1 files changed, 241 insertions, 70 deletions

diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 084503b03fc..4369299064c 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -3,6 +3,7 @@
  *
  * Copyright 2007 Michael Buesch <m@bues.ch>
  * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
+ * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
  *
  * Derived from the OCHI-SSB driver
  * Derived from the OHCI-PCI driver
@@ -13,92 +14,135 @@
  *
  * Licensed under the GNU/GPL. See COPYING for details.
  */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/hrtimer.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/phy/phy.h>
 #include <linux/platform_device.h>
+#include <linux/reset.h>
 #include <linux/usb/ohci_pdriver.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ohci.h"
+
+#define DRIVER_DESC "OHCI generic platform driver"
+#define OHCI_MAX_CLKS 3
+#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
+
+struct ohci_platform_priv {
+	struct clk *clks[OHCI_MAX_CLKS];
+	struct reset_control *rst;
+	struct phy *phy;
+};
+
+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 = pdev->dev.platform_data;
+	struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);
 	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
-	int err;
 
-	if (pdata->big_endian_desc)
-		ohci->flags |= OHCI_QUIRK_BE_DESC;
-	if (pdata->big_endian_mmio)
-		ohci->flags |= OHCI_QUIRK_BE_MMIO;
 	if (pdata->no_big_frame_no)
 		ohci->flags |= OHCI_QUIRK_FRAME_NO;
-
-	ohci_hcd_init(ohci);
-
 	if (pdata->num_ports)
 		ohci->num_ports = pdata->num_ports;
 
-	err = ohci_init(ohci);
-
-	return err;
+	return ohci_setup(hcd);
 }
 
-static int ohci_platform_start(struct usb_hcd *hcd)
+static int ohci_platform_power_on(struct platform_device *dev)
 {
-	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
-	int err;
+	struct usb_hcd *hcd = platform_get_drvdata(dev);
+	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
+	int clk, ret;
 
-	err = ohci_run(ohci);
-	if (err < 0) {
-		ohci_err(ohci, "can't start\n");
-		ohci_stop(hcd);
+	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
+		ret = clk_prepare_enable(priv->clks[clk]);
+		if (ret)
+			goto err_disable_clks;
 	}
 
-	return err;
-}
+	if (priv->phy) {
+		ret = phy_init(priv->phy);
+		if (ret)
+			goto err_disable_clks;
 
-static const struct hc_driver ohci_platform_hc_driver = {
-	.description		= hcd_name,
-	.product_desc		= "Generic Platform OHCI Controller",
-	.hcd_priv_size		= sizeof(struct ohci_hcd),
+		ret = phy_power_on(priv->phy);
+		if (ret)
+			goto err_exit_phy;
+	}
 
-	.irq			= ohci_irq,
-	.flags			= HCD_MEMORY | HCD_USB11,
+	return 0;
 
-	.reset			= ohci_platform_reset,
-	.start			= ohci_platform_start,
-	.stop			= ohci_stop,
-	.shutdown		= ohci_shutdown,
+err_exit_phy:
+	phy_exit(priv->phy);
+err_disable_clks:
+	while (--clk >= 0)
+		clk_disable_unprepare(priv->clks[clk]);
 
-	.urb_enqueue		= ohci_urb_enqueue,
-	.urb_dequeue		= ohci_urb_dequeue,
-	.endpoint_disable	= ohci_endpoint_disable,
+	return ret;
+}
 
-	.get_frame_number	= ohci_get_frame,
+static void ohci_platform_power_off(struct platform_device *dev)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(dev);
+	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
+	int clk;
 
-	.hub_status_data	= ohci_hub_status_data,
-	.hub_control		= ohci_hub_control,
-#ifdef	CONFIG_PM
-	.bus_suspend		= ohci_bus_suspend,
-	.bus_resume		= ohci_bus_resume,
-#endif
+	if (priv->phy) {
+		phy_power_off(priv->phy);
+		phy_exit(priv->phy);
+	}
+
+	for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
+		if (priv->clks[clk])
+			clk_disable_unprepare(priv->clks[clk]);
+}
+
+static struct hc_driver __read_mostly ohci_platform_hc_driver;
+
+static const struct ohci_driver_overrides platform_overrides __initconst = {
+	.product_desc =		"Generic Platform OHCI controller",
+	.reset =		ohci_platform_reset,
+	.extra_priv_size =	sizeof(struct ohci_platform_priv),
+};
 
-	.start_port_reset	= ohci_start_port_reset,
+static struct usb_ohci_pdata ohci_platform_defaults = {
+	.power_on =		ohci_platform_power_on,
+	.power_suspend =	ohci_platform_power_off,
+	.power_off =		ohci_platform_power_off,
 };
 
 static int ohci_platform_probe(struct platform_device *dev)
 {
 	struct usb_hcd *hcd;
 	struct resource *res_mem;
-	struct usb_ohci_pdata *pdata = dev->dev.platform_data;
-	int irq;
-	int err = -ENOMEM;
-
-	if (!pdata) {
-		WARN_ON(1);
-		return -ENODEV;
-	}
+	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
+	struct ohci_platform_priv *priv;
+	struct ohci_hcd *ohci;
+	int err, irq, clk = 0;
 
 	if (usb_disabled())
 		return -ENODEV;
 
+	/*
+	 * Use reasonable defaults so platforms don't have to provide these
+	 * with DT probing on ARM.
+	 */
+	if (!pdata)
+		pdata = &ohci_platform_defaults;
+
+	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
+	if (err)
+		return err;
+
 	irq = platform_get_irq(dev, 0);
 	if (irq < 0) {
 		dev_err(&dev->dev, "no irq provided");
@@ -111,40 +155,119 @@ static int ohci_platform_probe(struct platform_device *dev)
 		return -ENXIO;
 	}
 
+	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
+			dev_name(&dev->dev));
+	if (!hcd)
+		return -ENOMEM;
+
+	platform_set_drvdata(dev, hcd);
+	dev->dev.platform_data = pdata;
+	priv = hcd_to_ohci_priv(hcd);
+	ohci = hcd_to_ohci(hcd);
+
+	if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
+		if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
+			ohci->flags |= OHCI_QUIRK_BE_MMIO;
+
+		if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
+			ohci->flags |= OHCI_QUIRK_BE_DESC;
+
+		if (of_property_read_bool(dev->dev.of_node, "big-endian"))
+			ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
+
+		priv->phy = devm_phy_get(&dev->dev, "usb");
+		if (IS_ERR(priv->phy)) {
+			err = PTR_ERR(priv->phy);
+			if (err == -EPROBE_DEFER)
+				goto err_put_hcd;
+			priv->phy = NULL;
+		}
+
+		for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
+			priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
+			if (IS_ERR(priv->clks[clk])) {
+				err = PTR_ERR(priv->clks[clk]);
+				if (err == -EPROBE_DEFER)
+					goto err_put_clks;
+				priv->clks[clk] = NULL;
+				break;
+			}
+		}
+
+	}
+
+	priv->rst = devm_reset_control_get_optional(&dev->dev, NULL);
+	if (IS_ERR(priv->rst)) {
+		err = PTR_ERR(priv->rst);
+		if (err == -EPROBE_DEFER)
+			goto err_put_clks;
+		priv->rst = NULL;
+	} else {
+		err = reset_control_deassert(priv->rst);
+		if (err)
+			goto err_put_clks;
+	}
+
+	if (pdata->big_endian_desc)
+		ohci->flags |= OHCI_QUIRK_BE_DESC;
+	if (pdata->big_endian_mmio)
+		ohci->flags |= OHCI_QUIRK_BE_MMIO;
+
+#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
+	if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
+		dev_err(&dev->dev,
+			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
+		err = -EINVAL;
+		goto err_reset;
+	}
+#endif
+#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
+	if (ohci->flags & OHCI_QUIRK_BE_DESC) {
+		dev_err(&dev->dev,
+			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
+		err = -EINVAL;
+		goto err_reset;
+	}
+#endif
+
 	if (pdata->power_on) {
 		err = pdata->power_on(dev);
 		if (err < 0)
-			return err;
-	}
-
-	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
-			dev_name(&dev->dev));
-	if (!hcd) {
-		err = -ENOMEM;
-		goto err_power;
+			goto err_reset;
 	}
 
 	hcd->rsrc_start = res_mem->start;
 	hcd->rsrc_len = resource_size(res_mem);
 
-	hcd->regs = devm_request_and_ioremap(&dev->dev, res_mem);
-	if (!hcd->regs) {
-		err = -ENOMEM;
-		goto err_put_hcd;
+	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
+	if (IS_ERR(hcd->regs)) {
+		err = PTR_ERR(hcd->regs);
+		goto err_power;
 	}
 	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (err)
-		goto err_put_hcd;
+		goto err_power;
+
+	device_wakeup_enable(hcd->self.controller);
 
 	platform_set_drvdata(dev, hcd);
 
 	return err;
 
-err_put_hcd:
-	usb_put_hcd(hcd);
 err_power:
 	if (pdata->power_off)
 		pdata->power_off(dev);
+err_reset:
+	if (priv->rst)
+		reset_control_assert(priv->rst);
+err_put_clks:
+	while (--clk >= 0)
+		clk_put(priv->clks[clk]);
+err_put_hcd:
+	if (pdata == &ohci_platform_defaults)
+		dev->dev.platform_data = NULL;
+
+	usb_put_hcd(hcd);
 
 	return err;
 }
@@ -152,15 +275,26 @@ err_power:
 static int ohci_platform_remove(struct platform_device *dev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(dev);
-	struct usb_ohci_pdata *pdata = dev->dev.platform_data;
+	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
+	struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
+	int clk;
 
 	usb_remove_hcd(hcd);
-	usb_put_hcd(hcd);
-	platform_set_drvdata(dev, NULL);
 
 	if (pdata->power_off)
 		pdata->power_off(dev);
 
+	if (priv->rst)
+		reset_control_assert(priv->rst);
+
+	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
+		clk_put(priv->clks[clk]);
+
+	usb_put_hcd(hcd);
+
+	if (pdata == &ohci_platform_defaults)
+		dev->dev.platform_data = NULL;
+
 	return 0;
 }
 
@@ -168,20 +302,27 @@ static int ohci_platform_remove(struct platform_device *dev)
 
 static int ohci_platform_suspend(struct device *dev)
 {
+	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct usb_ohci_pdata *pdata = dev->platform_data;
 	struct platform_device *pdev =
 		container_of(dev, struct platform_device, dev);
+	bool do_wakeup = device_may_wakeup(dev);
+	int ret;
+
+	ret = ohci_suspend(hcd, do_wakeup);
+	if (ret)
+		return ret;
 
 	if (pdata->power_suspend)
 		pdata->power_suspend(pdev);
 
-	return 0;
+	return ret;
 }
 
 static int ohci_platform_resume(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
-	struct usb_ohci_pdata *pdata = dev->platform_data;
+	struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
 	struct platform_device *pdev =
 		container_of(dev, struct platform_device, dev);
 
@@ -200,6 +341,12 @@ static int ohci_platform_resume(struct device *dev)
 #define ohci_platform_resume	NULL
 #endif /* CONFIG_PM */
 
+static const struct of_device_id ohci_platform_ids[] = {
+	{ .compatible = "generic-ohci", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ohci_platform_ids);
+
 static const struct platform_device_id ohci_platform_table[] = {
 	{ "ohci-platform", 0 },
 	{ }
@@ -220,5 +367,29 @@ static struct platform_driver ohci_platform_driver = {
 		.owner	= THIS_MODULE,
 		.name	= "ohci-platform",
 		.pm	= &ohci_platform_pm_ops,
+		.of_match_table = ohci_platform_ids,
 	}
 };
+
+static int __init ohci_platform_init(void)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+	ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
+	return platform_driver_register(&ohci_platform_driver);
+}
+module_init(ohci_platform_init);
+
+static void __exit ohci_platform_cleanup(void)
+{
+	platform_driver_unregister(&ohci_platform_driver);
+}
+module_exit(ohci_platform_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Hauke Mehrtens");
+MODULE_AUTHOR("Alan Stern");
+MODULE_LICENSE("GPL");