diff options
| author | Dario Binacchi <dario.binacchi@amarulasolutions.com> | 2022-07-28 09:02:53 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-07-28 09:14:42 +0200 |
| commit | 3e720131960bb724e2ae365aa9e240c1c11f45c1 (patch) | |
| tree | 9f912271a30a4fa0c70a6e1cef9dc48433ad6298 /drivers | |
| parent | 341c5724d7a1c71899752201dab88f87343c0c2b (diff) | |
| download | linux-3e720131960bb724e2ae365aa9e240c1c11f45c1.tar.bz2 | |
can: slcan: add support for listen-only mode
For non-legacy, i.e. ip based configuration, add support for listen-only
mode. If listen-only is requested send a listen-only ("L\r") command
instead of an open ("O\r") command to the adapter.
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/all/20220728070254.267974-7-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/can/slcan/slcan-core.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/net/can/slcan/slcan-core.c b/drivers/net/can/slcan/slcan-core.c index 740d82d68ca4..5c7dffc1ada2 100644 --- a/drivers/net/can/slcan/slcan-core.c +++ b/drivers/net/can/slcan/slcan-core.c @@ -727,10 +727,20 @@ static int slcan_netdev_open(struct net_device *dev) } } - err = slcan_transmit_cmd(sl, "O\r"); - if (err) { - netdev_err(dev, "failed to send open command 'O\\r'\n"); - goto cmd_transmit_failed; + if (sl->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) { + err = slcan_transmit_cmd(sl, "L\r"); + if (err) { + netdev_err(dev, + "failed to send listen-only command 'L\\r'\n"); + goto cmd_transmit_failed; + } + } else { + err = slcan_transmit_cmd(sl, "O\r"); + if (err) { + netdev_err(dev, + "failed to send open command 'O\\r'\n"); + goto cmd_transmit_failed; + } } } @@ -817,6 +827,7 @@ static int slcan_open(struct tty_struct *tty) /* Configure CAN metadata */ sl->can.bitrate_const = slcan_bitrate_const; sl->can.bitrate_const_cnt = ARRAY_SIZE(slcan_bitrate_const); + sl->can.ctrlmode_supported = CAN_CTRLMODE_LISTENONLY; /* Configure netdev interface */ sl->dev = dev; |