1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Support for rfkill through the OLPC XO-1 laptop embedded controller
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2010 One Laptop per Child
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/platform_device.h>
10*4882a593Smuzhiyun #include <linux/rfkill.h>
11*4882a593Smuzhiyun #include <linux/olpc-ec.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun static bool card_blocked;
14*4882a593Smuzhiyun
rfkill_set_block(void * data,bool blocked)15*4882a593Smuzhiyun static int rfkill_set_block(void *data, bool blocked)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun unsigned char cmd;
18*4882a593Smuzhiyun int r;
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun if (blocked == card_blocked)
21*4882a593Smuzhiyun return 0;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun if (blocked)
24*4882a593Smuzhiyun cmd = EC_WLAN_ENTER_RESET;
25*4882a593Smuzhiyun else
26*4882a593Smuzhiyun cmd = EC_WLAN_LEAVE_RESET;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun r = olpc_ec_cmd(cmd, NULL, 0, NULL, 0);
29*4882a593Smuzhiyun if (r == 0)
30*4882a593Smuzhiyun card_blocked = blocked;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return r;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun static const struct rfkill_ops rfkill_ops = {
36*4882a593Smuzhiyun .set_block = rfkill_set_block,
37*4882a593Smuzhiyun };
38*4882a593Smuzhiyun
xo1_rfkill_probe(struct platform_device * pdev)39*4882a593Smuzhiyun static int xo1_rfkill_probe(struct platform_device *pdev)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun struct rfkill *rfk;
42*4882a593Smuzhiyun int r;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun rfk = rfkill_alloc(pdev->name, &pdev->dev, RFKILL_TYPE_WLAN,
45*4882a593Smuzhiyun &rfkill_ops, NULL);
46*4882a593Smuzhiyun if (!rfk)
47*4882a593Smuzhiyun return -ENOMEM;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun r = rfkill_register(rfk);
50*4882a593Smuzhiyun if (r) {
51*4882a593Smuzhiyun rfkill_destroy(rfk);
52*4882a593Smuzhiyun return r;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun platform_set_drvdata(pdev, rfk);
56*4882a593Smuzhiyun return 0;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
xo1_rfkill_remove(struct platform_device * pdev)59*4882a593Smuzhiyun static int xo1_rfkill_remove(struct platform_device *pdev)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun struct rfkill *rfk = platform_get_drvdata(pdev);
62*4882a593Smuzhiyun rfkill_unregister(rfk);
63*4882a593Smuzhiyun rfkill_destroy(rfk);
64*4882a593Smuzhiyun return 0;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun static struct platform_driver xo1_rfkill_driver = {
68*4882a593Smuzhiyun .driver = {
69*4882a593Smuzhiyun .name = "xo1-rfkill",
70*4882a593Smuzhiyun },
71*4882a593Smuzhiyun .probe = xo1_rfkill_probe,
72*4882a593Smuzhiyun .remove = xo1_rfkill_remove,
73*4882a593Smuzhiyun };
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun module_platform_driver(xo1_rfkill_driver);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");
78*4882a593Smuzhiyun MODULE_LICENSE("GPL");
79*4882a593Smuzhiyun MODULE_ALIAS("platform:xo1-rfkill");
80