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 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
  28 #define PCI_DEVICE_ID_INTEL_BYT         0x0f37
  29 #define PCI_DEVICE_ID_INTEL_MRFLD       0x119e
  30 #define PCI_DEVICE_ID_INTEL_BSW         0x22B7
  31 #define PCI_DEVICE_ID_INTEL_SPTLP       0x9d30
  32 #define PCI_DEVICE_ID_INTEL_SPTH        0xa130
  33
  34 static int dwc3_pci_quirks(struct pci_dev *pdev)
  35 {
  36         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
  37             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
  38                 struct dwc3_platform_data pdata;
  39
  40                 memset(&pdata, 0, sizeof(pdata));
  41
  42                 pdata.has_lpm_erratum = true;
  43                 pdata.lpm_nyet_threshold = 0xf;
  44
  45                 pdata.u2exit_lfps_quirk = true;
  46                 pdata.u2ss_inp3_quirk = true;
  47                 pdata.req_p1p2p3_quirk = true;
  48                 pdata.del_p1p2p3_quirk = true;
  49                 pdata.del_phy_power_chg_quirk = true;
  50                 pdata.lfps_filter_quirk = true;
  51                 pdata.rx_detect_poll_quirk = true;
  52
  53                 pdata.tx_de_emphasis_quirk = true;
  54                 pdata.tx_de_emphasis = 1;
  55
  56                 /*
  57                  * FIXME these quirks should be removed when AMD NL
  58                  * taps out
  59                  */
  60                 pdata.disable_scramble_quirk = true;
  61                 pdata.dis_u3_susphy_quirk = true;
  62                 pdata.dis_u2_susphy_quirk = true;
  63
  64                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
  65                                                 sizeof(pdata));
  66         }
  67
  68         return 0;
  69 }
  70
  71 static int dwc3_pci_probe(struct pci_dev *pci,
  72                 const struct pci_device_id *id)
  73 {
  74         struct resource         res[2];
  75         struct platform_device  *dwc3;
  76         int                     ret;
  77         struct device           *dev = &pci->dev;
  78
  79         ret = pcim_enable_device(pci);
  80         if (ret) {
  81                 dev_err(dev, "failed to enable pci device\n");
  82                 return -ENODEV;
  83         }
  84
  85         pci_set_master(pci);
  86
  87         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
  88         if (!dwc3) {
  89                 dev_err(dev, "couldn't allocate dwc3 device\n");
  90                 return -ENOMEM;
  91         }
  92
  93         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
  94
  95         res[0].start    = pci_resource_start(pci, 0);
  96         res[0].end      = pci_resource_end(pci, 0);
  97         res[0].name     = "dwc_usb3";
  98         res[0].flags    = IORESOURCE_MEM;
  99
 100         res[1].start    = pci->irq;
 101         res[1].name     = "dwc_usb3";
 102         res[1].flags    = IORESOURCE_IRQ;
 103
 104         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 105         if (ret) {
 106                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 107                 return ret;
 108         }
 109
 110         pci_set_drvdata(pci, dwc3);
 111         ret = dwc3_pci_quirks(pci);
 112         if (ret)
 113                 goto err;
 114
 115         dwc3->dev.parent = dev;
 116
 117         ret = platform_device_add(dwc3);
 118         if (ret) {
 119                 dev_err(dev, "failed to register dwc3 device\n");
 120                 goto err;
 121         }
 122
 123         return 0;
 124 err:
 125         platform_device_put(dwc3);
 126         return ret;
 127 }
 128
 129 static void dwc3_pci_remove(struct pci_dev *pci)
 130 {
 131         platform_device_unregister(pci_get_drvdata(pci));
 132 }
 133
 134 static const struct pci_device_id dwc3_pci_id_table[] = {
 135         {
 136                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 137                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 138         },
 139         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 140         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 141         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 142         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
 143         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
 144         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 145         {  }    /* Terminating Entry */
 146 };
 147 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 148
 149 static struct pci_driver dwc3_pci_driver = {
 150         .name           = "dwc3-pci",
 151         .id_table       = dwc3_pci_id_table,
 152         .probe          = dwc3_pci_probe,
 153         .remove         = dwc3_pci_remove,
 154 };
 155
 156 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 157 MODULE_LICENSE("GPL v2");
 158 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 159
 160 module_pci_driver(dwc3_pci_driver);