1 /* 2 * pci.c - DesignWare HS OTG Controller PCI driver 3 * 4 * Copyright (C) 2004-2013 Synopsys, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions, and the following disclaimer, 11 * without modification. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The names of the above-listed copyright holders may not be used 16 * to endorse or promote products derived from this software without 17 * specific prior written permission. 18 * 19 * ALTERNATIVELY, this software may be distributed under the terms of the 20 * GNU General Public License ("GPL") as published by the Free Software 21 * Foundation; either version 2 of the License, or (at your option) any 22 * later version. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 26 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 28 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* 38 * Provides the initialization and cleanup entry points for the DWC_otg PCI 39 * driver 40 */ 41 #include <linux/kernel.h> 42 #include <linux/module.h> 43 #include <linux/moduleparam.h> 44 #include <linux/spinlock.h> 45 #include <linux/interrupt.h> 46 #include <linux/io.h> 47 #include <linux/slab.h> 48 #include <linux/pci.h> 49 #include <linux/usb.h> 50 51 #include <linux/usb/hcd.h> 52 #include <linux/usb/ch11.h> 53 #include <linux/platform_device.h> 54 #include <linux/usb/usb_phy_generic.h> 55 56 #define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0 57 58 static const char dwc2_driver_name[] = "dwc2-pci"; 59 60 struct dwc2_pci_glue { 61 struct platform_device *dwc2; 62 struct platform_device *phy; 63 }; 64 65 static int dwc2_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc2) 66 { 67 if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS && 68 pdev->device == PCI_PRODUCT_ID_HAPS_HSOTG) { 69 struct property_entry properties[] = { 70 PROPERTY_ENTRY_BOOL("g-use-dma"), 71 { }, 72 }; 73 74 return platform_device_add_properties(dwc2, properties); 75 } 76 77 return 0; 78 } 79 80 static void dwc2_pci_remove(struct pci_dev *pci) 81 { 82 struct dwc2_pci_glue *glue = pci_get_drvdata(pci); 83 84 platform_device_unregister(glue->dwc2); 85 usb_phy_generic_unregister(glue->phy); 86 kfree(glue); 87 pci_set_drvdata(pci, NULL); 88 } 89 90 static int dwc2_pci_probe(struct pci_dev *pci, 91 const struct pci_device_id *id) 92 { 93 struct resource res[2]; 94 struct platform_device *dwc2; 95 struct platform_device *phy; 96 int ret; 97 struct device *dev = &pci->dev; 98 struct dwc2_pci_glue *glue; 99 100 ret = pcim_enable_device(pci); 101 if (ret) { 102 dev_err(dev, "failed to enable pci device\n"); 103 return -ENODEV; 104 } 105 106 pci_set_master(pci); 107 108 dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO); 109 if (!dwc2) { 110 dev_err(dev, "couldn't allocate dwc2 device\n"); 111 return -ENOMEM; 112 } 113 114 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 115 116 res[0].start = pci_resource_start(pci, 0); 117 res[0].end = pci_resource_end(pci, 0); 118 res[0].name = "dwc2"; 119 res[0].flags = IORESOURCE_MEM; 120 121 res[1].start = pci->irq; 122 res[1].name = "dwc2"; 123 res[1].flags = IORESOURCE_IRQ; 124 125 ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res)); 126 if (ret) { 127 dev_err(dev, "couldn't add resources to dwc2 device\n"); 128 return ret; 129 } 130 131 dwc2->dev.parent = dev; 132 133 phy = usb_phy_generic_register(); 134 if (IS_ERR(phy)) { 135 dev_err(dev, "error registering generic PHY (%ld)\n", 136 PTR_ERR(phy)); 137 return PTR_ERR(phy); 138 } 139 140 ret = dwc2_pci_quirks(pci, dwc2); 141 if (ret) 142 goto err; 143 144 ret = platform_device_add(dwc2); 145 if (ret) { 146 dev_err(dev, "failed to register dwc2 device\n"); 147 goto err; 148 } 149 150 glue = kzalloc(sizeof(*glue), GFP_KERNEL); 151 if (!glue) 152 return -ENOMEM; 153 154 glue->phy = phy; 155 glue->dwc2 = dwc2; 156 pci_set_drvdata(pci, glue); 157 158 return 0; 159 err: 160 usb_phy_generic_unregister(phy); 161 platform_device_put(dwc2); 162 return ret; 163 } 164 165 static const struct pci_device_id dwc2_pci_ids[] = { 166 { 167 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG), 168 }, 169 { 170 PCI_DEVICE(PCI_VENDOR_ID_STMICRO, 171 PCI_DEVICE_ID_STMICRO_USB_OTG), 172 }, 173 { /* end: all zeroes */ } 174 }; 175 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids); 176 177 static struct pci_driver dwc2_pci_driver = { 178 .name = dwc2_driver_name, 179 .id_table = dwc2_pci_ids, 180 .probe = dwc2_pci_probe, 181 .remove = dwc2_pci_remove, 182 }; 183 184 module_pci_driver(dwc2_pci_driver); 185 186 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue"); 187 MODULE_AUTHOR("Synopsys, Inc."); 188 MODULE_LICENSE("Dual BSD/GPL"); 189