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![Oliver Hartkopp](/assets/img/avatar_default.png)
In commita6d190f8c7
("can: skb: drop tx skb if in listen only mode") the priv->ctrlmode element is read even on virtual CAN interfaces that do not create the struct can_priv at startup. This out-of-bounds read may lead to CAN frame drops for virtual CAN interfaces like vcan and vxcan. This patch mainly reverts the original commit and adds a new helper for CAN interface drivers that provide the required information in struct can_priv. Fixes:a6d190f8c7
("can: skb: drop tx skb if in listen only mode") Reported-by: Dariusz Stojaczyk <Dariusz.Stojaczyk@opensynergy.com> Cc: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Cc: Max Staudt <max@enpas.org> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Link: https://lore.kernel.org/all/20221102095431.36831-1-socketcan@hartkopp.net Cc: stable@vger.kernel.org # 6.0.x [mkl: patch pch_can, too] Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
699 lines
18 KiB
C
699 lines
18 KiB
C
/*
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* sja1000.c - Philips SJA1000 network device driver
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*
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* Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
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* 38106 Braunschweig, GERMANY
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*
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* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Volkswagen nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* Alternatively, provided that this notice is retained in full, this
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* software may be distributed under the terms of the GNU General
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* Public License ("GPL") version 2, in which case the provisions of the
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* GPL apply INSTEAD OF those given above.
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*
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* The provided data structures and external interfaces from this code
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* are not restricted to be used by modules with a GPL compatible license.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/ptrace.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/ethtool.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/delay.h>
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#include <linux/can/dev.h>
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#include <linux/can/error.h>
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#include "sja1000.h"
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#define DRV_NAME "sja1000"
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MODULE_AUTHOR("Oliver Hartkopp <oliver.hartkopp@volkswagen.de>");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION(DRV_NAME "CAN netdevice driver");
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static const struct can_bittiming_const sja1000_bittiming_const = {
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.name = DRV_NAME,
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.tseg1_min = 1,
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.tseg1_max = 16,
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.tseg2_min = 1,
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.tseg2_max = 8,
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.sjw_max = 4,
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.brp_min = 1,
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.brp_max = 64,
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.brp_inc = 1,
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};
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static void sja1000_write_cmdreg(struct sja1000_priv *priv, u8 val)
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{
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unsigned long flags;
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/*
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* The command register needs some locking and time to settle
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* the write_reg() operation - especially on SMP systems.
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*/
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spin_lock_irqsave(&priv->cmdreg_lock, flags);
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priv->write_reg(priv, SJA1000_CMR, val);
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priv->read_reg(priv, SJA1000_SR);
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spin_unlock_irqrestore(&priv->cmdreg_lock, flags);
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}
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static int sja1000_is_absent(struct sja1000_priv *priv)
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{
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return (priv->read_reg(priv, SJA1000_MOD) == 0xFF);
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}
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static int sja1000_probe_chip(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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if (priv->reg_base && sja1000_is_absent(priv)) {
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netdev_err(dev, "probing failed\n");
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return 0;
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}
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return -1;
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}
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static void set_reset_mode(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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unsigned char status = priv->read_reg(priv, SJA1000_MOD);
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int i;
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/* disable interrupts */
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priv->write_reg(priv, SJA1000_IER, IRQ_OFF);
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for (i = 0; i < 100; i++) {
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/* check reset bit */
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if (status & MOD_RM) {
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priv->can.state = CAN_STATE_STOPPED;
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return;
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}
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/* reset chip */
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priv->write_reg(priv, SJA1000_MOD, MOD_RM);
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udelay(10);
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status = priv->read_reg(priv, SJA1000_MOD);
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}
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netdev_err(dev, "setting SJA1000 into reset mode failed!\n");
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}
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static void set_normal_mode(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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unsigned char status = priv->read_reg(priv, SJA1000_MOD);
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u8 mod_reg_val = 0x00;
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int i;
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for (i = 0; i < 100; i++) {
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/* check reset bit */
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if ((status & MOD_RM) == 0) {
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priv->can.state = CAN_STATE_ERROR_ACTIVE;
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/* enable interrupts */
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if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
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priv->write_reg(priv, SJA1000_IER, IRQ_ALL);
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else
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priv->write_reg(priv, SJA1000_IER,
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IRQ_ALL & ~IRQ_BEI);
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return;
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}
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/* set chip to normal mode */
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if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
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mod_reg_val |= MOD_LOM;
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if (priv->can.ctrlmode & CAN_CTRLMODE_PRESUME_ACK)
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mod_reg_val |= MOD_STM;
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priv->write_reg(priv, SJA1000_MOD, mod_reg_val);
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udelay(10);
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status = priv->read_reg(priv, SJA1000_MOD);
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}
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netdev_err(dev, "setting SJA1000 into normal mode failed!\n");
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}
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/*
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* initialize SJA1000 chip:
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* - reset chip
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* - set output mode
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* - set baudrate
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* - enable interrupts
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* - start operating mode
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*/
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static void chipset_init(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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if (!(priv->flags & SJA1000_QUIRK_NO_CDR_REG))
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/* set clock divider and output control register */
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priv->write_reg(priv, SJA1000_CDR, priv->cdr | CDR_PELICAN);
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/* set acceptance filter (accept all) */
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priv->write_reg(priv, SJA1000_ACCC0, 0x00);
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priv->write_reg(priv, SJA1000_ACCC1, 0x00);
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priv->write_reg(priv, SJA1000_ACCC2, 0x00);
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priv->write_reg(priv, SJA1000_ACCC3, 0x00);
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priv->write_reg(priv, SJA1000_ACCM0, 0xFF);
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priv->write_reg(priv, SJA1000_ACCM1, 0xFF);
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priv->write_reg(priv, SJA1000_ACCM2, 0xFF);
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priv->write_reg(priv, SJA1000_ACCM3, 0xFF);
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priv->write_reg(priv, SJA1000_OCR, priv->ocr | OCR_MODE_NORMAL);
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}
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static void sja1000_start(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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/* leave reset mode */
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if (priv->can.state != CAN_STATE_STOPPED)
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set_reset_mode(dev);
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/* Initialize chip if uninitialized at this stage */
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if (!(priv->flags & SJA1000_QUIRK_NO_CDR_REG ||
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priv->read_reg(priv, SJA1000_CDR) & CDR_PELICAN))
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chipset_init(dev);
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/* Clear error counters and error code capture */
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priv->write_reg(priv, SJA1000_TXERR, 0x0);
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priv->write_reg(priv, SJA1000_RXERR, 0x0);
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priv->read_reg(priv, SJA1000_ECC);
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/* clear interrupt flags */
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priv->read_reg(priv, SJA1000_IR);
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/* leave reset mode */
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set_normal_mode(dev);
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}
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static int sja1000_set_mode(struct net_device *dev, enum can_mode mode)
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{
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switch (mode) {
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case CAN_MODE_START:
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sja1000_start(dev);
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if (netif_queue_stopped(dev))
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netif_wake_queue(dev);
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break;
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default:
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static int sja1000_set_bittiming(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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struct can_bittiming *bt = &priv->can.bittiming;
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u8 btr0, btr1;
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btr0 = ((bt->brp - 1) & 0x3f) | (((bt->sjw - 1) & 0x3) << 6);
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btr1 = ((bt->prop_seg + bt->phase_seg1 - 1) & 0xf) |
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(((bt->phase_seg2 - 1) & 0x7) << 4);
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if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
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btr1 |= 0x80;
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netdev_info(dev, "setting BTR0=0x%02x BTR1=0x%02x\n", btr0, btr1);
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priv->write_reg(priv, SJA1000_BTR0, btr0);
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priv->write_reg(priv, SJA1000_BTR1, btr1);
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return 0;
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}
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static int sja1000_get_berr_counter(const struct net_device *dev,
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struct can_berr_counter *bec)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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bec->txerr = priv->read_reg(priv, SJA1000_TXERR);
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bec->rxerr = priv->read_reg(priv, SJA1000_RXERR);
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return 0;
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}
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/*
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* transmit a CAN message
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* message layout in the sk_buff should be like this:
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* xx xx xx xx ff ll 00 11 22 33 44 55 66 77
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* [ can-id ] [flags] [len] [can data (up to 8 bytes]
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*/
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static netdev_tx_t sja1000_start_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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struct can_frame *cf = (struct can_frame *)skb->data;
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uint8_t fi;
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canid_t id;
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uint8_t dreg;
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u8 cmd_reg_val = 0x00;
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int i;
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if (can_dev_dropped_skb(dev, skb))
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return NETDEV_TX_OK;
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netif_stop_queue(dev);
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fi = can_get_cc_dlc(cf, priv->can.ctrlmode);
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id = cf->can_id;
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if (id & CAN_RTR_FLAG)
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fi |= SJA1000_FI_RTR;
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if (id & CAN_EFF_FLAG) {
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fi |= SJA1000_FI_FF;
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dreg = SJA1000_EFF_BUF;
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priv->write_reg(priv, SJA1000_FI, fi);
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priv->write_reg(priv, SJA1000_ID1, (id & 0x1fe00000) >> 21);
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priv->write_reg(priv, SJA1000_ID2, (id & 0x001fe000) >> 13);
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priv->write_reg(priv, SJA1000_ID3, (id & 0x00001fe0) >> 5);
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priv->write_reg(priv, SJA1000_ID4, (id & 0x0000001f) << 3);
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} else {
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dreg = SJA1000_SFF_BUF;
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priv->write_reg(priv, SJA1000_FI, fi);
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priv->write_reg(priv, SJA1000_ID1, (id & 0x000007f8) >> 3);
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priv->write_reg(priv, SJA1000_ID2, (id & 0x00000007) << 5);
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}
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for (i = 0; i < cf->len; i++)
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priv->write_reg(priv, dreg++, cf->data[i]);
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can_put_echo_skb(skb, dev, 0, 0);
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if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
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cmd_reg_val |= CMD_AT;
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if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)
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cmd_reg_val |= CMD_SRR;
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else
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cmd_reg_val |= CMD_TR;
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sja1000_write_cmdreg(priv, cmd_reg_val);
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return NETDEV_TX_OK;
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}
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static void sja1000_rx(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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struct net_device_stats *stats = &dev->stats;
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struct can_frame *cf;
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struct sk_buff *skb;
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uint8_t fi;
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uint8_t dreg;
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canid_t id;
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int i;
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/* create zero'ed CAN frame buffer */
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skb = alloc_can_skb(dev, &cf);
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if (skb == NULL)
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return;
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fi = priv->read_reg(priv, SJA1000_FI);
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if (fi & SJA1000_FI_FF) {
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/* extended frame format (EFF) */
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dreg = SJA1000_EFF_BUF;
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id = (priv->read_reg(priv, SJA1000_ID1) << 21)
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| (priv->read_reg(priv, SJA1000_ID2) << 13)
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| (priv->read_reg(priv, SJA1000_ID3) << 5)
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| (priv->read_reg(priv, SJA1000_ID4) >> 3);
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id |= CAN_EFF_FLAG;
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} else {
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/* standard frame format (SFF) */
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dreg = SJA1000_SFF_BUF;
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id = (priv->read_reg(priv, SJA1000_ID1) << 3)
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| (priv->read_reg(priv, SJA1000_ID2) >> 5);
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}
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can_frame_set_cc_len(cf, fi & 0x0F, priv->can.ctrlmode);
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if (fi & SJA1000_FI_RTR) {
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id |= CAN_RTR_FLAG;
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} else {
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for (i = 0; i < cf->len; i++)
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cf->data[i] = priv->read_reg(priv, dreg++);
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stats->rx_bytes += cf->len;
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}
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stats->rx_packets++;
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cf->can_id = id;
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/* release receive buffer */
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sja1000_write_cmdreg(priv, CMD_RRB);
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netif_rx(skb);
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}
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static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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struct net_device_stats *stats = &dev->stats;
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struct can_frame *cf;
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struct sk_buff *skb;
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enum can_state state = priv->can.state;
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enum can_state rx_state, tx_state;
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unsigned int rxerr, txerr;
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uint8_t ecc, alc;
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skb = alloc_can_err_skb(dev, &cf);
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if (skb == NULL)
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return -ENOMEM;
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txerr = priv->read_reg(priv, SJA1000_TXERR);
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rxerr = priv->read_reg(priv, SJA1000_RXERR);
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if (isrc & IRQ_DOI) {
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/* data overrun interrupt */
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netdev_dbg(dev, "data overrun interrupt\n");
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cf->can_id |= CAN_ERR_CRTL;
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cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
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stats->rx_over_errors++;
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stats->rx_errors++;
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sja1000_write_cmdreg(priv, CMD_CDO); /* clear bit */
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}
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if (isrc & IRQ_EI) {
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/* error warning interrupt */
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netdev_dbg(dev, "error warning interrupt\n");
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if (status & SR_BS)
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state = CAN_STATE_BUS_OFF;
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else if (status & SR_ES)
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state = CAN_STATE_ERROR_WARNING;
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else
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state = CAN_STATE_ERROR_ACTIVE;
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}
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if (state != CAN_STATE_BUS_OFF) {
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cf->can_id |= CAN_ERR_CNT;
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cf->data[6] = txerr;
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cf->data[7] = rxerr;
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}
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if (isrc & IRQ_BEI) {
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/* bus error interrupt */
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priv->can.can_stats.bus_error++;
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stats->rx_errors++;
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ecc = priv->read_reg(priv, SJA1000_ECC);
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cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
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/* set error type */
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switch (ecc & ECC_MASK) {
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case ECC_BIT:
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cf->data[2] |= CAN_ERR_PROT_BIT;
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break;
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case ECC_FORM:
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cf->data[2] |= CAN_ERR_PROT_FORM;
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break;
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case ECC_STUFF:
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cf->data[2] |= CAN_ERR_PROT_STUFF;
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break;
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default:
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break;
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}
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/* set error location */
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cf->data[3] = ecc & ECC_SEG;
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/* Error occurred during transmission? */
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if ((ecc & ECC_DIR) == 0)
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cf->data[2] |= CAN_ERR_PROT_TX;
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}
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if (isrc & IRQ_EPI) {
|
|
/* error passive interrupt */
|
|
netdev_dbg(dev, "error passive interrupt\n");
|
|
|
|
if (state == CAN_STATE_ERROR_PASSIVE)
|
|
state = CAN_STATE_ERROR_WARNING;
|
|
else
|
|
state = CAN_STATE_ERROR_PASSIVE;
|
|
}
|
|
if (isrc & IRQ_ALI) {
|
|
/* arbitration lost interrupt */
|
|
netdev_dbg(dev, "arbitration lost interrupt\n");
|
|
alc = priv->read_reg(priv, SJA1000_ALC);
|
|
priv->can.can_stats.arbitration_lost++;
|
|
cf->can_id |= CAN_ERR_LOSTARB;
|
|
cf->data[0] = alc & 0x1f;
|
|
}
|
|
|
|
if (state != priv->can.state) {
|
|
tx_state = txerr >= rxerr ? state : 0;
|
|
rx_state = txerr <= rxerr ? state : 0;
|
|
|
|
can_change_state(dev, cf, tx_state, rx_state);
|
|
|
|
if(state == CAN_STATE_BUS_OFF)
|
|
can_bus_off(dev);
|
|
}
|
|
|
|
netif_rx(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
irqreturn_t sja1000_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = (struct net_device *)dev_id;
|
|
struct sja1000_priv *priv = netdev_priv(dev);
|
|
struct net_device_stats *stats = &dev->stats;
|
|
uint8_t isrc, status;
|
|
int n = 0;
|
|
|
|
if (priv->pre_irq)
|
|
priv->pre_irq(priv);
|
|
|
|
/* Shared interrupts and IRQ off? */
|
|
if (priv->read_reg(priv, SJA1000_IER) == IRQ_OFF)
|
|
goto out;
|
|
|
|
while ((isrc = priv->read_reg(priv, SJA1000_IR)) &&
|
|
(n < SJA1000_MAX_IRQ)) {
|
|
|
|
status = priv->read_reg(priv, SJA1000_SR);
|
|
/* check for absent controller due to hw unplug */
|
|
if (status == 0xFF && sja1000_is_absent(priv))
|
|
goto out;
|
|
|
|
if (isrc & IRQ_WUI)
|
|
netdev_warn(dev, "wakeup interrupt\n");
|
|
|
|
if (isrc & IRQ_TI) {
|
|
/* transmission buffer released */
|
|
if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT &&
|
|
!(status & SR_TCS)) {
|
|
stats->tx_errors++;
|
|
can_free_echo_skb(dev, 0, NULL);
|
|
} else {
|
|
/* transmission complete */
|
|
stats->tx_bytes += can_get_echo_skb(dev, 0, NULL);
|
|
stats->tx_packets++;
|
|
}
|
|
netif_wake_queue(dev);
|
|
}
|
|
if (isrc & IRQ_RI) {
|
|
/* receive interrupt */
|
|
while (status & SR_RBS) {
|
|
sja1000_rx(dev);
|
|
status = priv->read_reg(priv, SJA1000_SR);
|
|
/* check for absent controller */
|
|
if (status == 0xFF && sja1000_is_absent(priv))
|
|
goto out;
|
|
}
|
|
}
|
|
if (isrc & (IRQ_DOI | IRQ_EI | IRQ_BEI | IRQ_EPI | IRQ_ALI)) {
|
|
/* error interrupt */
|
|
if (sja1000_err(dev, isrc, status))
|
|
break;
|
|
}
|
|
n++;
|
|
}
|
|
out:
|
|
if (priv->post_irq)
|
|
priv->post_irq(priv);
|
|
|
|
if (n >= SJA1000_MAX_IRQ)
|
|
netdev_dbg(dev, "%d messages handled in ISR", n);
|
|
|
|
return (n) ? IRQ_HANDLED : IRQ_NONE;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sja1000_interrupt);
|
|
|
|
static int sja1000_open(struct net_device *dev)
|
|
{
|
|
struct sja1000_priv *priv = netdev_priv(dev);
|
|
int err;
|
|
|
|
/* set chip into reset mode */
|
|
set_reset_mode(dev);
|
|
|
|
/* common open */
|
|
err = open_candev(dev);
|
|
if (err)
|
|
return err;
|
|
|
|
/* register interrupt handler, if not done by the device driver */
|
|
if (!(priv->flags & SJA1000_CUSTOM_IRQ_HANDLER)) {
|
|
err = request_irq(dev->irq, sja1000_interrupt, priv->irq_flags,
|
|
dev->name, (void *)dev);
|
|
if (err) {
|
|
close_candev(dev);
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
|
|
/* init and start chi */
|
|
sja1000_start(dev);
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sja1000_close(struct net_device *dev)
|
|
{
|
|
struct sja1000_priv *priv = netdev_priv(dev);
|
|
|
|
netif_stop_queue(dev);
|
|
set_reset_mode(dev);
|
|
|
|
if (!(priv->flags & SJA1000_CUSTOM_IRQ_HANDLER))
|
|
free_irq(dev->irq, (void *)dev);
|
|
|
|
close_candev(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct net_device *alloc_sja1000dev(int sizeof_priv)
|
|
{
|
|
struct net_device *dev;
|
|
struct sja1000_priv *priv;
|
|
|
|
dev = alloc_candev(sizeof(struct sja1000_priv) + sizeof_priv,
|
|
SJA1000_ECHO_SKB_MAX);
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
priv = netdev_priv(dev);
|
|
|
|
priv->dev = dev;
|
|
priv->can.bittiming_const = &sja1000_bittiming_const;
|
|
priv->can.do_set_bittiming = sja1000_set_bittiming;
|
|
priv->can.do_set_mode = sja1000_set_mode;
|
|
priv->can.do_get_berr_counter = sja1000_get_berr_counter;
|
|
priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
|
|
CAN_CTRLMODE_LISTENONLY |
|
|
CAN_CTRLMODE_3_SAMPLES |
|
|
CAN_CTRLMODE_ONE_SHOT |
|
|
CAN_CTRLMODE_BERR_REPORTING |
|
|
CAN_CTRLMODE_PRESUME_ACK |
|
|
CAN_CTRLMODE_CC_LEN8_DLC;
|
|
|
|
spin_lock_init(&priv->cmdreg_lock);
|
|
|
|
if (sizeof_priv)
|
|
priv->priv = (void *)priv + sizeof(struct sja1000_priv);
|
|
|
|
return dev;
|
|
}
|
|
EXPORT_SYMBOL_GPL(alloc_sja1000dev);
|
|
|
|
void free_sja1000dev(struct net_device *dev)
|
|
{
|
|
free_candev(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(free_sja1000dev);
|
|
|
|
static const struct net_device_ops sja1000_netdev_ops = {
|
|
.ndo_open = sja1000_open,
|
|
.ndo_stop = sja1000_close,
|
|
.ndo_start_xmit = sja1000_start_xmit,
|
|
.ndo_change_mtu = can_change_mtu,
|
|
};
|
|
|
|
static const struct ethtool_ops sja1000_ethtool_ops = {
|
|
.get_ts_info = ethtool_op_get_ts_info,
|
|
};
|
|
|
|
int register_sja1000dev(struct net_device *dev)
|
|
{
|
|
if (!sja1000_probe_chip(dev))
|
|
return -ENODEV;
|
|
|
|
dev->flags |= IFF_ECHO; /* we support local echo */
|
|
dev->netdev_ops = &sja1000_netdev_ops;
|
|
dev->ethtool_ops = &sja1000_ethtool_ops;
|
|
|
|
set_reset_mode(dev);
|
|
chipset_init(dev);
|
|
|
|
return register_candev(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_sja1000dev);
|
|
|
|
void unregister_sja1000dev(struct net_device *dev)
|
|
{
|
|
set_reset_mode(dev);
|
|
unregister_candev(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_sja1000dev);
|
|
|
|
static __init int sja1000_init(void)
|
|
{
|
|
printk(KERN_INFO "%s CAN netdevice driver\n", DRV_NAME);
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init(sja1000_init);
|
|
|
|
static __exit void sja1000_exit(void)
|
|
{
|
|
printk(KERN_INFO "%s: driver removed\n", DRV_NAME);
|
|
}
|
|
|
|
module_exit(sja1000_exit);
|