linux/drivers/net/can/sja1000/sja1000.c

/*
 * sja1000.c -  Philips SJA1000 network device driver
 *
 * Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
 * 38106 Braunschweig, GERMANY
 *
 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Volkswagen nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * Alternatively, provided that this notice is retained in full, this
 * software may be distributed under the terms of the GNU General
 * Public License ("GPL") version 2, in which case the provisions of the
 * GPL apply INSTEAD OF those given above.
 *
 * The provided data structures and external interfaces from this code
 * are not restricted to be used by modules with a GPL compatible license.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/delay.h>

#include <linux/can/dev.h>
#include <linux/can/error.h>

#include "sja1000.h"

#define DRV_NAME …

MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;

static const struct can_bittiming_const sja1000_bittiming_const = …;

static void sja1000_write_cmdreg(struct sja1000_priv *priv, u8 val)
{ … }

static int sja1000_is_absent(struct sja1000_priv *priv)
{ … }

static int sja1000_probe_chip(struct net_device *dev)
{ … }

static void set_reset_mode(struct net_device *dev)
{ … }

static void set_normal_mode(struct net_device *dev)
{ … }

/*
 * initialize SJA1000 chip:
 *   - reset chip
 *   - set output mode
 *   - set baudrate
 *   - enable interrupts
 *   - start operating mode
 */
static void chipset_init(struct net_device *dev)
{ … }

static void sja1000_start(struct net_device *dev)
{ … }

static int sja1000_set_mode(struct net_device *dev, enum can_mode mode)
{ … }

static int sja1000_set_bittiming(struct net_device *dev)
{ … }

static int sja1000_get_berr_counter(const struct net_device *dev,
				    struct can_berr_counter *bec)
{ … }

/*
 * transmit a CAN message
 * message layout in the sk_buff should be like this:
 * xx xx xx xx	 ff	 ll   00 11 22 33 44 55 66 77
 * [  can-id ] [flags] [len] [can data (up to 8 bytes]
 */
static netdev_tx_t sja1000_start_xmit(struct sk_buff *skb,
					    struct net_device *dev)
{ … }

static void sja1000_rx(struct net_device *dev)
{ … }

static irqreturn_t sja1000_reset_interrupt(int irq, void *dev_id)
{ … }

static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
{ … }

irqreturn_t sja1000_interrupt(int irq, void *dev_id)
{ … }
EXPORT_SYMBOL_GPL(…);

static int sja1000_open(struct net_device *dev)
{ … }

static int sja1000_close(struct net_device *dev)
{ … }

struct net_device *alloc_sja1000dev(int sizeof_priv)
{ … }
EXPORT_SYMBOL_GPL(…);

void free_sja1000dev(struct net_device *dev)
{ … }
EXPORT_SYMBOL_GPL(…);

static const struct net_device_ops sja1000_netdev_ops = …;

static const struct ethtool_ops sja1000_ethtool_ops = …;

int register_sja1000dev(struct net_device *dev)
{ … }
EXPORT_SYMBOL_GPL(…);

void unregister_sja1000dev(struct net_device *dev)
{ … }
EXPORT_SYMBOL_GPL(…);

static __init int sja1000_init(void)
{ … }

module_init(…) …;

static __exit void sja1000_exit(void)
{ … }

module_exit(sja1000_exit);