diff options
| author | Andiry Xu <andiry.xu@amd.com> | 2011-04-27 10:07:29 (GMT) |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-05-02 23:42:51 (GMT) |
| commit | a11496ebf37534177d67222285e8debed7a39788 (patch) | |
| tree | c51ab9eae801b4825c31e34e4108fe5bdb790f68 /drivers | |
| parent | 64b3c304bed25388fed48dbdc098dfcad7063d9c (diff) | |
| download | linux-a11496ebf37534177d67222285e8debed7a39788.tar.xz | |
xHCI: warm reset support
This patch adds warm reset support to xhci hub control.
It handles Set Port Feature(BH_PORT_RESET) and Clear Port Feature
(C_BH_PORT_RESET) request from usbcore.
Note warm reset is called BH reset some places in USB3.0 specification.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index ae1d24c..1ab7f2e 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -341,6 +341,10 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue, status = PORT_RC; port_change_bit = "reset"; break; + case USB_PORT_FEAT_C_BH_PORT_RESET: + status = PORT_WRC; + port_change_bit = "warm(BH) reset"; + break; case USB_PORT_FEAT_C_CONNECTION: status = PORT_CSC; port_change_bit = "connect"; @@ -557,6 +561,12 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, temp = xhci_readl(xhci, port_array[wIndex]); xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); break; + case USB_PORT_FEAT_BH_PORT_RESET: + temp |= PORT_WR; + xhci_writel(xhci, temp, port_array[wIndex]); + + temp = xhci_readl(xhci, port_array[wIndex]); + break; default: goto error; } @@ -625,6 +635,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, case USB_PORT_FEAT_C_SUSPEND: bus_state->port_c_suspend &= ~(1 << wIndex); case USB_PORT_FEAT_C_RESET: + case USB_PORT_FEAT_C_BH_PORT_RESET: case USB_PORT_FEAT_C_CONNECTION: case USB_PORT_FEAT_C_OVER_CURRENT: case USB_PORT_FEAT_C_ENABLE: |