| Jim Liu | 1fd3b3d | 2022-06-21 17:09:02 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright (c) 2021 Nuvoton Technology Corp. |
| 4 | */ |
| 5 | |
| 6 | #include <common.h> |
| 7 | #include <dm.h> |
| 8 | #include <generic-phy.h> |
| 9 | #include <reset.h> |
| 10 | #include <asm/io.h> |
| 11 | #include <dm/device_compat.h> |
| 12 | #include <linux/delay.h> |
| 13 | #include "ehci.h" |
| 14 | |
| 15 | struct npcm_ehci_priv { |
| 16 | struct ehci_ctrl ctrl; |
| 17 | struct ehci_hccr *hcd; |
| 18 | struct phy phy; |
| 19 | }; |
| 20 | |
| 21 | static int npcm_ehci_setup_phy(struct udevice *dev, struct phy *phy) |
| 22 | { |
| 23 | int ret; |
| 24 | |
| 25 | if (!phy) |
| 26 | return 0; |
| 27 | |
| 28 | ret = generic_phy_get_by_index(dev, 0, phy); |
| 29 | if (ret) { |
| 30 | if (ret != -ENOENT) { |
| 31 | dev_err(dev, "failed to get usb phy\n"); |
| 32 | return ret; |
| 33 | } |
| 34 | } else { |
| 35 | ret = generic_phy_init(phy); |
| 36 | if (ret) { |
| 37 | dev_err(dev, "failed to init usb phy\n"); |
| 38 | return ret; |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static int npcm_ehci_init(struct udevice *dev) |
| 46 | { |
| 47 | struct npcm_ehci_priv *priv = dev_get_priv(dev); |
| 48 | struct reset_ctl reset; |
| 49 | int ret; |
| 50 | |
| 51 | ret = reset_get_by_index(dev, 0, &reset); |
| 52 | if (ret && ret != -ENOENT && ret != -ENOTSUPP) { |
| 53 | dev_err(dev, "failed to get reset\n"); |
| 54 | return ret; |
| 55 | } |
| 56 | |
| 57 | /* reset controller */ |
| 58 | if (reset_valid(&reset)) |
| 59 | reset_assert(&reset); |
| 60 | |
| 61 | /* setup phy */ |
| 62 | ret = npcm_ehci_setup_phy(dev, &priv->phy); |
| 63 | if (ret) |
| 64 | return ret; |
| 65 | |
| 66 | /* release controller from reset */ |
| 67 | if (reset_valid(&reset)) |
| 68 | reset_deassert(&reset); |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | static int npcm_ehci_probe(struct udevice *dev) |
| 74 | { |
| 75 | struct npcm_ehci_priv *priv = dev_get_priv(dev); |
| 76 | struct ehci_hcor *hcor; |
| 77 | enum usb_init_type type = dev_get_driver_data(dev); |
| 78 | int ret; |
| 79 | |
| 80 | ret = npcm_ehci_init(dev); |
| 81 | if (ret) |
| 82 | return ret; |
| 83 | |
| 84 | priv->hcd = (struct ehci_hccr *)dev_read_addr_ptr(dev); |
| 85 | debug("USB HCD @0x%p\n", priv->hcd); |
| 86 | hcor = (struct ehci_hcor *)((uintptr_t)priv->hcd + |
| 87 | HC_LENGTH(ehci_readl(&priv->hcd->cr_capbase))); |
| 88 | |
| 89 | return ehci_register(dev, priv->hcd, hcor, NULL, 0, type); |
| 90 | } |
| 91 | |
| 92 | static int npcm_ehci_remove(struct udevice *dev) |
| 93 | { |
| 94 | struct npcm_ehci_priv *priv = dev_get_priv(dev); |
| 95 | |
| 96 | generic_phy_exit(&priv->phy); |
| 97 | |
| 98 | return ehci_deregister(dev); |
| 99 | } |
| 100 | |
| 101 | static const struct udevice_id npcm_ehci_ids[] = { |
| 102 | { .compatible = "nuvoton,npcm845-ehci", .data = USB_INIT_HOST }, |
| 103 | { .compatible = "nuvoton,npcm845-udc", .data = USB_INIT_DEVICE }, |
| 104 | { .compatible = "nuvoton,npcm750-ehci", .data = USB_INIT_HOST }, |
| 105 | { .compatible = "nuvoton,npcm750-udc", .data = USB_INIT_DEVICE }, |
| 106 | { } |
| 107 | }; |
| 108 | |
| 109 | U_BOOT_DRIVER(ehci_npcm) = { |
| 110 | .name = "ehci_npcm", |
| 111 | .id = UCLASS_USB, |
| 112 | .of_match = npcm_ehci_ids, |
| 113 | .probe = npcm_ehci_probe, |
| 114 | .remove = npcm_ehci_remove, |
| 115 | .ops = &ehci_usb_ops, |
| 116 | .priv_auto = sizeof(struct npcm_ehci_priv), |
| 117 | .plat_auto = sizeof(struct usb_plat), |
| 118 | .flags = DM_FLAG_ALLOC_PRIV_DMA, |
| 119 | }; |