@@ -614,6 +614,19 @@ static int hub_ext_port_status(struct usb_hub *hub, int port1, int type,
ret = 0;
}
mutex_unlock(&hub->status_mutex);
+
+ if (!ret) {
+ struct usb_device *hdev = hub->hdev;
+
+ if (hdev && !hdev->parent) {
+ struct usb_hcd *hcd = bus_to_hcd(hdev->bus);
+
+ if (hcd->usb_phy)
+ usb_phy_notify_port_status(hcd->usb_phy,
+ port1 - 1, *status, *change);
+ }
+ }
+
return ret;
}
@@ -144,6 +144,10 @@ struct usb_phy {
*/
int (*set_wakeup)(struct usb_phy *x, bool enabled);
+ /* notify phy port status change */
+ int (*notify_port_status)(struct usb_phy *x, int port,
+ u16 portstatus, u16 portchange);
+
/* notify phy connect status change */
int (*notify_connect)(struct usb_phy *x,
enum usb_device_speed speed);
@@ -316,6 +320,15 @@ usb_phy_set_wakeup(struct usb_phy *x, bool enabled)
return 0;
}
+static inline int
+usb_phy_notify_port_status(struct usb_phy *x, int port, u16 portstatus, u16 portchange)
+{
+ if (x && x->notify_port_status)
+ return x->notify_port_status(x, port, portstatus, portchange);
+ else
+ return 0;
+}
+
static inline int
usb_phy_notify_connect(struct usb_phy *x, enum usb_device_speed speed)
{
In Realtek SoC, the parameter of usb phy is designed to can dynamic tuning base on port status. Therefore, add a notify callback of phy driver when usb port status change. The Realtek phy driver is designed to dynamically adjust disconnection level and calibrate phy parameters. When the device connected bit changes and when the disconnected bit changes, do port status change notification: Check if portstatus is USB_PORT_STAT_CONNECTION and portchange is USB_PORT_STAT_C_CONNECTION. 1. The device is connected, the driver lowers the disconnection level and calibrates the phy parameters. 2. The device disconnects, the driver increases the disconnect level and calibrates the phy parameters. When controller to notify connect that device is already ready. If we adjust the disconnection level in notify_connect, the disconnect may have been triggered at this stage. So we need to change that as early as possible. Therefore, we add an api to notify phy the port status changes. Signed-off-by: Stanley Chang <stanley_chang@realtek.com> --- v3 to v4 change: Fix the warning for checkpatch with strict. v2 to v3 change: Add more comments about the reason for adding this api v1 to v2 change: No change --- drivers/usb/core/hub.c | 13 +++++++++++++ include/linux/usb/phy.h | 13 +++++++++++++ 2 files changed, 26 insertions(+)