mirror of
https://github.com/torvalds/linux
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1a49e2ac96
This patch (as1564c) converts the EHCI platform drivers to use the central ehci_setup() routine for generic controller initialization rather than each having its own idiosyncratic approach. The major point of difficulty lies in ehci-pci's many vendor- and device-specific workarounds. Some of them have to be applied before calling ehci_setup() and some after, which necessitates a fair amount of code motion. The other platform drivers require much smaller changes. One point not addressed by the patch is whether ports should be powered on or off following initialization. The different drivers appear to handle this pretty much at random. In fact it shouldn't matter, because the hub driver turns on power to all ports when it binds to the root hub. Straightening that out will be left for another day. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
143 lines
3.3 KiB
C
143 lines
3.3 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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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs;
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return ehci_setup(ehci);
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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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