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hardware_samsung/macloader/macloader.c

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/*
* Copyright (C) 2012, The CyanogenMod Project
* Daniel Hillenbrand <codeworkx@cyanogenmod.com>
* Marco Hillenbrand <marco.hillenbrand@googlemail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "macloader"
#define LOG_NDEBUG 0
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <pwd.h>
#include <cutils/log.h>
#ifndef WIFI_DRIVER_NVRAM_PATH
#define WIFI_DRIVER_NVRAM_PATH NULL
#endif
#ifndef WIFI_DRIVER_NVRAM_PATH_PARAM
#define WIFI_DRIVER_NVRAM_PATH_PARAM "/sys/module/wlan/parameters/nvram_path"
#endif
#define MACADDR_PATH "/efs/wifi/.mac.info"
#define CID_PATH "/data/.cid.info"
enum Type {
NONE,
MURATA,
SEMCOSH,
SEMCOVE,
SEMCO3RD,
SEMCO,
WISOL
};
static int wifi_change_nvram_calibration(const char *nvram_file,
const char *type)
{
int len;
int fd = -1;
int ret = 0;
struct stat sb;
char nvram_str[1024] = { 0 };
if (nvram_file == NULL || type == NULL) {
return -1;
}
ret = stat(nvram_file, &sb);
if (ret != 0) {
ALOGE("Failed to check for NVRAM calibration file '%s' - error: %s",
nvram_file,
strerror(errno));
return -1;
}
ALOGD("Using NVRAM calibration file: %s\n", nvram_file);
fd = TEMP_FAILURE_RETRY(open(WIFI_DRIVER_NVRAM_PATH_PARAM, O_WRONLY));
if (fd < 0) {
ALOGE("Failed to open wifi nvram config path %s - error: %s",
WIFI_DRIVER_NVRAM_PATH_PARAM, strerror(errno));
return -1;
}
len = strlen(nvram_file) + 1;
if (TEMP_FAILURE_RETRY(write(fd, nvram_file, len)) != len) {
ALOGE("Failed to write to wifi config path %s - error: %s",
WIFI_DRIVER_NVRAM_PATH_PARAM, strerror(errno));
ret = -1;
goto out;
}
snprintf(nvram_str, sizeof(nvram_str), "%s_%s",
nvram_file, type);
ALOGD("Changing NVRAM calibration file for %s chipset\n", type);
ret = stat(nvram_str, &sb);
if (ret != 0) {
ALOGW("NVRAM calibration file '%s' doesn't exist", nvram_str);
/*
* We were able to write the default calibration file. So
* continue here without returning an error.
*/
ret = 0;
goto out;
}
len = strlen(nvram_str) + 1;
if (TEMP_FAILURE_RETRY(write(fd, nvram_str, len)) != len) {
ALOGW("Failed to write to wifi config path %s - error: %s",
WIFI_DRIVER_NVRAM_PATH_PARAM, strerror(errno));
/*
* We were able to write the default calibration file. So
* continue here without returning an error.
*/
ret = 0;
goto out;
}
ALOGD("NVRAM calibration file set to '%s'\n", nvram_str);
ret = 0;
out:
if (fd != -1) {
close(fd);
}
return ret;
}
int main() {
FILE* file;
FILE* cidfile;
char* str;
char mac_addr_half[9];
int ret = -1;
int amode;
enum Type type = NONE;
/* open mac addr file */
file = fopen(MACADDR_PATH, "r");
if (file == 0) {
fprintf(stderr, "open(%s) failed\n", MACADDR_PATH);
ALOGE("Can't open %s\n", MACADDR_PATH);
return -1;
}
/* get and compare mac addr */
str = fgets(mac_addr_half, 9, file);
fclose(file);
if (str == 0) {
fprintf(stderr, "fgets() from file %s failed\n", MACADDR_PATH);
ALOGE("Can't read from %s\n", MACADDR_PATH);
return -1;
}
/* murata
ref: http://hwaddress.com/?q=ACT */
if (strncasecmp(mac_addr_half, "00:0e:6d", 9) == 0 ||
strncasecmp(mac_addr_half, "00:13:e0", 9) == 0 ||
strncasecmp(mac_addr_half, "00:21:e8", 9) == 0 ||
strncasecmp(mac_addr_half, "00:26:e8", 9) == 0 ||
strncasecmp(mac_addr_half, "00:37:6d", 9) == 0 ||
strncasecmp(mac_addr_half, "00:60:57", 9) == 0 ||
strncasecmp(mac_addr_half, "04:46:65", 9) == 0 ||
strncasecmp(mac_addr_half, "10:5f:06", 9) == 0 ||
strncasecmp(mac_addr_half, "10:a5:d0", 9) == 0 ||
strncasecmp(mac_addr_half, "1c:99:4c", 9) == 0 ||
strncasecmp(mac_addr_half, "14:7d:c5", 9) == 0 ||
strncasecmp(mac_addr_half, "20:02:af", 9) == 0 ||
strncasecmp(mac_addr_half, "40:f3:08", 9) == 0 ||
strncasecmp(mac_addr_half, "44:a7:cf", 9) == 0 ||
strncasecmp(mac_addr_half, "5c:da:d4", 9) == 0 ||
strncasecmp(mac_addr_half, "5c:f8:a1", 9) == 0 ||
strncasecmp(mac_addr_half, "78:4b:87", 9) == 0 ||
strncasecmp(mac_addr_half, "60:21:c0", 9) == 0 ||
strncasecmp(mac_addr_half, "88:30:8a", 9) == 0 ||
strncasecmp(mac_addr_half, "f0:27:65", 9) == 0 ||
strncasecmp(mac_addr_half, "fc:c2:de", 9) == 0) {
type = MURATA;
}
/* semcosh */
if (strncasecmp(mac_addr_half, "34:23:ba", 9) == 0 ||
strncasecmp(mac_addr_half, "38:aa:3c", 9) == 0 ||
strncasecmp(mac_addr_half, "5c:0a:5b", 9) == 0 ||
strncasecmp(mac_addr_half, "88:32:9b", 9) == 0 ||
strncasecmp(mac_addr_half, "90:18:7c", 9) == 0 ||
strncasecmp(mac_addr_half, "cc:3a:61", 9) == 0) {
type = SEMCOSH;
}
/* semco3rd */
if (strncasecmp(mac_addr_half, "f4:09:d8", 9) == 0) {
type = SEMCO3RD;
}
/* semco */
if (strncasecmp(mac_addr_half, "c0:bd:d1", 9) == 0 ||
strncasecmp(mac_addr_half, "51:f6:6b", 9) == 0) {
type = SEMCO;
}
/* wisol */
if (strncasecmp(mac_addr_half, "48:5A:3F", 9) == 0) {
type = WISOL;
}
if (type != NONE) {
const char *nvram_file;
const char *type_str;
struct passwd *pwd;
int fd;
/* open cid file */
cidfile = fopen(CID_PATH, "w");
if(cidfile == 0) {
fprintf(stderr, "open(%s) failed\n", CID_PATH);
ALOGE("Can't open %s\n", CID_PATH);
return -1;
}
switch(type) {
case NONE:
return -1;
case MURATA:
type_str = "murata";
break;
case SEMCOSH:
type_str = "semcosh";
break;
case SEMCOVE:
type_str = "semcove";
break;
case SEMCO3RD:
type_str = "semco3rd";
break;
case SEMCO:
type_str = "semco";
break;
case WISOL:
type_str = "wisol";
break;
}
ALOGI("Settting wifi type to %s in %s\n", type_str, CID_PATH);
ret = fputs(type_str, cidfile);
if (ret != 0) {
ALOGE("Can't write to %s\n", CID_PATH);
return 1;
}
/* Change permissions of cid file */
ALOGD("Change permissions of %s\n", CID_PATH);
fd = fileno(cidfile);
amode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
ret = fchmod(fd, amode);
if (ret != 0) {
fclose(cidfile);
ALOGE("Can't set permissions on %s - %s\n",
CID_PATH, strerror(errno));
return 1;
}
pwd = getpwnam("system");
if (pwd == NULL) {
fclose(cidfile);
ALOGE("Failed to find 'system' user - %s\n",
strerror(errno));
return 1;
}
ret = fchown(fd, pwd->pw_uid, pwd->pw_gid);
fclose(cidfile);
if (ret != 0) {
ALOGE("Failed to change owner of %s - %s\n",
CID_PATH, strerror(errno));
return 1;
}
nvram_file = WIFI_DRIVER_NVRAM_PATH;
if (nvram_file != NULL) {
ret = wifi_change_nvram_calibration(nvram_file, type_str);
if (ret != 0) {
return 1;
}
}
} else {
/* delete cid file if no specific type */
ALOGD("Deleting file %s\n", CID_PATH);
remove(CID_PATH);
}
return 0;
}