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
15struct npcm_ehci_priv {
16	struct ehci_ctrl ctrl;
17	struct ehci_hccr *hcd;
18	struct phy phy;
19};
20
21static 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
45static 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
73static 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
92static 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
101static 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
109U_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};
120