]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/pnp/core.c
2 * core.c - contains all core device and protocol registration functions
4 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
9 #include <linux/types.h>
10 #include <linux/list.h>
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/string.h>
15 #include <linux/slab.h>
16 #include <linux/errno.h>
21 static LIST_HEAD(pnp_protocols
);
22 LIST_HEAD(pnp_global
);
23 DEFINE_SPINLOCK(pnp_lock
);
25 void *pnp_alloc(long size
)
29 result
= kmalloc(size
, GFP_KERNEL
);
31 printk(KERN_ERR
"pnp: Out of Memory\n");
34 memset(result
, 0, size
);
39 * pnp_protocol_register - adds a pnp protocol to the pnp layer
40 * @protocol: pointer to the corresponding pnp_protocol structure
42 * Ex protocols: ISAPNP, PNPBIOS, etc
45 int pnp_register_protocol(struct pnp_protocol
*protocol
)
48 struct list_head
* pos
;
53 INIT_LIST_HEAD(&protocol
->devices
);
54 INIT_LIST_HEAD(&protocol
->cards
);
58 /* assign the lowest unused number */
59 list_for_each(pos
,&pnp_protocols
) {
60 struct pnp_protocol
* cur
= to_pnp_protocol(pos
);
61 if (cur
->number
== nodenum
){
67 list_add_tail(&protocol
->protocol_list
, &pnp_protocols
);
68 spin_unlock(&pnp_lock
);
70 protocol
->number
= nodenum
;
71 sprintf(protocol
->dev
.bus_id
, "pnp%d", nodenum
);
72 return device_register(&protocol
->dev
);
76 * pnp_protocol_unregister - removes a pnp protocol from the pnp layer
77 * @protocol: pointer to the corresponding pnp_protocol structure
80 void pnp_unregister_protocol(struct pnp_protocol
*protocol
)
83 list_del(&protocol
->protocol_list
);
84 spin_unlock(&pnp_lock
);
85 device_unregister(&protocol
->dev
);
89 static void pnp_free_ids(struct pnp_dev
*dev
)
103 static void pnp_release_device(struct device
*dmdev
)
105 struct pnp_dev
* dev
= to_pnp_dev(dmdev
);
106 pnp_free_option(dev
->independent
);
107 pnp_free_option(dev
->dependent
);
112 int __pnp_add_device(struct pnp_dev
*dev
)
115 pnp_fixup_device(dev
);
116 dev
->dev
.bus
= &pnp_bus_type
;
117 dev
->dev
.release
= &pnp_release_device
;
118 dev
->status
= PNP_READY
;
119 spin_lock(&pnp_lock
);
120 list_add_tail(&dev
->global_list
, &pnp_global
);
121 list_add_tail(&dev
->protocol_list
, &dev
->protocol
->devices
);
122 spin_unlock(&pnp_lock
);
124 ret
= device_register(&dev
->dev
);
126 pnp_interface_attach_device(dev
);
131 * pnp_add_device - adds a pnp device to the pnp layer
132 * @dev: pointer to dev to add
134 * adds to driver model, name database, fixups, interface, etc.
137 int pnp_add_device(struct pnp_dev
*dev
)
139 if (!dev
|| !dev
->protocol
|| dev
->card
)
141 dev
->dev
.parent
= &dev
->protocol
->dev
;
142 sprintf(dev
->dev
.bus_id
, "%02x:%02x", dev
->protocol
->number
, dev
->number
);
143 return __pnp_add_device(dev
);
146 void __pnp_remove_device(struct pnp_dev
*dev
)
148 spin_lock(&pnp_lock
);
149 list_del(&dev
->global_list
);
150 list_del(&dev
->protocol_list
);
151 spin_unlock(&pnp_lock
);
152 device_unregister(&dev
->dev
);
156 * pnp_remove_device - removes a pnp device from the pnp layer
157 * @dev: pointer to dev to add
159 * this function will free all mem used by dev
162 void pnp_remove_device(struct pnp_dev
*dev
)
164 if (!dev
|| dev
->card
)
166 __pnp_remove_device(dev
);
170 static int __init
pnp_init(void)
172 printk(KERN_INFO
"Linux Plug and Play Support v0.97 (c) Adam Belay\n");
173 return bus_register(&pnp_bus_type
);
176 subsys_initcall(pnp_init
);
179 EXPORT_SYMBOL(pnp_register_protocol
);
180 EXPORT_SYMBOL(pnp_unregister_protocol
);
181 EXPORT_SYMBOL(pnp_add_device
);
182 EXPORT_SYMBOL(pnp_remove_device
);