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/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp/sc16is752.h>
#include <rtems/irq-extension.h>
static void atsam_sc16i752_irqs_handler(void *arg)
{
atsam_sc16is752_spi_context *ctx = arg;
sc16is752_interrupt_handler(&ctx->base.base);
PIO_EnableIt(&ctx->irq_pin);
}
static void atsam_sc16i752_interrupt(const Pin *pin, void *arg)
{
atsam_sc16is752_spi_context *ctx = arg;
if(PIO_ItIsActive(&ctx->irq_pin)) {
PIO_DisableIt(&ctx->irq_pin);
rtems_interrupt_server_entry_submit(&ctx->irqs_entry);
}
}
static bool atsam_sc16is752_install_interrupt(sc16is752_context *base)
{
atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
rtems_status_code sc;
uint8_t rv;
sc = rtems_interrupt_server_entry_initialize(ctx->irqs_index,
&ctx->irqs_entry);
rtems_interrupt_server_action_prepend(&ctx->irqs_entry,
&ctx->irqs_action, atsam_sc16i752_irqs_handler, ctx);
rv = PIO_Configure(&ctx->irq_pin, 1);
PIO_ConfigureIt(&ctx->irq_pin, atsam_sc16i752_interrupt, ctx);
PIO_EnableIt(&ctx->irq_pin);
return (sc == RTEMS_SUCCESSFUL) && (rv == 1);
}
static void atsam_sc16is752_remove_interrupt(sc16is752_context *base)
{
atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
rtems_status_code sc;
PIO_DisableIt(&ctx->irq_pin);
sc = PIO_RemoveIt(&ctx->irq_pin, atsam_sc16i752_interrupt, ctx);
assert(sc == RTEMS_SUCCESSFUL);
}
int atsam_sc16is752_spi_create(
atsam_sc16is752_spi_context *ctx,
const atsam_sc16is752_spi_config *config
)
{
ctx->base.base.mode = config->mode;
ctx->base.base.input_frequency = config->input_frequency;
ctx->base.base.install_irq = atsam_sc16is752_install_interrupt;
ctx->base.base.remove_irq = atsam_sc16is752_remove_interrupt;
ctx->base.spi_path = config->spi_path;
ctx->base.cs = config->spi_chip_select;
ctx->base.speed_hz = config->spi_speed_hz;
ctx->irq_pin = config->irq_pin;
ctx->irqs_index = config->server_index;
return sc16is752_spi_create(&ctx->base, config->device_path);
}
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