px4-firmware/nuttx/graphics/nxconsole/nxcon_register.c

161 lines
5.0 KiB
C

/****************************************************************************
* 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));
sem_init(&priv->exclsem, 0, 1);
#ifdef CONFIG_DEBUG
priv->holder = NO_HOLDER;
#endif
#ifdef CONFIG_NXCONSOLE_NXKBDIN
sem_init(&priv->waitsem, 0, 0);
#endif
/* 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;
}
FAR const struct nx_font_s *fontset;
/* Get information about the font set being used and save this in the
* state structure
*/
fontset = nxf_getfontset(priv->font);
priv->fheight = fontset->mxheight;
priv->fwidth = fontset->mxwidth;
priv->spwidth = fontset->spwidth;
/* Set up the text cache */
priv->maxchars = CONFIG_NXCONSOLE_MXCHARS;
/* Set up the font glyph bitmap cache */
priv->maxglyphs = CONFIG_NXCONSOLE_CACHESIZE;
/* Set the initial display position */
nxcon_home(priv);
/* Show the cursor */
priv->cursor.code = CONFIG_NXCONSOLE_CURSORCHAR;
nxcon_showcursor(priv);
/* Register the driver */
snprintf(devname, NX_DEVNAME_SIZE, NX_DEVNAME_FORMAT, minor);
ret = register_driver(devname, &g_nxcon_drvrops, 0666, priv);
if (ret < 0)
{
gdbg("Failed to register %s\n", devname);
}
return (NXCONSOLE)priv;
errout:
kfree(priv);
return NULL;
}