/* ehci-msm.c - HSUSB Host Controller Driver Implementation * * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved. * * Partly derived from ehci-fsl.c and ehci-hcd.c * Copyright (c) 2000-2004 by David Brownell * Copyright (c) 2005 MontaVista Software * * All source code in this file is licensed under the following license except * where indicated. * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * See the GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, you can find it at http://www.fsf.org */ #include #include #include #include #include #include #include #include #include #include #include #include #include "ehci.h" #define MSM_USB_BASE (hcd->regs) #define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller" static const char hcd_name[] = "ehci-msm"; static struct hc_driver __read_mostly msm_hc_driver; static int ehci_msm_reset(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); int retval; ehci->caps = USB_CAPLENGTH; hcd->has_tt = 1; retval = ehci_setup(hcd); if (retval) return retval; /* select ULPI phy and clear other status/control bits in PORTSC */ writel(PORTSC_PTS_ULPI, USB_PORTSC); /* bursts of unspecified length. */ writel(0, USB_AHBBURST); /* Use the AHB transactor, allow posted data writes */ writel(0x8, USB_AHBMODE); /* Disable streaming mode and select host mode */ writel(0x13, USB_USBMODE); /* Disable ULPI_TX_PKT_EN_CLR_FIX which is valid only for HSIC */ writel(readl(USB_GENCONFIG_2) & ~ULPI_TX_PKT_EN_CLR_FIX, USB_GENCONFIG_2); return 0; } static int ehci_msm_probe(struct platform_device *pdev) { struct usb_hcd *hcd; struct resource *res; struct usb_phy *phy; int ret; dev_dbg(&pdev->dev, "ehci_msm proble\n"); hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { dev_err(&pdev->dev, "Unable to create HCD\n"); return -ENOMEM; } ret = platform_get_irq(pdev, 0); if (ret < 0) { dev_err(&pdev->dev, "Unable to get IRQ resource\n"); goto put_hcd; } hcd->irq = ret; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Unable to get memory resource\n"); ret = -ENODEV; goto put_hcd; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { dev_err(&pdev->dev, "ioremap failed\n"); ret = -ENOMEM; goto put_hcd; } /* * If there is an OTG driver, let it take care of PHY initialization, * clock management, powering up VBUS, mapping of registers address * space and power management. */ if (pdev->dev.of_node) phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); else phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); if (IS_ERR(phy)) { if (PTR_ERR(phy) == -EPROBE_DEFER) { dev_err(&pdev->dev, "unable to find transceiver\n"); ret = -EPROBE_DEFER; goto put_hcd; } phy = NULL; } hcd->usb_phy = phy; device_init_wakeup(&pdev->dev, 1); if (phy && phy->otg) { /* * MSM OTG driver takes care of adding the HCD and * placing hardware into low power mode via runtime PM. */ ret = otg_set_host(phy->otg, &hcd->self); if (ret < 0) { dev_err(&pdev->dev, "unable to register with transceiver\n"); goto put_hcd; } pm_runtime_no_callbacks(&pdev->dev); pm_runtime_enable(&pdev->dev); } else { ret = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED); if (ret) goto put_hcd; } return 0; put_hcd: usb_put_hcd(hcd); return ret; } static int ehci_msm_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); device_init_wakeup(&pdev->dev, 0); pm_runtime_disable(&pdev->dev); pm_runtime_set_suspended(&pdev->dev); if (hcd->usb_phy && hcd->usb_phy->otg) otg_set_host(hcd->usb_phy->otg, NULL); else usb_remove_hcd(hcd); usb_put_hcd(hcd); return 0; } #ifdef CONFIG_PM static int ehci_msm_pm_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); struct ehci_hcd *ehci = hcd_to_ehci(hcd); bool do_wakeup = device_may_wakeup(dev); dev_dbg(dev, "ehci-msm PM suspend\n"); /* Only call ehci_suspend if ehci_setup has been done */ if (ehci->sbrn) return ehci_suspend(hcd, do_wakeup); return 0; } static int ehci_msm_pm_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); struct ehci_hcd *ehci = hcd_to_ehci(hcd); dev_dbg(dev, "ehci-msm PM resume\n"); /* Only call ehci_resume if ehci_setup has been done */ if (ehci->sbrn) ehci_resume(hcd, false); return 0; } #else #define ehci_msm_pm_suspend NULL #define ehci_msm_pm_resume NULL #endif static const struct dev_pm_ops ehci_msm_dev_pm_ops = { .suspend = ehci_msm_pm_suspend, .resume = ehci_msm_pm_resume, }; static const struct acpi_device_id msm_ehci_acpi_ids[] = { { "QCOM8040", 0 }, { } }; MODULE_DEVICE_TABLE(acpi, msm_ehci_acpi_ids); static const struct of_device_id msm_ehci_dt_match[] = { { .compatible = "qcom,ehci-host", }, {} }; MODULE_DEVICE_TABLE(of, msm_ehci_dt_match); static struct platform_driver ehci_msm_driver = { .probe = ehci_msm_probe, .remove = ehci_msm_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "msm_hsusb_host", .pm = &ehci_msm_dev_pm_ops, .of_match_table = msm_ehci_dt_match, .acpi_match_table = ACPI_PTR(msm_ehci_acpi_ids), }, }; static const struct ehci_driver_overrides msm_overrides __initconst = { .reset = ehci_msm_reset, }; static int __init ehci_msm_init(void) { if (usb_disabled()) return -ENODEV; pr_info("%s: " DRIVER_DESC "\n", hcd_name); ehci_init_driver(&msm_hc_driver, &msm_overrides); return platform_driver_register(&ehci_msm_driver); } module_init(ehci_msm_init); static void __exit ehci_msm_cleanup(void) { platform_driver_unregister(&ehci_msm_driver); } module_exit(ehci_msm_cleanup); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:msm-ehci"); MODULE_LICENSE("GPL");