Revert "cpukit/dev/can: Added CAN support"

This reverts commit cd91b37dce728b372f164355719a4e601e12e7b3.

Closes #4803.

1 files changed, 0 insertions, 505 deletions

diff --git a/cpukit/dev/can/can.c b/cpukit/dev/can/can.c
deleted file mode 100644
index 2e6d5df65b..0000000000
--- a/cpukit/dev/can/can.c
+++ /dev/null
@@ -1,505 +0,0 @@
-/* SPDX-License-Identifier: BSD-2-Clause */
-
-/**
- * @file
- *
- * @ingroup CANBus
- *
- * @brief Controller Area Network (CAN) Bus Implementation
- *
- */
-
-/*
- * Copyright (C) 2022 Prashanth S (fishesprashanth@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 <string.h>
-#include <stdlib.h>
-
-#include <fcntl.h>
-
-#include <rtems/imfs.h>
-#include <rtems/thread.h>
-
-#include <dev/can/canqueueimpl.h>
-#include <dev/can/can.h>
-
-#define can_interrupt_lock_acquire(bus) \
-                      do {              \
-                           CAN_DEBUG_LOCK("acquiring lock\n");    \
-                           real_can_interrupt_lock_acquire(bus);  \
-                         } while (0);
-
-#define can_interrupt_lock_release(bus) \
-                      do {              \
-                           CAN_DEBUG_LOCK("releasing lock\n");    \
-                           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_bus_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 *);
-
-
-static void can_bus_obtain(can_bus *bus)
-{
-  CAN_DEBUG("can_bus_obtain Entry\n");
-  rtems_mutex_lock(&bus->mutex);
-  CAN_DEBUG("can_bus_obtain Exit\n");
-}
-
-static void can_bus_release(can_bus *bus)
-{
-  CAN_DEBUG("can_bus_release Entry\n");
-  rtems_mutex_unlock(&bus->mutex);
-  CAN_DEBUG("can_bus_release Exit\n");
-}
-
-static void can_bus_destroy_mutex(struct can_bus *bus)
-{
-  rtems_mutex_destroy(&bus->mutex);
-}
-
-static int can_bus_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) {
-    CAN_ERR("can_create_sem: rtems_semaphore_create failed %d\n", ret);
-  }
-
-  return ret;
-}
-
-static void can_bus_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 real_can_interrupt_lock_release(struct can_bus *bus)
-{
-  can_bus_release(bus);
-  bus->can_dev_ops->dev_int(bus->priv, true);
-}
-
-static int take_sem(struct can_bus *bus)
-{
-  int ret = rtems_semaphore_obtain(bus->tx_fifo_sem_id, RTEMS_WAIT, 
-                                RTEMS_NO_TIMEOUT);
-#ifdef CAN_DEBUG_LOCK
-  if (ret == RTEMS_SUCCESSFUL) {
-    bus->sem_count++;
-    CAN_DEBUG_LOCK("take_sem: Semaphore count = %d\n", bus->sem_count);
-    if (bus->sem_count > CAN_TX_BUF_COUNT) {
-      CAN_ERR("take_sem error: sem_count is misleading\n");
-      return RTEMS_INTERNAL_ERROR;
-    }
-  }
-#endif /* CAN_DEBUG_LOCK */
-
-  return ret;
-}
-
-static int give_sem(struct can_bus *bus)
-{
-  int ret = rtems_semaphore_release(bus->tx_fifo_sem_id);
-
-#ifdef CAN_DEBUG_LOCK
-  if (ret == RTEMS_SUCCESSFUL) {
-    bus->sem_count--;
-    CAN_DEBUG_LOCK("give_sem: Semaphore count = %d\n", bus->sem_count);
-    if (bus->sem_count < 0) {
-      CAN_ERR("give_sem error: sem_count is misleading\n");
-      return RTEMS_INTERNAL_ERROR;
-    }
-  }
-#endif /* CAN_DEBUG_LOCK */
-
-  return ret;
-}
-
-static int try_sem(struct can_bus *bus)
-{
-  int ret = rtems_semaphore_obtain(bus->tx_fifo_sem_id, RTEMS_NO_WAIT, 
-                                RTEMS_NO_TIMEOUT);
-#ifdef CAN_DEBUG_LOCK
-  if (ret == RTEMS_SUCCESSFUL) {
-    bus->sem_count++;
-    CAN_DEBUG_LOCK("try_sem: Semaphore count = %d\n", bus->sem_count);
-    if (bus->sem_count > CAN_TX_BUF_COUNT) {
-      CAN_ERR("take_sem error: sem_count is misleading\n");
-      return RTEMS_INTERNAL_ERROR;
-    }
-  }
-#endif /* CAN_DEBUG_LOCK */
-
-  return ret;
-}
-
-static ssize_t 
-can_bus_open(rtems_libio_t *iop, const char *path, int oflag, mode_t mode)
-{
-  CAN_DEBUG("can_bus_open\n");
-
-  return 0;
-} 
-
-/* Should be called only with CAN interrupts disabled */
-int can_receive(struct can_bus *bus, struct can_msg *msg)
-{
-  memcpy(&bus->can_rx_msg, msg, CAN_MSG_LEN(msg));
-
-  return CAN_MSG_LEN(msg);
-}
-
-/* FIXME: Should be modified to read count number of bytes, Now sending one can_msg */
-static ssize_t can_bus_read(rtems_libio_t *iop, void *buffer, size_t count)
-{
-  int len;
-
-  can_bus *bus = IMFS_generic_get_context_by_iop(iop);
-  if (bus == NULL) {
-    return -RTEMS_NOT_DEFINED;
-  }
-
-  struct can_msg *msg = (struct can_msg *)buffer;
-
-  len = CAN_MSG_LEN(&bus->can_rx_msg);
-
-  if (count < len) {
-    CAN_DEBUG("can_bus_read: buffer size is small min sizeof(struct can_msg) = %u\n",
-                    sizeof(struct can_msg));
-    return -RTEMS_INVALID_SIZE;
-  }
-
-  can_interrupt_lock_acquire(bus);
-  memcpy(msg, &bus->can_rx_msg, len);
-  can_interrupt_lock_release(bus);
-
-  return len;
-}
-
-/* This function is a critical section and should be called 
- * with CAN interrupts disabled and mutually exclusive
- */
-static int can_xmit(struct can_bus *bus)
-{
-  int ret = RTEMS_SUCCESSFUL;
-
-  struct can_msg *msg = NULL;
-
-  CAN_DEBUG(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> can_xmit Entry\n");
-
-  while (1) {
-    CAN_DEBUG("can_dev_ops->dev_tx_ready\n");
-    if (bus->can_dev_ops->dev_tx_ready(bus->priv) != true) {
-      break;
-    }
-
-    CAN_DEBUG("can_tx_get_data_buf\n");
-    msg = can_bus_tx_get_data_buf(bus);
-    if (msg == NULL) {
-      break;
-    }
-
-    CAN_DEBUG("can_dev_ops->dev_tx\n");
-    ret = bus->can_dev_ops->dev_tx(bus->priv, msg);
-    if (ret != RTEMS_SUCCESSFUL) {
-        CAN_ERR("can_xmit: dev_send failed\n");
-        break;
-    }
-
-    ret = give_sem(bus);
-    if (ret != RTEMS_SUCCESSFUL) {
-      CAN_ERR("can_xmit: rtems_semaphore_release failed = %d\n", ret);
-      break;
-    }
-  }
-
-  CAN_DEBUG(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> can_xmit Exit\n");
-
-  return ret;
-}
-
-void can_print_msg(struct can_msg const *msg)
-{
-#ifdef CAN_DEBUG
-  CAN_DEBUG("\n----------------------------------------------------------------\n");
-  CAN_DEBUG("id = %d len = %d flags = 0x%08X\n", msg->id, msg->len, msg->flags);
-
-  CAN_DEBUG("msg->data[0] = 0x%08x\n", ((uint32_t *)msg->data)[0]);
-  CAN_DEBUG("msg->data[1] = 0x%08x\n", ((uint32_t *)msg->data)[1]);
-
-  for (int i = 0; i < msg->len; i++) {
-    CAN_DEBUG("%02x\n", ((char *)msg->data)[i]);
-  }
-
-  CAN_DEBUG("\n-----------------------------------------------------------------\n");
-#endif /* CAN_DEBUG */
-}
-
-/* can_tx_done should be called only with CAN interrupts disabled */
-int can_tx_done(struct can_bus *bus)
-{
-  CAN_DEBUG("------------ can_tx_done Entry\n");
-  int ret = RTEMS_SUCCESSFUL;
-
-  if (bus->can_dev_ops->dev_tx_ready(bus->priv) == true) {
-    ret = can_xmit(bus);
-  }
-  CAN_DEBUG("------------ can_tx_done Exit\n");
-  
-  return ret;
-}
-
-/* FIXME: Add support to send multiple CAN msgs for can_bus_write */
-static ssize_t 
-can_bus_write(rtems_libio_t *iop, const void *buffer, size_t count)
-{
-  can_bus *bus = IMFS_generic_get_context_by_iop(iop);
-
-  if (bus == NULL || bus->can_dev_ops->dev_tx == NULL) {
-    return -RTEMS_NOT_DEFINED;
-  }
-
-  int ret = RTEMS_SUCCESSFUL;
-
-  struct can_msg const *msg = buffer;
-  struct can_msg *fifo_buf = NULL;
-
-  uint32_t msg_size = CAN_MSG_LEN(msg);
-
-  CAN_DEBUG_TX("can_bus_write: can_msg_size = %u\n", msg_size);
-  if (msg_size > sizeof(struct can_msg)) {
-    CAN_ERR("can_bus_write:"
-          "can message len error msg_size = %u struct can_msg = %u\n", 
-          msg_size, sizeof(struct can_msg));
-    return -RTEMS_INVALID_SIZE;
-  }
-
-  if ((iop->flags & O_NONBLOCK) != 0) {
-    ret = try_sem(bus);
-    if (ret != RTEMS_SUCCESSFUL) {
-      return -ret;
-    }
-  } else {
-    ret = take_sem(bus);
-    if (ret != RTEMS_SUCCESSFUL) {
-      CAN_ERR("can_bus_write: cannot take semaphore\n");
-      return -ret;
-    }
-  }
-
-  can_interrupt_lock_acquire(bus);
-
-  fifo_buf = can_bus_tx_get_empty_buf(bus);
-  if (fifo_buf == NULL) {
-    /* This error will not happen until buffer counts are not synchronized */
-    CAN_ERR("can_bus_write: Buffer counts are not synchronized with semaphore count\n");
-    ret = -RTEMS_INTERNAL_ERROR;
-    goto release_lock_and_return;
-  }
-
-  CAN_DEBUG_TX("can_bus_write: empty_count = %u\n", bus->tx_fifo.empty_count);
-
-  CAN_DEBUG_TX("can_bus_write: copying msg from application to driver buffer\n");
-  memcpy(fifo_buf, msg, msg_size);
-
-  if (bus->can_dev_ops->dev_tx_ready(bus->priv) == true) {
-    ret = can_xmit(bus);
-    if (ret != RTEMS_SUCCESSFUL) {
-      ret = -ret;
-      goto release_lock_and_return;
-    }
-  }
-
-  ret = msg_size;
-
-release_lock_and_return:
-  can_interrupt_lock_release(bus);
-  return ret;
-}
-
-static ssize_t 
-can_bus_ioctl(rtems_libio_t *iop, ioctl_command_t request, void *buffer)
-{
-  can_bus *bus = IMFS_generic_get_context_by_iop(iop);
-
-  if (bus == NULL || bus->can_dev_ops->dev_ioctl == NULL) {
-    return -RTEMS_NOT_DEFINED;
-  }
-
-  can_bus_obtain(bus);
-
-  bus->can_dev_ops->dev_ioctl(bus->priv, NULL, 0);
-
-  can_bus_release(bus);
-
-  return RTEMS_SUCCESSFUL;
-}
-
-static const rtems_filesystem_file_handlers_r can_bus_handler = {
-  .open_h = can_bus_open,
-  .close_h = rtems_filesystem_default_close,
-  .read_h = can_bus_read,
-  .write_h = can_bus_write,
-  .ioctl_h = can_bus_ioctl,
-  .lseek_h = rtems_filesystem_default_lseek,
-  .fstat_h = IMFS_stat,
-  .ftruncate_h = rtems_filesystem_default_ftruncate,
-  .fsync_h = rtems_filesystem_default_fsync_or_fdatasync,
-  .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync,
-  .fcntl_h = rtems_filesystem_default_fcntl,
-  .kqfilter_h = rtems_filesystem_default_kqfilter,
-  .mmap_h = rtems_filesystem_default_mmap,
-  .poll_h = rtems_filesystem_default_poll,
-  .readv_h = rtems_filesystem_default_readv,
-  .writev_h = rtems_filesystem_default_writev
-};
-
-static void can_bus_node_destroy(IMFS_jnode_t *node)
-{
-  can_bus *bus;
-
-  bus = IMFS_generic_get_context_by_node(node);
-  (*bus->destroy)(bus);
-
-  IMFS_node_destroy_default(node);
-}
-
-static const 
-IMFS_node_control can_bus_node_control = IMFS_GENERIC_INITIALIZER(&can_bus_handler, 
-                    IMFS_node_initialize_generic, can_bus_node_destroy);
-
-rtems_status_code can_bus_register(can_bus *bus, const char *bus_path)
-{
-  int ret = RTEMS_SUCCESSFUL;
-
-  static uint8_t index = 0;
-
-  if (index == CAN_BUS_REG_MAX) {
-    CAN_ERR("can_bus_register: can bus registration limit reached\n");
-    return RTEMS_TOO_MANY;
-  }
-
-  bus->index = index++;
-  CAN_DEBUG("Registering CAN bus index = %u\n", bus->index);
-
-  ret = IMFS_make_generic_node(bus_path, S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO,
-                              &can_bus_node_control, bus);
-  if (ret != RTEMS_SUCCESSFUL) {
-    CAN_ERR("can_bus_register: Creating node failed = %d\n", ret);
-    goto fail;
-  }
-
-  if ((ret = can_bus_create_sem(bus)) != RTEMS_SUCCESSFUL) {
-    CAN_ERR("can_bus_register: can_create_sem failed = %d\n", ret);
-    goto fail;
-  }
-
-  if ((ret = can_bus_create_tx_buffers(bus)) != RTEMS_SUCCESSFUL) {
-    CAN_ERR("can_bus_register: can_create_tx_buffers failed = %d\n", ret);
-    goto free_tx_semaphore;
-  }
-
-  return ret;
-
-free_tx_semaphore:
-  rtems_semaphore_delete(bus->tx_fifo_sem_id);
-
-fail:
-  can_bus_destroy_mutex(bus);
-  return ret;
-
-}
-
-static void can_bus_destroy(can_bus *bus)
-{
-  can_bus_free_tx_buffers(bus);
-  can_bus_free_tx_semaphore(bus);
-  can_bus_destroy_mutex(bus);
-}
-
-static int can_bus_do_init(can_bus *bus, void (*destroy)(can_bus *bus))
-{
-  rtems_mutex_init(&bus->mutex, "CAN Bus");
-  bus->destroy = can_bus_destroy;
-
-  return RTEMS_SUCCESSFUL;
-}
-
-static void can_bus_destroy_and_free(can_bus *bus)
-{
-  can_bus_destroy(bus);
-  free(bus);
-}
-
-int can_bus_init(can_bus *bus)
-{
-  memset(bus, 0, sizeof(*bus));
-
-  return can_bus_do_init(bus, can_bus_destroy);
-}
-
-can_bus *can_bus_alloc_and_init(size_t size)
-{
-  can_bus *bus = NULL;
-
-  if (size >= sizeof(*bus)) {
-    bus = calloc(1, size);
-    if (bus == NULL) {
-      CAN_ERR("can_bus_alloc_and_init: calloc failed\b");
-      return NULL;
-    }
-
-    int rv = can_bus_do_init(bus, can_bus_destroy_and_free);
-    if (rv != 0) {
-      CAN_ERR("can_bus_alloc_and_init: can_bus_do_init failed\n");
-      return NULL;
-    }
-  }
-  return bus;
-}