testcases/kernel/device-drivers/usb/user_usb/user_tusb.c

/*
 *
 *   Copyright (c) International Business Machines  Corp., 2001
 *
 *   This program is free software;  you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include "../tusb/tusb.h"

static int tusb_fd = -1;		//file descriptor

int
tusbopen() {

    dev_t devt;
	struct stat     st;
    int    rc = 0;

    devt = makedev(TUSB_MAJOR, 0);

    if (rc) {
        if (errno == ENOENT) {
            /* dev node does not exist. */
            rc = mkdir(DEVICE_NAME, (S_IFDIR | S_IRWXU |
                                                S_IRGRP | S_IXGRP |
                                                S_IROTH | S_IXOTH));
        } else {
            printf("ERROR: Problem with Base dev directory.  Error code from stat() is %d\n\n", errno);
        }

    } else {
        if (!(st.st_mode & S_IFDIR)) {
            rc = unlink(DEVICE_NAME);
            if (!rc) {
                rc = mkdir(DEVICE_NAME, (S_IFDIR | S_IRWXU |
                                                S_IRGRP | S_IXGRP |
                                                S_IROTH | S_IXOTH));
            }
        }
    }

    /*
     * Check for the /dev/tbase node, and create if it does not
     * exist.
     */
    rc = stat(DEVICE_NAME, &st);
    if (rc) {
        if (errno == ENOENT) {
            /* dev node does not exist */
            rc = mknod(DEVICE_NAME, (S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP), devt);
        } else {
            printf("ERROR:Problem with tbase device node directory.  Error code form stat() is %d\n\n", errno);
        }

    } else {
        /*
         * /dev/tbase CHR device exists.  Check to make sure it is for a
         * block device and that it has the right major and minor.
         */
        if ((!(st.st_mode & S_IFCHR)) ||
             (st.st_rdev != devt)) {

            /* Recreate the dev node. */
            rc = unlink(DEVICE_NAME);
            if (!rc) {
                rc = mknod(DEVICE_NAME, (S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP), devt);
            }
        }
    }

    tusb_fd = open(DEVICE_NAME, O_RDWR);

    if (tusb_fd < 0) {
        printf("ERROR: Open of device %s failed %d errno = %d\n", DEVICE_NAME,tusb_fd, errno);
        return errno;
    }
    else {
        printf("Device opened successfully \n");
      return 0;
    }

}

int
tusbclose() {
	/*
	 * Close the tusb driver
	 */
	if (tusb_fd != -1) {
		close (tusb_fd);
		tusb_fd = -1;
	}

	return 0;
}

int main() {
	int 	rc = 0;

	rc = tusbopen();
	if (rc) {
		printf("tusb driver may not be loaded\n");
		exit(1);
	}

	/* test find device pointer */
	if (ki_generic(tusb_fd, FIND_DEV))
		printf("Failed to find usb device pointer\n");
	else
		printf("Found usb device pointer\n");

	/* test find usb hostcontroller */
	if (ki_generic(tusb_fd, TEST_FIND_HCD))
                printf("Failed to find usb hcd pointer\n");
        else
                printf("Found usb hcd pointer\n");

	/* test hcd probe */
	if (ki_generic(tusb_fd, TEST_HCD_PROBE))
                printf("Failed on hcd probe call\n");
        else
                printf("Success hcd probe\n");

        /* test hcd suspend */
        if (ki_generic(tusb_fd, TEST_HCD_SUSPEND))
                printf("Failed on hcd suspend call\n");
        else
                printf("Success hcd suspend\n");

        /* test hcd resume */
        if (ki_generic(tusb_fd, TEST_HCD_RESUME))
                printf("Failed on hcd resume call\n");
        else
                printf("Success hcd resume\n");

#if 0
	/* test hcd remove */
	if (ki_generic(tusb_fd, TEST_HCD_REMOVE))
		printf("Failed on hcd remove call\n");
	else
		printf("Success hcd remove\n");
#endif

	tusbclose();

	tst_exit();
}