2  *  button.c - ACPI Button Driver
21  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
39 #define ACPI_BUTTON_CLASS		"button"
45 #define ACPI_BUTTON_SUBCLASS_POWER	"power"
47 #define ACPI_BUTTON_DEVICE_NAME_POWER	"Power Button"
52 #define ACPI_BUTTON_DEVICE_NAME_SLEEP	"Sleep Button"
61 ACPI_MODULE_NAME("button");
64 MODULE_DESCRIPTION("ACPI Button Driver");
83 	.name = "button",
105 /* --------------------------------------------------------------------------
107    -------------------------------------------------------------------------- */
114 	struct acpi_device *device = seq->private;  in acpi_button_state_seq_show()
118 	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);  in acpi_button_state_seq_show()
127 	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);  in acpi_button_state_open_fs()
140 	struct acpi_button *button = acpi_driver_data(device);  in acpi_button_add_fs()  local
145 	if (button->type != ACPI_BUTTON_TYPE_LID)  in acpi_button_add_fs()
150 		return -EEXIST;  in acpi_button_add_fs()
153 	/* create /proc/acpi/button */  in acpi_button_add_fs()
156 		return -ENODEV;  in acpi_button_add_fs()
158 	/* create /proc/acpi/button/lid */  in acpi_button_add_fs()
161 		ret = -ENODEV;  in acpi_button_add_fs()
165 	/* create /proc/acpi/button/lid/LID/ */  in acpi_button_add_fs()
168 		ret = -ENODEV;  in acpi_button_add_fs()
172 	/* create /proc/acpi/button/lid/LID/state */  in acpi_button_add_fs()
177 		ret = -ENODEV;  in acpi_button_add_fs()
197 	struct acpi_button *button = acpi_driver_data(device);  in acpi_button_remove_fs()  local
199 	if (button->type != ACPI_BUTTON_TYPE_LID)  in acpi_button_remove_fs()
213 /* --------------------------------------------------------------------------
215    -------------------------------------------------------------------------- */
234 		return -ENODEV;  in acpi_lid_open()
236 	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,  in acpi_lid_open()
239 		return -ENODEV;  in acpi_lid_open()
247 	struct acpi_button *button = acpi_driver_data(device);  in acpi_lid_send_state()  local
252 	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);  in acpi_lid_send_state()
254 		return -ENODEV;  in acpi_lid_send_state()
257 	input_report_switch(button->input, SW_LID, !state);  in acpi_lid_send_state()
258 	input_sync(button->input);  in acpi_lid_send_state()
261 		pm_wakeup_event(&device->dev, 0);  in acpi_lid_send_state()
279 	struct acpi_button *button = acpi_driver_data(device);  in acpi_button_notify()  local
287 		input = button->input;  in acpi_button_notify()
288 		if (button->type == ACPI_BUTTON_TYPE_LID) {  in acpi_button_notify()
291 			int keycode = test_bit(KEY_SLEEP, input->keybit) ?  in acpi_button_notify()
299 			pm_wakeup_event(&device->dev, 0);  in acpi_button_notify()
302 		acpi_bus_generate_proc_event(device, event, ++button->pushed);  in acpi_button_notify()
313 	struct acpi_button *button = acpi_driver_data(device);  in acpi_button_resume()  local
315 	if (button->type == ACPI_BUTTON_TYPE_LID)  in acpi_button_resume()
322 	struct acpi_button *button;  in acpi_button_add()  local
328 	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);  in acpi_button_add()
329 	if (!button)  in acpi_button_add()
330 		return -ENOMEM;  in acpi_button_add()
332 	device->driver_data = button;  in acpi_button_add()
334 	button->input = input = input_allocate_device();  in acpi_button_add()
336 		error = -ENOMEM;  in acpi_button_add()
345 		button->type = ACPI_BUTTON_TYPE_POWER;  in acpi_button_add()
351 		button->type = ACPI_BUTTON_TYPE_SLEEP;  in acpi_button_add()
356 		button->type = ACPI_BUTTON_TYPE_LID;  in acpi_button_add()
362 		error = -ENODEV;  in acpi_button_add()
370 	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);  in acpi_button_add()
372 	input->name = name;  in acpi_button_add()
373 	input->phys = button->phys;  in acpi_button_add()
374 	input->id.bustype = BUS_HOST;  in acpi_button_add()
375 	input->id.product = button->type;  in acpi_button_add()
376 	input->dev.parent = &device->dev;  in acpi_button_add()
378 	switch (button->type) {  in acpi_button_add()
380 		input->evbit[0] = BIT_MASK(EV_KEY);  in acpi_button_add()
381 		set_bit(KEY_POWER, input->keybit);  in acpi_button_add()
385 		input->evbit[0] = BIT_MASK(EV_KEY);  in acpi_button_add()
386 		set_bit(KEY_SLEEP, input->keybit);  in acpi_button_add()
390 		input->evbit[0] = BIT_MASK(EV_SW);  in acpi_button_add()
391 		set_bit(SW_LID, input->swbit);  in acpi_button_add()
398 	if (button->type == ACPI_BUTTON_TYPE_LID) {  in acpi_button_add()
407 	if (device->wakeup.flags.valid) {  in acpi_button_add()
408 		/* Button's GPE is run-wake GPE */  in acpi_button_add()
409 		acpi_enable_gpe(device->wakeup.gpe_device,  in acpi_button_add()
410 				device->wakeup.gpe_number);  in acpi_button_add()
411 		if (!device_may_wakeup(&device->dev)) {  in acpi_button_add()
412 			device_set_wakeup_enable(&device->dev, true);  in acpi_button_add()
413 			button->wakeup_enabled = true;  in acpi_button_add()
425 	kfree(button);  in acpi_button_add()
431 	struct acpi_button *button = acpi_driver_data(device);  in acpi_button_remove()  local
433 	if (device->wakeup.flags.valid) {  in acpi_button_remove()
434 		acpi_disable_gpe(device->wakeup.gpe_device,  in acpi_button_remove()
435 				device->wakeup.gpe_number);  in acpi_button_remove()
436 		if (button->wakeup_enabled)  in acpi_button_remove()
437 			device_set_wakeup_enable(&device->dev, false);  in acpi_button_remove()
441 	input_unregister_device(button->input);  in acpi_button_remove()
442 	kfree(button);  in acpi_button_remove()