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| author | Nikita Edward Baruzdin <nebaruzdin@gmail.com> | 2014-07-11 16:13:23 +0400 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2014-07-15 09:34:27 +0200 |
| commit | 5b853ec3494e34eb4882f65ebbcd04b495ff3c85 (patch) | |
| tree | fe4a2a3badfbaadaf8422ea5e0f6f9d3b7f47ce8 /drivers/net/can/sja1000/sja1000.c | |
| parent | dcf9e152670ea74dec24ec9ad57c495e631edba9 (diff) | |
| download | lwn-5b853ec3494e34eb4882f65ebbcd04b495ff3c85.tar.gz lwn-5b853ec3494e34eb4882f65ebbcd04b495ff3c85.zip | |
can: sja1000: Add support for CAN_CTRLMODE_PRESUME_ACK
SJA1000 has a self test mode (STM) which does not require
acknowledgement for the successful message transmission. In this mode a
node test is possible without any other active node on the bus.
This patch adds a possibility to set STM for SJA1000 controller through
specifying the corresponding CAN_CTRLMODE_PRESUME_ACK netlink flag.
Signed-off-by: Nikita Edward Baruzdin <nebaruzdin@gmail.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/sja1000/sja1000.c')
| -rw-r--r-- | drivers/net/can/sja1000/sja1000.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c index 45400d9aeedb..d1692154ed1b 100644 --- a/drivers/net/can/sja1000/sja1000.c +++ b/drivers/net/can/sja1000/sja1000.c @@ -141,6 +141,7 @@ static void set_normal_mode(struct net_device *dev) { struct sja1000_priv *priv = netdev_priv(dev); unsigned char status = priv->read_reg(priv, SJA1000_MOD); + u8 mod_reg_val = 0x00; int i; for (i = 0; i < 100; i++) { @@ -158,9 +159,10 @@ static void set_normal_mode(struct net_device *dev) /* set chip to normal mode */ if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) - priv->write_reg(priv, SJA1000_MOD, MOD_LOM); - else - priv->write_reg(priv, SJA1000_MOD, 0x00); + mod_reg_val |= MOD_LOM; + if (priv->can.ctrlmode & CAN_CTRLMODE_PRESUME_ACK) + mod_reg_val |= MOD_STM; + priv->write_reg(priv, SJA1000_MOD, mod_reg_val); udelay(10); @@ -632,7 +634,8 @@ struct net_device *alloc_sja1000dev(int sizeof_priv) CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_ONE_SHOT | - CAN_CTRLMODE_BERR_REPORTING; + CAN_CTRLMODE_BERR_REPORTING | + CAN_CTRLMODE_PRESUME_ACK; spin_lock_init(&priv->cmdreg_lock); |