Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * core.c - contains all core device and protocol registration functions | |
3 | * | |
4 | * Copyright 2002 Adam Belay <ambx1@neo.rr.com> | |
1da177e4 LT |
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> | |
38f6b38d | 12 | #include <linux/mutex.h> |
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/string.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/errno.h> | |
2e17c550 | 17 | #include <linux/dma-mapping.h> |
1da177e4 LT |
18 | |
19 | #include "base.h" | |
20 | ||
1da177e4 LT |
21 | static LIST_HEAD(pnp_protocols); |
22 | LIST_HEAD(pnp_global); | |
38f6b38d | 23 | DEFINE_MUTEX(pnp_lock); |
1da177e4 | 24 | |
8f81dd14 BH |
25 | /* |
26 | * ACPI or PNPBIOS should tell us about all platform devices, so we can | |
27 | * skip some blind probes. ISAPNP typically enumerates only plug-in ISA | |
28 | * devices, not built-in things like COM ports. | |
29 | */ | |
30 | int pnp_platform_devices; | |
31 | EXPORT_SYMBOL(pnp_platform_devices); | |
32 | ||
1da177e4 LT |
33 | void *pnp_alloc(long size) |
34 | { | |
35 | void *result; | |
36 | ||
dd00cc48 | 37 | result = kzalloc(size, GFP_KERNEL); |
9dd78466 | 38 | if (!result) { |
1da177e4 LT |
39 | printk(KERN_ERR "pnp: Out of Memory\n"); |
40 | return NULL; | |
41 | } | |
1da177e4 LT |
42 | return result; |
43 | } | |
44 | ||
45 | /** | |
46 | * pnp_protocol_register - adds a pnp protocol to the pnp layer | |
47 | * @protocol: pointer to the corresponding pnp_protocol structure | |
48 | * | |
49 | * Ex protocols: ISAPNP, PNPBIOS, etc | |
50 | */ | |
1da177e4 LT |
51 | int pnp_register_protocol(struct pnp_protocol *protocol) |
52 | { | |
53 | int nodenum; | |
9dd78466 | 54 | struct list_head *pos; |
1da177e4 | 55 | |
1da177e4 LT |
56 | INIT_LIST_HEAD(&protocol->devices); |
57 | INIT_LIST_HEAD(&protocol->cards); | |
58 | nodenum = 0; | |
38f6b38d | 59 | mutex_lock(&pnp_lock); |
1da177e4 LT |
60 | |
61 | /* assign the lowest unused number */ | |
9dd78466 BH |
62 | list_for_each(pos, &pnp_protocols) { |
63 | struct pnp_protocol *cur = to_pnp_protocol(pos); | |
64 | if (cur->number == nodenum) { | |
1da177e4 LT |
65 | pos = &pnp_protocols; |
66 | nodenum++; | |
67 | } | |
68 | } | |
69 | ||
70 | list_add_tail(&protocol->protocol_list, &pnp_protocols); | |
38f6b38d | 71 | mutex_unlock(&pnp_lock); |
1da177e4 LT |
72 | |
73 | protocol->number = nodenum; | |
c85e37c5 | 74 | dev_set_name(&protocol->dev, "pnp%d", nodenum); |
1da177e4 LT |
75 | return device_register(&protocol->dev); |
76 | } | |
77 | ||
78 | /** | |
79 | * pnp_protocol_unregister - removes a pnp protocol from the pnp layer | |
80 | * @protocol: pointer to the corresponding pnp_protocol structure | |
1da177e4 LT |
81 | */ |
82 | void pnp_unregister_protocol(struct pnp_protocol *protocol) | |
83 | { | |
38f6b38d | 84 | mutex_lock(&pnp_lock); |
1da177e4 | 85 | list_del(&protocol->protocol_list); |
38f6b38d | 86 | mutex_unlock(&pnp_lock); |
1da177e4 LT |
87 | device_unregister(&protocol->dev); |
88 | } | |
89 | ||
1da177e4 LT |
90 | static void pnp_free_ids(struct pnp_dev *dev) |
91 | { | |
9dd78466 BH |
92 | struct pnp_id *id; |
93 | struct pnp_id *next; | |
07d4e9af | 94 | |
1da177e4 LT |
95 | id = dev->id; |
96 | while (id) { | |
97 | next = id->next; | |
98 | kfree(id); | |
99 | id = next; | |
100 | } | |
101 | } | |
102 | ||
aee3ad81 BH |
103 | void pnp_free_resource(struct pnp_resource *pnp_res) |
104 | { | |
105 | list_del(&pnp_res->list); | |
106 | kfree(pnp_res); | |
107 | } | |
108 | ||
109 | void pnp_free_resources(struct pnp_dev *dev) | |
110 | { | |
111 | struct pnp_resource *pnp_res, *tmp; | |
112 | ||
113 | list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) { | |
114 | pnp_free_resource(pnp_res); | |
115 | } | |
116 | } | |
117 | ||
1da177e4 LT |
118 | static void pnp_release_device(struct device *dmdev) |
119 | { | |
9dd78466 | 120 | struct pnp_dev *dev = to_pnp_dev(dmdev); |
07d4e9af | 121 | |
1da177e4 | 122 | pnp_free_ids(dev); |
aee3ad81 | 123 | pnp_free_resources(dev); |
1f32ca31 | 124 | pnp_free_options(dev); |
1da177e4 LT |
125 | kfree(dev); |
126 | } | |
127 | ||
620e112c TR |
128 | struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id, |
129 | const char *pnpid) | |
1da177e4 | 130 | { |
bda1e4e5 BH |
131 | struct pnp_dev *dev; |
132 | struct pnp_id *dev_id; | |
07d4e9af | 133 | |
bda1e4e5 BH |
134 | dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
135 | if (!dev) | |
136 | return NULL; | |
137 | ||
aee3ad81 | 138 | INIT_LIST_HEAD(&dev->resources); |
1f32ca31 | 139 | INIT_LIST_HEAD(&dev->options); |
bda1e4e5 BH |
140 | dev->protocol = protocol; |
141 | dev->number = id; | |
2f4f27d4 | 142 | dev->dma_mask = DMA_BIT_MASK(24); |
bda1e4e5 BH |
143 | |
144 | dev->dev.parent = &dev->protocol->dev; | |
1da177e4 | 145 | dev->dev.bus = &pnp_bus_type; |
2e17c550 | 146 | dev->dev.dma_mask = &dev->dma_mask; |
bda1e4e5 | 147 | dev->dev.coherent_dma_mask = dev->dma_mask; |
1da177e4 | 148 | dev->dev.release = &pnp_release_device; |
bda1e4e5 | 149 | |
c85e37c5 | 150 | dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number); |
bda1e4e5 BH |
151 | |
152 | dev_id = pnp_add_id(dev, pnpid); | |
153 | if (!dev_id) { | |
154 | kfree(dev); | |
155 | return NULL; | |
156 | } | |
157 | ||
158 | return dev; | |
159 | } | |
160 | ||
161 | int __pnp_add_device(struct pnp_dev *dev) | |
162 | { | |
bda1e4e5 | 163 | pnp_fixup_device(dev); |
1da177e4 | 164 | dev->status = PNP_READY; |
38f6b38d | 165 | mutex_lock(&pnp_lock); |
1da177e4 LT |
166 | list_add_tail(&dev->global_list, &pnp_global); |
167 | list_add_tail(&dev->protocol_list, &dev->protocol->devices); | |
38f6b38d | 168 | mutex_unlock(&pnp_lock); |
b14e033e AS |
169 | if (dev->protocol->can_wakeup) |
170 | device_set_wakeup_capable(&dev->dev, | |
171 | dev->protocol->can_wakeup(dev)); | |
8a89efd1 | 172 | return device_register(&dev->dev); |
1da177e4 LT |
173 | } |
174 | ||
175 | /* | |
176 | * pnp_add_device - adds a pnp device to the pnp layer | |
177 | * @dev: pointer to dev to add | |
178 | * | |
179 | * adds to driver model, name database, fixups, interface, etc. | |
180 | */ | |
1da177e4 LT |
181 | int pnp_add_device(struct pnp_dev *dev) |
182 | { | |
348366b9 | 183 | int ret; |
2663f60d BH |
184 | char buf[128]; |
185 | int len = 0; | |
186 | struct pnp_id *id; | |
348366b9 | 187 | |
b1734913 | 188 | if (dev->card) |
1da177e4 | 189 | return -EINVAL; |
348366b9 | 190 | |
348366b9 BH |
191 | ret = __pnp_add_device(dev); |
192 | if (ret) | |
193 | return ret; | |
194 | ||
2663f60d BH |
195 | buf[0] = '\0'; |
196 | for (id = dev->id; id; id = id->next) | |
197 | len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id); | |
348366b9 | 198 | |
c1f3f281 BH |
199 | dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs%s (%s)\n", |
200 | dev->protocol->name, buf, | |
201 | dev->active ? "active" : "disabled"); | |
348366b9 | 202 | return 0; |
1da177e4 LT |
203 | } |
204 | ||
205 | void __pnp_remove_device(struct pnp_dev *dev) | |
206 | { | |
38f6b38d | 207 | mutex_lock(&pnp_lock); |
1da177e4 LT |
208 | list_del(&dev->global_list); |
209 | list_del(&dev->protocol_list); | |
38f6b38d | 210 | mutex_unlock(&pnp_lock); |
1da177e4 LT |
211 | device_unregister(&dev->dev); |
212 | } | |
213 | ||
1da177e4 LT |
214 | static int __init pnp_init(void) |
215 | { | |
1da177e4 LT |
216 | return bus_register(&pnp_bus_type); |
217 | } | |
218 | ||
219 | subsys_initcall(pnp_init); | |
97ef062b BH |
220 | |
221 | int pnp_debug; | |
222 | ||
223 | #if defined(CONFIG_PNP_DEBUG_MESSAGES) | |
cdefba03 | 224 | module_param_named(debug, pnp_debug, int, 0644); |
97ef062b | 225 | #endif |