Introduce start_hnp callback function for HCD to receive notification
from EHCI core that HNP enabled port is suspended. HCD may initiate
HNP or notify the same to OTG via otg_start_hnp().
This patch is inspired by "USB: Hook start_hnp into ohci struct"
(e8b24450).
Signed-off-by: Pavankumar Kondeti <pkondeti@xxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-hub.c | 11 +++++++++++
drivers/usb/host/ehci.h | 2 ++
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 796ea0c..65bf104 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -1018,6 +1018,17 @@ static int ehci_hub_control (
|| (temp & PORT_RESET) != 0)
goto error;
+#ifdef CONFIG_USB_OTG
+ if (hcd->self.otg_port == (wIndex + 1) &&
+ hcd->self.b_hnp_enable &&
+ ehci->start_hnp) {
+ ehci_writel(ehci, temp | PORT_SUSPEND,
+ status_reg);
+ set_bit(wIndex, &ehci->suspended_ports);
+ ehci->start_hnp(ehci);
+ break;
+ }
+#endif
/* After above check the port must be connected.
* Set appropriate bit thus could put phy into low power
* mode if we have hostpc feature
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index fd1c53d..a4989f2 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -122,6 +122,8 @@ struct ehci_hcd { /* one per controller */
ktime_t last_periodic_enable;
u32 command;
+ void (*start_hnp)(struct ehci_hcd *ehci);
+
/* SILICON QUIRKS */
unsigned no_selective_suspend:1;
unsigned has_fsl_port_bug:1; /* FreeScale */
--
1.7.1
--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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