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 int dwc2_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc2)
  66 {
  67         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
  68             pdev->device == PCI_PRODUCT_ID_HAPS_HSOTG) {
  69                 struct property_entry properties[] = {
  70                         { },
  71                 };
  72
  73                 return platform_device_add_properties(dwc2, properties);
  74         }
  75
  76         return 0;
  77 }
  78
  79 static void dwc2_pci_remove(struct pci_dev *pci)
  80 {
  81         struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
  82
  83         platform_device_unregister(glue->dwc2);
  84         usb_phy_generic_unregister(glue->phy);
  85         kfree(glue);
  86         pci_set_drvdata(pci, NULL);
  87 }
  88
  89 static int dwc2_pci_probe(struct pci_dev *pci,
  90                           const struct pci_device_id *id)
  91 {
  92         struct resource         res[2];
  93         struct platform_device  *dwc2;
  94         struct platform_device  *phy;
  95         int                     ret;
  96         struct device           *dev = &pci->dev;
  97         struct dwc2_pci_glue    *glue;
  98
  99         ret = pcim_enable_device(pci);
 100         if (ret) {
 101                 dev_err(dev, "failed to enable pci device\n");
 102                 return -ENODEV;
 103         }
 104
 105         pci_set_master(pci);
 106
 107         dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
 108         if (!dwc2) {
 109                 dev_err(dev, "couldn't allocate dwc2 device\n");
 110                 return -ENOMEM;
 111         }
 112
 113         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 114
 115         res[0].start    = pci_resource_start(pci, 0);
 116         res[0].end      = pci_resource_end(pci, 0);
 117         res[0].name     = "dwc2";
 118         res[0].flags    = IORESOURCE_MEM;
 119
 120         res[1].start    = pci->irq;
 121         res[1].name     = "dwc2";
 122         res[1].flags    = IORESOURCE_IRQ;
 123
 124         ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
 125         if (ret) {
 126                 dev_err(dev, "couldn't add resources to dwc2 device\n");
 127                 return ret;
 128         }
 129
 130         dwc2->dev.parent = dev;
 131
 132         phy = usb_phy_generic_register();
 133         if (IS_ERR(phy)) {
 134                 dev_err(dev, "error registering generic PHY (%ld)\n",
 135                         PTR_ERR(phy));
 136                 return PTR_ERR(phy);
 137         }
 138
 139         ret = dwc2_pci_quirks(pci, dwc2);
 140         if (ret)
 141                 goto err;
 142
 143         ret = platform_device_add(dwc2);
 144         if (ret) {
 145                 dev_err(dev, "failed to register dwc2 device\n");
 146                 goto err;
 147         }
 148
 149         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
 150         if (!glue)
 151                 return -ENOMEM;
 152
 153         glue->phy = phy;
 154         glue->dwc2 = dwc2;
 155         pci_set_drvdata(pci, glue);
 156
 157         return 0;
 158 err:
 159         usb_phy_generic_unregister(phy);
 160         platform_device_put(dwc2);
 161         return ret;
 162 }
 163
 164 static const struct pci_device_id dwc2_pci_ids[] = {
 165         {
 166                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
 167         },
 168         {
 169                 PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
 170                            PCI_DEVICE_ID_STMICRO_USB_OTG),
 171         },
 172         { /* end: all zeroes */ }
 173 };
 174 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
 175
 176 static struct pci_driver dwc2_pci_driver = {
 177         .name = dwc2_driver_name,
 178         .id_table = dwc2_pci_ids,
 179         .probe = dwc2_pci_probe,
 180         .remove = dwc2_pci_remove,
 181 };
 182
 183 module_pci_driver(dwc2_pci_driver);
 184
 185 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
 186 MODULE_AUTHOR("Synopsys, Inc.");
 187 MODULE_LICENSE("Dual BSD/GPL");