diff options
Diffstat (limited to 'drivers/media/radio/si470x/radio-si470x-usb.c')
| -rw-r--r-- | drivers/media/radio/si470x/radio-si470x-usb.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/media/radio/si470x/radio-si470x-usb.c b/drivers/media/radio/si470x/radio-si470x-usb.c index cd74025517e5..07ef40595efd 100644 --- a/drivers/media/radio/si470x/radio-si470x-usb.c +++ b/drivers/media/radio/si470x/radio-si470x-usb.c @@ -635,6 +635,30 @@ static int si470x_usb_driver_probe(struct usb_interface *intf, } radio->v4l2_dev.release = si470x_usb_release; + + /* + * The si470x SiLabs reference design uses the same USB IDs as + * 'Thanko's Raremono' si4734 based receiver. So check here which we + * have: attempt to read the device ID from the si470x: the lower 12 + * bits should be 0x0242 for the si470x. + * + * We use this check to determine which device we are dealing with. + */ + if (id->idVendor == 0x10c4 && id->idProduct == 0x818a) { + retval = usb_control_msg(radio->usbdev, + usb_rcvctrlpipe(radio->usbdev, 0), + HID_REQ_GET_REPORT, + USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, + 1, 2, + radio->usb_buf, 3, 500); + if (retval != 3 || + (get_unaligned_be16(&radio->usb_buf[1]) & 0xfff) != 0x0242) { + dev_info(&intf->dev, "this is not a si470x device.\n"); + retval = -ENODEV; + goto err_urb; + } + } + retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev); if (retval < 0) { dev_err(&intf->dev, "couldn't register v4l2_device\n"); |