Add beginnings of an NX console driver

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4524 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 123 insertions, 0 deletions

diff --git a/nuttx/graphics/nxconsole/nxcon_register.c b/nuttx/graphics/nxconsole/nxcon_register.c
new file mode 100644
index 000000000..d85b5ffc3
--- /dev/null
+++ b/nuttx/graphics/nxconsole/nxcon_register.c
@@ -0,0 +1,123 @@
+/****************************************************************************
+ * nuttx/graphics/nxconsole/nxcon_register.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/kmalloc.h>
+#include <nuttx/fs/fs.h>
+
+#include "nxcon_internal.h"
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxcon_allocate
+ ****************************************************************************/
+
+FAR struct nxcon_state_s *
+  nxcon_register(NXCONSOLE handle, FAR struct nxcon_window_s *wndo,
+                 FAR const struct nxcon_operations_s *ops, int minor)
+{
+  FAR struct nxcon_state_s *priv;
+  char devname[NX_DEVNAME_SIZE];
+  int ret;
+
+  DEBUGASSERT(handle && wndo && ops && (unsigned)minor < 256);
+
+  /* Allocate the driver structure */
+
+  priv = (FAR struct nxcon_state_s *)kzalloc(sizeof(struct nxcon_state_s));
+  if (!priv)
+    {
+      gdbg("Failed to allocate the NX driver structure\n");
+      return NULL;
+    }
+
+  /* Initialize the driver structure */
+
+  priv->ops     = ops;
+  priv->handle  = handle;
+  priv->minor   = minor;
+  memcpy(&priv->wndo, wndo, sizeof( struct nxcon_window_s));
+
+  /* Select the font */
+
+  priv->font = nxf_getfonthandle(wndo->fontid);
+  if (!priv->font)
+    {
+      gdbg("Failed to get font ID %d: %d\n", wndo->fontid, errno);
+      goto errout;
+    }
+
+  /* Register the driver */
+
+  snprintf(devname, NX_DEVNAME_SIZE, NX_DEVNAME_FORMAT, minor);
+  ret = register_driver(devname, &g_nxcondrvrops, 0666, priv);
+  if (ret < 0)
+    {
+      gdbg("Failed to register %s\n", devname);
+    }
+  return (NXCONSOLE)priv;
+
+errout:
+  kfree(priv);
+  return NULL;
+}