update module for more matrix-flags
[ms2-fixes] / debounce.c
1 #include <linux/module.h>
2 #include <linux/device.h>
3 #include <linux/platform_device.h>
4 #include <linux/gpio_event.h>
5
6 #define PREFIX "debounce: "
7
8 static unsigned old_flags = 0;
9 ktime_t old_debounce_delay;
10 ktime_t old_settle_time;
11 ktime_t old_poll_time;
12 static struct gpio_event_matrix_info *gpio_evmi = NULL;
13
14 static int find_ms2_dev(struct device *dev, void *data)
15 {
16 if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) {
17 printk(KERN_INFO PREFIX "Found it\n");
18 return 1;
19 }
20 return 0;
21 }
22
23 static ssize_t show_debounce_delay(struct device *dev, struct device_attribute *attr, char *buf)
24 {
25 if (!gpio_evmi)
26 return -ENODEV;
27
28 return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->debounce_delay.tv.nsec / NSEC_PER_MSEC));
29 }
30
31 static void set_debounce_delay(long delay)
32 {
33 if (gpio_evmi->debounce_delay.tv.nsec != delay * NSEC_PER_MSEC) {
34 printk(KERN_INFO PREFIX "Changing debounce_delay\n");
35 gpio_evmi->debounce_delay.tv.nsec = delay * NSEC_PER_MSEC;
36 printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
37 }
38
39 #if 0
40 if (gpio_evmi->debounce_delay.tv.nsec != 0) {
41 if (!(gpio_evmi->flags & GPIOKPF_DEBOUNCE)) {
42 printk(KERN_INFO PREFIX "Activating debounce\n");
43 gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
44 }
45 } else {
46 if (gpio_evmi->flags & GPIOKPF_DEBOUNCE) {
47 printk(KERN_INFO PREFIX "Deactivating debounce\n");
48 gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
49 }
50 }
51 #endif
52 }
53
54 static ssize_t store_debounce_delay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
55 {
56 long int delay;
57
58 if (!gpio_evmi)
59 return -ENODEV;
60
61 sscanf(buf, "%ld", &delay);
62 set_debounce_delay(delay);
63
64 return count;
65 }
66
67 static ssize_t show_settle_time(struct device *dev, struct device_attribute *attr, char *buf)
68 {
69 if (!gpio_evmi)
70 return -ENODEV;
71
72 return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->settle_time.tv.nsec / NSEC_PER_USEC));
73 }
74
75 static ssize_t store_settle_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
76 {
77 long int delay;
78
79 if (!gpio_evmi)
80 return -ENODEV;
81
82 sscanf(buf, "%ld", &delay);
83 gpio_evmi->settle_time.tv.nsec = delay * NSEC_PER_USEC;
84
85 return count;
86 }
87
88 static ssize_t show_poll_time(struct device *dev, struct device_attribute *attr, char *buf)
89 {
90 if (!gpio_evmi)
91 return -ENODEV;
92
93 return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->poll_time.tv.nsec / NSEC_PER_MSEC));
94 }
95
96 static ssize_t store_poll_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
97 {
98 long int delay;
99
100 if (!gpio_evmi)
101 return -ENODEV;
102
103 sscanf(buf, "%ld", &delay);
104 gpio_evmi->poll_time.tv.nsec = delay * NSEC_PER_MSEC;
105
106 return count;
107 }
108
109 static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf)
110 {
111 if (!gpio_evmi)
112 return -ENODEV;
113
114 return snprintf(buf, PAGE_SIZE, "0x%x\n", gpio_evmi->flags);
115 }
116
117 static ssize_t store_flags(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
118 {
119 unsigned flags;
120
121 if (!gpio_evmi)
122 return -ENODEV;
123
124 sscanf(buf, "0x%x", &flags);
125
126 printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);
127
128 gpio_evmi->flags = flags;
129
130 return count;
131 }
132
133 static ssize_t show_debounce_flag(struct device *dev, struct device_attribute *attr, char *buf)
134 {
135 if (!gpio_evmi)
136 return -ENODEV;
137
138 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DEBOUNCE) ? 1 : 0);
139 }
140
141 static ssize_t store_debounce_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
142 {
143 unsigned flag;
144
145 if (!gpio_evmi)
146 return -ENODEV;
147
148 sscanf(buf, "%u", &flag);
149
150 if (flag) {
151 gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
152 } else {
153 gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
154 }
155
156 return count;
157 }
158
159 static ssize_t show_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
160 {
161 if (!gpio_evmi)
162 return -ENODEV;
163
164 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_REMOVE_SOME_PHANTOM_KEYS) ? 1 : 0);
165 }
166
167 static ssize_t store_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
168 {
169 unsigned flag;
170
171 if (!gpio_evmi)
172 return -ENODEV;
173
174 sscanf(buf, "%u", &flag);
175
176 if (flag) {
177 gpio_evmi->flags |= GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
178 } else {
179 gpio_evmi->flags &= ~GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
180 }
181
182 return count;
183 }
184
185 static ssize_t show_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
186 {
187 if (!gpio_evmi)
188 return -ENODEV;
189
190 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_UNMAPPED_KEYS) ? 1 : 0);
191 }
192
193 static ssize_t store_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
194 {
195 unsigned flag;
196
197 if (!gpio_evmi)
198 return -ENODEV;
199
200 sscanf(buf, "%u", &flag);
201
202 if (flag) {
203 gpio_evmi->flags |= GPIOKPF_PRINT_UNMAPPED_KEYS;
204 } else {
205 gpio_evmi->flags &= ~GPIOKPF_PRINT_UNMAPPED_KEYS;
206 }
207
208 return count;
209 }
210
211 static ssize_t show_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
212 {
213 if (!gpio_evmi)
214 return -ENODEV;
215
216 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_MAPPED_KEYS) ? 1 : 0);
217 }
218
219 static ssize_t store_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
220 {
221 unsigned flag;
222
223 if (!gpio_evmi)
224 return -ENODEV;
225
226 sscanf(buf, "%u", &flag);
227
228 if (flag) {
229 gpio_evmi->flags |= GPIOKPF_PRINT_MAPPED_KEYS;
230 } else {
231 gpio_evmi->flags &= ~GPIOKPF_PRINT_MAPPED_KEYS;
232 }
233
234 return count;
235 }
236
237 static ssize_t show_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
238 {
239 if (!gpio_evmi)
240 return -ENODEV;
241
242 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_PHANTOM_KEYS) ? 1 : 0);
243 }
244
245 static ssize_t store_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
246 {
247 unsigned flag;
248
249 if (!gpio_evmi)
250 return -ENODEV;
251
252 sscanf(buf, "%u", &flag);
253
254 if (flag) {
255 gpio_evmi->flags |= GPIOKPF_PRINT_PHANTOM_KEYS;
256 } else {
257 gpio_evmi->flags &= ~GPIOKPF_PRINT_PHANTOM_KEYS;
258 }
259
260 return count;
261 }
262
263 static ssize_t show_active_high_flag(struct device *dev, struct device_attribute *attr, char *buf)
264 {
265 if (!gpio_evmi)
266 return -ENODEV;
267
268 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_ACTIVE_HIGH) ? 1 : 0);
269 }
270
271 static ssize_t store_active_high_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
272 {
273 unsigned flag;
274
275 if (!gpio_evmi)
276 return -ENODEV;
277
278 sscanf(buf, "%u", &flag);
279
280 if (flag) {
281 gpio_evmi->flags |= GPIOKPF_ACTIVE_HIGH;
282 } else {
283 gpio_evmi->flags &= ~GPIOKPF_ACTIVE_HIGH;
284 }
285
286 return count;
287 }
288
289 static ssize_t show_drive_inactive_flag(struct device *dev, struct device_attribute *attr, char *buf)
290 {
291 if (!gpio_evmi)
292 return -ENODEV;
293
294 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DRIVE_INACTIVE) ? 1 : 0);
295 }
296
297 static ssize_t store_drive_inactive_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
298 {
299 unsigned flag;
300
301 if (!gpio_evmi)
302 return -ENODEV;
303
304 sscanf(buf, "%u", &flag);
305
306 if (flag) {
307 gpio_evmi->flags |= GPIOKPF_DRIVE_INACTIVE;
308 } else {
309 gpio_evmi->flags &= ~GPIOKPF_DRIVE_INACTIVE;
310 }
311
312 return count;
313 }
314
315 static DEVICE_ATTR(debounce_delay, (S_IRUGO | S_IWUGO), show_debounce_delay, store_debounce_delay);
316 static DEVICE_ATTR(settle_time, (S_IRUGO | S_IWUGO), show_settle_time, store_settle_time);
317 static DEVICE_ATTR(poll_time, (S_IRUGO | S_IWUGO), show_poll_time, store_poll_time);
318 static DEVICE_ATTR(flags, (S_IRUGO), show_flags, store_flags);
319 static DEVICE_ATTR(debounce_flag, (S_IRUGO | S_IWUGO), show_debounce_flag, store_debounce_flag);
320 static DEVICE_ATTR(remove_some_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_remove_some_phantom_keys_flag, store_remove_some_phantom_keys_flag);
321 static DEVICE_ATTR(print_unmapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_unmapped_keys_flag, store_print_unmapped_keys_flag);
322 static DEVICE_ATTR(print_mapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_mapped_keys_flag, store_print_mapped_keys_flag);
323 static DEVICE_ATTR(print_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_print_phantom_keys_flag, store_print_phantom_keys_flag);
324 static DEVICE_ATTR(active_high_flag, (S_IRUGO), show_active_high_flag, store_active_high_flag);
325 static DEVICE_ATTR(drive_inactive_flag, (S_IRUGO | S_IWUGO), show_drive_inactive_flag, store_drive_inactive_flag);
326
327 static void debounce_release(struct device *dev)
328 {
329 }
330
331 static struct device debounce_device = {
332 .init_name = "debounce",
333 .release = debounce_release,
334 };
335
336 static int __init debounce_init(void)
337 {
338 struct device *event_dev = NULL;
339 struct gpio_event_platform_data *gpio_epd;
340 struct gpio_event_info *gpio_ei;
341 int err = 0;
342
343 printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n");
344
345 event_dev = device_find_child(&platform_bus, GPIO_EVENT_DEV_NAME, find_ms2_dev);
346 if (event_dev == NULL)
347 return -ENODEV;
348
349 gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data;
350 printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name);
351 if (strcmp(gpio_epd->name, "sholes-keypad"))
352 return -ENODEV;
353
354 gpio_ei = (struct gpio_event_info*)gpio_epd->info[0];
355 gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info);
356
357 err = device_register(&debounce_device);
358 if (err) {
359 return err;
360 }
361
362 err = device_create_file(&debounce_device, &dev_attr_debounce_delay);
363 err = device_create_file(&debounce_device, &dev_attr_settle_time);
364 err = device_create_file(&debounce_device, &dev_attr_poll_time);
365 err = device_create_file(&debounce_device, &dev_attr_flags);
366 err = device_create_file(&debounce_device, &dev_attr_debounce_flag);
367 err = device_create_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
368 err = device_create_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
369 err = device_create_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
370 err = device_create_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
371 err = device_create_file(&debounce_device, &dev_attr_active_high_flag);
372 err = device_create_file(&debounce_device, &dev_attr_drive_inactive_flag);
373
374 printk(KERN_INFO PREFIX "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec);
375 printk(KERN_INFO PREFIX "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec);
376 printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
377 printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
378
379 old_debounce_delay = gpio_evmi->debounce_delay;
380 old_settle_time = gpio_evmi->settle_time;
381 old_poll_time = gpio_evmi->poll_time;
382 old_flags = gpio_evmi->flags;
383
384 printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
385
386 return 0;
387 }
388
389 static void __exit debounce_exit(void)
390 {
391 if (gpio_evmi) {
392 if (gpio_evmi->debounce_delay.tv.nsec != old_debounce_delay.tv.nsec) {
393 printk(KERN_INFO PREFIX "Restoring debounce_delay\n");
394 gpio_evmi->debounce_delay = old_debounce_delay;
395 printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
396 }
397 if (gpio_evmi->flags != old_flags) {
398 printk(KERN_INFO PREFIX "Restoring flags\n");
399 gpio_evmi->flags = old_flags;
400 printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
401 }
402 gpio_evmi->settle_time = old_settle_time;
403 gpio_evmi->poll_time = old_poll_time;
404 }
405 device_remove_file(&debounce_device, &dev_attr_debounce_delay);
406 device_remove_file(&debounce_device, &dev_attr_settle_time);
407 device_remove_file(&debounce_device, &dev_attr_poll_time);
408 device_remove_file(&debounce_device, &dev_attr_flags);
409 device_remove_file(&debounce_device, &dev_attr_debounce_flag);
410 device_remove_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
411 device_remove_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
412 device_remove_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
413 device_remove_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
414 device_remove_file(&debounce_device, &dev_attr_active_high_flag);
415 device_remove_file(&debounce_device, &dev_attr_drive_inactive_flag);
416 device_unregister(&debounce_device);
417 }
418
419 module_init(debounce_init);
420 module_exit(debounce_exit);
421
422 MODULE_LICENSE("GPL");
423 MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>");
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