PNP: log PNP resources, as we do for PCI
[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         dev_set_name(&protocol->dev, "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 void pnp_free_resource(struct pnp_resource *pnp_res)
103 {
104         list_del(&pnp_res->list);
105         kfree(pnp_res);
106 }
107
108 void pnp_free_resources(struct pnp_dev *dev)
109 {
110         struct pnp_resource *pnp_res, *tmp;
111
112         list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
113                 pnp_free_resource(pnp_res);
114         }
115 }
116
117 static void pnp_release_device(struct device *dmdev)
118 {
119         struct pnp_dev *dev = to_pnp_dev(dmdev);
120
121         pnp_free_ids(dev);
122         pnp_free_resources(dev);
123         pnp_free_options(dev);
124         kfree(dev);
125 }
126
127 struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id, char *pnpid)
128 {
129         struct pnp_dev *dev;
130         struct pnp_id *dev_id;
131
132         dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
133         if (!dev)
134                 return NULL;
135
136         INIT_LIST_HEAD(&dev->resources);
137         INIT_LIST_HEAD(&dev->options);
138         dev->protocol = protocol;
139         dev->number = id;
140         dev->dma_mask = DMA_BIT_MASK(24);
141
142         dev->dev.parent = &dev->protocol->dev;
143         dev->dev.bus = &pnp_bus_type;
144         dev->dev.dma_mask = &dev->dma_mask;
145         dev->dev.coherent_dma_mask = dev->dma_mask;
146         dev->dev.release = &pnp_release_device;
147
148         dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);
149
150         dev_id = pnp_add_id(dev, pnpid);
151         if (!dev_id) {
152                 kfree(dev);
153                 return NULL;
154         }
155
156         return dev;
157 }
158
159 int __pnp_add_device(struct pnp_dev *dev)
160 {
161         pnp_fixup_device(dev);
162         dev->status = PNP_READY;
163         spin_lock(&pnp_lock);
164         list_add_tail(&dev->global_list, &pnp_global);
165         list_add_tail(&dev->protocol_list, &dev->protocol->devices);
166         spin_unlock(&pnp_lock);
167         if (dev->protocol->can_wakeup)
168                 device_set_wakeup_capable(&dev->dev,
169                                 dev->protocol->can_wakeup(dev));
170         return device_register(&dev->dev);
171 }
172
173 /*
174  * pnp_add_device - adds a pnp device to the pnp layer
175  * @dev: pointer to dev to add
176  *
177  *  adds to driver model, name database, fixups, interface, etc.
178  */
179 int pnp_add_device(struct pnp_dev *dev)
180 {
181         int ret;
182         char buf[128];
183         int len = 0;
184         struct pnp_id *id;
185
186         if (dev->card)
187                 return -EINVAL;
188
189         ret = __pnp_add_device(dev);
190         if (ret)
191                 return ret;
192
193         buf[0] = '\0';
194         for (id = dev->id; id; id = id->next)
195                 len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);
196
197         dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs%s (%s)\n",
198                    dev->protocol->name, buf,
199                    dev->active ? "active" : "disabled");
200         return 0;
201 }
202
203 void __pnp_remove_device(struct pnp_dev *dev)
204 {
205         spin_lock(&pnp_lock);
206         list_del(&dev->global_list);
207         list_del(&dev->protocol_list);
208         spin_unlock(&pnp_lock);
209         device_unregister(&dev->dev);
210 }
211
212 static int __init pnp_init(void)
213 {
214         return bus_register(&pnp_bus_type);
215 }
216
217 subsys_initcall(pnp_init);
218
219 int pnp_debug;
220
221 #if defined(CONFIG_PNP_DEBUG_MESSAGES)
222 static int __init pnp_debug_setup(char *__unused)
223 {
224         pnp_debug = 1;
225         return 1;
226 }
227 __setup("pnp.debug", pnp_debug_setup);
228 #endif