#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/gpio_event.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <mach/gpio.h>
+#include <linux/earlysuspend.h>
+#include <linux/wakelock.h>
#define PREFIX "debounce: "
static ktime_t old_debounce_delay;
static ktime_t old_settle_time;
static ktime_t old_poll_time;
+static int (*old_sw_fixup)(int index);
static struct gpio_event_matrix_info *gpio_evmi = NULL;
static int hw_debounce = 0;
static int hw_debounce_time = 0;
+struct gpio_event {
+ struct gpio_event_input_devs *input_devs;
+ const struct gpio_event_platform_data *info;
+ struct early_suspend early_suspend;
+ void *state[0];
+};
+
+struct gpio_kp {
+ struct gpio_event_input_devs *input_devs;
+ struct gpio_event_matrix_info *keypad_info;
+ struct hrtimer timer;
+ struct wake_lock wake_lock;
+ int current_output;
+ unsigned int use_irq:1;
+ unsigned int key_state_changed:1;
+ unsigned int last_key_state_changed:1;
+ unsigned int some_keys_pressed:2;
+ unsigned long keys_pressed[0];
+};
+
+static struct gpio_kp *gpio_kp_state = NULL;
+
static int find_ms2_dev(struct device *dev, void *data)
{
if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) {
for (i = 0; i < gpio_evmi->ninputs; i++) {
int gpio = gpio_evmi->input_gpios[i];
- if (enable != -1) {
- printk(KERN_INFO PREFIX "%sabling hardware debounce for GPIO %d\n", (enable?"En":"Dis"), gpio);
- omap_set_gpio_debounce(gpio, enable);
+ 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 (time != -1) {
- printk(KERN_INFO PREFIX "Setting hardware debounce itime 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 void set_irq_types(void) {
+ int err;
+ unsigned int irq;
+ unsigned long type;
+ int i;
+
+ if (gpio_evmi == NULL)
+ return;
+
+ switch (gpio_evmi->flags & (GPIOKPF_ACTIVE_HIGH|GPIOKPF_LEVEL_TRIGGERED_IRQ)) {
+ default:
+ type = IRQ_TYPE_EDGE_FALLING;
+ break;
+ case GPIOKPF_ACTIVE_HIGH:
+ type = IRQ_TYPE_EDGE_RISING;
+ break;
+ case GPIOKPF_LEVEL_TRIGGERED_IRQ:
+ type = IRQ_TYPE_LEVEL_LOW;
+ break;
+ case GPIOKPF_LEVEL_TRIGGERED_IRQ | GPIOKPF_ACTIVE_HIGH:
+ type = IRQ_TYPE_LEVEL_HIGH;
+ break;
+ }
+
+ printk(KERN_INFO PREFIX "Settinhg IRQ type to 0x%lx\n", type);
+
+ for (i = 0; i < gpio_evmi->ninputs; i++) {
+
+ err = irq = gpio_to_irq(gpio_evmi->input_gpios[i]);
+
+ if (err < 0)
+ return;
+
+ err = set_irq_type(irq, type);
+ }
+}
static ssize_t show_debounce_delay(struct device *dev, struct device_attribute *attr, char *buf)
{
gpio_evmi->flags &= ~GPIOKPF_ACTIVE_HIGH;
}
+ set_irq_types();
+
+ return count;
+}
+
+static ssize_t show_level_triggered_irq_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_LEVEL_TRIGGERED_IRQ) ? 1 : 0);
+}
+
+static ssize_t store_level_triggered_irq_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_LEVEL_TRIGGERED_IRQ;
+ } else {
+ gpio_evmi->flags &= ~GPIOKPF_LEVEL_TRIGGERED_IRQ;
+ }
+
+ set_irq_types();
+
return count;
}
hw_debounce = 1;
}
else {
+ hw_debounce_set(-1, 0);
hw_debounce_set(0, -1);
hw_debounce = 0;
+ hw_debounce_time = 0;
}
return count;
if ((time < 0) || (time > 0xff))
return count;
+ if (!hw_debounce)
+ return count;
+
hw_debounce_set(-1, time);
hw_debounce_time = time;
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(active_high_flag, (S_IRUGO | S_IWUGO), show_active_high_flag, store_active_high_flag);
+static DEVICE_ATTR(level_triggered_irq_flag, (S_IRUGO | S_IWUGO), show_level_triggered_irq_flag, store_level_triggered_irq_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);
+#if 0
+static int debounce_fixup(int index)
+{
+ int ret;
+
+ printk(KERN_INFO PREFIX "key_state_changed: %d, last_key_state_changed: %d, some_keys_pressed: %d\n",
+ gpio_kp_state->key_state_changed,
+ gpio_kp_state->last_key_state_changed,
+ gpio_kp_state->some_keys_pressed);
+
+ ret = old_sw_fixup(index);
+ if (!ret)
+ printk(KERN_INFO PREFIX "Index 0x%x ignored!\n", index);
+
+ return ret;
+}
+#endif
+
static void debounce_release(struct device *dev)
{
}
static int __init debounce_init(void)
{
struct device *event_dev = NULL;
+ struct platform_device *pdev = NULL;
struct gpio_event_platform_data *gpio_epd;
struct gpio_event_info *gpio_ei;
+ struct gpio_event *gpio_e;
int err = 0;
+ int i;
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;
-
+
+ pdev = container_of(event_dev, struct platform_device, dev);
+ if (pdev == 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"))
gpio_ei = (struct gpio_event_info*)gpio_epd->info[0];
gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info);
+ gpio_e = platform_get_drvdata(pdev);
+ printk(KERN_INFO PREFIX "Number of states: %d\n", gpio_e->info->info_count);
+
+ /* Search for correct gpio_event state */
+ for (i = 0; i < gpio_e->info->info_count; i++) {
+ if (gpio_e->info->info[i]->func == gpio_ei->func) {
+ printk(KERN_INFO PREFIX "Keypad state: %d\n", i);
+ gpio_kp_state = gpio_e->state[i];
+ }
+ }
+
+ if (!gpio_kp_state) {
+ printk(KERN_ERR PREFIX "Can't determine correct keypad state!\n");
+ return -ENODEV;
+ }
+
+ printk(KERN_INFO PREFIX "kp_use_irq: %d\n", gpio_kp_state->use_irq);
+#if 0
+ gpio_kp_state->use_irq=0;
+ hrtimer_start(&(gpio_kp_state->timer), gpio_evmi->poll_time, HRTIMER_MODE_REL);
+ printk(KERN_INFO PREFIX "kp_use_irq: %d\n", gpio_kp_state->use_irq);
+#endif
+
err = device_register(&debounce_device);
if (err) {
return err;
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_level_triggered_irq_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);
old_settle_time = gpio_evmi->settle_time;
old_poll_time = gpio_evmi->poll_time;
old_flags = gpio_evmi->flags;
+ old_sw_fixup = gpio_evmi->sw_fixup;
- printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
+#if 0
+ printk(KERN_INFO PREFIX "Registering fixup handler\n");
+ gpio_evmi->sw_fixup = debounce_fixup;
+#endif
return 0;
}
printk(KERN_INFO PREFIX "Restoring flags\n");
gpio_evmi->flags = old_flags;
printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
+ set_irq_types();
}
gpio_evmi->settle_time = old_settle_time;
gpio_evmi->poll_time = old_poll_time;
+
+ if (gpio_evmi->sw_fixup != old_sw_fixup) {
+ printk(KERN_INFO PREFIX "Restoring fixup handler\n");
+ gpio_evmi->sw_fixup = old_sw_fixup;
+ }
}
hw_debounce_set(0, 0);
device_remove_file(&debounce_device, &dev_attr_debounce_delay);
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_level_triggered_irq_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);
projects / ms2-fixes / blobdiff