drivers/usb/dwc3/dwc3-pci.c

   1 /**
   2  * dwc3-pci.c - PCI Specific glue layer
   3  *
   4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
   5  *
   6  * Authors: Felipe Balbi <balbi@ti.com>,
   7  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions, and the following disclaimer,
  14  *    without modification.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The names of the above-listed copyright holders may not be used
  19  *    to endorse or promote products derived from this software without
  20  *    specific prior written permission.
  21  *
  22  * ALTERNATIVELY, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2, as published by the Free
  24  * Software Foundation.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  27  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  28  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  30  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  31  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  32  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  33  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  34  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  35  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #include <linux/kernel.h>
  40 #include <linux/module.h>
  41 #include <linux/slab.h>
  42 #include <linux/pci.h>
  43 #include <linux/platform_device.h>
  44
  45 #include <linux/usb/otg.h>
  46 #include <linux/usb/nop-usb-xceiv.h>
  47
  48 #include "core.h"
  49
  50 /* FIXME define these in <linux/pci_ids.h> */
  51 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
  52 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
  53
  54 struct dwc3_pci {
  55         struct device           *dev;
  56         struct platform_device  *dwc3;
  57         struct platform_device  *usb2_phy;
  58         struct platform_device  *usb3_phy;
  59 };
  60
  61 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
  62 {
  63         struct nop_usb_xceiv_platform_data pdata;
  64         struct platform_device  *pdev;
  65         int                     ret;
  66
  67         memset(&pdata, 0x00, sizeof(pdata));
  68
  69         pdev = platform_device_alloc("nop_usb_xceiv", 0);
  70         if (!pdev)
  71                 return -ENOMEM;
  72
  73         glue->usb2_phy = pdev;
  74         pdata.type = USB_PHY_TYPE_USB2;
  75
  76         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
  77         if (ret)
  78                 goto err1;
  79
  80         pdev = platform_device_alloc("nop_usb_xceiv", 1);
  81         if (!pdev) {
  82                 ret = -ENOMEM;
  83                 goto err1;
  84         }
  85
  86         glue->usb3_phy = pdev;
  87         pdata.type = USB_PHY_TYPE_USB3;
  88
  89         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
  90         if (ret)
  91                 goto err2;
  92
  93         ret = platform_device_add(glue->usb2_phy);
  94         if (ret)
  95                 goto err2;
  96
  97         ret = platform_device_add(glue->usb3_phy);
  98         if (ret)
  99                 goto err3;
 100
 101         return 0;
 102
 103 err3:
 104         platform_device_del(glue->usb2_phy);
 105
 106 err2:
 107         platform_device_put(glue->usb3_phy);
 108
 109 err1:
 110         platform_device_put(glue->usb2_phy);
 111
 112         return ret;
 113 }
 114
 115 static int dwc3_pci_probe(struct pci_dev *pci,
 116                 const struct pci_device_id *id)
 117 {
 118         struct resource         res[2];
 119         struct platform_device  *dwc3;
 120         struct dwc3_pci         *glue;
 121         int                     ret = -ENOMEM;
 122         struct device           *dev = &pci->dev;
 123
 124         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 125         if (!glue) {
 126                 dev_err(dev, "not enough memory\n");
 127                 return -ENOMEM;
 128         }
 129
 130         glue->dev = dev;
 131
 132         ret = pci_enable_device(pci);
 133         if (ret) {
 134                 dev_err(dev, "failed to enable pci device\n");
 135                 return -ENODEV;
 136         }
 137
 138         pci_set_power_state(pci, PCI_D0);
 139         pci_set_master(pci);
 140
 141         ret = dwc3_pci_register_phys(glue);
 142         if (ret) {
 143                 dev_err(dev, "couldn't register PHYs\n");
 144                 return ret;
 145         }
 146
 147         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 148         if (!dwc3) {
 149                 dev_err(dev, "couldn't allocate dwc3 device\n");
 150                 ret = -ENOMEM;
 151                 goto err1;
 152         }
 153
 154         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 155
 156         res[0].start    = pci_resource_start(pci, 0);
 157         res[0].end      = pci_resource_end(pci, 0);
 158         res[0].name     = "dwc_usb3";
 159         res[0].flags    = IORESOURCE_MEM;
 160
 161         res[1].start    = pci->irq;
 162         res[1].name     = "dwc_usb3";
 163         res[1].flags    = IORESOURCE_IRQ;
 164
 165         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 166         if (ret) {
 167                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 168                 goto err1;
 169         }
 170
 171         pci_set_drvdata(pci, glue);
 172
 173         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
 174
 175         dwc3->dev.dma_mask = dev->dma_mask;
 176         dwc3->dev.dma_parms = dev->dma_parms;
 177         dwc3->dev.parent = dev;
 178         glue->dwc3 = dwc3;
 179
 180         ret = platform_device_add(dwc3);
 181         if (ret) {
 182                 dev_err(dev, "failed to register dwc3 device\n");
 183                 goto err3;
 184         }
 185
 186         return 0;
 187
 188 err3:
 189         pci_set_drvdata(pci, NULL);
 190         platform_device_put(dwc3);
 191 err1:
 192         pci_disable_device(pci);
 193
 194         return ret;
 195 }
 196
 197 static void dwc3_pci_remove(struct pci_dev *pci)
 198 {
 199         struct dwc3_pci *glue = pci_get_drvdata(pci);
 200
 201         platform_device_unregister(glue->usb2_phy);
 202         platform_device_unregister(glue->usb3_phy);
 203         platform_device_unregister(glue->dwc3);
 204         pci_set_drvdata(pci, NULL);
 205         pci_disable_device(pci);
 206 }
 207
 208 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 209         {
 210                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 211                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 212         },
 213         {  }    /* Terminating Entry */
 214 };
 215 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 216
 217 static struct pci_driver dwc3_pci_driver = {
 218         .name           = "dwc3-pci",
 219         .id_table       = dwc3_pci_id_table,
 220         .probe          = dwc3_pci_probe,
 221         .remove         = dwc3_pci_remove,
 222 };
 223
 224 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 225 MODULE_LICENSE("Dual BSD/GPL");
 226 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 227
 228 module_pci_driver(dwc3_pci_driver);