On Wed, Jan 26, 2022 at 07:30:53PM +0000, Stuart Henderson wrote:
> On 2022/01/26 20:19, rgc wrote:
> > On Tue, Jan 25, 2022 at 09:49:05PM +0900, rgc wrote:
> > > misc@
> > >
> > > got a CH341A SPI programmer.
> > > works on Linux.
> > > anybody got it to work with 70-current? or previous?
> > >
> > >
> > > caveat from /usr/local/share/doc/pkg-readmes/flashrom:
> > > -----
> > > flashrom also supports some external programming devices via USB; in
> > > those cases it can be run from a normal boot.
> > >
> > > so flashrom should just work (tm) right!?
> >
> > i just found the time to try flashrom in single user mode ("boot -s") and
> > i get the same error ... still timeout.
>
> Single user mode for flashrom is to provide raw system access for direct
> programming of the motherboard that you are running on, it won't help
> USB.
i assumed as much since in Linux it is required to have extra iomem parameter
>
> > > glitch# flashrom -p ch341a_spi -r top.rom
> > > flashrom v1.2 on OpenBSD 7.0 (amd64)
> > > flashrom is free software, get the source code at https://flashrom.org
> > >
> > > Using clock_gettime for delay loops (clk_id: 3, resolution: 1ns).
> > > Found Winbond flash chip "W25Q32.V" (4096 kB, SPI) on ch341a_spi.
> > > Reading flash... ch341a_spi_spi_send_command: failed to submit OUT transfer: LIBUSB_ERROR_TIMEOUT
> > > ch341a_spi_spi_send_command: Failed to write 4265 bytes
> > > Read operation failed!
> > > FAILED.
>
> Looking at the ch341a_spi code in flashrom, it looks like it uses bulk
> async transfers; these are known *not* to work on OpenBSD with libusb.
>
> (In general USB support, especially to programs running in userland, is
> not brilliant on OpenBSD; you're probably better off with a little Linux
> box for those.)
>
noted and thanks for the feedback
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