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/*
* Copyright (C) 2006, 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_PIO_H__
#define __AVR32_PORTMUX_PIO_H__
#include <asm/io.h>
/* PIO register offsets */
#define PIO_PER 0x0000
#define PIO_PDR 0x0004
#define PIO_PSR 0x0008
#define PIO_OER 0x0010
#define PIO_ODR 0x0014
#define PIO_OSR 0x0018
#define PIO_IFER 0x0020
#define PIO_IFDR 0x0024
#define PIO_ISFR 0x0028
#define PIO_SODR 0x0030
#define PIO_CODR 0x0034
#define PIO_ODSR 0x0038
#define PIO_PDSR 0x003c
#define PIO_IER 0x0040
#define PIO_IDR 0x0044
#define PIO_IMR 0x0048
#define PIO_ISR 0x004c
#define PIO_MDER 0x0050
#define PIO_MDDR 0x0054
#define PIO_MDSR 0x0058
#define PIO_PUDR 0x0060
#define PIO_PUER 0x0064
#define PIO_PUSR 0x0068
#define PIO_ASR 0x0070
#define PIO_BSR 0x0074
#define PIO_ABSR 0x0078
#define PIO_OWER 0x00a0
#define PIO_OWDR 0x00a4
#define PIO_OWSR 0x00a8
/* Hardware register access */
#define pio_readl(base, reg) \
__raw_readl((void *)base + PIO_##reg)
#define pio_writel(base, reg, value) \
__raw_writel((value), (void *)base + PIO_##reg)
/* Portmux API starts here. See doc/README.AVR32-port-muxing */
enum portmux_function {
PORTMUX_FUNC_A,
PORTMUX_FUNC_B,
};
/* Pull-down, buskeeper and drive strength are not supported */
#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 (0)
#define PORTMUX_BUSKEEPER PORTMUX_PULL_UP
#define PORTMUX_DRIVE_MIN (0)
#define PORTMUX_DRIVE_LOW (0)
#define PORTMUX_DRIVE_HIGH (0)
#define PORTMUX_DRIVE_MAX (0)
#define PORTMUX_OPEN_DRAIN (1 << 3)
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 __pio_set_output_value(void *port, unsigned int pin,
int value)
{
/*
* value will usually be constant, but it's pretty cheap
* either way.
*/
if (value)
pio_writel(port, SODR, 1 << pin);
else
pio_writel(port, CODR, 1 << pin);
}
static inline int __pio_get_input_value(void *port, unsigned int pin)
{
return (pio_readl(port, PDSR) >> pin) & 1;
}
void pio_set_output_value(unsigned int pin, int value);
int pio_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))
__pio_set_output_value(pio_pin_to_port(pin), pin & 0x1f, value);
else
pio_set_output_value(pin, value);
}
__attribute__((always_inline))
static inline int gpio_get_value(unsigned int pin)
{
if (__builtin_constant_p(pin))
return __pio_get_input_value(pio_pin_to_port(pin), pin & 0x1f);
else
return pio_get_input_value(pin);
}
#endif /* __AVR32_PORTMUX_PIO_H__ */
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