drivers/usb/dwc2/pci.c

   1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
   2 /*
   3  * pci.c - DesignWare HS OTG Controller PCI driver
   4  *
   5  * Copyright (C) 2004-2013 Synopsys, Inc.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The names of the above-listed copyright holders may not be used
  17  *    to endorse or promote products derived from this software without
  18  *    specific prior written permission.
  19  *
  20  * ALTERNATIVELY, this software may be distributed under the terms of the
  21  * GNU General Public License ("GPL") as published by the Free Software
  22  * Foundation; either version 2 of the License, or (at your option) any
  23  * later version.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  26  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  27  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  29  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  30  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  31  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  32  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * Provides the initialization and cleanup entry points for the DWC_otg PCI
  40  * driver
  41  */
  42 #include <linux/kernel.h>
  43 #include <linux/module.h>
  44 #include <linux/moduleparam.h>
  45 #include <linux/spinlock.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/io.h>
  48 #include <linux/slab.h>
  49 #include <linux/pci.h>
  50 #include <linux/usb.h>
  51
  52 #include <linux/usb/hcd.h>
  53 #include <linux/usb/ch11.h>
  54 #include <linux/platform_device.h>
  55 #include <linux/usb/usb_phy_generic.h>
  56
  57 #define PCI_PRODUCT_ID_HAPS_HSOTG       0xabc0
  58
  59 static const char dwc2_driver_name[] = "dwc2-pci";
  60
  61 struct dwc2_pci_glue {
  62         struct platform_device *dwc2;
  63         struct platform_device *phy;
  64 };
  65
  66 static int dwc2_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc2)
  67 {
  68         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
  69             pdev->device == PCI_PRODUCT_ID_HAPS_HSOTG) {
  70                 struct property_entry properties[] = {
  71                         { },
  72                 };
  73
  74                 return platform_device_add_properties(dwc2, properties);
  75         }
  76
  77         return 0;
  78 }
  79
  80 static void dwc2_pci_remove(struct pci_dev *pci)
  81 {
  82         struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
  83
  84         platform_device_unregister(glue->dwc2);
  85         usb_phy_generic_unregister(glue->phy);
  86         kfree(glue);
  87         pci_set_drvdata(pci, NULL);
  88 }
  89
  90 static int dwc2_pci_probe(struct pci_dev *pci,
  91                           const struct pci_device_id *id)
  92 {
  93         struct resource         res[2];
  94         struct platform_device  *dwc2;
  95         struct platform_device  *phy;
  96         int                     ret;
  97         struct device           *dev = &pci->dev;
  98         struct dwc2_pci_glue    *glue;
  99
 100         ret = pcim_enable_device(pci);
 101         if (ret) {
 102                 dev_err(dev, "failed to enable pci device\n");
 103                 return -ENODEV;
 104         }
 105
 106         pci_set_master(pci);
 107
 108         dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
 109         if (!dwc2) {
 110                 dev_err(dev, "couldn't allocate dwc2 device\n");
 111                 return -ENOMEM;
 112         }
 113
 114         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 115
 116         res[0].start    = pci_resource_start(pci, 0);
 117         res[0].end      = pci_resource_end(pci, 0);
 118         res[0].name     = "dwc2";
 119         res[0].flags    = IORESOURCE_MEM;
 120
 121         res[1].start    = pci->irq;
 122         res[1].name     = "dwc2";
 123         res[1].flags    = IORESOURCE_IRQ;
 124
 125         ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
 126         if (ret) {
 127                 dev_err(dev, "couldn't add resources to dwc2 device\n");
 128                 return ret;
 129         }
 130
 131         dwc2->dev.parent = dev;
 132
 133         phy = usb_phy_generic_register();
 134         if (IS_ERR(phy)) {
 135                 dev_err(dev, "error registering generic PHY (%ld)\n",
 136                         PTR_ERR(phy));
 137                 return PTR_ERR(phy);
 138         }
 139
 140         ret = dwc2_pci_quirks(pci, dwc2);
 141         if (ret)
 142                 goto err;
 143
 144         ret = platform_device_add(dwc2);
 145         if (ret) {
 146                 dev_err(dev, "failed to register dwc2 device\n");
 147                 goto err;
 148         }
 149
 150         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
 151         if (!glue)
 152                 return -ENOMEM;
 153
 154         glue->phy = phy;
 155         glue->dwc2 = dwc2;
 156         pci_set_drvdata(pci, glue);
 157
 158         return 0;
 159 err:
 160         usb_phy_generic_unregister(phy);
 161         platform_device_put(dwc2);
 162         return ret;
 163 }
 164
 165 static const struct pci_device_id dwc2_pci_ids[] = {
 166         {
 167                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
 168         },
 169         {
 170                 PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
 171                            PCI_DEVICE_ID_STMICRO_USB_OTG),
 172         },
 173         { /* end: all zeroes */ }
 174 };
 175 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
 176
 177 static struct pci_driver dwc2_pci_driver = {
 178         .name = dwc2_driver_name,
 179         .id_table = dwc2_pci_ids,
 180         .probe = dwc2_pci_probe,
 181         .remove = dwc2_pci_remove,
 182 };
 183
 184 module_pci_driver(dwc2_pci_driver);
 185
 186 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
 187 MODULE_AUTHOR("Synopsys, Inc.");
 188 MODULE_LICENSE("Dual BSD/GPL");