diff options
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index e8edeecf367..e478ccba037 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -2149,7 +2149,7 @@ static int em28xx_usb_probe(struct usb_interface *interface, struct usb_interface *uif; struct em28xx *dev = NULL; int retval = -ENODEV; - int i, nr, ifnum; + int i, nr, ifnum, isoc_pipe; udev = usb_get_dev(interface_to_usbdev(interface)); ifnum = interface->altsetting[0].desc.bInterfaceNumber; @@ -2176,19 +2176,29 @@ static int em28xx_usb_probe(struct usb_interface *interface, ifnum, interface->altsetting[0].desc.bInterfaceClass); - endpoint = &interface->cur_altsetting->endpoint[1].desc; + endpoint = &interface->cur_altsetting->endpoint[0].desc; /* check if the device has the iso in endpoint at the correct place */ - if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != - USB_ENDPOINT_XFER_ISOC) { - em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); - em28xx_devused &= ~(1<<nr); - return -ENODEV; - } - if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { - em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); - em28xx_devused &= ~(1<<nr); - return -ENODEV; + if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == + USB_ENDPOINT_XFER_ISOC && + (interface->altsetting[1].endpoint[0].desc.wMaxPacketSize == 940)) + { + /* It's a newer em2874/em2875 device */ + isoc_pipe = 0; + } else { + isoc_pipe = 1; + endpoint = &interface->cur_altsetting->endpoint[1].desc; + if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != + USB_ENDPOINT_XFER_ISOC) { + em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); + em28xx_devused &= ~(1<<nr); + return -ENODEV; + } + if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { + em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); + em28xx_devused &= ~(1<<nr); + return -ENODEV; + } } if (nr >= EM28XX_MAXBOARDS) { @@ -2239,7 +2249,7 @@ static int em28xx_usb_probe(struct usb_interface *interface, } for (i = 0; i < dev->num_alt ; i++) { - u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. + u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc. wMaxPacketSize); dev->alt_max_pkt_size[i] = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); |