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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Support for rfkill through the OLPC XO-1 laptop embedded controller
*
* Copyright (C) 2010 One Laptop per Child
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
#include <linux/olpc-ec.h>
static bool card_blocked;
static int rfkill_set_block(void *data, bool blocked)
{
unsigned char cmd;
int r;
if (blocked == card_blocked)
return 0;
if (blocked)
cmd = EC_WLAN_ENTER_RESET;
else
cmd = EC_WLAN_LEAVE_RESET;
r = olpc_ec_cmd(cmd, NULL, 0, NULL, 0);
if (r == 0)
card_blocked = blocked;
return r;
}
static const struct rfkill_ops rfkill_ops = {
.set_block = rfkill_set_block,
};
static int xo1_rfkill_probe(struct platform_device *pdev)
{
struct rfkill *rfk;
int r;
rfk = rfkill_alloc(pdev->name, &pdev->dev, RFKILL_TYPE_WLAN,
&rfkill_ops, NULL);
if (!rfk)
return -ENOMEM;
r = rfkill_register(rfk);
if (r) {
rfkill_destroy(rfk);
return r;
}
platform_set_drvdata(pdev, rfk);
return 0;
}
static void xo1_rfkill_remove(struct platform_device *pdev)
{
struct rfkill *rfk = platform_get_drvdata(pdev);
rfkill_unregister(rfk);
rfkill_destroy(rfk);
}
static struct platform_driver xo1_rfkill_driver = {
.driver = {
.name = "xo1-rfkill",
},
.probe = xo1_rfkill_probe,
.remove_new = xo1_rfkill_remove,
};
module_platform_driver(xo1_rfkill_driver);
MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");
MODULE_DESCRIPTION("OLPC XO-1 software RF kill switch");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:xo1-rfkill");
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