90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
|
|
* Coldfire generic GPIO support
|
|
*
|
|
* (C) Copyright 2009, Steven King <sfking@fdwdc.com>
|
|
*
|
|
* 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; version 2 of the License.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef coldfire_gpio_h
|
|
#define coldfire_gpio_h
|
|
|
|
#include <linux/io.h>
|
|
#include <asm/coldfire.h>
|
|
#include <asm/mcfsim.h>
|
|
#include <asm/mcfgpio.h>
|
|
/*
|
|
* The Generic GPIO functions
|
|
*
|
|
* If the gpio is a compile time constant and is one of the Coldfire gpios,
|
|
* use the inline version, otherwise dispatch thru gpiolib.
|
|
*/
|
|
|
|
static inline int gpio_get_value(unsigned gpio)
|
|
{
|
|
if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX)
|
|
return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio);
|
|
else
|
|
return __gpio_get_value(gpio);
|
|
}
|
|
|
|
static inline void gpio_set_value(unsigned gpio, int value)
|
|
{
|
|
if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) {
|
|
if (gpio < MCFGPIO_SCR_START) {
|
|
unsigned long flags;
|
|
MCFGPIO_PORTTYPE data;
|
|
|
|
local_irq_save(flags);
|
|
data = mcfgpio_read(__mcfgpio_podr(gpio));
|
|
if (value)
|
|
data |= mcfgpio_bit(gpio);
|
|
else
|
|
data &= ~mcfgpio_bit(gpio);
|
|
mcfgpio_write(data, __mcfgpio_podr(gpio));
|
|
local_irq_restore(flags);
|
|
} else {
|
|
if (value)
|
|
mcfgpio_write(mcfgpio_bit(gpio),
|
|
MCFGPIO_SETR_PORT(gpio));
|
|
else
|
|
mcfgpio_write(~mcfgpio_bit(gpio),
|
|
MCFGPIO_CLRR_PORT(gpio));
|
|
}
|
|
} else
|
|
__gpio_set_value(gpio, value);
|
|
}
|
|
|
|
static inline int gpio_to_irq(unsigned gpio)
|
|
{
|
|
#if defined(MCFGPIO_IRQ_MIN)
|
|
if ((gpio >= MCFGPIO_IRQ_MIN) && (gpio < MCFGPIO_IRQ_MAX))
|
|
#else
|
|
if (gpio < MCFGPIO_IRQ_MAX)
|
|
#endif
|
|
return gpio + MCFGPIO_IRQ_VECBASE;
|
|
else
|
|
return __gpio_to_irq(gpio);
|
|
}
|
|
|
|
static inline int irq_to_gpio(unsigned irq)
|
|
{
|
|
return (irq >= MCFGPIO_IRQ_VECBASE &&
|
|
irq < (MCFGPIO_IRQ_VECBASE + MCFGPIO_IRQ_MAX)) ?
|
|
irq - MCFGPIO_IRQ_VECBASE : -ENXIO;
|
|
}
|
|
|
|
static inline int gpio_cansleep(unsigned gpio)
|
|
{
|
|
return gpio < MCFGPIO_PIN_MAX ? 0 : __gpio_cansleep(gpio);
|
|
}
|
|
|
|
#endif
|