This patch disables the auto-suspend feature for SMSC USB hub.
Renesas-RCAR3-H3-KF board was not able to detect the USB3.0 devices.
The XHCI driver was going to sleep and not wake up again on connection
of the USB3.0 device. According to Renesas, This is because of some
hardware issue.
Renesas-RCAR3-H3-KF has USB5534B 4-port SuperSpeed/Hi-Speed, low-power,
configurable hub controller.
Signed-off-by: Hardik Gajjar <hgajjar@xxxxxxxxxxxxxx>
---
drivers/usb/core/hub.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 939dd73a..ffc7abf 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -36,7 +36,9 @@
#include "otg_whitelist.h"
#define USB_VENDOR_GENESYS_LOGIC 0x05e3
+#define USB_VENDOR_SMSC 0x0424
#define HUB_QUIRK_CHECK_PORT_AUTOSUSPEND 0x01
+#define HUB_QUIRK_DISABLE_AUTOSUSPEND 0x02
#define USB_VENDOR_UNWIRED 0x2996
#define USB_VENDOR_DELPHI 0x2C48
@@ -1822,6 +1824,9 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
if (id->driver_info & HUB_QUIRK_NO_LOGICAL_DISCONNECT)
hub->quirk_no_logical_disconnect = 1;
+ if (id->driver_info & HUB_QUIRK_DISABLE_AUTOSUSPEND)
+ pm_runtime_set_autosuspend_delay(&hdev->dev, -1);
+
if (hub_configure(hub, &desc->endpoint[0].desc) >= 0)
return 0;
@@ -5313,6 +5318,10 @@ static void hub_event(struct work_struct *work)
}
static const struct usb_device_id hub_id_table[] = {
+ { .match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_CLASS,
+ .idVendor = USB_VENDOR_SMSC,
+ .bInterfaceClass = USB_CLASS_HUB,
+ .driver_info = HUB_QUIRK_DISABLE_AUTOSUSPEND},
{ .match_flags = USB_DEVICE_ID_MATCH_VENDOR
| USB_DEVICE_ID_MATCH_INT_CLASS,
.idVendor = USB_VENDOR_GENESYS_LOGIC,
--
2.7.4
