| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /** |
| 3 | * host.c - DesignWare USB3 DRD Controller Host Glue |
| 4 | * |
| 5 | * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com |
| 6 | * |
| 7 | * Authors: Felipe Balbi <balbi@ti.com>, |
| 8 | */ |
| 9 | |
| 10 | #include <linux/platform_device.h> |
| 11 | |
| 12 | #include "core.h" |
| 13 | |
| 14 | static int dwc3_host_get_irq(struct dwc3 *dwc) |
| 15 | { |
| 16 | struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); |
| 17 | int irq; |
| 18 | |
| 19 | irq = platform_get_irq_byname_optional(dwc3_pdev, "host"); |
| 20 | if (irq > 0) |
| 21 | goto out; |
| 22 | |
| 23 | if (irq == -EPROBE_DEFER) |
| 24 | goto out; |
| 25 | |
| 26 | irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3"); |
| 27 | if (irq > 0) |
| 28 | goto out; |
| 29 | |
| 30 | if (irq == -EPROBE_DEFER) |
| 31 | goto out; |
| 32 | |
| 33 | irq = platform_get_irq(dwc3_pdev, 0); |
| 34 | if (irq > 0) |
| 35 | goto out; |
| 36 | |
| 37 | if (!irq) |
| 38 | irq = -EINVAL; |
| 39 | |
| 40 | out: |
| 41 | return irq; |
| 42 | } |
| 43 | |
| 44 | int dwc3_host_init(struct dwc3 *dwc) |
| 45 | { |
| 46 | struct property_entry props[4]; |
| 47 | struct platform_device *xhci; |
| 48 | int ret, irq; |
| 49 | struct resource *res; |
| 50 | struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); |
| 51 | int prop_idx = 0; |
| 52 | |
| 53 | irq = dwc3_host_get_irq(dwc); |
| 54 | if (irq < 0) |
| 55 | return irq; |
| 56 | dev_info(dwc->dev, "host irq: %d\n", irq); |
| 57 | |
| 58 | res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); |
| 59 | if (!res) |
| 60 | res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, |
| 61 | "dwc_usb3"); |
| 62 | |
| 63 | if (!res) |
| 64 | res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); |
| 65 | if (!res) |
| 66 | return -ENOMEM; |
| 67 | |
| 68 | dwc->xhci_resources[1].start = irq; |
| 69 | dwc->xhci_resources[1].end = irq; |
| 70 | dwc->xhci_resources[1].flags = res->flags; |
| 71 | dwc->xhci_resources[1].name = res->name; |
| 72 | |
| 73 | xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); |
| 74 | if (!xhci) { |
| 75 | dev_err(dwc->dev, "couldn't allocate xHCI device\n"); |
| 76 | return -ENOMEM; |
| 77 | } |
| 78 | |
| 79 | xhci->dev.parent = dwc->dev; |
| 80 | |
| 81 | dwc->xhci = xhci; |
| 82 | |
| 83 | ret = platform_device_add_resources(xhci, dwc->xhci_resources, |
| 84 | DWC3_XHCI_RESOURCES_NUM); |
| 85 | if (ret) { |
| 86 | dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); |
| 87 | goto err; |
| 88 | } |
| 89 | |
| 90 | memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); |
| 91 | |
| 92 | if (dwc->usb3_lpm_capable) |
| 93 | props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable"); |
| 94 | |
| 95 | if (dwc->usb2_lpm_disable) |
| 96 | props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable"); |
| 97 | |
| 98 | /** |
| 99 | * WORKAROUND: dwc3 revisions <=3.00a have a limitation |
| 100 | * where Port Disable command doesn't work. |
| 101 | * |
| 102 | * The suggested workaround is that we avoid Port Disable |
| 103 | * completely. |
| 104 | * |
| 105 | * This following flag tells XHCI to do just that. |
| 106 | */ |
| 107 | if (dwc->revision <= DWC3_REVISION_300A) |
| 108 | props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped"); |
| 109 | |
| 110 | if (prop_idx) { |
| 111 | ret = platform_device_add_properties(xhci, props); |
| 112 | if (ret) { |
| 113 | dev_err(dwc->dev, "failed to add properties to xHCI\n"); |
| 114 | goto err; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | ret = platform_device_add(xhci); |
| 119 | if (ret) { |
| 120 | dev_err(dwc->dev, "failed to register xHCI device\n"); |
| 121 | goto err; |
| 122 | } |
| 123 | |
| 124 | return 0; |
| 125 | err: |
| 126 | platform_device_put(xhci); |
| 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | void dwc3_host_exit(struct dwc3 *dwc) |
| 131 | { |
| 132 | platform_device_unregister(dwc->xhci); |
| 133 | dwc->xhci = NULL; |
| 134 | } |