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

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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10
ChangeLog
View File

@ -1,3 +1,13 @@
2013-01-02 Joerg Wunsch <j.gnu@uriah.heep.sax.de>
* usb_libusb.c (usbdev_open): Downgrade the max transfer size for
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)
2013-01-02 Joerg Wunsch <j.gnu@uriah.heep.sax.de>
* ChangeLog: annual ChangeLog rotation time

30
jtag3.c
View File

@ -701,6 +701,36 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
unsigned char cmd[4], *resp, b;
int status;
/*
* At least, as of firmware 2.12, the JTAGICE3 doesn't handle
* splitting packets correctly. On a large transfer, the first
* split packets are correct, but remaining packets contain just
* garbage.
*
* We move the check here so in case future firmware versions fix
* this, the check below can be made dependended on the actual
* firmware level. Retrieving the firmware version can always be
* accomplished with USB 1.1 (64 byte max) packets.
*
* Allow to override the check by -F (so users could try on newer
* firmware), but warn loudly.
*/
if (jtag3_getparm(pgm, SCOPE_GENERAL, 0, PARM3_FW_MAJOR, parm, 2) < 0)
return -1;
if (pgm->fd.usb.max_xfer < USBDEV_MAX_XFER_3) {
fprintf(stderr,
"%s: the JTAGICE3's firmware %d.%d is broken on USB 1.1 connections, sorry\n",
progname, parm[0], parm[1]);
if (ovsigck) {
fprintf(stderr,
"%s: forced to continue by option -F; THIS PUTS THE DEVICE'S DATA INTEGRITY AT RISK!\n",
progname);
} else {
serial_close(&pgm->fd);
return -1;
}
}
if (pgm->flag & PGM_FL_IS_DW) {
ifname = "debugWire";
if (p->flags & AVRPART_HAS_DW)

16
usb_libusb.c
View File

@ -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;
}
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