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path: root/drivers/media/rc/rc-raw.c
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Diffstat (limited to 'drivers/media/rc/rc-raw.c')
-rw-r--r--drivers/media/rc/rc-raw.c191
1 files changed, 90 insertions, 101 deletions
diff --git a/drivers/media/rc/rc-raw.c b/drivers/media/rc/rc-raw.c
index d6c556e3f0d8..ab9b1e4071c0 100644
--- a/drivers/media/rc/rc-raw.c
+++ b/drivers/media/rc/rc-raw.c
@@ -64,7 +64,7 @@ static int ir_raw_event_thread(void *data)
64 64
65 mutex_lock(&ir_raw_handler_lock); 65 mutex_lock(&ir_raw_handler_lock);
66 list_for_each_entry(handler, &ir_raw_handler_list, list) 66 list_for_each_entry(handler, &ir_raw_handler_list, list)
67 handler->decode(raw->input_dev, ev); 67 handler->decode(raw->dev, ev);
68 raw->prev_ev = ev; 68 raw->prev_ev = ev;
69 mutex_unlock(&ir_raw_handler_lock); 69 mutex_unlock(&ir_raw_handler_lock);
70 } 70 }
@@ -74,7 +74,7 @@ static int ir_raw_event_thread(void *data)
74 74
75/** 75/**
76 * ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders 76 * ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders
77 * @input_dev: the struct input_dev device descriptor 77 * @dev: the struct rc_dev device descriptor
78 * @ev: the struct ir_raw_event descriptor of the pulse/space 78 * @ev: the struct ir_raw_event descriptor of the pulse/space
79 * 79 *
80 * This routine (which may be called from an interrupt context) stores a 80 * This routine (which may be called from an interrupt context) stores a
@@ -82,17 +82,15 @@ static int ir_raw_event_thread(void *data)
82 * signalled as positive values and spaces as negative values. A zero value 82 * signalled as positive values and spaces as negative values. A zero value
83 * will reset the decoding state machines. 83 * will reset the decoding state machines.
84 */ 84 */
85int ir_raw_event_store(struct input_dev *input_dev, struct ir_raw_event *ev) 85int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev)
86{ 86{
87 struct ir_input_dev *ir = input_get_drvdata(input_dev); 87 if (!dev->raw)
88
89 if (!ir->raw)
90 return -EINVAL; 88 return -EINVAL;
91 89
92 IR_dprintk(2, "sample: (%05dus %s)\n", 90 IR_dprintk(2, "sample: (%05dus %s)\n",
93 TO_US(ev->duration), TO_STR(ev->pulse)); 91 TO_US(ev->duration), TO_STR(ev->pulse));
94 92
95 if (kfifo_in(&ir->raw->kfifo, ev, sizeof(*ev)) != sizeof(*ev)) 93 if (kfifo_in(&dev->raw->kfifo, ev, sizeof(*ev)) != sizeof(*ev))
96 return -ENOMEM; 94 return -ENOMEM;
97 95
98 return 0; 96 return 0;
@@ -101,7 +99,7 @@ EXPORT_SYMBOL_GPL(ir_raw_event_store);
101 99
102/** 100/**
103 * ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space 101 * ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space
104 * @input_dev: the struct input_dev device descriptor 102 * @dev: the struct rc_dev device descriptor
105 * @type: the type of the event that has occurred 103 * @type: the type of the event that has occurred
106 * 104 *
107 * This routine (which may be called from an interrupt context) is used to 105 * This routine (which may be called from an interrupt context) is used to
@@ -110,50 +108,49 @@ EXPORT_SYMBOL_GPL(ir_raw_event_store);
110 * hardware which does not provide durations directly but only interrupts 108 * hardware which does not provide durations directly but only interrupts
111 * (or similar events) on state change. 109 * (or similar events) on state change.
112 */ 110 */
113int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type) 111int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type)
114{ 112{
115 struct ir_input_dev *ir = input_get_drvdata(input_dev);
116 ktime_t now; 113 ktime_t now;
117 s64 delta; /* ns */ 114 s64 delta; /* ns */
118 struct ir_raw_event ev; 115 struct ir_raw_event ev;
119 int rc = 0; 116 int rc = 0;
120 117
121 if (!ir->raw) 118 if (!dev->raw)
122 return -EINVAL; 119 return -EINVAL;
123 120
124 now = ktime_get(); 121 now = ktime_get();
125 delta = ktime_to_ns(ktime_sub(now, ir->raw->last_event)); 122 delta = ktime_to_ns(ktime_sub(now, dev->raw->last_event));
126 123
127 /* Check for a long duration since last event or if we're 124 /* Check for a long duration since last event or if we're
128 * being called for the first time, note that delta can't 125 * being called for the first time, note that delta can't
129 * possibly be negative. 126 * possibly be negative.
130 */ 127 */
131 ev.duration = 0; 128 ev.duration = 0;
132 if (delta > IR_MAX_DURATION || !ir->raw->last_type) 129 if (delta > IR_MAX_DURATION || !dev->raw->last_type)
133 type |= IR_START_EVENT; 130 type |= IR_START_EVENT;
134 else 131 else
135 ev.duration = delta; 132 ev.duration = delta;
136 133
137 if (type & IR_START_EVENT) 134 if (type & IR_START_EVENT)
138 ir_raw_event_reset(input_dev); 135 ir_raw_event_reset(dev);
139 else if (ir->raw->last_type & IR_SPACE) { 136 else if (dev->raw->last_type & IR_SPACE) {
140 ev.pulse = false; 137 ev.pulse = false;
141 rc = ir_raw_event_store(input_dev, &ev); 138 rc = ir_raw_event_store(dev, &ev);
142 } else if (ir->raw->last_type & IR_PULSE) { 139 } else if (dev->raw->last_type & IR_PULSE) {
143 ev.pulse = true; 140 ev.pulse = true;
144 rc = ir_raw_event_store(input_dev, &ev); 141 rc = ir_raw_event_store(dev, &ev);
145 } else 142 } else
146 return 0; 143 return 0;
147 144
148 ir->raw->last_event = now; 145 dev->raw->last_event = now;
149 ir->raw->last_type = type; 146 dev->raw->last_type = type;
150 return rc; 147 return rc;
151} 148}
152EXPORT_SYMBOL_GPL(ir_raw_event_store_edge); 149EXPORT_SYMBOL_GPL(ir_raw_event_store_edge);
153 150
154/** 151/**
155 * ir_raw_event_store_with_filter() - pass next pulse/space to decoders with some processing 152 * ir_raw_event_store_with_filter() - pass next pulse/space to decoders with some processing
156 * @input_dev: the struct input_dev device descriptor 153 * @dev: the struct rc_dev device descriptor
157 * @type: the type of the event that has occurred 154 * @type: the type of the event that has occurred
158 * 155 *
159 * This routine (which may be called from an interrupt context) works 156 * This routine (which may be called from an interrupt context) works
@@ -161,84 +158,76 @@ EXPORT_SYMBOL_GPL(ir_raw_event_store_edge);
161 * This routine is intended for devices with limited internal buffer 158 * This routine is intended for devices with limited internal buffer
162 * It automerges samples of same type, and handles timeouts 159 * It automerges samples of same type, and handles timeouts
163 */ 160 */
164int ir_raw_event_store_with_filter(struct input_dev *input_dev, 161int ir_raw_event_store_with_filter(struct rc_dev *dev, struct ir_raw_event *ev)
165 struct ir_raw_event *ev)
166{ 162{
167 struct ir_input_dev *ir = input_get_drvdata(input_dev); 163 if (!dev->raw)
168 struct ir_raw_event_ctrl *raw = ir->raw;
169
170 if (!raw || !ir->props)
171 return -EINVAL; 164 return -EINVAL;
172 165
173 /* Ignore spaces in idle mode */ 166 /* Ignore spaces in idle mode */
174 if (ir->idle && !ev->pulse) 167 if (dev->idle && !ev->pulse)
175 return 0; 168 return 0;
176 else if (ir->idle) 169 else if (dev->idle)
177 ir_raw_event_set_idle(input_dev, false); 170 ir_raw_event_set_idle(dev, false);
178 171
179 if (!raw->this_ev.duration) { 172 if (!dev->raw->this_ev.duration)
180 raw->this_ev = *ev; 173 dev->raw->this_ev = *ev;
181 } else if (ev->pulse == raw->this_ev.pulse) { 174 else if (ev->pulse == dev->raw->this_ev.pulse)
182 raw->this_ev.duration += ev->duration; 175 dev->raw->this_ev.duration += ev->duration;
183 } else { 176 else {
184 ir_raw_event_store(input_dev, &raw->this_ev); 177 ir_raw_event_store(dev, &dev->raw->this_ev);
185 raw->this_ev = *ev; 178 dev->raw->this_ev = *ev;
186 } 179 }
187 180
188 /* Enter idle mode if nessesary */ 181 /* Enter idle mode if nessesary */
189 if (!ev->pulse && ir->props->timeout && 182 if (!ev->pulse && dev->timeout &&
190 raw->this_ev.duration >= ir->props->timeout) { 183 dev->raw->this_ev.duration >= dev->timeout)
191 ir_raw_event_set_idle(input_dev, true); 184 ir_raw_event_set_idle(dev, true);
192 } 185
193 return 0; 186 return 0;
194} 187}
195EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter); 188EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter);
196 189
197/** 190/**
198 * ir_raw_event_set_idle() - hint the ir core if device is receiving 191 * ir_raw_event_set_idle() - provide hint to rc-core when the device is idle or not
199 * IR data or not 192 * @dev: the struct rc_dev device descriptor
200 * @input_dev: the struct input_dev device descriptor 193 * @idle: whether the device is idle or not
201 * @idle: the hint value
202 */ 194 */
203void ir_raw_event_set_idle(struct input_dev *input_dev, bool idle) 195void ir_raw_event_set_idle(struct rc_dev *dev, bool idle)
204{ 196{
205 struct ir_input_dev *ir = input_get_drvdata(input_dev); 197 if (!dev->raw)
206 struct ir_raw_event_ctrl *raw = ir->raw;
207
208 if (!ir->props || !ir->raw)
209 return; 198 return;
210 199
211 IR_dprintk(2, "%s idle mode\n", idle ? "enter" : "leave"); 200 IR_dprintk(2, "%s idle mode\n", idle ? "enter" : "leave");
212 201
213 if (idle) { 202 if (idle) {
214 raw->this_ev.timeout = true; 203 dev->raw->this_ev.timeout = true;
215 ir_raw_event_store(input_dev, &raw->this_ev); 204 ir_raw_event_store(dev, &dev->raw->this_ev);
216 init_ir_raw_event(&raw->this_ev); 205 init_ir_raw_event(&dev->raw->this_ev);
217 } 206 }
218 207
219 if (ir->props->s_idle) 208 if (dev->s_idle)
220 ir->props->s_idle(ir->props->priv, idle); 209 dev->s_idle(dev, idle);
221 ir->idle = idle; 210
211 dev->idle = idle;
222} 212}
223EXPORT_SYMBOL_GPL(ir_raw_event_set_idle); 213EXPORT_SYMBOL_GPL(ir_raw_event_set_idle);
224 214
225/** 215/**
226 * ir_raw_event_handle() - schedules the decoding of stored ir data 216 * ir_raw_event_handle() - schedules the decoding of stored ir data
227 * @input_dev: the struct input_dev device descriptor 217 * @dev: the struct rc_dev device descriptor
228 * 218 *
229 * This routine will signal the workqueue to start decoding stored ir data. 219 * This routine will tell rc-core to start decoding stored ir data.
230 */ 220 */
231void ir_raw_event_handle(struct input_dev *input_dev) 221void ir_raw_event_handle(struct rc_dev *dev)
232{ 222{
233 struct ir_input_dev *ir = input_get_drvdata(input_dev);
234 unsigned long flags; 223 unsigned long flags;
235 224
236 if (!ir->raw) 225 if (!dev->raw)
237 return; 226 return;
238 227
239 spin_lock_irqsave(&ir->raw->lock, flags); 228 spin_lock_irqsave(&dev->raw->lock, flags);
240 wake_up_process(ir->raw->thread); 229 wake_up_process(dev->raw->thread);
241 spin_unlock_irqrestore(&ir->raw->lock, flags); 230 spin_unlock_irqrestore(&dev->raw->lock, flags);
242} 231}
243EXPORT_SYMBOL_GPL(ir_raw_event_handle); 232EXPORT_SYMBOL_GPL(ir_raw_event_handle);
244 233
@@ -256,69 +245,69 @@ ir_raw_get_allowed_protocols()
256/* 245/*
257 * Used to (un)register raw event clients 246 * Used to (un)register raw event clients
258 */ 247 */
259int ir_raw_event_register(struct input_dev *input_dev) 248int ir_raw_event_register(struct rc_dev *dev)
260{ 249{
261 struct ir_input_dev *ir = input_get_drvdata(input_dev);
262 int rc; 250 int rc;
263 struct ir_raw_handler *handler; 251 struct ir_raw_handler *handler;
264 252
265 ir->raw = kzalloc(sizeof(*ir->raw), GFP_KERNEL); 253 if (!dev)
266 if (!ir->raw) 254 return -EINVAL;
267 return -ENOMEM;
268 255
269 ir->raw->input_dev = input_dev; 256 dev->raw = kzalloc(sizeof(*dev->raw), GFP_KERNEL);
257 if (!dev->raw)
258 return -ENOMEM;
270 259
271 ir->raw->enabled_protocols = ~0; 260 dev->raw->dev = dev;
272 rc = kfifo_alloc(&ir->raw->kfifo, sizeof(s64) * MAX_IR_EVENT_SIZE, 261 dev->raw->enabled_protocols = ~0;
262 rc = kfifo_alloc(&dev->raw->kfifo,
263 sizeof(struct ir_raw_event) * MAX_IR_EVENT_SIZE,
273 GFP_KERNEL); 264 GFP_KERNEL);
274 if (rc < 0) { 265 if (rc < 0)
275 kfree(ir->raw); 266 goto out;
276 ir->raw = NULL;
277 return rc;
278 }
279 267
280 spin_lock_init(&ir->raw->lock); 268 spin_lock_init(&dev->raw->lock);
281 ir->raw->thread = kthread_run(ir_raw_event_thread, ir->raw, 269 dev->raw->thread = kthread_run(ir_raw_event_thread, dev->raw,
282 "rc%u", (unsigned int)ir->devno); 270 "rc%ld", dev->devno);
283 271
284 if (IS_ERR(ir->raw->thread)) { 272 if (IS_ERR(dev->raw->thread)) {
285 int ret = PTR_ERR(ir->raw->thread); 273 rc = PTR_ERR(dev->raw->thread);
286 274 goto out;
287 kfree(ir->raw);
288 ir->raw = NULL;
289 return ret;
290 } 275 }
291 276
292 mutex_lock(&ir_raw_handler_lock); 277 mutex_lock(&ir_raw_handler_lock);
293 list_add_tail(&ir->raw->list, &ir_raw_client_list); 278 list_add_tail(&dev->raw->list, &ir_raw_client_list);
294 list_for_each_entry(handler, &ir_raw_handler_list, list) 279 list_for_each_entry(handler, &ir_raw_handler_list, list)
295 if (handler->raw_register) 280 if (handler->raw_register)
296 handler->raw_register(ir->raw->input_dev); 281 handler->raw_register(dev);
297 mutex_unlock(&ir_raw_handler_lock); 282 mutex_unlock(&ir_raw_handler_lock);
298 283
299 return 0; 284 return 0;
285
286out:
287 kfree(dev->raw);
288 dev->raw = NULL;
289 return rc;
300} 290}
301 291
302void ir_raw_event_unregister(struct input_dev *input_dev) 292void ir_raw_event_unregister(struct rc_dev *dev)
303{ 293{
304 struct ir_input_dev *ir = input_get_drvdata(input_dev);
305 struct ir_raw_handler *handler; 294 struct ir_raw_handler *handler;
306 295
307 if (!ir->raw) 296 if (!dev || !dev->raw)
308 return; 297 return;
309 298
310 kthread_stop(ir->raw->thread); 299 kthread_stop(dev->raw->thread);
311 300
312 mutex_lock(&ir_raw_handler_lock); 301 mutex_lock(&ir_raw_handler_lock);
313 list_del(&ir->raw->list); 302 list_del(&dev->raw->list);
314 list_for_each_entry(handler, &ir_raw_handler_list, list) 303 list_for_each_entry(handler, &ir_raw_handler_list, list)
315 if (handler->raw_unregister) 304 if (handler->raw_unregister)
316 handler->raw_unregister(ir->raw->input_dev); 305 handler->raw_unregister(dev);
317 mutex_unlock(&ir_raw_handler_lock); 306 mutex_unlock(&ir_raw_handler_lock);
318 307
319 kfifo_free(&ir->raw->kfifo); 308 kfifo_free(&dev->raw->kfifo);
320 kfree(ir->raw); 309 kfree(dev->raw);
321 ir->raw = NULL; 310 dev->raw = NULL;
322} 311}
323 312
324/* 313/*
@@ -333,7 +322,7 @@ int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler)
333 list_add_tail(&ir_raw_handler->list, &ir_raw_handler_list); 322 list_add_tail(&ir_raw_handler->list, &ir_raw_handler_list);
334 if (ir_raw_handler->raw_register) 323 if (ir_raw_handler->raw_register)
335 list_for_each_entry(raw, &ir_raw_client_list, list) 324 list_for_each_entry(raw, &ir_raw_client_list, list)
336 ir_raw_handler->raw_register(raw->input_dev); 325 ir_raw_handler->raw_register(raw->dev);
337 available_protocols |= ir_raw_handler->protocols; 326 available_protocols |= ir_raw_handler->protocols;
338 mutex_unlock(&ir_raw_handler_lock); 327 mutex_unlock(&ir_raw_handler_lock);
339 328
@@ -349,7 +338,7 @@ void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler)
349 list_del(&ir_raw_handler->list); 338 list_del(&ir_raw_handler->list);
350 if (ir_raw_handler->raw_unregister) 339 if (ir_raw_handler->raw_unregister)
351 list_for_each_entry(raw, &ir_raw_client_list, list) 340 list_for_each_entry(raw, &ir_raw_client_list, list)
352 ir_raw_handler->raw_unregister(raw->input_dev); 341 ir_raw_handler->raw_unregister(raw->dev);
353 available_protocols &= ~ir_raw_handler->protocols; 342 available_protocols &= ~ir_raw_handler->protocols;
354 mutex_unlock(&ir_raw_handler_lock); 343 mutex_unlock(&ir_raw_handler_lock);
355} 344}