Hi all,
I want to write a Linux kernel driver for a device which connects to
the legacy serial port. I started writing a driver, however I am
already stuck at the very beginning. The .connect function of my serial
driver is never called, and I just don't get why. I couldn't find any
documentation about writing such a legacy driver in Documentation nor
in LDD3. Is there anyone out there which could lend a helping hand?
I know that the device and my serial port both work. I can talk to the
device using minicom just fine. I have the following drivers loaded:
$ lsmod | grep 8250
8250_pnp 11648 0
8250 23464 1 8250_pnp
serial_core 19392 1 8250
Serial: 8250/16550 driver $Revision: 1.90 $ 2 ports, IRQ sharing disabled
00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
But I need to implement my driver in kernel space. My code looks like
this:
static struct serio_device_id taos_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_ANY,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, taos_serio_ids);
static struct serio_driver taos_drv = {
.driver = {
.name = "taos-evm",
},
.description = "TAOS evaluation module driver",
.id_table = taos_serio_ids,
.connect = taos_connect,
.disconnect = taos_disconnect,
.interrupt = taos_interrupt,
};
static int __init taos_init(void)
{
return serio_register_driver(&taos_drv);
}
static void __exit taos_exit(void)
{
serio_unregister_driver(&taos_drv);
}
The problem is that taos_connect is never called. I suppose that I need
different values for .type, .proto or .id, except that I just don't
know what to put there. I tried a few random values without success.
What's the trick?
Thanks,
--
Jean Delvare
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