diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/net/can/mscan/mscan.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/net/can/mscan/mscan.c | 722 |
1 files changed, 0 insertions, 722 deletions
diff --git a/ANDROID_3.4.5/drivers/net/can/mscan/mscan.c b/ANDROID_3.4.5/drivers/net/can/mscan/mscan.c deleted file mode 100644 index 41a2a2dd..00000000 --- a/ANDROID_3.4.5/drivers/net/can/mscan/mscan.c +++ /dev/null @@ -1,722 +0,0 @@ -/* - * CAN bus driver for the alone generic (as possible as) MSCAN controller. - * - * Copyright (C) 2005-2006 Andrey Volkov <avolkov@varma-el.com>, - * Varma Electronics Oy - * Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com> - * Copyright (C) 2008-2009 Pengutronix <kernel@pengutronix.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the version 2 of the GNU General Public License - * as published by the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/netdevice.h> -#include <linux/if_arp.h> -#include <linux/if_ether.h> -#include <linux/list.h> -#include <linux/can/dev.h> -#include <linux/can/error.h> -#include <linux/io.h> - -#include "mscan.h" - -static struct can_bittiming_const mscan_bittiming_const = { - .name = "mscan", - .tseg1_min = 4, - .tseg1_max = 16, - .tseg2_min = 2, - .tseg2_max = 8, - .sjw_max = 4, - .brp_min = 1, - .brp_max = 64, - .brp_inc = 1, -}; - -struct mscan_state { - u8 mode; - u8 canrier; - u8 cantier; -}; - -static enum can_state state_map[] = { - CAN_STATE_ERROR_ACTIVE, - CAN_STATE_ERROR_WARNING, - CAN_STATE_ERROR_PASSIVE, - CAN_STATE_BUS_OFF -}; - -static int mscan_set_mode(struct net_device *dev, u8 mode) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - int ret = 0; - int i; - u8 canctl1; - - if (mode != MSCAN_NORMAL_MODE) { - if (priv->tx_active) { - /* Abort transfers before going to sleep */# - out_8(®s->cantarq, priv->tx_active); - /* Suppress TX done interrupts */ - out_8(®s->cantier, 0); - } - - canctl1 = in_8(®s->canctl1); - if ((mode & MSCAN_SLPRQ) && !(canctl1 & MSCAN_SLPAK)) { - setbits8(®s->canctl0, MSCAN_SLPRQ); - for (i = 0; i < MSCAN_SET_MODE_RETRIES; i++) { - if (in_8(®s->canctl1) & MSCAN_SLPAK) - break; - udelay(100); - } - /* - * The mscan controller will fail to enter sleep mode, - * while there are irregular activities on bus, like - * somebody keeps retransmitting. This behavior is - * undocumented and seems to differ between mscan built - * in mpc5200b and mpc5200. We proceed in that case, - * since otherwise the slprq will be kept set and the - * controller will get stuck. NOTE: INITRQ or CSWAI - * will abort all active transmit actions, if still - * any, at once. - */ - if (i >= MSCAN_SET_MODE_RETRIES) - netdev_dbg(dev, - "device failed to enter sleep mode. " - "We proceed anyhow.\n"); - else - priv->can.state = CAN_STATE_SLEEPING; - } - - if ((mode & MSCAN_INITRQ) && !(canctl1 & MSCAN_INITAK)) { - setbits8(®s->canctl0, MSCAN_INITRQ); - for (i = 0; i < MSCAN_SET_MODE_RETRIES; i++) { - if (in_8(®s->canctl1) & MSCAN_INITAK) - break; - } - if (i >= MSCAN_SET_MODE_RETRIES) - ret = -ENODEV; - } - if (!ret) - priv->can.state = CAN_STATE_STOPPED; - - if (mode & MSCAN_CSWAI) - setbits8(®s->canctl0, MSCAN_CSWAI); - - } else { - canctl1 = in_8(®s->canctl1); - if (canctl1 & (MSCAN_SLPAK | MSCAN_INITAK)) { - clrbits8(®s->canctl0, MSCAN_SLPRQ | MSCAN_INITRQ); - for (i = 0; i < MSCAN_SET_MODE_RETRIES; i++) { - canctl1 = in_8(®s->canctl1); - if (!(canctl1 & (MSCAN_INITAK | MSCAN_SLPAK))) - break; - } - if (i >= MSCAN_SET_MODE_RETRIES) - ret = -ENODEV; - else - priv->can.state = CAN_STATE_ERROR_ACTIVE; - } - } - return ret; -} - -static int mscan_start(struct net_device *dev) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - u8 canrflg; - int err; - - out_8(®s->canrier, 0); - - INIT_LIST_HEAD(&priv->tx_head); - priv->prev_buf_id = 0; - priv->cur_pri = 0; - priv->tx_active = 0; - priv->shadow_canrier = 0; - priv->flags = 0; - - if (priv->type == MSCAN_TYPE_MPC5121) { - /* Clear pending bus-off condition */ - if (in_8(®s->canmisc) & MSCAN_BOHOLD) - out_8(®s->canmisc, MSCAN_BOHOLD); - } - - err = mscan_set_mode(dev, MSCAN_NORMAL_MODE); - if (err) - return err; - - canrflg = in_8(®s->canrflg); - priv->shadow_statflg = canrflg & MSCAN_STAT_MSK; - priv->can.state = state_map[max(MSCAN_STATE_RX(canrflg), - MSCAN_STATE_TX(canrflg))]; - out_8(®s->cantier, 0); - - /* Enable receive interrupts. */ - out_8(®s->canrier, MSCAN_RX_INTS_ENABLE); - - return 0; -} - -static int mscan_restart(struct net_device *dev) -{ - struct mscan_priv *priv = netdev_priv(dev); - - if (priv->type == MSCAN_TYPE_MPC5121) { - struct mscan_regs __iomem *regs = priv->reg_base; - - priv->can.state = CAN_STATE_ERROR_ACTIVE; - WARN(!(in_8(®s->canmisc) & MSCAN_BOHOLD), - "bus-off state expected\n"); - out_8(®s->canmisc, MSCAN_BOHOLD); - /* Re-enable receive interrupts. */ - out_8(®s->canrier, MSCAN_RX_INTS_ENABLE); - } else { - if (priv->can.state <= CAN_STATE_BUS_OFF) - mscan_set_mode(dev, MSCAN_INIT_MODE); - return mscan_start(dev); - } - - return 0; -} - -static netdev_tx_t mscan_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct can_frame *frame = (struct can_frame *)skb->data; - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - int i, rtr, buf_id; - u32 can_id; - - if (can_dropped_invalid_skb(dev, skb)) - return NETDEV_TX_OK; - - out_8(®s->cantier, 0); - - i = ~priv->tx_active & MSCAN_TXE; - buf_id = ffs(i) - 1; - switch (hweight8(i)) { - case 0: - netif_stop_queue(dev); - netdev_err(dev, "Tx Ring full when queue awake!\n"); - return NETDEV_TX_BUSY; - case 1: - /* - * if buf_id < 3, then current frame will be send out of order, - * since buffer with lower id have higher priority (hell..) - */ - netif_stop_queue(dev); - case 2: - if (buf_id < priv->prev_buf_id) { - priv->cur_pri++; - if (priv->cur_pri == 0xff) { - set_bit(F_TX_WAIT_ALL, &priv->flags); - netif_stop_queue(dev); - } - } - set_bit(F_TX_PROGRESS, &priv->flags); - break; - } - priv->prev_buf_id = buf_id; - out_8(®s->cantbsel, i); - - rtr = frame->can_id & CAN_RTR_FLAG; - - /* RTR is always the lowest bit of interest, then IDs follow */ - if (frame->can_id & CAN_EFF_FLAG) { - can_id = (frame->can_id & CAN_EFF_MASK) - << (MSCAN_EFF_RTR_SHIFT + 1); - if (rtr) - can_id |= 1 << MSCAN_EFF_RTR_SHIFT; - out_be16(®s->tx.idr3_2, can_id); - - can_id >>= 16; - /* EFF_FLAGS are between the IDs :( */ - can_id = (can_id & 0x7) | ((can_id << 2) & 0xffe0) - | MSCAN_EFF_FLAGS; - } else { - can_id = (frame->can_id & CAN_SFF_MASK) - << (MSCAN_SFF_RTR_SHIFT + 1); - if (rtr) - can_id |= 1 << MSCAN_SFF_RTR_SHIFT; - } - out_be16(®s->tx.idr1_0, can_id); - - if (!rtr) { - void __iomem *data = ®s->tx.dsr1_0; - u16 *payload = (u16 *)frame->data; - - for (i = 0; i < frame->can_dlc / 2; i++) { - out_be16(data, *payload++); - data += 2 + _MSCAN_RESERVED_DSR_SIZE; - } - /* write remaining byte if necessary */ - if (frame->can_dlc & 1) - out_8(data, frame->data[frame->can_dlc - 1]); - } - - out_8(®s->tx.dlr, frame->can_dlc); - out_8(®s->tx.tbpr, priv->cur_pri); - - /* Start transmission. */ - out_8(®s->cantflg, 1 << buf_id); - - if (!test_bit(F_TX_PROGRESS, &priv->flags)) - dev->trans_start = jiffies; - - list_add_tail(&priv->tx_queue[buf_id].list, &priv->tx_head); - - can_put_echo_skb(skb, dev, buf_id); - - /* Enable interrupt. */ - priv->tx_active |= 1 << buf_id; - out_8(®s->cantier, priv->tx_active); - - return NETDEV_TX_OK; -} - -/* This function returns the old state to see where we came from */ -static enum can_state check_set_state(struct net_device *dev, u8 canrflg) -{ - struct mscan_priv *priv = netdev_priv(dev); - enum can_state state, old_state = priv->can.state; - - if (canrflg & MSCAN_CSCIF && old_state <= CAN_STATE_BUS_OFF) { - state = state_map[max(MSCAN_STATE_RX(canrflg), - MSCAN_STATE_TX(canrflg))]; - priv->can.state = state; - } - return old_state; -} - -static void mscan_get_rx_frame(struct net_device *dev, struct can_frame *frame) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - u32 can_id; - int i; - - can_id = in_be16(®s->rx.idr1_0); - if (can_id & (1 << 3)) { - frame->can_id = CAN_EFF_FLAG; - can_id = ((can_id << 16) | in_be16(®s->rx.idr3_2)); - can_id = ((can_id & 0xffe00000) | - ((can_id & 0x7ffff) << 2)) >> 2; - } else { - can_id >>= 4; - frame->can_id = 0; - } - - frame->can_id |= can_id >> 1; - if (can_id & 1) - frame->can_id |= CAN_RTR_FLAG; - - frame->can_dlc = get_can_dlc(in_8(®s->rx.dlr) & 0xf); - - if (!(frame->can_id & CAN_RTR_FLAG)) { - void __iomem *data = ®s->rx.dsr1_0; - u16 *payload = (u16 *)frame->data; - - for (i = 0; i < frame->can_dlc / 2; i++) { - *payload++ = in_be16(data); - data += 2 + _MSCAN_RESERVED_DSR_SIZE; - } - /* read remaining byte if necessary */ - if (frame->can_dlc & 1) - frame->data[frame->can_dlc - 1] = in_8(data); - } - - out_8(®s->canrflg, MSCAN_RXF); -} - -static void mscan_get_err_frame(struct net_device *dev, struct can_frame *frame, - u8 canrflg) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - struct net_device_stats *stats = &dev->stats; - enum can_state old_state; - - netdev_dbg(dev, "error interrupt (canrflg=%#x)\n", canrflg); - frame->can_id = CAN_ERR_FLAG; - - if (canrflg & MSCAN_OVRIF) { - frame->can_id |= CAN_ERR_CRTL; - frame->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; - stats->rx_over_errors++; - stats->rx_errors++; - } else { - frame->data[1] = 0; - } - - old_state = check_set_state(dev, canrflg); - /* State changed */ - if (old_state != priv->can.state) { - switch (priv->can.state) { - case CAN_STATE_ERROR_WARNING: - frame->can_id |= CAN_ERR_CRTL; - priv->can.can_stats.error_warning++; - if ((priv->shadow_statflg & MSCAN_RSTAT_MSK) < - (canrflg & MSCAN_RSTAT_MSK)) - frame->data[1] |= CAN_ERR_CRTL_RX_WARNING; - if ((priv->shadow_statflg & MSCAN_TSTAT_MSK) < - (canrflg & MSCAN_TSTAT_MSK)) - frame->data[1] |= CAN_ERR_CRTL_TX_WARNING; - break; - case CAN_STATE_ERROR_PASSIVE: - frame->can_id |= CAN_ERR_CRTL; - priv->can.can_stats.error_passive++; - frame->data[1] |= CAN_ERR_CRTL_RX_PASSIVE; - break; - case CAN_STATE_BUS_OFF: - frame->can_id |= CAN_ERR_BUSOFF; - /* - * The MSCAN on the MPC5200 does recover from bus-off - * automatically. To avoid that we stop the chip doing - * a light-weight stop (we are in irq-context). - */ - if (priv->type != MSCAN_TYPE_MPC5121) { - out_8(®s->cantier, 0); - out_8(®s->canrier, 0); - setbits8(®s->canctl0, - MSCAN_SLPRQ | MSCAN_INITRQ); - } - can_bus_off(dev); - break; - default: - break; - } - } - priv->shadow_statflg = canrflg & MSCAN_STAT_MSK; - frame->can_dlc = CAN_ERR_DLC; - out_8(®s->canrflg, MSCAN_ERR_IF); -} - -static int mscan_rx_poll(struct napi_struct *napi, int quota) -{ - struct mscan_priv *priv = container_of(napi, struct mscan_priv, napi); - struct net_device *dev = napi->dev; - struct mscan_regs __iomem *regs = priv->reg_base; - struct net_device_stats *stats = &dev->stats; - int npackets = 0; - int ret = 1; - struct sk_buff *skb; - struct can_frame *frame; - u8 canrflg; - - while (npackets < quota) { - canrflg = in_8(®s->canrflg); - if (!(canrflg & (MSCAN_RXF | MSCAN_ERR_IF))) - break; - - skb = alloc_can_skb(dev, &frame); - if (!skb) { - if (printk_ratelimit()) - netdev_notice(dev, "packet dropped\n"); - stats->rx_dropped++; - out_8(®s->canrflg, canrflg); - continue; - } - - if (canrflg & MSCAN_RXF) - mscan_get_rx_frame(dev, frame); - else if (canrflg & MSCAN_ERR_IF) - mscan_get_err_frame(dev, frame, canrflg); - - stats->rx_packets++; - stats->rx_bytes += frame->can_dlc; - npackets++; - netif_receive_skb(skb); - } - - if (!(in_8(®s->canrflg) & (MSCAN_RXF | MSCAN_ERR_IF))) { - napi_complete(&priv->napi); - clear_bit(F_RX_PROGRESS, &priv->flags); - if (priv->can.state < CAN_STATE_BUS_OFF) - out_8(®s->canrier, priv->shadow_canrier); - ret = 0; - } - return ret; -} - -static irqreturn_t mscan_isr(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *)dev_id; - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - struct net_device_stats *stats = &dev->stats; - u8 cantier, cantflg, canrflg; - irqreturn_t ret = IRQ_NONE; - - cantier = in_8(®s->cantier) & MSCAN_TXE; - cantflg = in_8(®s->cantflg) & cantier; - - if (cantier && cantflg) { - struct list_head *tmp, *pos; - - list_for_each_safe(pos, tmp, &priv->tx_head) { - struct tx_queue_entry *entry = - list_entry(pos, struct tx_queue_entry, list); - u8 mask = entry->mask; - - if (!(cantflg & mask)) - continue; - - out_8(®s->cantbsel, mask); - stats->tx_bytes += in_8(®s->tx.dlr); - stats->tx_packets++; - can_get_echo_skb(dev, entry->id); - priv->tx_active &= ~mask; - list_del(pos); - } - - if (list_empty(&priv->tx_head)) { - clear_bit(F_TX_WAIT_ALL, &priv->flags); - clear_bit(F_TX_PROGRESS, &priv->flags); - priv->cur_pri = 0; - } else { - dev->trans_start = jiffies; - } - - if (!test_bit(F_TX_WAIT_ALL, &priv->flags)) - netif_wake_queue(dev); - - out_8(®s->cantier, priv->tx_active); - ret = IRQ_HANDLED; - } - - canrflg = in_8(®s->canrflg); - if ((canrflg & ~MSCAN_STAT_MSK) && - !test_and_set_bit(F_RX_PROGRESS, &priv->flags)) { - if (canrflg & ~MSCAN_STAT_MSK) { - priv->shadow_canrier = in_8(®s->canrier); - out_8(®s->canrier, 0); - napi_schedule(&priv->napi); - ret = IRQ_HANDLED; - } else { - clear_bit(F_RX_PROGRESS, &priv->flags); - } - } - return ret; -} - -static int mscan_do_set_mode(struct net_device *dev, enum can_mode mode) -{ - struct mscan_priv *priv = netdev_priv(dev); - int ret = 0; - - if (!priv->open_time) - return -EINVAL; - - switch (mode) { - case CAN_MODE_START: - ret = mscan_restart(dev); - if (ret) - break; - if (netif_queue_stopped(dev)) - netif_wake_queue(dev); - break; - - default: - ret = -EOPNOTSUPP; - break; - } - return ret; -} - -static int mscan_do_set_bittiming(struct net_device *dev) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - struct can_bittiming *bt = &priv->can.bittiming; - u8 btr0, btr1; - - btr0 = BTR0_SET_BRP(bt->brp) | BTR0_SET_SJW(bt->sjw); - btr1 = (BTR1_SET_TSEG1(bt->prop_seg + bt->phase_seg1) | - BTR1_SET_TSEG2(bt->phase_seg2) | - BTR1_SET_SAM(priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)); - - netdev_info(dev, "setting BTR0=0x%02x BTR1=0x%02x\n", btr0, btr1); - - out_8(®s->canbtr0, btr0); - out_8(®s->canbtr1, btr1); - - return 0; -} - -static int mscan_get_berr_counter(const struct net_device *dev, - struct can_berr_counter *bec) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - - bec->txerr = in_8(®s->cantxerr); - bec->rxerr = in_8(®s->canrxerr); - - return 0; -} - -static int mscan_open(struct net_device *dev) -{ - int ret; - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - - /* common open */ - ret = open_candev(dev); - if (ret) - return ret; - - napi_enable(&priv->napi); - - ret = request_irq(dev->irq, mscan_isr, 0, dev->name, dev); - if (ret < 0) { - netdev_err(dev, "failed to attach interrupt\n"); - goto exit_napi_disable; - } - - priv->open_time = jiffies; - - if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) - setbits8(®s->canctl1, MSCAN_LISTEN); - else - clrbits8(®s->canctl1, MSCAN_LISTEN); - - ret = mscan_start(dev); - if (ret) - goto exit_free_irq; - - netif_start_queue(dev); - - return 0; - -exit_free_irq: - priv->open_time = 0; - free_irq(dev->irq, dev); -exit_napi_disable: - napi_disable(&priv->napi); - close_candev(dev); - return ret; -} - -static int mscan_close(struct net_device *dev) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - - netif_stop_queue(dev); - napi_disable(&priv->napi); - - out_8(®s->cantier, 0); - out_8(®s->canrier, 0); - mscan_set_mode(dev, MSCAN_INIT_MODE); - close_candev(dev); - free_irq(dev->irq, dev); - priv->open_time = 0; - - return 0; -} - -static const struct net_device_ops mscan_netdev_ops = { - .ndo_open = mscan_open, - .ndo_stop = mscan_close, - .ndo_start_xmit = mscan_start_xmit, -}; - -int register_mscandev(struct net_device *dev, int mscan_clksrc) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - u8 ctl1; - - ctl1 = in_8(®s->canctl1); - if (mscan_clksrc) - ctl1 |= MSCAN_CLKSRC; - else - ctl1 &= ~MSCAN_CLKSRC; - - if (priv->type == MSCAN_TYPE_MPC5121) { - priv->can.do_get_berr_counter = mscan_get_berr_counter; - ctl1 |= MSCAN_BORM; /* bus-off recovery upon request */ - } - - ctl1 |= MSCAN_CANE; - out_8(®s->canctl1, ctl1); - udelay(100); - - /* acceptance mask/acceptance code (accept everything) */ - out_be16(®s->canidar1_0, 0); - out_be16(®s->canidar3_2, 0); - out_be16(®s->canidar5_4, 0); - out_be16(®s->canidar7_6, 0); - - out_be16(®s->canidmr1_0, 0xffff); - out_be16(®s->canidmr3_2, 0xffff); - out_be16(®s->canidmr5_4, 0xffff); - out_be16(®s->canidmr7_6, 0xffff); - /* Two 32 bit Acceptance Filters */ - out_8(®s->canidac, MSCAN_AF_32BIT); - - mscan_set_mode(dev, MSCAN_INIT_MODE); - - return register_candev(dev); -} - -void unregister_mscandev(struct net_device *dev) -{ - struct mscan_priv *priv = netdev_priv(dev); - struct mscan_regs __iomem *regs = priv->reg_base; - mscan_set_mode(dev, MSCAN_INIT_MODE); - clrbits8(®s->canctl1, MSCAN_CANE); - unregister_candev(dev); -} - -struct net_device *alloc_mscandev(void) -{ - struct net_device *dev; - struct mscan_priv *priv; - int i; - - dev = alloc_candev(sizeof(struct mscan_priv), MSCAN_ECHO_SKB_MAX); - if (!dev) - return NULL; - priv = netdev_priv(dev); - - dev->netdev_ops = &mscan_netdev_ops; - - dev->flags |= IFF_ECHO; /* we support local echo */ - - netif_napi_add(dev, &priv->napi, mscan_rx_poll, 8); - - priv->can.bittiming_const = &mscan_bittiming_const; - priv->can.do_set_bittiming = mscan_do_set_bittiming; - priv->can.do_set_mode = mscan_do_set_mode; - priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES | - CAN_CTRLMODE_LISTENONLY; - - for (i = 0; i < TX_QUEUE_SIZE; i++) { - priv->tx_queue[i].id = i; - priv->tx_queue[i].mask = 1 << i; - } - - return dev; -} - -MODULE_AUTHOR("Andrey Volkov <avolkov@varma-el.com>"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("CAN port driver for a MSCAN based chips"); |