drivers: can: Add syscall handlers for CAN API

This commit adds generic syscall handlers for the CAN API

Signed-off-by: Alexander Wachter <[email protected]>

Author: Alexander Wachter

drivers/can/CMakeLists.txt

@@ -0,0 +1 @@
+zephyr_sources_ifdef(CONFIG_USERSPACE   can_handlers.c)

drivers/can/can_handlers.c

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018 Alexander Wachter
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <syscall_handler.h>
+#include <can.h>
+
+_SYSCALL_HANDLER(can_configure, dev, mode, bitrate) {
+
+	_SYSCALL_OBJ(dev, K_OBJ_DRIVER_CAN);
+
+	return _impl_can_configure((struct device *)dev, mode, bitrate);
+}
+
+_SYSCALL_HANDLER(can_send, dev, msg) {
+	_SYSCALL_OBJ(dev, K_OBJ_DRIVER_CAN);
+
+	/* We need to be able to read the data */
+	_SYSCALL_MEMORY_ARRAY_READ(msg->data, msg->dlc, sizeof(msg->data));
+
+	return _impl_can_send((struct device *)dev, (struct can_msg *)msg)
+}
+
+_SYSCALL_HANDLER(can_attach_msgq, dev, msgq, filter) {
+	_SYSCALL_OBJ(dev, K_OBJ_DRIVER_CAN);
+
+	/* We need to be able to write the data */
+	_SYSCALL_MEMORY_WRITE(msgq, sizeof(msgq));
+	_SYSCALL_MEMORY_WRITE(msgq->buffer_start,
+			      msgq->buffer_end - msgq->buffer_start);
+
+	return _impl_can_attach_msgq((struct device *)dev,
+				     (struct k_msgq *)msgq,
+				     (const struct can_filter *) filter);
+}
+
+_SYSCALL_HANDLER(can_attach_isr, dev, isr, filter) {
+	_SYSCALL_OBJ(dev, K_OBJ_DRIVER_CAN);
+
+	return _impl_can_attach_isr((struct device *)dev,
+				    (can_rx_callback_t)isr,
+				    (const struct can_filter *) filter);
+}
+
+_SYSCALL_HANDLER(can_detach, dev, filter_id) {
+	_SYSCALL_OBJ(dev, K_OBJ_DRIVER_CAN);
+
+	return _impl_can_detach((struct device *)dev, (int)filter_id);
+}