Merge tag 'dm-pull-14dec20' of git://git.denx.de/u-boot-dm into next
[platform/kernel/u-boot.git] / drivers / misc / misc_sandbox.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2018
4  * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
5  */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <misc.h>
10
11 struct misc_sandbox_priv {
12         u8 mem[128];
13         ulong last_ioctl;
14         bool enabled;
15 };
16
17 int misc_sandbox_read(struct udevice *dev, int offset, void *buf, int size)
18 {
19         struct misc_sandbox_priv *priv = dev_get_priv(dev);
20
21         memcpy(buf, priv->mem + offset, size);
22
23         return size;
24 }
25
26 int misc_sandbox_write(struct udevice *dev, int offset, const void *buf,
27                        int size)
28 {
29         struct misc_sandbox_priv *priv = dev_get_priv(dev);
30
31         memcpy(priv->mem + offset, buf, size);
32
33         return size;
34 }
35
36 int misc_sandbox_ioctl(struct udevice *dev, unsigned long request, void *buf)
37 {
38         struct misc_sandbox_priv *priv = dev_get_priv(dev);
39
40         priv->last_ioctl = request;
41
42         return 0;
43 }
44
45 int misc_sandbox_call(struct udevice *dev, int msgid, void *tx_msg,
46                       int tx_size, void *rx_msg, int rx_size)
47 {
48         struct misc_sandbox_priv *priv = dev_get_priv(dev);
49
50         if (msgid == 0) {
51                 int num = *(int *)tx_msg;
52
53                 switch (num) {
54                 case 0:
55                         strncpy(rx_msg, "Zero", rx_size);
56                         break;
57                 case 1:
58                         strncpy(rx_msg, "One", rx_size);
59                         break;
60                 case 2:
61                         strncpy(rx_msg, "Two", rx_size);
62                         break;
63                 default:
64                         return -EINVAL;
65                 }
66         }
67
68         if (msgid == 1) {
69                 int num = *(int *)tx_msg;
70
71                 switch (num) {
72                 case 0:
73                         strncpy(rx_msg, "Forty", rx_size);
74                         break;
75                 case 1:
76                         strncpy(rx_msg, "Forty-one", rx_size);
77                         break;
78                 case 2:
79                         strncpy(rx_msg, "Forty-two", rx_size);
80                         break;
81                 default:
82                         return -EINVAL;
83                 }
84         }
85
86         if (msgid == 2)
87                 memcpy(rx_msg, &priv->last_ioctl, sizeof(priv->last_ioctl));
88
89         if (msgid == 3)
90                 memcpy(rx_msg, &priv->enabled, sizeof(priv->enabled));
91
92         return 0;
93 }
94
95 int misc_sandbox_set_enabled(struct udevice *dev, bool val)
96 {
97         struct misc_sandbox_priv *priv = dev_get_priv(dev);
98
99         priv->enabled = !priv->enabled;
100
101         return 0;
102 }
103
104 static const struct misc_ops misc_sandbox_ops = {
105         .read = misc_sandbox_read,
106         .write = misc_sandbox_write,
107         .ioctl = misc_sandbox_ioctl,
108         .call = misc_sandbox_call,
109         .set_enabled = misc_sandbox_set_enabled,
110 };
111
112 int misc_sandbox_probe(struct udevice *dev)
113 {
114         struct misc_sandbox_priv *priv = dev_get_priv(dev);
115
116         priv->enabled = true;
117
118         return 0;
119 }
120
121 static const struct udevice_id misc_sandbox_ids[] = {
122         { .compatible = "sandbox,misc_sandbox" },
123         { }
124 };
125
126 U_BOOT_DRIVER(misc_sandbox) = {
127         .name           = "misc_sandbox",
128         .id             = UCLASS_MISC,
129         .ops            = &misc_sandbox_ops,
130         .of_match       = misc_sandbox_ids,
131         .probe          = misc_sandbox_probe,
132         .priv_auto      = sizeof(struct misc_sandbox_priv),
133 };