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         pdata.gpio_reset = -1;
  56
  57         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
  58         if (ret)
  59                 goto err1;
  60
  61         pdev = platform_device_alloc("usb_phy_gen_xceiv", 1);
  62         if (!pdev) {
  63                 ret = -ENOMEM;
  64                 goto err1;
  65         }
  66
  67         glue->usb3_phy = pdev;
  68         pdata.type = USB_PHY_TYPE_USB3;
  69
  70         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
  71         if (ret)
  72                 goto err2;
  73
  74         ret = platform_device_add(glue->usb2_phy);
  75         if (ret)
  76                 goto err2;
  77
  78         ret = platform_device_add(glue->usb3_phy);
  79         if (ret)
  80                 goto err3;
  81
  82         return 0;
  83
  84 err3:
  85         platform_device_del(glue->usb2_phy);
  86
  87 err2:
  88         platform_device_put(glue->usb3_phy);
  89
  90 err1:
  91         platform_device_put(glue->usb2_phy);
  92
  93         return ret;
  94 }
  95
  96 static int dwc3_pci_probe(struct pci_dev *pci,
  97                 const struct pci_device_id *id)
  98 {
  99         struct resource         res[2];
 100         struct platform_device  *dwc3;
 101         struct dwc3_pci         *glue;
 102         int                     ret = -ENOMEM;
 103         struct device           *dev = &pci->dev;
 104
 105         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 106         if (!glue) {
 107                 dev_err(dev, "not enough memory\n");
 108                 return -ENOMEM;
 109         }
 110
 111         glue->dev = dev;
 112
 113         ret = pci_enable_device(pci);
 114         if (ret) {
 115                 dev_err(dev, "failed to enable pci device\n");
 116                 return -ENODEV;
 117         }
 118
 119         pci_set_master(pci);
 120
 121         ret = dwc3_pci_register_phys(glue);
 122         if (ret) {
 123                 dev_err(dev, "couldn't register PHYs\n");
 124                 return ret;
 125         }
 126
 127         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 128         if (!dwc3) {
 129                 dev_err(dev, "couldn't allocate dwc3 device\n");
 130                 ret = -ENOMEM;
 131                 goto err1;
 132         }
 133
 134         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 135
 136         res[0].start    = pci_resource_start(pci, 0);
 137         res[0].end      = pci_resource_end(pci, 0);
 138         res[0].name     = "dwc_usb3";
 139         res[0].flags    = IORESOURCE_MEM;
 140
 141         res[1].start    = pci->irq;
 142         res[1].name     = "dwc_usb3";
 143         res[1].flags    = IORESOURCE_IRQ;
 144
 145         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 146         if (ret) {
 147                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 148                 goto err1;
 149         }
 150
 151         pci_set_drvdata(pci, glue);
 152
 153         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
 154
 155         dwc3->dev.dma_mask = dev->dma_mask;
 156         dwc3->dev.dma_parms = dev->dma_parms;
 157         dwc3->dev.parent = dev;
 158         glue->dwc3 = dwc3;
 159
 160         ret = platform_device_add(dwc3);
 161         if (ret) {
 162                 dev_err(dev, "failed to register dwc3 device\n");
 163                 goto err3;
 164         }
 165
 166         return 0;
 167
 168 err3:
 169         platform_device_put(dwc3);
 170 err1:
 171         pci_disable_device(pci);
 172
 173         return ret;
 174 }
 175
 176 static void dwc3_pci_remove(struct pci_dev *pci)
 177 {
 178         struct dwc3_pci *glue = pci_get_drvdata(pci);
 179
 180         platform_device_unregister(glue->dwc3);
 181         platform_device_unregister(glue->usb2_phy);
 182         platform_device_unregister(glue->usb3_phy);
 183         pci_disable_device(pci);
 184 }
 185
 186 static const struct pci_device_id dwc3_pci_id_table[] = {
 187         {
 188                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 189                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 190         },
 191         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
 192         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
 193         {  }    /* Terminating Entry */
 194 };
 195 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 196
 197 #ifdef CONFIG_PM_SLEEP
 198 static int dwc3_pci_suspend(struct device *dev)
 199 {
 200         struct pci_dev  *pci = to_pci_dev(dev);
 201
 202         pci_disable_device(pci);
 203
 204         return 0;
 205 }
 206
 207 static int dwc3_pci_resume(struct device *dev)
 208 {
 209         struct pci_dev  *pci = to_pci_dev(dev);
 210         int             ret;
 211
 212         ret = pci_enable_device(pci);
 213         if (ret) {
 214                 dev_err(dev, "can't re-enable device --> %d\n", ret);
 215                 return ret;
 216         }
 217
 218         pci_set_master(pci);
 219
 220         return 0;
 221 }
 222 #endif /* CONFIG_PM_SLEEP */
 223
 224 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
 225         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
 226 };
 227
 228 static struct pci_driver dwc3_pci_driver = {
 229         .name           = "dwc3-pci",
 230         .id_table       = dwc3_pci_id_table,
 231         .probe          = dwc3_pci_probe,
 232         .remove         = dwc3_pci_remove,
 233         .driver         = {
 234                 .pm     = &dwc3_pci_dev_pm_ops,
 235         },
 236 };
 237
 238 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 239 MODULE_LICENSE("GPL v2");
 240 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 241
 242 module_pci_driver(dwc3_pci_driver);