leandrof/u-boot
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

avr32: Add GPIO manipulation functions

Browse Source 
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>
This commit is contained in:
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
Download Patch File Download Diff File Expand all files Collapse all files

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;
}