kernel/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
  41         dwc->xhci = xhci;
  42
  43         ret = platform_device_add_resources(xhci, dwc->xhci_resources,
  44                                                 DWC3_XHCI_RESOURCES_NUM);
  45         if (ret) {
  46                 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
  47                 goto err1;
  48         }
  49
  50         memset(&pdata, 0, sizeof(pdata));
  51
  52         pdata.usb3_lpm_capable = dwc->usb3_lpm_capable;
  53
  54         ret = platform_device_add_data(xhci, &pdata, sizeof(pdata));
  55         if (ret) {
  56                 dev_err(dwc->dev, "couldn't add platform data to xHCI device\n");
  57                 goto err1;
  58         }
  59
  60         phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
  61                           dev_name(&xhci->dev));
  62         phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
  63                           dev_name(&xhci->dev));
  64
  65         ret = platform_device_add(xhci);
  66         if (ret) {
  67                 dev_err(dwc->dev, "failed to register xHCI device\n");
  68                 goto err2;
  69         }
  70
  71         return 0;
  72 err2:
  73         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
  74                           dev_name(&xhci->dev));
  75         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
  76                           dev_name(&xhci->dev));
  77 err1:
  78         platform_device_put(xhci);
  79         return ret;
  80 }
  81
  82 void dwc3_host_exit(struct dwc3 *dwc)
  83 {
  84         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
  85                           dev_name(&dwc->xhci->dev));
  86         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
  87                           dev_name(&dwc->xhci->dev));
  88         platform_device_unregister(dwc->xhci);
  89 }