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183b9b59 IPG |
1 | /* |
2 | * UWB PAL support. | |
3 | * | |
4 | * Copyright (C) 2008 Cambridge Silicon Radio Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version | |
8 | * 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/uwb.h> | |
20 | ||
21 | #include "uwb-internal.h" | |
22 | ||
23 | /** | |
24 | * uwb_pal_init - initialize a UWB PAL | |
25 | * @pal: the PAL to initialize | |
26 | */ | |
27 | void uwb_pal_init(struct uwb_pal *pal) | |
28 | { | |
29 | INIT_LIST_HEAD(&pal->node); | |
30 | } | |
31 | EXPORT_SYMBOL_GPL(uwb_pal_init); | |
32 | ||
33 | /** | |
34 | * uwb_pal_register - register a UWB PAL | |
183b9b59 IPG |
35 | * @pal: the PAL |
36 | * | |
37 | * The PAL must be initialized with uwb_pal_init(). | |
38 | */ | |
6fae35f9 | 39 | int uwb_pal_register(struct uwb_pal *pal) |
183b9b59 | 40 | { |
6fae35f9 | 41 | struct uwb_rc *rc = pal->rc; |
b60066c1 DV |
42 | int ret; |
43 | ||
44 | if (pal->device) { | |
45 | ret = sysfs_create_link(&pal->device->kobj, | |
46 | &rc->uwb_dev.dev.kobj, "uwb_rc"); | |
47 | if (ret < 0) | |
48 | return ret; | |
49 | ret = sysfs_create_link(&rc->uwb_dev.dev.kobj, | |
50 | &pal->device->kobj, pal->name); | |
51 | if (ret < 0) { | |
52 | sysfs_remove_link(&pal->device->kobj, "uwb_rc"); | |
53 | return ret; | |
54 | } | |
55 | } | |
56 | ||
6fae35f9 | 57 | mutex_lock(&rc->uwb_dev.mutex); |
183b9b59 | 58 | list_add(&pal->node, &rc->pals); |
6fae35f9 | 59 | mutex_unlock(&rc->uwb_dev.mutex); |
183b9b59 IPG |
60 | |
61 | return 0; | |
62 | } | |
63 | EXPORT_SYMBOL_GPL(uwb_pal_register); | |
64 | ||
65 | /** | |
66 | * uwb_pal_register - unregister a UWB PAL | |
183b9b59 IPG |
67 | * @pal: the PAL |
68 | */ | |
6fae35f9 | 69 | void uwb_pal_unregister(struct uwb_pal *pal) |
183b9b59 | 70 | { |
6fae35f9 DV |
71 | struct uwb_rc *rc = pal->rc; |
72 | ||
73 | uwb_radio_stop(pal); | |
74 | ||
75 | mutex_lock(&rc->uwb_dev.mutex); | |
183b9b59 | 76 | list_del(&pal->node); |
6fae35f9 | 77 | mutex_unlock(&rc->uwb_dev.mutex); |
b60066c1 DV |
78 | |
79 | if (pal->device) { | |
80 | sysfs_remove_link(&rc->uwb_dev.dev.kobj, pal->name); | |
81 | sysfs_remove_link(&pal->device->kobj, "uwb_rc"); | |
82 | } | |
183b9b59 IPG |
83 | } |
84 | EXPORT_SYMBOL_GPL(uwb_pal_unregister); | |
85 | ||
86 | /** | |
87 | * uwb_rc_pal_init - initialize the PAL related parts of a radio controller | |
88 | * @rc: the radio controller | |
89 | */ | |
90 | void uwb_rc_pal_init(struct uwb_rc *rc) | |
91 | { | |
183b9b59 IPG |
92 | INIT_LIST_HEAD(&rc->pals); |
93 | } |