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
rfkill_set_block(void * data,bool blocked)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
xo1_rfkill_probe(struct platform_device * pdev)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
xo1_rfkill_remove(struct platform_device * pdev)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
xo1_rfkill_init(void)70 static int __init xo1_rfkill_init(void)
71 {
72 return platform_driver_register(&xo1_rfkill_driver);
73 }
74
xo1_rfkill_exit(void)75 static void __exit xo1_rfkill_exit(void)
76 {
77 platform_driver_unregister(&xo1_rfkill_driver);
78 }
79
80 MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");
81 MODULE_LICENSE("GPL");
82 MODULE_ALIAS("platform:xo1-rfkill");
83
84 module_init(xo1_rfkill_init);
85 module_exit(xo1_rfkill_exit);
86