Merge branch 'can/at91-sam9x5' of git://git.pengutronix.de/git/mkl/linux-2.6

2 files changed, 259 insertions, 112 deletions

diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index 1d699e3df547..bbf06f77ee8c 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -58,9 +58,10 @@ config CAN_CALC_BITTIMING
 
 config CAN_AT91
 	tristate "Atmel AT91 onchip CAN controller"
-	depends on CAN_DEV && ARCH_AT91SAM9263
+	depends on CAN_DEV && (ARCH_AT91SAM9263 || ARCH_AT91SAM9X5)
 	---help---
-	  This is a driver for the SoC CAN controller in Atmel's AT91SAM9263.
+	  This is a driver for the SoC CAN controller in Atmel's AT91SAM9263
+	  and AT91SAM9X5 processors.
 
 config CAN_TI_HECC
 	depends on CAN_DEV && ARCH_OMAP3
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 74efb5a2ad41..121ede663e20 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -41,32 +41,7 @@
 
 #include <mach/board.h>
 
-#define AT91_NAPI_WEIGHT	11
-
-/*
- * RX/TX Mailbox split
- * don't dare to touch
- */
-#define AT91_MB_RX_NUM		11
-#define AT91_MB_TX_SHIFT	2
-
-#define AT91_MB_RX_FIRST	1
-#define AT91_MB_RX_LAST		(AT91_MB_RX_FIRST + AT91_MB_RX_NUM - 1)
-
-#define AT91_MB_RX_MASK(i)	((1 << (i)) - 1)
-#define AT91_MB_RX_SPLIT	8
-#define AT91_MB_RX_LOW_LAST	(AT91_MB_RX_SPLIT - 1)
-#define AT91_MB_RX_LOW_MASK	(AT91_MB_RX_MASK(AT91_MB_RX_SPLIT) & \
-				 ~AT91_MB_RX_MASK(AT91_MB_RX_FIRST))
-
-#define AT91_MB_TX_NUM		(1 << AT91_MB_TX_SHIFT)
-#define AT91_MB_TX_FIRST	(AT91_MB_RX_LAST + 1)
-#define AT91_MB_TX_LAST		(AT91_MB_TX_FIRST + AT91_MB_TX_NUM - 1)
-
-#define AT91_NEXT_PRIO_SHIFT	(AT91_MB_TX_SHIFT)
-#define AT91_NEXT_PRIO_MASK	(0xf << AT91_MB_TX_SHIFT)
-#define AT91_NEXT_MB_MASK	(AT91_MB_TX_NUM - 1)
-#define AT91_NEXT_MASK		((AT91_MB_TX_NUM - 1) | AT91_NEXT_PRIO_MASK)
+#define AT91_MB_MASK(i)		((1 << (i)) - 1)
 
 /* Common registers */
 enum at91_reg {
@@ -128,12 +103,6 @@ enum at91_mb_mode {
 };
 
 /* Interrupt mask bits */
-#define AT91_IRQ_MB_RX		((1 << (AT91_MB_RX_LAST + 1)) \
-				 - (1 << AT91_MB_RX_FIRST))
-#define AT91_IRQ_MB_TX		((1 << (AT91_MB_TX_LAST + 1)) \
-				 - (1 << AT91_MB_TX_FIRST))
-#define AT91_IRQ_MB_ALL		(AT91_IRQ_MB_RX | AT91_IRQ_MB_TX)
-
 #define AT91_IRQ_ERRA		(1 << 16)
 #define AT91_IRQ_WARN		(1 << 17)
 #define AT91_IRQ_ERRP		(1 << 18)
@@ -156,22 +125,51 @@ enum at91_mb_mode {
 
 #define AT91_IRQ_ALL		(0x1fffffff)
 
+enum at91_devtype {
+	AT91_DEVTYPE_SAM9263,
+	AT91_DEVTYPE_SAM9X5,
+};
+
+struct at91_devtype_data {
+	unsigned int rx_first;
+	unsigned int rx_split;
+	unsigned int rx_last;
+	unsigned int tx_shift;
+	enum at91_devtype type;
+};
+
 struct at91_priv {
-	struct can_priv		can;	   /* must be the first member! */
-	struct net_device	*dev;
-	struct napi_struct	napi;
+	struct can_priv can;		/* must be the first member! */
+	struct net_device *dev;
+	struct napi_struct napi;
 
-	void __iomem		*reg_base;
+	void __iomem *reg_base;
 
-	u32			reg_sr;
-	unsigned int		tx_next;
-	unsigned int		tx_echo;
-	unsigned int		rx_next;
+	u32 reg_sr;
+	unsigned int tx_next;
+	unsigned int tx_echo;
+	unsigned int rx_next;
+	struct at91_devtype_data devtype_data;
 
-	struct clk		*clk;
-	struct at91_can_data	*pdata;
+	struct clk *clk;
+	struct at91_can_data *pdata;
 
-	canid_t			mb0_id;
+	canid_t mb0_id;
+};
+
+static const struct at91_devtype_data at91_devtype_data[] __devinitconst = {
+	[AT91_DEVTYPE_SAM9263] = {
+		.rx_first = 1,
+		.rx_split = 8,
+		.rx_last = 11,
+		.tx_shift = 2,
+	},
+	[AT91_DEVTYPE_SAM9X5] = {
+		.rx_first = 0,
+		.rx_split = 4,
+		.rx_last = 5,
+		.tx_shift = 1,
+	},
 };
 
 static struct can_bittiming_const at91_bittiming_const = {
@@ -186,19 +184,111 @@ static struct can_bittiming_const at91_bittiming_const = {
 	.brp_inc	= 1,
 };
 
-static inline int get_tx_next_mb(const struct at91_priv *priv)
+#define AT91_IS(_model) \
+static inline int at91_is_sam##_model(const struct at91_priv *priv) \
+{ \
+	return priv->devtype_data.type == AT91_DEVTYPE_SAM##_model; \
+}
+
+AT91_IS(9263);
+AT91_IS(9X5);
+
+static inline unsigned int get_mb_rx_first(const struct at91_priv *priv)
+{
+	return priv->devtype_data.rx_first;
+}
+
+static inline unsigned int get_mb_rx_last(const struct at91_priv *priv)
+{
+	return priv->devtype_data.rx_last;
+}
+
+static inline unsigned int get_mb_rx_split(const struct at91_priv *priv)
+{
+	return priv->devtype_data.rx_split;
+}
+
+static inline unsigned int get_mb_rx_num(const struct at91_priv *priv)
+{
+	return get_mb_rx_last(priv) - get_mb_rx_first(priv) + 1;
+}
+
+static inline unsigned int get_mb_rx_low_last(const struct at91_priv *priv)
+{
+	return get_mb_rx_split(priv) - 1;
+}
+
+static inline unsigned int get_mb_rx_low_mask(const struct at91_priv *priv)
+{
+	return AT91_MB_MASK(get_mb_rx_split(priv)) &
+		~AT91_MB_MASK(get_mb_rx_first(priv));
+}
+
+static inline unsigned int get_mb_tx_shift(const struct at91_priv *priv)
+{
+	return priv->devtype_data.tx_shift;
+}
+
+static inline unsigned int get_mb_tx_num(const struct at91_priv *priv)
+{
+	return 1 << get_mb_tx_shift(priv);
+}
+
+static inline unsigned int get_mb_tx_first(const struct at91_priv *priv)
+{
+	return get_mb_rx_last(priv) + 1;
+}
+
+static inline unsigned int get_mb_tx_last(const struct at91_priv *priv)
+{
+	return get_mb_tx_first(priv) + get_mb_tx_num(priv) - 1;
+}
+
+static inline unsigned int get_next_prio_shift(const struct at91_priv *priv)
+{
+	return get_mb_tx_shift(priv);
+}
+
+static inline unsigned int get_next_prio_mask(const struct at91_priv *priv)
+{
+	return 0xf << get_mb_tx_shift(priv);
+}
+
+static inline unsigned int get_next_mb_mask(const struct at91_priv *priv)
+{
+	return AT91_MB_MASK(get_mb_tx_shift(priv));
+}
+
+static inline unsigned int get_next_mask(const struct at91_priv *priv)
+{
+	return get_next_mb_mask(priv) | get_next_prio_mask(priv);
+}
+
+static inline unsigned int get_irq_mb_rx(const struct at91_priv *priv)
 {
-	return (priv->tx_next & AT91_NEXT_MB_MASK) + AT91_MB_TX_FIRST;
+	return AT91_MB_MASK(get_mb_rx_last(priv) + 1) &
+		~AT91_MB_MASK(get_mb_rx_first(priv));
 }
 
-static inline int get_tx_next_prio(const struct at91_priv *priv)
+static inline unsigned int get_irq_mb_tx(const struct at91_priv *priv)
 {
-	return (priv->tx_next >> AT91_NEXT_PRIO_SHIFT) & 0xf;
+	return AT91_MB_MASK(get_mb_tx_last(priv) + 1) &
+		~AT91_MB_MASK(get_mb_tx_first(priv));
 }
 
-static inline int get_tx_echo_mb(const struct at91_priv *priv)
+static inline unsigned int get_tx_next_mb(const struct at91_priv *priv)
 {
-	return (priv->tx_echo & AT91_NEXT_MB_MASK) + AT91_MB_TX_FIRST;
+	return (priv->tx_next & get_next_mb_mask(priv)) + get_mb_tx_first(priv);
+}
+
+static inline unsigned int get_tx_next_prio(const struct at91_priv *priv)
+{
+	return (priv->tx_next >> get_next_prio_shift(priv)) & 0xf;
+}
+
+static inline unsigned int get_tx_echo_mb(const struct at91_priv *priv)
+{
+	return (priv->tx_echo & get_next_mb_mask(priv)) + get_mb_tx_first(priv);
 }
 
 static inline u32 at91_read(const struct at91_priv *priv, enum at91_reg reg)
@@ -259,29 +349,29 @@ static void at91_setup_mailboxes(struct net_device *dev)
 	 * overflow.
 	 */
 	reg_mid = at91_can_id_to_reg_mid(priv->mb0_id);
-	for (i = 0; i < AT91_MB_RX_FIRST; i++) {
+	for (i = 0; i < get_mb_rx_first(priv); i++) {
 		set_mb_mode(priv, i, AT91_MB_MODE_DISABLED);
 		at91_write(priv, AT91_MID(i), reg_mid);
 		at91_write(priv, AT91_MCR(i), 0x0);	/* clear dlc */
 	}
 
-	for (i = AT91_MB_RX_FIRST; i < AT91_MB_RX_LAST; i++)
+	for (i = get_mb_rx_first(priv); i < get_mb_rx_last(priv); i++)
 		set_mb_mode(priv, i, AT91_MB_MODE_RX);
-	set_mb_mode(priv, AT91_MB_RX_LAST, AT91_MB_MODE_RX_OVRWR);
+	set_mb_mode(priv, get_mb_rx_last(priv), AT91_MB_MODE_RX_OVRWR);
 
 	/* reset acceptance mask and id register */
-	for (i = AT91_MB_RX_FIRST; i <= AT91_MB_RX_LAST; i++) {
-		at91_write(priv, AT91_MAM(i), 0x0 );
+	for (i = get_mb_rx_first(priv); i <= get_mb_rx_last(priv); i++) {
+		at91_write(priv, AT91_MAM(i), 0x0);
 		at91_write(priv, AT91_MID(i), AT91_MID_MIDE);
 	}
 
 	/* The last 4 mailboxes are used for transmitting. */
-	for (i = AT91_MB_TX_FIRST; i <= AT91_MB_TX_LAST; i++)
+	for (i = get_mb_tx_first(priv); i <= get_mb_tx_last(priv); i++)
 		set_mb_mode_prio(priv, i, AT91_MB_MODE_TX, 0);
 
 	/* Reset tx and rx helper pointers */
 	priv->tx_next = priv->tx_echo = 0;
-	priv->rx_next = AT91_MB_RX_FIRST;
+	priv->rx_next = get_mb_rx_first(priv);
 }
 
 static int at91_set_bittiming(struct net_device *dev)
@@ -336,7 +426,7 @@ static void at91_chip_start(struct net_device *dev)
 	priv->can.state = CAN_STATE_ERROR_ACTIVE;
 
 	/* Enable interrupts */
-	reg_ier = AT91_IRQ_MB_RX | AT91_IRQ_ERRP | AT91_IRQ_ERR_FRAME;
+	reg_ier = get_irq_mb_rx(priv) | AT91_IRQ_ERRP | AT91_IRQ_ERR_FRAME;
 	at91_write(priv, AT91_IDR, AT91_IRQ_ALL);
 	at91_write(priv, AT91_IER, reg_ier);
 }
@@ -375,8 +465,8 @@ static void at91_chip_stop(struct net_device *dev, enum can_state state)
  * mailbox, but without the offset AT91_MB_TX_FIRST. The lower bits
  * encode the mailbox number, the upper 4 bits the mailbox priority:
  *
- * priv->tx_next = (prio << AT91_NEXT_PRIO_SHIFT) ||
- *                 (mb - AT91_MB_TX_FIRST);
+ * priv->tx_next = (prio << get_next_prio_shift(priv)) |
+ *                 (mb - get_mb_tx_first(priv));
  *
  */
 static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
@@ -417,7 +507,7 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	stats->tx_bytes += cf->can_dlc;
 
 	/* _NOTE_: subtract AT91_MB_TX_FIRST offset from mb! */
-	can_put_echo_skb(skb, dev, mb - AT91_MB_TX_FIRST);
+	can_put_echo_skb(skb, dev, mb - get_mb_tx_first(priv));
 
 	/*
 	 * we have to stop the queue and deliver all messages in case
@@ -430,7 +520,7 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	priv->tx_next++;
 	if (!(at91_read(priv, AT91_MSR(get_tx_next_mb(priv))) &
 	      AT91_MSR_MRDY) ||
-	    (priv->tx_next & AT91_NEXT_MASK) == 0)
+	    (priv->tx_next & get_next_mask(priv)) == 0)
 		netif_stop_queue(dev);
 
 	/* Enable interrupt for this mailbox */
@@ -447,7 +537,7 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
  */
 static inline void at91_activate_rx_low(const struct at91_priv *priv)
 {
-	u32 mask = AT91_MB_RX_LOW_MASK;
+	u32 mask = get_mb_rx_low_mask(priv);
 	at91_write(priv, AT91_TCR, mask);
 }
 
@@ -513,17 +603,19 @@ static void at91_read_mb(struct net_device *dev, unsigned int mb,
 		cf->can_id = (reg_mid >> 18) & CAN_SFF_MASK;
 
 	reg_msr = at91_read(priv, AT91_MSR(mb));
-	if (reg_msr & AT91_MSR_MRTR)
-		cf->can_id |= CAN_RTR_FLAG;
 	cf->can_dlc = get_can_dlc((reg_msr >> 16) & 0xf);
 
-	*(u32 *)(cf->data + 0) = at91_read(priv, AT91_MDL(mb));
-	*(u32 *)(cf->data + 4) = at91_read(priv, AT91_MDH(mb));
+	if (reg_msr & AT91_MSR_MRTR)
+		cf->can_id |= CAN_RTR_FLAG;
+	else {
+		*(u32 *)(cf->data + 0) = at91_read(priv, AT91_MDL(mb));
+		*(u32 *)(cf->data + 4) = at91_read(priv, AT91_MDH(mb));
+	}
 
 	/* allow RX of extended frames */
 	at91_write(priv, AT91_MID(mb), AT91_MID_MIDE);
 
-	if (unlikely(mb == AT91_MB_RX_LAST && reg_msr & AT91_MSR_MMI))
+	if (unlikely(mb == get_mb_rx_last(priv) && reg_msr & AT91_MSR_MMI))
 		at91_rx_overflow_err(dev);
 }
 
@@ -561,8 +653,9 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb)
  *
  * Theory of Operation:
  *
- * 11 of the 16 mailboxes on the chip are reserved for RX. we split
- * them into 2 groups. The lower group holds 7 and upper 4 mailboxes.
+ * About 3/4 of the mailboxes (get_mb_rx_first()...get_mb_rx_last())
+ * on the chip are reserved for RX. We split them into 2 groups. The
+ * lower group ranges from get_mb_rx_first() to get_mb_rx_low_last().
  *
  * Like it or not, but the chip always saves a received CAN message
  * into the first free mailbox it finds (starting with the
@@ -610,23 +703,23 @@ static int at91_poll_rx(struct net_device *dev, int quota)
 	unsigned int mb;
 	int received = 0;
 
-	if (priv->rx_next > AT91_MB_RX_LOW_LAST &&
-	    reg_sr & AT91_MB_RX_LOW_MASK)
+	if (priv->rx_next > get_mb_rx_low_last(priv) &&
+	    reg_sr & get_mb_rx_low_mask(priv))
 		netdev_info(dev,
 			"order of incoming frames cannot be guaranteed\n");
 
  again:
-	for (mb = find_next_bit(addr, AT91_MB_RX_LAST + 1, priv->rx_next);
-	     mb < AT91_MB_RX_LAST + 1 && quota > 0;
+	for (mb = find_next_bit(addr, get_mb_tx_first(priv), priv->rx_next);
+	     mb < get_mb_tx_first(priv) && quota > 0;
 	     reg_sr = at91_read(priv, AT91_SR),
-	     mb = find_next_bit(addr, AT91_MB_RX_LAST + 1, ++priv->rx_next)) {
+	     mb = find_next_bit(addr, get_mb_tx_first(priv), ++priv->rx_next)) {
 		at91_read_msg(dev, mb);
 
 		/* reactivate mailboxes */
-		if (mb == AT91_MB_RX_LOW_LAST)
+		if (mb == get_mb_rx_low_last(priv))
 			/* all lower mailboxed, if just finished it */
 			at91_activate_rx_low(priv);
-		else if (mb > AT91_MB_RX_LOW_LAST)
+		else if (mb > get_mb_rx_low_last(priv))
 			/* only the mailbox we read */
 			at91_activate_rx_mb(priv, mb);
 
@@ -635,9 +728,9 @@ static int at91_poll_rx(struct net_device *dev, int quota)
 	}
 
 	/* upper group completed, look again in lower */
-	if (priv->rx_next > AT91_MB_RX_LOW_LAST &&
-	    quota > 0 && mb > AT91_MB_RX_LAST) {
-		priv->rx_next = AT91_MB_RX_FIRST;
+	if (priv->rx_next > get_mb_rx_low_last(priv) &&
+	    quota > 0 && mb > get_mb_rx_last(priv)) {
+		priv->rx_next = get_mb_rx_first(priv);
 		goto again;
 	}
 
@@ -720,7 +813,7 @@ static int at91_poll(struct napi_struct *napi, int quota)
 	u32 reg_sr = at91_read(priv, AT91_SR);
 	int work_done = 0;
 
-	if (reg_sr & AT91_IRQ_MB_RX)
+	if (reg_sr & get_irq_mb_rx(priv))
 		work_done += at91_poll_rx(dev, quota - work_done);
 
 	/*
@@ -734,7 +827,7 @@ static int at91_poll(struct napi_struct *napi, int quota)
 	if (work_done < quota) {
 		/* enable IRQs for frame errors and all mailboxes >= rx_next */
 		u32 reg_ier = AT91_IRQ_ERR_FRAME;
-		reg_ier |= AT91_IRQ_MB_RX & ~AT91_MB_RX_MASK(priv->rx_next);
+		reg_ier |= get_irq_mb_rx(priv) & ~AT91_MB_MASK(priv->rx_next);
 
 		napi_complete(napi);
 		at91_write(priv, AT91_IER, reg_ier);
@@ -783,7 +876,7 @@ static void at91_irq_tx(struct net_device *dev, u32 reg_sr)
 		if (likely(reg_msr & AT91_MSR_MRDY &&
 			   ~reg_msr & AT91_MSR_MABT)) {
 			/* _NOTE_: subtract AT91_MB_TX_FIRST offset from mb! */
-			can_get_echo_skb(dev, mb - AT91_MB_TX_FIRST);
+			can_get_echo_skb(dev, mb - get_mb_tx_first(priv));
 			dev->stats.tx_packets++;
 		}
 	}
@@ -793,8 +886,8 @@ static void at91_irq_tx(struct net_device *dev, u32 reg_sr)
 	 * we get a TX int for the last can frame directly before a
 	 * wrap around.
 	 */
-	if ((priv->tx_next & AT91_NEXT_MASK) != 0 ||
-	    (priv->tx_echo & AT91_NEXT_MASK) == 0)
+	if ((priv->tx_next & get_next_mask(priv)) != 0 ||
+	    (priv->tx_echo & get_next_mask(priv)) == 0)
 		netif_wake_queue(dev);
 }
 
@@ -906,6 +999,29 @@ static void at91_irq_err_state(struct net_device *dev,
 	at91_write(priv, AT91_IER, reg_ier);
 }
 
+static int at91_get_state_by_bec(const struct net_device *dev,
+		enum can_state *state)
+{
+	struct can_berr_counter bec;
+	int err;
+
+	err = at91_get_berr_counter(dev, &bec);
+	if (err)
+		return err;
+
+	if (bec.txerr < 96 && bec.rxerr < 96)
+		*state = CAN_STATE_ERROR_ACTIVE;
+	else if (bec.txerr < 128 && bec.rxerr < 128)
+		*state = CAN_STATE_ERROR_WARNING;
+	else if (bec.txerr < 256 && bec.rxerr < 256)
+		*state = CAN_STATE_ERROR_PASSIVE;
+	else
+		*state = CAN_STATE_BUS_OFF;
+
+	return 0;
+}
+
+
 static void at91_irq_err(struct net_device *dev)
 {
 	struct at91_priv *priv = netdev_priv(dev);
@@ -913,21 +1029,28 @@ static void at91_irq_err(struct net_device *dev)
 	struct can_frame *cf;
 	enum can_state new_state;
 	u32 reg_sr;
+	int err;
 
-	reg_sr = at91_read(priv, AT91_SR);
-
-	/* we need to look at the unmasked reg_sr */
-	if (unlikely(reg_sr & AT91_IRQ_BOFF))
-		new_state = CAN_STATE_BUS_OFF;
-	else if (unlikely(reg_sr & AT91_IRQ_ERRP))
-		new_state = CAN_STATE_ERROR_PASSIVE;
-	else if (unlikely(reg_sr & AT91_IRQ_WARN))
-		new_state = CAN_STATE_ERROR_WARNING;
-	else if (likely(reg_sr & AT91_IRQ_ERRA))
-		new_state = CAN_STATE_ERROR_ACTIVE;
-	else {
-		netdev_err(dev, "BUG! hardware in undefined state\n");
-		return;
+	if (at91_is_sam9263(priv)) {
+		reg_sr = at91_read(priv, AT91_SR);
+
+		/* we need to look at the unmasked reg_sr */
+		if (unlikely(reg_sr & AT91_IRQ_BOFF))
+			new_state = CAN_STATE_BUS_OFF;
+		else if (unlikely(reg_sr & AT91_IRQ_ERRP))
+			new_state = CAN_STATE_ERROR_PASSIVE;
+		else if (unlikely(reg_sr & AT91_IRQ_WARN))
+			new_state = CAN_STATE_ERROR_WARNING;
+		else if (likely(reg_sr & AT91_IRQ_ERRA))
+			new_state = CAN_STATE_ERROR_ACTIVE;
+		else {
+			netdev_err(dev, "BUG! hardware in undefined state\n");
+			return;
+		}
+	} else {
+		err = at91_get_state_by_bec(dev, &new_state);
+		if (err)
+			return;
 	}
 
 	/* state hasn't changed */
@@ -968,19 +1091,19 @@ static irqreturn_t at91_irq(int irq, void *dev_id)
 	handled = IRQ_HANDLED;
 
 	/* Receive or error interrupt? -> napi */
-	if (reg_sr & (AT91_IRQ_MB_RX | AT91_IRQ_ERR_FRAME)) {
+	if (reg_sr & (get_irq_mb_rx(priv) | AT91_IRQ_ERR_FRAME)) {
 		/*
 		 * The error bits are clear on read,
 		 * save for later use.
 		 */
 		priv->reg_sr = reg_sr;
 		at91_write(priv, AT91_IDR,
-			   AT91_IRQ_MB_RX | AT91_IRQ_ERR_FRAME);
+			   get_irq_mb_rx(priv) | AT91_IRQ_ERR_FRAME);
 		napi_schedule(&priv->napi);
 	}
 
 	/* Transmission complete interrupt */
-	if (reg_sr & AT91_IRQ_MB_TX)
+	if (reg_sr & get_irq_mb_tx(priv))
 		at91_irq_tx(dev, reg_sr);
 
 	at91_irq_err(dev);
@@ -1123,6 +1246,8 @@ static struct attribute_group at91_sysfs_attr_group = {
 
 static int __devinit at91_can_probe(struct platform_device *pdev)
 {
+	const struct at91_devtype_data *devtype_data;
+	enum at91_devtype devtype;
 	struct net_device *dev;
 	struct at91_priv *priv;
 	struct resource *res;
@@ -1130,6 +1255,9 @@ static int __devinit at91_can_probe(struct platform_device *pdev)
 	void __iomem *addr;
 	int err, irq;
 
+	devtype = pdev->id_entry->driver_data;
+	devtype_data = &at91_devtype_data[devtype];
+
 	clk = clk_get(&pdev->dev, "can_clk");
 	if (IS_ERR(clk)) {
 		dev_err(&pdev->dev, "no clock defined\n");
@@ -1157,7 +1285,8 @@ static int __devinit at91_can_probe(struct platform_device *pdev)
 		goto exit_release;
 	}
 
-	dev = alloc_candev(sizeof(struct at91_priv), AT91_MB_TX_NUM);
+	dev = alloc_candev(sizeof(struct at91_priv),
+			   1 << devtype_data->tx_shift);
 	if (!dev) {
 		err = -ENOMEM;
 		goto exit_iounmap;
@@ -1166,7 +1295,6 @@ static int __devinit at91_can_probe(struct platform_device *pdev)
 	dev->netdev_ops	= &at91_netdev_ops;
 	dev->irq = irq;
 	dev->flags |= IFF_ECHO;
-	dev->sysfs_groups[0] = &at91_sysfs_attr_group;
 
 	priv = netdev_priv(dev);
 	priv->can.clock.freq = clk_get_rate(clk);
@@ -1174,13 +1302,18 @@ static int __devinit at91_can_probe(struct platform_device *pdev)
 	priv->can.do_set_mode = at91_set_mode;
 	priv->can.do_get_berr_counter = at91_get_berr_counter;
 	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
-	priv->reg_base = addr;
 	priv->dev = dev;
+	priv->reg_base = addr;
+	priv->devtype_data = *devtype_data;
+	priv->devtype_data.type = devtype;
 	priv->clk = clk;
 	priv->pdata = pdev->dev.platform_data;
 	priv->mb0_id = 0x7ff;
 
-	netif_napi_add(dev, &priv->napi, at91_poll, AT91_NAPI_WEIGHT);
+	netif_napi_add(dev, &priv->napi, at91_poll, get_mb_rx_num(priv));
+
+	if (at91_is_sam9263(priv))
+		dev->sysfs_groups[0] = &at91_sysfs_attr_group;
 
 	dev_set_drvdata(&pdev->dev, dev);
 	SET_NETDEV_DEV(dev, &pdev->dev);
@@ -1230,13 +1363,26 @@ static int __devexit at91_can_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct platform_device_id at91_can_id_table[] = {
+	{
+		.name = "at91_can",
+		.driver_data = AT91_DEVTYPE_SAM9263,
+	}, {
+		.name = "at91sam9x5_can",
+		.driver_data = AT91_DEVTYPE_SAM9X5,
+	}, {
+		/* sentinel */
+	}
+};
+
 static struct platform_driver at91_can_driver = {
-	.probe		= at91_can_probe,
-	.remove		= __devexit_p(at91_can_remove),
-	.driver		= {
-		.name	= KBUILD_MODNAME,
-		.owner	= THIS_MODULE,
+	.probe = at91_can_probe,
+	.remove = __devexit_p(at91_can_remove),
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.owner = THIS_MODULE,
 	},
+	.id_table = at91_can_id_table,
 };
 
 static int __init at91_can_module_init(void)