Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / platform / x86 / xo1-rfkill.c

diff --git a/kernel/drivers/platform/x86/xo1-rfkill.c b/kernel/drivers/platform/x86/xo1-rfkill.c
new file mode 100644 (file)
index 0000000..e46fa9c
--- /dev/null
+++ b/kernel/drivers/platform/x86/xo1-rfkill.c
@@ -0,0 +1,83 @@
+/*
+ * Support for rfkill through the OLPC XO-1 laptop embedded controller
+ *
+ * Copyright (C) 2010 One Laptop per Child
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#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 int xo1_rfkill_remove(struct platform_device *pdev)
+{
+       struct rfkill *rfk = platform_get_drvdata(pdev);
+       rfkill_unregister(rfk);
+       rfkill_destroy(rfk);
+       return 0;
+}
+
+static struct platform_driver xo1_rfkill_driver = {
+       .driver = {
+               .name = "xo1-rfkill",
+       },
+       .probe          = xo1_rfkill_probe,
+       .remove         = xo1_rfkill_remove,
+};
+
+module_platform_driver(xo1_rfkill_driver);
+
+MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:xo1-rfkill");