Hi, These patches do some clean up and add support for Silabs cp2104 devices to the cp210x driver. Most likely cp2105 (and cp2110?) will now work as well. The cp2104 differs from earlier devices in that it cannot handle the baud div commands (neither set or get). Instead, one sets the baud rate directly, and these commands work on the older cp2102 as well. In fact, this is the way that baud rates are set in Silabs own driver which is supposed to work for legacy cp2101 devices too. cp2104 also requires the baud rate to be initialised after power on, as well as some changes to the speed handling in order to be able to use the new rates beteen 1 and 2 MBaud. So, this have been tested on cp2102 and cp2104, but unfortunately I do not have access to cp2101 or cp2103. Given that this is the way baud rates are set in Silabs latest driver (which is supposed to work for all their devices) my bet is that it will work, but I'd really appreciate if someone out there could verify this (especially cp2101, not so worried about cp2103 which is more similar to cp2102). It is possible to keep both mechanisms for setting baud rates if this should turn out to be necessary. The problem, however, is that these devices all identify themselves as the same type of device. Parsing the product string could be an option (as suggested by Andreas, and this is more feasible with this series as it is most likely only cp2101 that needs to be singled out) and apparantly cp2101 also uses a different endpoint address which could be used as an undocumented way of detecting these legacy devices. Thanks, Johan Johan Hovold (7): USB: cp210x: fix debug output USB: cp210x: call generic open last in open USB: cp210x: use direct baud-rate commands USB: cp210x: do not map baud rates to B0 USB: cp210x: clean up, refactor and document speed handling USB: cp210x: initialise baud rate at open USB: cp210x: allow more baud rates above 1Mbaud drivers/usb/serial/cp210x.c | 120 +++++++++++++++++++++++++++++-------------- 1 files changed, 81 insertions(+), 39 deletions(-) -- 1.7.8 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
