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
  20 #include "core.h"
  21
  22 int dwc3_host_init(struct dwc3 *dwc)
  23 {
  24         struct property_entry   props[2];
  25         struct platform_device  *xhci;
  26         int                     ret, irq;
  27         struct resource         *res;
  28         struct platform_device  *dwc3_pdev = to_platform_device(dwc->dev);
  29
  30         irq = platform_get_irq_byname(dwc3_pdev, "host");
  31         if (irq == -EPROBE_DEFER)
  32                 return irq;
  33
  34         if (irq <= 0) {
  35                 irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
  36                 if (irq == -EPROBE_DEFER)
  37                         return irq;
  38
  39                 if (irq <= 0) {
  40                         irq = platform_get_irq(dwc3_pdev, 0);
  41                         if (irq <= 0) {
  42                                 if (irq != -EPROBE_DEFER) {
  43                                         dev_err(dwc->dev,
  44                                                 "missing host IRQ\n");
  45                                 }
  46                                 if (!irq)
  47                                         irq = -EINVAL;
  48                                 return irq;
  49                         } else {
  50                                 res = platform_get_resource(dwc3_pdev,
  51                                                             IORESOURCE_IRQ, 0);
  52                         }
  53                 } else {
  54                         res = platform_get_resource_byname(dwc3_pdev,
  55                                                            IORESOURCE_IRQ,
  56                                                            "dwc_usb3");
  57                 }
  58
  59         } else {
  60                 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
  61                                                    "host");
  62         }
  63
  64         dwc->xhci_resources[1].start = irq;
  65         dwc->xhci_resources[1].end = irq;
  66         dwc->xhci_resources[1].flags = res->flags;
  67         dwc->xhci_resources[1].name = res->name;
  68
  69         xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
  70         if (!xhci) {
  71                 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
  72                 return -ENOMEM;
  73         }
  74
  75         dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
  76
  77         xhci->dev.parent        = dwc->dev;
  78         xhci->dev.dma_mask      = dwc->dev->dma_mask;
  79         xhci->dev.dma_parms     = dwc->dev->dma_parms;
  80
  81         dwc->xhci = xhci;
  82
  83         ret = platform_device_add_resources(xhci, dwc->xhci_resources,
  84                                                 DWC3_XHCI_RESOURCES_NUM);
  85         if (ret) {
  86                 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
  87                 goto err1;
  88         }
  89
  90         memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
  91
  92         if (dwc->usb3_lpm_capable) {
  93                 props[0].name = "usb3-lpm-capable";
  94                 ret = platform_device_add_properties(xhci, props);
  95                 if (ret) {
  96                         dev_err(dwc->dev, "failed to add properties to xHCI\n");
  97                         goto err1;
  98                 }
  99         }
 100
 101         phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
 102                           dev_name(&xhci->dev));
 103         phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
 104                           dev_name(&xhci->dev));
 105
 106         ret = platform_device_add(xhci);
 107         if (ret) {
 108                 dev_err(dwc->dev, "failed to register xHCI device\n");
 109                 goto err2;
 110         }
 111
 112         return 0;
 113 err2:
 114         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
 115                           dev_name(&xhci->dev));
 116         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
 117                           dev_name(&xhci->dev));
 118 err1:
 119         platform_device_put(xhci);
 120         return ret;
 121 }
 122
 123 void dwc3_host_exit(struct dwc3 *dwc)
 124 {
 125         phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
 126                           dev_name(&dwc->xhci->dev));
 127         phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
 128                           dev_name(&dwc->xhci->dev));
 129         platform_device_unregister(dwc->xhci);
 130 }