2 files changed, 90 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index f85ae5e6129d..831b75fa4386 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -43,6 +43,7 @@
 #include <linux/spinlock.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/dwc3-omap.h>
+#include <linux/usb/dwc3-omap.h>
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 #include <linux/ioport.h>
@@ -131,6 +132,8 @@ struct dwc3_omap {
         u32                     dma_status:1;
 };
 
+struct dwc3_omap                *_omap;
+
 static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
 {
         return readl(base + offset);
@@ -141,6 +144,57 @@ static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
         writel(value, base + offset);
 }
 
+void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
+{
+        u32                     val;
+        struct dwc3_omap        *omap = _omap;
+
+        switch (status) {
+        case OMAP_DWC3_ID_GROUND:
+                dev_dbg(omap->dev, "ID GND\n");
+
+                val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
+                val &= ~(USBOTGSS_UTMI_OTG_STATUS_IDDIG
+                                | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
+                                | USBOTGSS_UTMI_OTG_STATUS_SESSEND);
+                val |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID
+                                | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
+                dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val);
+                break;
+
+        case OMAP_DWC3_VBUS_VALID:
+                dev_dbg(omap->dev, "VBUS Connect\n");
+
+                val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
+                val &= ~USBOTGSS_UTMI_OTG_STATUS_SESSEND;
+                val |= USBOTGSS_UTMI_OTG_STATUS_IDDIG
+                                | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
+                                | USBOTGSS_UTMI_OTG_STATUS_SESSVALID
+                                | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
+                dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val);
+                break;
+
+        case OMAP_DWC3_ID_FLOAT:
+        case OMAP_DWC3_VBUS_OFF:
+                dev_dbg(omap->dev, "VBUS Disconnect\n");
+
+                val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
+                val &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSVALID
+                                | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
+                                | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT);
+                val |= USBOTGSS_UTMI_OTG_STATUS_SESSEND
+                                | USBOTGSS_UTMI_OTG_STATUS_IDDIG;
+                dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val);
+                break;
+
+        default:
+                dev_dbg(omap->dev, "ID float\n");
+        }
+
+        return;
+}
+EXPORT_SYMBOL_GPL(dwc3_omap_mailbox);
+
 static int dwc3_omap_register_phys(struct dwc3_omap *omap)
 {
         struct nop_usb_xceiv_platform_data pdata;
@@ -320,6 +374,12 @@ static int dwc3_omap_probe(struct platform_device *pdev)
         omap->irq       = irq;
         omap->base      = base;
 
+        /*
+         * REVISIT if we ever have two instances of the wrapper, we will be
+         * in big trouble
+         */
+        _omap   = omap;
+
         pm_runtime_enable(dev);
         ret = pm_runtime_get_sync(dev);
         if (ret < 0) {
diff --git a/include/linux/usb/dwc3-omap.h b/include/linux/usb/dwc3-omap.h
new file mode 100644
index 000000000000..51eae14477f7
--- /dev/null
+++ b/include/linux/usb/dwc3-omap.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2013 by Texas Instruments
+ *
+ * The Inventra Controller Driver for Linux is free software; you
+ * can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 2 as published by the Free Software
+ * Foundation.
+ */
+
+#ifndef __DWC3_OMAP_H__
+#define __DWC3_OMAP_H__
+
+enum omap_dwc3_vbus_id_status {
+        OMAP_DWC3_UNKNOWN = 0,
+        OMAP_DWC3_ID_GROUND,
+        OMAP_DWC3_ID_FLOAT,
+        OMAP_DWC3_VBUS_VALID,
+        OMAP_DWC3_VBUS_OFF,
+};
+
+#if (defined(CONFIG_USB_DWC3) || defined(CONFIG_USB_DWC3_MODULE))
+extern void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status);
+#else
+static inline void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
+{
+        return;
+}
+#endif
+
+#endif  /* __DWC3_OMAP_H__ */