1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2015 Google, Inc
4 */
5
6 #define LOG_CATEGORY UCLASS_KEYBOARD
7
8 #include <common.h>
9 #include <dm.h>
10 #include <keyboard.h>
11 #include <log.h>
12
keyboard_start(struct stdio_dev * sdev)13 static int keyboard_start(struct stdio_dev *sdev)
14 {
15 struct udevice *dev = sdev->priv;
16 struct keyboard_ops *ops = keyboard_get_ops(dev);
17
18 if (ops->start)
19 return ops->start(dev);
20
21 return 0;
22 }
23
keyboard_stop(struct stdio_dev * sdev)24 static int keyboard_stop(struct stdio_dev *sdev)
25 {
26 struct udevice *dev = sdev->priv;
27 struct keyboard_ops *ops = keyboard_get_ops(dev);
28
29 if (ops->stop)
30 return ops->stop(dev);
31
32 return 0;
33 }
34
keyboard_tstc(struct stdio_dev * sdev)35 static int keyboard_tstc(struct stdio_dev *sdev)
36 {
37 struct udevice *dev = sdev->priv;
38 struct keyboard_priv *priv = dev_get_uclass_priv(dev);
39 struct keyboard_ops *ops = keyboard_get_ops(dev);
40
41 /* Just get input to do this for us if we can */
42 if (priv->input.dev)
43 return input_tstc(&priv->input);
44 else if (ops->tstc)
45 return ops->tstc(dev);
46
47 return -ENOSYS;
48 }
49
keyboard_getc(struct stdio_dev * sdev)50 static int keyboard_getc(struct stdio_dev *sdev)
51 {
52 struct udevice *dev = sdev->priv;
53 struct keyboard_priv *priv = dev_get_uclass_priv(dev);
54 struct keyboard_ops *ops = keyboard_get_ops(dev);
55
56 /* Just get input to do this for us if we can */
57 if (priv->input.dev)
58 return input_getc(&priv->input);
59 else if (ops->getc)
60 return ops->getc(dev);
61
62 return -ENOSYS;
63 }
64
keyboard_pre_probe(struct udevice * dev)65 static int keyboard_pre_probe(struct udevice *dev)
66 {
67 struct keyboard_priv *priv = dev_get_uclass_priv(dev);
68 struct stdio_dev *sdev = &priv->sdev;
69 int ret;
70
71 strlcpy(sdev->name, dev->name, sizeof(sdev->name));
72 sdev->flags = DEV_FLAGS_INPUT;
73 sdev->getc = keyboard_getc;
74 sdev->tstc = keyboard_tstc;
75 sdev->start = keyboard_start;
76 sdev->stop = keyboard_stop;
77 sdev->priv = dev;
78 ret = input_init(&priv->input, 0);
79 if (ret) {
80 debug("%s: Cannot set up input, ret=%d - please add DEBUG to drivers/input/input.c to figure out the cause\n",
81 __func__, ret);
82 return ret;
83 }
84
85 return 0;
86 }
87
88 UCLASS_DRIVER(keyboard) = {
89 .id = UCLASS_KEYBOARD,
90 .name = "keyboard",
91 .pre_probe = keyboard_pre_probe,
92 .per_device_auto = sizeof(struct keyboard_priv),
93 };
94