3b8d7321ed
This reverts commit 428aac8a81.
This isn't quite ready for 3.12, we need some more EHCI driver changes
that are just now showing up. So revert this for now, and queue it up
later for 3.13.
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
179 lines
3.8 KiB
C
179 lines
3.8 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/platform_device.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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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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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
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void usb_w90x900_remove(struct usb_hcd *hcd, 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 const struct hc_driver ehci_w90x900_hc_driver = {
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.description = hcd_name,
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.product_desc = "Nuvoton w90x900 EHCI Host Controller",
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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_USB2|HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.reset = ehci_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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#ifdef CONFIG_PM
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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#endif
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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_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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MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
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MODULE_DESCRIPTION("w90p910 usb ehci driver!");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:w90p910-ehci");
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