mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-03 21:48:15 +00:00
819833af39
This helps to clean up the include/ directory so that it only contains non-architecture-specific headers and also matches Linux's directory layout which many U-Boot developers are already familiar with. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/*
|
|
* Copyright (C) 2008 Atmel Corporation
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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
|
|
*/
|
|
#ifndef __AVR32_PORTMUX_GPIO_H__
|
|
#define __AVR32_PORTMUX_GPIO_H__
|
|
|
|
#include <asm/io.h>
|
|
|
|
/* Register layout for this specific device */
|
|
#include <asm/arch/gpio-impl.h>
|
|
|
|
/* Register access macros */
|
|
#define gpio_readl(port, reg) \
|
|
__raw_readl(&((struct gpio_regs *)port)->reg)
|
|
#define gpio_writel(gpio, reg, value) \
|
|
__raw_writel(value, &((struct gpio_regs *)port)->reg)
|
|
|
|
/* Portmux API starts here. See doc/README.AVR32-port-muxing */
|
|
|
|
enum portmux_function {
|
|
PORTMUX_FUNC_A,
|
|
PORTMUX_FUNC_B,
|
|
PORTMUX_FUNC_C,
|
|
PORTMUX_FUNC_D,
|
|
};
|
|
|
|
#define PORTMUX_DIR_INPUT (0 << 0)
|
|
#define PORTMUX_DIR_OUTPUT (1 << 0)
|
|
#define PORTMUX_INIT_LOW (0 << 1)
|
|
#define PORTMUX_INIT_HIGH (1 << 1)
|
|
#define PORTMUX_PULL_UP (1 << 2)
|
|
#define PORTMUX_PULL_DOWN (2 << 2)
|
|
#define PORTMUX_BUSKEEPER (3 << 2)
|
|
#define PORTMUX_DRIVE_MIN (0 << 4)
|
|
#define PORTMUX_DRIVE_LOW (1 << 4)
|
|
#define PORTMUX_DRIVE_HIGH (2 << 4)
|
|
#define PORTMUX_DRIVE_MAX (3 << 4)
|
|
#define PORTMUX_OPEN_DRAIN (1 << 6)
|
|
|
|
void portmux_select_peripheral(void *port, unsigned long pin_mask,
|
|
enum portmux_function func, unsigned long flags);
|
|
void portmux_select_gpio(void *port, unsigned long pin_mask,
|
|
unsigned long flags);
|
|
|
|
/* Internal helper functions */
|
|
|
|
static inline void *gpio_pin_to_port(unsigned int pin)
|
|
{
|
|
return (void *)GPIO_BASE + (pin >> 5) * 0x200;
|
|
}
|
|
|
|
static inline void __gpio_set_output_value(void *port, unsigned int pin,
|
|
int value)
|
|
{
|
|
if (value)
|
|
gpio_writel(port, OVRS, 1 << pin);
|
|
else
|
|
gpio_writel(port, OVRC, 1 << pin);
|
|
}
|
|
|
|
static inline int __gpio_get_input_value(void *port, unsigned int pin)
|
|
{
|
|
return (gpio_readl(port, PVR) >> pin) & 1;
|
|
}
|
|
|
|
void gpio_set_output_value(unsigned int pin, int value);
|
|
int gpio_get_input_value(unsigned int pin);
|
|
|
|
/* GPIO API starts here */
|
|
|
|
/*
|
|
* GCC doesn't realize that the constant case is extremely trivial,
|
|
* so we need to help it make the right decision by using
|
|
* always_inline.
|
|
*/
|
|
__attribute__((always_inline))
|
|
static inline void gpio_set_value(unsigned int pin, int value)
|
|
{
|
|
if (__builtin_constant_p(pin))
|
|
__gpio_set_output_value(gpio_pin_to_port(pin),
|
|
pin & 0x1f, value);
|
|
else
|
|
gpio_set_output_value(pin, value);
|
|
}
|
|
|
|
__attribute__((always_inline))
|
|
static inline int gpio_get_value(unsigned int pin)
|
|
{
|
|
if (__builtin_constant_p(pin))
|
|
return __gpio_get_input_value(gpio_pin_to_port(pin),
|
|
pin & 0x1f);
|
|
else
|
|
return gpio_get_input_value(pin);
|
|
}
|
|
|
|
#endif /* __AVR32_PORTMUX_GPIO_H__ */
|