2  * PPS core file
54 	struct pps_device *pps = file->private_data;  in pps_cdev_poll()  local
56 	poll_wait(file, &pps->queue, wait);  in pps_cdev_poll()
63 	struct pps_device *pps = file->private_data;  in pps_cdev_fasync()  local
64 	return fasync_helper(fd, file, on, &pps->async_queue);  in pps_cdev_fasync()
67 static int pps_cdev_pps_fetch(struct pps_device *pps, struct pps_fdata *fdata)  in pps_cdev_pps_fetch()  argument
69 	unsigned int ev = pps->last_ev;  in pps_cdev_pps_fetch()
74 		err = wait_event_interruptible(pps->queue,  in pps_cdev_pps_fetch()
75 				ev != pps->last_ev);  in pps_cdev_pps_fetch()
79 		dev_dbg(pps->dev, "timeout %lld.%09d\n",  in pps_cdev_pps_fetch()
87 					pps->queue,  in pps_cdev_pps_fetch()
88 					ev != pps->last_ev,  in pps_cdev_pps_fetch()
97 		dev_dbg(pps->dev, "pending signal caught\n");  in pps_cdev_pps_fetch()
107 	struct pps_device *pps = file->private_data;  in pps_cdev_ioctl()  local
115 		dev_dbg(pps->dev, "PPS_GETPARAMS\n");  in pps_cdev_ioctl()
117 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
120 		params = pps->params;  in pps_cdev_ioctl()
122 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
131 		dev_dbg(pps->dev, "PPS_SETPARAMS\n");  in pps_cdev_ioctl()
141 			dev_dbg(pps->dev, "capture mode unspecified (%x)\n",  in pps_cdev_ioctl()
147 		if ((params.mode & ~pps->info.mode) != 0) {  in pps_cdev_ioctl()
148 			dev_dbg(pps->dev, "unsupported capabilities (%x)\n",  in pps_cdev_ioctl()
153 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
156 		pps->params = params;  in pps_cdev_ioctl()
161 			dev_dbg(pps->dev, "time format unspecified (%x)\n",  in pps_cdev_ioctl()
163 			pps->params.mode |= PPS_TSFMT_TSPEC;  in pps_cdev_ioctl()
165 		if (pps->info.mode & PPS_CANWAIT)  in pps_cdev_ioctl()
166 			pps->params.mode |= PPS_CANWAIT;  in pps_cdev_ioctl()
167 		pps->params.api_version = PPS_API_VERS;  in pps_cdev_ioctl()
174 		pps->params.assert_off_tu.flags = 0;  in pps_cdev_ioctl()
175 		pps->params.clear_off_tu.flags = 0;  in pps_cdev_ioctl()
177 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
182 		dev_dbg(pps->dev, "PPS_GETCAP\n");  in pps_cdev_ioctl()
184 		err = put_user(pps->info.mode, iuarg);  in pps_cdev_ioctl()
193 		dev_dbg(pps->dev, "PPS_FETCH\n");  in pps_cdev_ioctl()
199 		err = pps_cdev_pps_fetch(pps, &fdata);  in pps_cdev_ioctl()
204 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
206 		fdata.info.assert_sequence = pps->assert_sequence;  in pps_cdev_ioctl()
207 		fdata.info.clear_sequence = pps->clear_sequence;  in pps_cdev_ioctl()
208 		fdata.info.assert_tu = pps->assert_tu;  in pps_cdev_ioctl()
209 		fdata.info.clear_tu = pps->clear_tu;  in pps_cdev_ioctl()
210 		fdata.info.current_mode = pps->current_mode;  in pps_cdev_ioctl()
212 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
223 		dev_dbg(pps->dev, "PPS_KC_BIND\n");  in pps_cdev_ioctl()
234 		if ((bind_args.edge & ~pps->info.mode) != 0) {  in pps_cdev_ioctl()
235 			dev_err(pps->dev, "unsupported capabilities (%x)\n",  in pps_cdev_ioctl()
244 			dev_err(pps->dev, "invalid kernel consumer bind"  in pps_cdev_ioctl()
249 		err = pps_kc_bind(pps, &bind_args);  in pps_cdev_ioctl()
266 	struct pps_device *pps = file->private_data;  in pps_cdev_compat_ioctl()  local
276 		dev_dbg(pps->dev, "PPS_FETCH\n");  in pps_cdev_compat_ioctl()
285 		err = pps_cdev_pps_fetch(pps, &fdata);  in pps_cdev_compat_ioctl()
290 		spin_lock_irq(&pps->lock);  in pps_cdev_compat_ioctl()
292 		compat.info.assert_sequence = pps->assert_sequence;  in pps_cdev_compat_ioctl()
293 		compat.info.clear_sequence = pps->clear_sequence;  in pps_cdev_compat_ioctl()
294 		compat.info.current_mode = pps->current_mode;  in pps_cdev_compat_ioctl()
296 		memcpy(&compat.info.assert_tu, &pps->assert_tu,  in pps_cdev_compat_ioctl()
298 		memcpy(&compat.info.clear_tu, &pps->clear_tu,  in pps_cdev_compat_ioctl()
301 		spin_unlock_irq(&pps->lock);  in pps_cdev_compat_ioctl()
315 	struct pps_device *pps = container_of(inode->i_cdev,  in pps_cdev_open()  local
317 	file->private_data = pps;  in pps_cdev_open()
318 	kobject_get(&pps->dev->kobj);  in pps_cdev_open()
324 	struct pps_device *pps = container_of(inode->i_cdev,  in pps_cdev_release()  local
326 	kobject_put(&pps->dev->kobj);  in pps_cdev_release()
347 	struct pps_device *pps = dev_get_drvdata(dev);  in pps_device_destruct()  local
349 	cdev_del(&pps->cdev);  in pps_device_destruct()
352 	pr_debug("deallocating pps%d\n", pps->id);  in pps_device_destruct()
354 	idr_remove(&pps_idr, pps->id);  in pps_device_destruct()
358 	kfree(pps);  in pps_device_destruct()
361 int pps_register_cdev(struct pps_device *pps)  in pps_register_cdev()  argument
368 	 * Get new ID for the new PPS source.  After idr_alloc() calling  in pps_register_cdev()
371 	err = idr_alloc(&pps_idr, pps, 0, PPS_MAX_SOURCES, GFP_KERNEL);  in pps_register_cdev()
374 			pr_err("%s: too many PPS sources in the system\n",  in pps_register_cdev()
375 			       pps->info.name);  in pps_register_cdev()
380 	pps->id = err;  in pps_register_cdev()
383 	devt = MKDEV(MAJOR(pps_devt), pps->id);  in pps_register_cdev()
385 	cdev_init(&pps->cdev, &pps_cdev_fops);  in pps_register_cdev()
386 	pps->cdev.owner = pps->info.owner;  in pps_register_cdev()
388 	err = cdev_add(&pps->cdev, devt, 1);  in pps_register_cdev()
391 				pps->info.name, MAJOR(pps_devt), pps->id);  in pps_register_cdev()
394 	pps->dev = device_create(pps_class, pps->info.dev, devt, pps,  in pps_register_cdev()
395 							"pps%d", pps->id);  in pps_register_cdev()
396 	if (IS_ERR(pps->dev)) {  in pps_register_cdev()
397 		err = PTR_ERR(pps->dev);  in pps_register_cdev()
402 	pps->dev->release = pps_device_destruct;  in pps_register_cdev()
404 	pr_debug("source %s got cdev (%d:%d)\n", pps->info.name,  in pps_register_cdev()
405 			MAJOR(pps_devt), pps->id);  in pps_register_cdev()
410 	cdev_del(&pps->cdev);  in pps_register_cdev()
414 	idr_remove(&pps_idr, pps->id);  in pps_register_cdev()
420 void pps_unregister_cdev(struct pps_device *pps)  in pps_unregister_cdev()  argument
422 	pr_debug("unregistering pps%d\n", pps->id);  in pps_unregister_cdev()
423 	pps->lookup_cookie = NULL;  in pps_unregister_cdev()
424 	device_destroy(pps_class, pps->dev->devt);  in pps_unregister_cdev()
428  * Look up a pps device by magic cookie.
432  * This is a bit of a kludge that is currently used only by the PPS
437  * It's initialized to NULL when the pps device is created, and if a
441  * so that it will not be used again, even if the pps device cannot
447 	struct pps_device *pps;  in pps_lookup_dev()  local
451 	idr_for_each_entry(&pps_idr, pps, id)  in pps_lookup_dev()
452 		if (cookie == pps->lookup_cookie)  in pps_lookup_dev()
455 	return pps;  in pps_lookup_dev()
473 	pps_class = class_create(THIS_MODULE, "pps");  in pps_init()
480 	err = alloc_chrdev_region(&pps_devt, 0, PPS_MAX_SOURCES, "pps");  in pps_init()