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|
/*
* arch/arm/mach-ns9xxx/include/mach/gpio.h
*
* Copyright (C) 2007,2008 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.
*/
#ifndef __ASM_ARCH_GPIO_H
#define __ASM_ARCH_GPIO_H
#include <linux/spinlock.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <mach/hardware.h>
#include <mach/processor.h>
#include <mach/regs-io-ns921x.h>
#include <mach/regs-bbu.h>
/* Macros for configuring the GPIO-functions */
#if defined(CONFIG_PROCESSOR_NS9210) || defined(CONFIG_PROCESSOR_NS9215)
# define NS921X_GPIO_FUNC_0 (0x00)
# define NS921X_GPIO_FUNC_1 (0x01)
# define NS921X_GPIO_FUNC_2 (0x02)
# define NS921X_GPIO_FUNC_3 (0x03)
# define NS921X_GPIO_FUNC_4 (0x04)
# define NS921X_GPIO_FUNC_GPIO NS921X_GPIO_FUNC_3
# define NS921X_GPIO_INPUT (0x00)
# define NS921X_GPIO_OUTPUT (0x01)
# define NS921X_GPIO_INVERT (0x01)
# define NS921X_GPIO_DONT_INVERT (0x00)
# define NS921X_GPIO_ENABLE_PULLUP (0x00)
# define NS921X_GPIO_DISABLE_PULLUP (0x01)
#endif
/* Macros for configuring the GPIO-functions */
#if defined(CONFIG_PROCESSOR_NS9360)
# define NS9360_GPIO_FUNC_0 (0x00)
# define NS9360_GPIO_FUNC_1 (0x01)
# define NS9360_GPIO_FUNC_2 (0x02)
# define NS9360_GPIO_FUNC_3 (0x03)
# define NS9360_GPIO_FUNC_4 (0x04)
# define NS9360_GPIO_FUNC_GPIO NS9360_GPIO_FUNC_3
# define NS9360_GPIO_INPUT (0x00)
# define NS9360_GPIO_OUTPUT (0x01)
# define NS9360_GPIO_INVERT (0x01)
# define NS9360_GPIO_DONT_INVERT (0x00)
#endif
struct gpio_to_irq_map {
unsigned gpio;
unsigned irq;
int func;
};
#define NS9XXX_NUM_GPIO 0
#if defined(CONFIG_PROCESSOR_NS9210)
# define NS9XXX_NUM_GPIO_NS9210 108
# if NS9XXX_NUM_GPIO < NS9XXX_NUM_GPIO_NS9210
# undef NS9XXX_NUM_GPIO
# define NS9XXX_NUM_GPIO NS9XXX_NUM_GPIO_NS9210
# endif
static inline int gpio_issocgpio_ns9210(unsigned gpio)
{
return gpio < NS9XXX_NUM_GPIO_NS9210 && !(gpio >= 50 && gpio < 105);
}
#endif
#if defined(CONFIG_PROCESSOR_NS9215)
# define NS9XXX_NUM_GPIO_NS9215 108
# if NS9XXX_NUM_GPIO < NS9XXX_NUM_GPIO_NS9215
# undef NS9XXX_NUM_GPIO
# define NS9XXX_NUM_GPIO NS9XXX_NUM_GPIO_NS9215
# endif
static inline int gpio_issocgpio_ns9215(unsigned gpio)
{
return gpio < NS9XXX_NUM_GPIO_NS9215;
}
#endif
static const inline struct gpio_to_irq_map *gpio_get_map(unsigned gpio,
const struct gpio_to_irq_map map[], size_t array_size)
{
/* TODO: check if a binary search yields some performance advantage */
int i;
for (i = 0; i < array_size; ++i) {
if (map[i].gpio == gpio)
return &map[i];
}
return NULL;
}
#if defined(CONFIG_PROCESSOR_NS921X)
const struct gpio_to_irq_map *gpio_get_map_ns921x(unsigned gpio) __attribute__((const));
static inline void gpio_configure_ns921x_unlocked(unsigned gpio,
int dir, int inv, int func, int dispullup)
{
void __iomem *conf = NS921X_IO_GPIOCONFx(gpio / 4);
u32 confval;
confval = __raw_readl(conf);
REGSETIM_IDX(confval, NS921X_IO_GPIOCONFx, DIR, gpio & 3, dir);
REGSETIM_IDX(confval, NS921X_IO_GPIOCONFx, INV, gpio & 3, inv);
REGSETIM_IDX(confval, NS921X_IO_GPIOCONFx, FUNC, gpio & 3, func);
if (gpio != 9 && gpio != 12 && (gpio < 102 || gpio > 105))
REGSETIM_IDX(confval, NS921X_IO_GPIOCONFx, PUEN, gpio & 3, dispullup);
else {
if (dispullup)
pr_warning("cannot disable pullup for gpio %u\n", gpio);
REGSETIM_IDX(confval, NS921X_IO_GPIOCONFx, PUEN, gpio & 3, 0);
}
__raw_writel(confval, conf);
}
static inline void gpio_configure_ns921x(unsigned gpio,
int dir, int inv, int func, int dispullup)
{
unsigned long flags;
local_irq_save(flags);
gpio_configure_ns921x_unlocked(gpio, dir, inv, func, dispullup);
local_irq_restore(flags);
}
static inline int gpio_get_value_ns921x(unsigned gpio)
{
void __iomem *stat = NS921X_IO_GPIOSTATx(gpio / 32);
return (__raw_readl(stat) >> (gpio & 31)) & 1;
}
static inline void gpio_set_value_ns921x_unlocked(unsigned gpio, int value)
{
void __iomem *ctrl = NS921X_IO_GPIOCTRLx(gpio / 32);
u32 ctrlval;
ctrlval = __raw_readl(ctrl);
if (value)
ctrlval |= 1 << (gpio & 31);
else
ctrlval &= ~(1 << (gpio & 31));
__raw_writel(ctrlval, ctrl);
}
static inline int gpio_direction_input_ns921x_unlocked(unsigned gpio)
{
gpio_configure_ns921x_unlocked(gpio, 0, 0, 3, 0);
return 0;
}
static inline int gpio_direction_irqinput_ns921x_unlocked(unsigned gpio)
{
const struct gpio_to_irq_map *map = gpio_get_map_ns921x(gpio);
if (map) {
gpio_configure_ns921x_unlocked(gpio, 0, 0, map->func, 0);
return 0;
} else
return gpio_direction_input_ns921x_unlocked(gpio);
}
static inline int gpio_direction_output_ns921x_unlocked(unsigned gpio,
int value)
{
gpio_set_value_ns921x_unlocked(gpio, value);
gpio_configure_ns921x_unlocked(gpio, 1, 0, 3, 0);
return 0;
}
#endif /* if defined(CONFIG_PROCESSOR_NS921X) */
#if defined(CONFIG_PROCESSOR_NS9360)
# define NS9XXX_NUM_GPIO_NS9360 73
# if NS9XXX_NUM_GPIO < NS9XXX_NUM_GPIO_NS9360
# undef NS9XXX_NUM_GPIO
# define NS9XXX_NUM_GPIO NS9XXX_NUM_GPIO_NS9360
# endif
static inline void __iomem *gpio_ns9360_gstataddr(unsigned gpio)
{
if (gpio < 32)
return NS9360_BBU_GSTAT1;
else if (gpio < 64)
return NS9360_BBU_GSTAT2;
else
return NS9360_BBU_GSTAT3;
}
static inline void __iomem *gpio_ns9360_gctrladdr(unsigned gpio)
{
if (gpio < 32)
return NS9360_BBU_GCTRL1;
else if (gpio < 64)
return NS9360_BBU_GCTRL2;
else
return NS9360_BBU_GCTRL3;
}
static inline void __iomem *gpio_ns9360_gconfaddr(unsigned gpio)
{
if (gpio < 56)
return NS9360_BBU_GCONFb1(gpio / 8);
else
/* this could be optimised away on
* ns9750 only builds, but it isn't ...
*/
return NS9360_BBU_GCONFb2((gpio - 56) / 8);
}
static inline int gpio_issocgpio_ns9360(unsigned gpio)
{
return gpio <= 72;
}
const struct gpio_to_irq_map *gpio_get_map_ns9360(unsigned gpio) __attribute__((const));
static inline void gpio_configure_ns9360_unlocked(unsigned gpio,
int dir, int inv, int func)
{
void __iomem *conf = gpio_ns9360_gconfaddr(gpio);
u32 confval;
confval = __raw_readl(conf);
REGSETIM_IDX(confval, NS9360_BBU_GCONFx, DIR, gpio & 7, dir);
REGSETIM_IDX(confval, NS9360_BBU_GCONFx, INV, gpio & 7, inv);
REGSETIM_IDX(confval, NS9360_BBU_GCONFx, FUNC, gpio & 7, func);
__raw_writel(confval, conf);
}
static inline void gpio_configure_ns9360(unsigned gpio,
int dir, int inv, int func)
{
unsigned long flags;
local_irq_save(flags);
gpio_configure_ns9360_unlocked(gpio, dir, inv, func);
local_irq_restore(flags);
}
static inline int gpio_get_value_ns9360(unsigned gpio)
{
void __iomem *stat = gpio_ns9360_gstataddr(gpio);
return (__raw_readl(stat) >> (gpio & 31)) & 1;
}
static inline void gpio_set_value_ns9360_unlocked(unsigned gpio, int value)
{
void __iomem *ctrl = gpio_ns9360_gctrladdr(gpio);
u32 ctrlval;
ctrlval = __raw_readl(ctrl);
if (value)
ctrlval |= 1 << (gpio & 31);
else
ctrlval &= ~(1 << (gpio & 31));
__raw_writel(ctrlval, ctrl);
}
static inline int gpio_direction_input_ns9360_unlocked(unsigned gpio)
{
gpio_configure_ns9360_unlocked(gpio, 0, 0, 3);
return 0;
}
static inline int gpio_direction_irqinput_ns9360_unlocked(unsigned gpio)
{
const struct gpio_to_irq_map *map = gpio_get_map_ns9360(gpio);
if (map) {
gpio_configure_ns9360_unlocked(gpio, 0, 0, map->func);
return 0;
} else
return gpio_direction_input_ns9360_unlocked(gpio);
}
static inline int gpio_direction_output_ns9360_unlocked(unsigned gpio,
int value)
{
gpio_set_value_ns9360_unlocked(gpio, value);
gpio_configure_ns9360_unlocked(gpio, 1, 0, 3);
return 0;
}
#endif /* if defined(CONFIG_PROCESSOR_NS9360) */
static inline int gpio_issocgpio(unsigned gpio)
{
#if defined(CONFIG_PROCESSOR_NS9210)
if (processor_is_ns9210())
return gpio_issocgpio_ns9210(gpio);
else
#endif
#if defined(CONFIG_PROCESSOR_NS9215)
if (processor_is_ns9215())
return gpio_issocgpio_ns9215(gpio);
else
#endif
#if defined(CONFIG_PROCESSOR_NS9360)
if (processor_is_ns9360())
return gpio_issocgpio_ns9360(gpio);
else
#endif
BUG();
BUG();
return 0;
}
#if defined(CONFIG_GPIOLIB)
#include <asm-generic/gpio.h>
static inline int gpio_get_value(unsigned gpio)
{
return __gpio_get_value(gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
return __gpio_set_value(gpio, value);
}
static inline int gpio_cansleep(unsigned gpio)
{
return __gpio_cansleep(gpio);
}
#else /* if defined(CONFIG_GPIOLIB) */
extern spinlock_t gpio_lock;
int gpio_request(unsigned gpio, const char *label);
void gpio_free(unsigned gpio);
static inline int gpio_get_value(unsigned gpio)
{
#if defined(CONFIG_PROCESSOR_NS921X)
if (processor_is_ns921x())
return gpio_get_value_ns921x(gpio);
else
#endif
#if defined(CONFIG_PROCESSOR_NS9360)
if (processor_is_ns9360())
return gpio_get_value_ns9360(gpio);
else
#endif
BUG();
}
static inline void gpio_set_value_unlocked(unsigned gpio, int value)
{
#if defined(CONFIG_PROCESSOR_NS921X)
if (processor_is_ns921x())
gpio_set_value_ns921x_unlocked(gpio, value);
else
#endif
#if defined(CONFIG_PROCESSOR_NS9360)
if (processor_is_ns9360())
gpio_set_value_ns9360_unlocked(gpio, value);
else
#endif
BUG();
}
static inline void gpio_set_value(unsigned gpio, int value)
{
unsigned long flags;
BUG_ON(!gpio_issocgpio(gpio));
spin_lock_irqsave(&gpio_lock, flags);
gpio_set_value_unlocked(gpio, value);
spin_unlock_irqrestore(&gpio_lock, flags);
}
static inline int gpio_direction_input(unsigned gpio)
{
if (likely(gpio_issocgpio(gpio))) {
int ret = -EINVAL;
unsigned long flags;
spin_lock_irqsave(&gpio_lock, flags);
#if defined(CONFIG_PROCESSOR_NS921X)
if (processor_is_ns921x())
ret = gpio_direction_irqinput_ns921x_unlocked(gpio);
else
#endif
#if defined(CONFIG_PROCESSOR_NS9360)
if (processor_is_ns9360())
ret = gpio_direction_irqinput_ns9360_unlocked(gpio);
else
#endif
BUG();
spin_unlock_irqrestore(&gpio_lock, flags);
return ret;
} else
return -EINVAL;
}
static inline int gpio_direction_output(unsigned gpio, int value)
{
if (likely(gpio_issocgpio(gpio))) {
int ret = -EINVAL;
unsigned long flags;
spin_lock_irqsave(&gpio_lock, flags);
#if defined(CONFIG_PROCESSOR_NS921X)
if (processor_is_ns921x())
ret = gpio_direction_output_ns921x_unlocked(gpio,
value);
else
#endif
#if defined(CONFIG_PROCESSOR_NS9360)
if (processor_is_ns9360())
ret = gpio_direction_output_ns9360_unlocked(gpio,
value);
else
#endif
BUG();
spin_unlock_irqrestore(&gpio_lock, flags);
return ret;
} else
return -EINVAL;
}
#include <asm-generic/gpio.h>
#endif /* if defined(CONFIG_GPIOLIB) / else */
/*
* ns9xxx can use gpio pins to trigger an irq, but it's not generic
* enough to be supported by the gpio_to_irq/irq_to_gpio interface
*/
static inline int gpio_to_irq(unsigned gpio)
{
#if defined(CONFIG_PROCESSOR_NS921X)
if (processor_is_ns921x()) {
const struct gpio_to_irq_map *map = gpio_get_map_ns921x(gpio);
if (map)
return map->irq;
}
#endif
#if defined(CONFIG_PROCESSOR_NS9360)
if (processor_is_ns9360()) {
const struct gpio_to_irq_map *map = gpio_get_map_ns9360(gpio);
if (map)
return map->irq;
}
#endif
return -EINVAL;
}
static inline int irq_to_gpio(unsigned irq)
{
return -EINVAL;
}
#endif /* ifndef __ASM_ARCH_GPIO_H */
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