ieee802154: introduce sysfs file

This patch moves the sysfs handling in a own file. This is like wireless
sysfs file handling.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/net/ieee802154/sysfs.c b/net/ieee802154/sysfs.c
new file mode 100644
index 000000000000..eb9ca6f99122
--- /dev/null
+++ b/net/ieee802154/sysfs.c
@@ -0,0 +1,94 @@
+/* This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Authors:
+ * Alexander Aring <aar@pengutronix.de>
+ *
+ * Based on: net/wireless/sysfs.c
+ */
+
+#include <linux/device.h>
+
+#include <net/cfg802154.h>
+
+#define MASTER_SHOW_COMPLEX(name, format_string, args...)		\
+static ssize_t name ## _show(struct device *dev,			\
+			    struct device_attribute *attr, char *buf)	\
+{									\
+	struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev);	\
+	int ret;							\
+									\
+	mutex_lock(&phy->pib_lock);					\
+	ret = snprintf(buf, PAGE_SIZE, format_string "\n", args);	\
+	mutex_unlock(&phy->pib_lock);					\
+	return ret;							\
+}									\
+static DEVICE_ATTR_RO(name)
+
+#define MASTER_SHOW(field, format_string)				\
+	MASTER_SHOW_COMPLEX(field, format_string, phy->field)
+
+MASTER_SHOW(current_channel, "%d");
+MASTER_SHOW(current_page, "%d");
+MASTER_SHOW(transmit_power, "%d +- 1 dB");
+MASTER_SHOW(cca_mode, "%d");
+
+static ssize_t channels_supported_show(struct device *dev,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev);
+	int ret;
+	int i, len = 0;
+
+	mutex_lock(&phy->pib_lock);
+	for (i = 0; i < 32; i++) {
+		ret = snprintf(buf + len, PAGE_SIZE - len,
+			       "%#09x\n", phy->channels_supported[i]);
+		if (ret < 0)
+			break;
+		len += ret;
+	}
+	mutex_unlock(&phy->pib_lock);
+	return len;
+}
+static DEVICE_ATTR_RO(channels_supported);
+
+static void wpan_phy_release(struct device *d)
+{
+	struct wpan_phy *phy = container_of(d, struct wpan_phy, dev);
+
+	kfree(phy);
+}
+
+static struct attribute *pmib_attrs[] = {
+	&dev_attr_current_channel.attr,
+	&dev_attr_current_page.attr,
+	&dev_attr_channels_supported.attr,
+	&dev_attr_transmit_power.attr,
+	&dev_attr_cca_mode.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(pmib);
+
+struct class wpan_phy_class = {
+	.name = "ieee802154",
+	.dev_release = wpan_phy_release,
+	.dev_groups = pmib_groups,
+};
+
+int wpan_phy_sysfs_init(void)
+{
+	return class_register(&wpan_phy_class);
+}
+
+void wpan_phy_sysfs_exit(void)
+{
+	class_unregister(&wpan_phy_class);
+}