8a0934bf9b
Remove filename from file, this is not done anymore as it doesn't add anything and usually is incorrect as filename change often. Also shorten the GPL to the more common address-less version and remove excess white-space. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/*
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* Copyright (c) 2003 Evgeniy Polyakov <zbr@ioremap.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __W1_NETLINK_H
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#define __W1_NETLINK_H
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#include <asm/types.h>
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#include <linux/connector.h>
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#include "w1.h"
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/**
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* enum w1_cn_msg_flags - bitfield flags for struct cn_msg.flags
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*
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* @W1_CN_BUNDLE: Request bundling replies into fewer messagse. Be prepared
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* to handle multiple struct cn_msg, struct w1_netlink_msg, and
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* struct w1_netlink_cmd in one packet.
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*/
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enum w1_cn_msg_flags {
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W1_CN_BUNDLE = 1,
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};
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/**
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* enum w1_netlink_message_types - message type
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*
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* @W1_SLAVE_ADD: notification that a slave device was added
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* @W1_SLAVE_REMOVE: notification that a slave device was removed
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* @W1_MASTER_ADD: notification that a new bus master was added
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* @W1_MASTER_REMOVE: notification that a bus masterwas removed
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* @W1_MASTER_CMD: initiate operations on a specific master
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* @W1_SLAVE_CMD: sends reset, selects the slave, then does a read/write/touch
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* operation
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* @W1_LIST_MASTERS: used to determine the bus master identifiers
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*/
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enum w1_netlink_message_types {
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W1_SLAVE_ADD = 0,
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W1_SLAVE_REMOVE,
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W1_MASTER_ADD,
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W1_MASTER_REMOVE,
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W1_MASTER_CMD,
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W1_SLAVE_CMD,
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W1_LIST_MASTERS,
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};
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/**
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* struct w1_netlink_msg - holds w1 message type, id, and result
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*
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* @type: one of enum w1_netlink_message_types
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* @status: kernel feedback for success 0 or errno failure value
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* @len: length of data following w1_netlink_msg
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* @id: union holding master bus id (msg.id) and slave device id (id[8]).
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* @data: start address of any following data
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*
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* The base message structure for w1 messages over netlink.
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* The netlink connector data sequence is, struct nlmsghdr, struct cn_msg,
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* then one or more struct w1_netlink_msg (each with optional data).
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*/
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struct w1_netlink_msg
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{
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__u8 type;
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__u8 status;
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__u16 len;
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union {
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__u8 id[8];
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struct w1_mst {
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__u32 id;
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__u32 res;
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} mst;
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} id;
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__u8 data[0];
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};
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/**
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* enum w1_commands - commands available for master or slave operations
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*
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* @W1_CMD_READ: read len bytes
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* @W1_CMD_WRITE: write len bytes
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* @W1_CMD_SEARCH: initiate a standard search, returns only the slave
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* devices found during that search
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* @W1_CMD_ALARM_SEARCH: search for devices that are currently alarming
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* @W1_CMD_TOUCH: Touches a series of bytes.
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* @W1_CMD_RESET: sends a bus reset on the given master
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* @W1_CMD_SLAVE_ADD: adds a slave to the given master,
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* 8 byte slave id at data[0]
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* @W1_CMD_SLAVE_REMOVE: removes a slave to the given master,
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* 8 byte slave id at data[0]
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* @W1_CMD_LIST_SLAVES: list of slaves registered on this master
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* @W1_CMD_MAX: number of available commands
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*/
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enum w1_commands {
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W1_CMD_READ = 0,
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W1_CMD_WRITE,
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W1_CMD_SEARCH,
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W1_CMD_ALARM_SEARCH,
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W1_CMD_TOUCH,
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W1_CMD_RESET,
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W1_CMD_SLAVE_ADD,
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W1_CMD_SLAVE_REMOVE,
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W1_CMD_LIST_SLAVES,
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W1_CMD_MAX
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};
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/**
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* struct w1_netlink_cmd - holds the command and data
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*
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* @cmd: one of enum w1_commands
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* @res: reserved
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* @len: length of data following w1_netlink_cmd
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* @data: start address of any following data
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*
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* One or more struct w1_netlink_cmd is placed starting at w1_netlink_msg.data
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* each with optional data.
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*/
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struct w1_netlink_cmd
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{
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__u8 cmd;
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__u8 res;
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__u16 len;
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__u8 data[0];
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};
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#ifdef __KERNEL__
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void w1_netlink_send(struct w1_master *, struct w1_netlink_msg *);
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int w1_init_netlink(void);
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void w1_fini_netlink(void);
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#endif /* __KERNEL__ */
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#endif /* __W1_NETLINK_H */
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