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path: root/drivers/media/IR/ir-raw-event.c
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Diffstat (limited to 'drivers/media/IR/ir-raw-event.c')
-rw-r--r--drivers/media/IR/ir-raw-event.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c
index d0c18db4c0d3..43094e7eccfa 100644
--- a/drivers/media/IR/ir-raw-event.c
+++ b/drivers/media/IR/ir-raw-event.c
@@ -140,6 +140,90 @@ int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type typ
140EXPORT_SYMBOL_GPL(ir_raw_event_store_edge); 140EXPORT_SYMBOL_GPL(ir_raw_event_store_edge);
141 141
142/** 142/**
143 * ir_raw_event_store_with_filter() - pass next pulse/space to decoders with some processing
144 * @input_dev: the struct input_dev device descriptor
145 * @type: the type of the event that has occurred
146 *
147 * This routine (which may be called from an interrupt context) works
148 * in similiar manner to ir_raw_event_store_edge.
149 * This routine is intended for devices with limited internal buffer
150 * It automerges samples of same type, and handles timeouts
151 */
152int ir_raw_event_store_with_filter(struct input_dev *input_dev,
153 struct ir_raw_event *ev)
154{
155 struct ir_input_dev *ir = input_get_drvdata(input_dev);
156 struct ir_raw_event_ctrl *raw = ir->raw;
157
158 if (!raw || !ir->props)
159 return -EINVAL;
160
161 /* Ignore spaces in idle mode */
162 if (ir->idle && !ev->pulse)
163 return 0;
164 else if (ir->idle)
165 ir_raw_event_set_idle(input_dev, 0);
166
167 if (!raw->this_ev.duration) {
168 raw->this_ev = *ev;
169 } else if (ev->pulse == raw->this_ev.pulse) {
170 raw->this_ev.duration += ev->duration;
171 } else {
172 ir_raw_event_store(input_dev, &raw->this_ev);
173 raw->this_ev = *ev;
174 }
175
176 /* Enter idle mode if nessesary */
177 if (!ev->pulse && ir->props->timeout &&
178 raw->this_ev.duration >= ir->props->timeout)
179 ir_raw_event_set_idle(input_dev, 1);
180 return 0;
181}
182EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter);
183
184void ir_raw_event_set_idle(struct input_dev *input_dev, int idle)
185{
186 struct ir_input_dev *ir = input_get_drvdata(input_dev);
187 struct ir_raw_event_ctrl *raw = ir->raw;
188 ktime_t now;
189 u64 delta;
190
191 if (!ir->props)
192 return;
193
194 if (!ir->raw)
195 goto out;
196
197 if (idle) {
198 IR_dprintk(2, "enter idle mode\n");
199 raw->last_event = ktime_get();
200 } else {
201 IR_dprintk(2, "exit idle mode\n");
202
203 now = ktime_get();
204 delta = ktime_to_ns(ktime_sub(now, ir->raw->last_event));
205
206 WARN_ON(raw->this_ev.pulse);
207
208 raw->this_ev.duration =
209 min(raw->this_ev.duration + delta,
210 (u64)IR_MAX_DURATION);
211
212 ir_raw_event_store(input_dev, &raw->this_ev);
213
214 if (raw->this_ev.duration == IR_MAX_DURATION)
215 ir_raw_event_reset(input_dev);
216
217 raw->this_ev.duration = 0;
218 }
219out:
220 if (ir->props->s_idle)
221 ir->props->s_idle(ir->props->priv, idle);
222 ir->idle = idle;
223}
224EXPORT_SYMBOL_GPL(ir_raw_event_set_idle);
225
226/**
143 * ir_raw_event_handle() - schedules the decoding of stored ir data 227 * ir_raw_event_handle() - schedules the decoding of stored ir data
144 * @input_dev: the struct input_dev device descriptor 228 * @input_dev: the struct input_dev device descriptor
145 * 229 *