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>
164 lines
3.8 KiB
C
164 lines
3.8 KiB
C
/*
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* drivers/usb/host/ehci-vt8500.c
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*
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* Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
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*
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* Based on ehci-au1xxx.c
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/platform_device.h>
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static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int rc = 0;
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if (!udev->parent) /* udev is root hub itself, impossible */
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rc = -1;
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/* we only support lpm device connected to root hub yet */
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if (ehci->has_lpm && !udev->parent->parent) {
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rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
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if (!rc)
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rc = ehci_lpm_check(ehci, udev->portnum);
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}
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return rc;
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}
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static const struct hc_driver vt8500_ehci_hc_driver = {
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.description = hcd_name,
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.product_desc = "VT8500 EHCI",
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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_MEMORY | HCD_USB2,
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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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.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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/*
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* call back when device connected and addressed
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*/
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.update_device = ehci_update_device,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int vt8500_ehci_drv_probe(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 ret;
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if (usb_disabled())
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return -ENODEV;
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if (pdev->resource[1].flags != IORESOURCE_IRQ) {
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pr_debug("resource[1] is not IORESOURCE_IRQ");
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return -ENOMEM;
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}
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hcd = usb_create_hcd(&vt8500_ehci_hc_driver, &pdev->dev, "VT8500");
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if (!hcd)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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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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pr_debug("request_mem_region failed");
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ret = -EBUSY;
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goto err1;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs) {
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pr_debug("ioremap failed");
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ret = -ENOMEM;
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goto err2;
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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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ret = usb_add_hcd(hcd, pdev->resource[1].start,
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IRQF_SHARED);
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if (ret == 0) {
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platform_set_drvdata(pdev, hcd);
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return ret;
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}
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iounmap(hcd->regs);
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err2:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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err1:
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usb_put_hcd(hcd);
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return ret;
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}
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static int vt8500_ehci_drv_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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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static struct platform_driver vt8500_ehci_driver = {
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.probe = vt8500_ehci_drv_probe,
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.remove = vt8500_ehci_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "vt8500-ehci",
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.owner = THIS_MODULE,
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}
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};
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MODULE_ALIAS("platform:vt8500-ehci");
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