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avr32: Add GPIO manipulation functions 

Adds GPIO manipulation functions for AVR32 AP7 platform.

Signed-off-by: Peter Ma <pma@mediamatech.com>
[haavard.skinnemoen@atmel.com: coding style fixup, slight simplification]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
utp
Peter Ma 2008-06-01 22:59:24 -07:00 committed by Haavard Skinnemoen
parent 914f58c576
commit 4688f9e34a
2 changed files with 64 additions and 0 deletions
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56
cpu/at32ap/pio.c
View File

@ -58,3 +58,59 @@ void gpio_select_periph_B(unsigned int pin, int use_pullup)
else
pio2_writel(base, PUDR, mask);
}
void gpio_select_pio(unsigned int pin, unsigned long gpiof_flags)
{
void *base = gpio_pin_to_addr(pin);
uint32_t mask = 1 << (pin & 0x1f);
if (!base)
panic("Invalid GPIO pin %u\n", pin);
if (gpiof_flags & GPIOF_OUTPUT) {
if (gpiof_flags & GPIOF_MULTIDRV)
pio2_writel(base, MDER, mask);
else
pio2_writel(base, MDDR, mask);
pio2_writel(base, PUDR, mask);
pio2_writel(base, OER, mask);
} else {
if (gpiof_flags & GPIOF_PULLUP)
pio2_writel(base, PUER, mask);
else
pio2_writel(base, PUDR, mask);
if (gpiof_flags & GPIOF_DEGLITCH)
pio2_writel(base, IFER, mask);
else
pio2_writel(base, IFDR, mask);
pio2_writel(base, ODR, mask);
}
pio2_writel(base, PER, mask);
}
void gpio_set_value(unsigned int pin, int value)
{
void *base = gpio_pin_to_addr(pin);
uint32_t mask = 1 << (pin & 0x1f);
if (!base)
panic("Invalid GPIO pin %u\n", pin);
if (value)
pio2_writel(base, SODR, mask);
else
pio2_writel(base, CODR, mask);
}
int gpio_get_value(unsigned int pin)
{
void *base = gpio_pin_to_addr(pin);
int value;
if (!base)
panic("Invalid GPIO pin %u\n", pin);
value = pio2_readl(base, PDSR);
return (value >> (pin & 0x1f)) & 1;
}

8
include/asm-avr32/arch-at32ap700x/gpio.h
View File

@ -180,6 +180,11 @@
#define GPIO_PIN_PE25 (GPIO_PIOE_BASE + 25)
#define GPIO_PIN_PE26 (GPIO_PIOE_BASE + 26)
#define GPIOF_PULLUP 0x00000001 /* (not-OUT) Enable pull-up */
#define GPIOF_OUTPUT 0x00000002 /* (OUT) Enable output driver */
#define GPIOF_DEGLITCH 0x00000004 /* (IN) Filter glitches */
#define GPIOF_MULTIDRV 0x00000008 /* Enable multidriver option */
static inline void *gpio_pin_to_addr(unsigned int pin)
{
switch (pin >> 5) {
@ -200,6 +205,9 @@ static inline void *gpio_pin_to_addr(unsigned int pin)
void gpio_select_periph_A(unsigned int pin, int use_pullup);
void gpio_select_periph_B(unsigned int pin, int use_pullup);
void gpio_select_pio(unsigned int pin, unsigned long gpiof_flags);
void gpio_set_value(unsigned int pin, int value);
int gpio_get_value(unsigned int pin);
void gpio_enable_ebi(void);