From: saranya <saranya.gopal@xxxxxxxxx> This patch adds static DRD mode for host/device mode switch. This fixes the issue where device mode was not working after DUT switches to host mode with 3.0 OTG connector. Signed-off-by: saranya <saranya.gopal@xxxxxxxxx> Signed-off-by: M Balaji <m.balaji@xxxxxxxxx> Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> --- changes since v4: Removed change-Id changes since V3: Added Reviewed-by Sathyanarayanan tag changes since V2: Incorporated Heikki's review comments and added Reviewed-by Heikki tag changes since V1: none drivers/usb/roles/intel-xhci-usb-role-switch.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c index dad2d19..0d1ea82 100644 --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c @@ -25,6 +25,9 @@ #define SW_VBUS_VALID BIT(24) #define SW_IDPIN_EN BIT(21) #define SW_IDPIN BIT(20) +#define SW_SWITCH_EN_CFG0 BIT(16) +#define SW_DRD_STATIC_HOST_CFG0 1 +#define SW_DRD_STATIC_DEV_CFG0 2 #define DUAL_ROLE_CFG1 0x6c #define HOST_MODE BIT(29) @@ -83,17 +86,22 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) case USB_ROLE_NONE: val |= SW_IDPIN; val &= ~SW_VBUS_VALID; + val &= ~(SW_DRD_STATIC_DEV_CFG0 | SW_DRD_STATIC_HOST_CFG0); break; case USB_ROLE_HOST: val &= ~SW_IDPIN; val &= ~SW_VBUS_VALID; + val &= ~SW_DRD_STATIC_DEV_CFG0; + val |= SW_DRD_STATIC_HOST_CFG0; break; case USB_ROLE_DEVICE: val |= SW_IDPIN; val |= SW_VBUS_VALID; + val &= ~SW_DRD_STATIC_HOST_CFG0; + val |= SW_DRD_STATIC_DEV_CFG0; break; } - val |= SW_IDPIN_EN; + val |= SW_IDPIN_EN | SW_SWITCH_EN_CFG0; writel(val, data->base + DUAL_ROLE_CFG0); -- 2.7.4
