usb: dwc3: omap: Add an API to write to dwc mailbox (7e41bba9) · Commits · 戴 / test

drivers/usb/dwc3/dwc3-omap.c

+60 −0

Original line number	Diff line number	Diff line
		@@ -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) {

include/linux/usb/dwc3-omap.h

0 → 100644

+30 −0

Original line number	Diff line number	Diff line
		/*
		* 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__ */

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