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  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions, and the following disclaimer,
  14  *    without modification.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The names of the above-listed copyright holders may not be used
  19  *    to endorse or promote products derived from this software without
  20  *    specific prior written permission.
  21  *
  22  * ALTERNATIVELY, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2, as published by the Free
  24  * Software Foundation.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  27  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  28  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  30  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  31  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  32  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  33  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  34  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  35  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #include <linux/kernel.h>
  40 #include <linux/module.h>
  41 #include <linux/slab.h>
  42 #include <linux/pci.h>
  43 #include <linux/platform_device.h>
  44
  45 #include "core.h"
  46
  47 /* FIXME define these in <linux/pci_ids.h> */
  48 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
  49 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
  50
  51 struct dwc3_pci {
  52         struct device           *dev;
  53         struct platform_device  *dwc3;
  54 };
  55
  56 static int __devinit dwc3_pci_probe(struct pci_dev *pci,
  57                 const struct pci_device_id *id)
  58 {
  59         struct resource         res[2];
  60         struct platform_device  *dwc3;
  61         struct dwc3_pci         *glue;
  62         int                     ret = -ENOMEM;
  63         int                     devid;
  64         struct device           *dev = &pci->dev;
  65
  66         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
  67         if (!glue) {
  68                 dev_err(dev, "not enough memory\n");
  69                 return -ENOMEM;
  70         }
  71
  72         glue->dev = dev;
  73
  74         ret = pci_enable_device(pci);
  75         if (ret) {
  76                 dev_err(dev, "failed to enable pci device\n");
  77                 return -ENODEV;
  78         }
  79
  80         pci_set_power_state(pci, PCI_D0);
  81         pci_set_master(pci);
  82
  83         devid = dwc3_get_device_id();
  84         if (devid < 0) {
  85                 ret = -ENOMEM;
  86                 goto err1;
  87         }
  88
  89         dwc3 = platform_device_alloc("dwc3", devid);
  90         if (!dwc3) {
  91                 dev_err(dev, "couldn't allocate dwc3 device\n");
  92                 ret = -ENOMEM;
  93                 goto err1;
  94         }
  95
  96         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
  97
  98         res[0].start    = pci_resource_start(pci, 0);
  99         res[0].end      = pci_resource_end(pci, 0);
 100         res[0].name     = "dwc_usb3";
 101         res[0].flags    = IORESOURCE_MEM;
 102
 103         res[1].start    = pci->irq;
 104         res[1].name     = "dwc_usb3";
 105         res[1].flags    = IORESOURCE_IRQ;
 106
 107         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 108         if (ret) {
 109                 dev_err(dev, "couldn't add resources to dwc3 device\n");
 110                 goto err2;
 111         }
 112
 113         pci_set_drvdata(pci, glue);
 114
 115         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
 116
 117         dwc3->dev.dma_mask = dev->dma_mask;
 118         dwc3->dev.dma_parms = dev->dma_parms;
 119         dwc3->dev.parent = dev;
 120         glue->dwc3 = dwc3;
 121
 122         ret = platform_device_add(dwc3);
 123         if (ret) {
 124                 dev_err(dev, "failed to register dwc3 device\n");
 125                 goto err3;
 126         }
 127
 128         return 0;
 129
 130 err3:
 131         pci_set_drvdata(pci, NULL);
 132         platform_device_put(dwc3);
 133
 134 err2:
 135         dwc3_put_device_id(devid);
 136
 137 err1:
 138         pci_disable_device(pci);
 139
 140         return ret;
 141 }
 142
 143 static void __devexit dwc3_pci_remove(struct pci_dev *pci)
 144 {
 145         struct dwc3_pci *glue = pci_get_drvdata(pci);
 146
 147         dwc3_put_device_id(glue->dwc3->id);
 148         platform_device_unregister(glue->dwc3);
 149         pci_set_drvdata(pci, NULL);
 150         pci_disable_device(pci);
 151 }
 152
 153 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 154         {
 155                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 156                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 157         },
 158         {  }    /* Terminating Entry */
 159 };
 160 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 161
 162 static struct pci_driver dwc3_pci_driver = {
 163         .name           = "dwc3-pci",
 164         .id_table       = dwc3_pci_id_table,
 165         .probe          = dwc3_pci_probe,
 166         .remove         = __devexit_p(dwc3_pci_remove),
 167 };
 168
 169 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 170 MODULE_LICENSE("Dual BSD/GPL");
 171 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 172
 173 module_pci_driver(dwc3_pci_driver);