mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 23:25:54 +00:00
724ce5ee15
The hardware team changed some things that were taken as being common to all ns9xxx processors up to now. This patch addresses: - irqs: s/IRQ_/IRQ_NS9360_/ - system module registers: some registers are still general, their definition lives now in include/asm-arm/arch-ns9xxx/regs-sys-common.h. The ns9360 specific ones are in .../regs-sys-ns9360.h As a result ns9360_systemclock cannot be static inline any more as its definition needs regs-sys-ns9360.h. This becomes a real problem when adding support for ns9215 as this will need regs-sys-ns9215.h and including both files will not work. For the same reason ns9360_reset() is now non-inline and gpio functions live in their own file. - register mapping: s/ns9xxx_map_io/ns9360_map_io/ - timer registers: move time.c to time-ns9360.c; s/ns9xxx_timer/ns9360_timer/ Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
146 lines
2.9 KiB
C
146 lines
2.9 KiB
C
/*
|
|
* arch/arm/mach-ns9xxx/gpio.c
|
|
*
|
|
* Copyright (C) 2006,2007 by Digi International Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*/
|
|
#include <linux/compiler.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/arch-ns9xxx/gpio.h>
|
|
#include <asm/arch-ns9xxx/processor.h>
|
|
#include <asm/arch-ns9xxx/processor-ns9360.h>
|
|
#include <asm/bug.h>
|
|
#include <asm/types.h>
|
|
#include <asm/bitops.h>
|
|
|
|
#include "gpio-ns9360.h"
|
|
|
|
#if defined(CONFIG_PROCESSOR_NS9360)
|
|
#define GPIO_MAX 72
|
|
#elif defined(CONFIG_PROCESSOR_NS9750)
|
|
#define GPIO_MAX 49
|
|
#endif
|
|
|
|
/* protects BBU_GCONFx and BBU_GCTRLx */
|
|
static spinlock_t gpio_lock = __SPIN_LOCK_UNLOCKED(gpio_lock);
|
|
|
|
/* only access gpiores with atomic ops */
|
|
static DECLARE_BITMAP(gpiores, GPIO_MAX + 1);
|
|
|
|
static inline int ns9xxx_valid_gpio(unsigned gpio)
|
|
{
|
|
#if defined(CONFIG_PROCESSOR_NS9360)
|
|
if (processor_is_ns9360())
|
|
return gpio <= 72;
|
|
else
|
|
#endif
|
|
#if defined(CONFIG_PROCESSOR_NS9750)
|
|
if (processor_is_ns9750())
|
|
return gpio <= 49;
|
|
else
|
|
#endif
|
|
{
|
|
BUG();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int gpio_request(unsigned gpio, const char *label)
|
|
{
|
|
if (likely(ns9xxx_valid_gpio(gpio)))
|
|
return test_and_set_bit(gpio, gpiores) ? -EBUSY : 0;
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL(gpio_request);
|
|
|
|
void gpio_free(unsigned gpio)
|
|
{
|
|
clear_bit(gpio, gpiores);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(gpio_free);
|
|
|
|
int gpio_direction_input(unsigned gpio)
|
|
{
|
|
if (likely(ns9xxx_valid_gpio(gpio))) {
|
|
int ret = -EINVAL;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&gpio_lock, flags);
|
|
#if defined(CONFIG_PROCESSOR_NS9360)
|
|
if (processor_is_ns9360())
|
|
ret = __ns9360_gpio_configure(gpio, 0, 0, 3);
|
|
else
|
|
#endif
|
|
BUG();
|
|
|
|
spin_unlock_irqrestore(&gpio_lock, flags);
|
|
|
|
return ret;
|
|
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_input);
|
|
|
|
int gpio_direction_output(unsigned gpio, int value)
|
|
{
|
|
if (likely(ns9xxx_valid_gpio(gpio))) {
|
|
int ret = -EINVAL;
|
|
unsigned long flags;
|
|
|
|
gpio_set_value(gpio, value);
|
|
|
|
spin_lock_irqsave(&gpio_lock, flags);
|
|
#if defined(CONFIG_PROCESSOR_NS9360)
|
|
if (processor_is_ns9360())
|
|
ret = __ns9360_gpio_configure(gpio, 1, 0, 3);
|
|
else
|
|
#endif
|
|
BUG();
|
|
|
|
spin_unlock_irqrestore(&gpio_lock, flags);
|
|
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_output);
|
|
|
|
int gpio_get_value(unsigned gpio)
|
|
{
|
|
#if defined(CONFIG_PROCESSOR_NS9360)
|
|
if (processor_is_ns9360())
|
|
return ns9360_gpio_get_value(gpio);
|
|
else
|
|
#endif
|
|
{
|
|
BUG();
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(gpio_get_value);
|
|
|
|
void gpio_set_value(unsigned gpio, int value)
|
|
{
|
|
unsigned long flags;
|
|
spin_lock_irqsave(&gpio_lock, flags);
|
|
#if defined(CONFIG_PROCESSOR_NS9360)
|
|
if (processor_is_ns9360())
|
|
ns9360_gpio_set_value(gpio, value);
|
|
else
|
|
#endif
|
|
BUG();
|
|
|
|
spin_unlock_irqrestore(&gpio_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_set_value);
|