#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/gpio_event.h>
+#include <mach/gpio.h>
-#define PREFIX "debounce: "
+/* hardware debounce: (value + 1) * 31us */
+#define GPIO_DEBOUNCE_TIME 0x1
-static int debounce_delay = 15;
+#define PREFIX "debounce: "
static unsigned old_flags = 0;
ktime_t old_debounce_delay;
ktime_t old_poll_time;
static struct gpio_event_matrix_info *gpio_evmi = NULL;
-module_param(debounce_delay, int, S_IRUSR | S_IRGRP | S_IROTH);
-MODULE_PARM_DESC(debounce_delay, "debouncing delay (ms), default: 15");
-
static int find_ms2_dev(struct device *dev, void *data)
{
if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) {
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;
- debounce_delay = delay;
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;
}
}
+#endif
}
static ssize_t store_debounce_delay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
sscanf(buf, "%ld", &delay);
set_debounce_delay(delay);
- return strnlen(buf, PAGE_SIZE);
+ return count;
}
static ssize_t show_settle_time(struct device *dev, struct device_attribute *attr, char *buf)
sscanf(buf, "%ld", &delay);
gpio_evmi->settle_time.tv.nsec = delay * NSEC_PER_USEC;
- return strnlen(buf, PAGE_SIZE);
+ return count;
}
static ssize_t show_poll_time(struct device *dev, struct device_attribute *attr, char *buf)
sscanf(buf, "%ld", &delay);
gpio_evmi->poll_time.tv.nsec = delay * NSEC_PER_MSEC;
- return strnlen(buf, PAGE_SIZE);
+ return count;
}
static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf)
return -ENODEV;
sscanf(buf, "0x%x", &flags);
+
+ printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);
+
gpio_evmi->flags = flags;
- return strnlen(buf, PAGE_SIZE);
+ 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 | S_IWUGO), &show_flags, store_flags);
+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)
{
.release = debounce_release,
};
+static void hw_debounce_pin(int gpio, int enable) {
+ printk(KERN_INFO PREFIX "%sabling hardware debounce for GPIO %d\n", (enable?"En":"Dis"), gpio);
+ if (enable)
+ omap_set_gpio_debounce_time(gpio, GPIO_DEBOUNCE_TIME);
+ omap_set_gpio_debounce(gpio, enable);
+}
+
+static void hw_debounce(int enable) {
+ int i;
+
+ if (gpio_evmi == NULL)
+ return;
+
+ for (i = 0; i < gpio_evmi->ninputs; i++) {
+ hw_debounce_pin(gpio_evmi->input_gpios[i], enable);
+ }
+}
+
static int __init debounce_init(void)
{
struct device *event_dev = NULL;
return err;
}
+ hw_debounce(1);
+
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);
old_poll_time = gpio_evmi->poll_time;
old_flags = gpio_evmi->flags;
- set_debounce_delay(debounce_delay);
-#if 0
- gpio_evmi->flags &= ~GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
-#endif
printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
return 0;
gpio_evmi->settle_time = old_settle_time;
gpio_evmi->poll_time = old_poll_time;
}
+ hw_debounce(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_unregister(&debounce_device);
}
projects / ms2-fixes / blobdiff