forked from Imagelibrary/rtems
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
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/*
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* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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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(RTEMS_INTERRUPT_SERVER_DEFAULT,
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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 char *device_path,
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sc16is752_mode mode,
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uint32_t input_frequency,
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const char *spi_path,
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uint8_t spi_chip_select,
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uint32_t spi_speed_hz,
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const Pin *irq_pin
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)
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{
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ctx->base.base.mode = mode;
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ctx->base.base.input_frequency = 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 = spi_path;
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ctx->base.cs = spi_chip_select;
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ctx->base.speed_hz = spi_speed_hz;
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ctx->irq_pin = *irq_pin;
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return sc16is752_spi_create(&ctx->base, device_path);
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}
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