Openwrt/target/linux/ramips/patches-3.14/0038-USB-add-OHCI-EHCI-OF-binding.patch

From ffb27de4760595c356ef619c97f25722c8db28e7 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sun, 27 Jul 2014 09:49:07 +0100
Subject: [PATCH 38/57] USB: add OHCI/EHCI OF binding

based on f3bc64d6d1f21c1b92d75f233a37b75d77af6963

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 drivers/usb/Makefile             |    3 ++-
 drivers/usb/host/ehci-platform.c |   21 +++++++++++++++++----
 drivers/usb/host/ohci-platform.c |   37 +++++++++++++++++++++++++++++++------
 3 files changed, 50 insertions(+), 11 deletions(-)

--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -11,6 +11,8 @@ obj-$(CONFIG_USB_DWC2)		+= dwc2/
 
 obj-$(CONFIG_USB_MON)		+= mon/
 
+obj-$(CONFIG_USB_PHY)		+= phy/
+
 obj-$(CONFIG_PCI)		+= host/
 obj-$(CONFIG_USB_EHCI_HCD)	+= host/
 obj-$(CONFIG_USB_ISP116X_HCD)	+= host/
@@ -41,7 +43,6 @@ obj-$(CONFIG_USB_TMC)		+= class/
 obj-$(CONFIG_USB_STORAGE)	+= storage/
 obj-$(CONFIG_USB)		+= storage/
 
-obj-$(CONFIG_USB_MDC800)	+= image/
 obj-$(CONFIG_USB_MICROTEK)	+= image/
 
 obj-$(CONFIG_USB_SERIAL)	+= serial/
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -29,6 +29,8 @@
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
 #include <linux/usb/ehci_pdriver.h>
+#include <linux/usb/phy.h>
+#include <linux/usb/otg.h>
 
 #include "ehci.h"
 
@@ -124,6 +126,15 @@ static int ehci_platform_probe(struct pl
 	hcd->rsrc_start = res_mem->start;
 	hcd->rsrc_len = resource_size(res_mem);
 
+#ifdef CONFIG_USB_PHY
+	hcd->phy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
+	if (!IS_ERR_OR_NULL(hcd->phy)) {
+		otg_set_host(hcd->phy->otg,
+				&hcd->self);
+		usb_phy_init(hcd->phy);
+	}
+#endif
+
 	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
 	if (IS_ERR(hcd->regs)) {
 		err = PTR_ERR(hcd->regs);
@@ -161,6 +172,9 @@ static int ehci_platform_remove(struct p
 	if (pdata == &ehci_platform_defaults)
 		dev->dev.platform_data = NULL;
 
+	if (pdata == &ehci_platform_defaults)
+		dev->dev.platform_data = NULL;
+
 	return 0;
 }
 
@@ -205,9 +219,8 @@ static int ehci_platform_resume(struct d
 #define ehci_platform_resume	NULL
 #endif /* CONFIG_PM */
 
-static const struct of_device_id vt8500_ehci_ids[] = {
-	{ .compatible = "via,vt8500-ehci", },
-	{ .compatible = "wm,prizm-ehci", },
+static const struct of_device_id ralink_ehci_ids[] = {
+	{ .compatible = "ralink,rt3xxx-ehci", },
 	{}
 };
 
@@ -231,7 +244,7 @@ static struct platform_driver ehci_platf
 		.owner	= THIS_MODULE,
 		.name	= "ehci-platform",
 		.pm	= &ehci_platform_pm_ops,
-		.of_match_table = vt8500_ehci_ids,
+		.of_match_table = ralink_ehci_ids,
 	}
 };
 
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -22,18 +22,22 @@
 #include <linux/platform_device.h>
 #include <linux/usb/ohci_pdriver.h>
 #include <linux/usb.h>
+#include <linux/usb/phy.h>
 #include <linux/usb/hcd.h>
+#include <linux/dma-mapping.h>
+#include <linux/of.h>
 
 #include "ohci.h"
 
 #define DRIVER_DESC "OHCI generic platform driver"
 
+static struct usb_ohci_pdata ohci_platform_defaults;
 static const char hcd_name[] = "ohci-platform";
 
 static int ohci_platform_reset(struct usb_hcd *hcd)
 {
 	struct platform_device *pdev = to_platform_device(hcd->self.controller);
-	struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);
+	struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);;
 	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 
 	if (pdata->big_endian_desc)
@@ -63,11 +67,18 @@ static int ohci_platform_probe(struct pl
 	int irq;
 	int err = -ENOMEM;
 
-	if (!pdata) {
-		WARN_ON(1);
-		return -ENODEV;
-	}
+	/*
+	 * use reasonable defaults so platforms don't have to provide these.
+	 * with DT probing on ARM, none of these are set.
+	 */
+	if (!dev->dev.platform_data)
+		dev->dev.platform_data = &ohci_platform_defaults;
+	if (!dev->dev.dma_mask)
+		dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
+	if (!dev->dev.coherent_dma_mask)
+		dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 
+	pdata = dev->dev.platform_data;
 	if (usb_disabled())
 		return -ENODEV;
 
@@ -99,6 +110,12 @@ static int ohci_platform_probe(struct pl
 	hcd->rsrc_start = res_mem->start;
 	hcd->rsrc_len = resource_size(res_mem);
 
+#ifdef CONFIG_USB_PHY
+	hcd->phy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
+	if (!IS_ERR_OR_NULL(hcd->phy))
+		usb_phy_init(hcd->phy);
+#endif
+
 	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
 	if (IS_ERR(hcd->regs)) {
 		err = PTR_ERR(hcd->regs);
@@ -134,6 +151,9 @@ static int ohci_platform_remove(struct p
 	if (pdata->power_off)
 		pdata->power_off(dev);
 
+	if (pdata == &ohci_platform_defaults)
+		dev->dev.platform_data = NULL;
+
 	return 0;
 }
 
@@ -180,6 +200,11 @@ static int ohci_platform_resume(struct d
 #define ohci_platform_resume	NULL
 #endif /* CONFIG_PM */
 
+static const struct of_device_id ralink_ohci_ids[] = {
+	{ .compatible = "ralink,rt3xxx-ohci", },
+	{}
+};
+
 static const struct platform_device_id ohci_platform_table[] = {
 	{ "ohci-platform", 0 },
 	{ }
@@ -200,6 +225,7 @@ static struct platform_driver ohci_platf
 		.owner	= THIS_MODULE,
 		.name	= "ohci-platform",
 		.pm	= &ohci_platform_pm_ops,
+		.of_match_table = of_match_ptr(ralink_ohci_ids),
 	}
 };