LXR linux/drivers/usb/dwc3/host.c

   1/**
   2 * host.c - DesignWare USB3 DRD Controller Host Glue
   3 *
   4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
   5 *
   6 * Authors: Felipe Balbi <balbi@ti.com>,
   7 *
   8 * Redistribution and use in source and binary forms, with or without
   9 * modification, are permitted provided that the following conditions
  10 * are met:
  11 * 1. Redistributions of source code must retain the above copyright
  12 *    notice, this list of conditions, and the following disclaimer,
  13 *    without modification.
  14 * 2. Redistributions in binary form must reproduce the above copyright
  15 *    notice, this list of conditions and the following disclaimer in the
  16 *    documentation and/or other materials provided with the distribution.
  17 * 3. The names of the above-listed copyright holders may not be used
  18 *    to endorse or promote products derived from this software without
  19 *    specific prior written permission.
  20 *
  21 * ALTERNATIVELY, this software may be distributed under the terms of the
  22 * GNU General Public License ("GPL") version 2, as published by the Free
  23 * Software Foundation.
  24 *
  25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  26 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  27 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38#include <linux/platform_device.h>
  39
  40#include "core.h"
  41
  42static struct resource generic_resources[] = {
  43        {
  44                .flags = IORESOURCE_IRQ,
  45        },
  46        {
  47                .flags = IORESOURCE_MEM,
  48        },
  49};
  50
  51int dwc3_host_init(struct dwc3 *dwc)
  52{
  53        struct platform_device  *xhci;
  54        int                     ret;
  55
  56        xhci = platform_device_alloc("xhci", -1);
  57        if (!xhci) {
  58                dev_err(dwc->dev, "couldn't allocate xHCI device\n");
  59                ret = -ENOMEM;
  60                goto err0;
  61        }
  62
  63        dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
  64
  65        xhci->dev.parent        = dwc->dev;
  66        xhci->dev.dma_mask      = dwc->dev->dma_mask;
  67        xhci->dev.dma_parms     = dwc->dev->dma_parms;
  68
  69        dwc->xhci = xhci;
  70
  71        /* setup resources */
  72        generic_resources[0].start = dwc->irq;
  73
  74        generic_resources[1].start = dwc->res->start;
  75        generic_resources[1].end = dwc->res->start + 0x7fff;
  76
  77        ret = platform_device_add_resources(xhci, generic_resources,
  78                        ARRAY_SIZE(generic_resources));
  79        if (ret) {
  80                dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
  81                goto err1;
  82        }
  83
  84        ret = platform_device_add(xhci);
  85        if (ret) {
  86                dev_err(dwc->dev, "failed to register xHCI device\n");
  87                goto err1;
  88        }
  89
  90        return 0;
  91
  92err1:
  93        platform_device_put(xhci);
  94
  95err0:
  96        return ret;
  97}
  98
  99void dwc3_host_exit(struct dwc3 *dwc)
 100{
 101        platform_device_unregister(dwc->xhci);
 102}
 103