Commit | Line | Data |
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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> | |
12 | #include <linux/init.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/errno.h> | |
2e17c550 | 16 | #include <linux/dma-mapping.h> |
1da177e4 LT |
17 | |
18 | #include "base.h" | |
19 | ||
1da177e4 LT |
20 | static LIST_HEAD(pnp_protocols); |
21 | LIST_HEAD(pnp_global); | |
22 | DEFINE_SPINLOCK(pnp_lock); | |
23 | ||
8f81dd14 BH |
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 | ||
1da177e4 LT |
32 | void *pnp_alloc(long size) |
33 | { | |
34 | void *result; | |
35 | ||
dd00cc48 | 36 | result = kzalloc(size, GFP_KERNEL); |
9dd78466 | 37 | if (!result) { |
1da177e4 LT |
38 | printk(KERN_ERR "pnp: Out of Memory\n"); |
39 | return NULL; | |
40 | } | |
1da177e4 LT |
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 | */ | |
1da177e4 LT |
50 | int pnp_register_protocol(struct pnp_protocol *protocol) |
51 | { | |
52 | int nodenum; | |
9dd78466 | 53 | struct list_head *pos; |
1da177e4 | 54 | |
1da177e4 LT |
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 */ | |
9dd78466 BH |
61 | list_for_each(pos, &pnp_protocols) { |
62 | struct pnp_protocol *cur = to_pnp_protocol(pos); | |
63 | if (cur->number == nodenum) { | |
1da177e4 LT |
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 | |
1da177e4 LT |
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 | ||
1da177e4 LT |
89 | static void pnp_free_ids(struct pnp_dev *dev) |
90 | { | |
9dd78466 BH |
91 | struct pnp_id *id; |
92 | struct pnp_id *next; | |
07d4e9af | 93 | |
1da177e4 LT |
94 | id = dev->id; |
95 | while (id) { | |
96 | next = id->next; | |
97 | kfree(id); | |
98 | id = next; | |
99 | } | |
100 | } | |
101 | ||
aee3ad81 BH |
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 | ||
1da177e4 LT |
117 | static void pnp_release_device(struct device *dmdev) |
118 | { | |
9dd78466 | 119 | struct pnp_dev *dev = to_pnp_dev(dmdev); |
07d4e9af | 120 | |
1da177e4 | 121 | pnp_free_ids(dev); |
aee3ad81 | 122 | pnp_free_resources(dev); |
1f32ca31 | 123 | pnp_free_options(dev); |
1da177e4 LT |
124 | kfree(dev); |
125 | } | |
126 | ||
bda1e4e5 | 127 | struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id, char *pnpid) |
1da177e4 | 128 | { |
bda1e4e5 BH |
129 | struct pnp_dev *dev; |
130 | struct pnp_id *dev_id; | |
07d4e9af | 131 | |
bda1e4e5 BH |
132 | dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
133 | if (!dev) | |
134 | return NULL; | |
135 | ||
aee3ad81 | 136 | INIT_LIST_HEAD(&dev->resources); |
1f32ca31 | 137 | INIT_LIST_HEAD(&dev->options); |
bda1e4e5 BH |
138 | dev->protocol = protocol; |
139 | dev->number = id; | |
140 | dev->dma_mask = DMA_24BIT_MASK; | |
141 | ||
142 | dev->dev.parent = &dev->protocol->dev; | |
1da177e4 | 143 | dev->dev.bus = &pnp_bus_type; |
2e17c550 | 144 | dev->dev.dma_mask = &dev->dma_mask; |
bda1e4e5 | 145 | dev->dev.coherent_dma_mask = dev->dma_mask; |
1da177e4 | 146 | dev->dev.release = &pnp_release_device; |
bda1e4e5 BH |
147 | |
148 | sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number, | |
149 | dev->number); | |
150 | ||
151 | dev_id = pnp_add_id(dev, pnpid); | |
152 | if (!dev_id) { | |
153 | kfree(dev); | |
154 | return NULL; | |
155 | } | |
156 | ||
157 | return dev; | |
158 | } | |
159 | ||
160 | int __pnp_add_device(struct pnp_dev *dev) | |
161 | { | |
bda1e4e5 | 162 | pnp_fixup_device(dev); |
1da177e4 LT |
163 | dev->status = PNP_READY; |
164 | spin_lock(&pnp_lock); | |
165 | list_add_tail(&dev->global_list, &pnp_global); | |
166 | list_add_tail(&dev->protocol_list, &dev->protocol->devices); | |
167 | spin_unlock(&pnp_lock); | |
8a89efd1 | 168 | return device_register(&dev->dev); |
1da177e4 LT |
169 | } |
170 | ||
171 | /* | |
172 | * pnp_add_device - adds a pnp device to the pnp layer | |
173 | * @dev: pointer to dev to add | |
174 | * | |
175 | * adds to driver model, name database, fixups, interface, etc. | |
176 | */ | |
1da177e4 LT |
177 | int pnp_add_device(struct pnp_dev *dev) |
178 | { | |
348366b9 | 179 | int ret; |
2663f60d BH |
180 | char buf[128]; |
181 | int len = 0; | |
182 | struct pnp_id *id; | |
348366b9 | 183 | |
b1734913 | 184 | if (dev->card) |
1da177e4 | 185 | return -EINVAL; |
348366b9 | 186 | |
348366b9 BH |
187 | ret = __pnp_add_device(dev); |
188 | if (ret) | |
189 | return ret; | |
190 | ||
2663f60d BH |
191 | buf[0] = '\0'; |
192 | for (id = dev->id; id; id = id->next) | |
193 | len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id); | |
348366b9 | 194 | |
2f53432c | 195 | pnp_dbg(&dev->dev, "%s device, IDs%s (%s)\n", |
2663f60d | 196 | dev->protocol->name, buf, dev->active ? "active" : "disabled"); |
348366b9 | 197 | return 0; |
1da177e4 LT |
198 | } |
199 | ||
200 | void __pnp_remove_device(struct pnp_dev *dev) | |
201 | { | |
202 | spin_lock(&pnp_lock); | |
203 | list_del(&dev->global_list); | |
204 | list_del(&dev->protocol_list); | |
205 | spin_unlock(&pnp_lock); | |
206 | device_unregister(&dev->dev); | |
207 | } | |
208 | ||
1da177e4 LT |
209 | static int __init pnp_init(void) |
210 | { | |
1da177e4 LT |
211 | return bus_register(&pnp_bus_type); |
212 | } | |
213 | ||
214 | subsys_initcall(pnp_init); | |
97ef062b BH |
215 | |
216 | int pnp_debug; | |
217 | ||
218 | #if defined(CONFIG_PNP_DEBUG_MESSAGES) | |
219 | static int __init pnp_debug_setup(char *__unused) | |
220 | { | |
221 | pnp_debug = 1; | |
222 | return 1; | |
223 | } | |
224 | __setup("pnp.debug", pnp_debug_setup); | |
225 | #endif |