PNP: fix up after Lindent
[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         if (!protocol)
56                 return -EINVAL;
57
58         INIT_LIST_HEAD(&protocol->devices);
59         INIT_LIST_HEAD(&protocol->cards);
60         nodenum = 0;
61         spin_lock(&pnp_lock);
62
63         /* assign the lowest unused number */
64         list_for_each(pos, &pnp_protocols) {
65                 struct pnp_protocol *cur = to_pnp_protocol(pos);
66                 if (cur->number == nodenum) {
67                         pos = &pnp_protocols;
68                         nodenum++;
69                 }
70         }
71
72         list_add_tail(&protocol->protocol_list, &pnp_protocols);
73         spin_unlock(&pnp_lock);
74
75         protocol->number = nodenum;
76         sprintf(protocol->dev.bus_id, "pnp%d", nodenum);
77         return device_register(&protocol->dev);
78 }
79
80 /**
81  * pnp_protocol_unregister - removes a pnp protocol from the pnp layer
82  * @protocol: pointer to the corresponding pnp_protocol structure
83  */
84 void pnp_unregister_protocol(struct pnp_protocol *protocol)
85 {
86         spin_lock(&pnp_lock);
87         list_del(&protocol->protocol_list);
88         spin_unlock(&pnp_lock);
89         device_unregister(&protocol->dev);
90 }
91
92 static void pnp_free_ids(struct pnp_dev *dev)
93 {
94         struct pnp_id *id;
95         struct pnp_id *next;
96
97         if (!dev)
98                 return;
99         id = dev->id;
100         while (id) {
101                 next = id->next;
102                 kfree(id);
103                 id = next;
104         }
105 }
106
107 static void pnp_release_device(struct device *dmdev)
108 {
109         struct pnp_dev *dev = to_pnp_dev(dmdev);
110
111         pnp_free_option(dev->independent);
112         pnp_free_option(dev->dependent);
113         pnp_free_ids(dev);
114         kfree(dev);
115 }
116
117 int __pnp_add_device(struct pnp_dev *dev)
118 {
119         int ret;
120
121         pnp_fixup_device(dev);
122         dev->dev.bus = &pnp_bus_type;
123         dev->dev.dma_mask = &dev->dma_mask;
124         dev->dma_mask = dev->dev.coherent_dma_mask = DMA_24BIT_MASK;
125         dev->dev.release = &pnp_release_device;
126         dev->status = PNP_READY;
127         spin_lock(&pnp_lock);
128         list_add_tail(&dev->global_list, &pnp_global);
129         list_add_tail(&dev->protocol_list, &dev->protocol->devices);
130         spin_unlock(&pnp_lock);
131
132         ret = device_register(&dev->dev);
133         if (ret == 0)
134                 pnp_interface_attach_device(dev);
135         return ret;
136 }
137
138 /*
139  * pnp_add_device - adds a pnp device to the pnp layer
140  * @dev: pointer to dev to add
141  *
142  *  adds to driver model, name database, fixups, interface, etc.
143  */
144 int pnp_add_device(struct pnp_dev *dev)
145 {
146         if (!dev || !dev->protocol || dev->card)
147                 return -EINVAL;
148         dev->dev.parent = &dev->protocol->dev;
149         sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number,
150                 dev->number);
151         return __pnp_add_device(dev);
152 }
153
154 void __pnp_remove_device(struct pnp_dev *dev)
155 {
156         spin_lock(&pnp_lock);
157         list_del(&dev->global_list);
158         list_del(&dev->protocol_list);
159         spin_unlock(&pnp_lock);
160         device_unregister(&dev->dev);
161 }
162
163 static int __init pnp_init(void)
164 {
165         printk(KERN_INFO "Linux Plug and Play Support v0.97 (c) Adam Belay\n");
166         return bus_register(&pnp_bus_type);
167 }
168
169 subsys_initcall(pnp_init);