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_gen_xceiv.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
  34 struct dwc3_pci {
  35         struct device           *dev;
  36         struct platform_device  *dwc3;
  37         struct platform_device  *usb2_phy;
  38         struct platform_device  *usb3_phy;
  39 };
  40
  41 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
  42 {
  43         struct usb_phy_gen_xceiv_platform_data pdata;
  44         struct platform_device  *pdev;
  45         int                     ret;
  46
  47         memset(&pdata, 0x00, sizeof(pdata));
  48
  49         pdev = platform_device_alloc("usb_phy_gen_xceiv", 0);
  50         if (!pdev)
  51                 return -ENOMEM;
  52
  53         glue->usb2_phy = pdev;
  54         pdata.type = USB_PHY_TYPE_USB2;
  55
  56         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
  57         if (ret)
  58                 goto err1;
  59
  60         pdev = platform_device_alloc("usb_phy_gen_xceiv", 1);
  61         if (!pdev) {
  62                 ret = -ENOMEM;
  63                 goto err1;
  64         }
  65
  66         glue->usb3_phy = pdev;
  67         pdata.type = USB_PHY_TYPE_USB3;
  68
  69         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
  70         if (ret)
  71                 goto err2;
  72
  73         ret = platform_device_add(glue->usb2_phy);
  74         if (ret)
  75                 goto err2;
  76
  77         ret = platform_device_add(glue->usb3_phy);
  78         if (ret)
  79                 goto err3;
  80
  81         return 0;
  82
  83 err3:
  84         platform_device_del(glue->usb2_phy);
  85
  86 err2:
  87         platform_device_put(glue->usb3_phy);
  88
  89 err1:
  90         platform_device_put(glue->usb2_phy);
  91
  92         return ret;
  93 }
  94
  95 static int dwc3_pci_probe(struct pci_dev *pci,
  96                 const struct pci_device_id *id)
  97 {
  98         struct resource         res[2];
  99         struct platform_device  *dwc3;
 100         struct dwc3_pci         *glue;
 101         int                     ret = -ENOMEM;
 102         struct device           *dev = &pci->dev;
 103
 104         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 105         if (!glue) {
 106                 dev_err(dev, "not enough memory\n");
 107                 return -ENOMEM;
 108         }
 109
 110         glue->dev = dev;
 111
 112         ret = pci_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                 ret = -ENOMEM;
 130                 goto err1;
 131         }
 132
 133         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 134
 135         res[0].start    = pci_resource_start(pci, 0);
 136         res[0].end      = pci_resource_end(pci, 0);
 137         res[0].name     = "dwc_usb3";
 138         res[0].flags    = IORESOURCE_MEM;
 139
 140         res[1].start    = pci->irq;
 141         res[1].name     = "dwc_usb3";
 142         res[1].flags    = IORESOURCE_IRQ;
 143
 144         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 145         if (ret) {
 146                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 147                 goto err1;
 148         }
 149
 150         pci_set_drvdata(pci, glue);
 151
 152         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
 153
 154         dwc3->dev.dma_mask = dev->dma_mask;
 155         dwc3->dev.dma_parms = dev->dma_parms;
 156         dwc3->dev.parent = dev;
 157         glue->dwc3 = dwc3;
 158
 159         ret = platform_device_add(dwc3);
 160         if (ret) {
 161                 dev_err(dev, "failed to register dwc3 device\n");
 162                 goto err3;
 163         }
 164
 165         return 0;
 166
 167 err3:
 168         platform_device_put(dwc3);
 169 err1:
 170         pci_disable_device(pci);
 171
 172         return ret;
 173 }
 174
 175 static void dwc3_pci_remove(struct pci_dev *pci)
 176 {
 177         struct dwc3_pci *glue = pci_get_drvdata(pci);
 178
 179         platform_device_unregister(glue->dwc3);
 180         platform_device_unregister(glue->usb2_phy);
 181         platform_device_unregister(glue->usb3_phy);
 182         pci_disable_device(pci);
 183 }
 184
 185 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 186         {
 187                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 188                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 189         },
 190         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 191         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 192         {  }    /* Terminating Entry */
 193 };
 194 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 195
 196 #ifdef CONFIG_PM_SLEEP
 197 static int dwc3_pci_suspend(struct device *dev)
 198 {
 199         struct pci_dev  *pci = to_pci_dev(dev);
 200
 201         pci_disable_device(pci);
 202
 203         return 0;
 204 }
 205
 206 static int dwc3_pci_resume(struct device *dev)
 207 {
 208         struct pci_dev  *pci = to_pci_dev(dev);
 209         int             ret;
 210
 211         ret = pci_enable_device(pci);
 212         if (ret) {
 213                 dev_err(dev, "can't re-enable device --> %d\n", ret);
 214                 return ret;
 215         }
 216
 217         pci_set_master(pci);
 218
 219         return 0;
 220 }
 221 #endif /* CONFIG_PM_SLEEP */
 222
 223 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 224         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 225 };
 226
 227 static struct pci_driver dwc3_pci_driver = {
 228         .name           = "dwc3-pci",
 229         .id_table       = dwc3_pci_id_table,
 230         .probe          = dwc3_pci_probe,
 231         .remove         = dwc3_pci_remove,
 232         .driver         = {
 233                 .pm     = &dwc3_pci_dev_pm_ops,
 234         },
 235 };
 236
 237 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 238 MODULE_LICENSE("GPL v2");
 239 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 240
 241 module_pci_driver(dwc3_pci_driver);