2 * core.c - contains all core device and protocol registration functions
4 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
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>
20 static LIST_HEAD(pnp_protocols
);
21 LIST_HEAD(pnp_global
);
22 DEFINE_SPINLOCK(pnp_lock
);
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.
29 int pnp_platform_devices
;
30 EXPORT_SYMBOL(pnp_platform_devices
);
32 void *pnp_alloc(long size
)
36 result
= kzalloc(size
, GFP_KERNEL
);
38 printk(KERN_ERR
"pnp: Out of Memory\n");
45 * pnp_protocol_register - adds a pnp protocol to the pnp layer
46 * @protocol: pointer to the corresponding pnp_protocol structure
48 * Ex protocols: ISAPNP, PNPBIOS, etc
50 int pnp_register_protocol(struct pnp_protocol
*protocol
)
53 struct list_head
*pos
;
55 INIT_LIST_HEAD(&protocol
->devices
);
56 INIT_LIST_HEAD(&protocol
->cards
);
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
) {
69 list_add_tail(&protocol
->protocol_list
, &pnp_protocols
);
70 spin_unlock(&pnp_lock
);
72 protocol
->number
= nodenum
;
73 dev_set_name(&protocol
->dev
, "pnp%d", nodenum
);
74 return device_register(&protocol
->dev
);
78 * pnp_protocol_unregister - removes a pnp protocol from the pnp layer
79 * @protocol: pointer to the corresponding pnp_protocol structure
81 void pnp_unregister_protocol(struct pnp_protocol
*protocol
)
84 list_del(&protocol
->protocol_list
);
85 spin_unlock(&pnp_lock
);
86 device_unregister(&protocol
->dev
);
89 static void pnp_free_ids(struct pnp_dev
*dev
)
102 void pnp_free_resource(struct pnp_resource
*pnp_res
)
104 list_del(&pnp_res
->list
);
108 void pnp_free_resources(struct pnp_dev
*dev
)
110 struct pnp_resource
*pnp_res
, *tmp
;
112 list_for_each_entry_safe(pnp_res
, tmp
, &dev
->resources
, list
) {
113 pnp_free_resource(pnp_res
);
117 static void pnp_release_device(struct device
*dmdev
)
119 struct pnp_dev
*dev
= to_pnp_dev(dmdev
);
122 pnp_free_resources(dev
);
123 pnp_free_options(dev
);
127 struct pnp_dev
*pnp_alloc_dev(struct pnp_protocol
*protocol
, int id
, char *pnpid
)
130 struct pnp_id
*dev_id
;
132 dev
= kzalloc(sizeof(struct pnp_dev
), GFP_KERNEL
);
136 INIT_LIST_HEAD(&dev
->resources
);
137 INIT_LIST_HEAD(&dev
->options
);
138 dev
->protocol
= protocol
;
140 dev
->dma_mask
= DMA_BIT_MASK(24);
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
;
148 dev_set_name(&dev
->dev
, "%02x:%02x", dev
->protocol
->number
, dev
->number
);
150 dev_id
= pnp_add_id(dev
, pnpid
);
159 int __pnp_add_device(struct pnp_dev
*dev
)
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 return device_register(&dev
->dev
);
171 * pnp_add_device - adds a pnp device to the pnp layer
172 * @dev: pointer to dev to add
174 * adds to driver model, name database, fixups, interface, etc.
176 int pnp_add_device(struct pnp_dev
*dev
)
186 ret
= __pnp_add_device(dev
);
191 for (id
= dev
->id
; id
; id
= id
->next
)
192 len
+= scnprintf(buf
+ len
, sizeof(buf
) - len
, " %s", id
->id
);
194 pnp_dbg(&dev
->dev
, "%s device, IDs%s (%s)\n",
195 dev
->protocol
->name
, buf
, dev
->active
? "active" : "disabled");
199 void __pnp_remove_device(struct pnp_dev
*dev
)
201 spin_lock(&pnp_lock
);
202 list_del(&dev
->global_list
);
203 list_del(&dev
->protocol_list
);
204 spin_unlock(&pnp_lock
);
205 device_unregister(&dev
->dev
);
208 static int __init
pnp_init(void)
210 return bus_register(&pnp_bus_type
);
213 subsys_initcall(pnp_init
);
217 #if defined(CONFIG_PNP_DEBUG_MESSAGES)
218 static int __init
pnp_debug_setup(char *__unused
)
223 __setup("pnp.debug", pnp_debug_setup
);
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