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); 185