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/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* 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_interrupt(void *arg)
{
atsam_sc16is752_spi_context *ctx = arg;
sc16is752_interrupt_handler(&ctx->base.base);
/* Interrupt Status Register shall be read to clear the interrupt flag */
ctx->irq_pin.pio->PIO_ISR;
}
static bool atsam_sc16is752_install_interrupt(sc16is752_context *base)
{
atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
rtems_status_code sc;
PIO_Configure(&ctx->irq_pin, 1);
PIO_EnableIt(&ctx->irq_pin);
sc = rtems_interrupt_server_handler_install(
RTEMS_ID_NONE,
ctx->irq_pin.id,
"Test",
RTEMS_INTERRUPT_SHARED,
atsam_sc16i752_interrupt,
ctx
);
return sc == RTEMS_SUCCESSFUL;
}
static void atsam_sc16is752_remove_interrupt(sc16is752_context *base)
{
atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
rtems_status_code sc;
sc = rtems_interrupt_server_handler_remove(
RTEMS_ID_NONE,
ctx->irq_pin.id,
atsam_sc16i752_interrupt,
ctx
);
assert(sc == RTEMS_SUCCESSFUL);
}
int atsam_sc16is752_spi_create(
atsam_sc16is752_spi_context *ctx,
const char *device_path,
sc16is752_mode mode,
uint32_t input_frequency,
const char *spi_path,
uint8_t spi_chip_select,
uint32_t spi_speed_hz,
const Pin *irq_pin
)
{
ctx->base.base.mode = mode;
ctx->base.base.input_frequency = input_frequency;
ctx->base.base.install_irq = atsam_sc16is752_install_interrupt;
ctx->base.base.remove_irq = atsam_sc16is752_remove_interrupt;
ctx->base.spi_path = spi_path;
ctx->base.cs = spi_chip_select;
ctx->base.speed_hz = spi_speed_hz;
ctx->irq_pin = *irq_pin;
return sc16is752_spi_create(&ctx->base, device_path);
}
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