On Mon, 6 May 2013, [ISO-8859-1] Aur�lien Leblond wrote:
> Hello all,
>
> I have two usb soundcards at home and my laptop has both EHCI and XHCI
> usb ports.
>
> The M-Audio Fast-Track Ultra (USB 2) is not recognized by ALSA when
> plugged on a USB 3 (XHCI) port on the kernel 3.9.
>
> I'm trying to figure out where the problem lies to report the issue to
> the proper team: is it with XHCI or with ALSA?
Neither one. The problem is in the device.
> In dmesg, this is what happens when the FTU is plugged:
> [ 107.461175] usb 3-1: new high-speed USB device number 3 using xhci_hcd
> [ 107.481695] usb 3-1: config 1 interface 3 altsetting 0 bulk
> endpoint 0x7 has invalid maxpacket 8
> [ 107.481705] usb 3-1: config 1 interface 3 altsetting 0 bulk
> endpoint 0x87 has invalid maxpacket 8
See those warnings? They indicate that the device has invalid entries
in its endpoint descriptors. The xHCI hardware can't cope with those
invalid entries.
> [ 107.483384] usb 3-1: New USB device found, idVendor=0763, idProduct=2080
> [ 107.483392] usb 3-1: New USB device strings: Mfr=1, Product=2,
> SerialNumber=0
> [ 107.483398] usb 3-1: Product: Fast Track Ultra
> [ 107.483403] usb 3-1: Manufacturer: M-Audio
> [ 107.483886] xhci_hcd 0000:04:00.0: ERROR: unexpected command
> completion code 0x11.
> [ 107.483899] usb 3-1: can't set config #1, error -22
This error is the result. It prevents the system from using the
device.
Now, the xhci-hcd driver ought to be smart enough to compensate for
mistakes like this (they are relatively common). Does the patch below
help?
Alan Stern
Index: usb-3.9/drivers/usb/host/xhci-mem.c
===================================================================
--- usb-3.9.orig/drivers/usb/host/xhci-mem.c
+++ usb-3.9/drivers/usb/host/xhci-mem.c
@@ -1423,15 +1423,17 @@ int xhci_endpoint_init(struct xhci_hcd *
ep_ctx->ep_info2 |= cpu_to_le32(xhci_get_endpoint_type(udev, ep));
/* Set the max packet size and max burst */
+ max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc));
+ max_burst = 0;
switch (udev->speed) {
case USB_SPEED_SUPER:
- max_packet = usb_endpoint_maxp(&ep->desc);
- ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet));
/* dig out max burst from ep companion desc */
- max_packet = ep->ss_ep_comp.bMaxBurst;
- ep_ctx->ep_info2 |= cpu_to_le32(MAX_BURST(max_packet));
+ max_burst = ep->ss_ep_comp.bMaxBurst;
break;
case USB_SPEED_HIGH:
+ /* Some devices get this wrong */
+ if (usb_endpoint_xfer_bulk(&ep->desc))
+ max_packet = 512;
/* bits 11:12 specify the number of additional transaction
* opportunities per microframe (USB 2.0, section 9.6.6)
*/
@@ -1439,17 +1441,16 @@ int xhci_endpoint_init(struct xhci_hcd *
usb_endpoint_xfer_int(&ep->desc)) {
max_burst = (usb_endpoint_maxp(&ep->desc)
& 0x1800) >> 11;
- ep_ctx->ep_info2 |= cpu_to_le32(MAX_BURST(max_burst));
}
- /* Fall through */
+ break;
case USB_SPEED_FULL:
case USB_SPEED_LOW:
- max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc));
- ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet));
break;
default:
BUG();
}
+ ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet) |
+ MAX_BURST(max_burst));
max_esit_payload = xhci_get_max_esit_payload(xhci, udev, ep);
ep_ctx->tx_info =
cpu_to_le32(MAX_ESIT_PAYLOAD_FOR_EP(max_esit_payload));
--
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