UPSTREAM: usb: dwc2: Add dwc2_core_reset()

dwc2_core_reset() was previously renamed to
dwc2_core_reset_and_dr_force_mode(). Now add back dwc2_core_reset() which
performs only a basic core reset without forcing the mode.

Change-Id: Id29e7e5d7bb473dd9f904a1a07cc544ba418805e
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
(cherry picked from commit b5d308abef1c5c0f24128845e41d414a8f8438f6)

diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index eb291c9e3c169e2d55c71e025b8ff940aabffb01..15f359fe76d3b67cc0ca920e5e966a74fc0bc7e5 100644 (file)
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -481,11 +481,10 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
  * Do core a soft reset of the core.  Be careful with this because it
  * resets all the internal state machines of the core.
  */
-int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg)
+int dwc2_core_reset(struct dwc2_hsotg *hsotg)
 {
        u32 greset;
        int count = 0;
-       u32 gusbcfg;
 
        dev_vdbg(hsotg->dev, "%s()\n", __func__);
 
@@ -517,6 +516,25 @@ int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg)
                }
        } while (!(greset & GRSTCTL_AHBIDLE));
 
+       return 0;
+}
+
+/*
+ * Do core a soft reset of the core.  Be careful with this because it
+ * resets all the internal state machines of the core.
+ *
+ * Additionally this will apply force mode as per the hsotg->dr_mode
+ * parameter.
+ */
+int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg)
+{
+       int retval;
+       u32 gusbcfg;
+
+       retval = dwc2_core_reset(hsotg);
+       if (retval)
+               return retval;
+
        if (hsotg->dr_mode == USB_DR_MODE_HOST) {
                gusbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
                gusbcfg &= ~GUSBCFG_FORCEDEVMODE;

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index be2985429177c8ed4f989b4cc4075b9245c90dfb..d605d7c88cdf288416da41358baea26cc00d873a 100644 (file)
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -908,6 +908,7 @@ enum dwc2_halt_status {
  * The following functions support initialization of the core driver component
  * and the DWC_otg controller
  */
+extern int dwc2_core_reset(struct dwc2_hsotg *hsotg);
 extern int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg);
 extern void dwc2_core_host_init(struct dwc2_hsotg *hsotg);
 extern int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg);