80 	struct busmouse_data *mse = busmouse_data[mousedev];  in busmouse_add_movementbuttons()  local
83 	spin_lock(&mse->lock);  in busmouse_add_movementbuttons()
84 	changed = (dx != 0 || dy != 0 || mse->buttons != buttons);  in busmouse_add_movementbuttons()
89 		mse->buttons = buttons;  in busmouse_add_movementbuttons()
90 		mse->dxpos += dx;  in busmouse_add_movementbuttons()
91 		mse->dypos += dy;  in busmouse_add_movementbuttons()
92 		mse->ready = 1;  in busmouse_add_movementbuttons()
99 		if (mse->dxpos < -2048)  in busmouse_add_movementbuttons()
100 			mse->dxpos = -2048;  in busmouse_add_movementbuttons()
101 		if (mse->dxpos > 2048)  in busmouse_add_movementbuttons()
102 			mse->dxpos = 2048;  in busmouse_add_movementbuttons()
103 		if (mse->dypos < -2048)  in busmouse_add_movementbuttons()
104 			mse->dypos = -2048;  in busmouse_add_movementbuttons()
105 		if (mse->dypos > 2048)  in busmouse_add_movementbuttons()
106 			mse->dypos = 2048;  in busmouse_add_movementbuttons()
109 	spin_unlock(&mse->lock);  in busmouse_add_movementbuttons()
112 		wake_up(&mse->wait);  in busmouse_add_movementbuttons()
114 		kill_fasync(&mse->fasyncptr, SIGIO, POLL_IN);  in busmouse_add_movementbuttons()
131 	struct busmouse_data *mse = busmouse_data[mousedev];  in busmouse_add_movement()  local
133 	busmouse_add_movementbuttons(mousedev, dx, dy, mse->buttons);  in busmouse_add_movement()
150 	struct busmouse_data *mse = busmouse_data[mousedev];  in busmouse_add_buttons()  local
152 	busmouse_add_movementbuttons(mousedev, 0, 0, (mse->buttons & ~clear) ^ eor);  in busmouse_add_buttons()
157 	struct busmouse_data *mse = (struct busmouse_data *)filp->private_data;  in busmouse_fasync()  local
160 	retval = fasync_helper(fd, filp, on, &mse->fasyncptr);  in busmouse_fasync()
168 	struct busmouse_data *mse = (struct busmouse_data *)file->private_data;  in busmouse_release()  local
174 	if (--mse->active == 0) {  in busmouse_release()
175 		if (mse->ops->release)  in busmouse_release()
176 			ret = mse->ops->release(inode, file);  in busmouse_release()
177 	   	if (mse->ops->owner)  in busmouse_release()
178 			__MOD_DEC_USE_COUNT(mse->ops->owner);  in busmouse_release()
179 		mse->ready = 0;  in busmouse_release()
188 	struct busmouse_data *mse;  in busmouse_open()  local
197 	mse = busmouse_data[mousedev];  in busmouse_open()
199 	if (!mse || !mse->ops)	/* shouldn't happen, but... */  in busmouse_open()
202 	if (mse->ops->owner && !try_inc_mod_count(mse->ops->owner))  in busmouse_open()
206 	if (mse->ops->open) {  in busmouse_open()
207 		ret = mse->ops->open(inode, file);  in busmouse_open()
208 		if (ret && mse->ops->owner)  in busmouse_open()
209 			__MOD_DEC_USE_COUNT(mse->ops->owner);  in busmouse_open()
215 	file->private_data = mse;  in busmouse_open()
217 	if (mse->active++)  in busmouse_open()
220 	spin_lock_irq(&mse->lock);  in busmouse_open()
222 	mse->ready   = 0;  in busmouse_open()
223 	mse->dxpos   = 0;  in busmouse_open()
224 	mse->dypos   = 0;  in busmouse_open()
225 	mse->buttons = mse->ops->init_button_state;  in busmouse_open()
227 	spin_unlock_irq(&mse->lock);  in busmouse_open()
240 	struct busmouse_data *mse = (struct busmouse_data *)file->private_data;  in busmouse_read()  local
247 	spin_lock_irq(&mse->lock);  in busmouse_read()
249 	if (!mse->ready) {  in busmouse_read()
251 		spin_unlock_irq(&mse->lock);  in busmouse_read()
255 			spin_unlock_irq(&mse->lock);  in busmouse_read()
259 		add_wait_queue(&mse->wait, &wait);  in busmouse_read()
262 		if (!mse->ready && !signal_pending(current)) {  in busmouse_read()
263 			spin_unlock_irq(&mse->lock);  in busmouse_read()
265 			spin_lock_irq(&mse->lock);  in busmouse_read()
270 		remove_wait_queue(&mse->wait, &wait);  in busmouse_read()
273 			spin_unlock_irq(&mse->lock);  in busmouse_read()
279 	dxpos = mse->dxpos;  in busmouse_read()
280 	dypos = mse->dypos;  in busmouse_read()
281 	buttons = mse->buttons;  in busmouse_read()
292 	mse->dxpos -= dxpos;  in busmouse_read()
293 	mse->dypos -= dypos;  in busmouse_read()
300 	mse->ready = mse->dxpos || mse->dypos;  in busmouse_read()
302 	spin_unlock_irq(&mse->lock);  in busmouse_read()
325 	struct busmouse_data *mse = (struct busmouse_data *)file->private_data;  in busmouse_poll()  local
327 	poll_wait(file, &mse->wait, wait);  in busmouse_poll()
329 	if (mse->ready)  in busmouse_poll()
358 	struct busmouse_data *mse;  in register_busmouse()  local
367 	mse = kmalloc(sizeof(*mse), GFP_KERNEL);  in register_busmouse()
368 	if (!mse)  in register_busmouse()
375 		kfree(mse);  in register_busmouse()
379 	memset(mse, 0, sizeof(*mse));  in register_busmouse()
381 	mse->miscdev.minor = ops->minor;  in register_busmouse()
382 	mse->miscdev.name = ops->name;  in register_busmouse()
383 	mse->miscdev.fops = &busmouse_fops;  in register_busmouse()
384 	mse->ops = ops;  in register_busmouse()
385 	mse->lock = (spinlock_t)SPIN_LOCK_UNLOCKED;  in register_busmouse()
386 	init_waitqueue_head(&mse->wait);  in register_busmouse()
388 	busmouse_data[msedev] = mse;  in register_busmouse()
390 	ret = misc_register(&mse->miscdev);  in register_busmouse()