/* ehci-msm.c - HSUSB Host Controller Driver Implementation * * Copyright (c) 2008-2010, 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 #define MSM_USB_BASE (hcd->regs) static struct otg_transceiver *otg; static int ehci_msm_reset(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); int retval; ehci->caps = USB_CAPLENGTH; ehci->regs = USB_CAPLENGTH + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); /* cache the data to minimize the chip reads*/ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); hcd->has_tt = 1; ehci->sbrn = HCD_USB2; retval = ehci_halt(ehci); if (retval) return retval; /* data structure init */ retval = ehci_init(hcd); if (retval) return retval; retval = ehci_reset(ehci); if (retval) return retval; /* bursts of unspecified length. */ writel(0, USB_AHBBURST); /* Use the AHB transactor */ writel(0, USB_AHBMODE); /* Disable streaming mode and select host mode */ writel(0x13, USB_USBMODE); ehci_port_power(ehci, 1); return 0; } static struct hc_driver msm_hc_driver = { .description = hcd_name, .product_desc = "Qualcomm On-Chip EHCI Host Controller", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_USB2 | HCD_MEMORY, .reset = ehci_msm_reset, .start = ehci_run, .stop = ehci_stop, .shutdown = ehci_shutdown, /* * managing i/o requests and associated device resources */ .urb_enqueue = ehci_urb_enqueue, .urb_dequeue = ehci_urb_dequeue, .endpoint_disable = ehci_endpoint_disable, .endpoint_reset = ehci_endpoint_reset, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, .relinquish_port = ehci_relinquish_port, .port_handed_over = ehci_port_handed_over, /* * PM support */ .bus_suspend = ehci_bus_suspend, .bus_resume = ehci_bus_resume, }; static int ehci_msm_probe(struct platform_device *pdev) { struct usb_hcd *hcd; struct resource *res; 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; } hcd->irq = platform_get_irq(pdev, 0); if (hcd->irq < 0) { dev_err(&pdev->dev, "Unable to get IRQ resource\n"); ret = hcd->irq; goto put_hcd; } 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 = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { dev_err(&pdev->dev, "ioremap failed\n"); ret = -ENOMEM; goto put_hcd; } /* * OTG driver takes care of PHY initialization, clock management, * powering up VBUS, mapping of registers address space and power * management. */ otg = otg_get_transceiver(); if (!otg) { dev_err(&pdev->dev, "unable to find transceiver\n"); ret = -ENODEV; goto unmap; } ret = otg_set_host(otg, &hcd->self); if (ret < 0) { dev_err(&pdev->dev, "unable to register with transceiver\n"); goto put_transceiver; } device_init_wakeup(&pdev->dev, 1); /* * OTG device parent of HCD takes care of putting * hardware into low power mode. */ pm_runtime_no_callbacks(&pdev->dev); pm_runtime_enable(&pdev->dev); return 0; put_transceiver: otg_put_transceiver(otg); unmap: iounmap(hcd->regs); put_hcd: usb_put_hcd(hcd); return ret; } static int __devexit 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); otg_set_host(otg, NULL); otg_put_transceiver(otg); 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); bool wakeup = device_may_wakeup(dev); dev_dbg(dev, "ehci-msm PM suspend\n"); /* * EHCI helper function has also the same check before manipulating * port wakeup flags. We do check here the same condition before * calling the same helper function to avoid bringing hardware * from Low power mode when there is no need for adjusting port * wakeup flags. */ if (hcd->self.root_hub->do_remote_wakeup && !wakeup) { pm_runtime_resume(dev); ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), wakeup); } return 0; } static int ehci_msm_pm_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); dev_dbg(dev, "ehci-msm PM resume\n"); ehci_prepare_ports_for_controller_resume(hcd_to_ehci(hcd)); 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 struct platform_driver ehci_msm_driver = { .probe = ehci_msm_probe, .remove = __devexit_p(ehci_msm_remove), .driver = { .name = "msm_hsusb_host", .pm = &ehci_msm_dev_pm_ops, }, };