[ms2-fixes] / debounce.c

#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/gpio_event.h>

#define PREFIX "debounce: "

static unsigned old_flags = 0;
ktime_t old_debounce_delay;
ktime_t old_settle_time;
ktime_t old_poll_time;
static struct gpio_event_matrix_info *gpio_evmi = NULL;

static int find_ms2_dev(struct device *dev, void *data)
{
	if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) {
		printk(KERN_INFO PREFIX "Found it\n");
		return 1;
	}
	return 0;
}

static ssize_t show_debounce_delay(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->debounce_delay.tv.nsec / NSEC_PER_MSEC));
}

static void set_debounce_delay(long delay)
{
	if (gpio_evmi->debounce_delay.tv.nsec != delay * NSEC_PER_MSEC) {
		printk(KERN_INFO PREFIX "Changing debounce_delay\n");
		gpio_evmi->debounce_delay.tv.nsec = delay * NSEC_PER_MSEC;
		printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	}

#if 0
	if (gpio_evmi->debounce_delay.tv.nsec != 0) {
		if (!(gpio_evmi->flags & GPIOKPF_DEBOUNCE)) {
			printk(KERN_INFO PREFIX "Activating debounce\n");
			gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
		}
	} else {
		if (gpio_evmi->flags & GPIOKPF_DEBOUNCE) {
			printk(KERN_INFO PREFIX "Deactivating debounce\n");
			gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
		}
	}
#endif
}

static ssize_t store_debounce_delay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	long int delay;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%ld", &delay);
	set_debounce_delay(delay);

	return count;
}

static ssize_t show_settle_time(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->settle_time.tv.nsec / NSEC_PER_USEC));
}

static ssize_t store_settle_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	long int delay;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%ld", &delay);
	gpio_evmi->settle_time.tv.nsec = delay * NSEC_PER_USEC;

	return count;
}

static ssize_t show_poll_time(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->poll_time.tv.nsec / NSEC_PER_MSEC));
}

static ssize_t store_poll_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	long int delay;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%ld", &delay);
	gpio_evmi->poll_time.tv.nsec = delay * NSEC_PER_MSEC;

	return count;
}

static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "0x%x\n", gpio_evmi->flags);
}

static ssize_t store_flags(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flags;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "0x%x", &flags);

	printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);

	gpio_evmi->flags = flags;

	return count;
}

static ssize_t show_debounce_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DEBOUNCE) ? 1 : 0);
}

static ssize_t store_debounce_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
	}

	return count;
}

static ssize_t show_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_REMOVE_SOME_PHANTOM_KEYS) ? 1 : 0);
}

static ssize_t store_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
	}

	return count;
}

static ssize_t show_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_UNMAPPED_KEYS) ? 1 : 0);
}

static ssize_t store_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_PRINT_UNMAPPED_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_PRINT_UNMAPPED_KEYS;
	}

	return count;
}

static ssize_t show_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_MAPPED_KEYS) ? 1 : 0);
}

static ssize_t store_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_PRINT_MAPPED_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_PRINT_MAPPED_KEYS;
	}

	return count;
}

static ssize_t show_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_PHANTOM_KEYS) ? 1 : 0);
}

static ssize_t store_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_PRINT_PHANTOM_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_PRINT_PHANTOM_KEYS;
	}

	return count;
}

static ssize_t show_active_high_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_ACTIVE_HIGH) ? 1 : 0);
}

static ssize_t store_active_high_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_ACTIVE_HIGH;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_ACTIVE_HIGH;
	}

	return count;
}

static ssize_t show_drive_inactive_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DRIVE_INACTIVE) ? 1 : 0);
}

static ssize_t store_drive_inactive_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_DRIVE_INACTIVE;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_DRIVE_INACTIVE;
	}

	return count;
}

static DEVICE_ATTR(debounce_delay, (S_IRUGO | S_IWUGO), show_debounce_delay, store_debounce_delay);
static DEVICE_ATTR(settle_time, (S_IRUGO | S_IWUGO), show_settle_time, store_settle_time);
static DEVICE_ATTR(poll_time, (S_IRUGO | S_IWUGO), show_poll_time, store_poll_time);
static DEVICE_ATTR(flags, (S_IRUGO), show_flags, store_flags);
static DEVICE_ATTR(debounce_flag, (S_IRUGO | S_IWUGO), show_debounce_flag, store_debounce_flag);
static DEVICE_ATTR(remove_some_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_remove_some_phantom_keys_flag, store_remove_some_phantom_keys_flag);
static DEVICE_ATTR(print_unmapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_unmapped_keys_flag, store_print_unmapped_keys_flag);
static DEVICE_ATTR(print_mapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_mapped_keys_flag, store_print_mapped_keys_flag);
static DEVICE_ATTR(print_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_print_phantom_keys_flag, store_print_phantom_keys_flag);
static DEVICE_ATTR(active_high_flag, (S_IRUGO), show_active_high_flag, store_active_high_flag);
static DEVICE_ATTR(drive_inactive_flag, (S_IRUGO | S_IWUGO), show_drive_inactive_flag, store_drive_inactive_flag);

static void debounce_release(struct device *dev)
{
}

static struct device debounce_device = {
	.init_name = "debounce",
	.release = debounce_release,
};

static int __init debounce_init(void)
{
	struct device *event_dev = NULL;
	struct gpio_event_platform_data *gpio_epd;
	struct gpio_event_info *gpio_ei;
	int err = 0;

	printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n");
	
	event_dev = device_find_child(&platform_bus, GPIO_EVENT_DEV_NAME, find_ms2_dev);
	if (event_dev == NULL)
		return -ENODEV;

	gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data;
	printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name);
	if (strcmp(gpio_epd->name, "sholes-keypad"))
		return -ENODEV;

	gpio_ei = (struct gpio_event_info*)gpio_epd->info[0];
	gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info);

	err = device_register(&debounce_device);
	if (err) {
		return err;
	}

	err = device_create_file(&debounce_device, &dev_attr_debounce_delay);
	err = device_create_file(&debounce_device, &dev_attr_settle_time);
	err = device_create_file(&debounce_device, &dev_attr_poll_time);
	err = device_create_file(&debounce_device, &dev_attr_flags);
	err = device_create_file(&debounce_device, &dev_attr_debounce_flag);
	err = device_create_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	err = device_create_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	err = device_create_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	err = device_create_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
	err = device_create_file(&debounce_device, &dev_attr_active_high_flag);
	err = device_create_file(&debounce_device, &dev_attr_drive_inactive_flag);

	printk(KERN_INFO PREFIX "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec);
	printk(KERN_INFO PREFIX "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec);
	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);

	old_debounce_delay = gpio_evmi->debounce_delay;
	old_settle_time = gpio_evmi->settle_time;
	old_poll_time = gpio_evmi->poll_time;
	old_flags = gpio_evmi->flags;

	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);

	return 0;
}

static void __exit debounce_exit(void)
{
	if (gpio_evmi) {
		if (gpio_evmi->debounce_delay.tv.nsec != old_debounce_delay.tv.nsec) {
			printk(KERN_INFO PREFIX "Restoring debounce_delay\n");
			gpio_evmi->debounce_delay = old_debounce_delay;
			printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
		}
		if (gpio_evmi->flags != old_flags) {
			printk(KERN_INFO PREFIX "Restoring flags\n");
			gpio_evmi->flags = old_flags;
			printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
		}
		gpio_evmi->settle_time = old_settle_time;
		gpio_evmi->poll_time = old_poll_time;
	}
	device_remove_file(&debounce_device, &dev_attr_debounce_delay);
	device_remove_file(&debounce_device, &dev_attr_settle_time);
	device_remove_file(&debounce_device, &dev_attr_poll_time);
	device_remove_file(&debounce_device, &dev_attr_flags);
	device_remove_file(&debounce_device, &dev_attr_debounce_flag);
	device_remove_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	device_remove_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	device_remove_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	device_remove_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
	device_remove_file(&debounce_device, &dev_attr_active_high_flag);
	device_remove_file(&debounce_device, &dev_attr_drive_inactive_flag);
	device_unregister(&debounce_device);
}

module_init(debounce_init);
module_exit(debounce_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>");
Commit	Line	Data
b422e333	1	#include <linux/module.h>
d1ff9643 MG	2	#include <linux/device.h>
	3	#include <linux/platform_device.h>
	4	#include <linux/gpio_event.h>
	5
ab5ed215 MG	6	#define PREFIX "debounce: "
ab5ed215 MG	7
a4838b14	8	static unsigned old_flags = 0;
bb65757a MG	9	ktime_t old_debounce_delay;
	10	ktime_t old_settle_time;
	11	ktime_t old_poll_time;
1e65c113 MG	12	static struct gpio_event_matrix_info *gpio_evmi = NULL;
1e65c113 MG	13
ab5ed215	14	static int find_ms2_dev(struct device dev, void data)
d1ff9643 MG	15	{
d1ff9643 MG	16	if (!strncmp((char)data, dev_name(dev), strlen((char)data))) {
ab5ed215	17	printk(KERN_INFO PREFIX "Found it\n");
d1ff9643 MG	18	return 1;
	19	}
	20	return 0;
	21	}
b422e333	22
f7cb07b2 MG	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;
f7cb07b2 MG	36	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	37	}
	38
fc215caa	39	#if 0
f7cb07b2 MG	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
f7cb07b2 MG	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
fc215caa	64	return count;
f7cb07b2 MG	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
fc215caa	85	return count;
f7cb07b2 MG	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
fc215caa	106	return count;
f7cb07b2 MG	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);
fc215caa MG	125
	126	printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);
	127
f7cb07b2 MG	128	gpio_evmi->flags = flags;
f7cb07b2 MG	129
fc215caa MG	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);
f7cb07b2 MG	139	}
f7cb07b2 MG	140
fc215caa MG	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
a2485674 MG	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
fc215caa MG	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);
a2485674 MG	324	static DEVICE_ATTR(active_high_flag, (S_IRUGO), show_active_high_flag, store_active_high_flag);
a2485674 MG	325	static DEVICE_ATTR(drive_inactive_flag, (S_IRUGO \| S_IWUGO), show_drive_inactive_flag, store_drive_inactive_flag);
f7cb07b2 MG	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
b422e333 MG	336	static int __init debounce_init(void)
b422e333 MG	337	{
d1ff9643 MG	338	struct device *event_dev = NULL;
	339	struct gpio_event_platform_data *gpio_epd;
	340	struct gpio_event_info *gpio_ei;
f7cb07b2	341	int err = 0;
d1ff9643	342
ab5ed215	343	printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n");
d1ff9643 MG	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;
ab5ed215	350	printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name);
d1ff9643 MG	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
f7cb07b2 MG	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);
fc215caa MG	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);
a2485674 MG	371	err = device_create_file(&debounce_device, &dev_attr_active_high_flag);
a2485674 MG	372	err = device_create_file(&debounce_device, &dev_attr_drive_inactive_flag);
f7cb07b2	373
ab5ed215 MG	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);
20bf1c9e	378
bb65757a MG	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;
1e65c113	383
a4838b14 MG	384	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
a4838b14 MG	385
b422e333 MG	386	return 0;
	387	}
	388
	389	static void __exit debounce_exit(void)
	390	{
1e65c113	391	if (gpio_evmi) {
bb65757a	392	if (gpio_evmi->debounce_delay.tv.nsec != old_debounce_delay.tv.nsec) {
1e65c113	393	printk(KERN_INFO PREFIX "Restoring debounce_delay\n");
bb65757a	394	gpio_evmi->debounce_delay = old_debounce_delay;
1e65c113 MG	395	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
1e65c113 MG	396	}
a4838b14 MG	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	}
bb65757a MG	402	gpio_evmi->settle_time = old_settle_time;
bb65757a MG	403	gpio_evmi->poll_time = old_poll_time;
1e65c113	404	}
f7cb07b2 MG	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);
fc215caa MG	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);
a2485674 MG	414	device_remove_file(&debounce_device, &dev_attr_active_high_flag);
a2485674 MG	415	device_remove_file(&debounce_device, &dev_attr_drive_inactive_flag);
f7cb07b2	416	device_unregister(&debounce_device);
b422e333 MG	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>");