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 /* FIXME define these in <linux/pci_ids.h> */
  49 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
  50 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
  51
  52 struct dwc3_pci {
  53         struct device           *dev;
  54         struct platform_device  *dwc3;
  55         struct platform_device  *usb2_phy;
  56         struct platform_device  *usb3_phy;
  57 };
  58
  59 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
  60 {
  61         struct nop_usb_xceiv_platform_data pdata;
  62         struct platform_device  *pdev;
  63         int                     ret;
  64
  65         memset(&pdata, 0x00, sizeof(pdata));
  66
  67         pdev = platform_device_alloc("nop_usb_xceiv", 0);
  68         if (!pdev)
  69                 return -ENOMEM;
  70
  71         glue->usb2_phy = pdev;
  72         pdata.type = USB_PHY_TYPE_USB2;
  73
  74         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
  75         if (ret)
  76                 goto err1;
  77
  78         pdev = platform_device_alloc("nop_usb_xceiv", 1);
  79         if (!pdev) {
  80                 ret = -ENOMEM;
  81                 goto err1;
  82         }
  83
  84         glue->usb3_phy = pdev;
  85         pdata.type = USB_PHY_TYPE_USB3;
  86
  87         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
  88         if (ret)
  89                 goto err2;
  90
  91         ret = platform_device_add(glue->usb2_phy);
  92         if (ret)
  93                 goto err2;
  94
  95         ret = platform_device_add(glue->usb3_phy);
  96         if (ret)
  97                 goto err3;
  98
  99         return 0;
 100
 101 err3:
 102         platform_device_del(glue->usb2_phy);
 103
 104 err2:
 105         platform_device_put(glue->usb3_phy);
 106
 107 err1:
 108         platform_device_put(glue->usb2_phy);
 109
 110         return ret;
 111 }
 112
 113 static int dwc3_pci_probe(struct pci_dev *pci,
 114                 const struct pci_device_id *id)
 115 {
 116         struct resource         res[2];
 117         struct platform_device  *dwc3;
 118         struct dwc3_pci         *glue;
 119         int                     ret = -ENOMEM;
 120         struct device           *dev = &pci->dev;
 121
 122         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 123         if (!glue) {
 124                 dev_err(dev, "not enough memory\n");
 125                 return -ENOMEM;
 126         }
 127
 128         glue->dev = dev;
 129
 130         ret = pci_enable_device(pci);
 131         if (ret) {
 132                 dev_err(dev, "failed to enable pci device\n");
 133                 return -ENODEV;
 134         }
 135
 136         pci_set_master(pci);
 137
 138         ret = dwc3_pci_register_phys(glue);
 139         if (ret) {
 140                 dev_err(dev, "couldn't register PHYs\n");
 141                 return ret;
 142         }
 143
 144         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 145         if (!dwc3) {
 146                 dev_err(dev, "couldn't allocate dwc3 device\n");
 147                 ret = -ENOMEM;
 148                 goto err1;
 149         }
 150
 151         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 152
 153         res[0].start    = pci_resource_start(pci, 0);
 154         res[0].end      = pci_resource_end(pci, 0);
 155         res[0].name     = "dwc_usb3";
 156         res[0].flags    = IORESOURCE_MEM;
 157
 158         res[1].start    = pci->irq;
 159         res[1].name     = "dwc_usb3";
 160         res[1].flags    = IORESOURCE_IRQ;
 161
 162         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 163         if (ret) {
 164                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 165                 goto err1;
 166         }
 167
 168         pci_set_drvdata(pci, glue);
 169
 170         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
 171
 172         dwc3->dev.dma_mask = dev->dma_mask;
 173         dwc3->dev.dma_parms = dev->dma_parms;
 174         dwc3->dev.parent = dev;
 175         glue->dwc3 = dwc3;
 176
 177         ret = platform_device_add(dwc3);
 178         if (ret) {
 179                 dev_err(dev, "failed to register dwc3 device\n");
 180                 goto err3;
 181         }
 182
 183         return 0;
 184
 185 err3:
 186         pci_set_drvdata(pci, NULL);
 187         platform_device_put(dwc3);
 188 err1:
 189         pci_disable_device(pci);
 190
 191         return ret;
 192 }
 193
 194 static void dwc3_pci_remove(struct pci_dev *pci)
 195 {
 196         struct dwc3_pci *glue = pci_get_drvdata(pci);
 197
 198         platform_device_unregister(glue->dwc3);
 199         platform_device_unregister(glue->usb2_phy);
 200         platform_device_unregister(glue->usb3_phy);
 201         pci_set_drvdata(pci, NULL);
 202         pci_disable_device(pci);
 203 }
 204
 205 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 206         {
 207                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 208                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 209         },
 210         {  }    /* Terminating Entry */
 211 };
 212 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 213
 214 #ifdef CONFIG_PM
 215 static int dwc3_pci_suspend(struct device *dev)
 216 {
 217         struct pci_dev  *pci = to_pci_dev(dev);
 218
 219         pci_disable_device(pci);
 220
 221         return 0;
 222 }
 223
 224 static int dwc3_pci_resume(struct device *dev)
 225 {
 226         struct pci_dev  *pci = to_pci_dev(dev);
 227         int             ret;
 228
 229         ret = pci_enable_device(pci);
 230         if (ret) {
 231                 dev_err(dev, "can't re-enable device --> %d\n", ret);
 232                 return ret;
 233         }
 234
 235         pci_set_master(pci);
 236
 237         return 0;
 238 }
 239
 240 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 241         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 242 };
 243
 244 #define DEV_PM_OPS      (&dwc3_pci_dev_pm_ops)
 245 #else
 246 #define DEV_PM_OPS      NULL
 247 #endif /* CONFIG_PM */
 248
 249 static struct pci_driver dwc3_pci_driver = {
 250         .name           = "dwc3-pci",
 251         .id_table       = dwc3_pci_id_table,
 252         .probe          = dwc3_pci_probe,
 253         .remove         = dwc3_pci_remove,
 254         .driver         = {
 255                 .pm     = DEV_PM_OPS,
 256         },
 257 };
 258
 259 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 260 MODULE_LICENSE("Dual BSD/GPL");
 261 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 262
 263 module_pci_driver(dwc3_pci_driver);