add simple script to update phone using adb
[ms2-fixes] / debounce.c
CommitLineData
b422e333 1#include <linux/module.h>
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2#include <linux/device.h>
3#include <linux/platform_device.h>
4#include <linux/gpio_event.h>
5
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6#define PREFIX "debounce: "
7
a4838b14 8static unsigned old_flags = 0;
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9ktime_t old_debounce_delay;
10ktime_t old_settle_time;
11ktime_t old_poll_time;
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12static struct gpio_event_matrix_info *gpio_evmi = NULL;
13
ab5ed215 14static int find_ms2_dev(struct device *dev, void *data)
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15{
16 if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) {
ab5ed215 17 printk(KERN_INFO PREFIX "Found it\n");
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18 return 1;
19 }
20 return 0;
21}
b422e333 22
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23static 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
31static 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;
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36 printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
37 }
38
fc215caa 39#if 0
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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 }
fc215caa 51#endif
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52}
53
54static 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
fc215caa 64 return count;
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65}
66
67static 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
75static 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
fc215caa 85 return count;
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86}
87
88static 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
96static 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
fc215caa 106 return count;
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107}
108
109static 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
117static 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);
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125
126 printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);
127
128 if (flags & GPIOKPF_DRIVE_INACTIVE)
129 return count;
130
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131 gpio_evmi->flags = flags;
132
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133 return count;
134}
135
136static ssize_t show_debounce_flag(struct device *dev, struct device_attribute *attr, char *buf)
137{
138 if (!gpio_evmi)
139 return -ENODEV;
140
141 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DEBOUNCE) ? 1 : 0);
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142}
143
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144static ssize_t store_debounce_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
145{
146 unsigned flag;
147
148 if (!gpio_evmi)
149 return -ENODEV;
150
151 sscanf(buf, "%u", &flag);
152
153 if (flag) {
154 gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
155 } else {
156 gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
157 }
158
159 return count;
160}
161
162static ssize_t show_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
163{
164 if (!gpio_evmi)
165 return -ENODEV;
166
167 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_REMOVE_SOME_PHANTOM_KEYS) ? 1 : 0);
168}
169
170static ssize_t store_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
171{
172 unsigned flag;
173
174 if (!gpio_evmi)
175 return -ENODEV;
176
177 sscanf(buf, "%u", &flag);
178
179 if (flag) {
180 gpio_evmi->flags |= GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
181 } else {
182 gpio_evmi->flags &= ~GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
183 }
184
185 return count;
186}
187
188static ssize_t show_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
189{
190 if (!gpio_evmi)
191 return -ENODEV;
192
193 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_UNMAPPED_KEYS) ? 1 : 0);
194}
195
196static ssize_t store_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
197{
198 unsigned flag;
199
200 if (!gpio_evmi)
201 return -ENODEV;
202
203 sscanf(buf, "%u", &flag);
204
205 if (flag) {
206 gpio_evmi->flags |= GPIOKPF_PRINT_UNMAPPED_KEYS;
207 } else {
208 gpio_evmi->flags &= ~GPIOKPF_PRINT_UNMAPPED_KEYS;
209 }
210
211 return count;
212}
213
214static ssize_t show_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
215{
216 if (!gpio_evmi)
217 return -ENODEV;
218
219 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_MAPPED_KEYS) ? 1 : 0);
220}
221
222static ssize_t store_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
223{
224 unsigned flag;
225
226 if (!gpio_evmi)
227 return -ENODEV;
228
229 sscanf(buf, "%u", &flag);
230
231 if (flag) {
232 gpio_evmi->flags |= GPIOKPF_PRINT_MAPPED_KEYS;
233 } else {
234 gpio_evmi->flags &= ~GPIOKPF_PRINT_MAPPED_KEYS;
235 }
236
237 return count;
238}
239
240static ssize_t show_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
241{
242 if (!gpio_evmi)
243 return -ENODEV;
244
245 return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_PHANTOM_KEYS) ? 1 : 0);
246}
247
248static ssize_t store_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
249{
250 unsigned flag;
251
252 if (!gpio_evmi)
253 return -ENODEV;
254
255 sscanf(buf, "%u", &flag);
256
257 if (flag) {
258 gpio_evmi->flags |= GPIOKPF_PRINT_PHANTOM_KEYS;
259 } else {
260 gpio_evmi->flags &= ~GPIOKPF_PRINT_PHANTOM_KEYS;
261 }
262
263 return count;
264}
265
266static DEVICE_ATTR(debounce_delay, (S_IRUGO | S_IWUGO), show_debounce_delay, store_debounce_delay);
267static DEVICE_ATTR(settle_time, (S_IRUGO | S_IWUGO), show_settle_time, store_settle_time);
268static DEVICE_ATTR(poll_time, (S_IRUGO | S_IWUGO), show_poll_time, store_poll_time);
269static DEVICE_ATTR(flags, (S_IRUGO), show_flags, store_flags);
270static DEVICE_ATTR(debounce_flag, (S_IRUGO | S_IWUGO), show_debounce_flag, store_debounce_flag);
271static DEVICE_ATTR(remove_some_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_remove_some_phantom_keys_flag, store_remove_some_phantom_keys_flag);
272static DEVICE_ATTR(print_unmapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_unmapped_keys_flag, store_print_unmapped_keys_flag);
273static DEVICE_ATTR(print_mapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_mapped_keys_flag, store_print_mapped_keys_flag);
274static DEVICE_ATTR(print_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_print_phantom_keys_flag, store_print_phantom_keys_flag);
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275
276static void debounce_release(struct device *dev)
277{
278}
279
280static struct device debounce_device = {
281 .init_name = "debounce",
282 .release = debounce_release,
283};
284
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285static int __init debounce_init(void)
286{
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287 struct device *event_dev = NULL;
288 struct gpio_event_platform_data *gpio_epd;
289 struct gpio_event_info *gpio_ei;
f7cb07b2 290 int err = 0;
d1ff9643 291
ab5ed215 292 printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n");
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293
294 event_dev = device_find_child(&platform_bus, GPIO_EVENT_DEV_NAME, find_ms2_dev);
295 if (event_dev == NULL)
296 return -ENODEV;
297
298 gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data;
ab5ed215 299 printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name);
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300 if (strcmp(gpio_epd->name, "sholes-keypad"))
301 return -ENODEV;
302
303 gpio_ei = (struct gpio_event_info*)gpio_epd->info[0];
304 gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info);
305
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306 err = device_register(&debounce_device);
307 if (err) {
308 return err;
309 }
310
311 err = device_create_file(&debounce_device, &dev_attr_debounce_delay);
312 err = device_create_file(&debounce_device, &dev_attr_settle_time);
313 err = device_create_file(&debounce_device, &dev_attr_poll_time);
314 err = device_create_file(&debounce_device, &dev_attr_flags);
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315 err = device_create_file(&debounce_device, &dev_attr_debounce_flag);
316 err = device_create_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
317 err = device_create_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
318 err = device_create_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
319 err = device_create_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
f7cb07b2 320
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321 printk(KERN_INFO PREFIX "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec);
322 printk(KERN_INFO PREFIX "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec);
323 printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
324 printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
20bf1c9e 325
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326 old_debounce_delay = gpio_evmi->debounce_delay;
327 old_settle_time = gpio_evmi->settle_time;
328 old_poll_time = gpio_evmi->poll_time;
329 old_flags = gpio_evmi->flags;
1e65c113 330
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331 printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
332
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333 return 0;
334}
335
336static void __exit debounce_exit(void)
337{
1e65c113 338 if (gpio_evmi) {
bb65757a 339 if (gpio_evmi->debounce_delay.tv.nsec != old_debounce_delay.tv.nsec) {
1e65c113 340 printk(KERN_INFO PREFIX "Restoring debounce_delay\n");
bb65757a 341 gpio_evmi->debounce_delay = old_debounce_delay;
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342 printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
343 }
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344 if (gpio_evmi->flags != old_flags) {
345 printk(KERN_INFO PREFIX "Restoring flags\n");
346 gpio_evmi->flags = old_flags;
347 printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
348 }
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349 gpio_evmi->settle_time = old_settle_time;
350 gpio_evmi->poll_time = old_poll_time;
1e65c113 351 }
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352 device_remove_file(&debounce_device, &dev_attr_debounce_delay);
353 device_remove_file(&debounce_device, &dev_attr_settle_time);
354 device_remove_file(&debounce_device, &dev_attr_poll_time);
355 device_remove_file(&debounce_device, &dev_attr_flags);
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356 device_remove_file(&debounce_device, &dev_attr_debounce_flag);
357 device_remove_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
358 device_remove_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
359 device_remove_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
360 device_remove_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
f7cb07b2 361 device_unregister(&debounce_device);
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362}
363
364module_init(debounce_init);
365module_exit(debounce_exit);
366
367MODULE_LICENSE("GPL");
368MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>");
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