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