Klaus Schmidinger wrote:
At this point...
Apr 7 09:06:41 vdr vdr: [4862] ms: 3
Apr 7 09:06:41 vdr vdr: [4862] resetTime1: 0
Apr 7 09:06:41 vdr vdr: [4862] ms: 2
...the module status changed from 3 ("ready") to 2 ("present").
The module status is retrieved from the driver in cDvbCiAdapter::ModuleStatus():
eModuleStatus cDvbCiAdapter::ModuleStatus(int Slot)
{
ca_slot_info_t sinfo;
sinfo.num = Slot;
if (ioctl(fd, CA_GET_SLOT_INFO, &sinfo) != -1) {
if ((sinfo.flags & CA_CI_MODULE_READY) != 0)
return msReady;
else if ((sinfo.flags & CA_CI_MODULE_PRESENT) != 0)
return msPresent;
}
else
esyslog("ERROR: can't get info of CAM slot %d on device %d: %m", Slot, device->DeviceNumber());
return msNone;
}
So for some reason the sinfo.flags doesn't seem to have the CA_CI_MODULE_READY
flag set any longer.
Please take a look to the test code in attachment, provided by Christoph
Pfister. With it I got the following output:
root@vdr:/video/vdr/cam# ./test
0.000008: 3
0.000161: 0
0.014133: 1
1.694142: 3
And explanation:
After a reset CAM is "absent" for a very short time (<14ms == less than
a scheduler tick) and then it takes ~1.7s to become ready again. (The
intervall between reset and status query seems to be a bit bigger in vdr
- so we only see the 3-->1 change == 3-->2 in vdr numbers).
It's an endless loop: cam detection --> cam reset --> cam not
present/ready for a short while --> vdr thinks cam has been physically
removed --> cam detection --> cam reset etc.
Big thanks to Christoph for assistance.
Is it realistic to hope for a workaround/solution for this kind of CAMs
(Technotrend CX at my case)?
Regards,
AK
#include <fcntl.h>
#include <linux/dvb/ca.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <unistd.h>
int cam_status(int fd)
{
ca_slot_info_t info;
memset(&info, 0, sizeof(info));
info.num = 0;
if (ioctl(fd, CA_GET_SLOT_INFO, &info) != 0) {
printf("error: couldn't get slot info\n");
return -1;
}
return info.flags;
}
struct timeval start_time;
void print_status(int status)
{
struct timeval time;
gettimeofday(&time, NULL);
int dsec = time.tv_sec - start_time.tv_sec;
int dusec = time.tv_usec - start_time.tv_usec;
if (dusec < 0) {
dusec += 1000000;
dsec -= 1;
}
printf("%i.%06i: %i\n", dsec, dusec, status);
}
int main()
{
int fd = open("/dev/dvb/adapter0/ca0", O_RDWR);
if (fd < 0) {
printf("error: couldn't open ca handle\n");
return 1;
}
gettimeofday(&start_time, NULL);
int status = cam_status(fd);
print_status(status);
if (ioctl(fd, CA_RESET, (1 << 0)) != 0) {
printf("error: couldn't reset cam\n");
return 1;
}
int i;
for (i = 0; i < 200; ++i) {
int new_status = cam_status(fd);
if (status != new_status) {
status = new_status;
print_status(status);
}
usleep(10000);
}
return 0;
}
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