182 lines
3.9 KiB
C
182 lines
3.9 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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/*ebable 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 __devinit 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 = res->end - res->start + 1;
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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_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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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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ehci->sbrn = 0x20;
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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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ehci_writel(ehci, 1, &ehci->regs->configured_flag);
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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_init,
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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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/*
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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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};
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static int __devinit 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 __devexit 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 = __devexit_p(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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