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| author | Michael Brown | 2015-04-13 15:08:09 +0200 |
|---|---|---|
| committer | Michael Brown | 2015-04-13 15:37:15 +0200 |
| commit | 867e3ee47587592d30f6f85b72b061b671f830df (patch) | |
| tree | 2e9e4a5a3503fba2272c3d007e53734bc744d715 /src/drivers/usb/xhci.c | |
| parent | [build] Rewrite parserom.pl to support multiple source files (diff) | |
| download | ipxe-867e3ee47587592d30f6f85b72b061b671f830df.tar.gz ipxe-867e3ee47587592d30f6f85b72b061b671f830df.tar.xz ipxe-867e3ee47587592d30f6f85b72b061b671f830df.zip | |
[xhci] Always reset root hub ports
In theory USB3 ports do not require a reset to enable the port.
Experimentation shows that this is sometimes required, particularly
when rerouting ports from EHCI to xHCI and switching speeds.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/drivers/usb/xhci.c')
| -rw-r--r-- | src/drivers/usb/xhci.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/src/drivers/usb/xhci.c b/src/drivers/usb/xhci.c index b6ce7444..523a1c0b 100644 --- a/src/drivers/usb/xhci.c +++ b/src/drivers/usb/xhci.c @@ -2954,13 +2954,11 @@ static int xhci_root_enable ( struct usb_hub *hub, struct usb_port *port ) { uint32_t portsc; unsigned int i; - /* Reset port if applicable */ - if ( port->protocol < USB_PROTO_3_0 ) { - portsc = readl ( xhci->op + XHCI_OP_PORTSC ( port->address ) ); - portsc &= XHCI_PORTSC_PRESERVE; - portsc |= XHCI_PORTSC_PR; - writel ( portsc, xhci->op + XHCI_OP_PORTSC ( port->address ) ); - } + /* Reset port */ + portsc = readl ( xhci->op + XHCI_OP_PORTSC ( port->address ) ); + portsc &= XHCI_PORTSC_PRESERVE; + portsc |= XHCI_PORTSC_PR; + writel ( portsc, xhci->op + XHCI_OP_PORTSC ( port->address ) ); /* Wait for port to become enabled */ for ( i = 0 ; i < XHCI_PORT_RESET_MAX_WAIT_MS ; i++ ) { |