[U-Boot] [[PATCH v2 5/6] USB: ehci: Add a weak function for resetting devices

Dan Murphy
2013-07-10T20:05:08Z

Add a __weak function that can be overridden to reset devices
attached to an ehci devices after the FEAT_POWER has been submitted

Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/usb/host/ehci-hcd.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 706cf0c..fdd3994 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -616,6 +616,11 @@ __weak uint32_t *ehci_get_portsc_register(struct ehci_hcor *hcor, int port)
return (uint32_t *)&hcor->or_portsc[port];
}

+__weak void ehci_reset_attached_devices(int port)
+{
+ return;
+}
+
int
ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
int length, struct devrequest *req)
@@ -777,6 +782,7 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
reg |= EHCI_PS_PP;
ehci_writel(status_reg, reg);
}
+ ehci_reset_attached_devices(port);
break;
case USB_PORT_FEAT_RESET:
if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
@@ -794,6 +800,7 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
reg |= EHCI_PS_PR;
reg &= ~EHCI_PS_PE;
ehci_writel(status_reg, reg);
+
/*
* caller must wait, then call GetPortStatus
* usb 2.0 specification say 50 ms resets on
--
1.7.9.5