|  | /* | 
|  | * 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 |