188 lines
4.2 KiB
C
188 lines
4.2 KiB
C
/*
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* MIPS CI13320A EHCI Host Controller driver
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* Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
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*
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* Copyright (C) 2012 MIPS Technologies, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/err.h>
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#include <linux/platform_device.h>
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static int ehci_sead3_setup(struct usb_hcd *hcd)
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{
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int ret;
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs + 0x100;
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#ifdef __BIG_ENDIAN
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ehci->big_endian_mmio = 1;
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ehci->big_endian_desc = 1;
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#endif
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ret = ehci_setup(hcd);
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if (ret)
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return ret;
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ehci->need_io_watchdog = 0;
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/* Set burst length to 16 words. */
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ehci_writel(ehci, 0x1010, &ehci->regs->reserved1[1]);
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return ret;
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}
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const struct hc_driver ehci_sead3_hc_driver = {
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.description = hcd_name,
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.product_desc = "SEAD-3 EHCI",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
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/*
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* basic lifecycle operations
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*
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*/
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.reset = ehci_sead3_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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/*
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* scheduling support
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*/
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.get_frame_number = ehci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd;
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struct resource *res;
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int ret;
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if (usb_disabled())
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return -ENODEV;
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if (pdev->resource[1].flags != IORESOURCE_IRQ) {
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pr_debug("resource[1] is not IORESOURCE_IRQ");
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return -ENOMEM;
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}
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hcd = usb_create_hcd(&ehci_sead3_hc_driver, &pdev->dev, "SEAD-3");
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if (!hcd)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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hcd->regs = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(hcd->regs)) {
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ret = PTR_ERR(hcd->regs);
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goto err1;
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}
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/* Root hub has integrated TT. */
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hcd->has_tt = 1;
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ret = usb_add_hcd(hcd, pdev->resource[1].start,
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IRQF_SHARED);
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if (ret == 0) {
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platform_set_drvdata(pdev, hcd);
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device_wakeup_enable(hcd->self.controller);
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return ret;
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}
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err1:
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usb_put_hcd(hcd);
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return ret;
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}
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static int ehci_hcd_sead3_drv_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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return 0;
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}
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#ifdef CONFIG_PM
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static int ehci_hcd_sead3_drv_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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bool do_wakeup = device_may_wakeup(dev);
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return ehci_suspend(hcd, do_wakeup);
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}
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static int ehci_hcd_sead3_drv_resume(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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ehci_resume(hcd, false);
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return 0;
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}
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static const struct dev_pm_ops sead3_ehci_pmops = {
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.suspend = ehci_hcd_sead3_drv_suspend,
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.resume = ehci_hcd_sead3_drv_resume,
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};
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#define SEAD3_EHCI_PMOPS (&sead3_ehci_pmops)
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#else
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#define SEAD3_EHCI_PMOPS NULL
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#endif
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static struct platform_driver ehci_hcd_sead3_driver = {
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.probe = ehci_hcd_sead3_drv_probe,
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.remove = ehci_hcd_sead3_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "sead3-ehci",
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.owner = THIS_MODULE,
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.pm = SEAD3_EHCI_PMOPS,
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}
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};
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MODULE_ALIAS("platform:sead3-ehci");
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