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 #ifdef CONFIG_DWC3_HOST_USB3_LPM_ENABLE
  53         pdata.usb3_lpm_capable = 1;
  54 #endif
  55
  56         ret = platform_device_add_data(xhci, &pdata, sizeof(pdata));
  57         if (ret) {
  58                 dev_err(dwc->dev, "couldn't add platform data to xHCI device\n");
  59                 goto err1;
  60         }
  61
  62         phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
  63                           dev_name(&xhci->dev));
  64         phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
  65                           dev_name(&xhci->dev));
  66
  67         ret = platform_device_add(xhci);
  68         if (ret) {
  69                 dev_err(dwc->dev, "failed to register xHCI device\n");
  70                 goto err2;
  71         }
  72
  73         return 0;
  74 err2:
  75         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
  76                           dev_name(&xhci->dev));
  77         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
  78                           dev_name(&xhci->dev));
  79 err1:
  80         platform_device_put(xhci);
  81         return ret;
  82 }
  83
  84 void dwc3_host_exit(struct dwc3 *dwc)
  85 {
  86         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
  87                           dev_name(&dwc->xhci->dev));
  88         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
  89                           dev_name(&dwc->xhci->dev));
  90         platform_device_unregister(dwc->xhci);
  91 }