mirror of
https://github.com/Qortal/Brooklyn.git
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108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*
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Copyright (c) 2015 Raspberry Pi (Trading) Ltd.
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All rights reserved.
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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 are met:
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* 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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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// Utility for driving mailbox interface to VideoCore
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <assert.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h> /* ioctl */
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#define DEVICE_FILE_NAME "/dev/vcio"
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#define MAJOR_NUM 100
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#define IOCTL_MBOX_PROPERTY _IOWR(MAJOR_NUM, 0, char *)
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/*
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* use ioctl to send mbox property message
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*/
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static int mbox_property(int file_desc, void *buf)
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{
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int ret_val = ioctl(file_desc, IOCTL_MBOX_PROPERTY, buf);
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if (ret_val < 0) {
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printf("ioctl_set_msg failed:%d\n", ret_val);
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}
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return ret_val;
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}
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static int mbox_open()
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{
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int file_desc;
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// open a char device file used for communicating with kernel mbox driver
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file_desc = open(DEVICE_FILE_NAME, 0);
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if (file_desc < 0) {
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printf("Can't open device file: %s\n", DEVICE_FILE_NAME);
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printf("Try creating a device file with: sudo mknod %s c %d 0\n", DEVICE_FILE_NAME, MAJOR_NUM);
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exit(-1);
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}
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return file_desc;
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}
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static void mbox_close(int file_desc) {
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close(file_desc);
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}
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#define MAX_WORDS 256
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int main(int argc, char *argv[])
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{
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int mb = mbox_open();
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unsigned words[MAX_WORDS] = {};
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int i;
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if (argc < 2 || argc+1 >= MAX_WORDS)
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{
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printf("Usage %s [word0] [word1] ...\n", argv[0]);
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return 1;
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}
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words[0] = (argc+2) * sizeof words[0];
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words[1] = 0; // process request
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for (i=1; i<argc; i++)
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words[i+1] = strtoul(argv[i], 0, 0);
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words[argc+1] = 0; // end tag
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int s = mbox_property(mb, words);
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mbox_close(mb);
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for (i=0; i<argc+2; i++)
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printf("0x%08x ", words[i]);
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printf("\n");
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return s;
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}
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