3  * PTP 1588 clock support
29 	.name = "ptp",
96 	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);  in ptp_clock_settime()  local
98 	if (ptp_clock_freerun(ptp)) {  in ptp_clock_settime()
99 		pr_err("ptp: physical clock is free running\n");  in ptp_clock_settime()
103 	return  ptp->info->settime64(ptp->info, tp);  in ptp_clock_settime()
108 	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);  in ptp_clock_gettime()  local
111 	if (ptp->info->gettimex64)  in ptp_clock_gettime()
112 		err = ptp->info->gettimex64(ptp->info, tp, NULL);  in ptp_clock_gettime()
114 		err = ptp->info->gettime64(ptp->info, tp);  in ptp_clock_gettime()
120 	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);  in ptp_clock_adjtime()  local
124 	if (ptp_clock_freerun(ptp)) {  in ptp_clock_adjtime()
125 		pr_err("ptp: physical clock is free running\n");  in ptp_clock_adjtime()
129 	ops = ptp->info;  in ptp_clock_adjtime()
154 			ptp->dialed_frequency = tx->freq;  in ptp_clock_adjtime()
169 		tx->freq = ptp->dialed_frequency;  in ptp_clock_adjtime()
191 	struct ptp_clock *ptp = container_of(dev, struct ptp_clock, dev);  in ptp_clock_release()  local
195 	ptp_cleanup_pin_groups(ptp);  in ptp_clock_release()
196 	kfree(ptp->vclock_index);  in ptp_clock_release()
197 	mutex_destroy(&ptp->pincfg_mux);  in ptp_clock_release()
198 	mutex_destroy(&ptp->n_vclocks_mux);  in ptp_clock_release()
200 	spin_lock_irqsave(&ptp->tsevqs_lock, flags);  in ptp_clock_release()
201 	tsevq = list_first_entry(&ptp->tsevqs, struct timestamp_event_queue,  in ptp_clock_release()
204 	spin_unlock_irqrestore(&ptp->tsevqs_lock, flags);  in ptp_clock_release()
207 	debugfs_remove(ptp->debugfs_root);  in ptp_clock_release()
208 	xa_erase(&ptp_clocks_map, ptp->index);  in ptp_clock_release()
209 	kfree(ptp);  in ptp_clock_release()
220 static int ptp_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *request, int on)  in ptp_enable()  argument
227 	struct ptp_clock *ptp = container_of(work, struct ptp_clock,  in ptp_aux_kworker()  local
229 	struct ptp_clock_info *info = ptp->info;  in ptp_aux_kworker()
235 		kthread_queue_delayed_work(ptp->kworker, &ptp->aux_work, delay);  in ptp_aux_kworker()
243 	struct ptp_clock *ptp;  in ptp_clock_register()  local
253 	ptp = kzalloc(sizeof(struct ptp_clock), GFP_KERNEL);  in ptp_clock_register()
254 	if (!ptp) {  in ptp_clock_register()
259 	err = xa_alloc(&ptp_clocks_map, &index, ptp, xa_limit_31b,  in ptp_clock_register()
264 	ptp->clock.ops = ptp_clock_ops;  in ptp_clock_register()
265 	ptp->info = info;  in ptp_clock_register()
266 	ptp->devid = MKDEV(major, index);  in ptp_clock_register()
267 	ptp->index = index;  in ptp_clock_register()
268 	INIT_LIST_HEAD(&ptp->tsevqs);  in ptp_clock_register()
274 	list_add_tail(&queue->qlist, &ptp->tsevqs);  in ptp_clock_register()
275 	spin_lock_init(&ptp->tsevqs_lock);  in ptp_clock_register()
283 	mutex_init(&ptp->pincfg_mux);  in ptp_clock_register()
284 	mutex_init(&ptp->n_vclocks_mux);  in ptp_clock_register()
285 	init_waitqueue_head(&ptp->tsev_wq);  in ptp_clock_register()
287 	if (ptp->info->getcycles64 || ptp->info->getcyclesx64) {  in ptp_clock_register()
288 		ptp->has_cycles = true;  in ptp_clock_register()
289 		if (!ptp->info->getcycles64 && ptp->info->getcyclesx64)  in ptp_clock_register()
290 			ptp->info->getcycles64 = ptp_getcycles64;  in ptp_clock_register()
293 		ptp->info->getcycles64 = ptp_getcycles64;  in ptp_clock_register()
295 		if (ptp->info->gettimex64)  in ptp_clock_register()
296 			ptp->info->getcyclesx64 = ptp->info->gettimex64;  in ptp_clock_register()
298 		if (ptp->info->getcrosststamp)  in ptp_clock_register()
299 			ptp->info->getcrosscycles = ptp->info->getcrosststamp;  in ptp_clock_register()
302 	if (!ptp->info->enable)  in ptp_clock_register()
303 		ptp->info->enable = ptp_enable;  in ptp_clock_register()
305 	if (ptp->info->do_aux_work) {  in ptp_clock_register()
306 		kthread_init_delayed_work(&ptp->aux_work, ptp_aux_kworker);  in ptp_clock_register()
307 		ptp->kworker = kthread_run_worker(0, "ptp%d", ptp->index);  in ptp_clock_register()
308 		if (IS_ERR(ptp->kworker)) {  in ptp_clock_register()
309 			err = PTR_ERR(ptp->kworker);  in ptp_clock_register()
310 			pr_err("failed to create ptp aux_worker %d\n", err);  in ptp_clock_register()
315 	/* PTP virtual clock is being registered under physical clock */  in ptp_clock_register()
317 	    strcmp(parent->class->name, "ptp") == 0)  in ptp_clock_register()
318 		ptp->is_virtual_clock = true;  in ptp_clock_register()
320 	if (!ptp->is_virtual_clock) {  in ptp_clock_register()
321 		ptp->max_vclocks = PTP_DEFAULT_MAX_VCLOCKS;  in ptp_clock_register()
323 		size = sizeof(int) * ptp->max_vclocks;  in ptp_clock_register()
324 		ptp->vclock_index = kzalloc(size, GFP_KERNEL);  in ptp_clock_register()
325 		if (!ptp->vclock_index) {  in ptp_clock_register()
331 	err = ptp_populate_pin_groups(ptp);  in ptp_clock_register()
339 		snprintf(pps.name, PPS_MAX_NAME_LEN, "ptp%d", index);  in ptp_clock_register()
342 		ptp->pps_source = pps_register_source(&pps, PTP_PPS_DEFAULTS);  in ptp_clock_register()
343 		if (IS_ERR(ptp->pps_source)) {  in ptp_clock_register()
344 			err = PTR_ERR(ptp->pps_source);  in ptp_clock_register()
348 		ptp->pps_source->lookup_cookie = ptp;  in ptp_clock_register()
352 	device_initialize(&ptp->dev);  in ptp_clock_register()
353 	ptp->dev.devt = ptp->devid;  in ptp_clock_register()
354 	ptp->dev.class = &ptp_class;  in ptp_clock_register()
355 	ptp->dev.parent = parent;  in ptp_clock_register()
356 	ptp->dev.groups = ptp->pin_attr_groups;  in ptp_clock_register()
357 	ptp->dev.release = ptp_clock_release;  in ptp_clock_register()
358 	dev_set_drvdata(&ptp->dev, ptp);  in ptp_clock_register()
359 	dev_set_name(&ptp->dev, "ptp%d", ptp->index);  in ptp_clock_register()
362 	err = posix_clock_register(&ptp->clock, &ptp->dev);  in ptp_clock_register()
364 		if (ptp->pps_source)  in ptp_clock_register()
365 			pps_unregister_source(ptp->pps_source);  in ptp_clock_register()
367 		if (ptp->kworker)  in ptp_clock_register()
368 			kthread_destroy_worker(ptp->kworker);  in ptp_clock_register()
370 		put_device(&ptp->dev);  in ptp_clock_register()
377 	snprintf(debugfsname, sizeof(debugfsname), "ptp%d", ptp->index);  in ptp_clock_register()
378 	ptp->debugfs_root = debugfs_create_dir(debugfsname, NULL);  in ptp_clock_register()
380 	return ptp;  in ptp_clock_register()
383 	ptp_cleanup_pin_groups(ptp);  in ptp_clock_register()
385 	kfree(ptp->vclock_index);  in ptp_clock_register()
387 	if (ptp->kworker)  in ptp_clock_register()
388 		kthread_destroy_worker(ptp->kworker);  in ptp_clock_register()
390 	mutex_destroy(&ptp->pincfg_mux);  in ptp_clock_register()
391 	mutex_destroy(&ptp->n_vclocks_mux);  in ptp_clock_register()
399 	kfree(ptp);  in ptp_clock_register()
407 	struct ptp_clock *ptp = dev_get_drvdata(dev);  in unregister_vclock()  local
409 	ptp_vclock_unregister(info_to_vclock(ptp->info));  in unregister_vclock()
413 int ptp_clock_unregister(struct ptp_clock *ptp)  in ptp_clock_unregister()  argument
415 	if (ptp_vclock_in_use(ptp)) {  in ptp_clock_unregister()
416 		device_for_each_child(&ptp->dev, NULL, unregister_vclock);  in ptp_clock_unregister()
419 	ptp->defunct = 1;  in ptp_clock_unregister()
420 	wake_up_interruptible(&ptp->tsev_wq);  in ptp_clock_unregister()
422 	if (ptp->kworker) {  in ptp_clock_unregister()
423 		kthread_cancel_delayed_work_sync(&ptp->aux_work);  in ptp_clock_unregister()
424 		kthread_destroy_worker(ptp->kworker);  in ptp_clock_unregister()
428 	if (ptp->pps_source)  in ptp_clock_unregister()
429 		pps_unregister_source(ptp->pps_source);  in ptp_clock_unregister()
431 	posix_clock_unregister(&ptp->clock);  in ptp_clock_unregister()
437 void ptp_clock_event(struct ptp_clock *ptp, struct ptp_clock_event *event)  in ptp_clock_event()  argument
451 		spin_lock_irqsave(&ptp->tsevqs_lock, flags);  in ptp_clock_event()
452 		list_for_each_entry(tsevq, &ptp->tsevqs, qlist) {  in ptp_clock_event()
456 		spin_unlock_irqrestore(&ptp->tsevqs_lock, flags);  in ptp_clock_event()
457 		wake_up_interruptible(&ptp->tsev_wq);  in ptp_clock_event()
462 		pps_event(ptp->pps_source, &evt, PTP_PPS_EVENT, NULL);  in ptp_clock_event()
466 		pps_event(ptp->pps_source, &event->pps_times,  in ptp_clock_event()
473 int ptp_clock_index(struct ptp_clock *ptp)  in ptp_clock_index()  argument
475 	return ptp->index;  in ptp_clock_index()
479 int ptp_find_pin(struct ptp_clock *ptp,  in ptp_find_pin()  argument
485 	for (i = 0; i < ptp->info->n_pins; i++) {  in ptp_find_pin()
486 		if (ptp->info->pin_config[i].func == func &&  in ptp_find_pin()
487 		    ptp->info->pin_config[i].chan == chan) {  in ptp_find_pin()
488 			pin = &ptp->info->pin_config[i];  in ptp_find_pin()
497 int ptp_find_pin_unlocked(struct ptp_clock *ptp,  in ptp_find_pin_unlocked()  argument
502 	mutex_lock(&ptp->pincfg_mux);  in ptp_find_pin_unlocked()
504 	result = ptp_find_pin(ptp, func, chan);  in ptp_find_pin_unlocked()
506 	mutex_unlock(&ptp->pincfg_mux);  in ptp_find_pin_unlocked()
512 int ptp_schedule_worker(struct ptp_clock *ptp, unsigned long delay)  in ptp_schedule_worker()  argument
514 	return kthread_mod_delayed_work(ptp->kworker, &ptp->aux_work, delay);  in ptp_schedule_worker()
518 void ptp_cancel_worker_sync(struct ptp_clock *ptp)  in ptp_cancel_worker_sync()  argument
520 	kthread_cancel_delayed_work_sync(&ptp->aux_work);  in ptp_cancel_worker_sync()
539 		pr_err("ptp: failed to allocate class\n");  in ptp_init()
543 	err = alloc_chrdev_region(&ptp_devt, 0, MINORMASK + 1, "ptp");  in ptp_init()
545 		pr_err("ptp: failed to allocate device region\n");  in ptp_init()
549 	pr_info("PTP clock support registered\n");  in ptp_init()
561 MODULE_DESCRIPTION("PTP clocks support");