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 8 /* 9 * Provides the initialization and cleanup entry points for the DWC_otg PCI 10 * driver 11 */ 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/moduleparam.h> 15 #include <linux/spinlock.h> 16 #include <linux/interrupt.h> 17 #include <linux/io.h> 18 #include <linux/slab.h> 19 #include <linux/pci.h> 20 #include <linux/usb.h> 21 22 #include <linux/usb/hcd.h> 23 #include <linux/usb/ch11.h> 24 #include <linux/platform_device.h> 25 #include <linux/usb/usb_phy_generic.h> 26 27 #define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0 28 29 static const char dwc2_driver_name[] = "dwc2-pci"; 30 31 struct dwc2_pci_glue { 32 struct platform_device *dwc2; 33 struct platform_device *phy; 34 }; 35 36 /** 37 * dwc2_pci_remove() - Provides the cleanup entry points for the DWC_otg PCI 38 * driver 39 * 40 * @pci: The programming view of DWC_otg PCI 41 */ 42 static void dwc2_pci_remove(struct pci_dev *pci) 43 { 44 struct dwc2_pci_glue *glue = pci_get_drvdata(pci); 45 46 platform_device_unregister(glue->dwc2); 47 usb_phy_generic_unregister(glue->phy); 48 pci_set_drvdata(pci, NULL); 49 } 50 51 static int dwc2_pci_probe(struct pci_dev *pci, 52 const struct pci_device_id *id) 53 { 54 struct resource res[2]; 55 struct platform_device *dwc2; 56 struct platform_device *phy; 57 int ret; 58 struct device *dev = &pci->dev; 59 struct dwc2_pci_glue *glue; 60 61 ret = pcim_enable_device(pci); 62 if (ret) { 63 dev_err(dev, "failed to enable pci device\n"); 64 return -ENODEV; 65 } 66 67 pci_set_master(pci); 68 69 phy = usb_phy_generic_register(); 70 if (IS_ERR(phy)) { 71 dev_err(dev, "error registering generic PHY (%ld)\n", 72 PTR_ERR(phy)); 73 return PTR_ERR(phy); 74 } 75 76 dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO); 77 if (!dwc2) { 78 dev_err(dev, "couldn't allocate dwc2 device\n"); 79 ret = -ENOMEM; 80 goto err; 81 } 82 83 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 84 85 res[0].start = pci_resource_start(pci, 0); 86 res[0].end = pci_resource_end(pci, 0); 87 res[0].name = "dwc2"; 88 res[0].flags = IORESOURCE_MEM; 89 90 res[1].start = pci->irq; 91 res[1].name = "dwc2"; 92 res[1].flags = IORESOURCE_IRQ; 93 94 ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res)); 95 if (ret) { 96 dev_err(dev, "couldn't add resources to dwc2 device\n"); 97 goto err; 98 } 99 100 dwc2->dev.parent = dev; 101 102 glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL); 103 if (!glue) { 104 ret = -ENOMEM; 105 goto err; 106 } 107 108 ret = platform_device_add(dwc2); 109 if (ret) { 110 dev_err(dev, "failed to register dwc2 device\n"); 111 goto err; 112 } 113 114 glue->phy = phy; 115 glue->dwc2 = dwc2; 116 pci_set_drvdata(pci, glue); 117 118 return 0; 119 err: 120 usb_phy_generic_unregister(phy); 121 platform_device_put(dwc2); 122 return ret; 123 } 124 125 static const struct pci_device_id dwc2_pci_ids[] = { 126 { 127 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG), 128 }, 129 { 130 PCI_DEVICE(PCI_VENDOR_ID_STMICRO, 131 PCI_DEVICE_ID_STMICRO_USB_OTG), 132 }, 133 { /* end: all zeroes */ } 134 }; 135 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids); 136 137 static struct pci_driver dwc2_pci_driver = { 138 .name = dwc2_driver_name, 139 .id_table = dwc2_pci_ids, 140 .probe = dwc2_pci_probe, 141 .remove = dwc2_pci_remove, 142 }; 143 144 module_pci_driver(dwc2_pci_driver); 145 146 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue"); 147 MODULE_AUTHOR("Synopsys, Inc."); 148 MODULE_LICENSE("Dual BSD/GPL"); 149