diff options
Diffstat (limited to 'drivers/net/can/flexcan.c')
| -rw-r--r-- | drivers/net/can/flexcan.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index c5f143165f80..c78ecfca1e45 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -144,6 +144,10 @@ #define FLEXCAN_MB_CODE_MASK (0xf0ffffff) +/* FLEXCAN hardware feature flags */ +#define FLEXCAN_HAS_V10_FEATURES BIT(1) /* For core version >= 10 */ +#define FLEXCAN_HAS_BROKEN_ERR_STATE BIT(2) /* Broken error state handling */ + /* Structure of the message buffer */ struct flexcan_mb { u32 can_ctrl; @@ -178,7 +182,7 @@ struct flexcan_regs { }; struct flexcan_devtype_data { - u32 hw_ver; /* hardware controller version */ + u32 features; /* hardware controller features */ }; struct flexcan_priv { @@ -197,11 +201,11 @@ struct flexcan_priv { }; static struct flexcan_devtype_data fsl_p1010_devtype_data = { - .hw_ver = 3, + .features = FLEXCAN_HAS_BROKEN_ERR_STATE, }; - +static struct flexcan_devtype_data fsl_imx28_devtype_data; static struct flexcan_devtype_data fsl_imx6q_devtype_data = { - .hw_ver = 10, + .features = FLEXCAN_HAS_V10_FEATURES | FLEXCAN_HAS_BROKEN_ERR_STATE, }; static const struct can_bittiming_const flexcan_bittiming_const = { @@ -741,15 +745,19 @@ static int flexcan_chip_start(struct net_device *dev) * enable tx and rx warning interrupt * enable bus off interrupt * (== FLEXCAN_CTRL_ERR_STATE) - * - * _note_: we enable the "error interrupt" - * (FLEXCAN_CTRL_ERR_MSK), too. Otherwise we don't get any - * warning or bus passive interrupts. */ reg_ctrl = flexcan_read(®s->ctrl); reg_ctrl &= ~FLEXCAN_CTRL_TSYN; reg_ctrl |= FLEXCAN_CTRL_BOFF_REC | FLEXCAN_CTRL_LBUF | - FLEXCAN_CTRL_ERR_STATE | FLEXCAN_CTRL_ERR_MSK; + FLEXCAN_CTRL_ERR_STATE; + /* + * enable the "error interrupt" (FLEXCAN_CTRL_ERR_MSK), + * on most Flexcan cores, too. Otherwise we don't get + * any error warning or passive interrupts. + */ + if (priv->devtype_data->features & FLEXCAN_HAS_BROKEN_ERR_STATE || + priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) + reg_ctrl |= FLEXCAN_CTRL_ERR_MSK; /* save for later use */ priv->reg_ctrl_default = reg_ctrl; @@ -772,7 +780,7 @@ static int flexcan_chip_start(struct net_device *dev) flexcan_write(0x0, ®s->rx14mask); flexcan_write(0x0, ®s->rx15mask); - if (priv->devtype_data->hw_ver >= 10) + if (priv->devtype_data->features & FLEXCAN_HAS_V10_FEATURES) flexcan_write(0x0, ®s->rxfgmask); flexcan_transceiver_switch(priv, 1); @@ -954,6 +962,7 @@ static void __devexit unregister_flexcandev(struct net_device *dev) static const struct of_device_id flexcan_of_match[] = { { .compatible = "fsl,p1010-flexcan", .data = &fsl_p1010_devtype_data, }, + { .compatible = "fsl,imx28-flexcan", .data = &fsl_imx28_devtype_data, }, { .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, }, { /* sentinel */ }, }; |