summaryrefslogtreecommitdiffstats
path: root/drivers/net/can
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/can')
-rw-r--r--drivers/net/can/Kconfig62
-rw-r--r--drivers/net/can/Makefile7
-rw-r--r--drivers/net/can/dev.c657
-rw-r--r--drivers/net/can/sja1000/Makefile11
-rw-r--r--drivers/net/can/sja1000/ems_pci.c320
-rw-r--r--drivers/net/can/sja1000/kvaser_pci.c412
-rw-r--r--drivers/net/can/sja1000/sja1000.c637
-rw-r--r--drivers/net/can/sja1000/sja1000.h181
-rw-r--r--drivers/net/can/sja1000/sja1000_of_platform.c235
-rw-r--r--drivers/net/can/sja1000/sja1000_platform.c165
10 files changed, 2687 insertions, 0 deletions
diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index 57def0d5737..d5e18812bf4 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -12,6 +12,68 @@ config CAN_VCAN
This driver can also be built as a module. If so, the module
will be called vcan.
+config CAN_DEV
+ tristate "Platform CAN drivers with Netlink support"
+ depends on CAN
+ default Y
+ ---help---
+ Enables the common framework for platform CAN drivers with Netlink
+ support. This is the standard library for CAN drivers.
+ If unsure, say Y.
+
+config CAN_CALC_BITTIMING
+ bool "CAN bit-timing calculation"
+ depends on CAN_DEV
+ default Y
+ ---help---
+ If enabled, CAN bit-timing parameters will be calculated for the
+ bit-rate specified via Netlink argument "bitrate" when the device
+ get started. This works fine for the most common CAN controllers
+ with standard bit-rates but may fail for exotic bit-rates or CAN
+ source clock frequencies. Disabling saves some space, but then the
+ bit-timing parameters must be specified directly using the Netlink
+ arguments "tq", "prop_seg", "phase_seg1", "phase_seg2" and "sjw".
+ If unsure, say Y.
+
+config CAN_SJA1000
+ depends on CAN_DEV
+ tristate "Philips SJA1000"
+ ---help---
+ Driver for the SJA1000 CAN controllers from Philips or NXP
+
+config CAN_SJA1000_PLATFORM
+ depends on CAN_SJA1000
+ tristate "Generic Platform Bus based SJA1000 driver"
+ ---help---
+ This driver adds support for the SJA1000 chips connected to
+ the "platform bus" (Linux abstraction for directly to the
+ processor attached devices). Which can be found on various
+ boards from Phytec (http://www.phytec.de) like the PCM027,
+ PCM038.
+
+config CAN_SJA1000_OF_PLATFORM
+ depends on CAN_SJA1000 && PPC_OF
+ tristate "Generic OF Platform Bus based SJA1000 driver"
+ ---help---
+ This driver adds support for the SJA1000 chips connected to
+ the OpenFirmware "platform bus" found on embedded systems with
+ OpenFirmware bindings, e.g. if you have a PowerPC based system
+ you may want to enable this option.
+
+config CAN_EMS_PCI
+ tristate "EMS CPC-PCI and CPC-PCIe Card"
+ depends on PCI && CAN_SJA1000
+ ---help---
+ This driver is for the one or two channel CPC-PCI and CPC-PCIe
+ cards from EMS Dr. Thomas Wuensche (http://www.ems-wuensche.de).
+
+config CAN_KVASER_PCI
+ tristate "Kvaser PCIcanx and Kvaser PCIcan PCI Cards"
+ depends on PCI && CAN_SJA1000
+ ---help---
+ This driver is for the the PCIcanx and PCIcan cards (1, 2 or
+ 4 channel) from Kvaser (http://www.kvaser.com).
+
config CAN_DEBUG_DEVICES
bool "CAN devices debugging messages"
depends on CAN
diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile
index c4bead705cd..523a941b358 100644
--- a/drivers/net/can/Makefile
+++ b/drivers/net/can/Makefile
@@ -3,3 +3,10 @@
#
obj-$(CONFIG_CAN_VCAN) += vcan.o
+
+obj-$(CONFIG_CAN_DEV) += can-dev.o
+can-dev-y := dev.o
+
+obj-$(CONFIG_CAN_SJA1000) += sja1000/
+
+ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
new file mode 100644
index 00000000000..574daddc21b
--- /dev/null
+++ b/drivers/net/can/dev.c
@@ -0,0 +1,657 @@
+/*
+ * Copyright (C) 2005 Marc Kleine-Budde, Pengutronix
+ * Copyright (C) 2006 Andrey Volkov, Varma Electronics
+ * Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/can/netlink.h>
+#include <net/rtnetlink.h>
+
+#define MOD_DESC "CAN device driver interface"
+
+MODULE_DESCRIPTION(MOD_DESC);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
+
+#ifdef CONFIG_CAN_CALC_BITTIMING
+#define CAN_CALC_MAX_ERROR 50 /* in one-tenth of a percent */
+
+/*
+ * Bit-timing calculation derived from:
+ *
+ * Code based on LinCAN sources and H8S2638 project
+ * Copyright 2004-2006 Pavel Pisa - DCE FELK CVUT cz
+ * Copyright 2005 Stanislav Marek
+ * email: pisa@cmp.felk.cvut.cz
+ *
+ * Calculates proper bit-timing parameters for a specified bit-rate
+ * and sample-point, which can then be used to set the bit-timing
+ * registers of the CAN controller. You can find more information
+ * in the header file linux/can/netlink.h.
+ */
+static int can_update_spt(const struct can_bittiming_const *btc,
+ int sampl_pt, int tseg, int *tseg1, int *tseg2)
+{
+ *tseg2 = tseg + 1 - (sampl_pt * (tseg + 1)) / 1000;
+ if (*tseg2 < btc->tseg2_min)
+ *tseg2 = btc->tseg2_min;
+ if (*tseg2 > btc->tseg2_max)
+ *tseg2 = btc->tseg2_max;
+ *tseg1 = tseg - *tseg2;
+ if (*tseg1 > btc->tseg1_max) {
+ *tseg1 = btc->tseg1_max;
+ *tseg2 = tseg - *tseg1;
+ }
+ return 1000 * (tseg + 1 - *tseg2) / (tseg + 1);
+}
+
+static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt)
+{
+ struct can_priv *priv = netdev_priv(dev);
+ const struct can_bittiming_const *btc = priv->bittiming_const;
+ long rate, best_rate = 0;
+ long best_error = 1000000000, error = 0;
+ int best_tseg = 0, best_brp = 0, brp = 0;
+ int tsegall, tseg = 0, tseg1 = 0, tseg2 = 0;
+ int spt_error = 1000, spt = 0, sampl_pt;
+ u64 v64;
+
+ if (!priv->bittiming_const)
+ return -ENOTSUPP;
+
+ /* Use CIA recommended sample points */
+ if (bt->sample_point) {
+ sampl_pt = bt->sample_point;
+ } else {
+ if (bt->bitrate > 800000)
+ sampl_pt = 750;
+ else if (bt->bitrate > 500000)
+ sampl_pt = 800;
+ else
+ sampl_pt = 875;
+ }
+
+ /* tseg even = round down, odd = round up */
+ for (tseg = (btc->tseg1_max + btc->tseg2_max) * 2 + 1;
+ tseg >= (btc->tseg1_min + btc->tseg2_min) * 2; tseg--) {
+ tsegall = 1 + tseg / 2;
+ /* Compute all possible tseg choices (tseg=tseg1+tseg2) */
+ brp = priv->clock.freq / (tsegall * bt->bitrate) + tseg % 2;
+ /* chose brp step which is possible in system */
+ brp = (brp / btc->brp_inc) * btc->brp_inc;
+ if ((brp < btc->brp_min) || (brp > btc->brp_max))
+ continue;
+ rate = priv->clock.freq / (brp * tsegall);
+ error = bt->bitrate - rate;
+ /* tseg brp biterror */
+ if (error < 0)
+ error = -error;
+ if (error > best_error)
+ continue;
+ best_error = error;
+ if (error == 0) {
+ spt = can_update_spt(btc, sampl_pt, tseg / 2,
+ &tseg1, &tseg2);
+ error = sampl_pt - spt;
+ if (error < 0)
+ error = -error;
+ if (error > spt_error)
+ continue;
+ spt_error = error;
+ }
+ best_tseg = tseg / 2;
+ best_brp = brp;
+ best_rate = rate;
+ if (error == 0)
+ break;
+ }
+
+ if (best_error) {
+ /* Error in one-tenth of a percent */
+ error = (best_error * 1000) / bt->bitrate;
+ if (error > CAN_CALC_MAX_ERROR) {
+ dev_err(dev->dev.parent,
+ "bitrate error %ld.%ld%% too high\n",
+ error / 10, error % 10);
+ return -EDOM;
+ } else {
+ dev_warn(dev->dev.parent, "bitrate error %ld.%ld%%\n",
+ error / 10, error % 10);
+ }
+ }
+
+ /* real sample point */
+ bt->sample_point = can_update_spt(btc, sampl_pt, best_tseg,
+ &tseg1, &tseg2);
+
+ v64 = (u64)best_brp * 1000000000UL;
+ do_div(v64, priv->clock.freq);
+ bt->tq = (u32)v64;
+ bt->prop_seg = tseg1 / 2;
+ bt->phase_seg1 = tseg1 - bt->prop_seg;
+ bt->phase_seg2 = tseg2;
+ bt->sjw = 1;
+ bt->brp = best_brp;
+ /* real bit-rate */
+ bt->bitrate = priv->clock.freq / (bt->brp * (tseg1 + tseg2 + 1));
+
+ return 0;
+}
+#else /* !CONFIG_CAN_CALC_BITTIMING */
+static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt)
+{
+ dev_err(dev->dev.parent, "bit-timing calculation not available\n");
+ return -EINVAL;
+}
+#endif /* CONFIG_CAN_CALC_BITTIMING */
+
+/*
+ * Checks the validity of the specified bit-timing parameters prop_seg,
+ * phase_seg1, phase_seg2 and sjw and tries to determine the bitrate
+ * prescaler value brp. You can find more information in the header
+ * file linux/can/netlink.h.
+ */
+static int can_fixup_bittiming(struct net_device *dev, struct can_bittiming *bt)
+{
+ struct can_priv *priv = netdev_priv(dev);
+ const struct can_bittiming_const *btc = priv->bittiming_const;
+ int tseg1, alltseg;
+ u64 brp64;
+
+ if (!priv->bittiming_const)
+ return -ENOTSUPP;
+
+ tseg1 = bt->prop_seg + bt->phase_seg1;
+ if (!bt->sjw)
+ bt->sjw = 1;
+ if (bt->sjw > btc->sjw_max ||
+ tseg1 < btc->tseg1_min || tseg1 > btc->tseg1_max ||
+ bt->phase_seg2 < btc->tseg2_min || bt->phase_seg2 > btc->tseg2_max)
+ return -ERANGE;
+
+ brp64 = (u64)priv->clock.freq * (u64)bt->tq;
+ if (btc->brp_inc > 1)
+ do_div(brp64, btc->brp_inc);
+ brp64 += 500000000UL - 1;
+ do_div(brp64, 1000000000UL); /* the practicable BRP */
+ if (btc->brp_inc > 1)
+ brp64 *= btc->brp_inc;
+ bt->brp = (u32)brp64;
+
+ if (bt->brp < btc->brp_min || bt->brp > btc->brp_max)
+ return -EINVAL;
+
+ alltseg = bt->prop_seg + bt->phase_seg1 + bt->phase_seg2 + 1;
+ bt->bitrate = priv->clock.freq / (bt->brp * alltseg);
+ bt->sample_point = ((tseg1 + 1) * 1000) / alltseg;
+
+ return 0;
+}
+
+int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt)
+{
+ struct can_priv *priv = netdev_priv(dev);
+ int err;
+
+ /* Check if the CAN device has bit-timing parameters */
+ if (priv->bittiming_const) {
+
+ /* Non-expert mode? Check if the bitrate has been pre-defined */
+ if (!bt->tq)
+ /* Determine bit-timing parameters */
+ err = can_calc_bittiming(dev, bt);
+ else
+ /* Check bit-timing params and calculate proper brp */
+ err = can_fixup_bittiming(dev, bt);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/*
+ * Local echo of CAN messages
+ *
+ * CAN network devices *should* support a local echo functionality
+ * (see Documentation/networking/can.txt). To test the handling of CAN
+ * interfaces that do not support the local echo both driver types are
+ * implemented. In the case that the driver does not support the echo
+ * the IFF_ECHO remains clear in dev->flags. This causes the PF_CAN core
+ * to perform the echo as a fallback solution.
+ */
+static void can_flush_echo_skb(struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+ struct net_device_stats *stats = &dev->stats;
+ int i;
+
+ for (i = 0; i < CAN_ECHO_SKB_MAX; i++) {
+ if (priv->echo_skb[i]) {
+ kfree_skb(priv->echo_skb[i]);
+ priv->echo_skb[i] = NULL;
+ stats->tx_dropped++;
+ stats->tx_aborted_errors++;
+ }
+ }
+}
+
+/*
+ * Put the skb on the stack to be looped backed locally lateron
+ *
+ * The function is typically called in the start_xmit function
+ * of the device driver. The driver must protect access to
+ * priv->echo_skb, if necessary.
+ */
+void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, int idx)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ /* check flag whether this packet has to be looped back */
+ if (!(dev->flags & IFF_ECHO) || skb->pkt_type != PACKET_LOOPBACK) {
+ kfree_skb(skb);
+ return;
+ }
+
+ if (!priv->echo_skb[idx]) {
+ struct sock *srcsk = skb->sk;
+
+ if (atomic_read(&skb->users) != 1) {
+ struct sk_buff *old_skb = skb;
+
+ skb = skb_clone(old_skb, GFP_ATOMIC);
+ kfree_skb(old_skb);
+ if (!skb)
+ return;
+ } else
+ skb_orphan(skb);
+
+ skb->sk = srcsk;
+
+ /* make settings for echo to reduce code in irq context */
+ skb->protocol = htons(ETH_P_CAN);
+ skb->pkt_type = PACKET_BROADCAST;
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb->dev = dev;
+
+ /* save this skb for tx interrupt echo handling */
+ priv->echo_skb[idx] = skb;
+ } else {
+ /* locking problem with netif_stop_queue() ?? */
+ dev_err(dev->dev.parent, "%s: BUG! echo_skb is occupied!\n",
+ __func__);
+ kfree_skb(skb);
+ }
+}
+EXPORT_SYMBOL_GPL(can_put_echo_skb);
+
+/*
+ * Get the skb from the stack and loop it back locally
+ *
+ * The function is typically called when the TX done interrupt
+ * is handled in the device driver. The driver must protect
+ * access to priv->echo_skb, if necessary.
+ */
+void can_get_echo_skb(struct net_device *dev, int idx)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ if ((dev->flags & IFF_ECHO) && priv->echo_skb[idx]) {
+ netif_rx(priv->echo_skb[idx]);
+ priv->echo_skb[idx] = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(can_get_echo_skb);
+
+/*
+ * CAN device restart for bus-off recovery
+ */
+void can_restart(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *)data;
+ struct can_priv *priv = netdev_priv(dev);
+ struct net_device_stats *stats = &dev->stats;
+ struct sk_buff *skb;
+ struct can_frame *cf;
+ int err;
+
+ BUG_ON(netif_carrier_ok(dev));
+
+ /*
+ * No synchronization needed because the device is bus-off and
+ * no messages can come in or go out.
+ */
+ can_flush_echo_skb(dev);
+
+ /* send restart message upstream */
+ skb = dev_alloc_skb(sizeof(struct can_frame));
+ if (skb == NULL) {
+ err = -ENOMEM;
+ goto out;
+ }
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_CAN);
+ cf = (struct can_frame *)skb_put(skb, sizeof(struct can_frame));
+ memset(cf, 0, sizeof(struct can_frame));
+ cf->can_id = CAN_ERR_FLAG | CAN_ERR_RESTARTED;
+ cf->can_dlc = CAN_ERR_DLC;
+
+ netif_rx(skb);
+
+ dev->last_rx = jiffies;
+ stats->rx_packets++;
+ stats->rx_bytes += cf->can_dlc;
+
+ dev_dbg(dev->dev.parent, "restarted\n");
+ priv->can_stats.restarts++;
+
+ /* Now restart the device */
+ err = priv->do_set_mode(dev, CAN_MODE_START);
+
+out:
+ netif_carrier_on(dev);
+ if (err)
+ dev_err(dev->dev.parent, "Error %d during restart", err);
+}
+
+int can_restart_now(struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ /*
+ * A manual restart is only permitted if automatic restart is
+ * disabled and the device is in the bus-off state
+ */
+ if (priv->restart_ms)
+ return -EINVAL;
+ if (priv->state != CAN_STATE_BUS_OFF)
+ return -EBUSY;
+
+ /* Runs as soon as possible in the timer context */
+ mod_timer(&priv->restart_timer, jiffies);
+
+ return 0;
+}
+
+/*
+ * CAN bus-off
+ *
+ * This functions should be called when the device goes bus-off to
+ * tell the netif layer that no more packets can be sent or received.
+ * If enabled, a timer is started to trigger bus-off recovery.
+ */
+void can_bus_off(struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ dev_dbg(dev->dev.parent, "bus-off\n");
+
+ netif_carrier_off(dev);
+ priv->can_stats.bus_off++;
+
+ if (priv->restart_ms)
+ mod_timer(&priv->restart_timer,
+ jiffies + (priv->restart_ms * HZ) / 1000);
+}
+EXPORT_SYMBOL_GPL(can_bus_off);
+
+static void can_setup(struct net_device *dev)
+{
+ dev->type = ARPHRD_CAN;
+ dev->mtu = sizeof(struct can_frame);
+ dev->hard_header_len = 0;
+ dev->addr_len = 0;
+ dev->tx_queue_len = 10;
+
+ /* New-style flags. */
+ dev->flags = IFF_NOARP;
+ dev->features = NETIF_F_NO_CSUM;
+}
+
+/*
+ * Allocate and setup space for the CAN network device
+ */
+struct net_device *alloc_candev(int sizeof_priv)
+{
+ struct net_device *dev;
+ struct can_priv *priv;
+
+ dev = alloc_netdev(sizeof_priv, "can%d", can_setup);
+ if (!dev)
+ return NULL;
+
+ priv = netdev_priv(dev);
+
+ priv->state = CAN_STATE_STOPPED;
+
+ init_timer(&priv->restart_timer);
+
+ return dev;
+}
+EXPORT_SYMBOL_GPL(alloc_candev);
+
+/*
+ * Free space of the CAN network device
+ */
+void free_candev(struct net_device *dev)
+{
+ free_netdev(dev);
+}
+EXPORT_SYMBOL_GPL(free_candev);
+
+/*
+ * Common open function when the device gets opened.
+ *
+ * This function should be called in the open function of the device
+ * driver.
+ */
+int open_candev(struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ if (!priv->bittiming.tq && !priv->bittiming.bitrate) {
+ dev_err(dev->dev.parent, "bit-timing not yet defined\n");
+ return -EINVAL;
+ }
+
+ setup_timer(&priv->restart_timer, can_restart, (unsigned long)dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(open_candev);
+
+/*
+ * Common close function for cleanup before the device gets closed.
+ *
+ * This function should be called in the close function of the device
+ * driver.
+ */
+void close_candev(struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ if (del_timer_sync(&priv->restart_timer))
+ dev_put(dev);
+ can_flush_echo_skb(dev);
+}
+EXPORT_SYMBOL_GPL(close_candev);
+
+/*
+ * CAN netlink interface
+ */
+static const struct nla_policy can_policy[IFLA_CAN_MAX + 1] = {
+ [IFLA_CAN_STATE] = { .type = NLA_U32 },
+ [IFLA_CAN_CTRLMODE] = { .len = sizeof(struct can_ctrlmode) },
+ [IFLA_CAN_RESTART_MS] = { .type = NLA_U32 },
+ [IFLA_CAN_RESTART] = { .type = NLA_U32 },
+ [IFLA_CAN_BITTIMING] = { .len = sizeof(struct can_bittiming) },
+ [IFLA_CAN_BITTIMING_CONST]
+ = { .len = sizeof(struct can_bittiming_const) },
+ [IFLA_CAN_CLOCK] = { .len = sizeof(struct can_clock) },
+};
+
+static int can_changelink(struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct can_priv *priv = netdev_priv(dev);
+ int err;
+
+ /* We need synchronization with dev->stop() */
+ ASSERT_RTNL();
+
+ if (data[IFLA_CAN_CTRLMODE]) {
+ struct can_ctrlmode *cm;
+
+ /* Do not allow changing controller mode while running */
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+ cm = nla_data(data[IFLA_CAN_CTRLMODE]);
+ priv->ctrlmode &= ~cm->mask;
+ priv->ctrlmode |= cm->flags;
+ }
+
+ if (data[IFLA_CAN_BITTIMING]) {
+ struct can_bittiming bt;
+
+ /* Do not allow changing bittiming while running */
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+ memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
+ if ((!bt.bitrate && !bt.tq) || (bt.bitrate && bt.tq))
+ return -EINVAL;
+ err = can_get_bittiming(dev, &bt);
+ if (err)
+ return err;
+ memcpy(&priv->bittiming, &bt, sizeof(bt));
+
+ if (priv->do_set_bittiming) {
+ /* Finally, set the bit-timing registers */
+ err = priv->do_set_bittiming(dev);
+ if (err)
+ return err;
+ }
+ }
+
+ if (data[IFLA_CAN_RESTART_MS]) {
+ /* Do not allow changing restart delay while running */
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+ priv->restart_ms = nla_get_u32(data[IFLA_CAN_RESTART_MS]);
+ }
+
+ if (data[IFLA_CAN_RESTART]) {
+ /* Do not allow a restart while not running */
+ if (!(dev->flags & IFF_UP))
+ return -EINVAL;
+ err = can_restart_now(dev);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+ struct can_ctrlmode cm = {.flags = priv->ctrlmode};
+ enum can_state state = priv->state;
+
+ if (priv->do_get_state)
+ priv->do_get_state(dev, &state);
+ NLA_PUT_U32(skb, IFLA_CAN_STATE, state);
+ NLA_PUT(skb, IFLA_CAN_CTRLMODE, sizeof(cm), &cm);
+ NLA_PUT_U32(skb, IFLA_CAN_RESTART_MS, priv->restart_ms);
+ NLA_PUT(skb, IFLA_CAN_BITTIMING,
+ sizeof(priv->bittiming), &priv->bittiming);
+ NLA_PUT(skb, IFLA_CAN_CLOCK, sizeof(cm), &priv->clock);
+ if (priv->bittiming_const)
+ NLA_PUT(skb, IFLA_CAN_BITTIMING_CONST,
+ sizeof(*priv->bittiming_const), priv->bittiming_const);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int can_fill_xstats(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct can_priv *priv = netdev_priv(dev);
+
+ NLA_PUT(skb, IFLA_INFO_XSTATS,
+ sizeof(priv->can_stats), &priv->can_stats);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static struct rtnl_link_ops can_link_ops __read_mostly = {
+ .kind = "can",
+ .maxtype = IFLA_CAN_MAX,
+ .policy = can_policy,
+ .setup = can_setup,
+ .changelink = can_changelink,
+ .fill_info = can_fill_info,
+ .fill_xstats = can_fill_xstats,
+};
+
+/*
+ * Register the CAN network device
+ */
+int register_candev(struct net_device *dev)
+{
+ dev->rtnl_link_ops = &can_link_ops;
+ return register_netdev(dev);
+}
+EXPORT_SYMBOL_GPL(register_candev);
+
+/*
+ * Unregister the CAN network device
+ */
+void unregister_candev(struct net_device *dev)
+{
+ unregister_netdev(dev);
+}
+EXPORT_SYMBOL_GPL(unregister_candev);
+
+static __init int can_dev_init(void)
+{
+ int err;
+
+ err = rtnl_link_register(&can_link_ops);
+ if (!err)
+ printk(KERN_INFO MOD_DESC "\n");
+
+ return err;
+}
+module_init(can_dev_init);
+
+static __exit void can_dev_exit(void)
+{
+ rtnl_link_unregister(&can_link_ops);
+}
+module_exit(can_dev_exit);
+
+MODULE_ALIAS_RTNL_LINK("can");
diff --git a/drivers/net/can/sja1000/Makefile b/drivers/net/can/sja1000/Makefile
new file mode 100644
index 00000000000..9d0c08da273
--- /dev/null
+++ b/drivers/net/can/sja1000/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for the SJA1000 CAN controller drivers.
+#
+
+obj-$(CONFIG_CAN_SJA1000) += sja1000.o
+obj-$(CONFIG_CAN_SJA1000_PLATFORM) += sja1000_platform.o
+obj-$(CONFIG_CAN_SJA1000_OF_PLATFORM) += sja1000_of_platform.o
+obj-$(CONFIG_CAN_EMS_PCI) += ems_pci.o
+obj-$(CONFIG_CAN_KVASER_PCI) += kvaser_pci.o
+
+ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c
new file mode 100644
index 00000000000..121b64101d7
--- /dev/null
+++ b/drivers/net/can/sja1000/ems_pci.c
@@ -0,0 +1,320 @@
+/*
+ * Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
+ * Copyright (C) 2008 Markus Plessing <plessing@ems-wuensche.com>
+ * Copyright (C) 2008 Sebastian Haas <haas@ems-wuensche.com>
+ *
+ * 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/netdevice.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/io.h>
+
+#include "sja1000.h"
+
+#define DRV_NAME "ems_pci"
+
+MODULE_AUTHOR("Sebastian Haas <haas@ems-wuenche.com>");
+MODULE_DESCRIPTION("Socket-CAN driver for EMS CPC-PCI/PCIe CAN cards");
+MODULE_SUPPORTED_DEVICE("EMS CPC-PCI/PCIe CAN card");
+MODULE_LICENSE("GPL v2");
+
+#define EMS_PCI_MAX_CHAN 2
+
+struct ems_pci_card {
+ int channels;
+
+ struct pci_dev *pci_dev;
+ struct net_device *net_dev[EMS_PCI_MAX_CHAN];
+
+ void __iomem *conf_addr;
+ void __iomem *base_addr;
+};
+
+#define EMS_PCI_CAN_CLOCK (16000000 / 2)
+
+/*
+ * Register definitions and descriptions are from LinCAN 0.3.3.
+ *
+ * PSB4610 PITA-2 bridge control registers
+ */
+#define PITA2_ICR 0x00 /* Interrupt Control Register */
+#define PITA2_ICR_INT0 0x00000002 /* [RC] INT0 Active/Clear */
+#define PITA2_ICR_INT0_EN 0x00020000 /* [RW] Enable INT0 */
+
+#define PITA2_MISC 0x1c /* Miscellaneous Register */
+#define PITA2_MISC_CONFIG 0x04000000 /* Multiplexed parallel interface */
+
+/*
+ * The board configuration is probably following:
+ * RX1 is connected to ground.
+ * TX1 is not connected.
+ * CLKO is not connected.
+ * Setting the OCR register to 0xDA is a good idea.
+ * This means normal output mode , push-pull and the correct polarity.
+ */
+#define EMS_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
+
+/*
+ * In the CDR register, you should set CBP to 1.
+ * You will probably also want to set the clock divider value to 7
+ * (meaning direct oscillator output) because the second SJA1000 chip
+ * is driven by the first one CLKOUT output.
+ */
+#define EMS_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
+#define EMS_PCI_MEM_SIZE 4096 /* Size of the remapped io-memory */
+#define EMS_PCI_CAN_BASE_OFFSET 0x400 /* offset where the controllers starts */
+#define EMS_PCI_CAN_CTRL_SIZE 0x200 /* memory size for each controller */
+
+#define EMS_PCI_PORT_BYTES 0x4 /* Each register occupies 4 bytes */
+
+#define EMS_PCI_VENDOR_ID 0x110a /* PCI device and vendor ID */
+#define EMS_PCI_DEVICE_ID 0x2104
+
+static struct pci_device_id ems_pci_tbl[] = {
+ {EMS_PCI_VENDOR_ID, EMS_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+ {0,}
+};
+MODULE_DEVICE_TABLE(pci, ems_pci_tbl);
+
+/*
+ * Helper to read internal registers from card logic (not CAN)
+ */
+static u8 ems_pci_readb(struct ems_pci_card *card, unsigned int port)
+{
+ return readb(card->base_addr + (port * EMS_PCI_PORT_BYTES));
+}
+
+static u8 ems_pci_read_reg(const struct sja1000_priv *priv, int port)
+{
+ return readb(priv->reg_base + (port * EMS_PCI_PORT_BYTES));
+}
+
+static void ems_pci_write_reg(const struct sja1000_priv *priv, int port, u8 val)
+{
+ writeb(val, priv->reg_base + (port * EMS_PCI_PORT_BYTES));
+}
+
+static void ems_pci_post_irq(const struct sja1000_priv *priv)
+{
+ struct ems_pci_card *card = (struct ems_pci_card *)priv->priv;
+
+ /* reset int flag of pita */
+ writel(PITA2_ICR_INT0_EN | PITA2_ICR_INT0, card->conf_addr
+ + PITA2_ICR);
+}
+
+/*
+ * Check if a CAN controller is present at the specified location
+ * by trying to set 'em into the PeliCAN mode
+ */
+static inline int ems_pci_check_chan(const struct sja1000_priv *priv)
+{
+ unsigned char res;
+
+ /* Make sure SJA1000 is in reset mode */
+ ems_pci_write_reg(priv, REG_MOD, 1);
+
+ ems_pci_write_reg(priv, REG_CDR, CDR_PELICAN);
+
+ /* read reset-values */
+ res = ems_pci_read_reg(priv, REG_CDR);
+
+ if (res == CDR_PELICAN)
+ return 1;
+
+ return 0;
+}
+
+static void ems_pci_del_card(struct pci_dev *pdev)
+{
+ struct ems_pci_card *card = pci_get_drvdata(pdev);
+ struct net_device *dev;
+ int i = 0;
+
+ for (i = 0; i < card->channels; i++) {
+ dev = card->net_dev[i];
+
+ if (!dev)
+ continue;
+
+ dev_info(&pdev->dev, "Removing %s.\n", dev->name);
+ unregister_sja1000dev(dev);
+ free_sja1000dev(dev);
+ }
+
+ if (card->base_addr != NULL)
+ pci_iounmap(card->pci_dev, card->base_addr);
+
+ if (card->conf_addr != NULL)
+ pci_iounmap(card->pci_dev, card->conf_addr);
+
+ kfree(card);
+
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+}
+
+static void ems_pci_card_reset(struct ems_pci_card *card)
+{
+ /* Request board reset */
+ writeb(0, card->base_addr);
+}
+
+/*
+ * Probe PCI device for EMS CAN signature and register each available
+ * CAN channel to SJA1000 Socket-CAN subsystem.
+ */
+static int __devinit ems_pci_add_card(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct sja1000_priv *priv;
+ struct net_device *dev;
+ struct ems_pci_card *card;
+ int err, i;
+
+ /* Enabling PCI device */
+ if (pci_enable_device(pdev) < 0) {
+ dev_err(&pdev->dev, "Enabling PCI device failed\n");
+ return -ENODEV;
+ }
+
+ /* Allocating card structures to hold addresses, ... */
+ card = kzalloc(sizeof(struct ems_pci_card), GFP_KERNEL);
+ if (card == NULL) {
+ dev_err(&pdev->dev, "Unable to allocate memory\n");
+ pci_disable_device(pdev);
+ return -ENOMEM;
+ }
+
+ pci_set_drvdata(pdev, card);
+
+ card->pci_dev = pdev;
+
+ card->channels = 0;
+
+ /* Remap PITA configuration space, and controller memory area */
+ card->conf_addr = pci_iomap(pdev, 0, EMS_PCI_MEM_SIZE);
+ if (card->conf_addr == NULL) {
+ err = -ENOMEM;
+ goto failure_cleanup;
+ }
+
+ card->base_addr = pci_iomap(pdev, 1, EMS_PCI_MEM_SIZE);
+ if (card->base_addr == NULL) {
+ err = -ENOMEM;
+ goto failure_cleanup;
+ }
+
+ /* Configure PITA-2 parallel interface (enable MUX) */
+ writel(PITA2_MISC_CONFIG, card->conf_addr + PITA2_MISC);
+
+ /* Check for unique EMS CAN signature */
+ if (ems_pci_readb(card, 0) != 0x55 ||
+ ems_pci_readb(card, 1) != 0xAA ||
+ ems_pci_readb(card, 2) != 0x01 ||
+ ems_pci_readb(card, 3) != 0xCB ||
+ ems_pci_readb(card, 4) != 0x11) {
+ dev_err(&pdev->dev, "Not EMS Dr. Thomas Wuensche interface\n");
+ err = -ENODEV;
+ goto failure_cleanup;
+ }
+
+ ems_pci_card_reset(card);
+
+ /* Detect available channels */
+ for (i = 0; i < EMS_PCI_MAX_CHAN; i++) {
+ dev = alloc_sja1000dev(0);
+ if (dev == NULL) {
+ err = -ENOMEM;
+ goto failure_cleanup;
+ }
+
+ card->net_dev[i] = dev;
+ priv = netdev_priv(dev);
+ priv->priv = card;
+ priv->irq_flags = IRQF_SHARED;
+
+ dev->irq = pdev->irq;
+ priv->reg_base = card->base_addr + EMS_PCI_CAN_BASE_OFFSET
+ + (i * EMS_PCI_CAN_CTRL_SIZE);
+
+ /* Check if channel is present */
+ if (ems_pci_check_chan(priv)) {
+ priv->read_reg = ems_pci_read_reg;
+ priv->write_reg = ems_pci_write_reg;
+ priv->post_irq = ems_pci_post_irq;
+ priv->can.clock.freq = EMS_PCI_CAN_CLOCK;
+ priv->ocr = EMS_PCI_OCR;
+ priv->cdr = EMS_PCI_CDR;
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ /* Enable interrupts from card */
+ writel(PITA2_ICR_INT0_EN, card->conf_addr + PITA2_ICR);
+
+ /* Register SJA1000 device */
+ err = register_sja1000dev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "Registering device failed "
+ "(err=%d)\n", err);
+ free_sja1000dev(dev);
+ goto failure_cleanup;
+ }
+
+ card->channels++;
+
+ dev_info(&pdev->dev, "Channel #%d at 0x%p, irq %d\n",
+ i + 1, priv->reg_base, dev->irq);
+ } else {
+ free_sja1000dev(dev);
+ }
+ }
+
+ return 0;
+
+failure_cleanup:
+ dev_err(&pdev->dev, "Error: %d. Cleaning Up.\n", err);
+
+ ems_pci_del_card(pdev);
+
+ return err;
+}
+
+static struct pci_driver ems_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = ems_pci_tbl,
+ .probe = ems_pci_add_card,
+ .remove = ems_pci_del_card,
+};
+
+static int __init ems_pci_init(void)
+{
+ return pci_register_driver(&ems_pci_driver);
+}
+
+static void __exit ems_pci_exit(void)
+{
+ pci_unregister_driver(&ems_pci_driver);
+}
+
+module_init(ems_pci_init);
+module_exit(ems_pci_exit);
+
diff --git a/drivers/net/can/sja1000/kvaser_pci.c b/drivers/net/can/sja1000/kvaser_pci.c
new file mode 100644
index 00000000000..7dd7769b971
--- /dev/null
+++ b/drivers/net/can/sja1000/kvaser_pci.c
@@ -0,0 +1,412 @@
+/*
+ * Copyright (C) 2008 Per Dalen <per.dalen@cnw.se>
+ *
+ * Parts of this software are based on (derived) the following:
+ *
+ * - Kvaser linux driver, version 4.72 BETA
+ * Copyright (C) 2002-2007 KVASER AB
+ *
+ * - Lincan driver, version 0.3.3, OCERA project
+ * Copyright (C) 2004 Pavel Pisa
+ * Copyright (C) 2001 Arnaud Westenberg
+ *
+ * - Socketcan SJA1000 drivers
+ * Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
+ * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
+ * Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
+ * 38106 Braunschweig, GERMANY
+ *
+ * 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/netdevice.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/io.h>
+
+#include "sja1000.h"
+
+#define DRV_NAME "kvaser_pci"
+
+MODULE_AUTHOR("Per Dalen <per.dalen@cnw.se>");
+MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
+MODULE_SUPPORTED_DEVICE("KVASER PCAN PCI CAN card");
+MODULE_LICENSE("GPL v2");
+
+#define MAX_NO_OF_CHANNELS 4 /* max no of channels on a single card */
+
+struct kvaser_pci {
+ int channel;
+ struct pci_dev *pci_dev;
+ struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
+ void __iomem *conf_addr;
+ void __iomem *res_addr;
+ int no_channels;
+ u8 xilinx_ver;
+};
+
+#define KVASER_PCI_CAN_CLOCK (16000000 / 2)
+
+/*
+ * The board configuration is probably following:
+ * RX1 is connected to ground.
+ * TX1 is not connected.
+ * CLKO is not connected.
+ * Setting the OCR register to 0xDA is a good idea.
+ * This means normal output mode , push-pull and the correct polarity.
+ */
+#define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
+
+/*
+ * In the CDR register, you should set CBP to 1.
+ * You will probably also want to set the clock divider value to 0
+ * (meaning divide-by-2), the Pelican bit, and the clock-off bit
+ * (you will have no need for CLKOUT anyway).
+ */
+#define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
+
+/*
+ * These register values are valid for revision 14 of the Xilinx logic.
+ */
+#define XILINX_VERINT 7 /* Lower nibble simulate interrupts,
+ high nibble version number. */
+
+#define XILINX_PRESUMED_VERSION 14
+
+/*
+ * Important S5920 registers
+ */
+#define S5920_INTCSR 0x38
+#define S5920_PTCR 0x60
+#define INTCSR_ADDON_INTENABLE_M 0x2000
+
+
+#define KVASER_PCI_PORT_BYTES 0x20
+
+#define PCI_CONFIG_PORT_SIZE 0x80 /* size of the config io-memory */
+#define PCI_PORT_SIZE 0x80 /* size of a channel io-memory */
+#define PCI_PORT_XILINX_SIZE 0x08 /* size of a xilinx io-memory */
+
+#define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */
+#define KVASER_PCI_DEVICE_ID1 0x8406
+
+#define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */
+#define KVASER_PCI_DEVICE_ID2 0x0008
+
+static struct pci_device_id kvaser_pci_tbl[] = {
+ {KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
+ {KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
+ { 0,}
+};
+
+MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);
+
+static u8 kvaser_pci_read_reg(const struct sja1000_priv *priv, int port)
+{
+ return ioread8(priv->reg_base + port);
+}
+
+static void kvaser_pci_write_reg(const struct sja1000_priv *priv,
+ int port, u8 val)
+{
+ iowrite8(val, priv->reg_base + port);
+}
+
+static void kvaser_pci_disable_irq(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct kvaser_pci *board = priv->priv;
+ u32 intcsr;
+
+ /* Disable interrupts from card */
+ intcsr = ioread32(board->conf_addr + S5920_INTCSR);
+ intcsr &= ~INTCSR_ADDON_INTENABLE_M;
+ iowrite32(intcsr, board->conf_addr + S5920_INTCSR);
+}
+
+static void kvaser_pci_enable_irq(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct kvaser_pci *board = priv->priv;
+ u32 tmp_en_io;
+
+ /* Enable interrupts from card */
+ tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR);
+ tmp_en_io |= INTCSR_ADDON_INTENABLE_M;
+ iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR);
+}
+
+static int number_of_sja1000_chip(void __iomem *base_addr)
+{
+ u8 status;
+ int i;
+
+ for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
+ /* reset chip */
+ iowrite8(MOD_RM, base_addr +
+ (i * KVASER_PCI_PORT_BYTES) + REG_MOD);
+ status = ioread8(base_addr +
+ (i * KVASER_PCI_PORT_BYTES) + REG_MOD);
+ /* check reset bit */
+ if (!(status & MOD_RM))
+ break;
+ }
+
+ return i;
+}
+
+static void kvaser_pci_del_chan(struct net_device *dev)
+{
+ struct sja1000_priv *priv;
+ struct kvaser_pci *board;
+ int i;
+
+ if (!dev)
+ return;
+ priv = netdev_priv(dev);
+ board = priv->priv;
+ if (!board)
+ return;
+
+ dev_info(&board->pci_dev->dev, "Removing device %s\n",
+ dev->name);
+
+ /* Disable PCI interrupts */
+ kvaser_pci_disable_irq(dev);
+
+ for (i = 0; i < board->no_channels - 1; i++) {
+ if (board->slave_dev[i]) {
+ dev_info(&board->pci_dev->dev, "Removing device %s\n",
+ board->slave_dev[i]->name);
+ unregister_sja1000dev(board->slave_dev[i]);
+ free_sja1000dev(board->slave_dev[i]);
+ }
+ }
+ unregister_sja1000dev(dev);
+
+ pci_iounmap(board->pci_dev, priv->reg_base);
+ pci_iounmap(board->pci_dev, board->conf_addr);
+ pci_iounmap(board->pci_dev, board->res_addr);
+
+ free_sja1000dev(dev);
+}
+
+static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
+ struct net_device **master_dev,
+ void __iomem *conf_addr,
+ void __iomem *res_addr,
+ void __iomem *base_addr)
+{
+ struct net_device *dev;
+ struct sja1000_priv *priv;
+ struct kvaser_pci *board;
+ int err, init_step;
+
+ dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
+ if (dev == NULL)
+ return -ENOMEM;
+
+ priv = netdev_priv(dev);
+ board = priv->priv;
+
+ board->pci_dev = pdev;
+ board->channel = channel;
+
+ /* S5920 */
+ board->conf_addr = conf_addr;
+
+ /* XILINX board wide address */
+ board->res_addr = res_addr;
+
+ if (channel == 0) {
+ board->xilinx_ver =
+ ioread8(board->res_addr + XILINX_VERINT) >> 4;
+ init_step = 2;
+
+ /* Assert PTADR# - we're in passive mode so the other bits are
+ not important */
+ iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);
+
+ /* Enable interrupts from card */
+ kvaser_pci_enable_irq(dev);
+ } else {
+ struct sja1000_priv *master_priv = netdev_priv(*master_dev);
+ struct kvaser_pci *master_board = master_priv->priv;
+ master_board->slave_dev[channel - 1] = dev;
+ master_board->no_channels = channel + 1;
+ board->xilinx_ver = master_board->xilinx_ver;
+ }
+
+ priv->reg_base = base_addr + channel * KVASER_PCI_PORT_BYTES;
+
+ priv->read_reg = kvaser_pci_read_reg;
+ priv->write_reg = kvaser_pci_write_reg;
+
+ priv->can.clock.freq = KVASER_PCI_CAN_CLOCK;
+
+ priv->ocr = KVASER_PCI_OCR;
+ priv->cdr = KVASER_PCI_CDR;
+
+ priv->irq_flags = IRQF_SHARED;
+ dev->irq = pdev->irq;
+
+ init_step = 4;
+
+ dev_info(&pdev->dev, "reg_base=%p conf_addr=%p irq=%d\n",
+ priv->reg_base, board->conf_addr, dev->irq);
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ /* Register SJA1000 device */
+ err = register_sja1000dev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "Registering device failed (err=%d)\n",
+ err);
+ goto failure;
+ }
+
+ if (channel == 0)
+ *master_dev = dev;
+
+ return 0;
+
+failure:
+ kvaser_pci_del_chan(dev);
+ return err;
+}
+
+static int __devinit kvaser_pci_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int err;
+ struct net_device *master_dev = NULL;
+ struct sja1000_priv *priv;
+ struct kvaser_pci *board;
+ int no_channels;
+ void __iomem *base_addr = NULL;
+ void __iomem *conf_addr = NULL;
+ void __iomem *res_addr = NULL;
+ int i;
+
+ dev_info(&pdev->dev, "initializing device %04x:%04x\n",
+ pdev->vendor, pdev->device);
+
+ err = pci_enable_device(pdev);
+ if (err)
+ goto failure;
+
+ err = pci_request_regions(pdev, DRV_NAME);
+ if (err)
+ goto failure_release_pci;
+
+ /* S5920 */
+ conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE);
+ if (conf_addr == NULL) {
+ err = -ENODEV;
+ goto failure_release_regions;
+ }
+
+ /* XILINX board wide address */
+ res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE);
+ if (res_addr == NULL) {
+ err = -ENOMEM;
+ goto failure_iounmap;
+ }
+
+ base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE);
+ if (base_addr == NULL) {
+ err = -ENOMEM;
+ goto failure_iounmap;
+ }
+
+ no_channels = number_of_sja1000_chip(base_addr);
+ if (no_channels == 0) {
+ err = -ENOMEM;
+ goto failure_iounmap;
+ }
+
+ for (i = 0; i < no_channels; i++) {
+ err = kvaser_pci_add_chan(pdev, i, &master_dev,
+ conf_addr, res_addr,
+ base_addr);
+ if (err)
+ goto failure_cleanup;
+ }
+
+ priv = netdev_priv(master_dev);
+ board = priv->priv;
+
+ dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n",
+ board->xilinx_ver, board->no_channels);
+
+ pci_set_drvdata(pdev, master_dev);
+ return 0;
+
+failure_cleanup:
+ kvaser_pci_del_chan(master_dev);
+
+failure_iounmap:
+ if (conf_addr != NULL)
+ pci_iounmap(pdev, conf_addr);
+ if (res_addr != NULL)
+ pci_iounmap(pdev, res_addr);
+ if (base_addr != NULL)
+ pci_iounmap(pdev, base_addr);
+
+failure_release_regions:
+ pci_release_regions(pdev);
+
+failure_release_pci:
+ pci_disable_device(pdev);
+
+failure:
+ return err;
+
+}
+
+static void __devexit kvaser_pci_remove_one(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+
+ kvaser_pci_del_chan(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+}
+
+static struct pci_driver kvaser_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = kvaser_pci_tbl,
+ .probe = kvaser_pci_init_one,
+ .remove = __devexit_p(kvaser_pci_remove_one),
+};
+
+static int __init kvaser_pci_init(void)
+{
+ return pci_register_driver(&kvaser_pci_driver);
+}
+
+static void __exit kvaser_pci_exit(void)
+{
+ pci_unregister_driver(&kvaser_pci_driver);
+}
+
+module_init(kvaser_pci_init);
+module_exit(kvaser_pci_exit);
diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
new file mode 100644
index 00000000000..571f133a8fe
--- /dev/null
+++ b/drivers/net/can/sja1000/sja1000.c
@@ -0,0 +1,637 @@
+/*
+ * 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.
+ *
+ * Send feedback to <socketcan-users@lists.berlios.de>
+ *
+ */
+
+#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/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 "sja1000.h"
+
+#define DRV_NAME "sja1000"
+
+MODULE_AUTHOR("Oliver Hartkopp <oliver.hartkopp@volkswagen.de>");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION(DRV_NAME "CAN netdevice driver");
+
+static struct can_bittiming_const sja1000_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 int sja1000_probe_chip(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+
+ if (priv->reg_base && (priv->read_reg(priv, 0) == 0xFF)) {
+ printk(KERN_INFO "%s: probing @0x%lX failed\n",
+ DRV_NAME, dev->base_addr);
+ return 0;
+ }
+ return -1;
+}
+
+static void set_reset_mode(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+ unsigned char status = priv->read_reg(priv, REG_MOD);
+ int i;
+
+ /* disable interrupts */
+ priv->write_reg(priv, REG_IER, IRQ_OFF);
+
+ for (i = 0; i < 100; i++) {
+ /* check reset bit */
+ if (status & MOD_RM) {
+ priv->can.state = CAN_STATE_STOPPED;
+ return;
+ }
+
+ priv->write_reg(priv, REG_MOD, MOD_RM); /* reset chip */
+ udelay(10);
+ status = priv->read_reg(priv, REG_MOD);
+ }
+
+ dev_err(dev->dev.parent, "setting SJA1000 into reset mode failed!\n");
+}
+
+static void set_normal_mode(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+ unsigned char status = priv->read_reg(priv, REG_MOD);
+ int i;
+
+ for (i = 0; i < 100; i++) {
+ /* check reset bit */
+ if ((status & MOD_RM) == 0) {
+ priv->can.state = CAN_STATE_ERROR_ACTIVE;
+ /* enable all interrupts */
+ priv->write_reg(priv, REG_IER, IRQ_ALL);
+ return;
+ }
+
+ /* set chip to normal mode */
+ priv->write_reg(priv, REG_MOD, 0x00);
+ udelay(10);
+ status = priv->read_reg(priv, REG_MOD);
+ }
+
+ dev_err(dev->dev.parent, "setting SJA1000 into normal mode failed!\n");
+}
+
+static void sja1000_start(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+
+ /* leave reset mode */
+ if (priv->can.state != CAN_STATE_STOPPED)
+ set_reset_mode(dev);
+
+ /* Clear error counters and error code capture */
+ priv->write_reg(priv, REG_TXERR, 0x0);
+ priv->write_reg(priv, REG_RXERR, 0x0);
+ priv->read_reg(priv, REG_ECC);
+
+ /* leave reset mode */
+ set_normal_mode(dev);
+}
+
+static int sja1000_set_mode(struct net_device *dev, enum can_mode mode)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+
+ if (!priv->open_time)
+ return -EINVAL;
+
+ switch (mode) {
+ case CAN_MODE_START:
+ sja1000_start(dev);
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int sja1000_set_bittiming(struct net_device *dev)
+{
+ struct sja1000_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;
+
+ dev_info(dev->dev.parent,
+ "setting BTR0=0x%02x BTR1=0x%02x\n", btr0, btr1);
+
+ priv->write_reg(priv, REG_BTR0, btr0);
+ priv->write_reg(priv, REG_BTR1, btr1);
+
+ return 0;
+}
+
+/*
+ * initialize SJA1000 chip:
+ * - reset chip
+ * - set output mode
+ * - set baudrate
+ * - enable interrupts
+ * - start operating mode
+ */
+static void chipset_init(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+
+ /* set clock divider and output control register */
+ priv->write_reg(priv, REG_CDR, priv->cdr | CDR_PELICAN);
+
+ /* set acceptance filter (accept all) */
+ priv->write_reg(priv, REG_ACCC0, 0x00);
+ priv->write_reg(priv, REG_ACCC1, 0x00);
+ priv->write_reg(priv, REG_ACCC2, 0x00);
+ priv->write_reg(priv, REG_ACCC3, 0x00);
+
+ priv->write_reg(priv, REG_ACCM0, 0xFF);
+ priv->write_reg(priv, REG_ACCM1, 0xFF);
+ priv->write_reg(priv, REG_ACCM2, 0xFF);
+ priv->write_reg(priv, REG_ACCM3, 0xFF);
+
+ priv->write_reg(priv, REG_OCR, priv->ocr | OCR_MODE_NORMAL);
+}
+
+/*
+ * 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 int sja1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct net_device_stats *stats = &dev->stats;
+ struct can_frame *cf = (struct can_frame *)skb->data;
+ uint8_t fi;
+ uint8_t dlc;
+ canid_t id;
+ uint8_t dreg;
+ int i;
+
+ netif_stop_queue(dev);
+
+ fi = dlc = cf->can_dlc;
+ id = cf->can_id;
+
+ if (id & CAN_RTR_FLAG)
+ fi |= FI_RTR;
+
+ if (id & CAN_EFF_FLAG) {
+ fi |= FI_FF;
+ dreg = EFF_BUF;
+ priv->write_reg(priv, REG_FI, fi);
+ priv->write_reg(priv, REG_ID1, (id & 0x1fe00000) >> (5 + 16));
+ priv->write_reg(priv, REG_ID2, (id & 0x001fe000) >> (5 + 8));
+ priv->write_reg(priv, REG_ID3, (id & 0x00001fe0) >> 5);
+ priv->write_reg(priv, REG_ID4, (id & 0x0000001f) << 3);
+ } else {
+ dreg = SFF_BUF;
+ priv->write_reg(priv, REG_FI, fi);
+ priv->write_reg(priv, REG_ID1, (id & 0x000007f8) >> 3);
+ priv->write_reg(priv, REG_ID2, (id & 0x00000007) << 5);
+ }
+
+ for (i = 0; i < dlc; i++)
+ priv->write_reg(priv, dreg++, cf->data[i]);
+
+ stats->tx_bytes += dlc;
+ dev->trans_start = jiffies;
+
+ can_put_echo_skb(skb, dev, 0);
+
+ priv->write_reg(priv, REG_CMR, CMD_TR);
+
+ return 0;
+}
+
+static void sja1000_rx(struct net_device *dev)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct net_device_stats *stats = &dev->stats;
+ struct can_frame *cf;
+ struct sk_buff *skb;
+ uint8_t fi;
+ uint8_t dreg;
+ canid_t id;
+ uint8_t dlc;
+ int i;
+
+ skb = dev_alloc_skb(sizeof(struct can_frame));
+ if (skb == NULL)
+ return;
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_CAN);
+
+ fi = priv->read_reg(priv, REG_FI);
+ dlc = fi & 0x0F;
+
+ if (fi & FI_FF) {
+ /* extended frame format (EFF) */
+ dreg = EFF_BUF;
+ id = (priv->read_reg(priv, REG_ID1) << (5 + 16))
+ | (priv->read_reg(priv, REG_ID2) << (5 + 8))
+ | (priv->read_reg(priv, REG_ID3) << 5)
+ | (priv->read_reg(priv, REG_ID4) >> 3);
+ id |= CAN_EFF_FLAG;
+ } else {
+ /* standard frame format (SFF) */
+ dreg = SFF_BUF;
+ id = (priv->read_reg(priv, REG_ID1) << 3)
+ | (priv->read_reg(priv, REG_ID2) >> 5);
+ }
+
+ if (fi & FI_RTR)
+ id |= CAN_RTR_FLAG;
+
+ cf = (struct can_frame *)skb_put(skb, sizeof(struct can_frame));
+ memset(cf, 0, sizeof(struct can_frame));
+ cf->can_id = id;
+ cf->can_dlc = dlc;
+ for (i = 0; i < dlc; i++)
+ cf->data[i] = priv->read_reg(priv, dreg++);
+
+ while (i < 8)
+ cf->data[i++] = 0;
+
+ /* release receive buffer */
+ priv->write_reg(priv, REG_CMR, CMD_RRB);
+
+ netif_rx(skb);
+
+ dev->last_rx = jiffies;
+ stats->rx_packets++;
+ stats->rx_bytes += dlc;
+}
+
+static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct net_device_stats *stats = &dev->stats;
+ struct can_frame *cf;
+ struct sk_buff *skb;
+ enum can_state state = priv->can.state;
+ uint8_t ecc, alc;
+
+ skb = dev_alloc_skb(sizeof(struct can_frame));
+ if (skb == NULL)
+ return -ENOMEM;
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_CAN);
+ cf = (struct can_frame *)skb_put(skb, sizeof(struct can_frame));
+ memset(cf, 0, sizeof(struct can_frame));
+ cf->can_id = CAN_ERR_FLAG;
+ cf->can_dlc = CAN_ERR_DLC;
+
+ if (isrc & IRQ_DOI) {
+ /* data overrun interrupt */
+ dev_dbg(dev->dev.parent, "data overrun interrupt\n");
+ cf->can_id |= CAN_ERR_CRTL;
+ cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
+ stats->rx_over_errors++;
+ stats->rx_errors++;
+ priv->write_reg(priv, REG_CMR, CMD_CDO); /* clear bit */
+ }
+
+ if (isrc & IRQ_EI) {
+ /* error warning interrupt */
+ dev_dbg(dev->dev.parent, "error warning interrupt\n");
+
+ if (status & SR_BS) {
+ state = CAN_STATE_BUS_OFF;
+ cf->can_id |= CAN_ERR_BUSOFF;
+ can_bus_off(dev);
+ } else if (status & SR_ES) {
+ state = CAN_STATE_ERROR_WARNING;
+ } else
+ state = CAN_STATE_ERROR_ACTIVE;
+ }
+ if (isrc & IRQ_BEI) {
+ /* bus error interrupt */
+ priv->can.can_stats.bus_error++;
+ stats->rx_errors++;
+
+ ecc = priv->read_reg(priv, REG_ECC);
+
+ cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
+
+ switch (ecc & ECC_MASK) {
+ case ECC_BIT:
+ cf->data[2] |= CAN_ERR_PROT_BIT;
+ break;
+ case ECC_FORM:
+ cf->data[2] |= CAN_ERR_PROT_FORM;
+ break;
+ case ECC_STUFF:
+ cf->data[2] |= CAN_ERR_PROT_STUFF;
+ break;
+ default:
+ cf->data[2] |= CAN_ERR_PROT_UNSPEC;
+ cf->data[3] = ecc & ECC_SEG;
+ break;
+ }
+ /* Error occured during transmission? */
+ if ((ecc & ECC_DIR) == 0)
+ cf->data[2] |= CAN_ERR_PROT_TX;
+ }
+ if (isrc & IRQ_EPI) {
+ /* error passive interrupt */
+ dev_dbg(dev->dev.parent, "error passive interrupt\n");
+ if (status & SR_ES)
+ state = CAN_STATE_ERROR_PASSIVE;
+ else
+ state = CAN_STATE_ERROR_ACTIVE;
+ }
+ if (isrc & IRQ_ALI) {
+ /* arbitration lost interrupt */
+ dev_dbg(dev->dev.parent, "arbitration lost interrupt\n");
+ alc = priv->read_reg(priv, REG_ALC);
+ priv->can.can_stats.arbitration_lost++;
+ stats->rx_errors++;
+ cf->can_id |= CAN_ERR_LOSTARB;
+ cf->data[0] = alc & 0x1f;
+ }
+
+ if (state != priv->can.state && (state == CAN_STATE_ERROR_WARNING ||
+ state == CAN_STATE_ERROR_PASSIVE)) {
+ uint8_t rxerr = priv->read_reg(priv, REG_RXERR);
+ uint8_t txerr = priv->read_reg(priv, REG_TXERR);
+ cf->can_id |= CAN_ERR_CRTL;
+ if (state == CAN_STATE_ERROR_WARNING) {
+ priv->can.can_stats.error_warning++;
+ cf->data[1] = (txerr > rxerr) ?
+ CAN_ERR_CRTL_TX_WARNING :
+ CAN_ERR_CRTL_RX_WARNING;
+ } else {
+ priv->can.can_stats.error_passive++;
+ cf->data[1] = (txerr > rxerr) ?
+ CAN_ERR_CRTL_TX_PASSIVE :
+ CAN_ERR_CRTL_RX_PASSIVE;
+ }
+ }
+
+ priv->can.state = state;
+
+ netif_rx(skb);
+
+ dev->last_rx = jiffies;
+ stats->rx_packets++;
+ stats->rx_bytes += cf->can_dlc;
+
+ 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;
+
+ /* Shared interrupts and IRQ off? */
+ if (priv->read_reg(priv, REG_IER) == IRQ_OFF)
+ return IRQ_NONE;
+
+ if (priv->pre_irq)
+ priv->pre_irq(priv);
+
+ while ((isrc = priv->read_reg(priv, REG_IR)) && (n < SJA1000_MAX_IRQ)) {
+ n++;
+ status = priv->read_reg(priv, REG_SR);
+
+ if (isrc & IRQ_WUI)
+ dev_warn(dev->dev.parent, "wakeup interrupt\n");
+
+ if (isrc & IRQ_TI) {
+ /* transmission complete interrupt */
+ stats->tx_packets++;
+ can_get_echo_skb(dev, 0);
+ netif_wake_queue(dev);
+ }
+ if (isrc & IRQ_RI) {
+ /* receive interrupt */
+ while (status & SR_RBS) {
+ sja1000_rx(dev);
+ status = priv->read_reg(priv, REG_SR);
+ }
+ }
+ if (isrc & (IRQ_DOI | IRQ_EI | IRQ_BEI | IRQ_EPI | IRQ_ALI)) {
+ /* error interrupt */
+ if (sja1000_err(dev, isrc, status))
+ break;
+ }
+ }
+
+ if (priv->post_irq)
+ priv->post_irq(priv);
+
+ if (n >= SJA1000_MAX_IRQ)
+ dev_dbg(dev->dev.parent, "%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);
+ priv->open_time = jiffies;
+
+ 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);
+
+ priv->open_time = 0;
+
+ 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);
+ 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;
+
+ 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,
+};
+
+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;
+
+ 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);
diff --git a/drivers/net/can/sja1000/sja1000.h b/drivers/net/can/sja1000/sja1000.h
new file mode 100644
index 00000000000..302d2c763ad
--- /dev/null
+++ b/drivers/net/can/sja1000/sja1000.h
@@ -0,0 +1,181 @@
+/*
+ * sja1000.h - 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.
+ *
+ * Send feedback to <socketcan-users@lists.berlios.de>
+ *
+ */
+
+#ifndef SJA1000_DEV_H
+#define SJA1000_DEV_H
+
+#include <linux/can/dev.h>
+#include <linux/can/platform/sja1000.h>
+
+#define SJA1000_MAX_IRQ 20 /* max. number of interrupts handled in ISR */
+
+/* SJA1000 registers - manual section 6.4 (Pelican Mode) */
+#define REG_MOD 0x00
+#define REG_CMR 0x01
+#define REG_SR 0x02
+#define REG_IR 0x03
+#define REG_IER 0x04
+#define REG_ALC 0x0B
+#define REG_ECC 0x0C
+#define REG_EWL 0x0D
+#define REG_RXERR 0x0E
+#define REG_TXERR 0x0F
+#define REG_ACCC0 0x10
+#define REG_ACCC1 0x11
+#define REG_ACCC2 0x12
+#define REG_ACCC3 0x13
+#define REG_ACCM0 0x14
+#define REG_ACCM1 0x15
+#define REG_ACCM2 0x16
+#define REG_ACCM3 0x17
+#define REG_RMC 0x1D
+#define REG_RBSA 0x1E
+
+/* Common registers - manual section 6.5 */
+#define REG_BTR0 0x06
+#define REG_BTR1 0x07
+#define REG_OCR 0x08
+#define REG_CDR 0x1F
+
+#define REG_FI 0x10
+#define SFF_BUF 0x13
+#define EFF_BUF 0x15
+
+#define FI_FF 0x80
+#define FI_RTR 0x40
+
+#define REG_ID1 0x11
+#define REG_ID2 0x12
+#define REG_ID3 0x13
+#define REG_ID4 0x14
+
+#define CAN_RAM 0x20
+
+/* mode register */
+#define MOD_RM 0x01
+#define MOD_LOM 0x02
+#define MOD_STM 0x04
+#define MOD_AFM 0x08
+#define MOD_SM 0x10
+
+/* commands */
+#define CMD_SRR 0x10
+#define CMD_CDO 0x08
+#define CMD_RRB 0x04
+#define CMD_AT 0x02
+#define CMD_TR 0x01
+
+/* interrupt sources */
+#define IRQ_BEI 0x80
+#define IRQ_ALI 0x40
+#define IRQ_EPI 0x20
+#define IRQ_WUI 0x10
+#define IRQ_DOI 0x08
+#define IRQ_EI 0x04
+#define IRQ_TI 0x02
+#define IRQ_RI 0x01
+#define IRQ_ALL 0xFF
+#define IRQ_OFF 0x00
+
+/* status register content */
+#define SR_BS 0x80
+#define SR_ES 0x40
+#define SR_TS 0x20
+#define SR_RS 0x10
+#define SR_TCS 0x08
+#define SR_TBS 0x04
+#define SR_DOS 0x02
+#define SR_RBS 0x01
+
+#define SR_CRIT (SR_BS|SR_ES)
+
+/* ECC register */
+#define ECC_SEG 0x1F
+#define ECC_DIR 0x20
+#define ECC_ERR 6
+#define ECC_BIT 0x00
+#define ECC_FORM 0x40
+#define ECC_STUFF 0x80
+#define ECC_MASK 0xc0
+
+/*
+ * Flags for sja1000priv.flags
+ */
+#define SJA1000_CUSTOM_IRQ_HANDLER 0x1
+
+/*
+ * SJA1000 private data structure
+ */
+struct sja1000_priv {
+ struct can_priv can; /* must be the first member */
+ int open_time;
+ struct sk_buff *echo_skb;
+
+ /* the lower-layer is responsible for appropriate locking */
+ u8 (*read_reg) (const struct sja1000_priv *priv, int reg);
+ void (*write_reg) (const struct sja1000_priv *priv, int reg, u8 val);
+ void (*pre_irq) (const struct sja1000_priv *priv);
+ void (*post_irq) (const struct sja1000_priv *priv);
+
+ void *priv; /* for board-specific data */
+ struct net_device *dev;
+
+ void __iomem *reg_base; /* ioremap'ed address to registers */
+ unsigned long irq_flags; /* for request_irq() */
+
+ u16 flags; /* custom mode flags */
+ u8 ocr; /* output control register */
+ u8 cdr; /* clock divider register */
+};
+
+struct net_device *alloc_sja1000dev(int sizeof_priv);
+void free_sja1000dev(struct net_device *dev);
+int register_sja1000dev(struct net_device *dev);
+void unregister_sja1000dev(struct net_device *dev);
+
+irqreturn_t sja1000_interrupt(int irq, void *dev_id);
+
+#endif /* SJA1000_DEV_H */
diff --git a/drivers/net/can/sja1000/sja1000_of_platform.c b/drivers/net/can/sja1000/sja1000_of_platform.c
new file mode 100644
index 00000000000..3373560405b
--- /dev/null
+++ b/drivers/net/can/sja1000/sja1000_of_platform.c
@@ -0,0 +1,235 @@
+/*
+ * Driver for SJA1000 CAN controllers on the OpenFirmware platform bus
+ *
+ * Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ * 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.
+ */
+
+/* This is a generic driver for SJA1000 chips on the OpenFirmware platform
+ * bus found on embedded PowerPC systems. You need a SJA1000 CAN node
+ * definition in your flattened device tree source (DTS) file similar to:
+ *
+ * can@3,100 {
+ * compatible = "nxp,sja1000";
+ * reg = <3 0x100 0x80>;
+ * interrupts = <2 0>;
+ * interrupt-parent = <&mpic>;
+ * nxp,external-clock-frequency = <16000000>;
+ * };
+ *
+ * See "Documentation/powerpc/dts-bindings/can/sja1000.txt" for further
+ * information.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+
+#include <linux/of_platform.h>
+#include <asm/prom.h>
+
+#include "sja1000.h"
+
+#define DRV_NAME "sja1000_of_platform"
+
+MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
+MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the OF platform bus");
+MODULE_LICENSE("GPL v2");
+
+#define SJA1000_OFP_CAN_CLOCK (16000000 / 2)
+
+#define SJA1000_OFP_OCR OCR_TX0_PULLDOWN
+#define SJA1000_OFP_CDR (CDR_CBP | CDR_CLK_OFF)
+
+static u8 sja1000_ofp_read_reg(const struct sja1000_priv *priv, int reg)
+{
+ return in_8(priv->reg_base + reg);
+}
+
+static void sja1000_ofp_write_reg(const struct sja1000_priv *priv,
+ int reg, u8 val)
+{
+ out_8(priv->reg_base + reg, val);
+}
+
+static int __devexit sja1000_ofp_remove(struct of_device *ofdev)
+{
+ struct net_device *dev = dev_get_drvdata(&ofdev->dev);
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct device_node *np = ofdev->node;
+ struct resource res;
+
+ dev_set_drvdata(&ofdev->dev, NULL);
+
+ unregister_sja1000dev(dev);
+ free_sja1000dev(dev);
+ iounmap(priv->reg_base);
+ irq_dispose_mapping(dev->irq);
+
+ of_address_to_resource(np, 0, &res);
+ release_mem_region(res.start, resource_size(&res));
+
+ return 0;
+}
+
+static int __devinit sja1000_ofp_probe(struct of_device *ofdev,
+ const struct of_device_id *id)
+{
+ struct device_node *np = ofdev->node;
+ struct net_device *dev;
+ struct sja1000_priv *priv;
+ struct resource res;
+ const u32 *prop;
+ int err, irq, res_size, prop_size;
+ void __iomem *base;
+
+ err = of_address_to_resource(np, 0, &res);
+ if (err) {
+ dev_err(&ofdev->dev, "invalid address\n");
+ return err;
+ }
+
+ res_size = resource_size(&res);
+
+ if (!request_mem_region(res.start, res_size, DRV_NAME)) {
+ dev_err(&ofdev->dev, "couldn't request %#llx..%#llx\n",
+ (unsigned long long)res.start,
+ (unsigned long long)res.end);
+ return -EBUSY;
+ }
+
+ base = ioremap_nocache(res.start, res_size);
+ if (!base) {
+ dev_err(&ofdev->dev, "couldn't ioremap %#llx..%#llx\n",
+ (unsigned long long)res.start,
+ (unsigned long long)res.end);
+ err = -ENOMEM;
+ goto exit_release_mem;
+ }
+
+ irq = irq_of_parse_and_map(np, 0);
+ if (irq == NO_IRQ) {
+ dev_err(&ofdev->dev, "no irq found\n");
+ err = -ENODEV;
+ goto exit_unmap_mem;
+ }
+
+ dev = alloc_sja1000dev(0);
+ if (!dev) {
+ err = -ENOMEM;
+ goto exit_dispose_irq;
+ }
+
+ priv = netdev_priv(dev);
+
+ priv->read_reg = sja1000_ofp_read_reg;
+ priv->write_reg = sja1000_ofp_write_reg;
+
+ prop = of_get_property(np, "nxp,external-clock-frequency", &prop_size);
+ if (prop && (prop_size == sizeof(u32)))
+ priv->can.clock.freq = *prop / 2;
+ else
+ priv->can.clock.freq = SJA1000_OFP_CAN_CLOCK; /* default */
+
+ prop = of_get_property(np, "nxp,tx-output-mode", &prop_size);
+ if (prop && (prop_size == sizeof(u32)))
+ priv->ocr |= *prop & OCR_MODE_MASK;
+ else
+ priv->ocr |= OCR_MODE_NORMAL; /* default */
+
+ prop = of_get_property(np, "nxp,tx-output-config", &prop_size);
+ if (prop && (prop_size == sizeof(u32)))
+ priv->ocr |= (*prop << OCR_TX_SHIFT) & OCR_TX_MASK;
+ else
+ priv->ocr |= OCR_TX0_PULLDOWN; /* default */
+
+ prop = of_get_property(np, "nxp,clock-out-frequency", &prop_size);
+ if (prop && (prop_size == sizeof(u32)) && *prop) {
+ u32 divider = priv->can.clock.freq * 2 / *prop;
+
+ if (divider > 1)
+ priv->cdr |= divider / 2 - 1;
+ else
+ priv->cdr |= CDR_CLKOUT_MASK;
+ } else {
+ priv->cdr |= CDR_CLK_OFF; /* default */
+ }
+
+ prop = of_get_property(np, "nxp,no-comparator-bypass", NULL);
+ if (!prop)
+ priv->cdr |= CDR_CBP; /* default */
+
+ priv->irq_flags = IRQF_SHARED;
+ priv->reg_base = base;
+
+ dev->irq = irq;
+
+ dev_info(&ofdev->dev,
+ "reg_base=0x%p irq=%d clock=%d ocr=0x%02x cdr=0x%02x\n",
+ priv->reg_base, dev->irq, priv->can.clock.freq,
+ priv->ocr, priv->cdr);
+
+ dev_set_drvdata(&ofdev->dev, dev);
+ SET_NETDEV_DEV(dev, &ofdev->dev);
+
+ err = register_sja1000dev(dev);
+ if (err) {
+ dev_err(&ofdev->dev, "registering %s failed (err=%d)\n",
+ DRV_NAME, err);
+ goto exit_free_sja1000;
+ }
+
+ return 0;
+
+exit_free_sja1000:
+ free_sja1000dev(dev);
+exit_dispose_irq:
+ irq_dispose_mapping(irq);
+exit_unmap_mem:
+ iounmap(base);
+exit_release_mem:
+ release_mem_region(res.start, res_size);
+
+ return err;
+}
+
+static struct of_device_id __devinitdata sja1000_ofp_table[] = {
+ {.compatible = "nxp,sja1000"},
+ {},
+};
+
+static struct of_platform_driver sja1000_ofp_driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ .probe = sja1000_ofp_probe,
+ .remove = __devexit_p(sja1000_ofp_remove),
+ .match_table = sja1000_ofp_table,
+};
+
+static int __init sja1000_ofp_init(void)
+{
+ return of_register_platform_driver(&sja1000_ofp_driver);
+}
+module_init(sja1000_ofp_init);
+
+static void __exit sja1000_ofp_exit(void)
+{
+ return of_unregister_platform_driver(&sja1000_ofp_driver);
+};
+module_exit(sja1000_ofp_exit);
diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c
new file mode 100644
index 00000000000..628374c2a05
--- /dev/null
+++ b/drivers/net/can/sja1000/sja1000_platform.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2005 Sascha Hauer, Pengutronix
+ * Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ * 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/netdevice.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/can/platform/sja1000.h>
+#include <linux/io.h>
+
+#include "sja1000.h"
+
+#define DRV_NAME "sja1000_platform"
+
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
+MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the platform bus");
+MODULE_LICENSE("GPL v2");
+
+static u8 sp_read_reg(const struct sja1000_priv *priv, int reg)
+{
+ return ioread8(priv->reg_base + reg);
+}
+
+static void sp_write_reg(const struct sja1000_priv *priv, int reg, u8 val)
+{
+ iowrite8(val, priv->reg_base + reg);
+}
+
+static int sp_probe(struct platform_device *pdev)
+{
+ int err;
+ void __iomem *addr;
+ struct net_device *dev;
+ struct sja1000_priv *priv;
+ struct resource *res_mem, *res_irq;
+ struct sja1000_platform_data *pdata;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev, "No platform data provided!\n");
+ err = -ENODEV;
+ goto exit;
+ }
+
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_mem || !res_irq) {
+ err = -ENODEV;
+ goto exit;
+ }
+
+ if (!request_mem_region(res_mem->start, resource_size(res_mem),
+ DRV_NAME)) {
+ err = -EBUSY;
+ goto exit;
+ }
+
+ addr = ioremap_nocache(res_mem->start, resource_size(res_mem));
+ if (!addr) {
+ err = -ENOMEM;
+ goto exit_release;
+ }
+
+ dev = alloc_sja1000dev(0);
+ if (!dev) {
+ err = -ENOMEM;
+ goto exit_iounmap;
+ }
+ priv = netdev_priv(dev);
+
+ dev->irq = res_irq->start;
+ priv->irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
+ priv->reg_base = addr;
+ priv->read_reg = sp_read_reg;
+ priv->write_reg = sp_write_reg;
+ priv->can.clock.freq = pdata->clock;
+ priv->ocr = pdata->ocr;
+ priv->cdr = pdata->cdr;
+
+ dev_set_drvdata(&pdev->dev, dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ err = register_sja1000dev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "registering %s failed (err=%d)\n",
+ DRV_NAME, err);
+ goto exit_free;
+ }
+
+ dev_info(&pdev->dev, "%s device registered (reg_base=%p, irq=%d)\n",
+ DRV_NAME, priv->reg_base, dev->irq);
+ return 0;
+
+ exit_free:
+ free_sja1000dev(dev);
+ exit_iounmap:
+ iounmap(addr);
+ exit_release:
+ release_mem_region(res_mem->start, resource_size(res_mem));
+ exit:
+ return err;
+}
+
+static int sp_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = dev_get_drvdata(&pdev->dev);
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct resource *res;
+
+ unregister_sja1000dev(dev);
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ if (priv->reg_base)
+ iounmap(priv->reg_base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, resource_size(res));
+
+ free_sja1000dev(dev);
+
+ return 0;
+}
+
+static struct platform_driver sp_driver = {
+ .probe = sp_probe,
+ .remove = sp_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init sp_init(void)
+{
+ return platform_driver_register(&sp_driver);
+}
+
+static void __exit sp_exit(void)
+{
+ platform_driver_unregister(&sp_driver);
+}
+
+module_init(sp_init);
+module_exit(sp_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-05 01:43:36 +0000