usb: dwc2: Initialize the USB core for peripheral mode

Initialize the USB driver to peripheral mode when a B-Device connector
is attached.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

3 files changed, 8 insertions, 2 deletions

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 4905d8880869..4710935fbad3 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -966,6 +966,8 @@ extern int s3c_hsotg_remove(struct dwc2_hsotg *hsotg);
 extern int s3c_hsotg_suspend(struct dwc2_hsotg *dwc2);
 extern int s3c_hsotg_resume(struct dwc2_hsotg *dwc2);
 extern int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq);
+extern void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2);
+extern void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg);
 #else
 static inline int s3c_hsotg_remove(struct dwc2_hsotg *dwc2)
 { return 0; }
@@ -975,6 +977,8 @@ static inline int s3c_hsotg_resume(struct dwc2_hsotg *dwc2)
 { return 0; }
 static inline int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
 { return 0; }
+static inline void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2) {}
+static inline void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg) {}
 #endif
 
 #if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 9caea513eb0c..ec853406a930 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2125,7 +2125,7 @@ static int s3c_hsotg_corereset(struct dwc2_hsotg *hsotg)
  *
  * Issue a soft reset to the core, and await the core finishing it.
  */
-static void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg)
+void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg)
 {
         s3c_hsotg_corereset(hsotg);
 
@@ -2257,7 +2257,7 @@ static void s3c_hsotg_core_disconnect(struct dwc2_hsotg *hsotg)
         __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
 }
 
-static void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg)
+void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg)
 {
         /* remove the soft-disconnect and let's go */
         __bic32(hsotg->regs + DCTL, DCTL_SFTDISCON);
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index e377f58f5f4d..1a6dea323c8f 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -1371,6 +1371,8 @@ static void dwc2_conn_id_status_change(struct work_struct *work)
                 hsotg->op_state = OTG_STATE_B_PERIPHERAL;
                 dwc2_core_init(hsotg, false, -1);
                 dwc2_enable_global_interrupts(hsotg);
+                s3c_hsotg_core_init_disconnected(hsotg);
+                s3c_hsotg_core_connect(hsotg);
         } else {
                 /* A-Device connector (Host Mode) */
                 dev_dbg(hsotg->dev, "connId A\n");