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 <log.h>
15 #include <malloc.h>
16 #include <reset.h>
17 #include <asm/io.h>
18 #include <dm/device.h>
19 #include <linux/bitops.h>
20
21 #define USBH_SETUP_PORT1_EN BIT(0)
22
23 struct bcm6348_usbh_priv {
24 void __iomem *regs;
25 };
26
bcm6348_usbh_init(struct phy * phy)27 static int bcm6348_usbh_init(struct phy *phy)
28 {
29 struct bcm6348_usbh_priv *priv = dev_get_priv(phy->dev);
30
31 writel_be(USBH_SETUP_PORT1_EN, priv->regs);
32
33 return 0;
34 }
35
36 static struct phy_ops bcm6348_usbh_ops = {
37 .init = bcm6348_usbh_init,
38 };
39
40 static const struct udevice_id bcm6348_usbh_ids[] = {
41 { .compatible = "brcm,bcm6348-usbh" },
42 { /* sentinel */ }
43 };
44
bcm6348_usbh_probe(struct udevice * dev)45 static int bcm6348_usbh_probe(struct udevice *dev)
46 {
47 struct bcm6348_usbh_priv *priv = dev_get_priv(dev);
48 struct reset_ctl rst_ctl;
49 struct clk clk;
50 int ret;
51
52 priv->regs = dev_remap_addr(dev);
53 if (!priv->regs)
54 return -EINVAL;
55
56 /* enable usbh clock */
57 ret = clk_get_by_name(dev, "usbh", &clk);
58 if (ret < 0)
59 return ret;
60
61 ret = clk_enable(&clk);
62 if (ret < 0)
63 return ret;
64
65 ret = clk_free(&clk);
66 if (ret < 0)
67 return ret;
68
69 /* perform reset */
70 ret = reset_get_by_index(dev, 0, &rst_ctl);
71 if (ret < 0)
72 return ret;
73
74 ret = reset_deassert(&rst_ctl);
75 if (ret < 0)
76 return ret;
77
78 ret = reset_free(&rst_ctl);
79 if (ret < 0)
80 return ret;
81
82 return 0;
83 }
84
85 U_BOOT_DRIVER(bcm6348_usbh) = {
86 .name = "bcm6348-usbh",
87 .id = UCLASS_PHY,
88 .of_match = bcm6348_usbh_ids,
89 .ops = &bcm6348_usbh_ops,
90 .priv_auto = sizeof(struct bcm6348_usbh_priv),
91 .probe = bcm6348_usbh_probe,
92 };
93