1 files changed, 114 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/arch-common/portmux-gpio.h b/arch/avr32/include/asm/arch-common/portmux-gpio.h
new file mode 100644
index 0000000000..1306cbe5dc
--- /dev/null
+++ b/arch/avr32/include/asm/arch-common/portmux-gpio.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2008 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
+ */
+#ifndef __AVR32_PORTMUX_GPIO_H__
+#define __AVR32_PORTMUX_GPIO_H__
+
+#include <asm/io.h>
+
+/* Register layout for this specific device */
+#include <asm/arch/gpio-impl.h>
+
+/* Register access macros */
+#define gpio_readl(port, reg)						\
+	__raw_readl(&((struct gpio_regs *)port)->reg)
+#define gpio_writel(gpio, reg, value)					\
+	__raw_writel(value, &((struct gpio_regs *)port)->reg)
+
+/* Portmux API starts here. See doc/README.AVR32-port-muxing */
+
+enum portmux_function {
+	PORTMUX_FUNC_A,
+	PORTMUX_FUNC_B,
+	PORTMUX_FUNC_C,
+	PORTMUX_FUNC_D,
+};
+
+#define PORTMUX_DIR_INPUT	(0 << 0)
+#define PORTMUX_DIR_OUTPUT	(1 << 0)
+#define PORTMUX_INIT_LOW	(0 << 1)
+#define PORTMUX_INIT_HIGH	(1 << 1)
+#define PORTMUX_PULL_UP		(1 << 2)
+#define PORTMUX_PULL_DOWN	(2 << 2)
+#define PORTMUX_BUSKEEPER	(3 << 2)
+#define PORTMUX_DRIVE_MIN	(0 << 4)
+#define PORTMUX_DRIVE_LOW	(1 << 4)
+#define PORTMUX_DRIVE_HIGH	(2 << 4)
+#define PORTMUX_DRIVE_MAX	(3 << 4)
+#define PORTMUX_OPEN_DRAIN	(1 << 6)
+
+void portmux_select_peripheral(void *port, unsigned long pin_mask,
+		enum portmux_function func, unsigned long flags);
+void portmux_select_gpio(void *port, unsigned long pin_mask,
+		unsigned long flags);
+
+/* Internal helper functions */
+
+static inline void *gpio_pin_to_port(unsigned int pin)
+{
+	return (void *)GPIO_BASE + (pin >> 5) * 0x200;
+}
+
+static inline void __gpio_set_output_value(void *port, unsigned int pin,
+		int value)
+{
+	if (value)
+		gpio_writel(port, OVRS, 1 << pin);
+	else
+		gpio_writel(port, OVRC, 1 << pin);
+}
+
+static inline int __gpio_get_input_value(void *port, unsigned int pin)
+{
+	return (gpio_readl(port, PVR) >> pin) & 1;
+}
+
+void gpio_set_output_value(unsigned int pin, int value);
+int gpio_get_input_value(unsigned int pin);
+
+/* GPIO API starts here */
+
+/*
+ * GCC doesn't realize that the constant case is extremely trivial,
+ * so we need to help it make the right decision by using
+ * always_inline.
+ */
+__attribute__((always_inline))
+static inline void gpio_set_value(unsigned int pin, int value)
+{
+	if (__builtin_constant_p(pin))
+		__gpio_set_output_value(gpio_pin_to_port(pin),
+				pin & 0x1f, value);
+	else
+		gpio_set_output_value(pin, value);
+}
+
+__attribute__((always_inline))
+static inline int gpio_get_value(unsigned int pin)
+{
+	if (__builtin_constant_p(pin))
+		return __gpio_get_input_value(gpio_pin_to_port(pin),
+				pin & 0x1f);
+	else
+		return gpio_get_input_value(pin);
+}
+
+#endif /* __AVR32_PORTMUX_GPIO_H__ */