d214109875
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
131 lines
2.8 KiB
C
131 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/driver/usb/host/ehci-w90x900.c
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*
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* Copyright (c) 2008 Nuvoton technology corporation.
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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*/
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/kernel.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 "ehci.h"
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/* enable phy0 and phy1 for w90p910 */
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#define ENPHY (0x01<<8)
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#define PHY0_CTR (0xA4)
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#define PHY1_CTR (0xA8)
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#define DRIVER_DESC "EHCI w90x900 driver"
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static const char hcd_name[] = "ehci-w90x900 ";
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static struct hc_driver __read_mostly ehci_w90x900_hc_driver;
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static int ehci_w90x900_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci;
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struct resource *res;
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int retval = 0, irq;
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unsigned long val;
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hcd = usb_create_hcd(&ehci_w90x900_hc_driver,
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&pdev->dev, "w90x900 EHCI");
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if (!hcd) {
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retval = -ENOMEM;
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goto err1;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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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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retval = PTR_ERR(hcd->regs);
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goto err2;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs;
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ehci->regs = hcd->regs +
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HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
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/* enable PHY 0,1,the regs only apply to w90p910
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* 0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
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* w90p910 IC relative to ehci->regs.
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*/
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val = __raw_readl(ehci->regs+PHY0_CTR);
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val |= ENPHY;
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__raw_writel(val, ehci->regs+PHY0_CTR);
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val = __raw_readl(ehci->regs+PHY1_CTR);
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val |= ENPHY;
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__raw_writel(val, ehci->regs+PHY1_CTR);
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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retval = irq;
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goto err2;
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}
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retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (retval != 0)
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goto err2;
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device_wakeup_enable(hcd->self.controller);
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return retval;
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err2:
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usb_put_hcd(hcd);
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err1:
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return retval;
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}
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static int ehci_w90x900_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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static struct platform_driver ehci_hcd_w90x900_driver = {
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.probe = ehci_w90x900_probe,
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.remove = ehci_w90x900_remove,
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.driver = {
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.name = "w90x900-ehci",
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},
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};
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static int __init ehci_w90X900_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_w90x900_hc_driver, NULL);
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return platform_driver_register(&ehci_hcd_w90x900_driver);
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}
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module_init(ehci_w90X900_init);
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static void __exit ehci_w90X900_cleanup(void)
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{
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platform_driver_unregister(&ehci_hcd_w90x900_driver);
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}
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module_exit(ehci_w90X900_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
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MODULE_ALIAS("platform:w90p910-ehci");
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MODULE_LICENSE("GPL v2");
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