Commit f0d7f273 authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman
Browse files

USB: EHCI hooks for high speed electrical tests 



EHCI hooks for high speed electrical tests of the root hub ports.

The expectation is that a usermode program actually triggers the test,
making the same control request it would make for an external hub.
Tests for peripheral upstream ports would issue a different request.
In all cases, the hardware needs re-initialization before it could
be used "normally" again (e.g. unplug/replug, rmmod/modprobe).

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 1f26e28d

drivers/usb/host/ehci-hub.c

+19 −0
Original line number Diff line number Diff line
@@ -319,6 +319,7 @@ static int ehci_hub_control ( 
	u32		temp, status;

	unsigned long	flags;

	int		retval = 0;

	unsigned	selector;



	/*

	 * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
@@ -506,6 +507,8 @@ static int ehci_hub_control ( 
		}

		break;

	case SetPortFeature:

		selector = wIndex >> 8;

		wIndex &= 0xff;

		if (!wIndex || wIndex > ports)

			goto error;

		wIndex--;
@@ -559,6 +562,22 @@ static int ehci_hub_control ( 
			}

			writel (temp, &ehci->regs->port_status [wIndex]);

			break;



		/* For downstream facing ports (these):  one hub port is put

		 * into test mode according to USB2 11.24.2.13, then the hub

		 * must be reset (which for root hub now means rmmod+modprobe,

		 * or else system reboot).  See EHCI 2.3.9 and 4.14 for info

		 * about the EHCI-specific stuff.

		 */

		case USB_PORT_FEAT_TEST:

			if (!selector || selector > 5)

				goto error;

			ehci_quiesce(ehci);

			ehci_halt(ehci);

			temp |= selector << 16;

			writel (temp, &ehci->regs->port_status [wIndex]);

			break;



		default:

			goto error;

		}