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path: root/drivers/platform/x86/xo1-rfkill.c
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Diffstat (limited to 'drivers/platform/x86/xo1-rfkill.c')
-rw-r--r--drivers/platform/x86/xo1-rfkill.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/platform/x86/xo1-rfkill.c b/drivers/platform/x86/xo1-rfkill.c
new file mode 100644
index 000000000..e46fa9ceb
--- /dev/null
+++ b/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");