1 // SPDX-License-Identifier: GPL-2.0
3  * core.c - contains all core device and protocol registration functions
18 #include <linux/dma-mapping.h>
28  * skip some blind probes.  ISAPNP typically enumerates only plug-in ISA
29  * devices, not built-in things like COM ports.
34 static void pnp_remove_protocol(struct pnp_protocol *protocol)  in pnp_remove_protocol()  argument
37 	list_del(&protocol->protocol_list);  in pnp_remove_protocol()
42  * pnp_register_protocol - adds a pnp protocol to the pnp layer
43  * @protocol: pointer to the corresponding pnp_protocol structure
47 int pnp_register_protocol(struct pnp_protocol *protocol)  in pnp_register_protocol()  argument
52 	INIT_LIST_HEAD(&protocol->devices);  in pnp_register_protocol()
53 	INIT_LIST_HEAD(&protocol->cards);  in pnp_register_protocol()
61 		if (cur->number == nodenum) {  in pnp_register_protocol()
67 	protocol->number = nodenum;  in pnp_register_protocol()
68 	dev_set_name(&protocol->dev, "pnp%d", nodenum);  in pnp_register_protocol()
70 	list_add_tail(&protocol->protocol_list, &pnp_protocols);  in pnp_register_protocol()
74 	ret = device_register(&protocol->dev);  in pnp_register_protocol()
76 		pnp_remove_protocol(protocol);  in pnp_register_protocol()
82  * pnp_unregister_protocol - removes a pnp protocol from the pnp layer
83  * @protocol: pointer to the corresponding pnp_protocol structure
85 void pnp_unregister_protocol(struct pnp_protocol *protocol)  in pnp_unregister_protocol()  argument
87 	pnp_remove_protocol(protocol);  in pnp_unregister_protocol()
88 	device_unregister(&protocol->dev);  in pnp_unregister_protocol()
93 	struct pnp_id *id;  in pnp_free_ids()  local
96 	id = dev->id;  in pnp_free_ids()
97 	while (id) {  in pnp_free_ids()
98 		next = id->next;  in pnp_free_ids()
99 		kfree(id);  in pnp_free_ids()
100 		id = next;  in pnp_free_ids()
106 	list_del(&pnp_res->list);  in pnp_free_resource()
114 	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {  in pnp_free_resources()
129 struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id,  in pnp_alloc_dev()  argument
139 	INIT_LIST_HEAD(&dev->resources);  in pnp_alloc_dev()
140 	INIT_LIST_HEAD(&dev->options);  in pnp_alloc_dev()
141 	dev->protocol = protocol;  in pnp_alloc_dev()
142 	dev->number = id;  in pnp_alloc_dev()
143 	dev->dma_mask = DMA_BIT_MASK(24);  in pnp_alloc_dev()
145 	dev->dev.parent = &dev->protocol->dev;  in pnp_alloc_dev()
146 	dev->dev.bus = &pnp_bus_type;  in pnp_alloc_dev()
147 	dev->dev.dma_mask = &dev->dma_mask;  in pnp_alloc_dev()
148 	dev->dev.coherent_dma_mask = dev->dma_mask;  in pnp_alloc_dev()
149 	dev->dev.release = &pnp_release_device;  in pnp_alloc_dev()
151 	dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);  in pnp_alloc_dev()
165 	list_del(&dev->global_list);  in pnp_delist_device()
166 	list_del(&dev->protocol_list);  in pnp_delist_device()
175 	dev->status = PNP_READY;  in __pnp_add_device()
179 	list_add_tail(&dev->global_list, &pnp_global);  in __pnp_add_device()
180 	list_add_tail(&dev->protocol_list, &dev->protocol->devices);  in __pnp_add_device()
184 	ret = device_register(&dev->dev);  in __pnp_add_device()
187 	else if (dev->protocol->can_wakeup)  in __pnp_add_device()
188 		device_set_wakeup_capable(&dev->dev,  in __pnp_add_device()
189 				dev->protocol->can_wakeup(dev));  in __pnp_add_device()
195  * pnp_add_device - adds a pnp device to the pnp layer
205 	struct pnp_id *id;  in pnp_add_device()  local
207 	if (dev->card)  in pnp_add_device()
208 		return -EINVAL;  in pnp_add_device()
215 	for (id = dev->id; id; id = id->next)  in pnp_add_device()
216 		len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);  in pnp_add_device()
218 	dev_dbg(&dev->dev, "%s device, IDs%s (%s)\n", dev->protocol->name, buf,  in pnp_add_device()
219 		dev->active ? "active" : "disabled");  in pnp_add_device()
226 	device_unregister(&dev->dev);  in __pnp_remove_device()