| /* |
| * 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__ */ |