90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* $NetBSD: mcp23xxxgpiovar.h,v 1.2 2022/01/17 19:36:54 thorpej Exp $ */
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/*-
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* Copyright (c) 2014, 2022 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Frank Kardel, and by Jason R. Thorpe.
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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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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, 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 OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_IC_MCP23xxxGPIOVAR_H_
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#define _DEV_IC_MCP23xxxGPIOVAR_H_
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/*
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* Driver for Microchip serial I/O expansers:
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*
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* MCP23008 8-bit, I2C interface
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* MCP23S08 8-bit, SPI interface
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* MCP23017 16-bit, I2C interface
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* MCP23S17 16-bit, SPI interface
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* MCP23018 16-bit (open-drain outputs), I2C interface
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* MCP23S18 16-bit (open-drain outputs), SPI interface
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*
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* Data sheet:
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*
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* https://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf
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*/
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#include <sys/gpio.h>
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#include <dev/gpio/gpiovar.h>
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struct mcpgpio_softc;
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typedef enum {
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MCPGPIO_TYPE_23x08 = 0,
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MCPGPIO_TYPE_23x17 = 1,
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MCPGPIO_TYPE_23x18 = 2,
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} mcpgpio_type;
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struct mcpgpio_variant {
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const char *name;
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mcpgpio_type type;
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};
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struct mcpgpio_accessops {
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int (*lock)(struct mcpgpio_softc *);
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void (*unlock)(struct mcpgpio_softc *);
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int (*read)(struct mcpgpio_softc *,
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unsigned int, uint8_t, uint8_t *);
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int (*write)(struct mcpgpio_softc *,
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unsigned int, uint8_t, uint8_t);
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};
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struct mcpgpio_softc {
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device_t sc_dev;
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const struct mcpgpio_variant *sc_variant;
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struct gpio_chipset_tag sc_gpio_gc;
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gpio_pin_t *sc_gpio_pins;
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unsigned int sc_npins;
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uint8_t sc_iocon; /* I/O configuration */
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/* Bus-specific access functions. */
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const struct mcpgpio_accessops *sc_accessops;
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};
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void mcpgpio_attach(struct mcpgpio_softc *);
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#endif /* _DEV_IC_MCP23xxxGPIOVAR_H_ */
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