diff options
| author | Marc Kleine-Budde | 2015-09-01 08:57:55 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde | 2017-02-06 15:13:42 +0100 |
| commit | 9eb7aa891101a4a09114ff3191f9877ea35eae06 (patch) | |
| tree | 33826e4957f696a23f55d007d71a44490082b5bd | |
| parent | 4bd888a80b1d48dbd83f1cbf806e923a30051958 (diff) | |
can: flexcan: add quirk FLEXCAN_QUIRK_ENABLE_EACEN_RRS
In order to receive RTR frames in the non HW FIFO mode the RSS and EACEN bits
of the reg_ctrl2 have to be activated. As this has no side effect in the FIFO
mode, we do this unconditionally on cores with the reg_ctrl2.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
| -rw-r--r-- | drivers/net/can/flexcan.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index 27121f9cd59b..a0fdced0e849 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -187,7 +187,8 @@ */ #define FLEXCAN_QUIRK_BROKEN_ERR_STATE BIT(1) /* [TR]WRN_INT not connected */ #define FLEXCAN_QUIRK_DISABLE_RXFG BIT(2) /* Disable RX FIFO Global mask */ -#define FLEXCAN_QUIRK_DISABLE_MECR BIT(3) /* Disble Memory error detection */ +#define FLEXCAN_QUIRK_ENABLE_EACEN_RRS BIT(3) /* Enable EACEN and RRS bit in ctrl2 */ +#define FLEXCAN_QUIRK_DISABLE_MECR BIT(4) /* Disble Memory error detection */ /* Structure of the message buffer */ struct flexcan_mb { @@ -276,11 +277,12 @@ static const struct flexcan_devtype_data fsl_p1010_devtype_data = { static const struct flexcan_devtype_data fsl_imx28_devtype_data; static const struct flexcan_devtype_data fsl_imx6q_devtype_data = { - .quirks = FLEXCAN_QUIRK_DISABLE_RXFG, + .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS, }; static const struct flexcan_devtype_data fsl_vf610_devtype_data = { - .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_DISABLE_MECR, + .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | + FLEXCAN_QUIRK_DISABLE_MECR, }; static const struct can_bittiming_const flexcan_bittiming_const = { @@ -825,6 +827,12 @@ static int flexcan_chip_start(struct net_device *dev) netdev_dbg(dev, "%s: writing ctrl=0x%08x", __func__, reg_ctrl); flexcan_write(reg_ctrl, ®s->ctrl); + if ((priv->devtype_data->quirks & FLEXCAN_QUIRK_ENABLE_EACEN_RRS)) { + reg_ctrl2 = flexcan_read(®s->ctrl2); + reg_ctrl2 |= FLEXCAN_CTRL2_EACEN | FLEXCAN_CTRL2_RRS; + flexcan_write(reg_ctrl2, ®s->ctrl2); + } + /* clear and invalidate all mailboxes first */ for (i = priv->tx_mb_idx; i < ARRAY_SIZE(regs->mb); i++) { flexcan_write(FLEXCAN_MB_CODE_RX_INACTIVE, |