3  * PPS core file
30 	.name		= "pps",
43 	struct pps_device *pps = file->private_data;  in pps_cdev_poll()  local
45 	poll_wait(file, &pps->queue, wait);  in pps_cdev_poll()
47 	if (pps->last_fetched_ev == pps->last_ev)  in pps_cdev_poll()
55 	struct pps_device *pps = file->private_data;  in pps_cdev_fasync()  local
56 	return fasync_helper(fd, file, on, &pps->async_queue);  in pps_cdev_fasync()
59 static int pps_cdev_pps_fetch(struct pps_device *pps, struct pps_fdata *fdata)  in pps_cdev_pps_fetch()  argument
61 	unsigned int ev = pps->last_ev;  in pps_cdev_pps_fetch()
66 		err = wait_event_interruptible(pps->queue,  in pps_cdev_pps_fetch()
67 				ev != pps->last_ev);  in pps_cdev_pps_fetch()
71 		dev_dbg(&pps->dev, "timeout %lld.%09d\n",  in pps_cdev_pps_fetch()
79 					pps->queue,  in pps_cdev_pps_fetch()
80 					ev != pps->last_ev,  in pps_cdev_pps_fetch()
89 		dev_dbg(&pps->dev, "pending signal caught\n");  in pps_cdev_pps_fetch()
99 	struct pps_device *pps = file->private_data;  in pps_cdev_ioctl()  local
107 		dev_dbg(&pps->dev, "PPS_GETPARAMS\n");  in pps_cdev_ioctl()
109 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
112 		params = pps->params;  in pps_cdev_ioctl()
114 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
123 		dev_dbg(&pps->dev, "PPS_SETPARAMS\n");  in pps_cdev_ioctl()
133 			dev_dbg(&pps->dev, "capture mode unspecified (%x)\n",  in pps_cdev_ioctl()
139 		if ((params.mode & ~pps->info.mode) != 0) {  in pps_cdev_ioctl()
140 			dev_dbg(&pps->dev, "unsupported capabilities (%x)\n",  in pps_cdev_ioctl()
145 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
148 		pps->params = params;  in pps_cdev_ioctl()
153 			dev_dbg(&pps->dev, "time format unspecified (%x)\n",  in pps_cdev_ioctl()
155 			pps->params.mode |= PPS_TSFMT_TSPEC;  in pps_cdev_ioctl()
157 		if (pps->info.mode & PPS_CANWAIT)  in pps_cdev_ioctl()
158 			pps->params.mode |= PPS_CANWAIT;  in pps_cdev_ioctl()
159 		pps->params.api_version = PPS_API_VERS;  in pps_cdev_ioctl()
166 		pps->params.assert_off_tu.flags = 0;  in pps_cdev_ioctl()
167 		pps->params.clear_off_tu.flags = 0;  in pps_cdev_ioctl()
169 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
174 		dev_dbg(&pps->dev, "PPS_GETCAP\n");  in pps_cdev_ioctl()
176 		err = put_user(pps->info.mode, iuarg);  in pps_cdev_ioctl()
185 		dev_dbg(&pps->dev, "PPS_FETCH\n");  in pps_cdev_ioctl()
191 		err = pps_cdev_pps_fetch(pps, &fdata);  in pps_cdev_ioctl()
196 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
198 		pps->last_fetched_ev = pps->last_ev;  in pps_cdev_ioctl()
200 		fdata.info.assert_sequence = pps->assert_sequence;  in pps_cdev_ioctl()
201 		fdata.info.clear_sequence = pps->clear_sequence;  in pps_cdev_ioctl()
202 		fdata.info.assert_tu = pps->assert_tu;  in pps_cdev_ioctl()
203 		fdata.info.clear_tu = pps->clear_tu;  in pps_cdev_ioctl()
204 		fdata.info.current_mode = pps->current_mode;  in pps_cdev_ioctl()
206 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
217 		dev_dbg(&pps->dev, "PPS_KC_BIND\n");  in pps_cdev_ioctl()
228 		if ((bind_args.edge & ~pps->info.mode) != 0) {  in pps_cdev_ioctl()
229 			dev_err(&pps->dev, "unsupported capabilities (%x)\n",  in pps_cdev_ioctl()
238 			dev_err(&pps->dev, "invalid kernel consumer bind"  in pps_cdev_ioctl()
243 		err = pps_kc_bind(pps, &bind_args);  in pps_cdev_ioctl()
260 	struct pps_device *pps = file->private_data;  in pps_cdev_compat_ioctl()  local
270 		dev_dbg(&pps->dev, "PPS_FETCH\n");  in pps_cdev_compat_ioctl()
279 		err = pps_cdev_pps_fetch(pps, &fdata);  in pps_cdev_compat_ioctl()
284 		spin_lock_irq(&pps->lock);  in pps_cdev_compat_ioctl()
286 		pps->last_fetched_ev = pps->last_ev;  in pps_cdev_compat_ioctl()
288 		compat.info.assert_sequence = pps->assert_sequence;  in pps_cdev_compat_ioctl()
289 		compat.info.clear_sequence = pps->clear_sequence;  in pps_cdev_compat_ioctl()
290 		compat.info.current_mode = pps->current_mode;  in pps_cdev_compat_ioctl()
292 		memcpy(&compat.info.assert_tu, &pps->assert_tu,  in pps_cdev_compat_ioctl()
294 		memcpy(&compat.info.clear_tu, &pps->clear_tu,  in pps_cdev_compat_ioctl()
297 		spin_unlock_irq(&pps->lock);  in pps_cdev_compat_ioctl()
311 	struct pps_device *pps;  in pps_idr_get()  local
314 	pps = idr_find(&pps_idr, id);  in pps_idr_get()
315 	if (pps)  in pps_idr_get()
316 		get_device(&pps->dev);  in pps_idr_get()
319 	return pps;  in pps_idr_get()
324 	struct pps_device *pps = pps_idr_get(iminor(inode));  in pps_cdev_open()  local
326 	if (!pps)  in pps_cdev_open()
329 	file->private_data = pps;  in pps_cdev_open()
335 	struct pps_device *pps = file->private_data;  in pps_cdev_release()  local
337 	WARN_ON(pps->id != iminor(inode));  in pps_cdev_release()
338 	put_device(&pps->dev);  in pps_cdev_release()
358 	struct pps_device *pps = dev_get_drvdata(dev);  in pps_device_destruct()  local
360 	pr_debug("deallocating pps%d\n", pps->id);  in pps_device_destruct()
361 	kfree(pps);  in pps_device_destruct()
364 int pps_register_cdev(struct pps_device *pps)  in pps_register_cdev()  argument
370 	 * Get new ID for the new PPS source.  After idr_alloc() calling  in pps_register_cdev()
373 	err = idr_alloc(&pps_idr, pps, 0, PPS_MAX_SOURCES, GFP_KERNEL);  in pps_register_cdev()
376 			pr_err("%s: too many PPS sources in the system\n",  in pps_register_cdev()
377 			       pps->info.name);  in pps_register_cdev()
380 		kfree(pps);  in pps_register_cdev()
383 	pps->id = err;  in pps_register_cdev()
385 	pps->dev.class = &pps_class;  in pps_register_cdev()
386 	pps->dev.parent = pps->info.dev;  in pps_register_cdev()
387 	pps->dev.devt = MKDEV(pps_major, pps->id);  in pps_register_cdev()
388 	dev_set_drvdata(&pps->dev, pps);  in pps_register_cdev()
389 	dev_set_name(&pps->dev, "pps%d", pps->id);  in pps_register_cdev()
390 	pps->dev.release = pps_device_destruct;  in pps_register_cdev()
391 	err = device_register(&pps->dev);  in pps_register_cdev()
395 	pr_debug("source %s got cdev (%d:%d)\n", pps->info.name, pps_major,  in pps_register_cdev()
396 		 pps->id);  in pps_register_cdev()
398 	get_device(&pps->dev);  in pps_register_cdev()
403 	idr_remove(&pps_idr, pps->id);  in pps_register_cdev()
404 	put_device(&pps->dev);  in pps_register_cdev()
410 void pps_unregister_cdev(struct pps_device *pps)  in pps_unregister_cdev()  argument
412 	pr_debug("unregistering pps%d\n", pps->id);  in pps_unregister_cdev()
413 	pps->lookup_cookie = NULL;  in pps_unregister_cdev()
414 	device_destroy(&pps_class, pps->dev.devt);  in pps_unregister_cdev()
418 	idr_remove(&pps_idr, pps->id);  in pps_unregister_cdev()
419 	put_device(&pps->dev);  in pps_unregister_cdev()
424  * Look up a pps device by magic cookie.
428  * This is a bit of a kludge that is currently used only by the PPS
433  * It's initialized to NULL when the pps device is created, and if a
437  * so that it will not be used again, even if the pps device cannot
448 	struct pps_device *pps;  in pps_lookup_dev()  local
452 	idr_for_each_entry(&pps_idr, pps, id)  in pps_lookup_dev()
453 		if (cookie == pps->lookup_cookie)  in pps_lookup_dev()
456 	return pps;  in pps_lookup_dev()
467 	__unregister_chrdev(pps_major, 0, PPS_MAX_SOURCES, "pps");  in pps_exit()
480 	pps_major = __register_chrdev(0, 0, PPS_MAX_SOURCES, "pps",  in pps_init()