I was trying to use a USb/serial adapter using the PL2303 chip set. It didn't
work using
the pl2303.o supplied with the TS7250, so I used the one in the pl2303.zip in
the Files
section of this group.
That 'sort of' worked, in that I could actually get a login prompt using getty.
However,
once logged in, you don't get line feeds, only carriage returns so you are
stuck on a single
line.
I figured this might be something to do with ioctls, so I enabled debugging and
sure
enough you get this output from dmesg:
pl2303.c: pl2303_open - submitting read urb
pl2303.c: pl2303_open - submitting interrupt urb
pl2303.c: pl2303_ioctl (0) cmd = 0x5401
pl2303.c: pl2303_ioctl not supported = 0x5401
pl2303.c: pl2303_ioctl (0) cmd = 0x540b
pl2303.c: pl2303_ioctl not supported = 0x540b
pl2303.c: pl2303_ioctl (0) cmd = 0x5402
pl2303.c: pl2303_ioctl not supported = 0x5402
pl2303.c: pl2303_set_termios - port 0, initialized = 1
Where according to include/asm/ioctls,h,
0x5401 = TCGETS,
0x5402 = TCSETS,
0x540B = TCFLSH.
Am I on the right track or is this a red herring?
I have no idea about how to add support for these ioctls to the pl2303.c code -
that's just
too far away from my comfort level in coding.
Martin
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