mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
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96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (c) 2016 embedded brains GmbH & Co. KG
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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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* 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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#include <bsp/sc16is752.h>
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#include <rtems/irq-extension.h>
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static void atsam_sc16i752_irqs_handler(void *arg)
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{
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atsam_sc16is752_spi_context *ctx = arg;
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sc16is752_interrupt_handler(&ctx->base.base);
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PIO_EnableIt(&ctx->irq_pin);
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}
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static void atsam_sc16i752_interrupt(const Pin *pin, void *arg)
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{
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atsam_sc16is752_spi_context *ctx = arg;
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if(PIO_ItIsActive(&ctx->irq_pin)) {
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PIO_DisableIt(&ctx->irq_pin);
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rtems_interrupt_server_entry_submit(&ctx->irqs_entry);
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}
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}
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static bool atsam_sc16is752_install_interrupt(sc16is752_context *base)
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{
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atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
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rtems_status_code sc;
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uint8_t rv;
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sc = rtems_interrupt_server_entry_initialize(ctx->irqs_index,
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&ctx->irqs_entry);
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rtems_interrupt_server_action_prepend(&ctx->irqs_entry,
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&ctx->irqs_action, atsam_sc16i752_irqs_handler, ctx);
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rv = PIO_Configure(&ctx->irq_pin, 1);
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PIO_ConfigureIt(&ctx->irq_pin, atsam_sc16i752_interrupt, ctx);
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PIO_EnableIt(&ctx->irq_pin);
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return (sc == RTEMS_SUCCESSFUL) && (rv == 1);
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}
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static void atsam_sc16is752_remove_interrupt(sc16is752_context *base)
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{
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atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
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rtems_status_code sc;
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PIO_DisableIt(&ctx->irq_pin);
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sc = PIO_RemoveIt(&ctx->irq_pin, atsam_sc16i752_interrupt, ctx);
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assert(sc == RTEMS_SUCCESSFUL);
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}
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int atsam_sc16is752_spi_create(
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atsam_sc16is752_spi_context *ctx,
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const atsam_sc16is752_spi_config *config
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)
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{
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ctx->base.base.mode = config->mode;
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ctx->base.base.input_frequency = config->input_frequency;
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ctx->base.base.install_irq = atsam_sc16is752_install_interrupt;
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ctx->base.base.remove_irq = atsam_sc16is752_remove_interrupt;
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ctx->base.spi_path = config->spi_path;
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ctx->base.cs = config->spi_chip_select;
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ctx->base.speed_hz = config->spi_speed_hz;
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ctx->irq_pin = config->irq_pin;
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ctx->irqs_index = config->server_index;
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return sc16is752_spi_create(&ctx->base, config->device_path);
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}
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