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Try harder to get initial descriptor. Do a port reset now and then 

in the retry loop.
This commit is contained in:
augustss 2004-01-05 13:32:23 +00:00
parent 4d6e985752
commit 7cdc2658bb
1 changed files with 6 additions and 3 deletions
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9
sys/dev/usb/usb_subr.c
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@ -1,4 +1,4 @@
/* $NetBSD: usb_subr.c,v 1.106 2003/09/23 21:44:42 mycroft Exp $ */
/* $NetBSD: usb_subr.c,v 1.107 2004/01/05 13:32:23 augustss Exp $ */
/* $FreeBSD: src/sys/dev/usb/usb_subr.c,v 1.18 1999/11/17 22:33:47 n_hibma Exp $ */
/*
@ -39,7 +39,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: usb_subr.c,v 1.106 2003/09/23 21:44:42 mycroft Exp $");
__KERNEL_RCSID(0, "$NetBSD: usb_subr.c,v 1.107 2004/01/05 13:32:23 augustss Exp $");
#include "opt_usbverbose.h"
@ -980,6 +980,7 @@ usbd_new_device(device_ptr_t parent, usbd_bus_handle bus, int depth,
usbd_device_handle dev;
struct usbd_device *hub;
usb_device_descriptor_t *dd;
usb_port_status_t ps;
usbd_status err;
int addr;
int i;
@ -1036,12 +1037,14 @@ usbd_new_device(device_ptr_t parent, usbd_bus_handle bus, int depth,
up->device = dev;
dd = &dev->ddesc;
/* Try a few times in case the device is slow (i.e. outside specs.) */
for (i = 0; i < 3; i++) {
for (i = 0; i < 10; i++) {
/* Get the first 8 bytes of the device descriptor. */
err = usbd_get_desc(dev, UDESC_DEVICE, 0, USB_MAX_IPACKET, dd);
if (!err)
break;
usbd_delay_ms(dev, 200);
if ((i & 3) == 3)
usbd_reset_port(up->parent, port, &ps);
}
if (err) {
DPRINTFN(-1, ("usbd_new_device: addr=%d, getting first desc "