124 lines
4.2 KiB
C
124 lines
4.2 KiB
C
/****************************************************************************
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* nuttx/graphics/nxconsole/nxcon_register.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include "nxcon_internal.h"
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxcon_allocate
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****************************************************************************/
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FAR struct nxcon_state_s *
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nxcon_register(NXCONSOLE handle, FAR struct nxcon_window_s *wndo,
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FAR const struct nxcon_operations_s *ops, int minor)
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{
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FAR struct nxcon_state_s *priv;
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char devname[NX_DEVNAME_SIZE];
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int ret;
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DEBUGASSERT(handle && wndo && ops && (unsigned)minor < 256);
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/* Allocate the driver structure */
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priv = (FAR struct nxcon_state_s *)kzalloc(sizeof(struct nxcon_state_s));
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if (!priv)
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{
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gdbg("Failed to allocate the NX driver structure\n");
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return NULL;
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}
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/* Initialize the driver structure */
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priv->ops = ops;
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priv->handle = handle;
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priv->minor = minor;
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memcpy(&priv->wndo, wndo, sizeof( struct nxcon_window_s));
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/* Select the font */
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priv->font = nxf_getfonthandle(wndo->fontid);
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if (!priv->font)
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{
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gdbg("Failed to get font ID %d: %d\n", wndo->fontid, errno);
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goto errout;
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}
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/* Register the driver */
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snprintf(devname, NX_DEVNAME_SIZE, NX_DEVNAME_FORMAT, minor);
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ret = register_driver(devname, &g_nxcondrvrops, 0666, priv);
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if (ret < 0)
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{
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gdbg("Failed to register %s\n", devname);
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}
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return (NXCONSOLE)priv;
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errout:
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kfree(priv);
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return NULL;
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}
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