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  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2  of
  10  * the License as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/platform_device.h>
  19 #include <linux/usb/xhci_pdriver.h>
  20
  21 #include "core.h"
  22
  23 int dwc3_host_init(struct dwc3 *dwc)
  24 {
  25         struct platform_device  *xhci;
  26         struct usb_xhci_pdata   pdata;
  27         int                     ret;
  28
  29         xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
  30         if (!xhci) {
  31                 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
  32                 return -ENOMEM;
  33         }
  34
  35         dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
  36
  37         xhci->dev.parent        = dwc->dev;
  38         xhci->dev.dma_mask      = dwc->dev->dma_mask;
  39         xhci->dev.dma_parms     = dwc->dev->dma_parms;
  40         xhci->dev.archdata      = dwc->dev->archdata;
  41
  42         dwc->xhci = xhci;
  43
  44         ret = platform_device_add_resources(xhci, dwc->xhci_resources,
  45                                                 DWC3_XHCI_RESOURCES_NUM);
  46         if (ret) {
  47                 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
  48                 goto err1;
  49         }
  50
  51         memset(&pdata, 0, sizeof(pdata));
  52
  53         pdata.usb3_lpm_capable = dwc->usb3_lpm_capable;
  54
  55         ret = platform_device_add_data(xhci, &pdata, sizeof(pdata));
  56         if (ret) {
  57                 dev_err(dwc->dev, "couldn't add platform data to xHCI device\n");
  58                 goto err1;
  59         }
  60
  61         phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
  62                           dev_name(&xhci->dev));
  63         phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
  64                           dev_name(&xhci->dev));
  65
  66         ret = platform_device_add(xhci);
  67         if (ret) {
  68                 dev_err(dwc->dev, "failed to register xHCI device\n");
  69                 goto err2;
  70         }
  71
  72         return 0;
  73 err2:
  74         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
  75                           dev_name(&xhci->dev));
  76         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
  77                           dev_name(&xhci->dev));
  78 err1:
  79         platform_device_put(xhci);
  80         return ret;
  81 }
  82
  83 void dwc3_host_exit(struct dwc3 *dwc)
  84 {
  85         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
  86                           dev_name(&dwc->xhci->dev));
  87         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
  88                           dev_name(&dwc->xhci->dev));
  89         platform_device_unregister(dwc->xhci);
  90 }