On Tue, Jun 17, 2025 at 03:41:15PM +0100, Robert Swindells wrote:
> You could look at what is in sys/dev/ic/com.c to handle a serial
> console and add the equivalent to sys/dev/usb/ucom.c.
>
> Start at the 'struct consdev comcons' declaration, that links to the
> functions needed.
I created a struct filled with functions that for now are no-ops, they
just return.
static struct consdev comcons = {
.cn_probe = ucomcnprobe,
.cn_init = ucomcninit,
.cn_getc = ucomcngetc,
.cn_putc = ucomcnputc,
.cn_pollc = ucomcnpollc,
.cn_bell = ucomcnbell,
.cn_halt = ucomcnhalt,
.cn_flush = ucomcnflush,
.cn_dev = NODEV,
.cn_pri = CN_NORMAL
};
At the end of ucom_attach, I try this if everything went fine:
comcons.cn_dev = makedev(66, 0);
cn_tab = &comcons;
That is enough to crash during the boot, and since there is no
console, there is no clue about what went wrong. Any idea?
--
Emmanuel Dreyfus
m...@netbsd.org
