mirror of
https://github.com/team-infusion-developers/android_hardware_samsung.git
synced 2024-10-31 23:37:35 +00:00
b0d8610bdb
* Try to read the hardware revision from the bootloader before parsing /proc/cpuinfo * Set more properties to catch all recent device needs as well * Introduce a property to let other services (cbd) know they can start Change-Id: I50d8ec37921ec2559bdd7fe852d830f10fe1c12e
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* Copyright (C) 2015-2017 Christopher N. Hesse <raymanfx@gmail.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 "modemloader"
|
|
#define LOG_NDEBUG 0
|
|
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <sys/un.h>
|
|
|
|
#include <cutils/properties.h>
|
|
#include <cutils/log.h>
|
|
|
|
void parse_hardware_revision(unsigned int *revision)
|
|
{
|
|
const char *cpuinfo = "/proc/cpuinfo";
|
|
char *data = NULL;
|
|
size_t len = 0, limit = 1024;
|
|
int fd, n;
|
|
char *x, *rev;
|
|
|
|
fd = open(cpuinfo, O_RDONLY);
|
|
if (fd < 0) return;
|
|
|
|
for (;;) {
|
|
x = (char*)realloc(data, limit);
|
|
if (!x) {
|
|
ALOGE("Failed to allocate memory to read %s\n", cpuinfo);
|
|
goto done;
|
|
}
|
|
data = x;
|
|
|
|
n = read(fd, data + len, limit - len);
|
|
if (n < 0) {
|
|
ALOGE("Failed reading %s: %s (%d)\n", cpuinfo, strerror(errno), errno);
|
|
goto done;
|
|
}
|
|
len += n;
|
|
|
|
if (len < limit)
|
|
break;
|
|
|
|
/* We filled the buffer, so increase size and loop to read more */
|
|
limit *= 2;
|
|
}
|
|
|
|
data[len] = 0;
|
|
rev = strstr(data, "\nRevision");
|
|
|
|
if (rev) {
|
|
x = strstr(rev, ": ");
|
|
if (x) {
|
|
*revision = strtoul(x + 2, 0, 16);
|
|
}
|
|
}
|
|
|
|
done:
|
|
close(fd);
|
|
free(data);
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
unsigned int revision;
|
|
char hardware_revision[PROP_VALUE_MAX];
|
|
const char *properties[] = {"hw.revision", "ro.cbd.dt_revision", "ril.cbd.dt_revision"};
|
|
|
|
// try to read the revision from the kernel cmdline
|
|
revision = property_get_int32("ro.boot.hw_rev", 0);
|
|
|
|
// if the property was not exported, try to parse /proc/cpuinfo
|
|
if (revision == 0) {
|
|
parse_hardware_revision(&revision);
|
|
}
|
|
|
|
snprintf(hardware_revision, PROP_VALUE_MAX, "%d", revision);
|
|
|
|
// set all the properties
|
|
const int array_length = sizeof(properties) / sizeof(properties[0]);
|
|
for (int i = 0; i < array_length; i++) {
|
|
property_set(properties[i], hardware_revision);
|
|
}
|
|
|
|
// indicate that we are done
|
|
property_set("ro.modemloader.done", "1");
|
|
|
|
return 0;
|
|
}
|