__force samsung_gpio_pull_t
)pup
;
74 int s3c2443_gpio_setpull(struct samsung_gpio_chip
*chip
,
75 unsigned int off
, samsung_gpio_pull_t pull
)
78 case S3C_GPIO_PULL_NONE
:
81 case S3C_GPIO_PULL_UP
:
84 case S3C_GPIO_PULL_DOWN
:
88 return samsung_gpio_setpull_updown(chip
, off
, pull
);
91 samsung_gpio_pull_t
s3c2443_gpio_getpull(struct samsung_gpio_chip
*chip
,
94 samsung_gpio_pull_t pull
;
96 pull
= samsung_gpio_getpull_updown(chip
, off
);
100 pull
= S3C_GPIO_PULL_UP
;
104 pull
= S3C_GPIO_PULL_NONE
;
107 pull
= S3C_GPIO_PULL_DOWN
;
114 static int s3c24xx_gpio_setpull_1(struct samsung_gpio_chip
*chip
,
115 unsigned int off
, samsung_gpio_pull_t pull
,
116 samsung_gpio_pull_t updown
)
118 void __iomem
*reg
= chip
->base
+ 0x08;
119 u32 pup
= __raw_readl(reg
);
123 else if (pull
== S3C_GPIO_PULL_NONE
)
128 __raw_writel(pup
, reg
);
132 static samsung_gpio_pull_t
s3c24xx_gpio_getpull_1(struct samsung_gpio_chip
*chip
,
134 samsung_gpio_pull_t updown
)
136 void __iomem
*reg
= chip
->base
+ 0x08;
137 u32 pup
= __raw_readl(reg
);
140 return pup
? S3C_GPIO_PULL_NONE
: updown
;
143 samsung_gpio_pull_t
s3c24xx_gpio_getpull_1up(struct samsung_gpio_chip
*chip
,
146 return s3c24xx_gpio_getpull_1(chip
, off
, S3C_GPIO_PULL_UP
);
149 int s3c24xx_gpio_setpull_1up(struct samsung_gpio_chip
*chip
,
150 unsigned int off
, samsung_gpio_pull_t pull
)
152 return s3c24xx_gpio_setpull_1(chip
, off
, pull
, S3C_GPIO_PULL_UP
);
155 samsung_gpio_pull_t
s3c24xx_gpio_getpull_1down(struct samsung_gpio_chip
*chip
,
158 return s3c24xx_gpio_getpull_1(chip
, off
, S3C_GPIO_PULL_DOWN
);
161 int s3c24xx_gpio_setpull_1down(struct samsung_gpio_chip
*chip
,
162 unsigned int off
, samsung_gpio_pull_t pull
)
164 return s3c24xx_gpio_setpull_1(chip
, off
, pull
, S3C_GPIO_PULL_DOWN
);
168 * samsung_gpio_setcfg_2bit - Samsung 2bit style GPIO configuration.
169 * @chip: The gpio chip that is being configured.
170 * @off: The offset for the GPIO being configured.
171 * @cfg: The configuration value to set.
173 * This helper deal with the GPIO cases where the control register
174 * has two bits of configuration per gpio, which have the following
178 * 1x = special function
181 static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip
*chip
,
182 unsigned int off
, unsigned int cfg
)
184 void __iomem
*reg
= chip
->base
;
185 unsigned int shift
= off
* 2;
188 if (samsung_gpio_is_cfg_special(cfg
)) {
196 con
= __raw_readl(reg
);
197 con
&= ~(0x3 << shift
);
199 __raw_writel(con
, reg
);
205 * samsung_gpio_getcfg_2bit - Samsung 2bit style GPIO configuration read.
206 * @chip: The gpio chip that is being configured.
207 * @off: The offset for the GPIO being configured.
209 * The reverse of samsung_gpio_setcfg_2bit(). Will return a value which
210 * could be directly passed back to samsung_gpio_setcfg_2bit(), from the
211 * S3C_GPIO_SPECIAL() macro.
214 static unsigned int samsung_gpio_getcfg_2bit(struct samsung_gpio_chip
*chip
,
219 con
= __raw_readl(chip
->base
);
223 /* this conversion works for IN and OUT as well as special mode */
224 return S3C_GPIO_SPECIAL(con
);
228 * samsung_gpio_setcfg_4bit - Samsung 4bit single register GPIO config.
229 * @chip: The gpio chip that is being configured.
230 * @off: The offset for the GPIO being configured.
231 * @cfg: The configuration value to set.
233 * This helper deal with the GPIO cases where the control register has 4 bits
234 * of control per GPIO, generally in the form of:
237 * others = Special functions (dependent on bank)
239 * Note, since the code to deal with the case where there are two control
240 * registers instead of one, we do not have a separate set of functions for
244 static int samsung_gpio_setcfg_4bit(struct samsung_gpio_chip
*chip
,
245 unsigned int off
, unsigned int cfg
)
247 void __iomem
*reg
= chip
->base
;
248 unsigned int shift
= (off
& 7) * 4;
251 if (off
< 8 && chip
->chip
.ngpio
> 8)
254 if (samsung_gpio_is_cfg_special(cfg
)) {
259 con
= __raw_readl(reg
);
260 con
&= ~(0xf << shift
);
262 __raw_writel(con
, reg
);
268 * samsung_gpio_getcfg_4bit - Samsung 4bit single register GPIO config read.
269 * @chip: The gpio chip that is being configured.
270 * @off: The offset for the GPIO being configured.
272 * The reverse of samsung_gpio_setcfg_4bit(), turning a gpio configuration
273 * register setting into a value the software can use, such as could be passed
274 * to samsung_gpio_setcfg_4bit().
276 * @sa samsung_gpio_getcfg_2bit
279 static unsigned samsung_gpio_getcfg_4bit(struct samsung_gpio_chip
*chip
,
282 void __iomem
*reg
= chip
->base
;
283 unsigned int shift
= (off
& 7) * 4;
286 if (off
< 8 && chip
->chip
.ngpio
> 8)
289 con
= __raw_readl(reg
);
293 /* this conversion works for IN and OUT as well as special mode */
294 return S3C_GPIO_SPECIAL(con
);
297 #ifdef CONFIG_PLAT_S3C24XX
299 * s3c24xx_gpio_setcfg_abank - S3C24XX style GPIO configuration (Bank A)
300 * @chip: The gpio chip that is being configured.
301 * @off: The offset for the GPIO being configured.
302 * @cfg: The configuration value to set.
304 * This helper deal with the GPIO cases where the control register
305 * has one bit of configuration for the gpio, where setting the bit
306 * means the pin is in special function mode and unset means output.
309 static int s3c24xx_gpio_setcfg_abank(struct samsung_gpio_chip
*chip
,
310 unsigned int off
, unsigned int cfg
)
312 void __iomem
*reg
= chip
->base
;
313 unsigned int shift
= off
;
316 if (samsung_gpio_is_cfg_special(cfg
)) {
319 /* Map output to 0, and SFN2 to 1 */
327 con
= __raw_readl(reg
);
328 con
&= ~(0x1 << shift
);
330 __raw_writel(con
, reg
);
336 * s3c24xx_gpio_getcfg_abank - S3C24XX style GPIO configuration read (Bank A)
337 * @chip: The gpio chip that is being configured.
338 * @off: The offset for the GPIO being configured.
340 * The reverse of s3c24xx_gpio_setcfg_abank() turning an GPIO into a usable
341 * GPIO configuration value.
343 * @sa samsung_gpio_getcfg_2bit
344 * @sa samsung_gpio_getcfg_4bit
347 static unsigned s3c24xx_gpio_getcfg_abank(struct samsung_gpio_chip
*chip
,
352 con
= __raw_readl(chip
->base
);
357 return S3C_GPIO_SFN(con
);
361 static void __init
samsung_gpiolib_set_cfg(struct samsung_gpio_cfg
*chipcfg
,
364 for (; nr_chips
> 0; nr_chips
--, chipcfg
++) {
365 if (!chipcfg
->set_config
)
366 chipcfg
->set_config
= samsung_gpio_setcfg_4bit
;
367 if (!chipcfg
->get_config
)
368 chipcfg
->get_config
= samsung_gpio_getcfg_4bit
;
369 if (!chipcfg
->set_pull
)
370 chipcfg
->set_pull
= samsung_gpio_setpull_updown
;
371 if (!chipcfg
->get_pull
)
372 chipcfg
->get_pull
= samsung_gpio_getpull_updown
;
376 struct samsung_gpio_cfg s3c24xx_gpiocfg_default
= {
377 .set_config
= samsung_gpio_setcfg_2bit
,
378 .get_config
= samsung_gpio_getcfg_2bit
,
381 #ifdef CONFIG_PLAT_S3C24XX
382 static struct samsung_gpio_cfg s3c24xx_gpiocfg_banka
= {
383 .set_config
= s3c24xx_gpio_setcfg_abank
,
384 .get_config
= s3c24xx_gpio_getcfg_abank
,
388 static struct samsung_gpio_cfg samsung_gpio_cfgs
[] = {
403 .set_config
= samsung_gpio_setcfg_2bit
,
404 .get_config
= samsung_gpio_getcfg_2bit
,
408 .set_config
= samsung_gpio_setcfg_2bit
,
409 .get_config
= samsung_gpio_getcfg_2bit
,
413 .set_config
= samsung_gpio_setcfg_2bit
,
414 .get_config
= samsung_gpio_getcfg_2bit
,
417 .set_config
= samsung_gpio_setcfg_2bit
,
418 .get_config
= samsung_gpio_getcfg_2bit
,
423 * Default routines for controlling GPIO, based on the original S3C24XX
424 * GPIO functions which deal with the case where each gpio bank of the
425 * chip is as following:
427 * base + 0x00: Control register, 2 bits per gpio
428 * gpio n: 2 bits starting at (2*n)
429 * 00 = input, 01 = output, others mean special-function
430 * base + 0x04: Data register, 1 bit per gpio
434 static int samsung_gpiolib_2bit_input(struct gpio_chip
*chip
, unsigned offset
)
436 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
437 void __iomem
*base
= ourchip
->base
;
441 samsung_gpio_lock(ourchip
, flags
);
443 con
= __raw_readl(base
+ 0x00);
444 con
&= ~(3 << (offset
* 2));
446 __raw_writel(con
, base
+ 0x00);
448 samsung_gpio_unlock(ourchip
, flags
);
452 static int samsung_gpiolib_2bit_output(struct gpio_chip
*chip
,
453 unsigned offset
, int value
)
455 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
456 void __iomem
*base
= ourchip
->base
;
461 samsung_gpio_lock(ourchip
, flags
);
463 dat
= __raw_readl(base
+ 0x04);
464 dat
&= ~(1 << offset
);
467 __raw_writel(dat
, base
+ 0x04);
469 con
= __raw_readl(base
+ 0x00);
470 con
&= ~(3 << (offset
* 2));
471 con
|= 1 << (offset
* 2);
473 __raw_writel(con
, base
+ 0x00);
474 __raw_writel(dat
, base
+ 0x04);
476 samsung_gpio_unlock(ourchip
, flags
);
481 * The samsung_gpiolib_4bit routines are to control the gpio banks where
482 * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the
485 * base + 0x00: Control register, 4 bits per gpio
486 * gpio n: 4 bits starting at (4*n)
487 * 0000 = input, 0001 = output, others mean special-function
488 * base + 0x04: Data register, 1 bit per gpio
491 * Note, since the data register is one bit per gpio and is at base + 0x4
492 * we can use samsung_gpiolib_get and samsung_gpiolib_set to change the
493 * state of the output.
496 static int samsung_gpiolib_4bit_input(struct gpio_chip
*chip
,
499 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
500 void __iomem
*base
= ourchip
->base
;
503 con
= __raw_readl(base
+ GPIOCON_OFF
);
504 if (ourchip
->bitmap_gpio_int
& BIT(offset
))
505 con
|= 0xf << con_4bit_shift(offset
);
507 con
&= ~(0xf << con_4bit_shift(offset
));
508 __raw_writel(con
, base
+ GPIOCON_OFF
);
510 pr_debug("%s: %p: CON now %08lx\n", __func__
, base
, con
);
515 static int samsung_gpiolib_4bit_output(struct gpio_chip
*chip
,
516 unsigned int offset
, int value
)
518 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
519 void __iomem
*base
= ourchip
->base
;
523 con
= __raw_readl(base
+ GPIOCON_OFF
);
524 con
&= ~(0xf << con_4bit_shift(offset
));
525 con
|= 0x1 << con_4bit_shift(offset
);
527 dat
= __raw_readl(base
+ GPIODAT_OFF
);
532 dat
&= ~(1 << offset
);
534 __raw_writel(dat
, base
+ GPIODAT_OFF
);
535 __raw_writel(con
, base
+ GPIOCON_OFF
);
536 __raw_writel(dat
, base
+ GPIODAT_OFF
);
538 pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__
, base
, con
, dat
);
544 * The next set of routines are for the case where the GPIO configuration
545 * registers are 4 bits per GPIO but there is more than one register (the
546 * bank has more than 8 GPIOs.
548 * This case is the similar to the 4 bit case, but the registers are as
551 * base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs)
552 * gpio n: 4 bits starting at (4*n)
553 * 0000 = input, 0001 = output, others mean special-function
554 * base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs)
555 * gpio n: 4 bits starting at (4*n)
556 * 0000 = input, 0001 = output, others mean special-function
557 * base + 0x08: Data register, 1 bit per gpio
560 * To allow us to use the samsung_gpiolib_get and samsung_gpiolib_set
561 * routines we store the 'base + 0x4' address so that these routines see
562 * the data register at ourchip->base + 0x04.
565 static int samsung_gpiolib_4bit2_input(struct gpio_chip
*chip
,
568 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
569 void __iomem
*base
= ourchip
->base
;
570 void __iomem
*regcon
= base
;
578 con
= __raw_readl(regcon
);
579 con
&= ~(0xf << con_4bit_shift(offset
));
580 __raw_writel(con
, regcon
);
582 pr_debug("%s: %p: CON %08lx\n", __func__
, base
, con
);
587 static int samsung_gpiolib_4bit2_output(struct gpio_chip
*chip
,
588 unsigned int offset
, int value
)
590 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
591 void __iomem
*base
= ourchip
->base
;
592 void __iomem
*regcon
= base
;
595 unsigned con_offset
= offset
;
602 con
= __raw_readl(regcon
);
603 con
&= ~(0xf << con_4bit_shift(con_offset
));
604 con
|= 0x1 << con_4bit_shift(con_offset
);
606 dat
= __raw_readl(base
+ GPIODAT_OFF
);
611 dat
&= ~(1 << offset
);
613 __raw_writel(dat
, base
+ GPIODAT_OFF
);
614 __raw_writel(con
, regcon
);
615 __raw_writel(dat
, base
+ GPIODAT_OFF
);
617 pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__
, base
, con
, dat
);
622 #ifdef CONFIG_PLAT_S3C24XX
623 /* The next set of routines are for the case of s3c24xx bank a */
625 static int s3c24xx_gpiolib_banka_input(struct gpio_chip
*chip
, unsigned offset
)
630 static int s3c24xx_gpiolib_banka_output(struct gpio_chip
*chip
,
631 unsigned offset
, int value
)
633 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
634 void __iomem
*base
= ourchip
->base
;
639 local_irq_save(flags
);
641 con
= __raw_readl(base
+ 0x00);
642 dat
= __raw_readl(base
+ 0x04);
644 dat
&= ~(1 << offset
);
648 __raw_writel(dat
, base
+ 0x04);
650 con
&= ~(1 << offset
);
652 __raw_writel(con
, base
+ 0x00);
653 __raw_writel(dat
, base
+ 0x04);
655 local_irq_restore(flags
);
660 static void samsung_gpiolib_set(struct gpio_chip
*chip
,
661 unsigned offset
, int value
)
663 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
664 void __iomem
*base
= ourchip
->base
;
668 samsung_gpio_lock(ourchip
, flags
);
670 dat
= __raw_readl(base
+ 0x04);
671 dat
&= ~(1 << offset
);
674 __raw_writel(dat
, base
+ 0x04);
676 samsung_gpio_unlock(ourchip
, flags
);
679 static int samsung_gpiolib_get(struct gpio_chip
*chip
, unsigned offset
)
681 struct samsung_gpio_chip
*ourchip
= to_samsung_gpio(chip
);
684 val
= __raw_readl(ourchip
->base
+ 0x04);
692 * CONFIG_S3C_GPIO_TRACK enables the tracking of the s3c specific gpios
693 * for use with the configuration calls, and other parts of the s3c gpiolib
696 * Not all s3c support code will need this, as some configurations of cpu
697 * may only support one or two different configuration options and have an
698 * easy gpio to samsung_gpio_chip mapping function. If this is the case, then
699 * the machine support file should provide its own samsung_gpiolib_getchip()
700 * and any other necessary functions.
703 #ifdef CONFIG_S3C_GPIO_TRACK
704 struct samsung_gpio_chip
*s3c_gpios
[S3C_GPIO_END
];
706 static __init
void s3c_gpiolib_track(struct samsung_gpio_chip
*chip
)
711 gpn
= chip
->chip
.base
;
712 for (i
= 0; i
< chip
->chip
.ngpio
; i
++, gpn
++) {
713 BUG_ON(gpn
>= ARRAY_SIZE(s3c_gpios
));
714 s3c_gpios
[gpn
] = chip
;
717 #endif /* CONFIG_S3C_GPIO_TRACK */
720 * samsung_gpiolib_add() - add the Samsung gpio_chip.
721 * @chip: The chip to register
723 * This is a wrapper to gpiochip_add() that takes our specific gpio chip
724 * information and makes the necessary alterations for the platform and
725 * notes the information for use with the configuration systems and any
726 * other parts of the system.
729 static void __init
samsung_gpiolib_add(struct samsung_gpio_chip
*chip
)
731 struct gpio_chip
*gc
= &chip
->chip
;
738 spin_lock_init(&chip
->lock
);
740 if (!gc
->direction_input
)
741 gc
->direction_input
= samsung_gpiolib_2bit_input
;
742 if (!gc
->direction_output
)
743 gc
->direction_output
= samsung_gpiolib_2bit_output
;
745 gc
->set
= samsung_gpiolib_set
;
747 gc
->get
= samsung_gpiolib_get
;
750 if (chip
->pm
!= NULL
) {
751 if (!chip
->pm
->save
|| !chip
->pm
->resume
)
752 pr_err("gpio: %s has missing PM functions\n",
755 pr_err("gpio: %s has no PM function\n", gc
->label
);
758 /* gpiochip_add() prints own failure message on error. */
759 ret
= gpiochip_add(gc
);
761 s3c_gpiolib_track(chip
);
764 static void __init
s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip
*chip
,
765 int nr_chips
, void __iomem
*base
)
768 struct gpio_chip
*gc
= &chip
->chip
;
770 for (i
= 0 ; i
< nr_chips
; i
++, chip
++) {
771 /* skip banks not present on SoC */
772 if (chip
->chip
.base
>= S3C_GPIO_END
)
776 chip
->config
= &s3c24xx_gpiocfg_default
;
778 chip
->pm
= __gpio_pm(&samsung_gpio_pm_2bit
);
779 if ((base
!= NULL
) && (chip
->base
== NULL
))
780 chip
->base
= base
+ ((i
) * 0x10);
782 if (!gc
->direction_input
)
783 gc
->direction_input
= samsung_gpiolib_2bit_input
;
784 if (!gc
->direction_output
)
785 gc
->direction_output
= samsung_gpiolib_2bit_output
;
787 samsung_gpiolib_add(chip
);
791 static void __init
samsung_gpiolib_add_2bit_chips(struct samsung_gpio_chip
*chip
,
792 int nr_chips
, void __iomem
*base
,
797 for (i
= 0 ; i
< nr_chips
; i
++, chip
++) {
798 chip
->chip
.direction_input
= samsung_gpiolib_2bit_input
;
799 chip
->chip
.direction_output
= samsung_gpiolib_2bit_output
;
802 chip
->config
= &samsung_gpio_cfgs
[7];
804 chip
->pm
= __gpio_pm(&samsung_gpio_pm_2bit
);
805 if ((base
!= NULL
) && (chip
->base
== NULL
))
806 chip
->base
= base
+ ((i
) * offset
);
808 samsung_gpiolib_add(chip
);
813 * samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config.
814 * @chip: The gpio chip that is being configured.
815 * @nr_chips: The no of chips (gpio ports) for the GPIO being configured.
817 * This helper deal with the GPIO cases where the control register has 4 bits
818 * of control per GPIO, generally in the form of:
821 * others = Special functions (dependent on bank)
823 * Note, since the code to deal with the case where there are two control
824 * registers instead of one, we do not have a separate set of function
825 * (samsung_gpiolib_add_4bit2_chips)for each case.
828 static void __init
samsung_gpiolib_add_4bit_chips(struct samsung_gpio_chip
*chip
,
829 int nr_chips
, void __iomem
*base
)
833 for (i
= 0 ; i
< nr_chips
; i
++, chip
++) {
834 chip
->chip
.direction_input
= samsung_gpiolib_4bit_input
;
835 chip
->chip
.direction_output
= samsung_gpiolib_4bit_output
;
838 chip
->config
= &samsung_gpio_cfgs
[2];
840 chip
->pm
= __gpio_pm(&samsung_gpio_pm_4bit
);
841 if ((base
!= NULL
) && (chip
->base
== NULL
))
842 chip
->base
= base
+ ((i
) * 0x20);
844 chip
->bitmap_gpio_int
= 0;
846 samsung_gpiolib_add(chip
);
850 static void __init
samsung_gpiolib_add_4bit2_chips(struct samsung_gpio_chip
*chip
,
853 for (; nr_chips
> 0; nr_chips
--, chip
++) {
854 chip
->chip
.direction_input
= samsung_gpiolib_4bit2_input
;
855 chip
->chip
.direction_output
= samsung_gpiolib_4bit2_output
;
858 chip
->config
= &samsung_gpio_cfgs
[2];
860 chip
->pm
= __gpio_pm(&samsung_gpio_pm_4bit
);
862 samsung_gpiolib_add(chip
);
866 int samsung_gpiolib_to_irq(struct gpio_chip
*chip
, unsigned int offset
)
868 struct samsung_gpio_chip
*samsung_chip
= container_of(chip
, struct samsung_gpio_chip
, chip
);
870 return samsung_chip
->irq_base
+ offset
;
873 #ifdef CONFIG_PLAT_S3C24XX
874 static int s3c24xx_gpiolib_fbank_to_irq(struct gpio_chip
*chip
, unsigned offset
)
877 if (soc_is_s3c2412())
878 return IRQ_EINT0_2412
+ offset
;
880 return IRQ_EINT0
+ offset
;
884 return IRQ_EINT4
+ offset
- 4;
890 #ifdef CONFIG_ARCH_S3C64XX
891 static int s3c64xx_gpiolib_mbank_to_irq(struct gpio_chip
*chip
, unsigned pin
)
893 return pin
< 5 ? IRQ_EINT(23) + pin
: -ENXIO
;
896 static int s3c64xx_gpiolib_lbank_to_irq(struct gpio_chip
*chip
, unsigned pin
)
898 return pin
>= 8 ? IRQ_EINT(16) + pin
- 8 : -ENXIO
;
902 struct samsung_gpio_chip s3c24xx_gpios
[] = {
903 #ifdef CONFIG_PLAT_S3C24XX
905 .config
= &s3c24xx_gpiocfg_banka
,
907 .base
= S3C2410_GPA(0),
908 .owner
= THIS_MODULE
,
911 .direction_input
= s3c24xx_gpiolib_banka_input
,
912 .direction_output
= s3c24xx_gpiolib_banka_output
,
916 .base
= S3C2410_GPB(0),
917 .owner
= THIS_MODULE
,
923 .base
= S3C2410_GPC(0),
924 .owner
= THIS_MODULE
,
930 .base
= S3C2410_GPD(0),
931 .owner
= THIS_MODULE
,
937 .base
= S3C2410_GPE(0),
939 .owner
= THIS_MODULE
,
944 .base
= S3C2410_GPF(0),
945 .owner
= THIS_MODULE
,
948 .to_irq
= s3c24xx_gpiolib_fbank_to_irq
,
951 .irq_base
= IRQ_EINT8
,
953 .base
= S3C2410_GPG(0),
954 .owner
= THIS_MODULE
,
957 .to_irq
= samsung_gpiolib_to_irq
,
961 .base
= S3C2410_GPH(0),
962 .owner
= THIS_MODULE
,
967 /* GPIOS for the S3C2443 and later devices. */
969 .base
= S3C2440_GPJCON
,
971 .base
= S3C2410_GPJ(0),
972 .owner
= THIS_MODULE
,
977 .base
= S3C2443_GPKCON
,
979 .base
= S3C2410_GPK(0),
980 .owner
= THIS_MODULE
,
985 .base
= S3C2443_GPLCON
,
987 .base
= S3C2410_GPL(0),
988 .owner
= THIS_MODULE
,
993 .base
= S3C2443_GPMCON
,
995 .base
= S3C2410_GPM(0),
996 .owner
= THIS_MODULE
,
1005 * GPIO bank summary:
1007 * Bank GPIOs Style SlpCon ExtInt Group
1013 * F 16 2Bit Yes 4 [1]
1015 * H 10 4Bit[2] Yes 6
1016 * I 16 2Bit Yes None
1017 * J 12 2Bit Yes None
1018 * K 16 4Bit[2] No None
1019 * L 15 4Bit[2] No None
1020 * M 6 4Bit No IRQ_EINT
1021 * N 16 2Bit No IRQ_EINT
1026 * [1] BANKF pins 14,15 do not form part of the external interrupt sources
1027 * [2] BANK has two control registers, GPxCON0 and GPxCON1
1030 static struct samsung_gpio_chip s3c64xx_gpios_4bit
[] = {
1031 #ifdef CONFIG_ARCH_S3C64XX
1034 .base
= S3C64XX_GPA(0),
1035 .ngpio
= S3C64XX_GPIO_A_NR
,
1040 .base
= S3C64XX_GPB(0),
1041 .ngpio
= S3C64XX_GPIO_B_NR
,
1046 .base
= S3C64XX_GPC(0),
1047 .ngpio
= S3C64XX_GPIO_C_NR
,
1052 .base
= S3C64XX_GPD(0),
1053 .ngpio
= S3C64XX_GPIO_D_NR
,
1057 .config
= &samsung_gpio_cfgs
[0],
1059 .base
= S3C64XX_GPE(0),
1060 .ngpio
= S3C64XX_GPIO_E_NR
,
1064 .base
= S3C64XX_GPG_BASE
,
1066 .base
= S3C64XX_GPG(0),
1067 .ngpio
= S3C64XX_GPIO_G_NR
,
1071 .base
= S3C64XX_GPM_BASE
,
1072 .config
= &samsung_gpio_cfgs
[1],
1074 .base
= S3C64XX_GPM(0),
1075 .ngpio
= S3C64XX_GPIO_M_NR
,
1077 .to_irq
= s3c64xx_gpiolib_mbank_to_irq
,
1083 static struct samsung_gpio_chip s3c64xx_gpios_4bit2
[] = {
1084 #ifdef CONFIG_ARCH_S3C64XX
1086 .base
= S3C64XX_GPH_BASE
+ 0x4,
1088 .base
= S3C64XX_GPH(0),
1089 .ngpio
= S3C64XX_GPIO_H_NR
,
1093 .base
= S3C64XX_GPK_BASE
+ 0x4,
1094 .config
= &samsung_gpio_cfgs
[0],
1096 .base
= S3C64XX_GPK(0),
1097 .ngpio
= S3C64XX_GPIO_K_NR
,
1101 .base
= S3C64XX_GPL_BASE
+ 0x4,
1102 .config
= &samsung_gpio_cfgs
[1],
1104 .base
= S3C64XX_GPL(0),
1105 .ngpio
= S3C64XX_GPIO_L_NR
,
1107 .to_irq
= s3c64xx_gpiolib_lbank_to_irq
,
1113 static struct samsung_gpio_chip s3c64xx_gpios_2bit
[] = {
1114 #ifdef CONFIG_ARCH_S3C64XX
1116 .base
= S3C64XX_GPF_BASE
,
1117 .config
= &samsung_gpio_cfgs
[6],
1119 .base
= S3C64XX_GPF(0),
1120 .ngpio
= S3C64XX_GPIO_F_NR
,
1124 .config
= &samsung_gpio_cfgs
[7],
1126 .base
= S3C64XX_GPI(0),
1127 .ngpio
= S3C64XX_GPIO_I_NR
,
1131 .config
= &samsung_gpio_cfgs
[7],
1133 .base
= S3C64XX_GPJ(0),
1134 .ngpio
= S3C64XX_GPIO_J_NR
,
1138 .config
= &samsung_gpio_cfgs
[6],
1140 .base
= S3C64XX_GPO(0),
1141 .ngpio
= S3C64XX_GPIO_O_NR
,
1145 .config
= &samsung_gpio_cfgs
[6],
1147 .base
= S3C64XX_GPP(0),
1148 .ngpio
= S3C64XX_GPIO_P_NR
,
1152 .config
= &samsung_gpio_cfgs
[6],
1154 .base
= S3C64XX_GPQ(0),
1155 .ngpio
= S3C64XX_GPIO_Q_NR
,
1159 .base
= S3C64XX_GPN_BASE
,
1160 .irq_base
= IRQ_EINT(0),
1161 .config
= &samsung_gpio_cfgs
[5],
1163 .base
= S3C64XX_GPN(0),
1164 .ngpio
= S3C64XX_GPIO_N_NR
,
1166 .to_irq
= samsung_gpiolib_to_irq
,
1172 /* TODO: cleanup soc_is_* */
1173 static __init
int samsung_gpiolib_init(void)
1176 * Currently there are two drivers that can provide GPIO support for
1177 * Samsung SoCs. For device tree enabled platforms, the new
1178 * pinctrl-samsung driver is used, providing both GPIO and pin control
1179 * interfaces. For legacy (non-DT) platforms this driver is used.
1181 if (of_have_populated_dt())
1184 samsung_gpiolib_set_cfg(samsung_gpio_cfgs
, ARRAY_SIZE(samsung_gpio_cfgs
));
1186 if (soc_is_s3c24xx()) {
1187 s3c24xx_gpiolib_add_chips(s3c24xx_gpios
,
1188 ARRAY_SIZE(s3c24xx_gpios
), S3C24XX_VA_GPIO
);
1189 } else if (soc_is_s3c64xx()) {
1190 samsung_gpiolib_add_2bit_chips(s3c64xx_gpios_2bit
,
1191 ARRAY_SIZE(s3c64xx_gpios_2bit
),
1192 S3C64XX_VA_GPIO
+ 0xE0, 0x20);
1193 samsung_gpiolib_add_4bit_chips(s3c64xx_gpios_4bit
,
1194 ARRAY_SIZE(s3c64xx_gpios_4bit
),
1196 samsung_gpiolib_add_4bit2_chips(s3c64xx_gpios_4bit2
,
1197 ARRAY_SIZE(s3c64xx_gpios_4bit2
));
1199 WARN(1, "Unknown SoC in gpio-samsung, no GPIOs added\n");
1205 core_initcall(samsung_gpiolib_init
);
1207 int s3c_gpio_cfgpin(unsigned int pin
, unsigned int config
)
1209 struct samsung_gpio_chip
*chip
= samsung_gpiolib_getchip(pin
);
1210 unsigned long flags
;
1217 offset
= pin
- chip
->chip
.base
;
1219 samsung_gpio_lock(chip
, flags
);
1220 ret
= samsung_gpio_do_setcfg(chip
, offset
, config
);
1221 samsung_gpio_unlock(chip
, flags
);
1225 EXPORT_SYMBOL(s3c_gpio_cfgpin
);
1227 int s3c_gpio_cfgpin_range(unsigned int start
, unsigned int nr
,
1232 for (; nr
> 0; nr
--, start
++) {
1233 ret
= s3c_gpio_cfgpin(start
, cfg
);
1240 EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range
);
1242 int s3c_gpio_cfgall_range(unsigned int start
, unsigned int nr
,
1243 unsigned int cfg
, samsung_gpio_pull_t pull
)
1247 for (; nr
> 0; nr
--, start
++) {
1248 s3c_gpio_setpull(start
, pull
);
1249 ret
= s3c_gpio_cfgpin(start
, cfg
);
1256 EXPORT_SYMBOL_GPL(s3c_gpio_cfgall_range
);
1258 unsigned s3c_gpio_getcfg(unsigned int pin
)
1260 struct samsung_gpio_chip
*chip
= samsung_gpiolib_getchip(pin
);
1261 unsigned long flags
;
1266 offset
= pin
- chip
->chip
.base
;
1268 samsung_gpio_lock(chip
, flags
);
1269 ret
= samsung_gpio_do_getcfg(chip
, offset
);
1270 samsung_gpio_unlock(chip
, flags
);
1275 EXPORT_SYMBOL(s3c_gpio_getcfg
);
1277 int s3c_gpio_setpull(unsigned int pin
, samsung_gpio_pull_t pull
)
1279 struct samsung_gpio_chip
*chip
= samsung_gpiolib_getchip(pin
);
1280 unsigned long flags
;
1286 offset
= pin
- chip
->chip
.base
;
1288 samsung_gpio_lock(chip
, flags
);
1289 ret
= samsung_gpio_do_setpull(chip
, offset
, pull
);
1290 samsung_gpio_unlock(chip
, flags
);
1294 EXPORT_SYMBOL(s3c_gpio_setpull
);
1296 samsung_gpio_pull_t
s3c_gpio_getpull(unsigned int pin
)
1298 struct samsung_gpio_chip
*chip
= samsung_gpiolib_getchip(pin
);
1299 unsigned long flags
;
1304 offset
= pin
- chip
->chip
.base
;
1306 samsung_gpio_lock(chip
, flags
);
1307 pup
= samsung_gpio_do_getpull(chip
, offset
);
1308 samsung_gpio_unlock(chip
, flags
);
1311 return (__force samsung_gpio_pull_t
)pup
;
1313 EXPORT_SYMBOL(s3c_gpio_getpull
);
1315 #ifdef CONFIG_S5P_GPIO_DRVSTR
1316 s5p_gpio_drvstr_t
s5p_gpio_get_drvstr(unsigned int pin
)
1318 struct samsung_gpio_chip
*chip
= samsung_gpiolib_getchip(pin
);
1327 off
= pin
- chip
->chip
.base
;
1329 reg
= chip
->base
+ 0x0C;
1331 drvstr
= __raw_readl(reg
);
1332 drvstr
= drvstr
>> shift
;
1335 return (__force s5p_gpio_drvstr_t
)drvstr
;
1337 EXPORT_SYMBOL(s5p_gpio_get_drvstr
);
1339 int s5p_gpio_set_drvstr(unsigned int pin
, s5p_gpio_drvstr_t drvstr
)
1341 struct samsung_gpio_chip
*chip
= samsung_gpiolib_getchip(pin
);
1350 off
= pin
- chip
->chip
.base
;
1352 reg
= chip
->base
+ 0x0C;
1354 tmp
= __raw_readl(reg
);
1355 tmp
&= ~(0x3 << shift
);
1356 tmp
|= drvstr
<< shift
;
1358 __raw_writel(tmp
, reg
);
1362 EXPORT_SYMBOL(s5p_gpio_set_drvstr
);
1363 #endif /* CONFIG_S5P_GPIO_DRVSTR */
1365 #ifdef CONFIG_PLAT_S3C24XX
1366 unsigned int s3c2410_modify_misccr(unsigned int clear
, unsigned int change
)
1368 unsigned long flags
;
1369 unsigned long misccr
;
1371 local_irq_save(flags
);
1372 misccr
= __raw_readl(S3C24XX_MISCCR
);
1375 __raw_writel(misccr
, S3C24XX_MISCCR
);
1376 local_irq_restore(flags
);
1380 EXPORT_SYMBOL(s3c2410_modify_misccr
);