1 files changed, 85 insertions, 0 deletions
diff --git a/bsps/arm/atsam/spi/sc16is752.c b/bsps/arm/atsam/spi/sc16is752.c
new file mode 100644
index 0000000000..b17f9ffc14
--- /dev/null
+++ b/bsps/arm/atsam/spi/sc16is752.c
@@ -0,0 +1,85 @@
+
+/*
+ * 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);
+}