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260586d2 DD |
1 | /* |
2 | * Support for rfkill through the OLPC XO-1 laptop embedded controller | |
3 | * | |
4 | * Copyright (C) 2010 One Laptop per Child | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/rfkill.h> | |
3bf9428f | 15 | #include <linux/olpc-ec.h> |
260586d2 | 16 | |
bc7ab495 DD |
17 | static bool card_blocked; |
18 | ||
260586d2 DD |
19 | static int rfkill_set_block(void *data, bool blocked) |
20 | { | |
21 | unsigned char cmd; | |
bc7ab495 DD |
22 | int r; |
23 | ||
24 | if (blocked == card_blocked) | |
25 | return 0; | |
26 | ||
260586d2 DD |
27 | if (blocked) |
28 | cmd = EC_WLAN_ENTER_RESET; | |
29 | else | |
30 | cmd = EC_WLAN_LEAVE_RESET; | |
31 | ||
bc7ab495 DD |
32 | r = olpc_ec_cmd(cmd, NULL, 0, NULL, 0); |
33 | if (r == 0) | |
34 | card_blocked = blocked; | |
35 | ||
36 | return r; | |
260586d2 DD |
37 | } |
38 | ||
39 | static const struct rfkill_ops rfkill_ops = { | |
40 | .set_block = rfkill_set_block, | |
41 | }; | |
42 | ||
b859f159 | 43 | static int xo1_rfkill_probe(struct platform_device *pdev) |
260586d2 DD |
44 | { |
45 | struct rfkill *rfk; | |
46 | int r; | |
47 | ||
48 | rfk = rfkill_alloc(pdev->name, &pdev->dev, RFKILL_TYPE_WLAN, | |
49 | &rfkill_ops, NULL); | |
50 | if (!rfk) | |
51 | return -ENOMEM; | |
52 | ||
53 | r = rfkill_register(rfk); | |
54 | if (r) { | |
55 | rfkill_destroy(rfk); | |
56 | return r; | |
57 | } | |
58 | ||
59 | platform_set_drvdata(pdev, rfk); | |
60 | return 0; | |
61 | } | |
62 | ||
b859f159 | 63 | static int xo1_rfkill_remove(struct platform_device *pdev) |
260586d2 DD |
64 | { |
65 | struct rfkill *rfk = platform_get_drvdata(pdev); | |
66 | rfkill_unregister(rfk); | |
67 | rfkill_destroy(rfk); | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static struct platform_driver xo1_rfkill_driver = { | |
72 | .driver = { | |
73 | .name = "xo1-rfkill", | |
260586d2 DD |
74 | }, |
75 | .probe = xo1_rfkill_probe, | |
b859f159 | 76 | .remove = xo1_rfkill_remove, |
260586d2 DD |
77 | }; |
78 | ||
73d99a22 | 79 | module_platform_driver(xo1_rfkill_driver); |
260586d2 DD |
80 | |
81 | MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>"); | |
82 | MODULE_LICENSE("GPL"); | |
83 | MODULE_ALIAS("platform:xo1-rfkill"); |