1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
4 * Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <generic-phy.h>
10
11 #define DRIVER_DATA 0x12345678
12
13 struct sandbox_phy_priv {
14 bool initialized;
15 bool on;
16 bool broken;
17 };
18
sandbox_phy_power_on(struct phy * phy)19 static int sandbox_phy_power_on(struct phy *phy)
20 {
21 struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
22
23 if (!priv->initialized)
24 return -EIO;
25
26 if (priv->broken)
27 return -EIO;
28
29 priv->on = true;
30
31 return 0;
32 }
33
sandbox_phy_power_off(struct phy * phy)34 static int sandbox_phy_power_off(struct phy *phy)
35 {
36 struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
37
38 if (!priv->initialized)
39 return -EIO;
40
41 if (priv->broken)
42 return -EIO;
43
44 /*
45 * for validation purpose, let's says that power off
46 * works only for PHY 0
47 */
48 if (phy->id)
49 return -EIO;
50
51 priv->on = false;
52
53 return 0;
54 }
55
sandbox_phy_init(struct phy * phy)56 static int sandbox_phy_init(struct phy *phy)
57 {
58 struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
59
60 priv->initialized = true;
61 priv->on = true;
62
63 return 0;
64 }
65
sandbox_phy_exit(struct phy * phy)66 static int sandbox_phy_exit(struct phy *phy)
67 {
68 struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
69
70 priv->initialized = false;
71 priv->on = false;
72
73 return 0;
74 }
75
sandbox_phy_bind(struct udevice * dev)76 static int sandbox_phy_bind(struct udevice *dev)
77 {
78 if (dev_get_driver_data(dev) != DRIVER_DATA)
79 return -ENODATA;
80
81 return 0;
82 }
83
sandbox_phy_probe(struct udevice * dev)84 static int sandbox_phy_probe(struct udevice *dev)
85 {
86 struct sandbox_phy_priv *priv = dev_get_priv(dev);
87
88 priv->initialized = false;
89 priv->on = false;
90 priv->broken = dev_read_bool(dev, "broken");
91
92 return 0;
93 }
94
95 static struct phy_ops sandbox_phy_ops = {
96 .power_on = sandbox_phy_power_on,
97 .power_off = sandbox_phy_power_off,
98 .init = sandbox_phy_init,
99 .exit = sandbox_phy_exit,
100 };
101
102 static const struct udevice_id sandbox_phy_ids[] = {
103 { .compatible = "sandbox,phy_no_driver_data",
104 },
105
106 { .compatible = "sandbox,phy",
107 .data = DRIVER_DATA
108 },
109 { }
110 };
111
112 U_BOOT_DRIVER(phy_sandbox) = {
113 .name = "phy_sandbox",
114 .id = UCLASS_PHY,
115 .bind = sandbox_phy_bind,
116 .of_match = sandbox_phy_ids,
117 .ops = &sandbox_phy_ops,
118 .probe = sandbox_phy_probe,
119 .priv_auto = sizeof(struct sandbox_phy_priv),
120 };
121