1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
4  *
5  * Derived from linux/arch/mips/bcm63xx/usb-common.c:
6  *	Copyright 2008 Maxime Bizon <mbizon@freebox.fr>
7  *	Copyright 2013 Florian Fainelli <florian@openwrt.org>
8  */
9 
10 #include <common.h>
11 #include <clk.h>
12 #include <dm.h>
13 #include <generic-phy.h>
14 #include <reset.h>
15 #include <asm/io.h>
16 #include <dm/device.h>
17 
18 #define USBH_SETUP_PORT1_EN	BIT(0)
19 
20 struct bcm6348_usbh_priv {
21 	void __iomem *regs;
22 };
23 
24 static int bcm6348_usbh_init(struct phy *phy)
25 {
26 	struct bcm6348_usbh_priv *priv = dev_get_priv(phy->dev);
27 
28 	writel_be(USBH_SETUP_PORT1_EN, priv->regs);
29 
30 	return 0;
31 }
32 
33 static struct phy_ops bcm6348_usbh_ops = {
34 	.init = bcm6348_usbh_init,
35 };
36 
37 static const struct udevice_id bcm6348_usbh_ids[] = {
38 	{ .compatible = "brcm,bcm6348-usbh" },
39 	{ /* sentinel */ }
40 };
41 
42 static int bcm6348_usbh_probe(struct udevice *dev)
43 {
44 	struct bcm6348_usbh_priv *priv = dev_get_priv(dev);
45 	struct reset_ctl rst_ctl;
46 	struct clk clk;
47 	int ret;
48 
49 	priv->regs = dev_remap_addr(dev);
50 	if (!priv->regs)
51 		return -EINVAL;
52 
53 	/* enable usbh clock */
54 	ret = clk_get_by_name(dev, "usbh", &clk);
55 	if (ret < 0)
56 		return ret;
57 
58 	ret = clk_enable(&clk);
59 	if (ret < 0)
60 		return ret;
61 
62 	ret = clk_free(&clk);
63 	if (ret < 0)
64 		return ret;
65 
66 	/* perform reset */
67 	ret = reset_get_by_index(dev, 0, &rst_ctl);
68 	if (ret < 0)
69 		return ret;
70 
71 	ret = reset_deassert(&rst_ctl);
72 	if (ret < 0)
73 		return ret;
74 
75 	ret = reset_free(&rst_ctl);
76 	if (ret < 0)
77 		return ret;
78 
79 	return 0;
80 }
81 
82 U_BOOT_DRIVER(bcm6348_usbh) = {
83 	.name = "bcm6348-usbh",
84 	.id = UCLASS_PHY,
85 	.of_match = bcm6348_usbh_ids,
86 	.ops = &bcm6348_usbh_ops,
87 	.priv_auto_alloc_size = sizeof(struct bcm6348_usbh_priv),
88 	.probe = bcm6348_usbh_probe,
89 };
90