1 files changed, 94 insertions, 101 deletions

diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index 87c1b7c34c0..ec9f7b75d49 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -12,25 +12,46 @@
  */
 
 #include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ehci.h"
+
+#define DRIVER_DESC "EHCI Atmel driver"
+
+static const char hcd_name[] = "ehci-atmel";
+static struct hc_driver __read_mostly ehci_atmel_hc_driver;
 
 /* interface and function clocks */
-static struct clk *iclk, *fclk;
+static struct clk *iclk, *fclk, *uclk;
 static int clocked;
 
 /*-------------------------------------------------------------------------*/
 
 static void atmel_start_clock(void)
 {
-	clk_enable(iclk);
-	clk_enable(fclk);
+	if (IS_ENABLED(CONFIG_COMMON_CLK)) {
+		clk_set_rate(uclk, 48000000);
+		clk_prepare_enable(uclk);
+	}
+	clk_prepare_enable(iclk);
+	clk_prepare_enable(fclk);
 	clocked = 1;
 }
 
 static void atmel_stop_clock(void)
 {
-	clk_disable(fclk);
-	clk_disable(iclk);
+	clk_disable_unprepare(fclk);
+	clk_disable_unprepare(iclk);
+	if (IS_ENABLED(CONFIG_COMMON_CLK))
+		clk_disable_unprepare(uclk);
 	clocked = 0;
 }
 
@@ -48,75 +69,12 @@ static void atmel_stop_ehci(struct platform_device *pdev)
 
 /*-------------------------------------------------------------------------*/
 
-static int ehci_atmel_setup(struct usb_hcd *hcd)
-{
-	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-	int retval = 0;
-
-	/* registers start at offset 0x0 */
-	ehci->caps = hcd->regs;
-	ehci->regs = hcd->regs +
-		HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
-	dbg_hcs_params(ehci, "reset");
-	dbg_hcc_params(ehci, "reset");
-
-	/* cache this readonly data; minimize chip reads */
-	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
-
-	retval = ehci_halt(ehci);
-	if (retval)
-		return retval;
-
-	/* data structure init */
-	retval = ehci_init(hcd);
-	if (retval)
-		return retval;
-
-	ehci->sbrn = 0x20;
-
-	ehci_reset(ehci);
-	ehci_port_power(ehci, 0);
-
-	return retval;
-}
-
-static const struct hc_driver ehci_atmel_hc_driver = {
-	.description		= hcd_name,
-	.product_desc		= "Atmel EHCI UHP HS",
-	.hcd_priv_size		= sizeof(struct ehci_hcd),
-
-	/* generic hardware linkage */
-	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2,
-
-	/* basic lifecycle operations */
-	.reset			= ehci_atmel_setup,
-	.start			= ehci_run,
-	.stop			= ehci_stop,
-	.shutdown		= ehci_shutdown,
-
-	/* managing i/o requests and associated device resources */
-	.urb_enqueue		= ehci_urb_enqueue,
-	.urb_dequeue		= ehci_urb_dequeue,
-	.endpoint_disable	= ehci_endpoint_disable,
-
-	/* scheduling support */
-	.get_frame_number	= ehci_get_frame,
-
-	/* root hub support */
-	.hub_status_data	= ehci_hub_status_data,
-	.hub_control		= ehci_hub_control,
-	.bus_suspend		= ehci_bus_suspend,
-	.bus_resume		= ehci_bus_resume,
-	.relinquish_port	= ehci_relinquish_port,
-	.port_handed_over	= ehci_port_handed_over,
-};
-
-static int __init ehci_atmel_drv_probe(struct platform_device *pdev)
+static int ehci_atmel_drv_probe(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd;
 	const struct hc_driver *driver = &ehci_atmel_hc_driver;
 	struct resource *res;
+	struct ehci_hcd *ehci;
 	int irq;
 	int retval;
 
@@ -134,6 +92,14 @@ static int __init ehci_atmel_drv_probe(struct platform_device *pdev)
 		goto fail_create_hcd;
 	}
 
+	/* Right now device-tree probed devices don't get dma_mask set.
+	 * Since shared usb code relies on it, set it here for now.
+	 * Once we have dma capability bindings this can go away.
+	 */
+	retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (retval)
+		goto fail_create_hcd;
+
 	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
 	if (!hcd) {
 		retval = -ENOMEM;
@@ -149,52 +115,50 @@ static int __init ehci_atmel_drv_probe(struct platform_device *pdev)
 		goto fail_request_resource;
 	}
 	hcd->rsrc_start = res->start;
-	hcd->rsrc_len = res->end - res->start + 1;
+	hcd->rsrc_len = resource_size(res);
 
-	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
-				driver->description)) {
-		dev_dbg(&pdev->dev, "controller already in use\n");
-		retval = -EBUSY;
+	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(hcd->regs)) {
+		retval = PTR_ERR(hcd->regs);
 		goto fail_request_resource;
 	}
 
-	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
-	if (hcd->regs == NULL) {
-		dev_dbg(&pdev->dev, "error mapping memory\n");
-		retval = -EFAULT;
-		goto fail_ioremap;
-	}
-
-	iclk = clk_get(&pdev->dev, "ehci_clk");
+	iclk = devm_clk_get(&pdev->dev, "ehci_clk");
 	if (IS_ERR(iclk)) {
 		dev_err(&pdev->dev, "Error getting interface clock\n");
 		retval = -ENOENT;
-		goto fail_get_iclk;
+		goto fail_request_resource;
 	}
-	fclk = clk_get(&pdev->dev, "uhpck");
+	fclk = devm_clk_get(&pdev->dev, "uhpck");
 	if (IS_ERR(fclk)) {
 		dev_err(&pdev->dev, "Error getting function clock\n");
 		retval = -ENOENT;
-		goto fail_get_fclk;
+		goto fail_request_resource;
+	}
+	if (IS_ENABLED(CONFIG_COMMON_CLK)) {
+		uclk = devm_clk_get(&pdev->dev, "usb_clk");
+		if (IS_ERR(uclk)) {
+			dev_err(&pdev->dev, "failed to get uclk\n");
+			retval = PTR_ERR(uclk);
+			goto fail_request_resource;
+		}
 	}
 
+	ehci = hcd_to_ehci(hcd);
+	/* registers start at offset 0x0 */
+	ehci->caps = hcd->regs;
+
 	atmel_start_ehci(pdev);
 
 	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (retval)
 		goto fail_add_hcd;
+	device_wakeup_enable(hcd->self.controller);
 
 	return retval;
 
 fail_add_hcd:
 	atmel_stop_ehci(pdev);
-	clk_put(fclk);
-fail_get_fclk:
-	clk_put(iclk);
-fail_get_iclk:
-	iounmap(hcd->regs);
-fail_ioremap:
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 fail_request_resource:
 	usb_put_hcd(hcd);
 fail_create_hcd:
@@ -204,27 +168,56 @@ fail_create_hcd:
 	return retval;
 }
 
-static int __exit ehci_atmel_drv_remove(struct platform_device *pdev)
+static int ehci_atmel_drv_remove(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(pdev);
 
-	ehci_shutdown(hcd);
 	usb_remove_hcd(hcd);
-	iounmap(hcd->regs);
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 	usb_put_hcd(hcd);
 
 	atmel_stop_ehci(pdev);
-	clk_put(fclk);
-	clk_put(iclk);
 	fclk = iclk = NULL;
 
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id atmel_ehci_dt_ids[] = {
+	{ .compatible = "atmel,at91sam9g45-ehci" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, atmel_ehci_dt_ids);
+#endif
+
 static struct platform_driver ehci_atmel_driver = {
 	.probe		= ehci_atmel_drv_probe,
-	.remove		= __exit_p(ehci_atmel_drv_remove),
+	.remove		= ehci_atmel_drv_remove,
 	.shutdown	= usb_hcd_platform_shutdown,
-	.driver.name	= "atmel-ehci",
+	.driver		= {
+		.name	= "atmel-ehci",
+		.of_match_table	= of_match_ptr(atmel_ehci_dt_ids),
+	},
 };
+
+static int __init ehci_atmel_init(void)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+	ehci_init_driver(&ehci_atmel_hc_driver, NULL);
+	return platform_driver_register(&ehci_atmel_driver);
+}
+module_init(ehci_atmel_init);
+
+static void __exit ehci_atmel_cleanup(void)
+{
+	platform_driver_unregister(&ehci_atmel_driver);
+}
+module_exit(ehci_atmel_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_ALIAS("platform:atmel-ehci");
+MODULE_AUTHOR("Nicolas Ferre");
+MODULE_LICENSE("GPL");