LXR linux/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
  58static const char dwc2_driver_name[] = "dwc2-pci";
  59
  60struct dwc2_pci_glue {
  61        struct platform_device *dwc2;
  62        struct platform_device *phy;
  63};
  64
  65static 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
  75static 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;
 140err:
 141        usb_phy_generic_unregister(phy);
 142        platform_device_put(dwc2);
 143        return ret;
 144}
 145
 146static 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};
 156MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
 157
 158static 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
 165module_pci_driver(dwc2_pci_driver);
 166
 167MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
 168MODULE_AUTHOR("Synopsys, Inc.");
 169MODULE_LICENSE("Dual BSD/GPL");
 170