/* * xhci-plat.c - xHCI host controller driver platform Bus Glue. * * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com * Author: Sebastian Andrzej Siewior * * 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 #include #include #include #include #include #include #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; 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) return ret; } /* 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; } 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; ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); if (ret) goto put_usb3_hcd; return 0; 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_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); return xhci_suspend(xhci); } 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");