drivers/usb/dwc3/dwc3-pci.c

   1 /**
   2  * dwc3-pci.c - PCI Specific glue layer
   3  *
   4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
   5  *
   6  * Authors: Felipe Balbi <balbi@ti.com>,
   7  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   8  *
   9  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2  of
  11  * the License as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/slab.h>
  22 #include <linux/pci.h>
  23 #include <linux/platform_device.h>
  24
  25 #include "platform_data.h"
  26
  27 /* FIXME define these in <linux/pci_ids.h> */
  28 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
  29 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
  30 #define PCI_DEVICE_ID_INTEL_BYT         0x0f37
  31 #define PCI_DEVICE_ID_INTEL_MRFLD       0x119e
  32 #define PCI_DEVICE_ID_INTEL_BSW         0x22B7
  33 #define PCI_DEVICE_ID_INTEL_SPTLP       0x9d30
  34 #define PCI_DEVICE_ID_INTEL_SPTH        0xa130
  35
  36 static int dwc3_pci_quirks(struct pci_dev *pdev)
  37 {
  38         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  39             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  40                 struct dwc3_platform_data pdata;
  41
  42                 memset(&pdata, 0, sizeof(pdata));
  43
  44                 pdata.has_lpm_erratum = true;
  45                 pdata.lpm_nyet_threshold = 0xf;
  46
  47                 pdata.u2exit_lfps_quirk = true;
  48                 pdata.u2ss_inp3_quirk = true;
  49                 pdata.req_p1p2p3_quirk = true;
  50                 pdata.del_p1p2p3_quirk = true;
  51                 pdata.del_phy_power_chg_quirk = true;
  52                 pdata.lfps_filter_quirk = true;
  53                 pdata.rx_detect_poll_quirk = true;
  54
  55                 pdata.tx_de_emphasis_quirk = true;
  56                 pdata.tx_de_emphasis = 1;
  57
  58                 /*
  59                  * FIXME these quirks should be removed when AMD NL
  60                  * taps out
  61                  */
  62                 pdata.disable_scramble_quirk = true;
  63                 pdata.dis_u3_susphy_quirk = true;
  64                 pdata.dis_u2_susphy_quirk = true;
  65
  66                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
  67                                                 sizeof(pdata));
  68         }
  69
  70         return 0;
  71 }
  72
  73 static int dwc3_pci_probe(struct pci_dev *pci,
  74                 const struct pci_device_id *id)
  75 {
  76         struct resource         res[2];
  77         struct platform_device  *dwc3;
  78         int                     ret;
  79         struct device           *dev = &pci->dev;
  80
  81         ret = pcim_enable_device(pci);
  82         if (ret) {
  83                 dev_err(dev, "failed to enable pci device\n");
  84                 return -ENODEV;
  85         }
  86
  87         pci_set_master(pci);
  88
  89         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
  90         if (!dwc3) {
  91                 dev_err(dev, "couldn't allocate dwc3 device\n");
  92                 return -ENOMEM;
  93         }
  94
  95         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
  96
  97         res[0].start    = pci_resource_start(pci, 0);
  98         res[0].end      = pci_resource_end(pci, 0);
  99         res[0].name     = "dwc_usb3";
 100         res[0].flags    = IORESOURCE_MEM;
 101
 102         res[1].start    = pci->irq;
 103         res[1].name     = "dwc_usb3";
 104         res[1].flags    = IORESOURCE_IRQ;
 105
 106         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 107         if (ret) {
 108                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 109                 return ret;
 110         }
 111
 112         pci_set_drvdata(pci, dwc3);
 113         ret = dwc3_pci_quirks(pci);
 114         if (ret)
 115                 goto err;
 116
 117         dwc3->dev.parent = dev;
 118
 119         ret = platform_device_add(dwc3);
 120         if (ret) {
 121                 dev_err(dev, "failed to register dwc3 device\n");
 122                 goto err;
 123         }
 124
 125         return 0;
 126 err:
 127         platform_device_put(dwc3);
 128         return ret;
 129 }
 130
 131 static void dwc3_pci_remove(struct pci_dev *pci)
 132 {
 133         platform_device_unregister(pci_get_drvdata(pci));
 134 }
 135
 136 static const struct pci_device_id dwc3_pci_id_table[] = {
 137         {
 138                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 139                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 140         },
 141         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 142         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 143         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 144         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 145         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 146         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 147         {  }    /* Terminating Entry */
 148 };
 149 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 150
 151 static struct pci_driver dwc3_pci_driver = {
 152         .name           = "dwc3-pci",
 153         .id_table       = dwc3_pci_id_table,
 154         .probe          = dwc3_pci_probe,
 155         .remove         = dwc3_pci_remove,
 156 };
 157
 158 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 159 MODULE_LICENSE("GPL v2");
 160 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 161
 162 module_pci_driver(dwc3_pci_driver);