-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Johan Hovold <johan@xxxxxxxxxx> wrote: > On Mon, Jul 06, 2015 at 03:24:17PM +0200, Peter Stuge wrote: > > > Unrelated, but I also have some ch341 hardware, and mine does not > > work with the mainline driver, it does however work reliably with the > > vendor driver. > > > > The two drivers initialize the hardware fairly differently, > > especially the baudrate generator, and the mainline driver doesn't > > support all control signals and modes. > > > > A few things are obvious and easy for me to fix and post, but I'm not > > sure how to proceed with the more complicated things; the baudrate > > seems to have two settings, one clock divisor set on init and another > > set depending on the selected baudrate. Mainline uses a different > > algorithm to set these than the vendor driver. > > > > I notice that my hardware version is more recent than the mainline > > driver was written for. I also notice that my hardware does not > > respond according to the expectations documented in mainline > > comments. > > > > > > Your thoughts? I know that another person was also working on this. > > It should be possible to detect what version of the hardware is being > used and switch baudrate-configuration scheme accordingly if necessary. > Does anyone know how the vendor driver works with older devices? > > I've added Karl on CC who I think have been working on getting these new > devices supported as well. "working on it" is perhaps a very generous way of describing it. It's one of many projects, and it's not very often on the top of the pile. My last work is here https://github.com/karlp/linux/tree/ch341-3.18.6 and included some work on reading out the baud rate. It also supports the reopening problems but it's not ready for submission. I can test out some fixes, but it's simply not a priority for me right now unfortunately. one day, one day... Sincerely, Karl Palsson -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBAgAGBQJVm7KIAAoJEBmotQ/U1cr2OH8P/A8/tWWNCRz6fgUtPxbmM73/ D272u1kTBC26PwOEN0Eb9gCAXEDk6xb7+1GcKTSzZ7v2LyAV9EbC/rfUw04+omLB F/hzNEB8h6xDIZN1Pe/3jOeZlYJxhflz/Uh1+TN7In5mr73ePhe8mrGX8UF5fTMF 1LkxExLUnVeQwGYQ9ud6EbI/mtrykz+HjsAFGpX7sDBqnlUasLU2+jDHM1nUYjp2 HXsWFlCt4/tIRUduxZiiLT0BabDCDcdlmWtu3Yd6O07GrZmfB87bvA6tH9iIMMQL Ib3AxTQwb9MB+uu7zT4OBIr0c+nkhIDsMkGb30MxPcP/1CJ4ROwPHWDfJrh9vs0J +bJW3M+pgPlS2oCXY8lZCcRxf0tcDGgHp/MDzmDavPA07jPlin7NyTNvFjcfDHJw MO86fDImwjmokC3BesRDNUkdbX8+uh1aYTxmrLhDJxMXJ9RbF954QS1Ol6BebDqD ky0MUJTepY95mb8p760erwZUWmNIJID8/ypvxKOUB2h/uvVhrMITWgr/K5dS9guj i5AeJySNrs3GAM5a/RXRV6cgSQeF3cjSqD4gH9/uASz1jaAYlQLIdQyZVwlbrC6d 4TnQu+k0uZAcOJNUmKDOfr3zrlMeU2y6OMJE8NDrSx5OBzp/FJmrX9F7OHx0Yc8r fZiL3bdtS6AIdMs1ZfLo =iQyG -----END PGP SIGNATURE-----
