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authorPeter Ma <pma@mediamatech.com>2008-06-01 22:59:24 -0700
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-06-20 10:40:42 +0200
commit4688f9e34a87e825aed34d07c9ca7a273e6fc8ab (patch)
tree2ae0f55e36374730a10d37a10dfe4ec6724b7992
parent914f58c5766860373a7d232e961cee5a4b54a55b (diff)
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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>
-rw-r--r--cpu/at32ap/pio.c56
-rw-r--r--include/asm-avr32/arch-at32ap700x/gpio.h8
2 files changed, 64 insertions, 0 deletions
diff --git a/cpu/at32ap/pio.c b/cpu/at32ap/pio.c
index 9ba0b8e..f64004b 100644
--- a/cpu/at32ap/pio.c
+++ b/cpu/at32ap/pio.c
@@ -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;
+}
diff --git a/include/asm-avr32/arch-at32ap700x/gpio.h b/include/asm-avr32/arch-at32ap700x/gpio.h
index ef20cea..8c922c7 100644
--- a/include/asm-avr32/arch-at32ap700x/gpio.h
+++ b/include/asm-avr32/arch-at32ap700x/gpio.h
@@ -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);