[PATCH v4] cpukit/dev/can: Added CAN support
---
cpukit/dev/can/can.c | 521 +++
cpukit/include/dev/can/can-msg.h | 105 +
cpukit/include/dev/can/can-queue.h | 219 ++
cpukit/include/dev/can/can.h | 258 +++
spec/build/cpukit/librtemscpu.yml| 6 +
spec/build/testsuites/libtests/can01.yml | 19 +
spec/build/testsuites/libtests/grp.yml | 2 +
testsuites/libtests/can01/init.c | 257 +++
8 files changed, 1387 insertions(+)
create mode 100644 cpukit/dev/can/can.c
create mode 100644 cpukit/include/dev/can/can-msg.h
create mode 100644 cpukit/include/dev/can/can-queue.h
create mode 100644 cpukit/include/dev/can/can.h
create mode 100644 spec/build/testsuites/libtests/can01.yml
create mode 100644 testsuites/libtests/can01/init.c
diff --git a/cpukit/dev/can/can.c b/cpukit/dev/can/can.c
new file mode 100644
index 00..02377a9098
--- /dev/null
+++ b/cpukit/dev/can/can.c
@@ -0,0 +1,521 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup CANBus
+ *
+ * @brief Controller Area Network (CAN) Bus Implementation
+ *
+ */
+
+/*
+ * Copyright (C) 2022 Prashanth S (fishesprasha...@gmail.com)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include
+#include
+
+#include
+#include
+
+#include
+#include
+
+#include
+
+#define can_interrupt_lock_acquire(bus) \
+ do { \
+ CAN_DEBUG_LOCK("acquiring lock %s:%d\n", __FILE__,
__LINE__); \
+ real_can_interrupt_lock_acquire(bus);
\
+ } while (0);
+
+#define can_interrupt_lock_release(bus) \
+ do { \
+ CAN_DEBUG_LOCK("releasing lock %s:%d\n", __FILE__,
__LINE__); \
+ real_can_interrupt_lock_release(bus);
\
+ } while (0);
+
+static ssize_t
+can_bus_open(rtems_libio_t *iop, const char *path, int oflag, mode_t mode);
+static ssize_t
+can_bus_read(rtems_libio_t *iop, void *buffer, size_t count);
+static ssize_t
+can_bus_write(rtems_libio_t *iop, const void *buffer, size_t count);
+static ssize_t
+can_bus_ioctl(rtems_libio_t *iop, ioctl_command_t request, void *buffer);
+
+static int can_xmit(struct can_bus *bus);
+
+static int can_create_sem(struct can_bus *);
+static int try_sem(struct can_bus *);
+static int take_sem(struct can_bus *);
+static int give_sem(struct can_bus *);
+
+/* sem_count this is for debug purpose, for debugging
+the take_sem and give_sem
+*/
+static int sem_count = 0;
+
+static void can_bus_obtain(can_bus *bus)
+{
+ printf("can_bus_obtain Entry\n");
+ rtems_mutex_lock(&bus->mutex);
+ printf("can_bus_obtain Exit\n");
+}
+
+static void can_bus_release(can_bus *bus)
+{
+ printf("can_bus_release Entry\n");
+ rtems_mutex_unlock(&bus->mutex);
+ printf("can_bus_release Exit\n");
+}
+
+static void can_bus_destroy_mutex(struct can_bus *bus)
+{
+ rtems_mutex_destroy(&bus->mutex);
+}
+
+static int can_create_sem(struct can_bus *bus)
+{
+ int ret = 0;
+
+ ret = rtems_semaphore_create(rtems_build_name('c', 'a', 'n', bus->index),
+ CAN_TX_BUF_COUNT, RTEMS_FIFO | RTEMS_COUNTING_SEMAPHORE | RTEMS_LOCAL,
+ 0, &bus->tx_fifo_sem_id);
+
+ if (ret != 0) {
+printf("can_create_sem: rtems_semaphore_create failed %d\n", ret);
+ }
+
+ return ret;
+}
+
+static void can_free_tx_semaphore(struct can_bus *bus)
+{
+ rtems_semaphore_delete(bus->tx_fifo_sem_id);
+}
+
+static void real_can_interrupt_lock_acquire(struct can_bus *bus)
+{
+ bus->can_dev_ops->dev_int(bus->priv, false);
+ can_bus_obtain(bus);
+}
+
+static void
Re: devel Digest, Vol 129, Issue 37
Hi All,
This is a review request for DCAN (Work in Progress) support.
As the patch size exceeds the mail limit, I am attaching the patch in
compressed format.
Regards
Prashanth S
Prashanth S
On Sun, 14 Aug 2022 at 13:56, wrote:
>
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> Today's Topics:
>
>1. [PATCH v4] cpukit/dev/can: Added CAN support (Prashanth S)
>
>
> --
>
> Message: 1
> Date: Sun, 14 Aug 2022 13:56:16 +0530
> From: Prashanth S
> To: devel@rtems.org
> Cc: Prashanth S
> Subject: [PATCH v4] cpukit/dev/can: Added CAN support
> Message-ID: <20220814082616.7345-1-fishesprasha...@gmail.com>
>
> ---
> cpukit/dev/can/can.c | 521 +++
> cpukit/include/dev/can/can-msg.h | 105 +
> cpukit/include/dev/can/can-queue.h | 219 ++
> cpukit/include/dev/can/can.h | 258 +++
> spec/build/cpukit/librtemscpu.yml| 6 +
> spec/build/testsuites/libtests/can01.yml | 19 +
> spec/build/testsuites/libtests/grp.yml | 2 +
> testsuites/libtests/can01/init.c | 257 +++
> 8 files changed, 1387 insertions(+)
> create mode 100644 cpukit/dev/can/can.c
> create mode 100644 cpukit/include/dev/can/can-msg.h
> create mode 100644 cpukit/include/dev/can/can-queue.h
> create mode 100644 cpukit/include/dev/can/can.h
> create mode 100644 spec/build/testsuites/libtests/can01.yml
> create mode 100644 testsuites/libtests/can01/init.c
>
> diff --git a/cpukit/dev/can/can.c b/cpukit/dev/can/can.c
> new file mode 100644
> index 00..02377a9098
> --- /dev/null
> +++ b/cpukit/dev/can/can.c
> @@ -0,0 +1,521 @@
> +/* SPDX-License-Identifier: BSD-2-Clause */
> +
> +/**
> + * @file
> + *
> + * @ingroup CANBus
> + *
> + * @brief Controller Area Network (CAN) Bus Implementation
> + *
> + */
> +
> +/*
> + * Copyright (C) 2022 Prashanth S (fishesprasha...@gmail.com)
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in the
> + * documentation and/or other materials provided with the distribution.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
> IS"
> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#include
> +#include
> +
> +#include
> +#include
> +
> +#include
> +#include
> +
> +#include
> +
> +#define can_interrupt_lock_acquire(bus) \
> + do { \
> + CAN_DEBUG_LOCK("acquiring lock %s:%d\n",
> __FILE__, __LINE__); \
> + real_can_interrupt_lock_acquire(bus);
> \
> + } while (0);
> +
> +#define can_interrupt_lock_release(bus) \
> + do { \
> + CAN_DEBUG_LOCK("releasing lock %s:%d\n",
> __FILE__, __LINE__); \
> + real_can_interrupt_lock_release(bus);
> \
> + } while (0);
> +
> +static ssize_t
> +can_bus_open(rtems_libio_t *iop, const char *path, int oflag, mode_t mode);
> +static ssize_t
> +can_bus_read(rtems_libio_t *iop, void *buffer, size_t count);
> +static ssize_t
> +can_bus_write(rtems_libio_t *iop, const void *buffer, size_t count);
> +static ssize_t
> +can_bus_ioctl(rtems_libio_t *iop, ioctl_command_t request, void *buffer);
> +
> +static int can_xmit(struct can_bus *bus);
> +
> +static int can_create_sem(struct can_
