master/device.h
author Florian Pose <fp@igh-essen.com>
Thu, 02 Oct 2008 07:14:00 +0000
changeset 1243 13cb18b91627
parent 1209 8be462afb7f4
child 1326 ef907b0b5125
permissions -rw-r--r--
Added changes since 1.4.0-rc2.
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/******************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH
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 *
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 *  This file is part of the IgH EtherCAT Master.
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 *
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 *  The IgH EtherCAT Master is free software; you can redistribute it
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 *  and/or modify it under the terms of the GNU General Public License
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 *  as published by the Free Software Foundation; either version 2 of the
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 *  License, or (at your option) any later version.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be
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 *  useful, 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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 *  You should have received a copy of the GNU General Public License
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 *  along with the IgH EtherCAT Master; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 *  The right to use EtherCAT Technology is granted and comes free of
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 *  charge under condition of compatibility of product made by
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 *  Licensee. People intending to distribute/sell products based on the
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 *  code, have to sign an agreement to guarantee that products using
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 *  software based on IgH EtherCAT master stay compatible with the actual
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 *  EtherCAT specification (which are released themselves as an open
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 *  standard) as the (only) precondition to have the right to use EtherCAT
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 *  Technology, IP and trade marks.
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 *
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 *****************************************************************************/
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/**
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   \file
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   EtherCAT device structure.
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*/
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/*****************************************************************************/
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#ifndef __EC_DEVICE_H__
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#define __EC_DEVICE_H__
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#include <linux/interrupt.h>
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#include "../devices/ecdev.h"
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#include "globals.h"
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/**
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 * Size of the transmit ring.
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 * This memory ring is used to transmit frames. It is necessary to use
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 * different memory regions, because otherwise the network device DMA could
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 * send the same data twice, if it is called twice.
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 */
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#define EC_TX_RING_SIZE 2
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#ifdef EC_DEBUG_IF
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#include "debug.h"
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#endif
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#ifdef EC_DEBUG_RING
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#define EC_DEBUG_RING_SIZE 10
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typedef enum {
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    TX, RX
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} ec_debug_frame_dir_t;
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typedef struct {
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    ec_debug_frame_dir_t dir;
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    struct timeval t;
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    unsigned int addr;
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    uint8_t data[EC_MAX_DATA_SIZE];
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    unsigned int data_size;
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} ec_debug_frame_t;
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#endif
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/*****************************************************************************/
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/**
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   EtherCAT device.
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   An EtherCAT device is a network interface card, that is owned by an
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   EtherCAT master to send and receive EtherCAT frames with.
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*/
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struct ec_device
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{
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    ec_master_t *master; /**< EtherCAT master */
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    struct net_device *dev; /**< pointer to the assigned net_device */
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    ec_pollfunc_t poll; /**< pointer to the device's poll function */
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    struct module *module; /**< pointer to the device's owning module */
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    uint8_t open; /**< true, if the net_device has been opened */
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    uint8_t link_state; /**< device link state */
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    struct sk_buff *tx_skb[EC_TX_RING_SIZE]; /**< transmit skb ring */
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    unsigned int tx_ring_index; /**< last ring entry used to transmit */
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#ifdef EC_HAVE_CYCLES
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    cycles_t cycles_poll; /**< cycles of last poll */
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#endif
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#ifdef EC_DEBUG_RING
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    struct timeval timeval_poll;
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#endif
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    unsigned long jiffies_poll; /**< jiffies of last poll */
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    unsigned int tx_count; /**< number of frames sent */
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    unsigned int rx_count; /**< number of frames received */
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#ifdef EC_DEBUG_IF
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    ec_debug_t dbg; /**< debug device */
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#endif
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#ifdef EC_DEBUG_RING
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    ec_debug_frame_t debug_frames[EC_DEBUG_RING_SIZE];
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    unsigned int debug_frame_index;
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    unsigned int debug_frame_count;
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#endif
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};
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/*****************************************************************************/
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int ec_device_init(ec_device_t *, ec_master_t *);
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void ec_device_clear(ec_device_t *);
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void ec_device_attach(ec_device_t *, struct net_device *, ec_pollfunc_t,
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        struct module *);
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void ec_device_detach(ec_device_t *);
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int ec_device_open(ec_device_t *);
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int ec_device_close(ec_device_t *);
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void ec_device_poll(ec_device_t *);
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uint8_t *ec_device_tx_data(ec_device_t *);
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void ec_device_send(ec_device_t *, size_t);
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#ifdef EC_DEBUG_RING
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void ec_device_debug_ring_append(ec_device_t *, ec_debug_frame_dir_t,
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        const void *, size_t);
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void ec_device_debug_ring_print(const ec_device_t *);
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#endif
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/*****************************************************************************/
0
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#endif