1 // SPDX-License-Identifier: GPL-2.0 2 /** 3 * dwc3-haps.c - Synopsys HAPS PCI Specific glue layer 4 * 5 * Copyright (C) 2018 Synopsys, Inc. 6 * 7 * Authors: Thinh Nguyen <thinhn@synopsys.com>, 8 * John Youn <johnyoun@synopsys.com> 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/slab.h> 14 #include <linux/pci.h> 15 #include <linux/platform_device.h> 16 #include <linux/property.h> 17 18 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd 19 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce 20 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf 21 22 /** 23 * struct dwc3_haps - Driver private structure 24 * @dwc3: child dwc3 platform_device 25 * @pci: our link to PCI bus 26 */ 27 struct dwc3_haps { 28 struct platform_device *dwc3; 29 struct pci_dev *pci; 30 }; 31 32 static const struct property_entry initial_properties[] = { 33 PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"), 34 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 35 PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"), 36 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), 37 { }, 38 }; 39 40 static int dwc3_haps_probe(struct pci_dev *pci, 41 const struct pci_device_id *id) 42 { 43 struct dwc3_haps *dwc; 44 struct device *dev = &pci->dev; 45 struct resource res[2]; 46 int ret; 47 48 ret = pcim_enable_device(pci); 49 if (ret) { 50 dev_err(dev, "failed to enable pci device\n"); 51 return -ENODEV; 52 } 53 54 pci_set_master(pci); 55 56 dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL); 57 if (!dwc) 58 return -ENOMEM; 59 60 dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 61 if (!dwc->dwc3) 62 return -ENOMEM; 63 64 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 65 66 res[0].start = pci_resource_start(pci, 0); 67 res[0].end = pci_resource_end(pci, 0); 68 res[0].name = "dwc_usb3"; 69 res[0].flags = IORESOURCE_MEM; 70 71 res[1].start = pci->irq; 72 res[1].name = "dwc_usb3"; 73 res[1].flags = IORESOURCE_IRQ; 74 75 ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res)); 76 if (ret) { 77 dev_err(dev, "couldn't add resources to dwc3 device\n"); 78 goto err; 79 } 80 81 dwc->pci = pci; 82 dwc->dwc3->dev.parent = dev; 83 84 ret = platform_device_add_properties(dwc->dwc3, initial_properties); 85 if (ret) 86 goto err; 87 88 ret = platform_device_add(dwc->dwc3); 89 if (ret) { 90 dev_err(dev, "failed to register dwc3 device\n"); 91 goto err; 92 } 93 94 pci_set_drvdata(pci, dwc); 95 96 return 0; 97 err: 98 platform_device_put(dwc->dwc3); 99 return ret; 100 } 101 102 static void dwc3_haps_remove(struct pci_dev *pci) 103 { 104 struct dwc3_haps *dwc = pci_get_drvdata(pci); 105 106 platform_device_unregister(dwc->dwc3); 107 } 108 109 static const struct pci_device_id dwc3_haps_id_table[] = { 110 { 111 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 112 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 113 }, 114 { 115 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 116 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI), 117 }, 118 { 119 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 120 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31), 121 }, 122 { } /* Terminating Entry */ 123 }; 124 MODULE_DEVICE_TABLE(pci, dwc3_haps_id_table); 125 126 static struct pci_driver dwc3_haps_driver = { 127 .name = "dwc3-haps", 128 .id_table = dwc3_haps_id_table, 129 .probe = dwc3_haps_probe, 130 .remove = dwc3_haps_remove, 131 }; 132 133 MODULE_AUTHOR("Thinh Nguyen <thinhn@synopsys.com>"); 134 MODULE_LICENSE("GPL v2"); 135 MODULE_DESCRIPTION("Synopsys HAPS PCI Glue Layer"); 136 137 module_pci_driver(dwc3_haps_driver); 138