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