linux/drivers/usb/dwc2/pci.c
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   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
  59static const char dwc2_driver_name[] = "dwc2-pci";
  60
  61struct dwc2_pci_glue {
  62        struct platform_device *dwc2;
  63        struct platform_device *phy;
  64};
  65
  66/**
  67 * dwc2_pci_remove() - Provides the cleanup entry points for the DWC_otg PCI
  68 * driver
  69 *
  70 * @pci: The programming view of DWC_otg PCI
  71 */
  72static void dwc2_pci_remove(struct pci_dev *pci)
  73{
  74        struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
  75
  76        platform_device_unregister(glue->dwc2);
  77        usb_phy_generic_unregister(glue->phy);
  78        pci_set_drvdata(pci, NULL);
  79}
  80
  81static int dwc2_pci_probe(struct pci_dev *pci,
  82                          const struct pci_device_id *id)
  83{
  84        struct resource         res[2];
  85        struct platform_device  *dwc2;
  86        struct platform_device  *phy;
  87        int                     ret;
  88        struct device           *dev = &pci->dev;
  89        struct dwc2_pci_glue    *glue;
  90
  91        ret = pcim_enable_device(pci);
  92        if (ret) {
  93                dev_err(dev, "failed to enable pci device\n");
  94                return -ENODEV;
  95        }
  96
  97        pci_set_master(pci);
  98
  99        phy = usb_phy_generic_register();
 100        if (IS_ERR(phy)) {
 101                dev_err(dev, "error registering generic PHY (%ld)\n",
 102                        PTR_ERR(phy));
 103                return PTR_ERR(phy);
 104        }
 105
 106        dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
 107        if (!dwc2) {
 108                dev_err(dev, "couldn't allocate dwc2 device\n");
 109                ret = -ENOMEM;
 110                goto err;
 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                goto err;
 128        }
 129
 130        dwc2->dev.parent = dev;
 131
 132        glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 133        if (!glue) {
 134                ret = -ENOMEM;
 135                goto err;
 136        }
 137
 138        ret = platform_device_add(dwc2);
 139        if (ret) {
 140                dev_err(dev, "failed to register dwc2 device\n");
 141                goto err;
 142        }
 143
 144        glue->phy = phy;
 145        glue->dwc2 = dwc2;
 146        pci_set_drvdata(pci, glue);
 147
 148        return 0;
 149err:
 150        usb_phy_generic_unregister(phy);
 151        platform_device_put(dwc2);
 152        return ret;
 153}
 154
 155static const struct pci_device_id dwc2_pci_ids[] = {
 156        {
 157                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
 158        },
 159        {
 160                PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
 161                           PCI_DEVICE_ID_STMICRO_USB_OTG),
 162        },
 163        { /* end: all zeroes */ }
 164};
 165MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
 166
 167static struct pci_driver dwc2_pci_driver = {
 168        .name = dwc2_driver_name,
 169        .id_table = dwc2_pci_ids,
 170        .probe = dwc2_pci_probe,
 171        .remove = dwc2_pci_remove,
 172};
 173
 174module_pci_driver(dwc2_pci_driver);
 175
 176MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
 177MODULE_AUTHOR("Synopsys, Inc.");
 178MODULE_LICENSE("Dual BSD/GPL");
 179