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- /****************************************************************************
- * graphics/nxmu/nx_start.c
- *
- * Copyright (C) 2013, 2016 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 <stdbool.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <sched.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/board.h>
- #include <nuttx/kthread.h>
- #include <nuttx/nx/nx.h>
- #include "nxfe.h"
- /****************************************************************************
- * Private Data
- ****************************************************************************/
- static bool g_nxserver_started;
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nx_server
- *
- * Description:
- * NX server thread. This is the entry point into the server kernel
- * thread that serializes the multi-threaded accesses to the display.
- *
- * Input Parameters:
- * Standard task start-up parameters (none of which are used)
- *
- * Returned Value:
- * This function does not normally return but may exit with EXIT_FAILURE
- * under certain error conditions.
- *
- ****************************************************************************/
- int nx_server(int argc, char *argv[])
- {
- FAR NX_DRIVERTYPE *dev;
- int ret;
- #if defined(CONFIG_NXSTART_EXTERNINIT)
- /* Use external graphics driver initialization */
- dev = board_graphics_setup(CONFIG_NXSTART_DEVNO);
- if (!dev)
- {
- gerr("ERROR: board_graphics_setup failed, devno=%d\n", CONFIG_NXSTART_DEVNO);
- return EXIT_FAILURE;
- }
- #elif defined(CONFIG_NX_LCDDRIVER)
- /* Initialize the LCD device */
- ret = board_lcd_initialize();
- if (ret < 0)
- {
- gerr("ERROR: board_lcd_initialize failed: %d\n", ret);
- return EXIT_FAILURE;
- }
- /* Get the device instance */
- dev = board_lcd_getdev(CONFIG_NXSTART_DEVNO);
- if (!dev)
- {
- gerr("ERROR: board_lcd_getdev failed, devno=%d\n", CONFIG_NXSTART_DEVNO);
- return EXIT_FAILURE;
- }
- /* Turn the LCD on at 75% power */
- (void)dev->setpower(dev, ((3*CONFIG_LCD_MAXPOWER + 3)/4));
- #else /* CONFIG_NX_LCDDRIVER */
- /* Initialize the frame buffer device.
- * REVISIT: display == 0 is assumed.
- */
- ret = up_fbinitialize(CONFIG_NXSTART_DISPLAYNO);
- if (ret < 0)
- {
- gerr("ERROR: up_fbinitialize failed: %d\n", ret);
- return EXIT_FAILURE;
- }
- dev = up_fbgetvplane(CONFIG_NXSTART_DISPLAYNO, CONFIG_NXSTART_VPLANE);
- if (!dev)
- {
- gerr("ERROR: up_fbgetvplane failed, vplane=%d\n", CONFIG_NXSTART_VPLANE);
- return EXIT_FAILURE;
- }
- #endif /* CONFIG_NX_LCDDRIVER */
- /* Then start the server (nx_run does not normally return) */
- ret = nx_run(dev);
- ginfo("nx_run returned: %d\n", ret);
- return EXIT_FAILURE;
- }
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nx_start
- *
- * Description:
- * nx_start() provides a wrapper function to simplify and standardize the
- * starting of the NX server.
- *
- * NOTE: Currently, many applications include logic to start the NX
- * server from application initialization logic. That, of course, cannot
- * work in the NuttX kernel build because the resources required by the
- * NX server are private to the kernel mode logic.
- *
- * nx_start() can be called (indirectly) from applications via the
- * boardctl() interface with the BOARDIOC_NX_START command.
- *
- * Input Parameters:
- * None
- *
- * Returned Value:
- * Zero (OK) is returned on success. This indicates that the NX server
- * has been successfully started, is running, and waiting to accept
- * connections from NX clients.
- *
- * A negated errno value is returned on failure. The errno value indicates
- * the nature of the failure.
- *
- ****************************************************************************/
- int nx_start(void)
- {
- /* Do nothing is the server has already been started */
- if (!g_nxserver_started)
- {
- pid_t server;
- /* Start the server kernel thread */
- ginfo("Starting server task\n");
- server = kernel_thread("NX Server", CONFIG_NXSTART_SERVERPRIO,
- CONFIG_NXSTART_SERVERSTACK, nx_server, NULL);
- if (server < 0)
- {
- int errcode = errno;
- DEBUGASSERT(errcode > 0);
- gerr("ERROR: Failed to create nx_server kernel thread: %d\n", errcode);
- return -errcode;
- }
- g_nxserver_started = true;
- /* Wait a bit to make sure that the server get started. NOTE that
- * this operation cannot be done from the IDLE thread!
- */
- usleep(50*1000);
- }
- return OK;
- }
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