can: Revert outdated cc770 driver patches.

Newer versions have been floating about, and I applied
to older variant unfortunately.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 895 deletions

diff --git a/drivers/net/can/cc770/cc770.c b/drivers/net/can/cc770/cc770.c
deleted file mode 100644
index 81dc8306218b..000000000000
--- a/drivers/net/can/cc770/cc770.c
+++ /dev/null
@@ -1,895 +0,0 @@
-/*
- * cc770.c - Bosch CC770 and Intel AN82527 network device driver
- *
- * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg@grandegger.com>
- *
- * Derived from the old Socket-CAN i82527 driver:
- *
- * 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.
- *
- * Send feedback to <socketcan-users@lists.berlios.de>
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/version.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/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/skbuff.h>
-#include <linux/delay.h>
-
-#include <linux/can.h>
-#include <linux/can/dev.h>
-#include <linux/can/error.h>
-#include <linux/can/dev.h>
-
-#include "cc770.h"
-
-#define DRV_NAME  "cc770"
-
-MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION(DRV_NAME "CAN netdevice driver");
-
-/*
- * The CC770 is a CAN controller from Bosch, which is 100% compatible
- * with the AN82527 from Intel, but with "bugs" being fixed and some
- * additional functionality, mainly:
- *
- * 1. RX and TX error counters are readable.
- * 2. Support of silent (listen-only) mode.
- * 3. Message object 15 can receive all types of frames, also RTR and EFF.
- *
- * Details are available from Bosch's "CC770_Product_Info_2007-01.pdf",
- * which explains in detail the compatibility between the CC770 and the
- * 82527. This driver use the additional functionality 3. on real CC770
- * devices. Unfortunately, the CC770 does still not store the message
- * identifier of received remote transmission request frames and
- * therefore it's set to 0.
- *
- * The message objects 1..14 can be used for TX and RX while the message
- * objects 15 is optimized for RX. It has a shadow register for reliable
- * data receiption under heavy bus load. Therefore it makes sense to use
- * this message object for the needed use case. The frame type (EFF/SFF)
- * for the message object 15 can be defined via kernel module parameter
- * "msgobj15_eff". If not equal 0, it will receive 29-bit EFF frames,
- * otherwise 11 bit SFF messages.
- */
-static int msgobj15_eff;
-module_param(msgobj15_eff, int, S_IRUGO);
-MODULE_PARM_DESC(msgobj15_eff, "Extended 29-bit frames for message object 15 "
-		 "(default: 11-bit standard frames)");
-
-static int i82527_compat;
-module_param(i82527_compat, int, S_IRUGO);
-MODULE_PARM_DESC(i82527_compat, "Strict Intel 82527 comptibility mode "
-		 "without using additional functions");
-
-/*
- * This driver uses the last 5 message objects 11..15. The definitions
- * and structure below allows to configure and assign them to the real
- * message object.
- */
-static unsigned char cc770_obj_flags[CC770_OBJ_MAX] = {
-	[CC770_OBJ_RX0] = CC770_OBJ_FLAG_RX,
-	[CC770_OBJ_RX1] = CC770_OBJ_FLAG_RX | CC770_OBJ_FLAG_EFF,
-	[CC770_OBJ_RX_RTR0] = CC770_OBJ_FLAG_RX | CC770_OBJ_FLAG_RTR,
-	[CC770_OBJ_RX_RTR1] = CC770_OBJ_FLAG_RX | CC770_OBJ_FLAG_RTR |
-			      CC770_OBJ_FLAG_EFF,
-	[CC770_OBJ_TX] = 0,
-};
-
-static struct can_bittiming_const cc770_bittiming_const = {
-	.name = DRV_NAME,
-	.tseg1_min = 1,
-	.tseg1_max = 16,
-	.tseg2_min = 1,
-	.tseg2_max = 8,
-	.sjw_max = 4,
-	.brp_min = 1,
-	.brp_max = 64,
-	.brp_inc = 1,
-};
-
-static inline int intid2obj(unsigned int intid)
-{
-	if (intid == 2)
-		return 0;
-	else
-		return MSGOBJ_LAST + 2 - intid;
-}
-
-static void enable_all_objs(const struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	u8 msgcfg;
-	unsigned char obj_flags;
-	unsigned int o, mo;
-
-	for (o = 0; o <  CC770_OBJ_MAX; o++) {
-		obj_flags = priv->obj_flags[o];
-		mo = obj2msgobj(o);
-
-		if (obj_flags & CC770_OBJ_FLAG_RX) {
-			/*
-			 * We don't need extra objects for RTR and EFF if
-			 * the additional CC770 functions are enabled.
-			 */
-			if (priv->control_normal_mode & CTRL_EAF) {
-				if (o > 0)
-					continue;
-				netdev_dbg(dev, "Message object %d for "
-					   "RX data, RTR, SFF and EFF\n", mo);
-			} else {
-				netdev_dbg(dev,
-					   "Message object %d for RX %s %s\n",
-					   mo, obj_flags & CC770_OBJ_FLAG_RTR ?
-					   "RTR" : "data",
-					   obj_flags & CC770_OBJ_FLAG_EFF ?
-					   "EFF" : "SFF");
-			}
-
-			if (obj_flags & CC770_OBJ_FLAG_EFF)
-				msgcfg = MSGCFG_XTD;
-			else
-				msgcfg = 0;
-			if (obj_flags & CC770_OBJ_FLAG_RTR)
-				msgcfg |= MSGCFG_DIR;
-
-			cc770_write_reg(priv, msgobj[mo].config, msgcfg);
-			cc770_write_reg(priv, msgobj[mo].ctrl0,
-					MSGVAL_SET | TXIE_RES |
-					RXIE_SET | INTPND_RES);
-
-			if (obj_flags & CC770_OBJ_FLAG_RTR)
-				cc770_write_reg(priv, msgobj[mo].ctrl1,
-						NEWDAT_RES | CPUUPD_SET |
-						TXRQST_RES | RMTPND_RES);
-			else
-				cc770_write_reg(priv, msgobj[mo].ctrl1,
-						NEWDAT_RES | MSGLST_RES |
-						TXRQST_RES | RMTPND_RES);
-		} else {
-			netdev_dbg(dev, "Message object %d for "
-				   "TX data, RTR, SFF and EFF\n", mo);
-
-			cc770_write_reg(priv, msgobj[mo].ctrl1,
-					RMTPND_RES | TXRQST_RES |
-					CPUUPD_RES | NEWDAT_RES);
-			cc770_write_reg(priv, msgobj[mo].ctrl0,
-					MSGVAL_RES | TXIE_RES |
-					RXIE_RES | INTPND_RES);
-		}
-	}
-}
-
-static void disable_all_objs(const struct cc770_priv *priv)
-{
-	int i, mo;
-
-	for (i = 0; i <  CC770_OBJ_MAX; i++) {
-		mo = obj2msgobj(i);
-
-		if (priv->obj_flags[i] & CC770_OBJ_FLAG_RX) {
-			if (i > 0 && priv->control_normal_mode & CTRL_EAF)
-				continue;
-
-			cc770_write_reg(priv, msgobj[mo].ctrl1,
-					NEWDAT_RES | MSGLST_RES |
-					TXRQST_RES | RMTPND_RES);
-			cc770_write_reg(priv, msgobj[mo].ctrl0,
-					MSGVAL_RES | TXIE_RES |
-					RXIE_RES | INTPND_RES);
-		} else {
-			/* Clear message object for send */
-			cc770_write_reg(priv, msgobj[mo].ctrl1,
-					RMTPND_RES | TXRQST_RES |
-					CPUUPD_RES | NEWDAT_RES);
-			cc770_write_reg(priv, msgobj[mo].ctrl0,
-					MSGVAL_RES | TXIE_RES |
-					RXIE_RES | INTPND_RES);
-		}
-	}
-}
-
-static void set_reset_mode(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-
-	/* Enable configuration and puts chip in bus-off, disable interrupts */
-	cc770_write_reg(priv, control, CTRL_CCE | CTRL_INI);
-
-	priv->can.state = CAN_STATE_STOPPED;
-
-	/* Clear interrupts */
-	cc770_read_reg(priv, interrupt);
-
-	/* Clear status register */
-	cc770_write_reg(priv, status, 0);
-
-	/* Disable all used message objects */
-	disable_all_objs(priv);
-}
-
-static void set_normal_mode(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-
-	/* Clear interrupts */
-	cc770_read_reg(priv, interrupt);
-
-	/* Clear status register and pre-set last error code */
-	cc770_write_reg(priv, status, STAT_LEC_MASK);
-
-	/* Enable all used message objects*/
-	enable_all_objs(dev);
-
-	/*
-	 * Clear bus-off, interrupts only for errors,
-	 * not for status change
-	 */
-	cc770_write_reg(priv, control, priv->control_normal_mode);
-
-	priv->can.state = CAN_STATE_ERROR_ACTIVE;
-}
-
-static void chipset_init(struct cc770_priv *priv)
-{
-	int mo, id, data;
-
-	/* Enable configuration and put chip in bus-off, disable interrupts */
-	cc770_write_reg(priv, control, (CTRL_CCE | CTRL_INI));
-
-	/* Set CLKOUT divider and slew rates */
-	cc770_write_reg(priv, clkout, priv->clkout);
-
-	/* Configure CPU interface / CLKOUT enable */
-	cc770_write_reg(priv, cpu_interface, priv->cpu_interface | CPUIF_CEN);
-
-	/* Set bus configuration  */
-	cc770_write_reg(priv, bus_config, priv->bus_config);
-
-	/* Clear interrupts */
-	cc770_read_reg(priv, interrupt);
-
-	/* Clear status register */
-	cc770_write_reg(priv, status, 0);
-
-	/* Clear and invalidate message objects */
-	for (mo = MSGOBJ_FIRST; mo <= MSGOBJ_LAST; mo++) {
-		cc770_write_reg(priv, msgobj[mo].ctrl0,
-				INTPND_UNC | RXIE_RES |
-				TXIE_RES | MSGVAL_RES);
-		cc770_write_reg(priv, msgobj[mo].ctrl0,
-				INTPND_RES | RXIE_RES |
-				TXIE_RES | MSGVAL_RES);
-		cc770_write_reg(priv, msgobj[mo].ctrl1,
-				NEWDAT_RES | MSGLST_RES |
-				TXRQST_RES | RMTPND_RES);
-		for (data = 0; data < 8; data++)
-			cc770_write_reg(priv, msgobj[mo].data[data], 0);
-		for (id = 0; id < 4; id++)
-			cc770_write_reg(priv, msgobj[mo].id[id], 0);
-		cc770_write_reg(priv, msgobj[mo].config, 0);
-	}
-
-	/* Set all global ID masks to "don't care" */
-	cc770_write_reg(priv, global_mask_std[0], 0);
-	cc770_write_reg(priv, global_mask_std[1], 0);
-	cc770_write_reg(priv, global_mask_ext[0], 0);
-	cc770_write_reg(priv, global_mask_ext[1], 0);
-	cc770_write_reg(priv, global_mask_ext[2], 0);
-	cc770_write_reg(priv, global_mask_ext[3], 0);
-
-}
-
-static int cc770_probe_chip(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-
-	/* Enable configuration, put chip in bus-off, disable ints */
-	cc770_write_reg(priv, control, CTRL_CCE | CTRL_EAF | CTRL_INI);
-	/* Configure cpu interface / CLKOUT disable */
-	cc770_write_reg(priv, cpu_interface, priv->cpu_interface);
-
-	/*
-	 * Check if hardware reset is still inactive or maybe there
-	 * is no chip in this address space
-	 */
-	if (cc770_read_reg(priv, cpu_interface) & CPUIF_RST) {
-		netdev_info(dev, "probing @0x%p failed (reset)\n",
-			    priv->reg_base);
-		return 0;
-	}
-
-	/* Write and read back test pattern */
-	cc770_write_reg(priv, msgobj[1].data[1], 0x25);
-	cc770_write_reg(priv, msgobj[2].data[3], 0x52);
-	cc770_write_reg(priv, msgobj[10].data[6], 0xc3);
-	if ((cc770_read_reg(priv, msgobj[1].data[1]) != 0x25) ||
-	    (cc770_read_reg(priv, msgobj[2].data[3]) != 0x52) ||
-	    (cc770_read_reg(priv, msgobj[10].data[6]) != 0xc3)) {
-		netdev_info(dev, "probing @0x%p failed (pattern)\n",
-			    priv->reg_base);
-		return 0;
-	}
-
-	/* Check if this chip is a CC770 supporting additional functions */
-	if (cc770_read_reg(priv, control) & CTRL_EAF)
-		priv->control_normal_mode |= CTRL_EAF;
-
-	return 1;
-}
-
-static void cc770_start(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-
-	/* leave reset mode */
-	if (priv->can.state != CAN_STATE_STOPPED)
-		set_reset_mode(dev);
-
-	/* leave reset mode */
-	set_normal_mode(dev);
-}
-
-static int cc770_set_mode(struct net_device *dev, enum can_mode mode)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-
-	if (!priv->open_time)
-		return -EINVAL;
-
-	switch (mode) {
-	case CAN_MODE_START:
-		cc770_start(dev);
-		if (netif_queue_stopped(dev))
-			netif_wake_queue(dev);
-		break;
-
-	default:
-		return -EOPNOTSUPP;
-	}
-
-	return 0;
-}
-
-static int cc770_set_bittiming(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	struct can_bittiming *bt = &priv->can.bittiming;
-	u8 btr0, btr1;
-
-	btr0 = ((bt->brp - 1) & 0x3f) | (((bt->sjw - 1) & 0x3) << 6);
-	btr1 = ((bt->prop_seg + bt->phase_seg1 - 1) & 0xf) |
-		(((bt->phase_seg2 - 1) & 0x7) << 4);
-	if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
-		btr1 |= 0x80;
-
-	netdev_info(dev, "setting BTR0=0x%02x BTR1=0x%02x\n", btr0, btr1);
-
-	cc770_write_reg(priv, bit_timing_0, btr0);
-	cc770_write_reg(priv, bit_timing_1, btr1);
-
-	return 0;
-}
-
-static netdev_tx_t cc770_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	struct net_device_stats *stats = &dev->stats;
-	struct can_frame *cf = (struct can_frame *)skb->data;
-	unsigned int mo = obj2msgobj(CC770_OBJ_TX);
-	u8 dlc, rtr;
-	u32 id;
-	int i;
-
-	if (can_dropped_invalid_skb(dev, skb))
-		return NETDEV_TX_OK;
-
-	if ((cc770_read_reg(priv,
-			    msgobj[mo].ctrl1) & TXRQST_UNC) == TXRQST_SET) {
-		netdev_err(dev, "TX register is still occupied!\n");
-		return NETDEV_TX_BUSY;
-	}
-
-	netif_stop_queue(dev);
-
-	dlc = cf->can_dlc;
-	id = cf->can_id;
-	if (cf->can_id & CAN_RTR_FLAG)
-		rtr = 0;
-	else
-		rtr = MSGCFG_DIR;
-	cc770_write_reg(priv, msgobj[mo].ctrl1,
-			RMTPND_RES | TXRQST_RES | CPUUPD_SET | NEWDAT_RES);
-	cc770_write_reg(priv, msgobj[mo].ctrl0,
-			MSGVAL_SET | TXIE_SET | RXIE_RES | INTPND_RES);
-	if (id & CAN_EFF_FLAG) {
-		id &= CAN_EFF_MASK;
-		cc770_write_reg(priv, msgobj[mo].config,
-				(dlc << 4) + rtr + MSGCFG_XTD);
-		cc770_write_reg(priv, msgobj[mo].id[3],
-				(id << 3) & 0xFFU);
-		cc770_write_reg(priv, msgobj[mo].id[2],
-				(id >> 5) & 0xFFU);
-		cc770_write_reg(priv, msgobj[mo].id[1],
-				(id >> 13) & 0xFFU);
-		cc770_write_reg(priv, msgobj[mo].id[0],
-				(id >> 21) & 0xFFU);
-	} else {
-		id &= CAN_SFF_MASK;
-		cc770_write_reg(priv, msgobj[mo].config,
-				(dlc << 4) + rtr);
-		cc770_write_reg(priv, msgobj[mo].id[0],
-				(id >> 3) & 0xFFU);
-		cc770_write_reg(priv, msgobj[mo].id[1],
-				(id << 5) & 0xFFU);
-	}
-
-	dlc &= 0x0f;		/* restore length only */
-	for (i = 0; i < dlc; i++)
-		cc770_write_reg(priv, msgobj[mo].data[i], cf->data[i]);
-
-	cc770_write_reg(priv, msgobj[mo].ctrl1,
-			RMTPND_RES | TXRQST_SET | CPUUPD_RES | NEWDAT_UNC);
-
-	stats->tx_bytes += dlc;
-
-	can_put_echo_skb(skb, dev, 0);
-
-	/*
-	 * HM: We had some cases of repeated IRQs so make sure the
-	 * INT is acknowledged I know it's already further up, but
-	 * doing again fixed the issue
-	 */
-	cc770_write_reg(priv, msgobj[mo].ctrl0,
-			MSGVAL_UNC | TXIE_UNC | RXIE_UNC | INTPND_RES);
-
-	return NETDEV_TX_OK;
-}
-
-static void cc770_rx(struct net_device *dev, unsigned int mo, u8 ctrl1)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	struct net_device_stats *stats = &dev->stats;
-	struct can_frame *cf;
-	struct sk_buff *skb;
-	u8 config;
-	u32 id;
-	int i;
-
-	skb = alloc_can_skb(dev, &cf);
-	if (skb == NULL)
-		return;
-
-	config = cc770_read_reg(priv, msgobj[mo].config);
-
-	if (ctrl1 & RMTPND_SET) {
-		/*
-		 * Unfortunately, the chip does not store the real message
-		 * identifier of the received remote transmission request
-		 * frame. Therefore we set it to 0.
-		 */
-		cf->can_id = CAN_RTR_FLAG;
-		if (config & MSGCFG_XTD)
-			cf->can_id |= CAN_EFF_FLAG;
-		cf->can_dlc = 0;
-	} else {
-		if (config & MSGCFG_XTD) {
-			id = cc770_read_reg(priv, msgobj[mo].id[3]);
-			id |= cc770_read_reg(priv, msgobj[mo].id[2]) << 8;
-			id |= cc770_read_reg(priv, msgobj[mo].id[1]) << 16;
-			id |= cc770_read_reg(priv, msgobj[mo].id[0]) << 24;
-			id >>= 3;
-			id |= CAN_EFF_FLAG;
-		} else {
-			id = cc770_read_reg(priv, msgobj[mo].id[1]);
-			id |= cc770_read_reg(priv, msgobj[mo].id[0]) << 8;
-			id >>= 5;
-		}
-
-		cf->can_id = id;
-		cf->can_dlc = get_can_dlc((config & 0xf0) >> 4);
-		for (i = 0; i < cf->can_dlc; i++)
-			cf->data[i] = cc770_read_reg(priv, msgobj[mo].data[i]);
-	}
-	netif_rx(skb);
-
-	stats->rx_packets++;
-	stats->rx_bytes += cf->can_dlc;
-}
-
-static int cc770_err(struct net_device *dev, u8 status)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	struct net_device_stats *stats = &dev->stats;
-	struct can_frame *cf;
-	struct sk_buff *skb;
-	u8 lec;
-
-	netdev_dbg(dev, "status interrupt (%#x)\n", status);
-
-	skb = alloc_can_err_skb(dev, &cf);
-	if (skb == NULL)
-		return -ENOMEM;
-
-	if (status & STAT_BOFF) {
-		/* Disable interrupts */
-		cc770_write_reg(priv, control, CTRL_INI);
-		cf->can_id |= CAN_ERR_BUSOFF;
-		priv->can.state = CAN_STATE_BUS_OFF;
-		can_bus_off(dev);
-	} else if (status & STAT_WARN) {
-		cf->can_id |= CAN_ERR_CRTL;
-		cf->data[1] = CAN_ERR_CRTL_RX_WARNING | CAN_ERR_CRTL_TX_WARNING;
-		priv->can.state = CAN_STATE_ERROR_WARNING;
-		priv->can.can_stats.error_warning++;
-	}
-
-	lec = status & STAT_LEC_MASK;
-	if (lec < 7 && lec > 0) {
-		if (lec == STAT_LEC_ACK) {
-			cf->can_id |= CAN_ERR_ACK;
-		} else {
-			cf->can_id |= CAN_ERR_PROT;
-			switch (lec) {
-			case STAT_LEC_STUFF:
-				cf->data[2] |= CAN_ERR_PROT_STUFF;
-				break;
-			case STAT_LEC_FORM:
-				cf->data[2] |= CAN_ERR_PROT_FORM;
-				break;
-			case STAT_LEC_BIT1:
-				cf->data[2] |= CAN_ERR_PROT_BIT1;
-				break;
-			case STAT_LEC_BIT0:
-				cf->data[2] |= CAN_ERR_PROT_BIT0;
-				break;
-			case STAT_LEC_CRC:
-				cf->data[3] |= CAN_ERR_PROT_LOC_CRC_SEQ;
-				break;
-			}
-		}
-	}
-
-	netif_rx(skb);
-
-	stats->rx_packets++;
-	stats->rx_bytes += cf->can_dlc;
-
-	return 0;
-}
-
-static int cc770_status_interrupt(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	u8 status;
-
-	status = cc770_read_reg(priv, status);
-	/* Reset the status register including RXOK and TXOK */
-	cc770_write_reg(priv, status, STAT_LEC_MASK);
-
-	if (status & (STAT_WARN | STAT_BOFF) ||
-	    (status & STAT_LEC_MASK) != STAT_LEC_MASK) {
-		cc770_err(dev, status);
-		return status & STAT_BOFF;
-	}
-
-	return 0;
-}
-
-static void cc770_rx_interrupt(struct net_device *dev, unsigned int o)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	struct net_device_stats *stats = &dev->stats;
-	unsigned int mo = obj2msgobj(o);
-	u8 ctrl1;
-
-	while (1) {
-		ctrl1 = cc770_read_reg(priv, msgobj[mo].ctrl1);
-
-		if (!(ctrl1 & NEWDAT_SET))  {
-			/* Check for RTR if additional functions are enabled */
-			if (priv->control_normal_mode & CTRL_EAF) {
-				if (!(cc770_read_reg(priv, msgobj[mo].ctrl0) &
-				      INTPND_SET))
-					break;
-			} else {
-				break;
-			}
-		}
-
-		if (ctrl1 & MSGLST_SET) {
-			stats->rx_over_errors++;
-			stats->rx_errors++;
-		}
-		if (mo < MSGOBJ_LAST)
-			cc770_write_reg(priv, msgobj[mo].ctrl1,
-					NEWDAT_RES | MSGLST_RES |
-					TXRQST_UNC | RMTPND_UNC);
-		cc770_rx(dev, mo, ctrl1);
-
-		cc770_write_reg(priv, msgobj[mo].ctrl0,
-				MSGVAL_SET | TXIE_RES |
-				RXIE_SET | INTPND_RES);
-		cc770_write_reg(priv, msgobj[mo].ctrl1,
-				NEWDAT_RES | MSGLST_RES |
-				TXRQST_RES | RMTPND_RES);
-	}
-}
-
-static void cc770_rtr_interrupt(struct net_device *dev, unsigned int o)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	unsigned int mo = obj2msgobj(o);
-	u8 ctrl0, ctrl1;
-
-	while (1) {
-		ctrl0 = cc770_read_reg(priv, msgobj[mo].ctrl0);
-		if (!(ctrl0 & INTPND_SET))
-			break;
-
-		ctrl1 = cc770_read_reg(priv, msgobj[mo].ctrl1);
-		cc770_rx(dev, mo, ctrl1);
-
-		cc770_write_reg(priv, msgobj[mo].ctrl0,
-				MSGVAL_SET | TXIE_RES |
-				RXIE_SET | INTPND_RES);
-		cc770_write_reg(priv, msgobj[mo].ctrl1,
-				NEWDAT_RES | CPUUPD_SET |
-				TXRQST_RES | RMTPND_RES);
-	}
-}
-
-static void cc770_tx_interrupt(struct net_device *dev, unsigned int o)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-	struct net_device_stats *stats = &dev->stats;
-	unsigned int mo = obj2msgobj(o);
-
-	/* Nothing more to send, switch off interrupts */
-	cc770_write_reg(priv, msgobj[mo].ctrl0,
-			MSGVAL_RES | TXIE_RES | RXIE_RES | INTPND_RES);
-	/*
-	 * We had some cases of repeated IRQ so make sure the
-	 * INT is acknowledged
-	 */
-	cc770_write_reg(priv, msgobj[mo].ctrl0,
-			MSGVAL_UNC | TXIE_UNC | RXIE_UNC | INTPND_RES);
-
-	stats->tx_packets++;
-	can_get_echo_skb(dev, 0);
-	netif_wake_queue(dev);
-}
-
-irqreturn_t cc770_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = (struct net_device *)dev_id;
-	struct cc770_priv *priv = netdev_priv(dev);
-	u8 intid;
-	int o, n = 0;
-
-	/* Shared interrupts and IRQ off? */
-	if (priv->can.state == CAN_STATE_STOPPED)
-		return IRQ_NONE;
-
-	if (priv->pre_irq)
-		priv->pre_irq(priv);
-
-	while (n < CC770_MAX_IRQ) {
-		/* Read the highest pending interrupt request */
-		intid = cc770_read_reg(priv, interrupt);
-		if (!intid)
-			break;
-		n++;
-
-		if (intid == 1) {
-			/* Exit in case of bus-off */
-			if (cc770_status_interrupt(dev))
-				break;
-		} else {
-			o = intid2obj(intid);
-
-			if (o >= CC770_OBJ_MAX) {
-				netdev_err(dev, "Unexpected interrupt id %d\n",
-					   intid);
-				continue;
-			}
-
-			if (priv->obj_flags[o] & CC770_OBJ_FLAG_RTR)
-				cc770_rtr_interrupt(dev, o);
-			else if (priv->obj_flags[o] & CC770_OBJ_FLAG_RX)
-				cc770_rx_interrupt(dev, o);
-			else
-				cc770_tx_interrupt(dev, o);
-		}
-	}
-
-	if (priv->post_irq)
-		priv->post_irq(priv);
-
-	if (n >= CC770_MAX_IRQ)
-		netdev_dbg(dev, "%d messages handled in ISR", n);
-
-	return (n) ? IRQ_HANDLED : IRQ_NONE;
-}
-
-static int cc770_open(struct net_device *dev)
-{
-	struct cc770_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;
-
-	err = request_irq(dev->irq, &cc770_interrupt, priv->irq_flags,
-			  dev->name, (void *)dev);
-	if (err) {
-		close_candev(dev);
-		return -EAGAIN;
-	}
-
-	/* init and start chip */
-	cc770_start(dev);
-	priv->open_time = jiffies;
-
-	netif_start_queue(dev);
-
-	return 0;
-}
-
-static int cc770_close(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-
-	netif_stop_queue(dev);
-	set_reset_mode(dev);
-
-	free_irq(dev->irq, (void *)dev);
-	close_candev(dev);
-
-	priv->open_time = 0;
-
-	return 0;
-}
-
-struct net_device *alloc_cc770dev(int sizeof_priv)
-{
-	struct net_device *dev;
-	struct cc770_priv *priv;
-
-	dev = alloc_candev(sizeof(struct cc770_priv) + sizeof_priv,
-			   CC770_ECHO_SKB_MAX);
-	if (!dev)
-		return NULL;
-
-	priv = netdev_priv(dev);
-
-	priv->dev = dev;
-	priv->can.bittiming_const = &cc770_bittiming_const;
-	priv->can.do_set_bittiming = cc770_set_bittiming;
-	priv->can.do_set_mode = cc770_set_mode;
-	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
-
-	memcpy(priv->obj_flags, cc770_obj_flags, sizeof(cc770_obj_flags));
-
-	if (sizeof_priv)
-		priv->priv = (void *)priv + sizeof(struct cc770_priv);
-
-	return dev;
-}
-EXPORT_SYMBOL_GPL(alloc_cc770dev);
-
-void free_cc770dev(struct net_device *dev)
-{
-	free_candev(dev);
-}
-EXPORT_SYMBOL_GPL(free_cc770dev);
-
-static const struct net_device_ops cc770_netdev_ops = {
-	.ndo_open = cc770_open,
-	.ndo_stop = cc770_close,
-	.ndo_start_xmit = cc770_start_xmit,
-};
-
-int register_cc770dev(struct net_device *dev)
-{
-	struct cc770_priv *priv = netdev_priv(dev);
-
-	if (!cc770_probe_chip(dev))
-		return -ENODEV;
-
-	dev->netdev_ops = &cc770_netdev_ops;
-
-	dev->flags |= IFF_ECHO;	/* we support local echo */
-
-	/* Should we use additional functions? */
-	if (!i82527_compat && priv->control_normal_mode & CTRL_EAF) {
-		priv->control_normal_mode = CTRL_IE | CTRL_EAF | CTRL_EIE;
-		netdev_dbg(dev, "i82527 mode with additional functions\n");
-	} else {
-		priv->control_normal_mode = CTRL_IE | CTRL_EIE;
-		netdev_dbg(dev, "strict i82527 compatibility mode\n");
-	}
-
-	chipset_init(priv);
-	set_reset_mode(dev);
-
-	return register_candev(dev);
-}
-EXPORT_SYMBOL_GPL(register_cc770dev);
-
-void unregister_cc770dev(struct net_device *dev)
-{
-	set_reset_mode(dev);
-	unregister_candev(dev);
-}
-EXPORT_SYMBOL_GPL(unregister_cc770dev);
-
-static __init int cc770_init(void)
-{
-	if (msgobj15_eff) {
-		cc770_obj_flags[CC770_OBJ_RX0] |= CC770_OBJ_FLAG_EFF;
-		cc770_obj_flags[CC770_OBJ_RX1] &= ~CC770_OBJ_FLAG_EFF;
-	}
-
-	pr_info("%s CAN netdevice driver\n", DRV_NAME);
-
-	return 0;
-}
-module_init(cc770_init);
-
-static __exit void cc770_exit(void)
-{
-	pr_info("%s: driver removed\n", DRV_NAME);
-}
-module_exit(cc770_exit);