1 files changed, 170 insertions, 99 deletions

diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
index 542a4f7255b..f31499a32d7 100644
--- a/drivers/net/can/sja1000/sja1000.c
+++ b/drivers/net/can/sja1000/sja1000.c
@@ -40,8 +40,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  * DAMAGE.
  *
- * Send feedback to <socketcan-users@lists.berlios.de>
- *
  */
 
 #include <linux/module.h>
@@ -60,9 +58,9 @@
 #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/led.h>
 
 #include "sja1000.h"
 
@@ -72,7 +70,7 @@ 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 = {
+static const struct can_bittiming_const sja1000_bittiming_const = {
 	.name = DRV_NAME,
 	.tseg1_min = 1,
 	.tseg1_max = 16,
@@ -84,13 +82,31 @@ static struct can_bittiming_const sja1000_bittiming_const = {
 	.brp_inc = 1,
 };
 
+static void sja1000_write_cmdreg(struct sja1000_priv *priv, u8 val)
+{
+	unsigned long flags;
+
+	/*
+	 * The command register needs some locking and time to settle
+	 * the write_reg() operation - especially on SMP systems.
+	 */
+	spin_lock_irqsave(&priv->cmdreg_lock, flags);
+	priv->write_reg(priv, SJA1000_CMR, val);
+	priv->read_reg(priv, SJA1000_SR);
+	spin_unlock_irqrestore(&priv->cmdreg_lock, flags);
+}
+
+static int sja1000_is_absent(struct sja1000_priv *priv)
+{
+	return (priv->read_reg(priv, SJA1000_MOD) == 0xFF);
+}
+
 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);
+	if (priv->reg_base && sja1000_is_absent(priv)) {
+		netdev_err(dev, "probing failed\n");
 		return 0;
 	}
 	return -1;
@@ -99,11 +115,11 @@ static int sja1000_probe_chip(struct net_device *dev)
 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);
+	unsigned char status = priv->read_reg(priv, SJA1000_MOD);
 	int i;
 
 	/* disable interrupts */
-	priv->write_reg(priv, REG_IER, IRQ_OFF);
+	priv->write_reg(priv, SJA1000_IER, IRQ_OFF);
 
 	for (i = 0; i < 100; i++) {
 		/* check reset bit */
@@ -112,36 +128,46 @@ static void set_reset_mode(struct net_device *dev)
 			return;
 		}
 
-		priv->write_reg(priv, REG_MOD, MOD_RM);	/* reset chip */
+		/* reset chip */
+		priv->write_reg(priv, SJA1000_MOD, MOD_RM);
 		udelay(10);
-		status = priv->read_reg(priv, REG_MOD);
+		status = priv->read_reg(priv, SJA1000_MOD);
 	}
 
-	dev_err(dev->dev.parent, "setting SJA1000 into reset mode failed!\n");
+	netdev_err(dev, "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);
+	unsigned char status = priv->read_reg(priv, SJA1000_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);
+			/* enable interrupts */
+			if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
+				priv->write_reg(priv, SJA1000_IER, IRQ_ALL);
+			else
+				priv->write_reg(priv, SJA1000_IER,
+						IRQ_ALL & ~IRQ_BEI);
 			return;
 		}
 
 		/* set chip to normal mode */
-		priv->write_reg(priv, REG_MOD, 0x00);
+		if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
+			priv->write_reg(priv, SJA1000_MOD, MOD_LOM);
+		else
+			priv->write_reg(priv, SJA1000_MOD, 0x00);
+
 		udelay(10);
-		status = priv->read_reg(priv, REG_MOD);
+
+		status = priv->read_reg(priv, SJA1000_MOD);
 	}
 
-	dev_err(dev->dev.parent, "setting SJA1000 into normal mode failed!\n");
+	netdev_err(dev, "setting SJA1000 into normal mode failed!\n");
 }
 
 static void sja1000_start(struct net_device *dev)
@@ -153,9 +179,9 @@ static void sja1000_start(struct net_device *dev)
 		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);
+	priv->write_reg(priv, SJA1000_TXERR, 0x0);
+	priv->write_reg(priv, SJA1000_RXERR, 0x0);
+	priv->read_reg(priv, SJA1000_ECC);
 
 	/* leave reset mode */
 	set_normal_mode(dev);
@@ -163,11 +189,6 @@ static void sja1000_start(struct net_device *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);
@@ -194,11 +215,21 @@ static int sja1000_set_bittiming(struct net_device *dev)
 	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);
+	netdev_info(dev, "setting BTR0=0x%02x BTR1=0x%02x\n", btr0, btr1);
 
-	priv->write_reg(priv, REG_BTR0, btr0);
-	priv->write_reg(priv, REG_BTR1, btr1);
+	priv->write_reg(priv, SJA1000_BTR0, btr0);
+	priv->write_reg(priv, SJA1000_BTR1, btr1);
+
+	return 0;
+}
+
+static int sja1000_get_berr_counter(const struct net_device *dev,
+				    struct can_berr_counter *bec)
+{
+	struct sja1000_priv *priv = netdev_priv(dev);
+
+	bec->txerr = priv->read_reg(priv, SJA1000_TXERR);
+	bec->rxerr = priv->read_reg(priv, SJA1000_RXERR);
 
 	return 0;
 }
@@ -216,20 +247,20 @@ 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);
+	priv->write_reg(priv, SJA1000_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, SJA1000_ACCC0, 0x00);
+	priv->write_reg(priv, SJA1000_ACCC1, 0x00);
+	priv->write_reg(priv, SJA1000_ACCC2, 0x00);
+	priv->write_reg(priv, SJA1000_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, SJA1000_ACCM0, 0xFF);
+	priv->write_reg(priv, SJA1000_ACCM1, 0xFF);
+	priv->write_reg(priv, SJA1000_ACCM2, 0xFF);
+	priv->write_reg(priv, SJA1000_ACCM3, 0xFF);
 
-	priv->write_reg(priv, REG_OCR, priv->ocr | OCR_MODE_NORMAL);
+	priv->write_reg(priv, SJA1000_OCR, priv->ocr | OCR_MODE_NORMAL);
 }
 
 /*
@@ -249,37 +280,41 @@ static netdev_tx_t sja1000_start_xmit(struct sk_buff *skb,
 	uint8_t dreg;
 	int i;
 
+	if (can_dropped_invalid_skb(dev, skb))
+		return NETDEV_TX_OK;
+
 	netif_stop_queue(dev);
 
 	fi = dlc = cf->can_dlc;
 	id = cf->can_id;
 
 	if (id & CAN_RTR_FLAG)
-		fi |= FI_RTR;
+		fi |= SJA1000_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);
+		fi |= SJA1000_FI_FF;
+		dreg = SJA1000_EFF_BUF;
+		priv->write_reg(priv, SJA1000_FI, fi);
+		priv->write_reg(priv, SJA1000_ID1, (id & 0x1fe00000) >> 21);
+		priv->write_reg(priv, SJA1000_ID2, (id & 0x001fe000) >> 13);
+		priv->write_reg(priv, SJA1000_ID3, (id & 0x00001fe0) >> 5);
+		priv->write_reg(priv, SJA1000_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);
+		dreg = SJA1000_SFF_BUF;
+		priv->write_reg(priv, SJA1000_FI, fi);
+		priv->write_reg(priv, SJA1000_ID1, (id & 0x000007f8) >> 3);
+		priv->write_reg(priv, SJA1000_ID2, (id & 0x00000007) << 5);
 	}
 
 	for (i = 0; i < dlc; i++)
 		priv->write_reg(priv, dreg++, cf->data[i]);
 
-	dev->trans_start = jiffies;
-
 	can_put_echo_skb(skb, dev, 0);
 
-	priv->write_reg(priv, REG_CMR, CMD_TR);
+	if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
+		sja1000_write_cmdreg(priv, CMD_TR | CMD_AT);
+	else
+		sja1000_write_cmdreg(priv, CMD_TR);
 
 	return NETDEV_TX_OK;
 }
@@ -300,27 +335,27 @@ static void sja1000_rx(struct net_device *dev)
 	if (skb == NULL)
 		return;
 
-	fi = priv->read_reg(priv, REG_FI);
+	fi = priv->read_reg(priv, SJA1000_FI);
 
-	if (fi & FI_FF) {
+	if (fi & SJA1000_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);
+		dreg = SJA1000_EFF_BUF;
+		id = (priv->read_reg(priv, SJA1000_ID1) << 21)
+		    | (priv->read_reg(priv, SJA1000_ID2) << 13)
+		    | (priv->read_reg(priv, SJA1000_ID3) << 5)
+		    | (priv->read_reg(priv, SJA1000_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);
+		dreg = SJA1000_SFF_BUF;
+		id = (priv->read_reg(priv, SJA1000_ID1) << 3)
+		    | (priv->read_reg(priv, SJA1000_ID2) >> 5);
 	}
 
-	if (fi & FI_RTR) {
+	cf->can_dlc = get_can_dlc(fi & 0x0F);
+	if (fi & SJA1000_FI_RTR) {
 		id |= CAN_RTR_FLAG;
 	} else {
-		cf->can_dlc = get_can_dlc(fi & 0x0F);
 		for (i = 0; i < cf->can_dlc; i++)
 			cf->data[i] = priv->read_reg(priv, dreg++);
 	}
@@ -328,12 +363,14 @@ static void sja1000_rx(struct net_device *dev)
 	cf->can_id = id;
 
 	/* release receive buffer */
-	priv->write_reg(priv, REG_CMR, CMD_RRB);
+	sja1000_write_cmdreg(priv, CMD_RRB);
 
 	netif_rx(skb);
 
 	stats->rx_packets++;
 	stats->rx_bytes += cf->can_dlc;
+
+	can_led_event(dev, CAN_LED_EVENT_RX);
 }
 
 static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
@@ -351,17 +388,17 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
 
 	if (isrc & IRQ_DOI) {
 		/* data overrun interrupt */
-		dev_dbg(dev->dev.parent, "data overrun interrupt\n");
+		netdev_dbg(dev, "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 */
+		sja1000_write_cmdreg(priv, CMD_CDO);	/* clear bit */
 	}
 
 	if (isrc & IRQ_EI) {
 		/* error warning interrupt */
-		dev_dbg(dev->dev.parent, "error warning interrupt\n");
+		netdev_dbg(dev, "error warning interrupt\n");
 
 		if (status & SR_BS) {
 			state = CAN_STATE_BUS_OFF;
@@ -377,7 +414,7 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
 		priv->can.can_stats.bus_error++;
 		stats->rx_errors++;
 
-		ecc = priv->read_reg(priv, REG_ECC);
+		ecc = priv->read_reg(priv, SJA1000_ECC);
 
 		cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
 
@@ -396,13 +433,13 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
 			cf->data[3] = ecc & ECC_SEG;
 			break;
 		}
-		/* Error occured during transmission? */
+		/* Error occurred 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");
+		netdev_dbg(dev, "error passive interrupt\n");
 		if (status & SR_ES)
 			state = CAN_STATE_ERROR_PASSIVE;
 		else
@@ -410,8 +447,8 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
 	}
 	if (isrc & IRQ_ALI) {
 		/* arbitration lost interrupt */
-		dev_dbg(dev->dev.parent, "arbitration lost interrupt\n");
-		alc = priv->read_reg(priv, REG_ALC);
+		netdev_dbg(dev, "arbitration lost interrupt\n");
+		alc = priv->read_reg(priv, SJA1000_ALC);
 		priv->can.can_stats.arbitration_lost++;
 		stats->tx_errors++;
 		cf->can_id |= CAN_ERR_LOSTARB;
@@ -420,8 +457,8 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
 
 	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);
+		uint8_t rxerr = priv->read_reg(priv, SJA1000_RXERR);
+		uint8_t txerr = priv->read_reg(priv, SJA1000_TXERR);
 		cf->can_id |= CAN_ERR_CRTL;
 		if (state == CAN_STATE_ERROR_WARNING) {
 			priv->can.can_stats.error_warning++;
@@ -434,6 +471,8 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
 				CAN_ERR_CRTL_TX_PASSIVE :
 				CAN_ERR_CRTL_RX_PASSIVE;
 		}
+		cf->data[6] = txerr;
+		cf->data[7] = rxerr;
 	}
 
 	priv->can.state = state;
@@ -454,32 +493,48 @@ irqreturn_t sja1000_interrupt(int irq, void *dev_id)
 	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);
+	/* Shared interrupts and IRQ off? */
+	if (priv->read_reg(priv, SJA1000_IER) == IRQ_OFF)
+		goto out;
+
+	while ((isrc = priv->read_reg(priv, SJA1000_IR)) &&
+	       (n < SJA1000_MAX_IRQ)) {
+
+		status = priv->read_reg(priv, SJA1000_SR);
+		/* check for absent controller due to hw unplug */
+		if (status == 0xFF && sja1000_is_absent(priv))
+			goto out;
 
 		if (isrc & IRQ_WUI)
-			dev_warn(dev->dev.parent, "wakeup interrupt\n");
+			netdev_warn(dev, "wakeup interrupt\n");
 
 		if (isrc & IRQ_TI) {
-			/* transmission complete interrupt */
-			stats->tx_bytes += priv->read_reg(priv, REG_FI) & 0xf;
-			stats->tx_packets++;
-			can_get_echo_skb(dev, 0);
+			/* transmission buffer released */
+			if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT &&
+			    !(status & SR_TCS)) {
+				stats->tx_errors++;
+				can_free_echo_skb(dev, 0);
+			} else {
+				/* transmission complete */
+				stats->tx_bytes +=
+					priv->read_reg(priv, SJA1000_FI) & 0xf;
+				stats->tx_packets++;
+				can_get_echo_skb(dev, 0);
+			}
 			netif_wake_queue(dev);
+			can_led_event(dev, CAN_LED_EVENT_TX);
 		}
 		if (isrc & IRQ_RI) {
 			/* receive interrupt */
 			while (status & SR_RBS) {
 				sja1000_rx(dev);
-				status = priv->read_reg(priv, REG_SR);
+				status = priv->read_reg(priv, SJA1000_SR);
+				/* check for absent controller */
+				if (status == 0xFF && sja1000_is_absent(priv))
+					goto out;
 			}
 		}
 		if (isrc & (IRQ_DOI | IRQ_EI | IRQ_BEI | IRQ_EPI | IRQ_ALI)) {
@@ -487,13 +542,14 @@ irqreturn_t sja1000_interrupt(int irq, void *dev_id)
 			if (sja1000_err(dev, isrc, status))
 				break;
 		}
+		n++;
 	}
-
+out:
 	if (priv->post_irq)
 		priv->post_irq(priv);
 
 	if (n >= SJA1000_MAX_IRQ)
-		dev_dbg(dev->dev.parent, "%d messages handled in ISR", n);
+		netdev_dbg(dev, "%d messages handled in ISR", n);
 
 	return (n) ? IRQ_HANDLED : IRQ_NONE;
 }
@@ -524,7 +580,8 @@ static int sja1000_open(struct net_device *dev)
 
 	/* init and start chi */
 	sja1000_start(dev);
-	priv->open_time = jiffies;
+
+	can_led_event(dev, CAN_LED_EVENT_OPEN);
 
 	netif_start_queue(dev);
 
@@ -543,7 +600,7 @@ static int sja1000_close(struct net_device *dev)
 
 	close_candev(dev);
 
-	priv->open_time = 0;
+	can_led_event(dev, CAN_LED_EVENT_STOP);
 
 	return 0;
 }
@@ -564,6 +621,12 @@ struct net_device *alloc_sja1000dev(int sizeof_priv)
 	priv->can.bittiming_const = &sja1000_bittiming_const;
 	priv->can.do_set_bittiming = sja1000_set_bittiming;
 	priv->can.do_set_mode = sja1000_set_mode;
+	priv->can.do_get_berr_counter = sja1000_get_berr_counter;
+	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
+		CAN_CTRLMODE_BERR_REPORTING | CAN_CTRLMODE_LISTENONLY |
+		CAN_CTRLMODE_ONE_SHOT;
+
+	spin_lock_init(&priv->cmdreg_lock);
 
 	if (sizeof_priv)
 		priv->priv = (void *)priv + sizeof(struct sja1000_priv);
@@ -579,13 +642,16 @@ void free_sja1000dev(struct net_device *dev)
 EXPORT_SYMBOL_GPL(free_sja1000dev);
 
 static const struct net_device_ops sja1000_netdev_ops = {
-       .ndo_open               = sja1000_open,
-       .ndo_stop               = sja1000_close,
-       .ndo_start_xmit         = sja1000_start_xmit,
+	.ndo_open	= sja1000_open,
+	.ndo_stop	= sja1000_close,
+	.ndo_start_xmit	= sja1000_start_xmit,
+	.ndo_change_mtu	= can_change_mtu,
 };
 
 int register_sja1000dev(struct net_device *dev)
 {
+	int ret;
+
 	if (!sja1000_probe_chip(dev))
 		return -ENODEV;
 
@@ -595,7 +661,12 @@ int register_sja1000dev(struct net_device *dev)
 	set_reset_mode(dev);
 	chipset_init(dev);
 
-	return register_candev(dev);
+	ret =  register_candev(dev);
+
+	if (!ret)
+		devm_can_led_init(dev);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(register_sja1000dev);