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: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -319,6 +319,7 @@ static int ehci_hub_control (
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u32 temp, status;
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unsigned long flags;
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int retval = 0;
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unsigned selector;
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/*
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* FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
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@ -506,6 +507,8 @@ static int ehci_hub_control (
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}
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break;
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case SetPortFeature:
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selector = wIndex >> 8;
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wIndex &= 0xff;
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if (!wIndex || wIndex > ports)
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goto error;
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wIndex--;
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@ -559,6 +562,22 @@ static int ehci_hub_control (
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}
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writel (temp, &ehci->regs->port_status [wIndex]);
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break;
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/* For downstream facing ports (these): one hub port is put
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* into test mode according to USB2 11.24.2.13, then the hub
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* must be reset (which for root hub now means rmmod+modprobe,
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* or else system reboot). See EHCI 2.3.9 and 4.14 for info
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* about the EHCI-specific stuff.
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*/
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case USB_PORT_FEAT_TEST:
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if (!selector || selector > 5)
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goto error;
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ehci_quiesce(ehci);
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ehci_halt(ehci);
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temp |= selector << 16;
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writel (temp, &ehci->regs->port_status [wIndex]);
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break;
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default:
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goto error;
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}
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