diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2010-10-21 05:01:18 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-25 01:47:50 +0400 |
| commit | 33a6f298c28a65fa643bc70222ebffe75077f197 (patch) | |
| tree | 8035cabbb6a6252ae6d33224390a8eb52be07fed /drivers/net/can/at91_can.c | |
| parent | a9d992ecb36f8ed00130eaf41a406fda03433d23 (diff) | |
| download | linux-33a6f298c28a65fa643bc70222ebffe75077f197.tar.xz | |
can: at91_can: implement and use at91_get_berr_counter
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/can/at91_can.c')
| -rw-r--r-- | drivers/net/can/at91_can.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c index 61878135a9df..4fa0aa0e3f9c 100644 --- a/drivers/net/can/at91_can.c +++ b/drivers/net/can/at91_can.c @@ -275,6 +275,18 @@ static int at91_set_bittiming(struct net_device *dev) return 0; } +static int at91_get_berr_counter(const struct net_device *dev, + struct can_berr_counter *bec) +{ + const struct at91_priv *priv = netdev_priv(dev); + u32 reg_ecr = at91_read(priv, AT91_ECR); + + bec->rxerr = reg_ecr & 0xff; + bec->txerr = reg_ecr >> 16; + + return 0; +} + static void at91_chip_start(struct net_device *dev) { struct at91_priv *priv = netdev_priv(dev); @@ -764,12 +776,10 @@ static void at91_irq_err_state(struct net_device *dev, struct can_frame *cf, enum can_state new_state) { struct at91_priv *priv = netdev_priv(dev); - u32 reg_idr = 0, reg_ier = 0, reg_ecr; - u8 tec, rec; + u32 reg_idr = 0, reg_ier = 0; + struct can_berr_counter bec; - reg_ecr = at91_read(priv, AT91_ECR); - rec = reg_ecr & 0xff; - tec = reg_ecr >> 16; + at91_get_berr_counter(dev, &bec); switch (priv->can.state) { case CAN_STATE_ERROR_ACTIVE: @@ -784,7 +794,7 @@ static void at91_irq_err_state(struct net_device *dev, priv->can.can_stats.error_warning++; cf->can_id |= CAN_ERR_CRTL; - cf->data[1] = (tec > rec) ? + cf->data[1] = (bec.txerr > bec.rxerr) ? CAN_ERR_CRTL_TX_WARNING : CAN_ERR_CRTL_RX_WARNING; } @@ -800,7 +810,7 @@ static void at91_irq_err_state(struct net_device *dev, priv->can.can_stats.error_passive++; cf->can_id |= CAN_ERR_CRTL; - cf->data[1] = (tec > rec) ? + cf->data[1] = (bec.txerr > bec.rxerr) ? CAN_ERR_CRTL_TX_PASSIVE : CAN_ERR_CRTL_RX_PASSIVE; } @@ -1078,6 +1088,7 @@ static int __devinit at91_can_probe(struct platform_device *pdev) priv->can.bittiming_const = &at91_bittiming_const; priv->can.do_set_bittiming = at91_set_bittiming; 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; |