1 files changed, 94 insertions, 0 deletions
diff --git a/cpu/at32ap/pio.c b/cpu/at32ap/pio.c
new file mode 100644
index 0000000..8b6c3a3
--- /dev/null
+++ b/cpu/at32ap/pio.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/platform.h>
+
+#include "pio2.h"
+
+struct pio_state {
+	const struct device *dev;
+	u32 alloc_mask;
+};
+
+static struct pio_state pio_state[CFG_NR_PIOS];
+
+int gpio_set_func(enum device_id gpio_devid, unsigned int start,
+		  unsigned int nr_pins, enum gpio_func func)
+{
+	const struct device *gpio;
+	struct pio_state *state;
+	u32 mask;
+
+	state = &pio_state[gpio_devid - DEVICE_PIOA];
+
+	gpio = get_device(gpio_devid);
+	if (!gpio)
+		return -EBUSY;
+
+	state->dev = gpio;
+	mask = ((1 << nr_pins) - 1) << start;
+
+	if (mask & state->alloc_mask) {
+		put_device(gpio);
+		return -EBUSY;
+	}
+	state->alloc_mask |= mask;
+
+	switch (func) {
+	case GPIO_FUNC_GPIO:
+		/* TODO */
+		return -EINVAL;
+	case GPIO_FUNC_A:
+		pio2_writel(gpio, ASR, mask);
+		pio2_writel(gpio, PDR, mask);
+		pio2_writel(gpio, PUDR, mask);
+		break;
+	case GPIO_FUNC_B:
+		pio2_writel(gpio, BSR, mask);
+		pio2_writel(gpio, PDR, mask);
+		pio2_writel(gpio, PUDR, mask);
+		break;
+	}
+
+	return 0;
+}
+
+void gpio_free(enum device_id gpio_devid, unsigned int start,
+	       unsigned int nr_pins)
+{
+	const struct device *gpio;
+	struct pio_state *state;
+	u32 mask;
+
+	state = &pio_state[gpio_devid - DEVICE_PIOA];
+	gpio = state->dev;
+	mask = ((1 << nr_pins) - 1) << start;
+
+	pio2_writel(gpio, ODR, mask);
+	pio2_writel(gpio, PER, mask);
+
+	state->alloc_mask &= ~mask;
+	put_device(gpio);
+}