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 <linux/usb/otg.h> 46 #include <linux/usb/nop-usb-xceiv.h> 47 48 /* FIXME define these in <linux/pci_ids.h> */ 49 #define PCI_VENDOR_ID_SYNOPSYS 0x16c3 50 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd 51 52 struct dwc3_pci { 53 struct device *dev; 54 struct platform_device *dwc3; 55 struct platform_device *usb2_phy; 56 struct platform_device *usb3_phy; 57 }; 58 59 static int dwc3_pci_register_phys(struct dwc3_pci *glue) 60 { 61 struct nop_usb_xceiv_platform_data pdata; 62 struct platform_device *pdev; 63 int ret; 64 65 memset(&pdata, 0x00, sizeof(pdata)); 66 67 pdev = platform_device_alloc("nop_usb_xceiv", 0); 68 if (!pdev) 69 return -ENOMEM; 70 71 glue->usb2_phy = pdev; 72 pdata.type = USB_PHY_TYPE_USB2; 73 74 ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata)); 75 if (ret) 76 goto err1; 77 78 pdev = platform_device_alloc("nop_usb_xceiv", 1); 79 if (!pdev) { 80 ret = -ENOMEM; 81 goto err1; 82 } 83 84 glue->usb3_phy = pdev; 85 pdata.type = USB_PHY_TYPE_USB3; 86 87 ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata)); 88 if (ret) 89 goto err2; 90 91 ret = platform_device_add(glue->usb2_phy); 92 if (ret) 93 goto err2; 94 95 ret = platform_device_add(glue->usb3_phy); 96 if (ret) 97 goto err3; 98 99 return 0; 100 101 err3: 102 platform_device_del(glue->usb2_phy); 103 104 err2: 105 platform_device_put(glue->usb3_phy); 106 107 err1: 108 platform_device_put(glue->usb2_phy); 109 110 return ret; 111 } 112 113 static int dwc3_pci_probe(struct pci_dev *pci, 114 const struct pci_device_id *id) 115 { 116 struct resource res[2]; 117 struct platform_device *dwc3; 118 struct dwc3_pci *glue; 119 int ret = -ENOMEM; 120 struct device *dev = &pci->dev; 121 122 glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL); 123 if (!glue) { 124 dev_err(dev, "not enough memory\n"); 125 return -ENOMEM; 126 } 127 128 glue->dev = dev; 129 130 ret = pci_enable_device(pci); 131 if (ret) { 132 dev_err(dev, "failed to enable pci device\n"); 133 return -ENODEV; 134 } 135 136 pci_set_power_state(pci, PCI_D0); 137 pci_set_master(pci); 138 139 ret = dwc3_pci_register_phys(glue); 140 if (ret) { 141 dev_err(dev, "couldn't register PHYs\n"); 142 return ret; 143 } 144 145 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 146 if (!dwc3) { 147 dev_err(dev, "couldn't allocate dwc3 device\n"); 148 ret = -ENOMEM; 149 goto err1; 150 } 151 152 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 153 154 res[0].start = pci_resource_start(pci, 0); 155 res[0].end = pci_resource_end(pci, 0); 156 res[0].name = "dwc_usb3"; 157 res[0].flags = IORESOURCE_MEM; 158 159 res[1].start = pci->irq; 160 res[1].name = "dwc_usb3"; 161 res[1].flags = IORESOURCE_IRQ; 162 163 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); 164 if (ret) { 165 dev_err(dev, "couldn't add resources to dwc3 device\n"); 166 goto err1; 167 } 168 169 pci_set_drvdata(pci, glue); 170 171 dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask); 172 173 dwc3->dev.dma_mask = dev->dma_mask; 174 dwc3->dev.dma_parms = dev->dma_parms; 175 dwc3->dev.parent = dev; 176 glue->dwc3 = dwc3; 177 178 ret = platform_device_add(dwc3); 179 if (ret) { 180 dev_err(dev, "failed to register dwc3 device\n"); 181 goto err3; 182 } 183 184 return 0; 185 186 err3: 187 pci_set_drvdata(pci, NULL); 188 platform_device_put(dwc3); 189 err1: 190 pci_disable_device(pci); 191 192 return ret; 193 } 194 195 static void dwc3_pci_remove(struct pci_dev *pci) 196 { 197 struct dwc3_pci *glue = pci_get_drvdata(pci); 198 199 platform_device_unregister(glue->dwc3); 200 platform_device_unregister(glue->usb2_phy); 201 platform_device_unregister(glue->usb3_phy); 202 pci_set_drvdata(pci, NULL); 203 pci_disable_device(pci); 204 } 205 206 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = { 207 { 208 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 209 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 210 }, 211 { } /* Terminating Entry */ 212 }; 213 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); 214 215 #ifdef CONFIG_PM 216 static int dwc3_pci_suspend(struct device *dev) 217 { 218 struct pci_dev *pci = to_pci_dev(dev); 219 220 pci_disable_device(pci); 221 222 return 0; 223 } 224 225 static int dwc3_pci_resume(struct device *dev) 226 { 227 struct pci_dev *pci = to_pci_dev(dev); 228 int ret; 229 230 ret = pci_enable_device(pci); 231 if (ret) { 232 dev_err(dev, "can't re-enable device --> %d\n", ret); 233 return ret; 234 } 235 236 pci_set_master(pci); 237 238 return 0; 239 } 240 241 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = { 242 SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume) 243 }; 244 245 #define DEV_PM_OPS (&dwc3_pci_dev_pm_ops) 246 #else 247 #define DEV_PM_OPS NULL 248 #endif /* CONFIG_PM */ 249 250 static struct pci_driver dwc3_pci_driver = { 251 .name = "dwc3-pci", 252 .id_table = dwc3_pci_id_table, 253 .probe = dwc3_pci_probe, 254 .remove = dwc3_pci_remove, 255 .driver = { 256 .pm = DEV_PM_OPS, 257 }, 258 }; 259 260 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 261 MODULE_LICENSE("Dual BSD/GPL"); 262 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); 263 264 module_pci_driver(dwc3_pci_driver); 265