1 /* linux/arch/arm/plat-s3c24xx/gpio.c
3 * Copyright (c) 2004-2005 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/module.h>
26 #include <linux/interrupt.h>
27 #include <linux/ioport.h>
30 #include <mach/hardware.h>
31 #include <mach/gpio-fns.h>
34 #include <mach/regs-gpio.h>
36 unsigned int s3c2410_gpio_getcfg(unsigned int pin)
38 void __iomem *base = S3C24XX_GPIO_BASE(pin);
39 unsigned long val = __raw_readl(base);
41 if (pin < S3C2410_GPIO_BANKB) {
42 val >>= S3C2410_GPIO_OFFSET(pin);
46 val >>= S3C2410_GPIO_OFFSET(pin)*2;
50 return val | S3C2410_GPIO_INPUT;
53 EXPORT_SYMBOL(s3c2410_gpio_getcfg);
55 void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
57 void __iomem *base = S3C24XX_GPIO_BASE(pin);
58 unsigned long offs = S3C2410_GPIO_OFFSET(pin);
62 if (pin < S3C2410_GPIO_BANKB)
65 local_irq_save(flags);
67 up = __raw_readl(base + 0x08);
70 __raw_writel(up, base + 0x08);
72 local_irq_restore(flags);
75 EXPORT_SYMBOL(s3c2410_gpio_pullup);
78 void s3c2410_gpio_setpin(unsigned int pin, unsigned int to)
80 void __iomem *base = S3C24XX_GPIO_BASE(pin);
81 unsigned long offs = S3C2410_GPIO_OFFSET(pin);
85 local_irq_save(flags);
87 dat = __raw_readl(base + 0x04);
90 __raw_writel(dat, base + 0x04);
92 local_irq_restore(flags);
95 EXPORT_SYMBOL(s3c2410_gpio_setpin);
97 unsigned int s3c2410_gpio_getpin(unsigned int pin)
99 void __iomem *base = S3C24XX_GPIO_BASE(pin);
100 unsigned long offs = S3C2410_GPIO_OFFSET(pin);
102 return __raw_readl(base + 0x04) & (1<< offs);
105 EXPORT_SYMBOL(s3c2410_gpio_getpin);
107 unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
110 unsigned long misccr;
112 local_irq_save(flags);
113 misccr = __raw_readl(S3C24XX_MISCCR);
116 __raw_writel(misccr, S3C24XX_MISCCR);
117 local_irq_restore(flags);
122 EXPORT_SYMBOL(s3c2410_modify_misccr);
124 int s3c2410_gpio_getirq(unsigned int pin)
126 if (pin < S3C2410_GPF(0) || pin > S3C2410_GPG(15))
127 return -EINVAL; /* not valid interrupts */
129 if (pin < S3C2410_GPG(0) && pin > S3C2410_GPF(7))
130 return -EINVAL; /* not valid pin */
132 if (pin < S3C2410_GPF(4))
133 return (pin - S3C2410_GPF(0)) + IRQ_EINT0;
135 if (pin < S3C2410_GPG(0))
136 return (pin - S3C2410_GPF(4)) + IRQ_EINT4;
138 return (pin - S3C2410_GPG(0)) + IRQ_EINT8;
141 EXPORT_SYMBOL(s3c2410_gpio_getirq);