1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) 2 /* 3 * pci.c - DesignWare HS OTG Controller PCI driver 4 * 5 * Copyright (C) 2004-2013 Synopsys, Inc. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The names of the above-listed copyright holders may not be used 17 * to endorse or promote products derived from this software without 18 * specific prior written permission. 19 * 20 * ALTERNATIVELY, this software may be distributed under the terms of the 21 * GNU General Public License ("GPL") as published by the Free Software 22 * Foundation; either version 2 of the License, or (at your option) any 23 * later version. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 26 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 27 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Provides the initialization and cleanup entry points for the DWC_otg PCI 40 * driver 41 */ 42 #include <linux/kernel.h> 43 #include <linux/module.h> 44 #include <linux/moduleparam.h> 45 #include <linux/spinlock.h> 46 #include <linux/interrupt.h> 47 #include <linux/io.h> 48 #include <linux/slab.h> 49 #include <linux/pci.h> 50 #include <linux/usb.h> 51 52 #include <linux/usb/hcd.h> 53 #include <linux/usb/ch11.h> 54 #include <linux/platform_device.h> 55 #include <linux/usb/usb_phy_generic.h> 56 57 #define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0 58 59 static const char dwc2_driver_name[] = "dwc2-pci"; 60 61 struct dwc2_pci_glue { 62 struct platform_device *dwc2; 63 struct platform_device *phy; 64 }; 65 66 /** 67 * dwc2_pci_remove() - Provides the cleanup entry points for the DWC_otg PCI 68 * driver 69 * 70 * @pci: The programming view of DWC_otg PCI 71 */ 72 static void dwc2_pci_remove(struct pci_dev *pci) 73 { 74 struct dwc2_pci_glue *glue = pci_get_drvdata(pci); 75 76 platform_device_unregister(glue->dwc2); 77 usb_phy_generic_unregister(glue->phy); 78 pci_set_drvdata(pci, NULL); 79 } 80 81 static int dwc2_pci_probe(struct pci_dev *pci, 82 const struct pci_device_id *id) 83 { 84 struct resource res[2]; 85 struct platform_device *dwc2; 86 struct platform_device *phy; 87 int ret; 88 struct device *dev = &pci->dev; 89 struct dwc2_pci_glue *glue; 90 91 ret = pcim_enable_device(pci); 92 if (ret) { 93 dev_err(dev, "failed to enable pci device\n"); 94 return -ENODEV; 95 } 96 97 pci_set_master(pci); 98 99 phy = usb_phy_generic_register(); 100 if (IS_ERR(phy)) { 101 dev_err(dev, "error registering generic PHY (%ld)\n", 102 PTR_ERR(phy)); 103 return PTR_ERR(phy); 104 } 105 106 dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO); 107 if (!dwc2) { 108 dev_err(dev, "couldn't allocate dwc2 device\n"); 109 ret = -ENOMEM; 110 goto err; 111 } 112 113 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 114 115 res[0].start = pci_resource_start(pci, 0); 116 res[0].end = pci_resource_end(pci, 0); 117 res[0].name = "dwc2"; 118 res[0].flags = IORESOURCE_MEM; 119 120 res[1].start = pci->irq; 121 res[1].name = "dwc2"; 122 res[1].flags = IORESOURCE_IRQ; 123 124 ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res)); 125 if (ret) { 126 dev_err(dev, "couldn't add resources to dwc2 device\n"); 127 goto err; 128 } 129 130 dwc2->dev.parent = dev; 131 132 glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL); 133 if (!glue) { 134 ret = -ENOMEM; 135 goto err; 136 } 137 138 ret = platform_device_add(dwc2); 139 if (ret) { 140 dev_err(dev, "failed to register dwc2 device\n"); 141 goto err; 142 } 143 144 glue->phy = phy; 145 glue->dwc2 = dwc2; 146 pci_set_drvdata(pci, glue); 147 148 return 0; 149 err: 150 usb_phy_generic_unregister(phy); 151 platform_device_put(dwc2); 152 return ret; 153 } 154 155 static const struct pci_device_id dwc2_pci_ids[] = { 156 { 157 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG), 158 }, 159 { 160 PCI_DEVICE(PCI_VENDOR_ID_STMICRO, 161 PCI_DEVICE_ID_STMICRO_USB_OTG), 162 }, 163 { /* end: all zeroes */ } 164 }; 165 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids); 166 167 static struct pci_driver dwc2_pci_driver = { 168 .name = dwc2_driver_name, 169 .id_table = dwc2_pci_ids, 170 .probe = dwc2_pci_probe, 171 .remove = dwc2_pci_remove, 172 }; 173 174 module_pci_driver(dwc2_pci_driver); 175 176 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue"); 177 MODULE_AUTHOR("Synopsys, Inc."); 178 MODULE_LICENSE("Dual BSD/GPL"); 179