[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/usb/host/ehci-atmel.c b/src/kernel/linux/v4.14/drivers/usb/host/ehci-atmel.c
new file mode 100644
index 0000000..7440722
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/usb/host/ehci-atmel.c
@@ -0,0 +1,254 @@
+/*
+ * Driver for EHCI UHP on Atmel chips
+ *
+ * Copyright (C) 2009 Atmel Corporation,
+ * Nicolas Ferre <nicolas.ferre@atmel.com>
+ *
+ * Based on various ehci-*.c drivers
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#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";
+
+/* interface and function clocks */
+#define hcd_to_atmel_ehci_priv(h) \
+ ((struct atmel_ehci_priv *)hcd_to_ehci(h)->priv)
+
+struct atmel_ehci_priv {
+ struct clk *iclk;
+ struct clk *uclk;
+ bool clocked;
+};
+
+static struct hc_driver __read_mostly ehci_atmel_hc_driver;
+
+static const struct ehci_driver_overrides ehci_atmel_drv_overrides __initconst = {
+ .extra_priv_size = sizeof(struct atmel_ehci_priv),
+};
+
+/*-------------------------------------------------------------------------*/
+
+static void atmel_start_clock(struct atmel_ehci_priv *atmel_ehci)
+{
+ if (atmel_ehci->clocked)
+ return;
+
+ clk_prepare_enable(atmel_ehci->uclk);
+ clk_prepare_enable(atmel_ehci->iclk);
+ atmel_ehci->clocked = true;
+}
+
+static void atmel_stop_clock(struct atmel_ehci_priv *atmel_ehci)
+{
+ if (!atmel_ehci->clocked)
+ return;
+
+ clk_disable_unprepare(atmel_ehci->iclk);
+ clk_disable_unprepare(atmel_ehci->uclk);
+ atmel_ehci->clocked = false;
+}
+
+static void atmel_start_ehci(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
+
+ dev_dbg(&pdev->dev, "start\n");
+ atmel_start_clock(atmel_ehci);
+}
+
+static void atmel_stop_ehci(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
+
+ dev_dbg(&pdev->dev, "stop\n");
+ atmel_stop_clock(atmel_ehci);
+}
+
+/*-------------------------------------------------------------------------*/
+
+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;
+ struct atmel_ehci_priv *atmel_ehci;
+ int irq;
+ int retval;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_debug("Initializing Atmel-SoC USB Host Controller\n");
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(&pdev->dev,
+ "Found HC with no IRQ. Check %s setup!\n",
+ dev_name(&pdev->dev));
+ retval = -ENODEV;
+ 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;
+ goto fail_create_hcd;
+ }
+ atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hcd->regs)) {
+ retval = PTR_ERR(hcd->regs);
+ goto fail_request_resource;
+ }
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ atmel_ehci->iclk = devm_clk_get(&pdev->dev, "ehci_clk");
+ if (IS_ERR(atmel_ehci->iclk)) {
+ dev_err(&pdev->dev, "Error getting interface clock\n");
+ retval = -ENOENT;
+ goto fail_request_resource;
+ }
+
+ atmel_ehci->uclk = devm_clk_get(&pdev->dev, "usb_clk");
+ if (IS_ERR(atmel_ehci->uclk)) {
+ dev_err(&pdev->dev, "failed to get uclk\n");
+ retval = PTR_ERR(atmel_ehci->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);
+fail_request_resource:
+ usb_put_hcd(hcd);
+fail_create_hcd:
+ dev_err(&pdev->dev, "init %s fail, %d\n",
+ dev_name(&pdev->dev), retval);
+
+ return retval;
+}
+
+static int ehci_atmel_drv_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ usb_remove_hcd(hcd);
+ usb_put_hcd(hcd);
+
+ atmel_stop_ehci(pdev);
+
+ return 0;
+}
+
+static int __maybe_unused ehci_atmel_drv_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
+ int ret;
+
+ ret = ehci_suspend(hcd, false);
+ if (ret)
+ return ret;
+
+ atmel_stop_clock(atmel_ehci);
+ return 0;
+}
+
+static int __maybe_unused ehci_atmel_drv_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct atmel_ehci_priv *atmel_ehci = hcd_to_atmel_ehci_priv(hcd);
+
+ atmel_start_clock(atmel_ehci);
+ return ehci_resume(hcd, false);
+}
+
+#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 SIMPLE_DEV_PM_OPS(ehci_atmel_pm_ops, ehci_atmel_drv_suspend,
+ ehci_atmel_drv_resume);
+
+static struct platform_driver ehci_atmel_driver = {
+ .probe = ehci_atmel_drv_probe,
+ .remove = ehci_atmel_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = "atmel-ehci",
+ .pm = &ehci_atmel_pm_ops,
+ .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, &ehci_atmel_drv_overrides);
+ 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");