diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/can/at91_can.c | 69 |
1 files changed, 55 insertions, 14 deletions
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c index 2b972812b2d1..121ede663e20 100644 --- a/drivers/net/can/at91_can.c +++ b/drivers/net/can/at91_can.c @@ -127,6 +127,7 @@ enum at91_mb_mode { enum at91_devtype { AT91_DEVTYPE_SAM9263, + AT91_DEVTYPE_SAM9X5, }; struct at91_devtype_data { @@ -163,6 +164,12 @@ static const struct at91_devtype_data at91_devtype_data[] __devinitconst = { .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 = { @@ -184,6 +191,7 @@ static inline int at91_is_sam##_model(const struct at91_priv *priv) \ } AT91_IS(9263); +AT91_IS(9X5); static inline unsigned int get_mb_rx_first(const struct at91_priv *priv) { @@ -991,6 +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); @@ -998,21 +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 */ @@ -1330,6 +1368,9 @@ 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 */ } }; |