/* * 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 #include "xhci.h" #include "xhci-plat.h" #include "xhci-mvebu.h" #include "xhci-rcar.h" static struct hc_driver __read_mostly xhci_plat_hc_driver; static int xhci_plat_setup(struct usb_hcd *hcd); static int xhci_plat_start(struct usb_hcd *hcd); static const struct xhci_driver_overrides xhci_plat_overrides __initconst = { .extra_priv_size = sizeof(struct xhci_plat_priv), .reset = xhci_plat_setup, .start = xhci_plat_start, }; static void xhci_priv_plat_start(struct usb_hcd *hcd) { struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); if (priv->plat_start) priv->plat_start(hcd); } static int xhci_priv_init_quirk(struct usb_hcd *hcd) { struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); if (!priv->init_quirk) return 0; return priv->init_quirk(hcd); } 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) { int ret; ret = xhci_priv_init_quirk(hcd); if (ret) return ret; return xhci_gen_setup(hcd, xhci_plat_quirks); } static int xhci_plat_start(struct usb_hcd *hcd) { xhci_priv_plat_start(hcd); return xhci_run(hcd); } #ifdef CONFIG_OF static const struct xhci_plat_priv xhci_plat_marvell_armada = { .init_quirk = xhci_mvebu_mbus_init_quirk, }; static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = { .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1, .init_quirk = xhci_rcar_init_quirk, .plat_start = xhci_rcar_start, }; static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = { .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2, .init_quirk = xhci_rcar_init_quirk, .plat_start = xhci_rcar_start, }; static const struct xhci_plat_priv xhci_plat_renesas_rcar_r8a7796 = { .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V3, .init_quirk = xhci_rcar_init_quirk, .plat_start = xhci_rcar_start, }; static const struct of_device_id usb_xhci_of_match[] = { { .compatible = "generic-xhci", }, { .compatible = "xhci-platform", }, { .compatible = "marvell,armada-375-xhci", .data = &xhci_plat_marvell_armada, }, { .compatible = "marvell,armada-380-xhci", .data = &xhci_plat_marvell_armada, }, { .compatible = "renesas,xhci-r8a7790", .data = &xhci_plat_renesas_rcar_gen2, }, { .compatible = "renesas,xhci-r8a7791", .data = &xhci_plat_renesas_rcar_gen2, }, { .compatible = "renesas,xhci-r8a7793", .data = &xhci_plat_renesas_rcar_gen2, }, { .compatible = "renesas,xhci-r8a7795", .data = &xhci_plat_renesas_rcar_gen3, }, { .compatible = "renesas,xhci-r8a7796", .data = &xhci_plat_renesas_rcar_r8a7796, }, { .compatible = "renesas,rcar-gen2-xhci", .data = &xhci_plat_renesas_rcar_gen2, }, { .compatible = "renesas,rcar-gen3-xhci", .data = &xhci_plat_renesas_rcar_gen3, }, {}, }; MODULE_DEVICE_TABLE(of, usb_xhci_of_match); #endif static int xhci_plat_probe(struct platform_device *pdev) { const struct of_device_id *match; 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; /* Try to set 64-bit DMA first */ if (!pdev->dev.dma_mask) /* Platform did not initialize dma_mask */ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); else ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */ if (ret) { ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (ret) return ret; } 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; } else if (PTR_ERR(clk) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; goto put_hcd; } xhci = hcd_to_xhci(hcd); match = of_match_node(usb_xhci_of_match, pdev->dev.of_node); if (match) { const struct xhci_plat_priv *priv_match = match->data; struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); /* Just copy data for now */ if (priv_match) *priv = *priv_match; } device_wakeup_enable(hcd->self.controller); xhci->clk = clk; xhci->main_hcd = hcd; xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev, dev_name(&pdev->dev), hcd); if (!xhci->shared_hcd) { ret = -ENOMEM; goto disable_clk; } if (device_property_read_bool(&pdev->dev, "usb3-lpm-capable")) xhci->quirks |= XHCI_LPM_SUPPORT; 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(hcd, irq, IRQF_SHARED); if (ret) goto disable_usb_phy; ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); if (ret) goto dealloc_usb2_hcd; return 0; dealloc_usb2_hcd: usb_remove_hcd(hcd); disable_usb_phy: usb_phy_shutdown(hcd->usb_phy); put_usb3_hcd: usb_put_hcd(xhci->shared_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_remove_hcd(hcd); usb_put_hcd(xhci->shared_hcd); if (!IS_ERR(clk)) clk_disable_unprepare(clk); usb_put_hcd(hcd); 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 */ static const struct acpi_device_id usb_xhci_acpi_match[] = { /* XHCI-compliant USB Controller */ { "PNP0D10", }, { } }; MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match); 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), .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match), }, }; MODULE_ALIAS("platform:xhci-hcd"); static int __init xhci_plat_init(void) { xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides); 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"); v class='diffstat-header'>Diffstat (limited to 'drivers/usb/misc/lvstest.c')