PNP: remove pnp_resource_table from internal get/set interfaces
[linux-2.6.git] / drivers / pnp / core.c
1 /*
2  * core.c - contains all core device and protocol registration functions
3  *
4  * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
5  */
6
7 #include <linux/pnp.h>
8 #include <linux/types.h>
9 #include <linux/list.h>
10 #include <linux/device.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/string.h>
14 #include <linux/slab.h>
15 #include <linux/errno.h>
16 #include <linux/dma-mapping.h>
17
18 #include "base.h"
19
20 static LIST_HEAD(pnp_protocols);
21 LIST_HEAD(pnp_global);
22 DEFINE_SPINLOCK(pnp_lock);
23
24 /*
25  * ACPI or PNPBIOS should tell us about all platform devices, so we can
26  * skip some blind probes.  ISAPNP typically enumerates only plug-in ISA
27  * devices, not built-in things like COM ports.
28  */
29 int pnp_platform_devices;
30 EXPORT_SYMBOL(pnp_platform_devices);
31
32 void *pnp_alloc(long size)
33 {
34         void *result;
35
36         result = kzalloc(size, GFP_KERNEL);
37         if (!result) {
38                 printk(KERN_ERR "pnp: Out of Memory\n");
39                 return NULL;
40         }
41         return result;
42 }
43
44 /**
45  * pnp_protocol_register - adds a pnp protocol to the pnp layer
46  * @protocol: pointer to the corresponding pnp_protocol structure
47  *
48  *  Ex protocols: ISAPNP, PNPBIOS, etc
49  */
50 int pnp_register_protocol(struct pnp_protocol *protocol)
51 {
52         int nodenum;
53         struct list_head *pos;
54
55         INIT_LIST_HEAD(&protocol->devices);
56         INIT_LIST_HEAD(&protocol->cards);
57         nodenum = 0;
58         spin_lock(&pnp_lock);
59
60         /* assign the lowest unused number */
61         list_for_each(pos, &pnp_protocols) {
62                 struct pnp_protocol *cur = to_pnp_protocol(pos);
63                 if (cur->number == nodenum) {
64                         pos = &pnp_protocols;
65                         nodenum++;
66                 }
67         }
68
69         list_add_tail(&protocol->protocol_list, &pnp_protocols);
70         spin_unlock(&pnp_lock);
71
72         protocol->number = nodenum;
73         sprintf(protocol->dev.bus_id, "pnp%d", nodenum);
74         return device_register(&protocol->dev);
75 }
76
77 /**
78  * pnp_protocol_unregister - removes a pnp protocol from the pnp layer
79  * @protocol: pointer to the corresponding pnp_protocol structure
80  */
81 void pnp_unregister_protocol(struct pnp_protocol *protocol)
82 {
83         spin_lock(&pnp_lock);
84         list_del(&protocol->protocol_list);
85         spin_unlock(&pnp_lock);
86         device_unregister(&protocol->dev);
87 }
88
89 static void pnp_free_ids(struct pnp_dev *dev)
90 {
91         struct pnp_id *id;
92         struct pnp_id *next;
93
94         id = dev->id;
95         while (id) {
96                 next = id->next;
97                 kfree(id);
98                 id = next;
99         }
100 }
101
102 static void pnp_release_device(struct device *dmdev)
103 {
104         struct pnp_dev *dev = to_pnp_dev(dmdev);
105
106         pnp_free_option(dev->independent);
107         pnp_free_option(dev->dependent);
108         pnp_free_ids(dev);
109         kfree(dev);
110 }
111
112 struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id, char *pnpid)
113 {
114         struct pnp_dev *dev;
115         struct pnp_id *dev_id;
116
117         dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
118         if (!dev)
119                 return NULL;
120
121         dev->protocol = protocol;
122         dev->number = id;
123         dev->dma_mask = DMA_24BIT_MASK;
124
125         dev->dev.parent = &dev->protocol->dev;
126         dev->dev.bus = &pnp_bus_type;
127         dev->dev.dma_mask = &dev->dma_mask;
128         dev->dev.coherent_dma_mask = dev->dma_mask;
129         dev->dev.release = &pnp_release_device;
130
131         sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number,
132                 dev->number);
133
134         dev_id = pnp_add_id(dev, pnpid);
135         if (!dev_id) {
136                 kfree(dev);
137                 return NULL;
138         }
139
140         return dev;
141 }
142
143 int __pnp_add_device(struct pnp_dev *dev)
144 {
145         int ret;
146
147         pnp_fixup_device(dev);
148         dev->status = PNP_READY;
149         spin_lock(&pnp_lock);
150         list_add_tail(&dev->global_list, &pnp_global);
151         list_add_tail(&dev->protocol_list, &dev->protocol->devices);
152         spin_unlock(&pnp_lock);
153
154         ret = device_register(&dev->dev);
155         if (ret)
156                 return ret;
157
158         pnp_interface_attach_device(dev);
159         return 0;
160 }
161
162 /*
163  * pnp_add_device - adds a pnp device to the pnp layer
164  * @dev: pointer to dev to add
165  *
166  *  adds to driver model, name database, fixups, interface, etc.
167  */
168 int pnp_add_device(struct pnp_dev *dev)
169 {
170         int ret;
171
172         if (dev->card)
173                 return -EINVAL;
174
175         ret = __pnp_add_device(dev);
176         if (ret)
177                 return ret;
178
179 #ifdef CONFIG_PNP_DEBUG
180         {
181                 struct pnp_id *id;
182
183                 dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs",
184                         dev->protocol->name);
185                 for (id = dev->id; id; id = id->next)
186                         printk(" %s", id->id);
187                 printk(" (%s)\n", dev->active ? "active" : "disabled");
188         }
189 #endif
190         return 0;
191 }
192
193 void __pnp_remove_device(struct pnp_dev *dev)
194 {
195         spin_lock(&pnp_lock);
196         list_del(&dev->global_list);
197         list_del(&dev->protocol_list);
198         spin_unlock(&pnp_lock);
199         device_unregister(&dev->dev);
200 }
201
202 static int __init pnp_init(void)
203 {
204         printk(KERN_INFO "Linux Plug and Play Support v0.97 (c) Adam Belay\n");
205         return bus_register(&pnp_bus_type);
206 }
207
208 subsys_initcall(pnp_init);