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
bcm6348_usbh_init(struct phy * phy)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
bcm6348_usbh_probe(struct udevice * dev)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