--- /dev/null
+/*
+ * xhci-plat.c - xHCI host controller driver platform Bus Glue.
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ *
+ * A lot of code borrowed from the Linux xHCI driver.
+ *
+ * This program 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.
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/usb/phy.h>
+#include <linux/slab.h>
+#include <linux/usb/xhci_pdriver.h>
+
+#include "xhci.h"
+#include "xhci-mvebu.h"
+#include "xhci-rcar.h"
+
+static struct hc_driver __read_mostly xhci_plat_hc_driver;
+
+static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
+{
+ /*
+ * As of now platform drivers don't provide MSI support so we ensure
+ * here that the generic code does not try to make a pci_dev from our
+ * dev struct in order to setup MSI
+ */
+ xhci->quirks |= XHCI_PLAT;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_plat_setup(struct usb_hcd *hcd)
+{
+ struct device_node *of_node = hcd->self.controller->of_node;
+ int ret;
+
+ if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
+ of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) {
+ ret = xhci_rcar_init_quirk(hcd);
+ if (ret)
+ return ret;
+ }
+
+ return xhci_gen_setup(hcd, xhci_plat_quirks);
+}
+
+static int xhci_plat_start(struct usb_hcd *hcd)
+{
+ struct device_node *of_node = hcd->self.controller->of_node;
+
+ if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
+ of_device_is_compatible(of_node, "renesas,xhci-r8a7791"))
+ xhci_rcar_start(hcd);
+
+ return xhci_run(hcd);
+}
+
+static int xhci_plat_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
+ const struct hc_driver *driver;
+ struct xhci_hcd *xhci;
+ struct resource *res;
+ struct usb_hcd *hcd;
+ struct clk *clk;
+ int ret;
+ int irq;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ driver = &xhci_plat_hc_driver;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+
+ /* Initialize dma_mask and coherent_dma_mask to 32-bits */
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+ if (!pdev->dev.dma_mask)
+ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+ else
+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+
+ hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hcd->regs)) {
+ ret = PTR_ERR(hcd->regs);
+ goto put_hcd;
+ }
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ /*
+ * Not all platforms have a clk so it is not an error if the
+ * clock does not exists.
+ */
+ clk = devm_clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(clk)) {
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ goto put_hcd;
+ }
+
+ if (of_device_is_compatible(pdev->dev.of_node,
+ "marvell,armada-375-xhci") ||
+ of_device_is_compatible(pdev->dev.of_node,
+ "marvell,armada-380-xhci")) {
+ ret = xhci_mvebu_mbus_init_quirk(pdev);
+ if (ret)
+ goto disable_clk;
+ }
+
+ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto disable_clk;
+
+ device_wakeup_enable(hcd->self.controller);
+
+ /* USB 2.0 roothub is stored in the platform_device now. */
+ hcd = platform_get_drvdata(pdev);
+ xhci = hcd_to_xhci(hcd);
+ xhci->clk = clk;
+ xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
+ dev_name(&pdev->dev), hcd);
+ if (!xhci->shared_hcd) {
+ ret = -ENOMEM;
+ goto dealloc_usb2_hcd;
+ }
+
+ if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
+ (pdata && pdata->usb3_lpm_capable))
+ xhci->quirks |= XHCI_LPM_SUPPORT;
+ /*
+ * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
+ * is called by usb_add_hcd().
+ */
+ *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
+
+ if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+ xhci->shared_hcd->can_do_streams = 1;
+
+ hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
+ if (IS_ERR(hcd->usb_phy)) {
+ ret = PTR_ERR(hcd->usb_phy);
+ if (ret == -EPROBE_DEFER)
+ goto put_usb3_hcd;
+ hcd->usb_phy = NULL;
+ } else {
+ ret = usb_phy_init(hcd->usb_phy);
+ if (ret)
+ goto put_usb3_hcd;
+ }
+
+ ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto disable_usb_phy;
+
+ return 0;
+
+disable_usb_phy:
+ usb_phy_shutdown(hcd->usb_phy);
+
+put_usb3_hcd:
+ usb_put_hcd(xhci->shared_hcd);
+
+dealloc_usb2_hcd:
+ usb_remove_hcd(hcd);
+
+disable_clk:
+ if (!IS_ERR(clk))
+ clk_disable_unprepare(clk);
+
+put_hcd:
+ usb_put_hcd(hcd);
+
+ return ret;
+}
+
+static int xhci_plat_remove(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct clk *clk = xhci->clk;
+
+ usb_remove_hcd(xhci->shared_hcd);
+ usb_phy_shutdown(hcd->usb_phy);
+ usb_put_hcd(xhci->shared_hcd);
+
+ usb_remove_hcd(hcd);
+ if (!IS_ERR(clk))
+ clk_disable_unprepare(clk);
+ usb_put_hcd(hcd);
+ kfree(xhci);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int xhci_plat_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ /*
+ * xhci_suspend() needs `do_wakeup` to know whether host is allowed
+ * to do wakeup during suspend. Since xhci_plat_suspend is currently
+ * only designed for system suspend, device_may_wakeup() is enough
+ * to dertermine whether host is allowed to do wakeup. Need to
+ * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
+ * also applies to runtime suspend.
+ */
+ return xhci_suspend(xhci, device_may_wakeup(dev));
+}
+
+static int xhci_plat_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ return xhci_resume(xhci, 0);
+}
+
+static const struct dev_pm_ops xhci_plat_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
+};
+#define DEV_PM_OPS (&xhci_plat_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_OF
+static const struct of_device_id usb_xhci_of_match[] = {
+ { .compatible = "generic-xhci" },
+ { .compatible = "xhci-platform" },
+ { .compatible = "marvell,armada-375-xhci"},
+ { .compatible = "marvell,armada-380-xhci"},
+ { .compatible = "renesas,xhci-r8a7790"},
+ { .compatible = "renesas,xhci-r8a7791"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
+#endif
+
+static struct platform_driver usb_xhci_driver = {
+ .probe = xhci_plat_probe,
+ .remove = xhci_plat_remove,
+ .driver = {
+ .name = "xhci-hcd",
+ .pm = DEV_PM_OPS,
+ .of_match_table = of_match_ptr(usb_xhci_of_match),
+ },
+};
+MODULE_ALIAS("platform:xhci-hcd");
+
+static int __init xhci_plat_init(void)
+{
+ xhci_init_driver(&xhci_plat_hc_driver, xhci_plat_setup);
+ xhci_plat_hc_driver.start = xhci_plat_start;
+ return platform_driver_register(&usb_xhci_driver);
+}
+module_init(xhci_plat_init);
+
+static void __exit xhci_plat_exit(void)
+{
+ platform_driver_unregister(&usb_xhci_driver);
+}
+module_exit(xhci_plat_exit);
+
+MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff