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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> | |
15 | ||
16 | #include <asm/olpc.h> | |
17 | ||
18 | static int rfkill_set_block(void *data, bool blocked) | |
19 | { | |
20 | unsigned char cmd; | |
21 | if (blocked) | |
22 | cmd = EC_WLAN_ENTER_RESET; | |
23 | else | |
24 | cmd = EC_WLAN_LEAVE_RESET; | |
25 | ||
26 | return olpc_ec_cmd(cmd, NULL, 0, NULL, 0); | |
27 | } | |
28 | ||
29 | static const struct rfkill_ops rfkill_ops = { | |
30 | .set_block = rfkill_set_block, | |
31 | }; | |
32 | ||
33 | static int __devinit xo1_rfkill_probe(struct platform_device *pdev) | |
34 | { | |
35 | struct rfkill *rfk; | |
36 | int r; | |
37 | ||
38 | rfk = rfkill_alloc(pdev->name, &pdev->dev, RFKILL_TYPE_WLAN, | |
39 | &rfkill_ops, NULL); | |
40 | if (!rfk) | |
41 | return -ENOMEM; | |
42 | ||
43 | r = rfkill_register(rfk); | |
44 | if (r) { | |
45 | rfkill_destroy(rfk); | |
46 | return r; | |
47 | } | |
48 | ||
49 | platform_set_drvdata(pdev, rfk); | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static int __devexit xo1_rfkill_remove(struct platform_device *pdev) | |
54 | { | |
55 | struct rfkill *rfk = platform_get_drvdata(pdev); | |
56 | rfkill_unregister(rfk); | |
57 | rfkill_destroy(rfk); | |
58 | return 0; | |
59 | } | |
60 | ||
61 | static struct platform_driver xo1_rfkill_driver = { | |
62 | .driver = { | |
63 | .name = "xo1-rfkill", | |
64 | .owner = THIS_MODULE, | |
65 | }, | |
66 | .probe = xo1_rfkill_probe, | |
67 | .remove = __devexit_p(xo1_rfkill_remove), | |
68 | }; | |
69 | ||
73d99a22 | 70 | module_platform_driver(xo1_rfkill_driver); |
260586d2 DD |
71 | |
72 | MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>"); | |
73 | MODULE_LICENSE("GPL"); | |
74 | MODULE_ALIAS("platform:xo1-rfkill"); |