Date: Fri, 21 Jul 2006 23:52:04 -0500 From: Robert Nilsson <robert@nilssonstudios.com> To: freebsd-usb@freebsd.org Subject: [PATCH] libusb usb_clear_halt implementation Message-ID: <61566738-B90E-4C80-B596-50912DC9872B@nilssonstudios.com>
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In order to get a device working correctly after a program restart I had to use this function. It's a pretty simple change. --- libusb-0.1.12/bsd.c Fri Mar 3 20:52:46 2006 +++ libusb-0.1.12.rob/bsd.c Fri Jul 21 22:47:55 2006 @@ -623,9 +623,21 @@ int usb_clear_halt(usb_dev_handle *dev, unsigned int ep) { - /* Not yet done, because I haven't needed it. */ + int ret; + struct usb_ctl_request ctl_req; - USB_ERROR_STR(-ENOSYS, "usb_clear_halt called, unimplemented on BSD"); + ctl_req.ucr_addr = 0; // Not used for this type of request + ctl_req.ucr_request.bmRequestType = UT_WRITE_ENDPOINT; + ctl_req.ucr_request.bRequest = UR_CLEAR_FEATURE; + USETW(ctl_req.ucr_request.wValue, UF_ENDPOINT_HALT); + USETW(ctl_req.ucr_request.wIndex, ep); + USETW(ctl_req.ucr_request.wLength, 0); + ctl_req.ucr_flags = 0; + + if ((ret = ioctl(dev->fd, USB_DO_REQUEST, &ctl_req)) < 0) + USB_ERROR_STR(-errno, "clear_halt: failed for %d", ep); + + return ret; } int usb_reset(usb_dev_handle *dev) Rob.
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