projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 3fe314ca TN |
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 | ||
| 3fe314ca TN |
18 | /** |
| 19 | * struct dwc3_haps - Driver private structure | |
| 20 | * @dwc3: child dwc3 platform_device | |
| 21 | * @pci: our link to PCI bus | |
| 22 | */ | |
| 23 | struct dwc3_haps { | |
| 24 | struct platform_device *dwc3; | |
| 25 | struct pci_dev *pci; | |
| 26 | }; | |
| 27 | ||
| 28 | static const struct property_entry initial_properties[] = { | |
| 29 | PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"), | |
| 30 | PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), | |
| 31 | PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"), | |
| 32 | PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), | |
| 33 | { }, | |
| 34 | }; | |
| 35 | ||
| 36 | static int dwc3_haps_probe(struct pci_dev *pci, | |
| 37 | const struct pci_device_id *id) | |
| 38 | { | |
| 39 | struct dwc3_haps *dwc; | |
| 40 | struct device *dev = &pci->dev; | |
| 41 | struct resource res[2]; | |
| 42 | int ret; | |
| 43 | ||
| 44 | ret = pcim_enable_device(pci); | |
| 45 | if (ret) { | |
| 46 | dev_err(dev, "failed to enable pci device\n"); | |
| 47 | return -ENODEV; | |
| 48 | } | |
| 49 | ||
| 50 | pci_set_master(pci); | |
| 51 | ||
| 52 | dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL); | |
| 53 | if (!dwc) | |
| 54 | return -ENOMEM; | |
| 55 | ||
| 56 | dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); | |
| 57 | if (!dwc->dwc3) | |
| 58 | return -ENOMEM; | |
| 59 | ||
| 60 | memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); | |
| 61 | ||
| 62 | res[0].start = pci_resource_start(pci, 0); | |
| 63 | res[0].end = pci_resource_end(pci, 0); | |
| 64 | res[0].name = "dwc_usb3"; | |
| 65 | res[0].flags = IORESOURCE_MEM; | |
| 66 | ||
| 67 | res[1].start = pci->irq; | |
| 68 | res[1].name = "dwc_usb3"; | |
| 69 | res[1].flags = IORESOURCE_IRQ; | |
| 70 | ||
| 71 | ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res)); | |
| 72 | if (ret) { | |
| 73 | dev_err(dev, "couldn't add resources to dwc3 device\n"); | |
| 74 | goto err; | |
| 75 | } | |
| 76 | ||
| 77 | dwc->pci = pci; | |
| 78 | dwc->dwc3->dev.parent = dev; | |
| 79 | ||
| 80 | ret = platform_device_add_properties(dwc->dwc3, initial_properties); | |
| 81 | if (ret) | |
| 82 | goto err; | |
| 83 | ||
| 84 | ret = platform_device_add(dwc->dwc3); | |
| 85 | if (ret) { | |
| 86 | dev_err(dev, "failed to register dwc3 device\n"); | |
| 87 | goto err; | |
| 88 | } | |
| 89 | ||
| 90 | pci_set_drvdata(pci, dwc); | |
| 91 | ||
| 92 | return 0; | |
| 93 | err: | |
| 94 | platform_device_put(dwc->dwc3); | |
| 95 | return ret; | |
| 96 | } | |
| 97 | ||
| 98 | static void dwc3_haps_remove(struct pci_dev *pci) | |
| 99 | { | |
| 100 | struct dwc3_haps *dwc = pci_get_drvdata(pci); | |
| 101 | ||
| 102 | platform_device_unregister(dwc->dwc3); | |
| 103 | } | |
| 104 | ||
| 105 | static const struct pci_device_id dwc3_haps_id_table[] = { | |
| 106 | { | |
| 107 | PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, | |
| 108 | PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), | |
| 9c7ebc99 TN |
109 | /* |
| 110 | * i.MX6QP and i.MX7D platform use a PCIe controller with the | |
| 111 | * same VID and PID as this USB controller. The system may | |
| 112 | * incorrectly match this driver to that PCIe controller. To | |
| 113 | * workaround this, specifically use class type USB to prevent | |
| 114 | * incorrect driver matching. | |
| 115 | */ | |
| 116 | .class = (PCI_CLASS_SERIAL_USB << 8), | |
| 117 | .class_mask = 0xffff00, | |
| 3fe314ca TN |
118 | }, |
| 119 | { | |
| 120 | PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, | |
| 121 | PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI), | |
| 122 | }, | |
| 123 | { | |
| 124 | PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, | |
| 125 | PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31), | |
| 126 | }, | |
| 127 | { } /* Terminating Entry */ | |
| 128 | }; | |
| 129 | MODULE_DEVICE_TABLE(pci, dwc3_haps_id_table); | |
| 130 | ||
| 131 | static struct pci_driver dwc3_haps_driver = { | |
| 132 | .name = "dwc3-haps", | |
| 133 | .id_table = dwc3_haps_id_table, | |
| 134 | .probe = dwc3_haps_probe, | |
| 135 | .remove = dwc3_haps_remove, | |
| 136 | }; | |
| 137 | ||
| 138 | MODULE_AUTHOR("Thinh Nguyen <thinhn@synopsys.com>"); | |
| 139 | MODULE_LICENSE("GPL v2"); | |
| 140 | MODULE_DESCRIPTION("Synopsys HAPS PCI Glue Layer"); | |
| 141 | ||
| 142 | module_pci_driver(dwc3_haps_driver); |