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#ifndef _ATHEROS_GPIO_H_
#define _ATHEROS_GPIO_H_
#include "ar531x.h"
/* Common AR531X global variables */
/* extern u32 ar531x_gpio_intr_Mask; */
/* AR5312 exported routines */
#ifdef CONFIG_ATHEROS_AR5312
asmlinkage void ar5312_gpio_irq_dispatch(void);
#endif
/* AR5315 exported routines */
#ifdef CONFIG_ATHEROS_AR5315
asmlinkage void ar5315_gpio_irq_dispatch(void);
#endif
/*
* Wrappers for the generic GPIO layer
*/
/* Sets a gpio to input, or returns ENXIO for non-existent gpio */
static inline int gpio_direction_input(unsigned gpio) {
DO_AR5312( if (gpio > AR531X_NUM_GPIO) { \
return -ENXIO; \
} else { \
sysRegWrite(AR531X_GPIO_CR, \
sysRegRead(AR531X_GPIO_CR) | \
AR531X_GPIO_CR_I(gpio) ); \
return 0; \
} \
)
DO_AR5315( if (gpio > AR5315_NUM_GPIO) { \
return -ENXIO; \
} else { \
sysRegWrite(AR5315_GPIO_CR, \
( sysRegRead(AR5315_GPIO_CR) & \
~(AR5315_GPIO_CR_M(gpio)) ) | \
AR5315_GPIO_CR_I(gpio) ); \
return 0; \
} \
)
return -ENXIO;
}
/* Sets a gpio to output with value, or returns ENXIO for non-existent gpio */
static inline int gpio_direction_output(unsigned gpio, int value) {
DO_AR5312( if (gpio > AR531X_NUM_GPIO) { \
return -ENXIO; \
} else { \
sysRegWrite(AR531X_GPIO_DO, \
( (sysRegRead(AR531X_GPIO_DO) & \
~(1 << gpio) ) | \
((value!=0) << gpio)) ); \
sysRegWrite(AR531X_GPIO_CR, \
( sysRegRead(AR531X_GPIO_CR) & \
~(AR531X_GPIO_CR_M(gpio)) )); \
return 0; \
} \
)
DO_AR5315( if (gpio > AR5315_NUM_GPIO) { \
return -ENXIO; \
} else { \
sysRegWrite(AR5315_GPIO_DO, \
( (sysRegRead(AR5315_GPIO_DO) & \
~(1 << gpio)) | \
((value!=0) << gpio)) ); \
sysRegWrite(AR5315_GPIO_CR, \
sysRegRead(AR5315_GPIO_CR) | \
AR5315_GPIO_CR_O(gpio) ); \
return 0; \
} \
)
return -ENXIO;
}
/* Reads the gpio pin. Unchecked function */
static inline int gpio_get_value(unsigned gpio) {
DO_AR5312(return (sysRegRead(AR531X_GPIO_DI) & (1 << gpio));)
DO_AR5315(return (sysRegRead(AR5315_GPIO_DI) & (1 << gpio));)
return 0;
}
/* Writes to the gpio pin. Unchecked function */
static inline void gpio_set_value(unsigned gpio, int value) {
DO_AR5312( sysRegWrite(AR531X_GPIO_DO, \
( (sysRegRead(AR531X_GPIO_DO) & \
~(1 << gpio)) | \
((value!=0) << gpio)) ); \
)
DO_AR5315( sysRegWrite(AR5315_GPIO_DO, \
( (sysRegRead(AR5315_GPIO_DO) & \
~(1 << gpio)) | \
((value!=0) << gpio)) ); \
)
}
static inline int gpio_request(unsigned gpio, const char *label) {
return 0;
}
static inline void gpio_free(unsigned gpio) {
}
/* Returns IRQ to attach for gpio. Unchecked function */
static inline int gpio_to_irq(unsigned gpio) {
return AR531X_GPIO_IRQ(gpio);
}
/* Returns gpio for IRQ attached. Unchecked function */
static inline int irq_to_gpio(unsigned irq) {
return (irq - (AR531X_GPIO_IRQ(0)));
}
/* #include <asm-generic/gpio.h> */ /* cansleep wrappers */
/* platforms that don't directly support access to GPIOs through I2C, SPI,
* or other blocking infrastructure can use these wrappers.
*/
static inline int gpio_cansleep(unsigned gpio) {
return 0;
}
static inline int gpio_get_value_cansleep(unsigned gpio) {
might_sleep();
return gpio_get_value(gpio);
}
static inline void gpio_set_value_cansleep(unsigned gpio, int value) {
might_sleep();
gpio_set_value(gpio, value);
}
#endif
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