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代码： 全选

……

	/* report the usage code as scancode if the key status has changed */
	if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
		input_event(input, EV_MSC, MSC_SCAN, usage->hid);

	input_event(input, usage->type, usage->code, value);

	if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
		input_event(input, usage->type, usage->code, 0);
}

代码： 全选

……

	/* report the usage code as scancode if the key status has changed */
	if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
		input_event(input, EV_MSC, MSC_SCAN, usage->hid);

	input_event(input, usage->type, usage->code, value);

	/* faster the wheel */
	if ((usage->type == EV_REL) && (usage->code == REL_WHEEL)) {
		input_event(input, usage->type, usage->code, value);
		input_event(input, usage->type, usage->code, value);
	}

	if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
		input_event(input, usage->type, usage->code, 0);
}

代码： 全选

xmodmap -e "keysym XF86AudioNext = F5"
xmodmap -e "keysym XF86AudioPlay = F4"
xmodmap -e "keysym XF86AudioPrev = F3"
xmodmap -e "keysym XF86Search = F2"
xmodmap -e "keysym XF86HomePage = F1"
#xmodmap -e "keysym XF86AudioMute = F6"
#xmodmap -e "keysym XF86AudioLowerVolume = F7"

代码： 全选

/**
 * input_event() - report new input event
 * @dev: device that generated the event
 * @type: type of the event
 * @code: event code
 * @value: value of the event
 *
 * This function should be used by drivers implementing various input
 * devices to report input events. See also input_inject_event().
 *
 * NOTE: input_event() may be safely used right after input device was
 * allocated with input_allocate_device(), even before it is registered
 * with input_register_device(), but the event will not reach any of the
 * input handlers. Such early invocation of input_event() may be used
 * to 'seed' initial state of a switch or initial position of absolute
 * axis, etc.
 */
void input_event(struct input_dev *dev,
		 unsigned int type, unsigned int code, int value)
{
	unsigned long flags;

	if (is_event_supported(type, dev->evbit, EV_MAX)) {

		spin_lock_irqsave(&dev->event_lock, flags);
		//printk("DUKE: dev=%p type=%d, code=%d, value=%d\n", dev, type, code, value);
		if (type == 1) {
			if (code == 172) code = 59; /* F1 */
			if (code == 217) code = 60; /* F2 */
			if (code == 165) code = 61; /* F3 */
			if (code == 164) code = 62; /* F4 */
			if (code == 163) code = 63; /* F5 */
			if (code == 113) code = 64; /* F6 */
			if (code == 114) code = 65; /* F7 */
			if (code == 115) code = 66; /* F8 */
		}
		input_handle_event(dev, type, code, value);
		spin_unlock_irqrestore(&dev->event_lock, flags);
	}
}
EXPORT_SYMBOL(input_event);

代码： 全选

struct input_dev *duke_dev = NULL;

void input_event(struct input_dev *dev,
		 unsigned int type, unsigned int code, int value)
{
	unsigned long flags;

	if (type == 1 && code == 1) {
		printk("%s: dev=%s type=%d, code=%d, value=%d\n", __FUNCTION__, dev->name, type, code, value);
		if (duke_dev == NULL && strcmp(dev->name, "AT Translated Set 2 keyboard") == 0) {
			printk("AT pressed.\n");
			duke_dev = dev;
		}
	}

	if (is_event_supported(type, dev->evbit, EV_MAX)) {

		spin_lock_irqsave(&dev->event_lock, flags);
		input_handle_event(dev, type, code, value);
		spin_unlock_irqrestore(&dev->event_lock, flags);
	}
}
EXPORT_SYMBOL(input_event);

代码： 全选

#include <linux/input/mt.h>
extern struct input_dev *duke_dev;

acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
{
	……

	/*
	 * Execute the method. Performs parse simultaneously
	 */
	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
			  "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
			  info->node->name.ascii, info->node, info->obj_desc));

	{
		char code_name[5];
		memcpy(code_name, info->node->name.ascii, 4);
		code_name[4] = '\0';
		printk("%s, parse: %s\n", __FUNCTION__, code_name); // _Q4B
		if (duke_dev != NULL && strcmp(code_name, "_Q4B") == 0) {
			printk("report Esc\n");
			input_event(duke_dev, 1, 1, 1);
			input_event(duke_dev, 1, 1, 0);
			input_sync(duke_dev);
		}
	}

	/* Create and init a Root Node */
	……
}

代码： 全选

^[[   46.827917] acpi_ps_execute_method, parse: _Q4B
[   46.827921] report Esc
[   46.827924] input_event: dev=AT Translated Set 2 keyboard type=1, code=1, value=1
[   46.827926] input_event: dev=AT Translated Set 2 keyboard type=1, code=1, value=0
^[[   47.210268] acpi_ps_execute_method, parse: _Q4B
[   47.210271] report Esc
[   47.210274] input_event: dev=AT Translated Set 2 keyboard type=1, code=1, value=1
[   47.210277] input_event: dev=AT Translated Set 2 keyboard type=1, code=1, value=0
^[[   47.460568] acpi_ps_execute_method, parse: _Q4B
[   47.460571] report Esc
[   47.460575] input_event: dev=AT Translated Set 2 keyboard type=1, code=1, value=1
[   47.460577] input_event: dev=AT Translated Set 2 keyboard type=1, code=1, value=0