drivers/usb/dwc2/pci.c

   1 /*
   2  * pci.c - DesignWare HS OTG Controller PCI driver
   3  *
   4  * Copyright (C) 2004-2013 Synopsys, Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer,
  11  *    without modification.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The names of the above-listed copyright holders may not be used
  16  *    to endorse or promote products derived from this software without
  17  *    specific prior written permission.
  18  *
  19  * ALTERNATIVELY, this software may be distributed under the terms of the
  20  * GNU General Public License ("GPL") as published by the Free Software
  21  * Foundation; either version 2 of the License, or (at your option) any
  22  * later version.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  25  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  28  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  30  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  31  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  33  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  34  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 /*
  38  * Provides the initialization and cleanup entry points for the DWC_otg PCI
  39  * driver
  40  */
  41 #include <linux/kernel.h>
  42 #include <linux/module.h>
  43 #include <linux/moduleparam.h>
  44 #include <linux/spinlock.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/io.h>
  47 #include <linux/slab.h>
  48 #include <linux/pci.h>
  49 #include <linux/usb.h>
  50
  51 #include <linux/usb/hcd.h>
  52 #include <linux/usb/ch11.h>
  53 #include <linux/platform_device.h>
  54 #include <linux/usb/usb_phy_generic.h>
  55
  56 #define PCI_PRODUCT_ID_HAPS_HSOTG       0xabc0
  57
  58 static const char dwc2_driver_name[] = "dwc2-pci";
  59
  60 struct dwc2_pci_glue {
  61         struct platform_device *dwc2;
  62         struct platform_device *phy;
  63 };
  64
  65 static void dwc2_pci_remove(struct pci_dev *pci)
  66 {
  67         struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
  68
  69         platform_device_unregister(glue->dwc2);
  70         usb_phy_generic_unregister(glue->phy);
  71         kfree(glue);
  72         pci_set_drvdata(pci, NULL);
  73 }
  74
  75 static int dwc2_pci_probe(struct pci_dev *pci,
  76                 const struct pci_device_id *id)
  77 {
  78         struct resource         res[2];
  79         struct platform_device  *dwc2;
  80         struct platform_device  *phy;
  81         int                     ret;
  82         struct device           *dev = &pci->dev;
  83         struct dwc2_pci_glue    *glue;
  84
  85         ret = pcim_enable_device(pci);
  86         if (ret) {
  87                 dev_err(dev, "failed to enable pci device\n");
  88                 return -ENODEV;
  89         }
  90
  91         pci_set_master(pci);
  92
  93         dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
  94         if (!dwc2) {
  95                 dev_err(dev, "couldn't allocate dwc2 device\n");
  96                 return -ENOMEM;
  97         }
  98
  99         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 100
 101         res[0].start    = pci_resource_start(pci, 0);
 102         res[0].end      = pci_resource_end(pci, 0);
 103         res[0].name     = "dwc2";
 104         res[0].flags    = IORESOURCE_MEM;
 105
 106         res[1].start    = pci->irq;
 107         res[1].name     = "dwc2";
 108         res[1].flags    = IORESOURCE_IRQ;
 109
 110         ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
 111         if (ret) {
 112                 dev_err(dev, "couldn't add resources to dwc2 device\n");
 113                 return ret;
 114         }
 115
 116         dwc2->dev.parent = dev;
 117
 118         phy = usb_phy_generic_register();
 119         if (IS_ERR(phy)) {
 120                 dev_err(dev, "error registering generic PHY (%ld)\n",
 121                         PTR_ERR(phy));
 122                 return PTR_ERR(phy);
 123         }
 124
 125         ret = platform_device_add(dwc2);
 126         if (ret) {
 127                 dev_err(dev, "failed to register dwc2 device\n");
 128                 goto err;
 129         }
 130
 131         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
 132         if (!glue)
 133                 return -ENOMEM;
 134
 135         glue->phy = phy;
 136         glue->dwc2 = dwc2;
 137         pci_set_drvdata(pci, glue);
 138
 139         return 0;
 140 err:
 141         usb_phy_generic_unregister(phy);
 142         platform_device_put(dwc2);
 143         return ret;
 144 }
 145
 146 static const struct pci_device_id dwc2_pci_ids[] = {
 147         {
 148                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
 149         },
 150         {
 151                 PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
 152                            PCI_DEVICE_ID_STMICRO_USB_OTG),
 153         },
 154         { /* end: all zeroes */ }
 155 };
 156 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
 157
 158 static struct pci_driver dwc2_pci_driver = {
 159         .name = dwc2_driver_name,
 160         .id_table = dwc2_pci_ids,
 161         .probe = dwc2_pci_probe,
 162         .remove = dwc2_pci_remove,
 163 };
 164
 165 module_pci_driver(dwc2_pci_driver);
 166
 167 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
 168 MODULE_AUTHOR("Synopsys, Inc.");
 169 MODULE_LICENSE("Dual BSD/GPL");