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2d552285cd
This patch adds the gpio.c and gpio.h files, which support access to GPIO Controller (non-legacy) configuration register through a function interface. It doesn't add interrupt support due to pinmux reasons. On Galileo Gen 2 we need to configure a pin as input/interrupt using pinmux and this can only be achieved through I2C. There's one pin exported by default as GPIO output and we used this one to test this driver. In the future, we plan to add an I2C driver and a pinmux configuration driver in order to solve this kind of problems.
62 lines
2.5 KiB
C
62 lines
2.5 KiB
C
/*
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* Copyright (C) 2015, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CPU_X86_DRIVERS_QUARKX1000_GPIO_H_
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#define CPU_X86_DRIVERS_QUARKX1000_GPIO_H_
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#include <stdint.h>
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#include "pci.h"
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#define QUARKX1000_GPIO_IN (0 << 0)
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#define QUARKX1000_GPIO_OUT (1 << 0)
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#define QUARKX1000_GPIO_INT (1 << 1)
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#define QUARKX1000_GPIO_ACTIVE_LOW (0 << 2)
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#define QUARKX1000_GPIO_ACTIVE_HIGH (1 << 2)
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#define QUARKX1000_GPIO_LEVEL (0 << 3)
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#define QUARKX1000_GPIO_EDGE (1 << 3)
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#define QUARKX1000_GPIO_DEBOUNCE (1 << 4)
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#define QUARKX1000_GPIO_CLOCK_SYNC (1 << 5)
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int quarkX1000_gpio_init(void);
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int quarkX1000_gpio_config(uint8_t pin, int flags);
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int quarkX1000_gpio_read(uint8_t pin, uint8_t *value);
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int quarkX1000_gpio_write(uint8_t pin, uint8_t value);
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int quarkX1000_gpio_config_port(int flags);
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int quarkX1000_gpio_read_port(uint8_t *value);
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int quarkX1000_gpio_write_port(uint8_t value);
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void quarkX1000_gpio_clock_enable(void);
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void quarkX1000_gpio_clock_disable(void);
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#endif /* CPU_X86_DRIVERS_QUARKX1000_GPIO_H_ */
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