123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
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* Copyright (C) 2006, 2008 Atmel Corporation
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __AVR32_PORTMUX_PIO_H__
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#define __AVR32_PORTMUX_PIO_H__
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#include <asm/io.h>
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/* PIO register offsets */
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#define PIO_PER 0x0000
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#define PIO_PDR 0x0004
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#define PIO_PSR 0x0008
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#define PIO_OER 0x0010
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#define PIO_ODR 0x0014
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#define PIO_OSR 0x0018
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#define PIO_IFER 0x0020
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#define PIO_IFDR 0x0024
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#define PIO_ISFR 0x0028
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#define PIO_SODR 0x0030
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#define PIO_CODR 0x0034
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#define PIO_ODSR 0x0038
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#define PIO_PDSR 0x003c
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#define PIO_IER 0x0040
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#define PIO_IDR 0x0044
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#define PIO_IMR 0x0048
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#define PIO_ISR 0x004c
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#define PIO_MDER 0x0050
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#define PIO_MDDR 0x0054
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#define PIO_MDSR 0x0058
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#define PIO_PUDR 0x0060
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#define PIO_PUER 0x0064
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#define PIO_PUSR 0x0068
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#define PIO_ASR 0x0070
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#define PIO_BSR 0x0074
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#define PIO_ABSR 0x0078
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#define PIO_OWER 0x00a0
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#define PIO_OWDR 0x00a4
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#define PIO_OWSR 0x00a8
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/* Hardware register access */
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#define pio_readl(base, reg) \
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__raw_readl((void *)base + PIO_##reg)
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#define pio_writel(base, reg, value) \
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__raw_writel((value), (void *)base + PIO_##reg)
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/* Portmux API starts here. See doc/README.AVR32-port-muxing */
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enum portmux_function {
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PORTMUX_FUNC_A,
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PORTMUX_FUNC_B,
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};
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/* Pull-down, buskeeper and drive strength are not supported */
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#define PORTMUX_DIR_INPUT (0 << 0)
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#define PORTMUX_DIR_OUTPUT (1 << 0)
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#define PORTMUX_INIT_LOW (0 << 1)
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#define PORTMUX_INIT_HIGH (1 << 1)
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#define PORTMUX_PULL_UP (1 << 2)
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#define PORTMUX_PULL_DOWN (0)
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#define PORTMUX_BUSKEEPER PORTMUX_PULL_UP
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#define PORTMUX_DRIVE_MIN (0)
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#define PORTMUX_DRIVE_LOW (0)
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#define PORTMUX_DRIVE_HIGH (0)
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#define PORTMUX_DRIVE_MAX (0)
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#define PORTMUX_OPEN_DRAIN (1 << 3)
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void portmux_select_peripheral(void *port, unsigned long pin_mask,
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enum portmux_function func, unsigned long flags);
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void portmux_select_gpio(void *port, unsigned long pin_mask,
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unsigned long flags);
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/* Internal helper functions */
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static inline void __pio_set_output_value(void *port, unsigned int pin,
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int value)
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{
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/*
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* value will usually be constant, but it's pretty cheap
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* either way.
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*/
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if (value)
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pio_writel(port, SODR, 1 << pin);
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else
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pio_writel(port, CODR, 1 << pin);
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}
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static inline int __pio_get_input_value(void *port, unsigned int pin)
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{
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return (pio_readl(port, PDSR) >> pin) & 1;
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}
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void pio_set_output_value(unsigned int pin, int value);
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int pio_get_input_value(unsigned int pin);
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/* GPIO API starts here */
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/*
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* GCC doesn't realize that the constant case is extremely trivial,
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* so we need to help it make the right decision by using
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* always_inline.
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*/
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__attribute__((always_inline))
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static inline void gpio_set_value(unsigned int pin, int value)
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{
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if (__builtin_constant_p(pin))
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__pio_set_output_value(pio_pin_to_port(pin), pin & 0x1f, value);
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else
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pio_set_output_value(pin, value);
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}
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__attribute__((always_inline))
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static inline int gpio_get_value(unsigned int pin)
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{
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if (__builtin_constant_p(pin))
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return __pio_get_input_value(pio_pin_to_port(pin), pin & 0x1f);
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else
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return pio_get_input_value(pin);
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}
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#endif /* __AVR32_PORTMUX_PIO_H__ */
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