1 /*
2 * Copyright 2023 Google LLC
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #define DT_DRV_COMPAT zephyr_input_longpress
8
9 #include <zephyr/device.h>
10 #include <zephyr/input/input.h>
11 #include <zephyr/kernel.h>
12
13 #include <zephyr/logging/log.h>
14 LOG_MODULE_REGISTER(input_longpress, CONFIG_INPUT_LOG_LEVEL);
15
16 struct longpress_config {
17 const struct device *input_dev;
18 struct longpress_data_entry *entries;
19 const uint16_t *input_codes;
20 const uint16_t *short_codes;
21 const uint16_t *long_codes;
22 uint32_t long_delays_ms;
23 uint8_t num_codes;
24 };
25
26 struct longpress_data_entry {
27 const struct device *dev;
28 struct k_work_delayable work;
29 uint8_t index;
30 bool long_fired;
31 };
32
longpress_deferred(struct k_work * work)33 static void longpress_deferred(struct k_work *work)
34 {
35 struct k_work_delayable *dwork = k_work_delayable_from_work(work);
36 struct longpress_data_entry *entry = CONTAINER_OF(
37 dwork, struct longpress_data_entry, work);
38 const struct device *dev = entry->dev;
39 const struct longpress_config *cfg = dev->config;
40 uint16_t code;
41
42 code = cfg->long_codes[entry->index];
43
44 input_report_key(dev, code, 1, true, K_FOREVER);
45
46 entry->long_fired = true;
47 }
48
longpress_cb(struct input_event * evt,void * user_data)49 static void longpress_cb(struct input_event *evt, void *user_data)
50 {
51 const struct device *dev = user_data;
52 const struct longpress_config *cfg = dev->config;
53 struct longpress_data_entry *entry;
54 int i;
55
56 if (evt->type != INPUT_EV_KEY) {
57 return;
58 }
59
60 for (i = 0; i < cfg->num_codes; i++) {
61 if (evt->code == cfg->input_codes[i]) {
62 break;
63 }
64 }
65 if (i == cfg->num_codes) {
66 LOG_DBG("ignored code %d", evt->code);
67 return;
68 }
69
70 entry = &cfg->entries[i];
71
72 if (evt->value) {
73 entry->long_fired = false;
74 k_work_schedule(&entry->work, K_MSEC(cfg->long_delays_ms));
75 } else {
76 k_work_cancel_delayable(&entry->work);
77 if (entry->long_fired) {
78 input_report_key(dev, cfg->long_codes[i], 0, true, K_FOREVER);
79 } else if (cfg->short_codes != NULL) {
80 input_report_key(dev, cfg->short_codes[i], 1, true, K_FOREVER);
81 input_report_key(dev, cfg->short_codes[i], 0, true, K_FOREVER);
82 }
83 }
84 }
85
longpress_init(const struct device * dev)86 static int longpress_init(const struct device *dev)
87 {
88 const struct longpress_config *cfg = dev->config;
89
90 if (cfg->input_dev && !device_is_ready(cfg->input_dev)) {
91 LOG_ERR("input device not ready");
92 return -ENODEV;
93 }
94
95 for (int i = 0; i < cfg->num_codes; i++) {
96 struct longpress_data_entry *entry = &cfg->entries[i];
97
98 entry->dev = dev;
99 entry->index = i;
100 k_work_init_delayable(&entry->work, longpress_deferred);
101 }
102
103 return 0;
104 }
105
106 #define INPUT_LONGPRESS_DEFINE(inst) \
107 BUILD_ASSERT((DT_INST_PROP_LEN(inst, input_codes) == \
108 DT_INST_PROP_LEN_OR(inst, short_codes, 0)) || \
109 !DT_INST_NODE_HAS_PROP(inst, short_codes)); \
110 BUILD_ASSERT(DT_INST_PROP_LEN(inst, input_codes) == DT_INST_PROP_LEN(inst, long_codes)); \
111 \
112 INPUT_CALLBACK_DEFINE_NAMED(DEVICE_DT_GET_OR_NULL(DT_INST_PHANDLE(inst, input)), \
113 longpress_cb, (void *)DEVICE_DT_INST_GET(inst), \
114 longpress_cb_##inst); \
115 \
116 static const uint16_t longpress_input_codes_##inst[] = DT_INST_PROP(inst, input_codes); \
117 \
118 IF_ENABLED(DT_INST_NODE_HAS_PROP(inst, short_codes), ( \
119 static const uint16_t longpress_short_codes_##inst[] = DT_INST_PROP(inst, short_codes); \
120 )); \
121 \
122 static const uint16_t longpress_long_codes_##inst[] = DT_INST_PROP(inst, long_codes); \
123 \
124 static struct longpress_data_entry longpress_data_entries_##inst[DT_INST_PROP_LEN( \
125 inst, input_codes)]; \
126 \
127 static const struct longpress_config longpress_config_##inst = { \
128 .input_dev = DEVICE_DT_GET_OR_NULL(DT_INST_PHANDLE(inst, input)), \
129 .entries = longpress_data_entries_##inst, \
130 .input_codes = longpress_input_codes_##inst, \
131 IF_ENABLED(DT_INST_NODE_HAS_PROP(inst, short_codes), ( \
132 .short_codes = longpress_short_codes_##inst, \
133 )) \
134 .long_codes = longpress_long_codes_##inst, \
135 .num_codes = DT_INST_PROP_LEN(inst, input_codes), \
136 .long_delays_ms = DT_INST_PROP(inst, long_delay_ms), \
137 }; \
138 \
139 DEVICE_DT_INST_DEFINE(inst, longpress_init, NULL, \
140 NULL, &longpress_config_##inst, \
141 POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, NULL);
142
143 DT_INST_FOREACH_STATUS_OKAY(INPUT_LONGPRESS_DEFINE)
144
