elmcan.git - Linux SocketCAN kernel driver for ELM327 based devices.

Age	Commit message (Collapse)	Author
2019-02-19	Ignore tty RX after HW failure, locking fix	norly

2019-02-18	Work around hardware bug when waiting for '>' prompt	norly
	Sometimes the ELM327 sets 0x80 and/or 0x40 when sending '>' to indicate that it is ready to receive the next command. Masking these two bits out seems to take care of most or all hangs during initialization.
2019-02-18	Shut down ELM327's 'protocol' before reconfiguring CAN	norly
	According to ELM327's manual, AT PC should be sent before issuing AT PB.
2019-02-18	Drop fake bittimings in favor of bitrate table	norly
	The fake bittiming table produces wrong results in Linux 4.19's bitrate based parameter calculation. SocketCAN support for fixed bitrates was introduced in 431af779256c in Jan 2017, and as of Linux 4.18 the only driver using it is mcba_usb. Bitrates are also fixed in ELM327, and none of the other parameters can be tuned, so using this API makes sense here as well.
2019-02-18	Improve readability of elm327_handle_prompt()	norly

2019-02-18	Null stack variables before use	norly

2019-02-18	Don't try to send garbage after each init script entry	norly
	Previously, we'd try to send the local txbuf even though it had not been written to. Thus strlen() would overrun the buffer, which recent Linux versions catch in a BUG_ON().
2019-01-31	Use more netdev_err() instead of pr_err()	norly
	...and remove a stray comment
2019-01-31	Return cleanly in functions calling elm327_hw_failure()	norly

2019-01-31	Don't reset on HW fault, but take the interface down.	norly
	There is currently no interface to try again, other than detaching and re-attaching the line discipline. It wouldn't make much sense either, unless we've run into an unexpected state in the ELM327's firmware.
2019-01-30	elmcan_ldisc_ioctl(): Use elm->dev->name again	norly
	We now have proper locking, so dev->name is guaranteed to exist.
2019-01-30	Use netdev_* prints throughout	norly

2019-01-30	Rename elm327_panic() to elm327_hw_failure() to avoid confusion	norly

2019-01-23	Handle tty->ops->write() returning error	norly
	This was already the case in elmcan_ldisc_tx_worker(), but was missing in elm327_send().
2019-01-23	Replace '>' with constant ELM327_READY_CHAR	norly

2019-01-23	Bump N_ELMCAN to avoid conflicts with future in-tree line disciplines.	norly
	We can't go higher than 29 because of NR_LDISCS == 30 in Linux 5.0. We can't go lower than 28 because of N_NULL == 27 in Linux 5.0.
2019-01-23	Fix race between ldisc_close() and ldisc_*()	norly
	There was a chance that something needed the elm object after it was freed. Proper locking stops this.
2019-01-23	Avoid ldisc_ioctl() racing unregister_candev()	norly
	When getting the CAN interface's name via the SIOCGIFNAME ioctl, elm->dev->name may no longer exist because the interface is being shut down. Also, print the name of the interface to dmesg.
2019-01-19	Comments	norly

2018-11-13	Import first public commit	norly