}
}
}
- err("Not able to register with videodev");
+ }
+
+ /*
+ * This function is called from within easycap_usb_disconnect() and is
+ * protected by semaphores set and cleared by easycap_usb_disconnect().
+ * By this stage the device has already been physically unplugged,
+ * so peasycap->pusb_device is no longer valid.
+ */
+ static void easycap_delete(struct kref *pkref)
+ {
+ struct easycap *peasycap;
+
+ peasycap = container_of(pkref, struct easycap, kref);
+ if (!peasycap) {
+ SAM("ERROR: peasycap is NULL: cannot perform deletions\n");
+ return;
+ }
+
+ /* Free video urbs */
+ free_video_urbs(peasycap);
+
+ /* Free video isoc buffers */
+ free_isocbuffers(peasycap);
+
+ /* Free video field buffers */
+ free_fieldbuffers(peasycap);
+
+ /* Free video frame buffers */
+ free_framebuffers(peasycap);
+
+ /* Free audio urbs */
+ free_audio_urbs(peasycap);
+
+ /* Free audio isoc buffers */
+ free_audio_buffers(peasycap);
+
+ free_easycap(peasycap);
+
+ JOT(4, "ending.\n");
+ }
+
+ static const struct v4l2_file_operations v4l2_fops = {
+ .owner = THIS_MODULE,
+ .open = easycap_open_noinode,
+ .unlocked_ioctl = easycap_unlocked_ioctl,
+ .poll = easycap_poll,
+ .mmap = easycap_mmap,
+ };
+
+ static int easycap_register_video(struct easycap *peasycap)
+ {
+ /*
+ * FIXME: This is believed to be harmless,
+ * but may well be unnecessary or wrong.
+ */
+ peasycap->video_device.v4l2_dev = NULL;
+
+ strcpy(&peasycap->video_device.name[0], "easycapdc60");
+ peasycap->video_device.fops = &v4l2_fops;
+ peasycap->video_device.minor = -1;
+ peasycap->video_device.release = (void *)(&videodev_release);
+
+ video_set_drvdata(&(peasycap->video_device), (void *)peasycap);
+
+ if (0 != (video_register_device(&(peasycap->video_device),
+ VFL_TYPE_GRABBER, -1))) {
+ videodev_release(&(peasycap->video_device));
+ return -ENODEV;
+ }
+
+ peasycap->registered_video++;
+
+ SAM("registered with videodev: %i=minor\n",
+ peasycap->video_device.minor);
+ peasycap->minor = peasycap->video_device.minor;
+
+ return 0;
+ }
+
+ /*
+ * When the device is plugged, this function is called three times,
+ * one for each interface.
+ */
+ static int easycap_usb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+ {
+ struct usb_device *usbdev;
+ struct usb_host_interface *alt;
+ struct usb_endpoint_descriptor *ep;
+ struct usb_interface_descriptor *interface;
+ struct easycap *peasycap;
+ int i, j, rc;
+ u8 bInterfaceNumber;
+ u8 bInterfaceClass;
+ u8 bInterfaceSubClass;
+ int okalt[8], isokalt;
+ int okepn[8];
+ int okmps[8];
+ int maxpacketsize;
+
+ usbdev = interface_to_usbdev(intf);
+
+ alt = usb_altnum_to_altsetting(intf, 0);
+ if (!alt) {
+ SAY("ERROR: usb_host_interface not found\n");
+ return -EFAULT;
+ }
+
+ interface = &alt->desc;
+ if (!interface) {
+ SAY("ERROR: intf_descriptor is NULL\n");
+ return -EFAULT;
+ }
+
+ /* Get properties of probed interface */
+ bInterfaceNumber = interface->bInterfaceNumber;
+ bInterfaceClass = interface->bInterfaceClass;
+ bInterfaceSubClass = interface->bInterfaceSubClass;
+
+ JOT(4, "intf[%i]: num_altsetting=%i\n",
+ bInterfaceNumber, intf->num_altsetting);
+ JOT(4, "intf[%i]: cur_altsetting - altsetting=%li\n",
+ bInterfaceNumber,
+ (long int)(intf->cur_altsetting - intf->altsetting));
+ JOT(4, "intf[%i]: bInterfaceClass=0x%02X bInterfaceSubClass=0x%02X\n",
+ bInterfaceNumber, bInterfaceClass, bInterfaceSubClass);
+
+ /*
+ * A new struct easycap is always allocated when interface 0 is probed.
+ * It is not possible here to free any existing struct easycap.
+ * This should have been done by easycap_delete() when the device was
+ * physically unplugged.
+ * The allocated struct easycap is saved for later usage when
+ * interfaces 1 and 2 are probed.
+ */
+ if (0 == bInterfaceNumber) {
+ /*
+ * Alloc structure and save it in a free slot in
+ * easycapdc60_dongle array
+ */
+ peasycap = alloc_easycap(bInterfaceNumber);
+ if (!peasycap)
+ return -ENOMEM;
+
+ /* Perform basic struct initialization */
+ init_easycap(peasycap, usbdev, intf, bInterfaceNumber);
+
+ /* Dynamically fill in the available formats */
+ rc = easycap_video_fillin_formats();
+ if (0 > rc) {
+ SAM("ERROR: fillin_formats() rc = %i\n", rc);
+ return -EFAULT;
+ }
+ JOM(4, "%i formats available\n", rc);
+
+ /* Populate easycap.inputset[] */
+ rc = populate_inputset(peasycap);
+ if (rc < 0)
+ return rc;
+ JOM(4, "finished initialization\n");
+ } else {
+ peasycap = get_easycap(usbdev, bInterfaceNumber);
+ if (!peasycap)
+ return -ENODEV;
+ }
+
+ config_easycap(peasycap, bInterfaceNumber,
+ bInterfaceClass,
+ bInterfaceSubClass);
/*
* Investigate all altsettings. This is done in detail
JOM(4, "registered device instance: %s\n",
peasycap->v4l2_device.name);
- /*
- * FIXME: This is believed to be harmless,
- * but may well be unnecessary or wrong.
- */
- peasycap->video_device.v4l2_dev = NULL;
-
-
- strcpy(&peasycap->video_device.name[0], "easycapdc60");
- peasycap->video_device.fops = &v4l2_fops;
- peasycap->video_device.minor = -1;
- peasycap->video_device.release = (void *)(&videodev_release);
-
- video_set_drvdata(&(peasycap->video_device), (void *)peasycap);
-
- if (0 != (video_register_device(&(peasycap->video_device),
- VFL_TYPE_GRABBER, -1))) {
+ rc = easycap_register_video(peasycap);
- if (rc < 0)
++ if (rc < 0) {
+ dev_err(&intf->dev,
+ "Not able to register with videodev\n");
- videodev_release(&(peasycap->video_device));
return -ENODEV;
-
- peasycap->registered_video++;
- SAM("registered with videodev: %i=minor\n",
- peasycap->video_device.minor);
- peasycap->minor = peasycap->video_device.minor;
-
+ }
break;
}
/* 1: Audio control */
projects / kernel / kernel-generic.git / commitdiff