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https://github.com/torvalds/linux
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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>
166 lines
3.6 KiB
C
166 lines
3.6 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation;version 2 of the License.
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*
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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 usb_w90x900_probe(const struct hc_driver *driver,
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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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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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retval = -ENXIO;
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goto err1;
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}
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hcd = usb_create_hcd(driver, &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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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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retval = -EBUSY;
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goto err2;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (hcd->regs == NULL) {
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retval = -EFAULT;
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goto err3;
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}
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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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goto err4;
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retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (retval != 0)
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goto err4;
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device_wakeup_enable(hcd->self.controller);
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return retval;
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err4:
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iounmap(hcd->regs);
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err3:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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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 void usb_w90x900_remove(struct usb_hcd *hcd,
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struct platform_device *pdev)
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{
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usb_remove_hcd(hcd);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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}
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static int ehci_w90x900_probe(struct platform_device *pdev)
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{
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if (usb_disabled())
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return -ENODEV;
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return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
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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_w90x900_remove(hcd, pdev);
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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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.owner = THIS_MODULE,
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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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