162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/*
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* EHCI HCD for Netlogic XLS processors.
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*
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* (C) Copyright 2011 Netlogic Microsystems Inc.
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*
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* Based on various ehci-*.c drivers
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/platform_device.h>
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static int ehci_xls_setup(struct usb_hcd *hcd)
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{
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int retval;
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struct ehci_hcd *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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dbg_hcs_params(ehci, "reset");
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dbg_hcc_params(ehci, "reset");
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/* cache this readonly data; minimize chip reads */
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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retval = ehci_halt(ehci);
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if (retval)
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return retval;
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/* data structure init */
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retval = ehci_init(hcd);
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if (retval)
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return retval;
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ehci_reset(ehci);
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return retval;
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}
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int ehci_xls_probe_internal(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 resource *res;
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int retval, irq;
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/* Get our IRQ from an earlier registered Platform Resource */
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n",
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dev_name(&pdev->dev));
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return -ENODEV;
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}
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/* Get our Memory Handle */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "Error: MMIO Handle %s setup!\n",
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dev_name(&pdev->dev));
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return -ENODEV;
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}
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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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,
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driver->description)) {
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dev_dbg(&pdev->dev, "controller already in use\n");
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retval = -EBUSY;
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goto err2;
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}
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hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
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if (hcd->regs == NULL) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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retval = -EFAULT;
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goto err3;
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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 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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dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev),
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retval);
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return retval;
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}
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static struct hc_driver ehci_xls_hc_driver = {
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.description = hcd_name,
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.product_desc = "XLS EHCI Host Controller",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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.irq = ehci_irq,
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.flags = HCD_USB2 | HCD_MEMORY,
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.reset = ehci_xls_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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.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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.get_frame_number = ehci_get_frame,
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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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_xls_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 ehci_xls_probe_internal(&ehci_xls_hc_driver, pdev);
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}
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static int ehci_xls_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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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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return 0;
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}
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MODULE_ALIAS("ehci-xls");
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static struct platform_driver ehci_xls_driver = {
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.probe = ehci_xls_probe,
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.remove = ehci_xls_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "ehci-xls",
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},
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};
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