cam: Allow time for CA to initialize

Some devices take some time to initialize, and until they are they
will error out when trying to get information about the CA device.

diff --git a/sys/dvb/camdevice.c b/sys/dvb/camdevice.c
index d38d625aead0d1d66a5b0ea28545d473e8d63054..0a160ceb17a71054aa58cbae5c028548a73a7942 100644 (file)
--- a/sys/dvb/camdevice.c
+++ b/sys/dvb/camdevice.c
@@ -104,6 +104,7 @@ cam_device_open (CamDevice * device, const char *filename)
   ca_caps_t ca_caps;
   int ret;
   int i;
+  int count = 10;
 
   g_return_val_if_fail (device != NULL, FALSE);
   g_return_val_if_fail (device->state == CAM_DEVICE_STATE_CLOSED, FALSE);
@@ -117,17 +118,31 @@ cam_device_open (CamDevice * device, const char *filename)
     return FALSE;
   }
 
+  GST_DEBUG ("Successfully opened device %s", filename);
+
   device->fd = ret;
 
   ret = ioctl (device->fd, CA_RESET);
-  sleep (1);
 
-  /* get the capabilities of the CA */
-  ret = ioctl (device->fd, CA_GET_CAP, &ca_caps);
-  if (ret == -1) {
-    GST_ERROR ("CA_GET_CAP ioctl failed: %s", strerror (errno));
-    reset_state (device);
-    return FALSE;
+  g_usleep (G_USEC_PER_SEC / 10);
+
+  while (TRUE) {
+    /* get the capabilities of the CA */
+    ret = ioctl (device->fd, CA_GET_CAP, &ca_caps);
+    if (ret == -1) {
+      GST_ERROR ("CA_GET_CAP ioctl failed: %s", strerror (errno));
+      reset_state (device);
+      return FALSE;
+    }
+    if (ca_caps.slot_num > 0)
+      break;
+    if (!count) {
+      GST_ERROR ("CA_GET_CAP succeeded but not slots");
+      reset_state (device);
+      return FALSE;
+    }
+    count--;
+    g_usleep (G_USEC_PER_SEC / 5);
   }
 
   device->tl = cam_tl_new (device->fd);