mirror of https://gitee.com/openkylin/linux.git
152 lines
3.4 KiB
C
152 lines
3.4 KiB
C
/*
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* OHCI 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 ohci-au1xxx.c, and other Linux OHCI 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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#include <linux/signal.h>
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static int ohci_xls_probe_internal(const struct hc_driver *driver,
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struct platform_device *dev)
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{
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struct resource *res;
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struct usb_hcd *hcd;
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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(dev, 0);
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if (irq < 0) {
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dev_err(&dev->dev, "Found HC with no IRQ\n");
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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(dev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&dev->dev, "MMIO Handle incorrect!\n");
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return -ENODEV;
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}
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hcd = usb_create_hcd(driver, &dev->dev, "XLS");
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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,
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driver->description)) {
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dev_dbg(&dev->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(&dev->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_DISABLED | 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(&dev->dev, "init fail, %d\n", retval);
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return retval;
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}
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static int ohci_xls_reset(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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ohci_hcd_init(ohci);
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return ohci_init(ohci);
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}
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static int __devinit ohci_xls_start(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci;
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int ret;
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ohci = hcd_to_ohci(hcd);
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ret = ohci_run(ohci);
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if (ret < 0) {
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err("can't start %s", hcd->self.bus_name);
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ohci_stop(hcd);
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return ret;
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}
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return 0;
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}
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static struct hc_driver ohci_xls_hc_driver = {
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.description = hcd_name,
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.product_desc = "XLS OHCI Host Controller",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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.irq = ohci_irq,
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.flags = HCD_MEMORY | HCD_USB11,
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.reset = ohci_xls_reset,
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.start = ohci_xls_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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.get_frame_number = ohci_get_frame,
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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static int ohci_xls_probe(struct platform_device *dev)
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{
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int ret;
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pr_debug("In ohci_xls_probe");
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if (usb_disabled())
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return -ENODEV;
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ret = ohci_xls_probe_internal(&ohci_xls_hc_driver, dev);
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return ret;
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}
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static int ohci_xls_remove(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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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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static struct platform_driver ohci_xls_driver = {
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.probe = ohci_xls_probe,
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.remove = ohci_xls_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "ohci-xls-0",
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.owner = THIS_MODULE,
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},
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};
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