3681c8d718
This enables the use of GPIO pins as interrupt sources for kernel devices directly attached to gpiobus (userland notification will be added soon). The use of gpio interrupts for other kernel devices will be possible when intrng is complete. All GPIO pins can be set to trigger on: - active-low; - active-high; - rising edge; - falling edge. Tested on: Beaglebone-black
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/*-
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* Copyright (c) 2011
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* Ben Gray <ben.r.gray@gmail.com>.
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* 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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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef TI_GPIO_H
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#define TI_GPIO_H
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/* The maximum number of banks for any SoC */
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#define MAX_GPIO_BANKS 6
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/*
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* Maximum GPIOS possible, max of *_MAX_GPIO_BANKS * *_INTR_PER_BANK.
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* These are defined in ti_gpio.c
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*/
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#define MAX_GPIO_INTRS 8
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/**
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* Structure that stores the driver context.
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*
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* This structure is allocated during driver attach.
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*/
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struct ti_gpio_softc {
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device_t sc_dev;
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/* Interrupt trigger type and level. */
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enum intr_trigger *sc_irq_trigger;
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enum intr_polarity *sc_irq_polarity;
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int sc_maxpin;
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struct mtx sc_mtx;
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/*
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* The memory resource(s) for the PRCM register set, when the device is
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* created the caller can assign up to 6 memory regions depending on
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* the SoC type.
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*/
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struct resource *sc_mem_res[MAX_GPIO_BANKS];
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struct resource *sc_irq_res[MAX_GPIO_INTRS];
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/* Interrupt events. */
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struct intr_event **sc_events;
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/* The handle for the register IRQ handlers. */
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void *sc_irq_hdl[MAX_GPIO_INTRS];
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};
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#endif /* TI_GPIO_H */
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