3  *  dpll_core.c - DPLL subsystem kernel-space interface implementation.
19 /* Mutex lock to protect DPLL subsystem devices and pins */
154 dpll_xa_ref_dpll_add(struct xarray *xa_dplls, struct dpll_device *dpll,  in dpll_xa_ref_dpll_add()  argument
164 		if (ref->dpll != dpll)  in dpll_xa_ref_dpll_add()
179 		ref->dpll = dpll;  in dpll_xa_ref_dpll_add()
181 		ret = xa_insert(xa_dplls, dpll->id, ref, GFP_KERNEL);  in dpll_xa_ref_dpll_add()
192 			xa_erase(xa_dplls, dpll->id);  in dpll_xa_ref_dpll_add()
208 dpll_xa_ref_dpll_del(struct xarray *xa_dplls, struct dpll_device *dpll,  in dpll_xa_ref_dpll_del()  argument
216 		if (ref->dpll != dpll)  in dpll_xa_ref_dpll_del()
245 	struct dpll_device *dpll;  in dpll_device_alloc()  local
248 	dpll = kzalloc(sizeof(*dpll), GFP_KERNEL);  in dpll_device_alloc()
249 	if (!dpll)  in dpll_device_alloc()
251 	refcount_set(&dpll->refcount, 1);  in dpll_device_alloc()
252 	INIT_LIST_HEAD(&dpll->registration_list);  in dpll_device_alloc()
253 	dpll->device_idx = device_idx;  in dpll_device_alloc()
254 	dpll->clock_id = clock_id;  in dpll_device_alloc()
255 	dpll->module = module;  in dpll_device_alloc()
256 	ret = xa_alloc_cyclic(&dpll_device_xa, &dpll->id, dpll, xa_limit_32b,  in dpll_device_alloc()
259 		kfree(dpll);  in dpll_device_alloc()
262 	xa_init_flags(&dpll->pin_refs, XA_FLAGS_ALLOC);  in dpll_device_alloc()
264 	return dpll;  in dpll_device_alloc()
268  * dpll_device_get - find existing or create new dpll device
273  * Get existing object of a dpll device, unique for given arguments.
284 	struct dpll_device *dpll, *ret = NULL;  in dpll_device_get()  local
288 	xa_for_each(&dpll_device_xa, index, dpll) {  in dpll_device_get()
289 		if (dpll->clock_id == clock_id &&  in dpll_device_get()
290 		    dpll->device_idx == device_idx &&  in dpll_device_get()
291 		    dpll->module == module) {  in dpll_device_get()
292 			ret = dpll;  in dpll_device_get()
307  * @dpll: dpll_device struct pointer
310  * Drop reference for a dpll device, if all references are gone, delete
311  * dpll device object.
313 void dpll_device_put(struct dpll_device *dpll)  in dpll_device_put()  argument
316 	if (refcount_dec_and_test(&dpll->refcount)) {  in dpll_device_put()
317 		ASSERT_DPLL_NOT_REGISTERED(dpll);  in dpll_device_put()
318 		WARN_ON_ONCE(!xa_empty(&dpll->pin_refs));  in dpll_device_put()
319 		xa_destroy(&dpll->pin_refs);  in dpll_device_put()
320 		xa_erase(&dpll_device_xa, dpll->id);  in dpll_device_put()
321 		WARN_ON(!list_empty(&dpll->registration_list));  in dpll_device_put()
322 		kfree(dpll);  in dpll_device_put()
329 dpll_device_registration_find(struct dpll_device *dpll,  in dpll_device_registration_find()  argument
334 	list_for_each_entry(reg, &dpll->registration_list, list) {  in dpll_device_registration_find()
342  * dpll_device_register - register the dpll device in the subsystem
343  * @dpll: pointer to a dpll
344  * @type: type of a dpll
345  * @ops: ops for a dpll device
348  * Make dpll device available for user space.
355 int dpll_device_register(struct dpll_device *dpll, enum dpll_type type,  in dpll_device_register()  argument
371 	reg = dpll_device_registration_find(dpll, ops, priv);  in dpll_device_register()
384 	dpll->type = type;  in dpll_device_register()
385 	first_registration = list_empty(&dpll->registration_list);  in dpll_device_register()
386 	list_add_tail(&reg->list, &dpll->registration_list);  in dpll_device_register()
392 	xa_set_mark(&dpll_device_xa, dpll->id, DPLL_REGISTERED);  in dpll_device_register()
393 	dpll_device_create_ntf(dpll);  in dpll_device_register()
401  * dpll_device_unregister - unregister dpll device
402  * @dpll: registered dpll pointer
403  * @ops: ops for a dpll device
410 void dpll_device_unregister(struct dpll_device *dpll,  in dpll_device_unregister()  argument
416 	ASSERT_DPLL_REGISTERED(dpll);  in dpll_device_unregister()
417 	dpll_device_delete_ntf(dpll);  in dpll_device_unregister()
418 	reg = dpll_device_registration_find(dpll, ops, priv);  in dpll_device_unregister()
426 	if (!list_empty(&dpll->registration_list)) {  in dpll_device_unregister()
430 	xa_clear_mark(&dpll_device_xa, dpll->id, DPLL_REGISTERED);  in dpll_device_unregister()
541  * dpll_pin_get - find existing or create new dpll pin
545  * @prop: dpll pin properties
603 __dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin,  in __dpll_pin_register()  argument
608 	ret = dpll_xa_ref_pin_add(&dpll->pin_refs, pin, ops, priv, cookie);  in __dpll_pin_register()
611 	ret = dpll_xa_ref_dpll_add(&pin->dpll_refs, dpll, ops, priv, cookie);  in __dpll_pin_register()
620 	dpll_xa_ref_pin_del(&dpll->pin_refs, pin, ops, priv, cookie);  in __dpll_pin_register()
625  * dpll_pin_register - register the dpll pin in the subsystem
626  * @dpll: pointer to a dpll
627  * @pin: pointer to a dpll pin
628  * @ops: ops for a dpll pin ops
637 dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin,  in dpll_pin_register()  argument
648 	if (WARN_ON(!(dpll->module == pin->module &&  in dpll_pin_register()
649 		      dpll->clock_id == pin->clock_id)))  in dpll_pin_register()
652 		ret = __dpll_pin_register(dpll, pin, ops, priv, NULL);  in dpll_pin_register()
660 __dpll_pin_unregister(struct dpll_device *dpll, struct dpll_pin *pin,  in __dpll_pin_unregister()  argument
664 	dpll_xa_ref_pin_del(&dpll->pin_refs, pin, ops, priv, cookie);  in __dpll_pin_unregister()
665 	dpll_xa_ref_dpll_del(&pin->dpll_refs, dpll, ops, priv, cookie);  in __dpll_pin_unregister()
671  * dpll_pin_unregister - unregister dpll pin from dpll device
672  * @dpll: registered dpll pointer
674  * @ops: ops for a dpll pin
680 void dpll_pin_unregister(struct dpll_device *dpll, struct dpll_pin *pin,  in dpll_pin_unregister()  argument
683 	if (WARN_ON(xa_empty(&dpll->pin_refs)))  in dpll_pin_unregister()
690 	__dpll_pin_unregister(dpll, pin, ops, priv, NULL);  in dpll_pin_unregister()
699  * @ops: ops for a dpll pin
731 		ret = __dpll_pin_register(ref->dpll, pin, ops, priv, parent);  in dpll_pin_on_pin_register()
745 			__dpll_pin_unregister(ref->dpll, pin, ops, priv,  in dpll_pin_on_pin_register()
758  * dpll_pin_on_pin_unregister - unregister dpll pin from a parent pin
761  * @ops: ops for a dpll pin
778 		__dpll_pin_unregister(ref->dpll, pin, ops, priv, parent);  in dpll_pin_on_pin_unregister()
784 dpll_device_registration_first(struct dpll_device *dpll)  in dpll_device_registration_first()  argument
788 	reg = list_first_entry_or_null((struct list_head *)&dpll->registration_list,  in dpll_device_registration_first()
794 void *dpll_priv(struct dpll_device *dpll)  in dpll_priv()  argument
798 	reg = dpll_device_registration_first(dpll);  in dpll_priv()
802 const struct dpll_device_ops *dpll_device_ops(struct dpll_device *dpll)  in dpll_device_ops()  argument
806 	reg = dpll_device_registration_first(dpll);  in dpll_device_ops()
821 void *dpll_pin_on_dpll_priv(struct dpll_device *dpll,  in dpll_pin_on_dpll_priv()  argument
827 	ref = xa_load(&dpll->pin_refs, pin->pin_idx);  in dpll_pin_on_dpll_priv()