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534f9dbe13
The external UART over SPI device SC16IS752 uses the interrupt server for interrupt processing. The interrupt server is also heavily used by libbsd. The interrupt processing for the SC16IS752 is time critical and doesn't work if network traffic is processed at the same priority. With #4033 custom interrupt servers are available. Change atsam_sc16is752_spi_create() to support user-defined interrupt servers. Introduced atsam_sc16is752_spi_config to cut down the argument count of this function. Close #4038.
83 lines
2.3 KiB
C
83 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(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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