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
  33 struct dwc3_pci {
  34         struct device           *dev;
  35         struct platform_device  *dwc3;
  36         struct platform_device  *usb2_phy;
  37         struct platform_device  *usb3_phy;
  38 };
  39
  40 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
  41 {
  42         struct usb_phy_gen_xceiv_platform_data pdata;
  43         struct platform_device  *pdev;
  44         int                     ret;
  45
  46         memset(&pdata, 0x00, sizeof(pdata));
  47
  48         pdev = platform_device_alloc("usb_phy_gen_xceiv", 0);
  49         if (!pdev)
  50                 return -ENOMEM;
  51
  52         glue->usb2_phy = pdev;
  53         pdata.type = USB_PHY_TYPE_USB2;
  54
  55         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
  56         if (ret)
  57                 goto err1;
  58
  59         pdev = platform_device_alloc("usb_phy_gen_xceiv", 1);
  60         if (!pdev) {
  61                 ret = -ENOMEM;
  62                 goto err1;
  63         }
  64
  65         glue->usb3_phy = pdev;
  66         pdata.type = USB_PHY_TYPE_USB3;
  67
  68         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
  69         if (ret)
  70                 goto err2;
  71
  72         ret = platform_device_add(glue->usb2_phy);
  73         if (ret)
  74                 goto err2;
  75
  76         ret = platform_device_add(glue->usb3_phy);
  77         if (ret)
  78                 goto err3;
  79
  80         return 0;
  81
  82 err3:
  83         platform_device_del(glue->usb2_phy);
  84
  85 err2:
  86         platform_device_put(glue->usb3_phy);
  87
  88 err1:
  89         platform_device_put(glue->usb2_phy);
  90
  91         return ret;
  92 }
  93
  94 static int dwc3_pci_probe(struct pci_dev *pci,
  95                 const struct pci_device_id *id)
  96 {
  97         struct resource         res[2];
  98         struct platform_device  *dwc3;
  99         struct dwc3_pci         *glue;
 100         int                     ret = -ENOMEM;
 101         struct device           *dev = &pci->dev;
 102
 103         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 104         if (!glue) {
 105                 dev_err(dev, "not enough memory\n");
 106                 return -ENOMEM;
 107         }
 108
 109         glue->dev = dev;
 110
 111         ret = pci_enable_device(pci);
 112         if (ret) {
 113                 dev_err(dev, "failed to enable pci device\n");
 114                 return -ENODEV;
 115         }
 116
 117         pci_set_master(pci);
 118
 119         ret = dwc3_pci_register_phys(glue);
 120         if (ret) {
 121                 dev_err(dev, "couldn't register PHYs\n");
 122                 return ret;
 123         }
 124
 125         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 126         if (!dwc3) {
 127                 dev_err(dev, "couldn't allocate dwc3 device\n");
 128                 ret = -ENOMEM;
 129                 goto err1;
 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                 goto err1;
 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 err1:
 169         pci_disable_device(pci);
 170
 171         return ret;
 172 }
 173
 174 static void dwc3_pci_remove(struct pci_dev *pci)
 175 {
 176         struct dwc3_pci *glue = pci_get_drvdata(pci);
 177
 178         platform_device_unregister(glue->dwc3);
 179         platform_device_unregister(glue->usb2_phy);
 180         platform_device_unregister(glue->usb3_phy);
 181         pci_disable_device(pci);
 182 }
 183
 184 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 185         {
 186                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 187                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 188         },
 189         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 190         {  }    /* Terminating Entry */
 191 };
 192 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 193
 194 #ifdef CONFIG_PM_SLEEP
 195 static int dwc3_pci_suspend(struct device *dev)
 196 {
 197         struct pci_dev  *pci = to_pci_dev(dev);
 198
 199         pci_disable_device(pci);
 200
 201         return 0;
 202 }
 203
 204 static int dwc3_pci_resume(struct device *dev)
 205 {
 206         struct pci_dev  *pci = to_pci_dev(dev);
 207         int             ret;
 208
 209         ret = pci_enable_device(pci);
 210         if (ret) {
 211                 dev_err(dev, "can't re-enable device --> %d\n", ret);
 212                 return ret;
 213         }
 214
 215         pci_set_master(pci);
 216
 217         return 0;
 218 }
 219 #endif /* CONFIG_PM_SLEEP */
 220
 221 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 222         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 223 };
 224
 225 static struct pci_driver dwc3_pci_driver = {
 226         .name           = "dwc3-pci",
 227         .id_table       = dwc3_pci_id_table,
 228         .probe          = dwc3_pci_probe,
 229         .remove         = dwc3_pci_remove,
 230         .driver         = {
 231                 .pm     = &dwc3_pci_dev_pm_ops,
 232         },
 233 };
 234
 235 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 236 MODULE_LICENSE("GPL v2");
 237 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 238
 239 module_pci_driver(dwc3_pci_driver);