[ms2-fixes] / debounce.c

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

#define PREFIX "debounce: "

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

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;
}

/* hardware debounce: (time + 1) * 31us */
static void hw_debounce_set(int enable, int time) {
	int i;

	if (gpio_evmi == NULL)
		return;

	for (i = 0; i < gpio_evmi->ninputs; i++) {
		int gpio = gpio_evmi->input_gpios[i];

		if ((time != -1) && (time != hw_debounce_time) && hw_debounce) {
			printk(KERN_INFO PREFIX "Setting hardware debounce time for GPIO %d to %d (%dus)\n", gpio, time, (time+1)*31);
			omap_set_gpio_debounce_time(gpio, time);
		}

		if ((enable != -1) && (enable != hw_debounce)) {
			printk(KERN_INFO PREFIX "%sabling hardware debounce for GPIO %d\n", (enable?"En":"Dis"), gpio);
			omap_set_gpio_debounce(gpio, enable);
		}
	}
}


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 ssize_t show_hw_debounce(struct device *dev, struct device_attribute *attr, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", hw_debounce);
}

static ssize_t store_hw_debounce(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	int enable;

	sscanf(buf, "%d", &enable);

	if (enable) {
		hw_debounce_set(1, -1);
		hw_debounce = 1;
	}
	else {
		hw_debounce_set(-1, 0);
		hw_debounce_set(0, -1);
		hw_debounce = 0;
		hw_debounce_time = 0;
	}

	return count;
}

static ssize_t show_hw_debounce_time(struct device *dev, struct device_attribute *attr, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", hw_debounce_time);
}

static ssize_t store_hw_debounce_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	int time;

	sscanf(buf, "%d", &time);

	if ((time < 0) || (time > 0xff))
		return count;

	if (!hw_debounce)
		return count;

	hw_debounce_set(-1, time);
	hw_debounce_time = time;

	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 DEVICE_ATTR(hw_debounce, (S_IRUGO | S_IWUGO), show_hw_debounce, store_hw_debounce);
static DEVICE_ATTR(hw_debounce_time, (S_IRUGO | S_IWUGO), show_hw_debounce_time, store_hw_debounce_time);

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);
	err = device_create_file(&debounce_device, &dev_attr_hw_debounce);
	err = device_create_file(&debounce_device, &dev_attr_hw_debounce_time);

	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;
	}
	hw_debounce_set(0, 0);
	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_remove_file(&debounce_device, &dev_attr_hw_debounce);
	device_remove_file(&debounce_device, &dev_attr_hw_debounce_time);
	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>
62a453fc MG	5	#include <mach/gpio.h>
62a453fc MG	6
ab5ed215 MG	7	#define PREFIX "debounce: "
ab5ed215 MG	8
a4838b14	9	static unsigned old_flags = 0;
29bad272 MG	10	static ktime_t old_debounce_delay;
	11	static ktime_t old_settle_time;
	12	static ktime_t old_poll_time;
1e65c113	13	static struct gpio_event_matrix_info *gpio_evmi = NULL;
29bad272 MG	14	static int hw_debounce = 0;
29bad272 MG	15	static int hw_debounce_time = 0;
1e65c113	16
ab5ed215	17	static int find_ms2_dev(struct device dev, void data)
d1ff9643 MG	18	{
d1ff9643 MG	19	if (!strncmp((char)data, dev_name(dev), strlen((char)data))) {
ab5ed215	20	printk(KERN_INFO PREFIX "Found it\n");
d1ff9643 MG	21	return 1;
	22	}
	23	return 0;
	24	}
b422e333	25
29bad272 MG	26	/* hardware debounce: (time + 1) * 31us */
	27	static void hw_debounce_set(int enable, int time) {
	28	int i;
	29
	30	if (gpio_evmi == NULL)
	31	return;
	32
	33	for (i = 0; i < gpio_evmi->ninputs; i++) {
	34	int gpio = gpio_evmi->input_gpios[i];
	35
308fc1a5	36	if ((time != -1) && (time != hw_debounce_time) && hw_debounce) {
5df3a8e0	37	printk(KERN_INFO PREFIX "Setting hardware debounce time for GPIO %d to %d (%dus)\n", gpio, time, (time+1)*31);
29bad272 MG	38	omap_set_gpio_debounce_time(gpio, time);
29bad272 MG	39	}
308fc1a5 MG	40
	41	if ((enable != -1) && (enable != hw_debounce)) {
	42	printk(KERN_INFO PREFIX "%sabling hardware debounce for GPIO %d\n", (enable?"En":"Dis"), gpio);
	43	omap_set_gpio_debounce(gpio, enable);
	44	}
29bad272 MG	45	}
	46	}
	47
	48
f7cb07b2 MG	49	static ssize_t show_debounce_delay(struct device dev, struct device_attribute attr, char *buf)
	50	{
	51	if (!gpio_evmi)
	52	return -ENODEV;
	53
	54	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->debounce_delay.tv.nsec / NSEC_PER_MSEC));
	55	}
	56
	57	static void set_debounce_delay(long delay)
	58	{
	59	if (gpio_evmi->debounce_delay.tv.nsec != delay * NSEC_PER_MSEC) {
	60	printk(KERN_INFO PREFIX "Changing debounce_delay\n");
	61	gpio_evmi->debounce_delay.tv.nsec = delay * NSEC_PER_MSEC;
f7cb07b2 MG	62	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	63	}
	64
fc215caa	65	#if 0
f7cb07b2 MG	66	if (gpio_evmi->debounce_delay.tv.nsec != 0) {
	67	if (!(gpio_evmi->flags & GPIOKPF_DEBOUNCE)) {
	68	printk(KERN_INFO PREFIX "Activating debounce\n");
	69	gpio_evmi->flags \|= GPIOKPF_DEBOUNCE;
	70	}
	71	} else {
	72	if (gpio_evmi->flags & GPIOKPF_DEBOUNCE) {
	73	printk(KERN_INFO PREFIX "Deactivating debounce\n");
	74	gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
	75	}
	76	}
fc215caa	77	#endif
f7cb07b2 MG	78	}
	79
	80	static ssize_t store_debounce_delay(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	81	{
	82	long int delay;
	83
	84	if (!gpio_evmi)
	85	return -ENODEV;
	86
	87	sscanf(buf, "%ld", &delay);
	88	set_debounce_delay(delay);
	89
fc215caa	90	return count;
f7cb07b2 MG	91	}
	92
	93	static ssize_t show_settle_time(struct device dev, struct device_attribute attr, char *buf)
	94	{
	95	if (!gpio_evmi)
	96	return -ENODEV;
	97
	98	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->settle_time.tv.nsec / NSEC_PER_USEC));
	99	}
	100
	101	static ssize_t store_settle_time(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	102	{
	103	long int delay;
	104
	105	if (!gpio_evmi)
	106	return -ENODEV;
	107
	108	sscanf(buf, "%ld", &delay);
	109	gpio_evmi->settle_time.tv.nsec = delay * NSEC_PER_USEC;
	110
fc215caa	111	return count;
f7cb07b2 MG	112	}
	113
	114	static ssize_t show_poll_time(struct device dev, struct device_attribute attr, char *buf)
	115	{
	116	if (!gpio_evmi)
	117	return -ENODEV;
	118
	119	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->poll_time.tv.nsec / NSEC_PER_MSEC));
	120	}
	121
	122	static ssize_t store_poll_time(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	123	{
	124	long int delay;
	125
	126	if (!gpio_evmi)
	127	return -ENODEV;
	128
	129	sscanf(buf, "%ld", &delay);
	130	gpio_evmi->poll_time.tv.nsec = delay * NSEC_PER_MSEC;
	131
fc215caa	132	return count;
f7cb07b2 MG	133	}
	134
	135	static ssize_t show_flags(struct device dev, struct device_attribute attr, char *buf)
	136	{
	137	if (!gpio_evmi)
	138	return -ENODEV;
	139
	140	return snprintf(buf, PAGE_SIZE, "0x%x\n", gpio_evmi->flags);
	141	}
	142
	143	static ssize_t store_flags(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	144	{
	145	unsigned flags;
	146
	147	if (!gpio_evmi)
	148	return -ENODEV;
	149
	150	sscanf(buf, "0x%x", &flags);
fc215caa MG	151
	152	printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);
	153
f7cb07b2 MG	154	gpio_evmi->flags = flags;
f7cb07b2 MG	155
fc215caa MG	156	return count;
	157	}
	158
	159	static ssize_t show_debounce_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_DEBOUNCE) ? 1 : 0);
f7cb07b2 MG	165	}
f7cb07b2 MG	166
fc215caa MG	167	static ssize_t store_debounce_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_DEBOUNCE;
	178	} else {
	179	gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
	180	}
	181
	182	return count;
	183	}
	184
	185	static ssize_t show_remove_some_phantom_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_REMOVE_SOME_PHANTOM_KEYS) ? 1 : 0);
	191	}
	192
	193	static ssize_t store_remove_some_phantom_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_REMOVE_SOME_PHANTOM_KEYS;
	204	} else {
	205	gpio_evmi->flags &= ~GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
	206	}
	207
	208	return count;
	209	}
	210
	211	static ssize_t show_print_unmapped_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_UNMAPPED_KEYS) ? 1 : 0);
	217	}
	218
	219	static ssize_t store_print_unmapped_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_UNMAPPED_KEYS;
	230	} else {
231	gpio_evmi->flags &= ~GPIOKPF_PRINT_UNMAPPED_KEYS;
232	}
233
234	return count;
235	}
236
237	static ssize_t show_print_mapped_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_MAPPED_KEYS) ? 1 : 0);
243	}
244
245	static ssize_t store_print_mapped_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_MAPPED_KEYS;
256	} else {
257	gpio_evmi->flags &= ~GPIOKPF_PRINT_MAPPED_KEYS;
258	}
259
260	return count;
261	}
262
263	static ssize_t show_print_phantom_keys_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_PRINT_PHANTOM_KEYS) ? 1 : 0);
269	}
270
271	static ssize_t store_print_phantom_keys_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_PRINT_PHANTOM_KEYS;
282	} else {
283	gpio_evmi->flags &= ~GPIOKPF_PRINT_PHANTOM_KEYS;
284	}
285
286	return count;
287	}
288
a2485674 MG	289	static ssize_t show_active_high_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_ACTIVE_HIGH) ? 1 : 0);
	295	}
	296
	297	static ssize_t store_active_high_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_ACTIVE_HIGH;
	308	} else {
	309	gpio_evmi->flags &= ~GPIOKPF_ACTIVE_HIGH;
	310	}
	311
	312	return count;
	313	}
	314
	315	static ssize_t show_drive_inactive_flag(struct device dev, struct device_attribute attr, char *buf)
	316	{
	317	if (!gpio_evmi)
	318	return -ENODEV;
	319
	320	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DRIVE_INACTIVE) ? 1 : 0);
	321	}
	322
	323	static ssize_t store_drive_inactive_flag(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	324	{
	325	unsigned flag;
	326
	327	if (!gpio_evmi)
	328	return -ENODEV;
	329
	330	sscanf(buf, "%u", &flag);
	331
	332	if (flag) {
	333	gpio_evmi->flags \|= GPIOKPF_DRIVE_INACTIVE;
	334	} else {
	335	gpio_evmi->flags &= ~GPIOKPF_DRIVE_INACTIVE;
	336	}
	337
	338	return count;
	339	}
	340
29bad272 MG	341	static ssize_t show_hw_debounce(struct device dev, struct device_attribute attr, char *buf)
	342	{
	343	return snprintf(buf, PAGE_SIZE, "%d\n", hw_debounce);
	344	}
	345
	346	static ssize_t store_hw_debounce(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	347	{
	348	int enable;
	349
	350	sscanf(buf, "%d", &enable);
	351
	352	if (enable) {
	353	hw_debounce_set(1, -1);
	354	hw_debounce = 1;
	355	}
	356	else {
c0cd650e	357	hw_debounce_set(-1, 0);
29bad272 MG	358	hw_debounce_set(0, -1);
29bad272 MG	359	hw_debounce = 0;
c0cd650e	360	hw_debounce_time = 0;
29bad272 MG	361	}
	362
	363	return count;
	364	}
	365
	366	static ssize_t show_hw_debounce_time(struct device dev, struct device_attribute attr, char *buf)
	367	{
	368	return snprintf(buf, PAGE_SIZE, "%d\n", hw_debounce_time);
	369	}
	370
	371	static ssize_t store_hw_debounce_time(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	372	{
	373	int time;
	374
	375	sscanf(buf, "%d", &time);
	376
	377	if ((time < 0) \|\| (time > 0xff))
	378	return count;
	379
8440ec7c MG	380	if (!hw_debounce)
	381	return count;
	382
29bad272 MG	383	hw_debounce_set(-1, time);
	384	hw_debounce_time = time;
	385
	386	return count;
	387	}
	388
fc215caa MG	389	static DEVICE_ATTR(debounce_delay, (S_IRUGO \| S_IWUGO), show_debounce_delay, store_debounce_delay);
	390	static DEVICE_ATTR(settle_time, (S_IRUGO \| S_IWUGO), show_settle_time, store_settle_time);
	391	static DEVICE_ATTR(poll_time, (S_IRUGO \| S_IWUGO), show_poll_time, store_poll_time);
	392	static DEVICE_ATTR(flags, (S_IRUGO), show_flags, store_flags);
	393	static DEVICE_ATTR(debounce_flag, (S_IRUGO \| S_IWUGO), show_debounce_flag, store_debounce_flag);
	394	static DEVICE_ATTR(remove_some_phantom_keys_flag, (S_IRUGO \| S_IWUGO), show_remove_some_phantom_keys_flag, store_remove_some_phantom_keys_flag);
	395	static DEVICE_ATTR(print_unmapped_keys_flag, (S_IRUGO \| S_IWUGO), show_print_unmapped_keys_flag, store_print_unmapped_keys_flag);
	396	static DEVICE_ATTR(print_mapped_keys_flag, (S_IRUGO \| S_IWUGO), show_print_mapped_keys_flag, store_print_mapped_keys_flag);
	397	static DEVICE_ATTR(print_phantom_keys_flag, (S_IRUGO \| S_IWUGO), show_print_phantom_keys_flag, store_print_phantom_keys_flag);
a2485674 MG	398	static DEVICE_ATTR(active_high_flag, (S_IRUGO), show_active_high_flag, store_active_high_flag);
a2485674 MG	399	static DEVICE_ATTR(drive_inactive_flag, (S_IRUGO \| S_IWUGO), show_drive_inactive_flag, store_drive_inactive_flag);
29bad272 MG	400	static DEVICE_ATTR(hw_debounce, (S_IRUGO \| S_IWUGO), show_hw_debounce, store_hw_debounce);
29bad272 MG	401	static DEVICE_ATTR(hw_debounce_time, (S_IRUGO \| S_IWUGO), show_hw_debounce_time, store_hw_debounce_time);
f7cb07b2 MG	402
	403	static void debounce_release(struct device *dev)
	404	{
	405	}
	406
	407	static struct device debounce_device = {
	408	.init_name = "debounce",
	409	.release = debounce_release,
	410	};
	411
b422e333 MG	412	static int __init debounce_init(void)
b422e333 MG	413	{
d1ff9643 MG	414	struct device *event_dev = NULL;
	415	struct gpio_event_platform_data *gpio_epd;
	416	struct gpio_event_info *gpio_ei;
f7cb07b2	417	int err = 0;
d1ff9643	418
ab5ed215	419	printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n");
d1ff9643 MG	420
	421	event_dev = device_find_child(&platform_bus, GPIO_EVENT_DEV_NAME, find_ms2_dev);
	422	if (event_dev == NULL)
	423	return -ENODEV;
	424
	425	gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data;
ab5ed215	426	printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name);
d1ff9643 MG	427	if (strcmp(gpio_epd->name, "sholes-keypad"))
	428	return -ENODEV;
	429
	430	gpio_ei = (struct gpio_event_info*)gpio_epd->info[0];
	431	gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info);
	432
f7cb07b2 MG	433	err = device_register(&debounce_device);
	434	if (err) {
	435	return err;
	436	}
	437
	438	err = device_create_file(&debounce_device, &dev_attr_debounce_delay);
	439	err = device_create_file(&debounce_device, &dev_attr_settle_time);
	440	err = device_create_file(&debounce_device, &dev_attr_poll_time);
	441	err = device_create_file(&debounce_device, &dev_attr_flags);
fc215caa MG	442	err = device_create_file(&debounce_device, &dev_attr_debounce_flag);
	443	err = device_create_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	444	err = device_create_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	445	err = device_create_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	446	err = device_create_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
a2485674 MG	447	err = device_create_file(&debounce_device, &dev_attr_active_high_flag);
a2485674 MG	448	err = device_create_file(&debounce_device, &dev_attr_drive_inactive_flag);
29bad272 MG	449	err = device_create_file(&debounce_device, &dev_attr_hw_debounce);
29bad272 MG	450	err = device_create_file(&debounce_device, &dev_attr_hw_debounce_time);
f7cb07b2	451
ab5ed215 MG	452	printk(KERN_INFO PREFIX "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec);
	453	printk(KERN_INFO PREFIX "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec);
	454	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	455	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
20bf1c9e	456
bb65757a MG	457	old_debounce_delay = gpio_evmi->debounce_delay;
	458	old_settle_time = gpio_evmi->settle_time;
	459	old_poll_time = gpio_evmi->poll_time;
	460	old_flags = gpio_evmi->flags;
1e65c113	461
a4838b14 MG	462	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
a4838b14 MG	463
b422e333 MG	464	return 0;
	465	}
	466
	467	static void __exit debounce_exit(void)
	468	{
1e65c113	469	if (gpio_evmi) {
bb65757a	470	if (gpio_evmi->debounce_delay.tv.nsec != old_debounce_delay.tv.nsec) {
1e65c113	471	printk(KERN_INFO PREFIX "Restoring debounce_delay\n");
bb65757a	472	gpio_evmi->debounce_delay = old_debounce_delay;
1e65c113 MG	473	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
1e65c113 MG	474	}
a4838b14 MG	475	if (gpio_evmi->flags != old_flags) {
	476	printk(KERN_INFO PREFIX "Restoring flags\n");
	477	gpio_evmi->flags = old_flags;
	478	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
	479	}
bb65757a MG	480	gpio_evmi->settle_time = old_settle_time;
bb65757a MG	481	gpio_evmi->poll_time = old_poll_time;
1e65c113	482	}
29bad272	483	hw_debounce_set(0, 0);
f7cb07b2 MG	484	device_remove_file(&debounce_device, &dev_attr_debounce_delay);
	485	device_remove_file(&debounce_device, &dev_attr_settle_time);
	486	device_remove_file(&debounce_device, &dev_attr_poll_time);
	487	device_remove_file(&debounce_device, &dev_attr_flags);
fc215caa MG	488	device_remove_file(&debounce_device, &dev_attr_debounce_flag);
	489	device_remove_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	490	device_remove_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	491	device_remove_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	492	device_remove_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
a2485674 MG	493	device_remove_file(&debounce_device, &dev_attr_active_high_flag);
a2485674 MG	494	device_remove_file(&debounce_device, &dev_attr_drive_inactive_flag);
29bad272 MG	495	device_remove_file(&debounce_device, &dev_attr_hw_debounce);
29bad272 MG	496	device_remove_file(&debounce_device, &dev_attr_hw_debounce_time);
f7cb07b2	497	device_unregister(&debounce_device);
b422e333 MG	498	}
	499
	500	module_init(debounce_init);
	501	module_exit(debounce_exit);
	502
	503	MODULE_LICENSE("GPL");
	504	MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>");