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| author | Peter Ma <pma@mediamatech.com> | 2008-06-01 22:59:24 -0700 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-06-20 10:40:42 +0200 |
| commit | 4688f9e34a87e825aed34d07c9ca7a273e6fc8ab (patch) | |
| tree | 2ae0f55e36374730a10d37a10dfe4ec6724b7992 | |
| parent | 914f58c5766860373a7d232e961cee5a4b54a55b (diff) | |
| download | u-boot-imx-4688f9e34a87e825aed34d07c9ca7a273e6fc8ab.zip u-boot-imx-4688f9e34a87e825aed34d07c9ca7a273e6fc8ab.tar.gz u-boot-imx-4688f9e34a87e825aed34d07c9ca7a273e6fc8ab.tar.bz2 | |
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.c | 56 | ||||
| -rw-r--r-- | include/asm-avr32/arch-at32ap700x/gpio.h | 8 |
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); |