1 // SPDX-License-Identifier: GPL-2.0
3  * sysfs support for HD-audio core device
8 #include <linux/device.h>
20 static ssize_t type##_show(struct device *dev,			\
25 	return sprintf(buf, "0x%x\n", codec->type);		\
30 static ssize_t type##_show(struct device *dev,			\
36 		       codec->type ? codec->type : "");		\
49 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,  in modalias_show()
79  * Widget tree sysfs
81  * This is a tree showing the attributes of each widget.  It appears like
98 	struct device *dev = kobj_to_dev(kobj->parent->parent);  in get_codec_nid()
102 	ret = kstrtoint(kobj->name, 16, &nid);  in get_codec_nid()
117 	if (!wid_attr->show)  in widget_attr_show()
118 		return -EIO;  in widget_attr_show()
122 	return wid_attr->show(codec, nid, wid_attr, buf);  in widget_attr_show()
133 	if (!wid_attr->store)  in widget_attr_store()
134 		return -EIO;  in widget_attr_store()
138 	return wid_attr->store(codec, nid, wid_attr, buf, count);  in widget_attr_store()
190 	if (nid == codec->afg || nid == codec->mfg)  in has_pcm_cap()
222 	if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_IN_AMP))  in amp_in_caps_show()
231 	if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_OUT_AMP))  in amp_out_caps_show()
240 	if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_POWER))  in power_caps_show()
322 	struct hdac_widget_tree *tree = codec->widgets;  in widget_tree_free()  local
325 	if (!tree)  in widget_tree_free()
327 	free_widget_node(tree->afg, &widget_afg_group);  in widget_tree_free()
328 	if (tree->nodes) {  in widget_tree_free()
329 		for (p = tree->nodes; *p; p++)  in widget_tree_free()
331 		kfree(tree->nodes);  in widget_tree_free()
333 	kobject_put(tree->root);  in widget_tree_free()
334 	kfree(tree);  in widget_tree_free()
335 	codec->widgets = NULL;  in widget_tree_free()
346 		return -ENOMEM;  in add_widget_node()
365 	struct hdac_widget_tree *tree;  in widget_tree_create()  local
369 	tree = codec->widgets = kzalloc(sizeof(*tree), GFP_KERNEL);  in widget_tree_create()
370 	if (!tree)  in widget_tree_create()
371 		return -ENOMEM;  in widget_tree_create()
373 	tree->root = kobject_create_and_add("widgets", &codec->dev.kobj);  in widget_tree_create()
374 	if (!tree->root)  in widget_tree_create()
375 		return -ENOMEM;  in widget_tree_create()
377 	tree->nodes = kcalloc(codec->num_nodes + 1, sizeof(*tree->nodes),  in widget_tree_create()
379 	if (!tree->nodes)  in widget_tree_create()
380 		return -ENOMEM;  in widget_tree_create()
382 	for (i = 0, nid = codec->start_nid; i < codec->num_nodes; i++, nid++) {  in widget_tree_create()
383 		err = add_widget_node(tree->root, nid, &widget_node_group,  in widget_tree_create()
384 				      &tree->nodes[i]);  in widget_tree_create()
389 	if (codec->afg) {  in widget_tree_create()
390 		err = add_widget_node(tree->root, codec->afg,  in widget_tree_create()
391 				      &widget_afg_group, &tree->afg);  in widget_tree_create()
396 	kobject_uevent(tree->root, KOBJ_CHANGE);  in widget_tree_create()
400 /* call with codec->widget_lock held */
405 	if (codec->widgets)  in hda_widget_sysfs_init()
417 /* call with codec->widget_lock held */
423 /* call with codec->widget_lock held */
427 	struct hdac_widget_tree *tree;  in hda_widget_sysfs_reinit()  local
432 	if (!codec->widgets)  in hda_widget_sysfs_reinit()
435 	tree = kmemdup(codec->widgets, sizeof(*tree), GFP_KERNEL);  in hda_widget_sysfs_reinit()
436 	if (!tree)  in hda_widget_sysfs_reinit()
437 		return -ENOMEM;  in hda_widget_sysfs_reinit()
439 	tree->nodes = kcalloc(num_nodes + 1, sizeof(*tree->nodes), GFP_KERNEL);  in hda_widget_sysfs_reinit()
440 	if (!tree->nodes) {  in hda_widget_sysfs_reinit()
441 		kfree(tree);  in hda_widget_sysfs_reinit()
442 		return -ENOMEM;  in hda_widget_sysfs_reinit()
445 	/* prune non-existing nodes */  in hda_widget_sysfs_reinit()
446 	for (i = 0, nid = codec->start_nid; i < codec->num_nodes; i++, nid++) {  in hda_widget_sysfs_reinit()
448 			free_widget_node(codec->widgets->nodes[i],  in hda_widget_sysfs_reinit()
454 		if (nid < codec->start_nid || nid >= codec->end_nid)  in hda_widget_sysfs_reinit()
455 			add_widget_node(tree->root, nid, &widget_node_group,  in hda_widget_sysfs_reinit()
456 					&tree->nodes[i]);  in hda_widget_sysfs_reinit()
458 			tree->nodes[i] =  in hda_widget_sysfs_reinit()
459 				codec->widgets->nodes[nid - codec->start_nid];  in hda_widget_sysfs_reinit()
462 	/* replace with the new tree */  in hda_widget_sysfs_reinit()
463 	kfree(codec->widgets->nodes);  in hda_widget_sysfs_reinit()
464 	kfree(codec->widgets);  in hda_widget_sysfs_reinit()
465 	codec->widgets = tree;  in hda_widget_sysfs_reinit()
467 	kobject_uevent(tree->root, KOBJ_CHANGE);  in hda_widget_sysfs_reinit()