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
  65         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
  66         if (!glue) {
  67                 dev_err(&pci->dev, "not enough memory\n");
  68                 goto err0;
  69         }
  70
  71         glue->dev       = &pci->dev;
  72
  73         ret = pci_enable_device(pci);
  74         if (ret) {
  75                 dev_err(&pci->dev, "failed to enable pci device\n");
  76                 goto err1;
  77         }
  78
  79         pci_set_power_state(pci, PCI_D0);
  80         pci_set_master(pci);
  81
  82         devid = dwc3_get_device_id();
  83         if (devid < 0)
  84                 goto err2;
  85
  86         dwc3 = platform_device_alloc("dwc3", devid);
  87         if (!dwc3) {
  88                 dev_err(&pci->dev, "couldn't allocate dwc3 device\n");
  89                 goto err3;
  90         }
  91
  92         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
  93
  94         res[0].start    = pci_resource_start(pci, 0);
  95         res[0].end      = pci_resource_end(pci, 0);
  96         res[0].name     = "dwc_usb3";
  97         res[0].flags    = IORESOURCE_MEM;
  98
  99         res[1].start    = pci->irq;
 100         res[1].name     = "dwc_usb3";
 101         res[1].flags    = IORESOURCE_IRQ;
 102
 103         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
 104         if (ret) {
 105                 dev_err(&pci->dev, "couldn't add resources to dwc3 device\n");
 106                 goto err4;
 107         }
 108
 109         pci_set_drvdata(pci, glue);
 110
 111         dma_set_coherent_mask(&dwc3->dev, pci->dev.coherent_dma_mask);
 112
 113         dwc3->dev.dma_mask = pci->dev.dma_mask;
 114         dwc3->dev.dma_parms = pci->dev.dma_parms;
 115         dwc3->dev.parent = &pci->dev;
 116         glue->dwc3      = dwc3;
 117
 118         ret = platform_device_add(dwc3);
 119         if (ret) {
 120                 dev_err(&pci->dev, "failed to register dwc3 device\n");
 121                 goto err4;
 122         }
 123
 124         return 0;
 125
 126 err4:
 127         pci_set_drvdata(pci, NULL);
 128         platform_device_put(dwc3);
 129
 130 err3:
 131         dwc3_put_device_id(devid);
 132
 133 err2:
 134         pci_disable_device(pci);
 135
 136 err1:
 137         kfree(glue);
 138
 139 err0:
 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         kfree(glue);
 152 }
 153
 154 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 155         {
 156                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
 157                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
 158         },
 159         {  }    /* Terminating Entry */
 160 };
 161 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 162
 163 static struct pci_driver dwc3_pci_driver = {
 164         .name           = "dwc3-pci",
 165         .id_table       = dwc3_pci_id_table,
 166         .probe          = dwc3_pci_probe,
 167         .remove         = __devexit_p(dwc3_pci_remove),
 168 };
 169
 170 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 171 MODULE_LICENSE("Dual BSD/GPL");
 172 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
 173
 174 static int __devinit dwc3_pci_init(void)
 175 {
 176         return pci_register_driver(&dwc3_pci_driver);
 177 }
 178 module_init(dwc3_pci_init);
 179
 180 static void __exit dwc3_pci_exit(void)
 181 {
 182         pci_unregister_driver(&dwc3_pci_driver);
 183 }
 184 module_exit(dwc3_pci_exit);