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 <linux/usb/otg.h>
  26 #include <linux/usb/usb_phy_generic.h>
  27
  28 #include "platform_data.h"
  29
  30 /* FIXME define these in <linux/pci_ids.h> */
  31 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
  32 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
  33 #define PCI_DEVICE_ID_INTEL_BYT         0x0f37
  34 #define PCI_DEVICE_ID_INTEL_MRFLD       0x119e
  35 #define PCI_DEVICE_ID_INTEL_BSW         0x22B7
  36
  37 struct dwc3_pci {
  38         struct device           *dev;
  39         struct platform_device  *dwc3;
  40         struct platform_device  *usb2_phy;
  41         struct platform_device  *usb3_phy;
  42 };
  43
  44 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
  45 {
  46         struct usb_phy_generic_platform_data pdata;
  47         struct platform_device  *pdev;
  48         int                     ret;
  49
  50         memset(&pdata, 0x00, sizeof(pdata));
  51
  52         pdev = platform_device_alloc("usb_phy_generic", 0);
  53         if (!pdev)
  54                 return -ENOMEM;
  55
  56         glue->usb2_phy = pdev;
  57         pdata.type = USB_PHY_TYPE_USB2;
  58         pdata.gpio_reset = -1;
  59
  60         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
  61         if (ret)
  62                 goto err1;
  63
  64         pdev = platform_device_alloc("usb_phy_generic", 1);
  65         if (!pdev) {
  66                 ret = -ENOMEM;
  67                 goto err1;
  68         }
  69
  70         glue->usb3_phy = pdev;
  71         pdata.type = USB_PHY_TYPE_USB3;
  72
  73         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
  74         if (ret)
  75                 goto err2;
  76
  77         ret = platform_device_add(glue->usb2_phy);
  78         if (ret)
  79                 goto err2;
  80
  81         ret = platform_device_add(glue->usb3_phy);
  82         if (ret)
  83                 goto err3;
  84
  85         return 0;
  86
  87 err3:
  88         platform_device_del(glue->usb2_phy);
  89
  90 err2:
  91         platform_device_put(glue->usb3_phy);
  92
  93 err1:
  94         platform_device_put(glue->usb2_phy);
  95
  96         return ret;
  97 }
  98
  99 static int dwc3_pci_probe(struct pci_dev *pci,
 100                 const struct pci_device_id *id)
 101 {
 102         struct resource         res[2];
 103         struct platform_device  *dwc3;
 104         struct dwc3_pci         *glue;
 105         int                     ret;
 106         struct device           *dev = &pci->dev;
 107         struct dwc3_platform_data dwc3_pdata;
 108
 109         memset(&dwc3_pdata, 0x00, sizeof(dwc3_pdata));
 110
 111         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 112         if (!glue)
 113                 return -ENOMEM;
 114
 115         glue->dev = dev;
 116
 117         ret = pcim_enable_device(pci);
 118         if (ret) {
 119                 dev_err(dev, "failed to enable pci device\n");
 120                 return -ENODEV;
 121         }
 122
 123         pci_set_master(pci);
 124
 125         ret = dwc3_pci_register_phys(glue);
 126         if (ret) {
 127                 dev_err(dev, "couldn't register PHYs\n");
 128                 return ret;
 129         }
 130
 131         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 132         if (!dwc3) {
 133                 dev_err(dev, "couldn't allocate dwc3 device\n");
 134                 return -ENOMEM;
 135         }
 136
 137         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 138
 139         res[0].start    = pci_resource_start(pci, 0);
 140         res[0].end      = pci_resource_end(pci, 0);
 141         res[0].name     = "dwc_usb3";
 142         res[0].flags    = IORESOURCE_MEM;
 143
 144         res[1].start    = pci->irq;
 145         res[1].name     = "dwc_usb3";
 146         res[1].flags    = IORESOURCE_IRQ;
 147
 148         if (pci->vendor == PCI_VENDOR_ID_AMD &&
 149                         pci->device == PCI_DEVICE_ID_AMD_NL_USB) {
 150                 dwc3_pdata.has_lpm_erratum = true;
 151                 dwc3_pdata.lpm_nyet_threshold = 0xf;
 152
 153                 dwc3_pdata.u2exit_lfps_quirk = true;
 154                 dwc3_pdata.u2ss_inp3_quirk = true;
 155                 dwc3_pdata.req_p1p2p3_quirk = true;
 156                 dwc3_pdata.del_p1p2p3_quirk = true;
 157                 dwc3_pdata.del_phy_power_chg_quirk = true;
 158                 dwc3_pdata.lfps_filter_quirk = true;
 159                 dwc3_pdata.rx_detect_poll_quirk = true;
 160
 161                 dwc3_pdata.tx_de_emphasis_quirk = true;
 162                 dwc3_pdata.tx_de_emphasis = 1;
 163
 164                 /*
 165                  * FIXME these quirks should be removed when AMD NL
 166                  * taps out
 167                  */
 168                 dwc3_pdata.disable_scramble_quirk = true;
 169                 dwc3_pdata.dis_u3_susphy_quirk = true;
 170                 dwc3_pdata.dis_u2_susphy_quirk = true;
 171         }
 172
 173         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 174         if (ret) {
 175                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 176                 return ret;
 177         }
 178
 179         pci_set_drvdata(pci, glue);
 180
 181         ret = platform_device_add_data(dwc3, &dwc3_pdata, sizeof(dwc3_pdata));
 182         if (ret)
 183                 goto err3;
 184
 185         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
 186
 187         dwc3->dev.dma_mask = dev->dma_mask;
 188         dwc3->dev.dma_parms = dev->dma_parms;
 189         dwc3->dev.parent = dev;
 190         glue->dwc3 = dwc3;
 191
 192         ret = platform_device_add(dwc3);
 193         if (ret) {
 194                 dev_err(dev, "failed to register dwc3 device\n");
 195                 goto err3;
 196         }
 197
 198         return 0;
 199
 200 err3:
 201         platform_device_put(dwc3);
 202         return ret;
 203 }
 204
 205 static void dwc3_pci_remove(struct pci_dev *pci)
 206 {
 207         struct dwc3_pci *glue = pci_get_drvdata(pci);
 208
 209         platform_device_unregister(glue->dwc3);
 210         platform_device_unregister(glue->usb2_phy);
 211         platform_device_unregister(glue->usb3_phy);
 212 }
 213
 214 static const struct pci_device_id dwc3_pci_id_table[] = {
 215         {
 216                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 217                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 218         },
 219         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
 220         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 221         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 222         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 223         {  }    /* Terminating Entry */
 224 };
 225 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 226
 227 #ifdef CONFIG_PM_SLEEP
 228 static int dwc3_pci_suspend(struct device *dev)
 229 {
 230         struct pci_dev  *pci = to_pci_dev(dev);
 231
 232         pci_disable_device(pci);
 233
 234         return 0;
 235 }
 236
 237 static int dwc3_pci_resume(struct device *dev)
 238 {
 239         struct pci_dev  *pci = to_pci_dev(dev);
 240         int             ret;
 241
 242         ret = pci_enable_device(pci);
 243         if (ret) {
 244                 dev_err(dev, "can't re-enable device --> %d\n", ret);
 245                 return ret;
 246         }
 247
 248         pci_set_master(pci);
 249
 250         return 0;
 251 }
 252 #endif /* CONFIG_PM_SLEEP */
 253
 254 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 255         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 256 };
 257
 258 static struct pci_driver dwc3_pci_driver = {
 259         .name           = "dwc3-pci",
 260         .id_table       = dwc3_pci_id_table,
 261         .probe          = dwc3_pci_probe,
 262         .remove         = dwc3_pci_remove,
 263         .driver         = {
 264                 .pm     = &dwc3_pci_dev_pm_ops,
 265         },
 266 };
 267
 268 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 269 MODULE_LICENSE("GPL v2");
 270 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 271
 272 module_pci_driver(dwc3_pci_driver);