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
  42 static struct resource generic_resources[] = {
  43         {
  44                 .flags = IORESOURCE_IRQ,
  45         },
  46         {
  47                 .flags = IORESOURCE_MEM,
  48         },
  49 };
  50
  51 int dwc3_host_init(struct dwc3 *dwc)
  52 {
  53         struct platform_device  *xhci;
  54         int                     ret;
  55
  56         xhci = platform_device_alloc("xhci-hcd", -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
  92 err1:
  93         platform_device_put(xhci);
  94
  95 err0:
  96         return ret;
  97 }
  98
  99 void dwc3_host_exit(struct dwc3 *dwc)
 100 {
 101         platform_device_unregister(dwc->xhci);
 102 }