1 /*
2  * Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
3  *
4  * Derived from linux/arch/mips/bcm63xx/usb-common.c:
5  *	Copyright 2008 Maxime Bizon <mbizon@freebox.fr>
6  *	Copyright 2013 Florian Fainelli <florian@openwrt.org>
7  *
8  * SPDX-License-Identifier: GPL-2.0+
9  */
10 
11 #include <common.h>
12 #include <clk.h>
13 #include <dm.h>
14 #include <generic-phy.h>
15 #include <reset.h>
16 #include <asm/io.h>
17 #include <dm/device.h>
18 
19 #define USBH_SETUP_PORT1_EN	BIT(0)
20 
21 struct bcm6348_usbh_priv {
22 	void __iomem *regs;
23 };
24 
25 static int bcm6348_usbh_init(struct phy *phy)
26 {
27 	struct bcm6348_usbh_priv *priv = dev_get_priv(phy->dev);
28 
29 	writel_be(USBH_SETUP_PORT1_EN, priv->regs);
30 
31 	return 0;
32 }
33 
34 static struct phy_ops bcm6348_usbh_ops = {
35 	.init = bcm6348_usbh_init,
36 };
37 
38 static const struct udevice_id bcm6348_usbh_ids[] = {
39 	{ .compatible = "brcm,bcm6348-usbh" },
40 	{ /* sentinel */ }
41 };
42 
43 static int bcm6348_usbh_probe(struct udevice *dev)
44 {
45 	struct bcm6348_usbh_priv *priv = dev_get_priv(dev);
46 	struct reset_ctl rst_ctl;
47 	struct clk clk;
48 	fdt_addr_t addr;
49 	fdt_size_t size;
50 	int ret;
51 
52 	addr = devfdt_get_addr_size_index(dev, 0, &size);
53 	if (addr == FDT_ADDR_T_NONE)
54 		return -EINVAL;
55 
56 	priv->regs = ioremap(addr, size);
57 
58 	/* enable usbh clock */
59 	ret = clk_get_by_name(dev, "usbh", &clk);
60 	if (ret < 0)
61 		return ret;
62 
63 	ret = clk_enable(&clk);
64 	if (ret < 0)
65 		return ret;
66 
67 	ret = clk_free(&clk);
68 	if (ret < 0)
69 		return ret;
70 
71 	/* perform reset */
72 	ret = reset_get_by_index(dev, 0, &rst_ctl);
73 	if (ret < 0)
74 		return ret;
75 
76 	ret = reset_deassert(&rst_ctl);
77 	if (ret < 0)
78 		return ret;
79 
80 	ret = reset_free(&rst_ctl);
81 	if (ret < 0)
82 		return ret;
83 
84 	return 0;
85 }
86 
87 U_BOOT_DRIVER(bcm6348_usbh) = {
88 	.name = "bcm6348-usbh",
89 	.id = UCLASS_PHY,
90 	.of_match = bcm6348_usbh_ids,
91 	.ops = &bcm6348_usbh_ops,
92 	.priv_auto_alloc_size = sizeof(struct bcm6348_usbh_priv),
93 	.probe = bcm6348_usbh_probe,
94 };
95