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* usb_libusb.c (usbdev_open): Downgrade the max transfer size for

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the main data endpoints when being forced so by the USB; this can
happen when attaching the JTAGICE3 to a USB 1.1 connection
* jtag3.c (jtag3_initialize): When detecting a downgraded max
transfer size on the JTAGICE3 (presumably, due to being connected
to USB 1.1 only), bail out as its firmware cannot properly handle
this (by now)



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1129 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
joerg_wunsch
2013-01-02 10:16:37 +00:00
parent ef0ee7525f
commit ac8b2858ad
3 changed files with 56 additions and 0 deletions
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16
usb_libusb.c
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@@ -230,6 +230,22 @@ static int usbdev_open(char * port, long baud, union filedescriptor *fd)
fd->usb.rep = USBDEV_BULK_EP_READ_MKII;
}
}
for (i = 0; i < dev->config[0].interface[0].altsetting[0].bNumEndpoints; i++)
{
if ((dev->config[0].interface[0].altsetting[0].endpoint[i].bEndpointAddress == fd->usb.rep ||
dev->config[0].interface[0].altsetting[0].endpoint[i].bEndpointAddress == fd->usb.wep) &&
dev->config[0].interface[0].altsetting[0].endpoint[i].wMaxPacketSize < fd->usb.max_xfer)
{
if (verbose != 0)
fprintf(stderr,
"%s: max packet size expected %d, but found %d due to EP 0x%02x's wMaxPacketSize\n",
progname,
fd->usb.max_xfer,
dev->config[0].interface[0].altsetting[0].endpoint[i].wMaxPacketSize,
dev->config[0].interface[0].altsetting[0].endpoint[i].bEndpointAddress);
fd->usb.max_xfer = dev->config[0].interface[0].altsetting[0].endpoint[i].wMaxPacketSize;
}
}
return 0;
}
trynext: