LXR linux/drivers/usb/host/ehci-ixp4xx.c

   1/*
   2 * IXP4XX EHCI Host Controller Driver
   3 *
   4 * Author: Vladimir Barinov <vbarinov@ru.mvista.com>
   5 *
   6 * Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
   7 *
   8 * 2007 (c) MontaVista Software, Inc. This file is licensed under
   9 * the terms of the GNU General Public License version 2. This program
  10 * is licensed "as is" without any warranty of any kind, whether express
  11 * or implied.
  12 */
  13
  14#include <linux/platform_device.h>
  15
  16static int ixp4xx_ehci_init(struct usb_hcd *hcd)
  17{
  18        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  19        int retval = 0;
  20
  21        ehci->big_endian_desc = 1;
  22        ehci->big_endian_mmio = 1;
  23
  24        ehci->caps = hcd->regs + 0x100;
  25        ehci->regs = hcd->regs + 0x100
  26                + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
  27        ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
  28
  29        hcd->has_tt = 1;
  30        ehci_reset(ehci);
  31
  32        retval = ehci_init(hcd);
  33        if (retval)
  34                return retval;
  35
  36        ehci_port_power(ehci, 0);
  37
  38        return retval;
  39}
  40
  41static const struct hc_driver ixp4xx_ehci_hc_driver = {
  42        .description            = hcd_name,
  43        .product_desc           = "IXP4XX EHCI Host Controller",
  44        .hcd_priv_size          = sizeof(struct ehci_hcd),
  45        .irq                    = ehci_irq,
  46        .flags                  = HCD_MEMORY | HCD_USB2,
  47        .reset                  = ixp4xx_ehci_init,
  48        .start                  = ehci_run,
  49        .stop                   = ehci_stop,
  50        .shutdown               = ehci_shutdown,
  51        .urb_enqueue            = ehci_urb_enqueue,
  52        .urb_dequeue            = ehci_urb_dequeue,
  53        .endpoint_disable       = ehci_endpoint_disable,
  54        .get_frame_number       = ehci_get_frame,
  55        .hub_status_data        = ehci_hub_status_data,
  56        .hub_control            = ehci_hub_control,
  57#if defined(CONFIG_PM)
  58        .bus_suspend            = ehci_bus_suspend,
  59        .bus_resume             = ehci_bus_resume,
  60#endif
  61        .relinquish_port        = ehci_relinquish_port,
  62        .port_handed_over       = ehci_port_handed_over,
  63};
  64
  65static int ixp4xx_ehci_probe(struct platform_device *pdev)
  66{
  67        struct usb_hcd *hcd;
  68        const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
  69        struct resource *res;
  70        int irq;
  71        int retval;
  72
  73        if (usb_disabled())
  74                return -ENODEV;
  75
  76        res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  77        if (!res) {
  78                dev_err(&pdev->dev,
  79                        "Found HC with no IRQ. Check %s setup!\n",
  80                        dev_name(&pdev->dev));
  81                return -ENODEV;
  82        }
  83        irq = res->start;
  84
  85        hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
  86        if (!hcd) {
  87                retval = -ENOMEM;
  88                goto fail_create_hcd;
  89        }
  90
  91        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  92        if (!res) {
  93                dev_err(&pdev->dev,
  94                        "Found HC with no register addr. Check %s setup!\n",
  95                        dev_name(&pdev->dev));
  96                retval = -ENODEV;
  97                goto fail_request_resource;
  98        }
  99        hcd->rsrc_start = res->start;
 100        hcd->rsrc_len = res->end - res->start + 1;
 101
 102        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 103                                driver->description)) {
 104                dev_dbg(&pdev->dev, "controller already in use\n");
 105                retval = -EBUSY;
 106                goto fail_request_resource;
 107        }
 108
 109        hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 110        if (hcd->regs == NULL) {
 111                dev_dbg(&pdev->dev, "error mapping memory\n");
 112                retval = -EFAULT;
 113                goto fail_ioremap;
 114        }
 115
 116        retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 117        if (retval)
 118                goto fail_add_hcd;
 119
 120        return retval;
 121
 122fail_add_hcd:
 123        iounmap(hcd->regs);
 124fail_ioremap:
 125        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 126fail_request_resource:
 127        usb_put_hcd(hcd);
 128fail_create_hcd:
 129        dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
 130        return retval;
 131}
 132
 133static int ixp4xx_ehci_remove(struct platform_device *pdev)
 134{
 135        struct usb_hcd *hcd = platform_get_drvdata(pdev);
 136
 137        usb_remove_hcd(hcd);
 138        iounmap(hcd->regs);
 139        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 140        usb_put_hcd(hcd);
 141
 142        return 0;
 143}
 144
 145MODULE_ALIAS("platform:ixp4xx-ehci");
 146
 147static struct platform_driver ixp4xx_ehci_driver = {
 148        .probe = ixp4xx_ehci_probe,
 149        .remove = ixp4xx_ehci_remove,
 150        .driver = {
 151                .name = "ixp4xx-ehci",
 152        },
 153};
 154