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path: root/drivers/media/video/em28xx/em28xx-video.c
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Diffstat (limited to 'drivers/media/video/em28xx/em28xx-video.c')
-rw-r--r--drivers/media/video/em28xx/em28xx-video.c36
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);