avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/arch/avr32/include/asm/arch-common/portmux-pio.h

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2006, 2008 Atmel Corporation
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#ifndef __AVR32_PORTMUX_PIO_H__
+#define __AVR32_PORTMUX_PIO_H__
+
+#include <asm/io.h>
+
+/* PIO register offsets */
+#define PIO_PER			0x0000
+#define PIO_PDR			0x0004
+#define PIO_PSR			0x0008
+#define PIO_OER			0x0010
+#define PIO_ODR			0x0014
+#define PIO_OSR			0x0018
+#define PIO_IFER		0x0020
+#define PIO_IFDR		0x0024
+#define PIO_ISFR		0x0028
+#define PIO_SODR		0x0030
+#define PIO_CODR		0x0034
+#define PIO_ODSR		0x0038
+#define PIO_PDSR		0x003c
+#define PIO_IER			0x0040
+#define PIO_IDR			0x0044
+#define PIO_IMR			0x0048
+#define PIO_ISR			0x004c
+#define PIO_MDER		0x0050
+#define PIO_MDDR		0x0054
+#define PIO_MDSR		0x0058
+#define PIO_PUDR		0x0060
+#define PIO_PUER		0x0064
+#define PIO_PUSR		0x0068
+#define PIO_ASR			0x0070
+#define PIO_BSR			0x0074
+#define PIO_ABSR		0x0078
+#define PIO_OWER		0x00a0
+#define PIO_OWDR		0x00a4
+#define PIO_OWSR		0x00a8
+
+/* Hardware register access */
+#define pio_readl(base, reg)				\
+	__raw_readl((void *)base + PIO_##reg)
+#define pio_writel(base, reg, value)			\
+	__raw_writel((value), (void *)base + PIO_##reg)
+
+/* Portmux API starts here. See doc/README.AVR32-port-muxing */
+
+enum portmux_function {
+	PORTMUX_FUNC_A,
+	PORTMUX_FUNC_B,
+};
+
+/* Pull-down, buskeeper and drive strength are not supported */
+#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	(0)
+#define PORTMUX_BUSKEEPER	PORTMUX_PULL_UP
+#define PORTMUX_DRIVE_MIN	(0)
+#define PORTMUX_DRIVE_LOW	(0)
+#define PORTMUX_DRIVE_HIGH	(0)
+#define PORTMUX_DRIVE_MAX	(0)
+#define PORTMUX_OPEN_DRAIN	(1 << 3)
+
+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 __pio_set_output_value(void *port, unsigned int pin,
+		int value)
+{
+	/*
+	 * value will usually be constant, but it's pretty cheap
+	 * either way.
+	 */
+	if (value)
+		pio_writel(port, SODR, 1 << pin);
+	else
+		pio_writel(port, CODR, 1 << pin);
+}
+
+static inline int __pio_get_input_value(void *port, unsigned int pin)
+{
+	return (pio_readl(port, PDSR) >> pin) & 1;
+}
+
+void pio_set_output_value(unsigned int pin, int value);
+int pio_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))
+		__pio_set_output_value(pio_pin_to_port(pin), pin & 0x1f, value);
+	else
+		pio_set_output_value(pin, value);
+}
+
+__attribute__((always_inline))
+static inline int gpio_get_value(unsigned int pin)
+{
+	if (__builtin_constant_p(pin))
+		return __pio_get_input_value(pio_pin_to_port(pin), pin & 0x1f);
+	else
+		return pio_get_input_value(pin);
+}
+
+#endif /* __AVR32_PORTMUX_PIO_H__ */