[ARM] S3C24XX: Add gpiolib support
Add support for gpilib on all S3C24XX platforms. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
parent
ed9137f103
commit
f348a2a281
|
@ -9,6 +9,7 @@ config PLAT_S3C24XX
|
|||
depends on ARCH_S3C2410
|
||||
default y if ARCH_S3C2410
|
||||
select NO_IOPORT
|
||||
select HAVE_GPIO_LIB
|
||||
help
|
||||
Base platform code for any Samsung S3C24XX device
|
||||
|
||||
|
|
|
@ -16,6 +16,7 @@ obj-y += cpu.o
|
|||
obj-y += irq.o
|
||||
obj-y += devs.o
|
||||
obj-y += gpio.o
|
||||
obj-y += gpiolib.o
|
||||
obj-y += time.o
|
||||
obj-y += clock.o
|
||||
|
||||
|
|
|
@ -0,0 +1,259 @@
|
|||
/* linux/arch/arm/plat-s3c24xx/gpiolib.c
|
||||
*
|
||||
* Copyright (c) 2008 Simtec Electronics
|
||||
* http://armlinux.simtec.co.uk/
|
||||
* Ben Dooks <ben@simtec.co.uk>
|
||||
*
|
||||
* S3C24XX GPIOlib support
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/gpio.h>
|
||||
|
||||
#include <asm/hardware.h>
|
||||
#include <asm/irq.h>
|
||||
|
||||
#include <asm/arch/regs-gpio.h>
|
||||
|
||||
struct s3c24xx_gpio_chip {
|
||||
struct gpio_chip chip;
|
||||
void __iomem *base;
|
||||
};
|
||||
|
||||
static inline struct s3c24xx_gpio_chip *to_s3c_chip(struct gpio_chip *gpc)
|
||||
{
|
||||
return container_of(gpc, struct s3c24xx_gpio_chip, chip);
|
||||
}
|
||||
|
||||
/* these routines are exported for use by other parts of the platform
|
||||
* and system support, but are not intended to be used directly by the
|
||||
* drivers themsevles.
|
||||
*/
|
||||
|
||||
int s3c24xx_gpiolib_input(struct gpio_chip *chip, unsigned offset)
|
||||
{
|
||||
struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
|
||||
void __iomem *base = ourchip->base;
|
||||
unsigned long flags;
|
||||
unsigned long con;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
con = __raw_readl(base + 0x00);
|
||||
con &= ~(3 << (offset * 2));
|
||||
con |= (S3C2410_GPIO_OUTPUT & 0xf) << (offset * 2);
|
||||
|
||||
__raw_writel(con, base + 0x00);
|
||||
|
||||
local_irq_restore(flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int s3c24xx_gpiolib_output(struct gpio_chip *chip,
|
||||
unsigned offset, int value)
|
||||
{
|
||||
struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
|
||||
void __iomem *base = ourchip->base;
|
||||
unsigned long flags;
|
||||
unsigned long dat;
|
||||
unsigned long con;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
dat = __raw_readl(base + 0x04);
|
||||
dat &= ~(1 << offset);
|
||||
if (value)
|
||||
dat |= 1 << offset;
|
||||
__raw_writel(dat, base + 0x04);
|
||||
|
||||
con = __raw_readl(base + 0x00);
|
||||
con &= ~(3 << (offset * 2));
|
||||
con |= (S3C2410_GPIO_OUTPUT & 0xf) << (offset * 2);
|
||||
|
||||
__raw_writel(con, base + 0x00);
|
||||
__raw_writel(dat, base + 0x04);
|
||||
|
||||
local_irq_restore(flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void s3c24xx_gpiolib_set(struct gpio_chip *chip, unsigned offset, int value)
|
||||
{
|
||||
struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
|
||||
void __iomem *base = ourchip->base;
|
||||
unsigned long flags;
|
||||
unsigned long dat;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
dat = __raw_readl(base + 0x04);
|
||||
dat &= ~(1 << offset);
|
||||
if (value)
|
||||
dat |= 1 << offset;
|
||||
__raw_writel(dat, base + 0x04);
|
||||
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
int s3c24xx_gpiolib_get(struct gpio_chip *chip, unsigned offset)
|
||||
{
|
||||
struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
|
||||
unsigned long val;
|
||||
|
||||
val = __raw_readl(ourchip->base + 0x04);
|
||||
val >>= offset;
|
||||
val &= 1;
|
||||
|
||||
return val;
|
||||
}
|
||||
|
||||
static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
|
||||
unsigned offset, int value)
|
||||
{
|
||||
struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
|
||||
void __iomem *base = ourchip->base;
|
||||
unsigned long flags;
|
||||
unsigned long dat;
|
||||
unsigned long con;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
con = __raw_readl(base + 0x00);
|
||||
dat = __raw_readl(base + 0x04);
|
||||
|
||||
dat &= ~(1 << offset);
|
||||
if (value)
|
||||
dat |= 1 << offset;
|
||||
|
||||
__raw_writel(dat, base + 0x04);
|
||||
|
||||
con &= ~(1 << offset);
|
||||
|
||||
__raw_writel(con, base + 0x00);
|
||||
__raw_writel(dat, base + 0x04);
|
||||
|
||||
local_irq_restore(flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
struct s3c24xx_gpio_chip gpios[] = {
|
||||
[0] = {
|
||||
.base = S3C24XX_GPIO_BASE(S3C2410_GPA0),
|
||||
.chip = {
|
||||
.base = S3C2410_GPA0,
|
||||
.owner = THIS_MODULE,
|
||||
.label = "GPIOA",
|
||||
.ngpio = 24,
|
||||
.direction_input = s3c24xx_gpiolib_banka_input,
|
||||
.direction_output = s3c24xx_gpiolib_banka_output,
|
||||
.set = s3c24xx_gpiolib_set,
|
||||
.get = s3c24xx_gpiolib_get,
|
||||
},
|
||||
},
|
||||
[1] = {
|
||||
.base = S3C24XX_GPIO_BASE(S3C2410_GPB0),
|
||||
.chip = {
|
||||
.base = S3C2410_GPB0,
|
||||
.owner = THIS_MODULE,
|
||||
.label = "GPIOB",
|
||||
.ngpio = 16,
|
||||
.direction_input = s3c24xx_gpiolib_input,
|
||||
.direction_output = s3c24xx_gpiolib_output,
|
||||
.set = s3c24xx_gpiolib_set,
|
||||
.get = s3c24xx_gpiolib_get,
|
||||
},
|
||||
},
|
||||
[2] = {
|
||||
.base = S3C24XX_GPIO_BASE(S3C2410_GPC0),
|
||||
.chip = {
|
||||
.base = S3C2410_GPC0,
|
||||
.owner = THIS_MODULE,
|
||||
.label = "GPIOC",
|
||||
.ngpio = 16,
|
||||
.direction_input = s3c24xx_gpiolib_input,
|
||||
.direction_output = s3c24xx_gpiolib_output,
|
||||
.set = s3c24xx_gpiolib_set,
|
||||
.get = s3c24xx_gpiolib_get,
|
||||
},
|
||||
},
|
||||
[3] = {
|
||||
.base = S3C24XX_GPIO_BASE(S3C2410_GPD0),
|
||||
.chip = {
|
||||
.base = S3C2410_GPD0,
|
||||
.owner = THIS_MODULE,
|
||||
.label = "GPIOD",
|
||||
.ngpio = 16,
|
||||
.direction_input = s3c24xx_gpiolib_input,
|
||||
.direction_output = s3c24xx_gpiolib_output,
|
||||
.set = s3c24xx_gpiolib_set,
|
||||
.get = s3c24xx_gpiolib_get,
|
||||
},
|
||||
},
|
||||
[4] = {
|
||||
.base = S3C24XX_GPIO_BASE(S3C2410_GPE0),
|
||||
.chip = {
|
||||
.base = S3C2410_GPE0,
|
||||
.label = "GPIOE",
|
||||
.owner = THIS_MODULE,
|
||||
.ngpio = 16,
|
||||
.direction_input = s3c24xx_gpiolib_input,
|
||||
.direction_output = s3c24xx_gpiolib_output,
|
||||
.set = s3c24xx_gpiolib_set,
|
||||
.get = s3c24xx_gpiolib_get,
|
||||
},
|
||||
},
|
||||
[5] = {
|
||||
.base = S3C24XX_GPIO_BASE(S3C2410_GPF0),
|
||||
.chip = {
|
||||
.base = S3C2410_GPF0,
|
||||
.owner = THIS_MODULE,
|
||||
.label = "GPIOF",
|
||||
.ngpio = 8,
|
||||
.direction_input = s3c24xx_gpiolib_input,
|
||||
.direction_output = s3c24xx_gpiolib_output,
|
||||
.set = s3c24xx_gpiolib_set,
|
||||
.get = s3c24xx_gpiolib_get,
|
||||
},
|
||||
},
|
||||
[6] = {
|
||||
.base = S3C24XX_GPIO_BASE(S3C2410_GPG0),
|
||||
.chip = {
|
||||
.base = S3C2410_GPG0,
|
||||
.owner = THIS_MODULE,
|
||||
.label = "GPIOG",
|
||||
.ngpio = 10,
|
||||
.direction_input = s3c24xx_gpiolib_input,
|
||||
.direction_output = s3c24xx_gpiolib_output,
|
||||
.set = s3c24xx_gpiolib_set,
|
||||
.get = s3c24xx_gpiolib_get,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
static __init int s3c24xx_gpiolib_init(void)
|
||||
{
|
||||
struct s3c24xx_gpio_chip *chip = gpios;
|
||||
int gpn;
|
||||
|
||||
for (gpn = 0; gpn < ARRAY_SIZE(gpios); gpn++, chip++)
|
||||
gpiochip_add(&chip->chip);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
arch_initcall(s3c24xx_gpiolib_init);
|
|
@ -1,68 +1,18 @@
|
|||
/*
|
||||
* linux/include/asm-arm/arch-s3c2410/gpio.h
|
||||
/* linux/include/asm-arm/arch-s3c2410/gpio.h
|
||||
*
|
||||
* S3C2410 GPIO wrappers for arch-neutral GPIO calls
|
||||
* Copyright (c) 2008 Simtec Electronics
|
||||
* http://armlinux.simtec.co.uk/
|
||||
* Ben Dooks <ben@simtec.co.uk>
|
||||
*
|
||||
* Written by Philipp Zabel <philipp.zabel@gmail.com>
|
||||
* S3C2410 - GPIO lib support
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*
|
||||
*/
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef __ASM_ARCH_S3C2410_GPIO_H
|
||||
#define __ASM_ARCH_S3C2410_GPIO_H
|
||||
#define gpio_get_value __gpio_get_value
|
||||
#define gpio_set_value __gpio_set_value
|
||||
#define gpio_cansleep __gpio_cansleep
|
||||
|
||||
#include <asm/irq.h>
|
||||
#include <asm/hardware.h>
|
||||
#include <asm/arch/regs-gpio.h>
|
||||
|
||||
static inline int gpio_request(unsigned gpio, const char *label)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void gpio_free(unsigned gpio)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline int gpio_direction_input(unsigned gpio)
|
||||
{
|
||||
s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_INPUT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int gpio_direction_output(unsigned gpio, int value)
|
||||
{
|
||||
s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_OUTPUT);
|
||||
/* REVISIT can we write the value first, to avoid glitching? */
|
||||
s3c2410_gpio_setpin(gpio, value);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define gpio_get_value(gpio) s3c2410_gpio_getpin(gpio)
|
||||
#define gpio_set_value(gpio,value) s3c2410_gpio_setpin(gpio, value)
|
||||
|
||||
#include <asm-generic/gpio.h> /* cansleep wrappers */
|
||||
|
||||
#ifdef CONFIG_CPU_S3C2400
|
||||
#define gpio_to_irq(gpio) s3c2400_gpio_getirq(gpio)
|
||||
#else
|
||||
#define gpio_to_irq(gpio) s3c2410_gpio_getirq(gpio)
|
||||
#endif
|
||||
|
||||
/* FIXME implement irq_to_gpio() */
|
||||
|
||||
#endif
|
||||
#include <asm-generic/gpio.h>
|
||||
|
|
Loading…
Reference in New Issue