mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3c9740a117
Individual controller driver has different requirement for wakeup setting, so move it from core to itself. In order to align with current etting the default wakeup setting is enabled (except for chipidea host). Pass compile test with below commands: make O=outout/all allmodconfig make -j$CPU_NUM O=outout/all drivers/usb Signed-off-by: Peter Chen <peter.chen@freescale.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
259 lines
5.9 KiB
C
259 lines
5.9 KiB
C
/*
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* Generic platform ehci driver
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*
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* Copyright 2007 Steven Brown <sbrown@cortland.com>
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* Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
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*
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* Derived from the ohci-ssb driver
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* Copyright 2007 Michael Buesch <m@bues.ch>
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*
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* Derived from the EHCI-PCI driver
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* Copyright (c) 2000-2004 by David Brownell
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*
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* Derived from the ohci-pci driver
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* Copyright 1999 Roman Weissgaerber
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* Copyright 2000-2002 David Brownell
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* Copyright 1999 Linus Torvalds
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* Copyright 1999 Gregory P. Smith
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/hrtimer.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/ehci_pdriver.h>
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#include "ehci.h"
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#define DRIVER_DESC "EHCI generic platform driver"
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static const char hcd_name[] = "ehci-platform";
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static int ehci_platform_reset(struct usb_hcd *hcd)
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{
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struct platform_device *pdev = to_platform_device(hcd->self.controller);
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struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int retval;
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hcd->has_tt = pdata->has_tt;
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ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
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ehci->big_endian_desc = pdata->big_endian_desc;
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ehci->big_endian_mmio = pdata->big_endian_mmio;
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if (pdata->pre_setup) {
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retval = pdata->pre_setup(hcd);
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if (retval < 0)
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return retval;
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}
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ehci->caps = hcd->regs + pdata->caps_offset;
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retval = ehci_setup(hcd);
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if (retval)
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return retval;
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if (pdata->no_io_watchdog)
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ehci->need_io_watchdog = 0;
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return 0;
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}
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static struct hc_driver __read_mostly ehci_platform_hc_driver;
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static const struct ehci_driver_overrides platform_overrides __initconst = {
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.reset = ehci_platform_reset,
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};
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static struct usb_ehci_pdata ehci_platform_defaults;
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static int ehci_platform_probe(struct platform_device *dev)
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{
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struct usb_hcd *hcd;
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struct resource *res_mem;
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struct usb_ehci_pdata *pdata;
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int irq;
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int err;
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if (usb_disabled())
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return -ENODEV;
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/*
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* use reasonable defaults so platforms don't have to provide these.
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* with DT probing on ARM, none of these are set.
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*/
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if (!dev_get_platdata(&dev->dev))
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dev->dev.platform_data = &ehci_platform_defaults;
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err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
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if (err)
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return err;
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pdata = dev_get_platdata(&dev->dev);
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irq = platform_get_irq(dev, 0);
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if (irq < 0) {
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dev_err(&dev->dev, "no irq provided");
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return irq;
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}
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res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
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if (!res_mem) {
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dev_err(&dev->dev, "no memory resource provided");
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return -ENXIO;
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}
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if (pdata->power_on) {
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err = pdata->power_on(dev);
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if (err < 0)
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return err;
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}
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hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
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dev_name(&dev->dev));
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if (!hcd) {
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err = -ENOMEM;
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goto err_power;
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}
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hcd->rsrc_start = res_mem->start;
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hcd->rsrc_len = resource_size(res_mem);
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hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
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if (IS_ERR(hcd->regs)) {
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err = PTR_ERR(hcd->regs);
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goto err_put_hcd;
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}
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err = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (err)
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goto err_put_hcd;
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device_wakeup_enable(hcd->self.controller);
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platform_set_drvdata(dev, hcd);
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return err;
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err_put_hcd:
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usb_put_hcd(hcd);
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err_power:
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if (pdata->power_off)
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pdata->power_off(dev);
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return err;
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}
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static int ehci_platform_remove(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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if (pdata->power_off)
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pdata->power_off(dev);
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if (pdata == &ehci_platform_defaults)
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dev->dev.platform_data = NULL;
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return 0;
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}
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#ifdef CONFIG_PM
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static int ehci_platform_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
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struct platform_device *pdev =
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container_of(dev, struct platform_device, dev);
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bool do_wakeup = device_may_wakeup(dev);
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int ret;
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ret = ehci_suspend(hcd, do_wakeup);
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if (pdata->power_suspend)
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pdata->power_suspend(pdev);
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return ret;
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}
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static int ehci_platform_resume(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
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struct platform_device *pdev =
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container_of(dev, struct platform_device, dev);
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if (pdata->power_on) {
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int err = pdata->power_on(pdev);
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if (err < 0)
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return err;
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}
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ehci_resume(hcd, false);
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return 0;
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}
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#else /* !CONFIG_PM */
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#define ehci_platform_suspend NULL
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#define ehci_platform_resume NULL
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#endif /* CONFIG_PM */
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static const struct of_device_id vt8500_ehci_ids[] = {
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{ .compatible = "via,vt8500-ehci", },
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{ .compatible = "wm,prizm-ehci", },
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{}
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};
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static const struct platform_device_id ehci_platform_table[] = {
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{ "ehci-platform", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(platform, ehci_platform_table);
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static const struct dev_pm_ops ehci_platform_pm_ops = {
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.suspend = ehci_platform_suspend,
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.resume = ehci_platform_resume,
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};
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static struct platform_driver ehci_platform_driver = {
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.id_table = ehci_platform_table,
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.probe = ehci_platform_probe,
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.remove = ehci_platform_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.owner = THIS_MODULE,
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.name = "ehci-platform",
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.pm = &ehci_platform_pm_ops,
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.of_match_table = vt8500_ehci_ids,
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}
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};
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static int __init ehci_platform_init(void)
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{
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if (usb_disabled())
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return -ENODEV;
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pr_info("%s: " DRIVER_DESC "\n", hcd_name);
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ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
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return platform_driver_register(&ehci_platform_driver);
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}
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module_init(ehci_platform_init);
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static void __exit ehci_platform_cleanup(void)
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{
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platform_driver_unregister(&ehci_platform_driver);
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}
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module_exit(ehci_platform_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Hauke Mehrtens");
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MODULE_AUTHOR("Alan Stern");
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MODULE_LICENSE("GPL");
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