11.1Sjmcneill/* $NetBSD: firmload.c,v 1.1 2017/08/10 20:43:12 jmcneill Exp $ */ 21.1Sjmcneill 31.1Sjmcneill/*- 41.1Sjmcneill * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 51.1Sjmcneill * All rights reserved. 61.1Sjmcneill * 71.1Sjmcneill * Redistribution and use in source and binary forms, with or without 81.1Sjmcneill * modification, are permitted provided that the following conditions 91.1Sjmcneill * are met: 101.1Sjmcneill * 1. Redistributions of source code must retain the above copyright 111.1Sjmcneill * notice, this list of conditions and the following disclaimer. 121.1Sjmcneill * 2. Redistributions in binary form must reproduce the above copyright 131.1Sjmcneill * notice, this list of conditions and the following disclaimer in the 141.1Sjmcneill * documentation and/or other materials provided with the distribution. 151.1Sjmcneill * 161.1Sjmcneill * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 171.1Sjmcneill * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 181.1Sjmcneill * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 191.1Sjmcneill * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 201.1Sjmcneill * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 211.1Sjmcneill * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 221.1Sjmcneill * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 231.1Sjmcneill * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 241.1Sjmcneill * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 251.1Sjmcneill * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 261.1Sjmcneill * SUCH DAMAGE. 271.1Sjmcneill */ 281.1Sjmcneill 291.1Sjmcneill#include <sys/param.h> 301.1Sjmcneill#include <sys/sysctl.h> 311.1Sjmcneill#include <fcntl.h> 321.1Sjmcneill#include <stdio.h> 331.1Sjmcneill#include <stdlib.h> 341.1Sjmcneill#include <string.h> 351.1Sjmcneill 361.1Sjmcneill#include "firmload.h" 371.1Sjmcneill 381.1Sjmcneill#define HW_FIRMWARE_PATH "hw.firmware.path" 391.1Sjmcneill#define HW_FIRMWARE_PATH_DELIM ":" 401.1Sjmcneill 411.1Sjmcneillstatic int 421.1Sjmcneillfirmware_search(char *paths, const char *drvname, const char *imgname) 431.1Sjmcneill{ 441.1Sjmcneill char *p, *f; 451.1Sjmcneill const int debug = getenv("FIRMWARE_DEBUG") != NULL; 461.1Sjmcneill int fd; 471.1Sjmcneill 481.1Sjmcneill p = strtok(paths, HW_FIRMWARE_PATH_DELIM); 491.1Sjmcneill while (p) { 501.1Sjmcneill if (asprintf(&f, "%s/%s/%s", p, drvname, imgname) == -1) 511.1Sjmcneill return -1; 521.1Sjmcneill if (debug) 531.1Sjmcneill printf("%s: trying %s...\n", __func__, f); 541.1Sjmcneill fd = open(f, O_RDONLY); 551.1Sjmcneill free(f); 561.1Sjmcneill if (fd != -1) { 571.1Sjmcneill if (debug) 581.1Sjmcneill printf("%s: using image at %s\n", __func__, f); 591.1Sjmcneill return fd; 601.1Sjmcneill } 611.1Sjmcneill p = strtok(NULL, HW_FIRMWARE_PATH_DELIM); 621.1Sjmcneill } 631.1Sjmcneill 641.1Sjmcneill /* Not found */ 651.1Sjmcneill return -1; 661.1Sjmcneill} 671.1Sjmcneill 681.1Sjmcneillint 691.1Sjmcneillfirmware_open(const char *drvname, const char *imgname) 701.1Sjmcneill{ 711.1Sjmcneill size_t len; 721.1Sjmcneill char *paths; 731.1Sjmcneill int fd; 741.1Sjmcneill 751.1Sjmcneill paths = asysctlbyname(HW_FIRMWARE_PATH, &len); 761.1Sjmcneill if (paths == NULL) 771.1Sjmcneill return -1; 781.1Sjmcneill 791.1Sjmcneill fd = firmware_search(paths, drvname, imgname); 801.1Sjmcneill 811.1Sjmcneill free(paths); 821.1Sjmcneill 831.1Sjmcneill return fd; 841.1Sjmcneill} 85