3  * PPS core file
40 	struct pps_device *pps = file->private_data;  in pps_cdev_poll()  local
42 	poll_wait(file, &pps->queue, wait);  in pps_cdev_poll()
49 	struct pps_device *pps = file->private_data;  in pps_cdev_fasync()  local
50 	return fasync_helper(fd, file, on, &pps->async_queue);  in pps_cdev_fasync()
53 static int pps_cdev_pps_fetch(struct pps_device *pps, struct pps_fdata *fdata)  in pps_cdev_pps_fetch()  argument
55 	unsigned int ev = pps->last_ev;  in pps_cdev_pps_fetch()
60 		err = wait_event_interruptible(pps->queue,  in pps_cdev_pps_fetch()
61 				ev != pps->last_ev);  in pps_cdev_pps_fetch()
65 		dev_dbg(pps->dev, "timeout %lld.%09d\n",  in pps_cdev_pps_fetch()
73 					pps->queue,  in pps_cdev_pps_fetch()
74 					ev != pps->last_ev,  in pps_cdev_pps_fetch()
83 		dev_dbg(pps->dev, "pending signal caught\n");  in pps_cdev_pps_fetch()
93 	struct pps_device *pps = file->private_data;  in pps_cdev_ioctl()  local
101 		dev_dbg(pps->dev, "PPS_GETPARAMS\n");  in pps_cdev_ioctl()
103 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
106 		params = pps->params;  in pps_cdev_ioctl()
108 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
117 		dev_dbg(pps->dev, "PPS_SETPARAMS\n");  in pps_cdev_ioctl()
127 			dev_dbg(pps->dev, "capture mode unspecified (%x)\n",  in pps_cdev_ioctl()
133 		if ((params.mode & ~pps->info.mode) != 0) {  in pps_cdev_ioctl()
134 			dev_dbg(pps->dev, "unsupported capabilities (%x)\n",  in pps_cdev_ioctl()
139 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
142 		pps->params = params;  in pps_cdev_ioctl()
147 			dev_dbg(pps->dev, "time format unspecified (%x)\n",  in pps_cdev_ioctl()
149 			pps->params.mode |= PPS_TSFMT_TSPEC;  in pps_cdev_ioctl()
151 		if (pps->info.mode & PPS_CANWAIT)  in pps_cdev_ioctl()
152 			pps->params.mode |= PPS_CANWAIT;  in pps_cdev_ioctl()
153 		pps->params.api_version = PPS_API_VERS;  in pps_cdev_ioctl()
160 		pps->params.assert_off_tu.flags = 0;  in pps_cdev_ioctl()
161 		pps->params.clear_off_tu.flags = 0;  in pps_cdev_ioctl()
163 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
168 		dev_dbg(pps->dev, "PPS_GETCAP\n");  in pps_cdev_ioctl()
170 		err = put_user(pps->info.mode, iuarg);  in pps_cdev_ioctl()
179 		dev_dbg(pps->dev, "PPS_FETCH\n");  in pps_cdev_ioctl()
185 		err = pps_cdev_pps_fetch(pps, &fdata);  in pps_cdev_ioctl()
190 		spin_lock_irq(&pps->lock);  in pps_cdev_ioctl()
192 		fdata.info.assert_sequence = pps->assert_sequence;  in pps_cdev_ioctl()
193 		fdata.info.clear_sequence = pps->clear_sequence;  in pps_cdev_ioctl()
194 		fdata.info.assert_tu = pps->assert_tu;  in pps_cdev_ioctl()
195 		fdata.info.clear_tu = pps->clear_tu;  in pps_cdev_ioctl()
196 		fdata.info.current_mode = pps->current_mode;  in pps_cdev_ioctl()
198 		spin_unlock_irq(&pps->lock);  in pps_cdev_ioctl()
209 		dev_dbg(pps->dev, "PPS_KC_BIND\n");  in pps_cdev_ioctl()
220 		if ((bind_args.edge & ~pps->info.mode) != 0) {  in pps_cdev_ioctl()
221 			dev_err(pps->dev, "unsupported capabilities (%x)\n",  in pps_cdev_ioctl()
230 			dev_err(pps->dev, "invalid kernel consumer bind"  in pps_cdev_ioctl()
235 		err = pps_kc_bind(pps, &bind_args);  in pps_cdev_ioctl()
252 	struct pps_device *pps = file->private_data;  in pps_cdev_compat_ioctl()  local
262 		dev_dbg(pps->dev, "PPS_FETCH\n");  in pps_cdev_compat_ioctl()
271 		err = pps_cdev_pps_fetch(pps, &fdata);  in pps_cdev_compat_ioctl()
276 		spin_lock_irq(&pps->lock);  in pps_cdev_compat_ioctl()
278 		compat.info.assert_sequence = pps->assert_sequence;  in pps_cdev_compat_ioctl()
279 		compat.info.clear_sequence = pps->clear_sequence;  in pps_cdev_compat_ioctl()
280 		compat.info.current_mode = pps->current_mode;  in pps_cdev_compat_ioctl()
282 		memcpy(&compat.info.assert_tu, &pps->assert_tu,  in pps_cdev_compat_ioctl()
284 		memcpy(&compat.info.clear_tu, &pps->clear_tu,  in pps_cdev_compat_ioctl()
287 		spin_unlock_irq(&pps->lock);  in pps_cdev_compat_ioctl()
301 	struct pps_device *pps = container_of(inode->i_cdev,  in pps_cdev_open()  local
303 	file->private_data = pps;  in pps_cdev_open()
304 	kobject_get(&pps->dev->kobj);  in pps_cdev_open()
310 	struct pps_device *pps = container_of(inode->i_cdev,  in pps_cdev_release()  local
312 	kobject_put(&pps->dev->kobj);  in pps_cdev_release()
333 	struct pps_device *pps = dev_get_drvdata(dev);  in pps_device_destruct()  local
335 	cdev_del(&pps->cdev);  in pps_device_destruct()
338 	pr_debug("deallocating pps%d\n", pps->id);  in pps_device_destruct()
340 	idr_remove(&pps_idr, pps->id);  in pps_device_destruct()
344 	kfree(pps);  in pps_device_destruct()
347 int pps_register_cdev(struct pps_device *pps)  in pps_register_cdev()  argument
354 	 * Get new ID for the new PPS source.  After idr_alloc() calling  in pps_register_cdev()
357 	err = idr_alloc(&pps_idr, pps, 0, PPS_MAX_SOURCES, GFP_KERNEL);  in pps_register_cdev()
360 			pr_err("%s: too many PPS sources in the system\n",  in pps_register_cdev()
361 			       pps->info.name);  in pps_register_cdev()
366 	pps->id = err;  in pps_register_cdev()
369 	devt = MKDEV(MAJOR(pps_devt), pps->id);  in pps_register_cdev()
371 	cdev_init(&pps->cdev, &pps_cdev_fops);  in pps_register_cdev()
372 	pps->cdev.owner = pps->info.owner;  in pps_register_cdev()
374 	err = cdev_add(&pps->cdev, devt, 1);  in pps_register_cdev()
377 				pps->info.name, MAJOR(pps_devt), pps->id);  in pps_register_cdev()
380 	pps->dev = device_create(pps_class, pps->info.dev, devt, pps,  in pps_register_cdev()
381 							"pps%d", pps->id);  in pps_register_cdev()
382 	if (IS_ERR(pps->dev)) {  in pps_register_cdev()
383 		err = PTR_ERR(pps->dev);  in pps_register_cdev()
388 	pps->dev->release = pps_device_destruct;  in pps_register_cdev()
390 	pr_debug("source %s got cdev (%d:%d)\n", pps->info.name,  in pps_register_cdev()
391 			MAJOR(pps_devt), pps->id);  in pps_register_cdev()
396 	cdev_del(&pps->cdev);  in pps_register_cdev()
400 	idr_remove(&pps_idr, pps->id);  in pps_register_cdev()
406 void pps_unregister_cdev(struct pps_device *pps)  in pps_unregister_cdev()  argument
408 	pr_debug("unregistering pps%d\n", pps->id);  in pps_unregister_cdev()
409 	pps->lookup_cookie = NULL;  in pps_unregister_cdev()
410 	device_destroy(pps_class, pps->dev->devt);  in pps_unregister_cdev()
414  * Look up a pps device by magic cookie.
418  * This is a bit of a kludge that is currently used only by the PPS
423  * It's initialized to NULL when the pps device is created, and if a
427  * so that it will not be used again, even if the pps device cannot
433 	struct pps_device *pps;  in pps_lookup_dev()  local
437 	idr_for_each_entry(&pps_idr, pps, id)  in pps_lookup_dev()
438 		if (cookie == pps->lookup_cookie)  in pps_lookup_dev()
441 	return pps;  in pps_lookup_dev()
459 	pps_class = class_create(THIS_MODULE, "pps");  in pps_init()
466 	err = alloc_chrdev_region(&pps_devt, 0, PPS_MAX_SOURCES, "pps");  in pps_init()