1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/w1/w1_netlink.h b/drivers/w1/w1_netlink.h
new file mode 100644
index 000000000..449680a61
--- /dev/null
+++ b/drivers/w1/w1_netlink.h
@@ -0,0 +1,135 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2003 Evgeniy Polyakov <zbr@ioremap.net>
+ */
+
+#ifndef __W1_NETLINK_H
+#define __W1_NETLINK_H
+
+#include <asm/types.h>
+#include <linux/connector.h>
+
+#include "w1_internal.h"
+
+/**
+ * enum w1_cn_msg_flags - bitfield flags for struct cn_msg.flags
+ *
+ * @W1_CN_BUNDLE: Request bundling replies into fewer messagse.  Be prepared
+ * to handle multiple struct cn_msg, struct w1_netlink_msg, and
+ * struct w1_netlink_cmd in one packet.
+ */
+enum w1_cn_msg_flags {
+	W1_CN_BUNDLE = 1,
+};
+
+/**
+ * enum w1_netlink_message_types - message type
+ *
+ * @W1_SLAVE_ADD: notification that a slave device was added
+ * @W1_SLAVE_REMOVE: notification that a slave device was removed
+ * @W1_MASTER_ADD: notification that a new bus master was added
+ * @W1_MASTER_REMOVE: notification that a bus masterwas removed
+ * @W1_MASTER_CMD: initiate operations on a specific master
+ * @W1_SLAVE_CMD: sends reset, selects the slave, then does a read/write/touch
+ * operation
+ * @W1_LIST_MASTERS: used to determine the bus master identifiers
+ */
+enum w1_netlink_message_types {
+	W1_SLAVE_ADD = 0,
+	W1_SLAVE_REMOVE,
+	W1_MASTER_ADD,
+	W1_MASTER_REMOVE,
+	W1_MASTER_CMD,
+	W1_SLAVE_CMD,
+	W1_LIST_MASTERS,
+};
+
+/**
+ * struct w1_netlink_msg - holds w1 message type, id, and result
+ *
+ * @type: one of enum w1_netlink_message_types
+ * @status: kernel feedback for success 0 or errno failure value
+ * @len: length of data following w1_netlink_msg
+ * @id: union holding bus master id (msg.id) and slave device id (id[8]).
+ * @id.id: Slave ID (8 bytes)
+ * @id.mst: bus master identification
+ * @id.mst.id: bus master ID
+ * @id.mst.res: bus master reserved
+ * @data: start address of any following data
+ *
+ * The base message structure for w1 messages over netlink.
+ * The netlink connector data sequence is, struct nlmsghdr, struct cn_msg,
+ * then one or more struct w1_netlink_msg (each with optional data).
+ */
+struct w1_netlink_msg
+{
+	__u8				type;
+	__u8				status;
+	__u16				len;
+	union {
+		__u8			id[8];
+		struct w1_mst {
+			__u32		id;
+			__u32		res;
+		} mst;
+	} id;
+	__u8				data[];
+};
+
+/**
+ * enum w1_commands - commands available for master or slave operations
+ *
+ * @W1_CMD_READ: read len bytes
+ * @W1_CMD_WRITE: write len bytes
+ * @W1_CMD_SEARCH: initiate a standard search, returns only the slave
+ * devices found during that search
+ * @W1_CMD_ALARM_SEARCH: search for devices that are currently alarming
+ * @W1_CMD_TOUCH: Touches a series of bytes.
+ * @W1_CMD_RESET: sends a bus reset on the given master
+ * @W1_CMD_SLAVE_ADD: adds a slave to the given master,
+ * 8 byte slave id at data[0]
+ * @W1_CMD_SLAVE_REMOVE: removes a slave to the given master,
+ * 8 byte slave id at data[0]
+ * @W1_CMD_LIST_SLAVES: list of slaves registered on this master
+ * @W1_CMD_MAX: number of available commands
+ */
+enum w1_commands {
+	W1_CMD_READ = 0,
+	W1_CMD_WRITE,
+	W1_CMD_SEARCH,
+	W1_CMD_ALARM_SEARCH,
+	W1_CMD_TOUCH,
+	W1_CMD_RESET,
+	W1_CMD_SLAVE_ADD,
+	W1_CMD_SLAVE_REMOVE,
+	W1_CMD_LIST_SLAVES,
+	W1_CMD_MAX
+};
+
+/**
+ * struct w1_netlink_cmd - holds the command and data
+ *
+ * @cmd: one of enum w1_commands
+ * @res: reserved
+ * @len: length of data following w1_netlink_cmd
+ * @data: start address of any following data
+ *
+ * One or more struct w1_netlink_cmd is placed starting at w1_netlink_msg.data
+ * each with optional data.
+ */
+struct w1_netlink_cmd
+{
+	__u8				cmd;
+	__u8				res;
+	__u16				len;
+	__u8				data[];
+};
+
+#ifdef __KERNEL__
+
+void w1_netlink_send(struct w1_master *, struct w1_netlink_msg *);
+int w1_init_netlink(void);
+void w1_fini_netlink(void);
+
+#endif /* __KERNEL__ */
+#endif /* __W1_NETLINK_H */