ath3k_fw.c

/*-
 * Copyright (c) 2013 Adrian Chadd <[email protected]>
 * All rights reserved.
 *
 * 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,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 *    redistribution must be conditioned upon including a substantially
 *    similar Disclaimer requirement for further binary redistribution.
 *
 * NO WARRANTY
 * 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 NONINFRINGEMENT, MERCHANTIBILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <err.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "ath3k_fw.h"
#include "ath3k_dbg.h"

int
ath3k_fw_read(struct ath3k_firmware *fw, const char *fwname)
{
	int fd;
	struct stat sb;
	unsigned char *buf;
	ssize_t r;

	fd = open(fwname, O_RDONLY);
	if (fd < 0) {
		warn("%s: open: %s", __func__, fwname);
		return (0);
	}

	if (fstat(fd, &sb) != 0) {
		warn("%s: stat: %s", __func__, fwname);
		close(fd);
		return (0);
	}
	
	buf = calloc(1, sb.st_size);
	if (buf == NULL) {
		warn("%s: calloc", __func__);
		close(fd);
		return (0);
	}

	/* XXX handle partial reads */
	r = read(fd, buf, sb.st_size);
	if (r < 0) {
		warn("%s: read", __func__);
		free(buf);
		close(fd);
		return (0);
	}

	if (r != sb.st_size) {
		fprintf(stderr, "%s: read len %d != file size %d\n",
		    __func__,
		    (int) r,
		    (int) sb.st_size);
		free(buf);
		close(fd);
		return (0);
	}

	/* We have everything, so! */

	bzero(fw, sizeof(*fw));

	fw->fwname = strdup(fwname);
	fw->len = sb.st_size;
	fw->size = sb.st_size;
	fw->buf = buf;

	close(fd);
	return (1);
}

void
ath3k_fw_free(struct ath3k_firmware *fw)
{
	if (fw->fwname)
		free(fw->fwname);
	if (fw->buf)
		free(fw->buf);
	bzero(fw, sizeof(*fw));
}