Merge remote branch 'libmc1322x/master'

cpu/mc1322x/lib/gpio-util.c

@@ -0,0 +1,63 @@
+
+#include <mc1322x.h>
+#include <board.h>
+
+#include "gpio-util.h"
+
+void gpio_select_function(uint8_t gpio, uint8_t func) {
+	uint32_t mask = 3;
+	uint8_t major, minor, shift;
+	volatile uint32_t *base = GPIO_FUNC_SEL0;
+	uint32_t value;
+	major = gpio >> 4;
+	minor = gpio & 0xF;
+	shift = 2 * minor;
+
+	value = base[major];
+	value &= ~(mask << shift);
+	value |= (func << shift);
+	base[major] = value;
+}
+
+void gpio_reg_set(volatile uint32_t* reg, uint8_t bit) {
+	uint8_t major, minor;
+	major = bit / 32;
+	minor = bit % 32;
+	*(reg + major) |= (1UL << minor);
+}
+
+void gpio_reg_clear(volatile uint32_t* reg, uint8_t bit) {
+	uint8_t major, minor;
+	major = bit / 32;
+	minor = bit % 32;
+	*(reg + major) &= ~(1UL << minor);
+}
+
+void gpio_set_pad_dir(uint8_t gpio, uint8_t dir) {
+	uint8_t major, minor;
+	major = gpio / 32;
+	minor = gpio % 32;
+	if (dir) gpio_reg_set(GPIO_PAD_DIR0 + major, minor);
+	else     gpio_reg_clear(GPIO_PAD_DIR0 + major, minor);
+}
+
+void gpio_set(uint8_t gpio) {
+	uint8_t major, minor;
+	major = gpio / 32;
+	minor = gpio % 32;
+	*(GPIO_DATA_SET0 + major) = (1UL << minor);
+}
+
+void gpio_reset(uint8_t gpio) {
+	uint8_t major, minor;
+	major = gpio / 32;
+	minor = gpio % 32;
+	*(GPIO_DATA_RESET0 + major) = (1UL << minor);
+}
+
+bool gpio_read(uint8_t gpio) {
+	uint8_t major, minor;
+	major = gpio / 32;
+	minor = gpio % 32;
+	return (*(GPIO_DATA0 + major) >> minor) & 1;
+}