diff options
| author | David Brownell <david-b@pacbell.net> | 2006-11-17 10:56:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-12-02 01:23:36 +0300 |
| commit | f0d7f27351058284f62ab4848909373c2d1f5ce8 (patch) | |
| tree | 8ccedd0ebf58ff3439750534f56eff94cc97ab2a /drivers | |
| parent | 1f26e28d3e32339ca683f087cd55a70e2befc333 (diff) | |
| download | linux-f0d7f27351058284f62ab4848909373c2d1f5ce8.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 1b20722c102b..7c170a29f959 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -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; } |